JPH0810565Y2 - Oil supply device in tank truck - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil feeding device for discharging oil such as oil, chemical liquid and gasoline filled in a tank of a tank truck to the outside or filling the tank with oil from the outside. .

[0002]

2. Description of the Related Art Conventionally, as an apparatus of this kind, a full-scale exploitation model 57-5 was used.
There is one described in Japanese Patent No. 2337. This is because the oil supply pipe is horizontally arranged along the bottom of the tank truck, and the oil supply pipe and each bottom valve provided for each compartment in the tank are connected to each other to switch the oil supply direction to the oil supply pipe. By interposing an oil feed pump with a valve, by setting the oil feed direction switching valve in a neutral state, the oil in the tank is allowed to flow out to the outside, and the valve is switched to the oil discharge side. By forcibly discharging the oil in the tank to the outside by the oil feeding pump and switching the valve to the oil filling side, the oil can be forcedly filled in the tank by the oil feeding pump.

[0003]

In the above-mentioned conventional oil feeding apparatus, since the oil feeding pipes are horizontally arranged in a complicated manner, the cleaning liquid for cleaning the inside thereof is likely to remain in the tank and the oil feeding pipes. Therefore, the residual cleaning liquid may be mixed in the oil filled in the tank, which may deteriorate the quality.

Further, in the conventional oil feeding device, the oil naturally flows out through the oil feeding direction switching valve, so that the seal material provided between the oil feeding direction switching valve and the oil feeding pump is worn and deteriorated. In that case, there is a risk that the oil may leak into the oil feed pump and freeze, or may undergo a chemical change to solidify and cause the oil feed pump to malfunction.

An object of the present invention is to provide an oil feeding device for a tank truck that solves the above problems.

[0006]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. According to the present invention, the tank bottom 1a of the tank truck T is moved from the front to the rear. The oil supply main pipe 2 is provided with a slight downward slope, and along the inclined tank bottom 1a.
Are arranged linearly in the longitudinal direction of the tank truck T, and the emergency shutoff valves 4 are provided on the tank bottom 1a at appropriate intervals.
The attached bottom valve 5 is connected to each of the oil feed main pipes 2, and at the rear end of the tank 1, a pair of oil feed branch pipes are connected to the oil feed main pipe 2 via a three-way switching valve 6 and The branch pipe is used as a forced oil feed pipe 9, and an oil feed pump 8 with an oil feed direction switching valve 12 is provided in the oil feed pipe 9. The other branch pipe is not provided with an oil feed pump and is used as a natural outflow pipe 7. The oil pipe 9 and the natural outflow pipe 7 are provided with open / close valves 11 and 10 on the respective open end sides thereof.

[0007]

[Action] In the above structure, thus to block the forced oil pipeline 9 by the three-way selector valve 6, the oil feed main pipe 2 natural outflow pipe 7
By opening the on-off valve 10 , the oil in the tank 1 can naturally flow out to the outside through the natural outflow pipe 7, and the on- off valve 10 can be opened and closed.
Therefore, the outflow amount can be adjusted and stopped. This
In the case of, is the three-way switching valve 6 shut off the forced oil supply pipe 9?
Oil flows into the oil feed pump 8 and freezes or chemical changes occur.
May solidify and solidify, causing the oil pump 8 to malfunction.
Absent. Also, if the natural outflow pipe 7 is shut off by the three-way switching valve 6,
In both cases, the oil supply direction switching valve 12 is appropriately operated to open the open / close valve 11
Is opened to forcibly discharge the oil in the tank 1 to the outside by the oil feed pump 8 interposed in the oil feed pipe 9.
The tank 1 can be forcibly filled with oil . Furthermore, oil supply main tube 2 in the three-way selector valve 6, dissipate communication with each other to force the oil feed tube 9 and the natural outflow pipe 7, applies the oil feeding direction switching valve 12
By appropriately operating and opening both the on-off valves 10 and 11 , the oil in the tank 1 can be forcibly discharged at the same time as the natural outflow . Furthermore , the oil feeding main pipe 2 is shut off by the three-way switching valve 6, and the oil feeding direction switching valve 12 is appropriately operated to make both
By opening the on-off valves 10 and 11 , for example , switching is made possible only between the forced oil feed pipe 9 and the natural outflow pipe 7, and the oil feed pump 8 is operated to, for example, another device in which the oil feed device has failed. it the oil in the tank truck can further as transferring to another tank lorry, or forced oil feed pipe
9 and a hose to each open end of the natural outflow pipe 7, respectively.
The ends of both hoses, such as drums containing cleaning liquid.
To rush into the container and operate the oil pump 8.
From the above, the cleaning liquid is the above-mentioned container, connection hose, forced oil supply pipe 9 and
And the natural outflow pipe 7 are circulated through the loop-shaped flow path to feed the oil.
It is also possible to carry out washing of 8 .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a tank truck T which is an embodiment of the present invention.
FIG. 2 shows an oil feeding device which is a main part of the tank. As is apparent from these drawings, the bottom portion 1a of the tank 1 is shown.
Is provided so as to be inclined downward from the front to the rear, the main oil supply pipe 2 is linearly arranged in the longitudinal direction of the tank truck along the inclined bottom portion 1a, and the inside of the tank 1 is a partition wall. The emergency shutoff valve 4 is divided by 3 and is attached to the bottom 1a of each compartment.
An attached bottom valve 5 is communicatively connected to the oil feed main pipe 2, and at the rear end of the tank 1, a pair of oil feed branch pipes is connected to the rear end of the oil feed main pipe 2 via a three-way switching valve 6, One of the branch pipes serves as a natural outflow pipe 7, and the other branch pipe serves as a forced oil feed pipe 9 with an oil feed pump 8 having an oil feed direction switching valve 12 interposed therebetween. 9, an open end 7a for connecting an oil take-out pipe (not shown) in FIG.
On-off valves 10 and 11 are provided on 9a, respectively.

