JPH1095491A - Tank lorry mixture prevention device - Google Patents

Abstract

(57) [Summary] [Problem] First, oil mixing accidents and liquid mixing accidents are reliably prevented, and secondly, this is easily and easily realized, and thirdly, a discharge valve is opened by mischief. Fourthly, the present invention proposes a tank lorry mixture prevention device which can easily cope with a malfunction after the discharge valve is opened. SOLUTION: In the mixed liquid prevention device 30, when loading, designation by a loaded liquid type designation means is performed, and when unloading, designation by unloading tank chamber designation means accompanying connection of a hose to a discharge port, and unloading. The designation by the liquid type designation means is performed. Only when the loaded liquid type information of the designated tank chamber and the unloading liquid type information match, the control valve of that tank chamber is opened, the cylinder 37 is driven, and the stopper 3
5 takes the unlocked position of the stopper receiver 34 with the inclination 61 on the handle 7 side, the handle 7 can be turned to the open position, and the discharge valve V can be opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing liquid mixture in a tank lorry. That is, the present invention relates to a liquid mixture prevention device for preventing a liquid type different from a liquid type to be actually unloaded in a tank truck from being unloaded.

[0002]

2. Description of the Related Art In a tank lorry, the inside of a tank is generally divided into a plurality of tank chambers, and different liquid types, such as regular gasoline, high-octane gasoline, kerosene, light oil, etc., are stored in an oil tank storage tank. It is often loaded and transported. The unloading from the tank lorry is performed by connecting the tank room in which the liquid type to be unloaded is loaded and the receiving tank for the liquid type on the ground equipment side such as a gas station to the bottom valve, discharge pipe, This is implemented by connecting a hose via a discharge valve, a discharge port, and the like, and switching the discharge valve from closed to open.

[0003]

When unloading with such a tank truck, the type of liquid to be actually unloaded to a receiving tank such as a gas station is
The liquid type loaded in the tank chamber where the bottom valve and discharge valve are opened and unloaded must, of course, always match, but this judgment relied on visual observation and memory. . In other words, the determination of what kind of liquid is loaded in which tank chamber, what kind of liquid should be unloaded, which discharge valve should be switched from closed to open with the handle, etc. are visually and memorized. Often relied on. Therefore, there is a risk that a liquid type different from the liquid type to be unloaded may be unloaded due to a visual mistake, a memory error, a misperception, a work error, an operation error, or the like. And if a different liquid type that does not match the liquid type to be unloaded is unintentionally unloaded, a different liquid type will be mixed in a receiving tank such as a gas station, An oil mixing accident and a liquid mixture accident occur, which is extremely dangerous, and also requires a great deal of time for post-recovery processing.

By the way, as compared with the so-called centralized piping type tank lorry, the so-called independent piping type tank lorry has a particularly high risk of occurrence of such oil mixture accident and liquid mixture accident. That is, in the tank lorry of the independent piping system, the inside of the tank is partitioned into a plurality of tank chambers, and a dedicated bottom valve, a discharge pipe, a discharge valve, a discharge port, and the like are provided in order for each tank chamber. A handle for opening and closing the valve is provided. Then, by rotating a handle for a certain tank chamber from the closed position to the open position,
From the tank chamber, through the bottom valve of the opening, the discharge pipe, the discharge valve switched to open by the handle, the discharge port, etc., the unloading is performed via the hose connected to the discharge port. . For the convenience of unloading operation, in this independent piping type tank lorry, the discharge valve for each tank chamber, discharge port, handle for opening and closing the discharge valve, etc. are assembled near the center under the side of the tank. , Are intensively arranged.

Therefore, in such an independent piping type tank lorry, the type of liquid to be unloaded is different from the type of liquid to be unloaded instead of the discharge port of the tank chamber to be unloaded. There is a mistake in connecting the hose to the discharge port of the adjacent tank chamber where the liquid type is loaded, or a handle for opening and closing the discharge valve of the tank chamber to be unloaded. The risk of oil mixing accidents and liquid mixture accidents was high due to overlapping rotation operation mistakes, such as accidentally pulling the handle for opening and closing the discharge valve in the tank chamber. In other words, due to the above, a different type of liquid that does not match the type of liquid to be unloaded is unloaded into the receiving tank of a gas station or the like, so that a different type of liquid is mixed in the receiving tank. , It has been pointed out that a liquid mixture accident is likely to occur and is dangerous.

The present invention has been made in view of such circumstances, and has been made to solve the problems in the above-described conventional example.
A stopper receiver attached to a discharge valve opening / closing handle, a stopper displaceable to a lock position and an unlock position thereof, a spring for urging the stopper to the lock position, and a cylinder for displacing the stopper to the unlock position; A lock device provided with a cylinder control valve is employed, and such a lock device is provided with
It is used in combination with a control device provided with an unloading tank room specifying means, an unloading liquid type specifying means, a control means and the like. Further, in claim 2, the stopper receiver is provided with an engagement hole, and in claim 3, an unloading tank chamber specifying means is provided for each discharge port to detect the connection of the hose.
A predetermined inclination is formed outside the engagement hole of the stopper receiver.

[0007] Accordingly, the object of the present invention is, firstly, to propose an apparatus for preventing a liquid mixture in a tank lorry, in which an oil mixing accident and a liquid mixing accident can be reliably prevented, and secondly, this can be easily and easily realized. And Furthermore, in claim 3, the third
In addition, it is possible to avoid opening the discharge valve other than when the hose is connected,
Fourth, it is an object of the present invention to propose a tank lorry mixture prevention device which can easily cope with a malfunction after the discharge valve is opened.

[0008]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
In the tank lorry mixture prevention device, the inside of the tank is divided into a plurality of tank chambers, and a bottom valve,
A discharge pipe, a discharge valve, a discharge port, and the like are provided in order, and a handle for opening and closing the discharge valve is provided. By rotating the handle from the closed position to the open position, the bottom valve, the discharge valve, and the like are discharged from the tank chamber. After passing through pipes, discharge valves, discharge ports, etc., unloading is performed via hoses connected to the discharge ports.
Used in tank lorries.

The liquid mixture prevention device has a lock device and a control device for preventing a liquid type different from the liquid type to be actually unloaded from being unloaded. First, the lock position is a stopper receiver fixedly attached to a handle for opening and closing the discharge valve of the tank chamber, a stopper displaceable between a lock position and an unlock position of the stopper receiver when the handle is closed, and the stopper A cylinder that constantly displaces the stopper from the lock position to the unlocked position against the urging force of the spring by driving, and a spring that is interposed between the cylinder and the drive source to open and close the stopper. And a control valve for driving and releasing the driving of the cylinder.

[0010] Further, the control device is provided with regular gasoline, high-octane gasoline, kerosene,
A loading liquid type designating means which is manually operated to designate a liquid type such as light oil, an unloading tank room designating means which designates the tank chamber where the actual unloading is to be performed, and an actual unloading operation. An unloading liquid type specifying means for specifying a liquid type and a control means are provided. The control means includes: loading liquid type information by the loading liquid type specifying means for the tank chamber specified by the unloading tank chamber specifying means; unloading liquid type information by the unloading liquid type specifying means; The control valve of the lock device of the tank chamber is opened, and the cylinder of the lock device of the tank chamber is driven to move the stopper from the normal lock position to the unlock position only when the two information match. To be displaced.

Next, claim 2 is as follows. That is, in the tank lorry liquid mixture preventing device according to the second aspect, in the tank lorry liquid mixture preventing device according to the first aspect, the locking device is such that the spring is built in the cylinder, and the stopper receiver has an engagement hole. Wherein the stopper has a shape that can be inserted into the engagement hole of the stopper receiver. Claim 3 is as follows. That is, according to the third aspect of the present invention, there is provided a tank lorry mixture preventing device, wherein the unloading tank room designation means of the control device is provided for each of the discharge ports. By detecting the connection of the hose to the outlet, the tank chamber where the unloading is to be performed is designated.

Next, claim 4 is as follows. That is, in the tank lorry mixture prevention device according to the fourth aspect, in the tank lorry mixture prevention device according to the second aspect, an inclination is formed outside the engagement hole of the stopper receiver of the lock device. When the handle is rotated from the open position to the closed position while the stopper is at the lock position, the stopper comes into contact with and pushes the stopper to temporarily displace the stopper to the unlock position. And a guide shape that allows the stopper to return to the locked position inserted into the engagement hole by the urging force of the spring afterwards. .

In this tank lorry mixture prevention device, the loading liquid type for each tank chamber is designated by the loading liquid type designation means of the control device when loading. At the time of unloading, the tank chamber to be unloaded is specified by the unloading tank chamber specifying means. For example, in claim 3, the tank chamber to be unloaded is specified by connecting a hose to the discharge port, and The liquid type to be actually unloaded to a receiving tank such as a gas station is specified by the unloading liquid type specifying means. Only when the loaded liquid type information of the tank chamber specified by the unloading tank type specifying unit and the unloading liquid type information by the unloading liquid type specifying unit match, the control unit. At, the control valve of the lock device of the tank chamber is opened.

As described above, the lock device is controlled by the control device. The cylinder of the lock device is driven for the tank chamber in which the control valve is opened, and the stopper is displaced from the locked position of the stopper receiver on the handle side to the unlocked position against the urging force of the spring. In the lock device according to the second aspect, the stopper is disengaged from the insertion of the stopper receiver into the engagement hole. Then, by turning the handle from the closed position to the open position, the discharge valve is switched from closed to open, and unloading is started. Claim 4
Then, even if the stopper is displaced from the unlocked position to the locked position during unloading, by rotating the handle from the open position to the closed position,
The inclination of the outside of the engagement hole of the stopper receiver abuts and pushes the stopper of the lock device. Then, the handle is brought to the closed position, and the discharge valve is changed from open to closed. Thereby, the stopper returns to the lock position and is fitted into the stopper receiver, whereby the handle is locked at the closed position.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1, FIG. 2,
3, 4, 5, 6, 7, 8, 9, etc., are provided for describing the embodiment of the present invention. And FIG. 1 and FIG.
3 and 4 are side views of the lock device and the like, FIG. 5 (1) is a front cross-sectional view of a stopper receiver of the lock device, and FIG. It is a perspective view of the stopper receiver. 6 is an explanatory front view of a lever for opening and closing the bottom valve and other parts, FIG. 7 is an explanatory front view of the control device and other parts, FIG. 8 is a block diagram of the control device, and FIG. 9 is a perspective view of the tank lorry. . FIG. 10 is an explanatory side view of the tank truck.

First, the tank lorry 1 will be generally described. As shown in FIG. 9 and FIG.
Is divided into a plurality of tank chambers 3 in the tank 2,
A bottom valve 4, a discharge pipe 5, a discharge valve V, a discharge port 6, etc. are provided in order for each tank chamber 3, and a handle 7 for opening and closing the discharge valve V is provided (FIGS. 1, 2, and 7). Etc.). Therefore, the lever is pivoted to switch the bottom valve 4 to open, and the handle 7 is pivoted from the closed position to the open position to switch the discharge valve V to open. 4, discharge pipe 5, discharge valve V,
After passing through the discharge port 6 and the like, the hose 8 connected to the discharge port 6
Unloading is performed via.