Explaining the three-way switching valve 6, as shown in FIGS. 3 and 4, the openings 13a, 13b, 13c provided at the upper and both sides of the three-way switching valve 6 have the main oil feeding pipe 2, the natural outflow pipe 7 and the forced feeding pipe 7. An arcuate plate-shaped valve body 14 having an arcuate outer peripheral surface 14a in contact with the inner surface of the casing 13 is disposed inside a cylindrical casing 13 that is connected to the oil pipes 9 respectively, and the casing 13 is opposed to the valve body 14. A valve shaft 15 is rotatably disposed in the center of the inside of the valve shaft 14 and the tip of the valve shaft 15 is the same.
The base end portions of the respective valve body support rods 17 inserted into and removed from the plurality of recesses 16 formed in the flat outer peripheral surface 14b are screwed to the valve shafts 15 and are attached to the valve body support rods 17. The fitted stopper ring 18 and the flat outer peripheral surface 14b of the valve body 14
A spring 19 for urging the valve body 14 toward the inner surface of the casing 13 is interposed between and. The valve shaft 15 is
Bag-shaped bearing portion 20 integrally formed at one end of the casing 13.
And the end plate portion 21 integrally connected to the other end of the casing 13.
Is rotatably supported by the end plate portion 21 and the valve shaft 15
An oil-tight packing 22 is interposed between and.

According to the three-way switching valve 6 described above, since the arcuate outer peripheral surface 14a of the valve body 14 is constantly in pressure contact with the inner surface of the casing 13 by the spring 19, for example, the arcuate outer peripheral surface 1
Even if 4a is worn, the oil tightness can be reliably maintained for a long period of time.

Oil feed pump 8 with the oil feed direction switching valve 12
5, the openings 25a and 25b communicating with the forced oil feed pipe 9 are provided on both side surfaces, and the discharge port 8a and the suction port 8b of the oil feed pump 8 are provided on the lower surface thereof. A valve body 26 having a substantially U-shaped vertical cross section is provided in a casing 25 having openings 25c and 25d communicating with each other.
Is rotatably disposed, and the valve body 26 is provided with a flow passage 26a for selectively communicating the suction port 8b with the left and right forced oil supply pipes 9, 9 or the discharge port 8a.
The operating rod 27 is integrally connected to the. Reference numeral 29 is a pressure adjusting valve for allowing the high pressure oil on the discharge port 8a side to escape to the suction port 8b side.

Explaining the procedure of oil feeding, as shown in FIG. 7, the forced oil feeding pipe 9 is shut off by the valve body 14 of the three-way switching valve 6,
By communicating the natural outflow pipe 7 and the oil feeding main 2, open
As long as you do not close the valve closing 10, the oil in the tank 1, Okuaburanushi
Natural outflow from the pipe 2 through the natural outflow pipe 7 is possible, and by opening and closing the on-off valve 10, that flow
The output can be adjusted and stopped. In this case, as shown in FIGS. 1 and 2, the natural outflow pipe 7 is arranged on an extension line of the main oil supply pipe 2 and, like the main oil supply pipe 2, has a slight downward slope from the front to the rear. If you tilt it to
Natural oil spill can be performed more smoothly. Further, since the valve body 14 shuts off the forced oil-feeding pipe 9, there is no risk that the oil will flow into the oil-feeding pump 8 and freeze, or will undergo a chemical change and solidify.