The tank lorry 1 will be described in more detail. The inside of the tank 2 of the tank lorry 1 is divided into about 2 to 7 chambers (6 in the illustrated example) by a partition plate 9 along the width direction.
) Is divided into a plurality of tank chambers 3. And
Regular gasoline, high-octane gasoline, kerosene, light oil,
Other liquids such as oil are loaded from the storage tanks (not shown) of the oil tanks into the respective tank chambers 3 through the inlets provided in the manholes 10. Liquid is often loaded. Accordingly, the tank lorry 1 loads and transports these liquids in the respective tank chambers 3 of the tank 2 and unloads them to a ground facility at the destination, for example, a receiving tank (not shown) such as an underground tank of the gas station 11. Unloading from the tank 2 to a receiving tank such as a gas station 11 is performed for each tank chamber 3 by a bottom valve 4 whose bottom is switched from normally closed to open, and a discharge pipe having one end connected to the bottom valve 4. 5, a discharge port 6 with a discharge valve V located at the other end of the discharge pipe 5 at the lower left and right sides of the tank 2, a hose 8 having one end connected to the discharge port 6 for unloading, and the other end of the hose 8. Is carried out through a receiving port 12, which is a refueling port of a cargo receiving tank of a gas station 11 or the like to which the fuel tank 11 is connected. For example, regular gasoline, high-octane gasoline,
The hose 8 is divided for each type of liquid, that is, for each type of liquid, such as kerosene, light oil, and other oil.
Selectively connected to

The tank lorry 1 may be of a single unit type or a trailer type in which a trailer on which the tank 2 is mounted is pulled by a tractor. Reference numeral 13 in FIG. In this tank lorry 1, an independent piping system is adopted instead of a so-called centralized piping system. For each tank chamber 3, a dedicated bottom valve 4, discharge pipe 5, discharge valve V, discharge port 6, etc. 4 Opening / closing lever, discharge valve V opening / closing handle 7
Etc. are provided. The discharge valve V and the discharge port 6 for each tank chamber 3 are gathered near the center below the side surface of the tank 2,
It is arranged intensively. The discharge pipe 5 of each tank chamber 3 is branched right and left on the way, and a discharge port 6 with a discharge valve V is often provided at each of the left and right ends. In the figure, reference numeral 14 denotes an operation box. The tank lorry 1 is generally like this.

Next, an example of the opening / closing method of the bottom valve 4 provided at the bottom of each tank chamber 3 will be described with reference to FIGS. 6 and 7. As shown in FIG. 6, the lever 15 for opening and closing the bottom valve 4 is tilted about a fulcrum 17 consisting of a horizontal pin attached to a frame 16 as shown in the closed position indicated by the solid line and the imaginary line indicated in the figure. Between the opened positions, the user can grasp the upper part and rotate left and right in the drawing.
Reference numeral 18 denotes a stopper.
5 is positioned and held at the closed position of the bottom valve 4. Reference numeral 19 denotes a lever return. The lever return 19 includes a fixed position shown in the figure around a fulcrum 20 formed of a horizontal pin attached to the frame 16 and an emergency position (not shown) rotated upward. In addition, it can be turned. Then, the lever return 19 positions and holds the lever 15 at the open position of the bottom valve 4 at the regular position shown in the drawing and held on the stopper 21. Also, this lever return 19 is
It is also used for lifting all the levers 15 in the open position to the closed position by lifting and rotating the normal position shown in the figure to the emergency position above. That is, the lever return 19 is used when it becomes necessary to close the bottom valve 4 urgently during unloading.

One end of an arm 22 is pivotally connected by a pin 23 below the fulcrum 17 of the lever 15, and one end of a wire 24 is fixed to the other end of the arm 22. The other end of the drawn wire 24 is fixed to the L-shaped lever 25 of the bottom valve 4 as shown in FIG. First, when the lever 15 is in the closed position, the arm 22
The bottom valve 4 is closed without the L-shaped lever 25 being pulled through the wire 24. That is, the valve element 26 of the bottom valve 4 is pressed against the valve seat 28 by the urging force of the spring 27 provided therein, and is normally closed. On the other hand, when the lever 15 is rotated to the open position, the arm 22 or the wire 2 beyond the dead point of the fulcrum 17 is
4, the L-shaped lever 25 is pulled, and the valve body 26 is separated from the valve seat 28 via the shaft 29 against the urging force of the spring 27. In this way, the bottom valve 4 is switched from closed to open. The opening and closing method of the bottom valve 4 is, for example, as described above.

Hereinafter, the liquid mixture prevention device 30 will be described.
The liquid mixture prevention device 30 prevents a liquid type different from the liquid type to be actually unloaded in the tank lorry 1 from being unloaded. The lock device 31 and the control device 32 , Has. The lock device 31 is attached and fixed to the central portion 33 of the handle 7 for opening and closing the discharge valve V of the tank chamber 3 as shown in FIGS. 1, 2, 3, 4, 5, 6, and the like. Stopper receiver 34
A stopper 35 that can be displaced between a lock position B and an unlock position C of the stopper receiver 34 at the closed position A of the handle 7, a spring 36 that constantly urges the stopper 35 to the lock position B, and a stopper 35 that is driven. And a control valve 39 interposed between the cylinder 37 and the drive source 38 for driving and releasing the cylinder 37 by opening and closing, the cylinder 37 being displaced from the lock position B to the unlock position C against the urging force of the spring 36. , Has.

The lock device 31 will be described in more detail. First, the stopper receiver 34 of the lock device 31
Is, as shown in FIGS. 1, 2, 3, 4, 5, etc.
At the center 33 of the handle 7 for opening and closing the discharge valve V, a bolt 4
At 0, it is fixed. That is, the stopper receiver 3
4 has an engagement hole 41 formed vertically at the top,
In the illustrated example, a through hole 42 communicating with the engaging hole 41 is formed laterally at the center. The upper surface of the engagement hole portion 41 is open, and for example, the stopper 35 having a vertical shaft shape is inserted into the lock position B from above at the lock position B, for example, has a vertical circular hole shape. The insertion hole 42 has a shape substantially matching the cross-sectional shape of the handle 7, for example, a rectangular hole shape, and the handle 7 is inserted from the opened front and rear surfaces with some left and right adjustment gaps 43. Consisting of Bolt 40
Is for fixing the stopper receiver 34 to the central portion 33 of the handle 7 inserted through the through hole 42 in such a manner from both left and right lateral directions. Adjustment screw holes 44 formed in the holes (see FIG. 5)
The screw 7 is screwed and fixed from both sides to hold the central portion 33 of the handle 7 in the through hole 42 through the through hole.

The bolts 40 also function as position adjusting means. That is, the stopper receiving portion 34 and the engaging hole portion 41 are securely fixed by the stopper 35 which takes the lock position B with respect to the central portion 33 of the handle 7 which is rotated along a fixed locus and takes the closed position A at the fixed position. In order to be locked and inserted, the position can be adjusted in the front and rear, left and right directions (X and Y directions). That is, in the front-back direction, the handle 7
The stopper receiver 34 is moved along
The stopper receiver 34 is moved using the adjustment gap 43,
After adjusting the position of the stopper receiver 34, the stopper receiver 34 is fixed to the handle 7 with the two bolts 40. In the drawing, reference numeral 45 denotes a rotation shaft, which is fixed to the base end of the handle 7 and opens and closes the discharge valve V by its rotation. The handle 7 is shown in FIGS.
In FIG. 3, the discharge valve V is in the closed position A, and in FIG. 4, the discharge valve V is in the open position D.
And the open position D, it is rotatable 90 ° horizontally about the rotary shaft 45. The stopper receiver 34 is thus attached and fixed to the handle 7 side.

Next, the stopper 35 of the lock device 31 will be described. The stopper 35 has a lock position B for locking the stopper receiver 34 as shown in FIG. 1 at a closed position A of the handle 7 and a lock position B as shown in FIGS.
It can be displaced to an unlock position C for unlocking. That is, the stopper 35 has, for example, a vertical shaft shape, and the upper portion is attached and fixed to the distal end portion of the piston rod 46 of the cylinder 37 described below, and the lower portion is located on the handle 7 side at the closed position A of the handle 7. A lower locking position B which is opposed to the engagement hole 41 of the stopper receiver 34 and is inserted into the engagement hole 41 and locks the stopper receiver 34, and the engagement of the engagement hole 41 with the stopper reception is released. The upper unlocked position C where the lock of 34 has been unlocked
In addition, it can be moved up and down. The stopper 35 is configured as described above.

Next, the cylinder 37 and the spring 36 of the lock device 31 will be described. First, the cylinder 37
Is attached and fixed to the distal end of the piston rod 46, and is fixed to the discharge valve V side, that is, the non-moving portion side. That is, the base end of an L-shaped bent bracket 48 is mounted and fixed to the flange 47 attached to the discharge valve V, and the base end of a mounting member 49 is mounted and fixed to the upper end of the bracket 48. Has been
The cylinder 37 is vertically mounted and fixed on the free end of the mounting member 49, and a guide hole 5 is provided in the front end.
0 is formed. The guide hole 50 has a vertical through-hole shape, and is located below the cylinder 37, and functions to guide a stopper 35 having a vertical shaft shape attached and fixed to a tip end portion of a piston rod 46 thereof.

In the illustrated example, a spring 36 is provided on the side of the cylinder 37 opposite to the piston rod 46. The spring 36 constantly urges the stopper 35 to the lower locking position B via the piston rod 46 by the urging force. Stopper 35
When the cylinder 37 is released from driving, the lower locking position B is taken via the piston rod 46 advanced by the biasing force of the spring 36, and the lower end portion projects from the guide hole 50 to engage the engagement hole. 41, the stopper receiver 34 and the handle 7 are locked immovably in the closed position A. On the other hand, when the cylinder 37 is driven, the stopper 35 takes the upper lock release position C with the piston rod 46 retracted against the urging force of the spring 36, and the lower end thereof is in the guide hole 50. The stopper receiving 34 and the handle 7 are unlocked, and can be rotated from the closed position A to the open position D. The spring 36 can of course be arranged outside the cylinder 37 regardless of the illustrated example. The cylinder 37 and the spring 36 are configured as described above.

Next, the control valve 39 of the lock device 31 will be described. The control valve 39 opens and closes to drive and release the cylinder 37 in this manner.
As shown in (1), it is interposed in a pipe 51 between the cylinder 37 and its driving source 38. First, as the drive source 38 shown in FIG. 7, an air tank which is also used for braking the tank truck 1 is used.
8 barrel air tank and 3 cylinders
7, a protection valve 52, a two-way valve 53, a regulator 54, a pressure gauge 55, a control valve 39, and the like are interposed in order from the upstream side in a pipe 51, that is, an air pipe. It is to be noted that a hydraulic system may be used instead of the illustrated example of the air system. In this case, the corresponding drive source 38, cylinder 37, and piping 51 are used.

The protection valve 52 is connected to the drive source 38.
If the air pressure on the brake side of the barrel air tank does not exceed a certain value, control is performed so that air does not flow out to the pipe 51 side. In other words, if the air pressure on the brake side drops and does not reach a certain value,
Since the brake of the tank lorry 1 does not operate, in order to avoid such a situation, the protection valve 5
2 is used as a kind of safety device. The regulator 54 functions to adjust the air pressure in the pipe 51 from a primary pressure to a secondary pressure. In the illustrated example, an electromagnetic valve is used as the control valve 39. The control means 56 of the control device 32, which will be described in detail below, switches from open to closed by being energized and excited. The control valve 39 is configured as described above.

The lock device 31 of the liquid mixture prevention device 30
Is provided with such a stopper receiver 34 provided on the handle 7 side, a stopper 35 provided on the discharge valve V side, a spring 36, a cylinder 37, a control valve 39 and the like.
And such a lock device 31 is provided for each handle 7 for opening and closing the discharge valve V of each tank chamber 3. Next, a control device 32 used in combination with the lock device 31 in the liquid mixture prevention device 30 will be described.