[0013] As shown in FIG. 8, by blocking the natural outlet pipe 7 in the valve body 14 of the three-way valve 6, and the state in which the communication between the oil feed main 2 and forced oil pipeline 9, and on-off valve Open 11
When the valve body 26 of the oil feed direction switching valve 12 is brought to the oil discharge position (solid line state in FIG. 5 and FIG. 6) by releasing ,
As shown by solid line arrow in FIG. 6, the oil tank 1 from the left side of the forced oil pipeline 9 is sucked into the oil feeding pump 8 through the flow passage 26a of the valve body 26, through the right side of the forced oil pipeline 9 That
It is discharged from the open end . Then, the valve body 26 of the oil feeding direction switching valve 12 is set at the oil filling position (state of phantom line in FIG. 6).
6, the external oil flows from the right forced oil supply pipe 9 to the flow passage 26 of the valve body 26, as shown by an imaginary line arrow in FIG.
It is drawn into the oil feed pump 8 through a and is filled in the tank 1 via the forced oil feed pipe 9 on the left side.

[0014] As further shown in FIG. 9, the valve body 14 of the three-way valve 6 is positioned on the bottom of the casing 13, the oil feeding main 2, to communicate with each other natural outflow pipe 7 and forced oil pipeline 9
And opening both on-off valves 10 and 11 ,
At the same time as the oil in the tank 1 spontaneously flows out, the oil feed pump 8
Can be forcibly discharged with.

Further, as shown in FIG. 10, the oil feed main pipe 2 is shut off by the valve body 14 of the three-way switching valve 6 so that the oil can flow only between the natural outflow pipe 7 and the forced oil feed pipe 9. With
By setting the valve body 26 of the oil feeding direction switching valve 12 to the oil filling position (state of phantom line in FIG. 6) and opening both on-off valves 10 and 11 , for example, as shown in FIG. The oil in another tank lorry t ₁ in which the oil supply device has failed is opened in the openings 7a, 9a.
Through the oil feeding hose 30 connected can be further transferring to another tank lorry t _2, the addition oil discharge position the valve element 26 in the oil feed direction switching valve 12 to the reverse (solid line state of FIG. 5 and FIG. 6 by the), and also such as transferring the oil to the other tank lorry t ₁ from another tank truck t ₂
Although not shown, the three-way switching valve 6 is shown in FIG.
In the state shown in, the forced oil supply pipe 9 and the natural outflow pipe 7
Connect a connection hose to each opening end and
Insert the tip of the spout into a container such as a drum that contains the cleaning liquid.
Then, to be operated the oil transfer pump 8 in this state
The cleaning liquid is the above-mentioned container, connection hose, forced oil supply pipe 9 and
It circulates through the loop-shaped flow path of the natural outflow pipe 7 and thereby sends it.
The oil pump 8 can be washed .

Further, when the valve body 26 of the oil feed direction switching valve 12 is set to the neutral position (not shown) and the flow passage 26a of the valve body 26 is communicated with the discharge port 8a, the oil inside the oil feed pump 8 is Are circulated in the oil feed pump 8.

As the oil feed pump 8, a general pump may be used, but it is preferable to use a decomposition type sanitary pump. This has the advantage that the pump can be easily disassembled for precision cleaning.

The bottom valve 5 will be explained. As shown in FIG. 12, a valve seat 32 is fixed on the tank bottom 1a so as to face a through hole 31 penetrating at a predetermined position of the tank bottom 1a, and the valve is also fixed. The valve body 35 is attached to the lower end of the screw shaft 34 that is screwed into the screw hole of the casing 33 provided on the seat 32.
The screw shaft 34 is attached to the lower end of an operation shaft 36 (see FIGS. 1 and 2) with a handle 36a that penetrates the tank 1 in the vertical direction.
Which is connected to the operation shaft 3 from the top of the tank 1.
By rotating 6 normally and reversely, the valve element 35 can be pressed into contact with and separated from the valve seat 32, and the bottom valve 5 can be opened and closed.
Reference numeral 37 is a dust removing filter arranged in the side opening 33a of the casing 33.