As shown in FIG. 7, FIG. 8, FIG. 9, etc., the control unit 32 controls the next loading liquid type specifying means 57, unloading tank chamber specifying means 58, unloading liquid type specifying means 59, Means 56 and the like. That is, the control device 32 performs loading and unloading, which is manually operated to specify the type of liquid such as regular gasoline, high-octane gasoline, kerosene, or light oil loaded in each tank chamber 3, and the actual unloading. Unloading tank room specifying means 5 for specifying the tank room 3 to be released
8; an unloading liquid type specifying means 59 for specifying a liquid type to be actually unloaded; and a next control means 56. Then, the control means 56 includes the unloading tank room specifying means 5
The loading liquid type information by the loading liquid type specifying means 57 for the tank chamber 3 specified at 8 and the unloading liquid type specifying means 59
The control valve 39 of the lock device 31 of the tank chamber 3 is compared only when the two types of information match.
Is opened, and the cylinder 37 of the lock device 31 of the tank chamber 3 is driven to displace the stopper 35 from the normal lock position B to the lock release position C.

The control device 32 will be described in more detail. First, the loading liquid type specifying means 57 of the control device 32
Is provided corresponding to each tank chamber 3, and when the liquid is loaded into each tank chamber 3, the type of the liquid to be loaded, that is, the liquid type is selected by a button switch, a dial, or the like.
This is designated by an input operation, a liquid type key loading operation, or the like, and is used as loaded liquid type information. Further, such a designation operation by the loading liquid type designation means 57 is performed, for example, by referring to a loading slip to specify the volume to be loaded together with the loaded liquid type for each tank chamber 3.

Further, the loading liquid type specifying means 57 uses an IC card, a magnetic card, or the like issued from the oil depot at the time of loading, irrespective of the selection, input, and loading operations as described above.
It is also conceivable to use a reading method, a reading method using an oil type display plate on the back of the tank 2, which is required by law, and other various electric and mechanical methods. The loaded liquid type information from the loaded liquid type designation unit 57 is sent to the control unit 56 and stored. The loading liquid type specifying means 57 is configured as described above.

Next, the unloading tank room specifying means 58 of the control device 32 specifies the tank room 3 where the unloading is to be performed at the time of unloading. For example, when unloading, the control means 5
By referring to a display (not shown) attached to 6 and displaying the loading liquid type information from the loading liquid type specifying means 57, the loading liquid type and loading capacity of each tank chamber 3 are confirmed. Thus, a method is conceivable in which the room number of the tank room 3 to be unloaded is specifically specified by selecting and inputting a button switch, a dial, or the like of the unloading tank room specifying means 58. In the illustrated example, unloading tank chamber specifying means 58 is provided for each discharge port 6 of each tank chamber 3 irrespective of the method of operating such a button switch, dial, or the like. By detecting the connection of the hose 8 to the tank 3, the tank chamber 3 scheduled to be unloaded is automatically determined and designated. Needless to say, the connection of the hose 8 to the discharge port 6 is performed by referring to and confirming, for example, the above-described loaded liquid type information for each of the tank chambers 3 on the display unit, and matching the liquid type to be unloaded. This is carried out by specifically recognizing the three discharge ports 6. The unloading tank room information from the unloading tank room specifying means 58 is sent to the control means 56. The unloading tank designating means 58 is configured as described above.

Next, the unloading liquid type specifying means 59 of the control device 32 specifies the liquid type to be actually unloaded at the time of unloading. That is, at the time of unloading, the unloading liquid type designation means 59 specifies the liquid type to be unloaded via the receiving port 12, that is, the liquid type at the receiving port 12 to which the hose 8 is connected, for example, in the receiving tank of the gas station 11. A method of selecting, inputting, loading, reading, etc., using a button switch, a dial, a liquid type key, an IC card, a magnetic card, etc., in accordance with the loading liquid type specifying means 57 described above. In some cases, the unloading capacity is specified together with the type of liquid to be unloaded.

For example, such an unloading liquid type specifying means 5
It is also conceivable to use a bar code reader as 9, and in this case, a bar code attached to each receiving port 12 of the receiving tank of the gas station 11 according to the liquid type is used by this bar code reader. read. That is, a bar code attached to the receiving port 12 to which the hose 8 is connected and indicating the liquid type of the receiving tank, that is, a bar code indicating the liquid type to be actually unloaded, is used as the unloading liquid type specifying means. A method is conceivable in which a bar code reader 59 is used to read the signal, and the read signal is transmitted to the control means 56 wirelessly, for example. For example, the unloading liquid type information from the unloading liquid type specifying means 59 is sent to the control means 56 in this manner. The unloading liquid type designation means 59 is configured as described above.

Next, the control means 56 of the control device 32 includes, for example, a microcomputer disposed in the operation box 14 described above, a comparator with a memory, and the like. The control means 56 includes the loading liquid type information from the loading liquid type specifying means 57 described above, the unloading tank chamber information from the unloading tank chamber specifying means 58, and the unloading liquid type specifying means 59. Unloading liquid type information is input as a signal via the circuit 60 and the like, and stored as appropriate.

Then, the control means 56, on condition that all of these three pieces of information have been input, sets the loading liquid type information and the unloading liquid type information for the tank chamber 3 specified in the unloading tank chamber information. (If the loading capacity is input as information together with the loading liquid type, and the unloading capacity is input as information together with the unloading liquid type as described above, the control unit 56 sets the liquid Only when the two pieces of information match, the control signal for opening the control valve 39 of the lock device 31 of the tank chamber 3 is sent out only when the two pieces of information match. . Therefore, in the lock device 31 of the tank chamber 3, the control valve 39
Is switched from closed to open, the cylinder 37 is driven, and the stopper 35 is displaced from the normally locked position B to the unlocked position C.

By the way, as described above, the control means 56 determines the information of the loaded liquid type, the information of the unloading tank room, and the information of the unloaded liquid type.
A control signal for opening the control valve 39 can be transmitted on condition that the two pieces of information are input. Therefore, if the input of the one information is absent, for example, in the illustrated example, when the connection of the hose 8 is disconnected, the unloading tank chamber information is not input, so that the control means 56 does not transmit the control signal for opening the control valve 39, Accordingly, the cylinder 37 is released from the drive, and the stopper 35 returns from the unlocked position C to the locked position B. Control means 56
Is like this. The control device 32 controls the loading liquid type specifying unit 57 and the unloading tank room specifying unit 5.
8, an unloading liquid type designation means 59, a control means 56, and the like.

Here, regarding the above-described engagement hole 41,
The slope 61 formed on the outside will be described. As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG.
A slope 61 is formed on one side outside of 1. If the stopper 35 is in the lock position B and the handle 7 is rotated from the open position D to the closed position A, the inclination 61 first contacts and pushes the stopper 35. The stopper 35 has a guide shape in which the stopper 35 can be once displaced toward the unlock position C and the stopper 35 can be returned to the lock position B by the urging force of the spring 36 afterwards.

The tilt 61 will be described in detail below.
As described above, the cylinder 37 is driven by the control means 56,
After the stopper 35 has taken the upper unlock position C and the handle 7 has been unlocked, and the discharge valve V has been opened by rotating from the closed position A to the open position D, that is, after unloading has started (FIG. Normally, the stopper 35 holds the unlocked position C as it is, but for some reason, for example, a malfunction of the control device 32 such as the control means 56 causes the stopper 35 to take the lower locked position B. The following is the case.

That is, in this case, when the handle 7 is rotated from the open position D to the closed position A after unloading is completed, first, the outer slope 61 of the stopper receiver 34 on the handle 7 side is moved to the upper stopper. Abuts 35. Since the slope 61 has a shape gradually lowered from the upper edge of the engagement hole 42, the stopper 61 slides from the lower lock position B to the upper lock release position C while slidingly contacting the stopper 35. , And push upward. Then, by further rotating the handle 7 to the open position A, the inclination 61 passes through the sliding contact position with the stopper 35, so that the handle 7 takes the closed position A and the discharge valve V is changed from open to closed. At the same time, the pushing of the stopper 35 due to the inclination 61 of the stopper receiver 34 on the handle 7 side is released. So,
The stopper 35 returns to the lower lock position B again by the urging force of the spring 36 from the upper lock release position C side where the stopper 35 has once been displaced as described above, and the stopper receiver 34.
To lock the handle 7 immovably (see FIG. 1). An inclined portion 61 having such a guide shape is formed outside the stopper receiver 34 of the lock device 31, so that the discharge valve V can be switched from open to closed without any trouble even when the control device 32 is erroneously operated. ing.

The present invention is configured as described above. Then, it becomes as follows. In the liquid mixture prevention device 30 of the tank lorry 1, first, when loading, the loaded liquid type designation means 57 of the control device 32 is manually operated, and the loaded liquid type is designated for each tank chamber 3.

At the time of unloading, first, the hose 8
Are connected and connected between a discharge port 6 of a predetermined tank chamber 3 and a receiving port 12 of a loading tank such as a gas station 11. And the unloading tank room designation means 5
At 8, one of the tank chambers 3 to be unloaded is selected and designated. In the illustrated example, one end of the hose 8 is connected to the discharge port 6 of a certain tank chamber 3, so that The tank room 3 is automatically designated as the tank room 3 to be unloaded. At the same time, the liquid type to be actually unloaded is specified by the unloading liquid type specifying means 59, for example, a bar code reader. Three such designations are implemented,
Accordingly, the loading liquid type information of the tank chamber 3 specified by the unloading tank chamber specifying unit 58 by the loading liquid type specifying unit 57 and the unloading liquid type information by the unloading liquid type specifying unit 59 match. Only in this case, the control means 39 opens the control valve 39 of the lock device 31 of the tank chamber 3.

As described above, the control device 32 controls the lock device 31. Then, regarding the tank chamber 3 in which the control valve 39 is opened, the cylinder 37 of the lock device 31
When the piston rod 46 is driven forward by the air pressure from the drive source 38 and the piston 35 advances, the stopper 35 is pushed against the urging force of the spring 36 from the lock position B of the stopper receiver 34 on the handle 7 to lock the upper position. It is displaced to the release position C (see FIGS. 1, 2 and 3). Therefore,
By rotating the handle 7 from the closed position A to the open position D (see FIG. 4), the discharge valve V of the tank chamber 3 is switched from closed to open, and unloading is started (of course, the unloading is started). At this time, the bottom valve 4 is also switched from closed to open by operating the lever 15 in advance). That is, unloading is performed from the tank chamber 3 to the receiving tank such as the gas station 11 via the bottom valve 4, the discharge pipe 5, the discharge valve V, the discharge port 6, the hose 8, the receiving port 12, and the like. Is started.

When the unloading is completed, the discharge valve V is switched from open to closed by rotating the handle 7 from the open position D to the closed position A (see FIGS. 4 and 2 and 3). . Then, the unloading tank chamber designating means 58 of the control device 32 is canceled by disconnecting the hose 8 from the discharge port 6, for example, so that the designation is canceled. The control valve 39 is switched from open to closed, the air in the pipe 51 reaching the cylinder 37 is released from the control valve 39 to the atmosphere, the cylinder 37 is deactivated, and the piston rod 46 is retracted. Accordingly, the biasing force of the spring 36 causes the stopper 35 of the lock device 31 to be displaced from the upper lock release position C to the lower lock position B at all times, and the engagement hole 41 of the stopper receiver 34 to move. Is inserted. Therefore, the closed position A
Is locked by the stopper 35 of such a lock device 31 (see FIG. 1). Then, in the liquid mixture prevention device 30 of the tank truck 1, the following first, second, third, and fourth are performed.

First, in the liquid mixture prevention device 30, the loaded liquid type information of the tank chamber 3 to be unloaded and the unloaded liquid type information obtained from the gas station 11, for example, match. Only when the control device 32
The lock of the tank chamber 3 by the lock device 31 is released. That is, the stopper 35 of the lock device 31 is displaced from the lock position B of the stopper receiver 34 and the handle 7 for opening and closing the discharge valve V to the upper lock release position C, and the handle 7 is moved from the previously closed position A. Rotational operation is possible at the open position D, that is, the discharge valve V can be opened. On the other hand, if the information does not match, that is, if the loaded liquid type information does not match the unloading liquid type information, the lock by the lock device 31 is continued as it is. That is, the stopper 35 of the lock device 31 maintains the stopper position 34 and the lock position B of the handle 7 for opening and closing the discharge valve V, the handle 7 continues to be locked at the closed position A, and the turning operation to the open position D is performed. Impossible
That is, the discharge valve V is kept closed and cannot be opened. Therefore, the loading liquid type different from the unloading liquid type is
It is surely prevented that the cargo is unloaded and mixed into the receiving tank.

Second, the liquid mixture preventing device 30 has a stopper receiver 34 attached to the handle 7 side, a stopper 35, a spring 36 for positioning the stopper 35, and a cylinder 3
7, a lock device 31 provided with the control valve 39 and the like, and a control device 32 provided with the loading liquid type specifying means 57, the unloading tank chamber specifying means 58, the unloading liquid type specifying means 59, the control means 56 and the like. , A relatively simple configuration. Then, the loading liquid type specifying means 57 and the unloading liquid type specifying means 59
The above-mentioned first point can be easily realized only by manually operating the above. Particularly in the illustrated example, the unloading tank room designation means 5
8 is attached to each discharge port 6 of each tank chamber 3, and by detecting which of the tank chambers 3 is connected with the hose 8, the tank chamber 3 to be unloaded is automatically detected. Since it is specified, the operation is simplified and correspondingly simplified.

Third, the unloading tank room specifying means 58 of the control device 32 in the illustrated example specifies the tank room 3 to be unloaded by detecting the connection of the hose 8 to the discharge valve 6 as described above. It has become. Therefore, unless the hose 8 is connected to the discharge port 6, the designation of the tank chamber 3 by the unloading tank chamber designation means 58 of the control device 32 is not performed, and the control means 56 sends a control signal to open the control valve 39. Therefore, the cylinder 37 is not driven, and the lock by the lock device 31 is maintained. That is, the stopper 35 of the lock device 31 maintains the stopper receiver 34 and the locked position B of the handle 7, the handle 7 is locked at the closed position A, and the discharge valve V is kept closed. As described above, since the possibility of opening the discharge valve V does not occur unless the hose 8 is actually connected at the time of unloading, it is possible to prevent the discharge valve V from being opened without connecting the hose 8 by mischief. Is done.

Fourth, in the illustrated example, the locking device 31
Takes the unlocked position C and the handle 7
Is unlocked and rotated from the closed position A to the open position D, and after unloading is started, the control device 32 and the lock device 31 malfunction and the stopper 35 is displaced to the lock position B. Even in the case where the discharge valve V is closed, the discharge valve V can be easily closed by the inclination 61 formed outside the stopper receiver 34. That is, in this case, by rotating the handle 7 from the open position D to the closed position A, the inclination 61 comes into contact with and pushes the upper stopper 35 to once move the stopper 35 from the lock position B. Displace to the unlock position C side. When the handle 7 is turned to the closed position A to close the discharge valve V, the stopper 35 is moved to the lock position B by the urging force of the spring 36.
And the handle 7 is locked at the closed position A by being inserted into the engagement hole 41 of the stopper receiver 34.

[0050]

As described above, the apparatus for preventing liquid mixture in a tank lorry according to the present invention comprises a stopper receiver attached to a handle for opening and closing a discharge valve, a stopper displaceable to a lock position and a lock release position, and A lock device including a spring for urging the stopper to the lock position, a cylinder for displacing the stopper to the unlock position, and a control valve for the cylinder is employed. It is used in combination with a control device provided with an unloading tank room specifying means, an unloading liquid type specifying means, a control means and the like. Further, in claim 2, the stopper receiver is provided with an engagement hole, and in claim 3, an unloading tank chamber specifying means is provided for each discharge port to detect the connection of the hose. A predetermined inclination is formed outside the engagement hole of the stopper receiver. Therefore, the present invention exhibits the following effects.

First, oil mixing accidents and liquid mixture accidents are reliably prevented. That is, in this tank lorry mixture prevention device, only when the loaded liquid type information about the tank room scheduled to be unloaded and the unloading liquid type information that should be actually unloaded to the receiving tank match, The lock of the lock device is released by the control device, and the handle for opening and closing the discharge valve can be turned to the open position, that is, the discharge valve can be opened. On the other hand, if the information does not match, that is, if the loaded liquid type information and the unloading liquid type information do not match, the lock by the lock device is maintained by the control device, and the handle for opening and closing the discharge valve is locked at the closed position. Therefore, the rotation operation to the open position is impossible, that is, the discharge valve cannot be opened. Therefore, a different loading liquid type that does not match the unloading liquid type may cause visual errors, incorrect memories,
Occurrence of an oil mixture accident and a liquid mixture accident that is unloaded and mixed into a receiving tank of a gas station or the like due to a work mistake, an operation mistake, or the like is reliably prevented.

In particular, in an independent piping type tank lorry, a hose is connected to a discharge port of a tank room to be unloaded which is loaded with a liquid type to be unloaded without a connection error, and a discharge valve of the tank room is connected. Unloading can be performed only when the opening / closing handle is pulled without a rotation operation error. In other words, a wrong connection of a hose to the discharge port of another adjacent tank chamber loaded with a liquid type different from the liquid type to be unloaded In the case of a rotation operation error in which the handle for opening and closing the discharge valve of the chamber is accidentally pulled, unloading is impossible, and an oil mixing accident and a liquid mixing accident are reliably prevented.

Second, and this is easily and easily realized. That is, the liquid mixture preventing device of the tank lorry includes a lock device having a stopper receiver, a stopper, a spring, a cylinder, a control valve, and the like, a loading liquid type specifying unit, an unloading tank chamber specifying unit, an unloading liquid type specifying unit, and a control unit. It is composed of a control device provided with means and the like, and has a simple configuration. So,
The first point described above is easily realized.

Further, in addition to the above-described first and second aspects, the following effects are exhibited. Third, it is possible to avoid opening the discharge valve other than when the hose is connected. That is, the unloading tank chamber specifying means of the control device specifies the tank chamber to be unloaded by detecting the hose connection to the discharge port, so that unless the hose is connected to the discharge port, the unloading tank chamber specifying means. The tank room was not specified, the control means did not work,
The locking device maintains the lock. As described above, since the discharge valve cannot be opened unless the hose is connected, mischief is prevented. That is, tampering of opening and closing the discharge valve by maliciously rotating the opening / closing handle without connecting the hose is prevented, which is also safe.

According to the fourth aspect, the following effects are exhibited in addition to the first and second aspects. Fourth, it is possible to easily cope with a malfunction after the discharge valve is opened. That is, after the stopper is in the unlock position and the handle is turned to the open position to open the discharge valve, if the control device or the lock device malfunctions, the stopper is displaced to the lock position. In this case, when the handle is turned to the closed position, the inclination of the outside of the engagement hole of the stopper receiver of the lock device comes into contact with and pushes the stopper, and is once displaced to the unlock position. When the handle is rotated to the closed position to close the discharge valve, the stopper is returned to the locked position by the biasing force of the spring, is inserted into the engagement hole, and the handle is locked. In this manner, the discharge valve can be easily and manually closed even in the case of a malfunction during unloading. As described above, the effects exhibited by the present invention are remarkably large, for example, all the problems existing in this type of conventional example are solved at once.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a lock device and the like for a tank lorry mixture prevention device according to an embodiment of the present invention, showing a state in which a handle is in a closed position and a stopper is in a locked position. Show.

FIG. 2 is a front sectional view of a lock device and the like for explaining the embodiment of the present invention, showing a state where a handle is at a closed position and a stopper is at a lock release position.

FIG. 3 is a side view of the lock device and the like for explaining the embodiment of the present invention, showing a state where a handle is at a closed position and a stopper is at a lock release position.

FIG. 4 is a side view of the lock device and the like for explaining the embodiment of the present invention, showing a state in which a handle is in an open position and a stopper is in a lock release position.

5A and 5B are views for explaining the embodiment of the present invention, showing a stopper receiver of the lock device, and FIG.
(2) The figure is a perspective view.

FIG. 6 is an explanatory front view of a lever for opening and closing a bottom valve, and the like, for explaining the embodiment of the present invention;

FIG. 7 is an explanatory front view of the control device and other components for explaining the embodiment of the invention.

FIG. 8 is a block diagram of a control device for explaining the embodiment of the present invention;

FIG. 9 is a perspective view of a tank lorry used for describing the embodiment of the present invention.

FIG. 10 is an explanatory side view of the tank truck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank lorry 2 Tank 3 Tank room 4 Bottom valve 5 Discharge pipe 6 Discharge port 7 Handle 8 Hose 30 Liquid mixture prevention device 31 Lock device 32 Control device 34 Stopper receiver 35 Stopper 36 Spring 37 Cylinder 38 Drive source 39 Control valve 41 Engagement hole 56 control means 57 loading liquid type specifying means 58 unloading tank chamber specifying means 59 unloading liquid type specifying means 61 slope A closed position B lock position C unlock position D open position V discharge valve

Claims (4)

[Claims] 1. The tank is divided into a plurality of tank chambers,
Bottom valve, discharge pipe, discharge valve,
A discharge port and the like are provided in order, and a handle for opening and closing the discharge valve is provided. By rotating the handle from the closed position to the open position, the bottom valve, the discharge pipe,
After passing through a discharge valve, a discharge port, etc., in a tank lorry where unloading is performed via a hose connected to the discharge port, a liquid type different from the liquid type to be actually unloaded is unloaded. A lock device and a control device, wherein the lock device is provided with a stopper receiver fixedly mounted on a discharge valve opening / closing handle of the tank chamber, and the handle A stopper displaceable between a locked position and an unlocked position of the stopper receiver in the closed position of the stopper, a spring for constantly biasing the stopper to the locked position, and locking the stopper by driving against the biasing force of the spring. And a control valve interposed between the cylinder and a drive source for driving and releasing the cylinder by opening and closing. The control device includes a loading liquid type designation unit that is manually operated to designate a liquid type such as regular gasoline, high-octane gasoline, kerosene, or light oil loaded in each of the tank chambers, and an actual unloading schedule. An unloading tank chamber designating means for designating the tank chamber, an unloading liquid type designating means for designating a liquid type to be actually unloaded, and a control means, wherein the control means comprises: The loaded liquid type information of the tank chamber specified by the tank chamber specifying means is compared with the loaded liquid type information by the loaded liquid type specifying means and the unloaded liquid type information by the unloaded liquid type specifying means. Only in this case, the control valve of the lock device of the tank chamber is opened, and the cylinder of the lock device of the tank chamber is driven to displace the stopper from the normally locked position to the unlocked position. Tank lorry Mixture prevention device. 2. The liquid mixing prevention device for a tank lorry according to claim 1, wherein the locking device has the spring built into the cylinder, the stopper receiving portion provided with an engaging hole, and the stopper being provided with the stopper receiving portion. A liquid mixing prevention device for a tank lorry, characterized in that the device has a shape that can be inserted into the engagement hole. 3. The apparatus according to claim 1, wherein said unloading tank chamber specifying means of said control device is provided for each of said discharge ports, and connects said hose to said discharge port. A tank lorry liquid mixture prevention device, wherein the detection specifies the tank chamber where the unloading is to be performed. 4. The liquid mixing prevention device for a tank lorry according to claim 2, wherein an inclination is formed outside an engagement hole of a stopper receiver of the lock device, and the inclination is such that the stopper is at a lock position. In addition, when the handle is rotated from the open position to the closed position, the handle can be brought into contact with and pushed by the stopper to temporarily displace the stopper to the unlocking position side, and afterwards, A liquid mixing prevention device for a tank lorry, wherein the device has a guide shape capable of returning the stopper to a lock device fitted in the engagement hole by the biasing force of the spring.