The emergency shutoff valve 4 attached to the bottom valve 5 will be described. As shown in FIG.
The operation lever 41 fixed to the base end portion of the valve shaft 40 is formed in the emergency operation as shown in FIG. 2 by forming communication ports 39a and 39b communicating with the bottom valve 5 and the main oil supply pipe 2 on the upper surface and one side surface of the valve shaft 40. It is connected to a protrusion 43a of a rotary shaft 43 which is reciprocally rotated a predetermined angle by a lever 42 via a connecting member 44,
Since the other configurations are almost the same as those of the above-described three-way switching valve 6, the same parts are designated by the same reference numerals and the description thereof will be omitted.

According to the emergency shutoff valve 4, when the emergency operating lever 42 is pulled from the state shown by the solid line in FIG. 12, the valve body 14 rotates as shown by the phantom line in FIG. Can be immediately shut off to prevent the oil in the tank 1 from flowing out. In addition, at all times, as shown by the solid line in FIG. 12, since the valve element 14 is located at the bottom of the casing 39, the oil can be smoothly circulated, and after the oil in the tank 1 is discharged, the tank 1 is discharged. The cleaning liquid for cleaning the inside and the inside of the oil feed main pipe 2 does not remain at the bottom of the casing 39.

[0021]

EFFECTS OF THE INVENTION According to the present invention, the tank bottom of the tank lorry is provided with a slight downward slope from the front to the rear, and the main oil supply pipe is linear along the inclined tank bottom in the longitudinal direction of the tank lorry. Even if the bottom of the tank is bent to some extent due to manufacturing errors or the weight of oil in the tank, the cleaning liquid that has washed the inside of the tank can be reliably discharged without remaining. In addition, since the main oil supply pipe is naturally inclined, the cleaning liquid does not remain in the main oil supply pipe, and the residual cleaning liquid, which has been a problem in the past, mixes with the oil filled in the tank. It is possible to eliminate the disadvantage that the quality is deteriorated, and it is remarkably excellent in cleanability.

Further, since the oil in the tank can be naturally discharged through the natural outflow pipe in a state in which the forced oil supply pipe with the oil supply pump interposed is shut off by the three-way switching valve, the oil can flow to the oil supply pump. There is no fear that it will flow in and freeze, or it will undergo a chemical change and solidify to damage the oil pump.

A three-way switching valve is used to connect the main oil supply pipe, the forced oil supply pipe, and
And the natural outflow pipe are in communication with each other
The oil inside can be forcibly discharged at the same time as the natural spill.
At two points (for example, 2
Oil can be discharged and supplied simultaneously to one container).
In addition, a large amount of oil needs to be supplied to one place, and the other
Suitable for places where only a small amount of oil is needed
is there. Furthermore, by shutting off the main oil supply pipe with a three-way switching valve
Ri, only has to be able to be switched can flow between the forced feed oil pipe and natural outflow pipe, for example oil feeding device such that transferring the oil further tank truck in another tank truck failed You can do it, and vice versa
Note: Oil from another tank truck to the other tank truck.
Can be changed, or forced oil transfer
Hose connected to each open end of pipe and natural outflow pipe
The ends of both hoses with a container such as a drum containing cleaning liquid.
By rushing into the container and operating the oil pump.
Therefore, the oil pump can be washed .

Furthermore, since the operation of the three-way switching valve and the attachment / detachment of the oil take-out pipe to the open ends of the natural outflow pipe and the forced oil feed pipe can be intensively performed from the rear of the tank, oil loading and unloading work can be carried out quickly. In addition to being able to perform the maintenance, maintenance of the oil feed pump and the like can be easily performed from the rear of the tank.

[Brief description of drawings]

FIG. 1 is a side view of a tank truck according to an embodiment of the present invention.

FIG. 2 is a perspective view of an oil feeding device used in the tank truck.

FIG. 3 is a vertical cross-sectional view of a three-way switching valve used in the oil sending device.

FIG. 4 is a view on arrow AA of FIG.

FIG. 5 is a vertical cross-sectional view of a main part of an oil feed pump with an oil feed direction switching valve used in the oil feed device.

6 is a BB arrow view of FIG.

FIG. 7 is a schematic cross-sectional view of a forced oil supply pipe cutoff state by a three-way switching valve.

FIG. 8 is a schematic cross-sectional view of a natural outflow pipe blocked state by a three-way switching valve.

FIG. 9 is a schematic cross-sectional view of a communication state of a main oil supply pipe, a natural outflow pipe, and a forced oil supply pipe by a three-way switching valve.

FIG. 10 is a schematic cross-sectional view of a main oil supply pipe cutoff state by a three-way switching valve.

FIG. 11 is a schematic plan view showing another usage example of the oil feeding device.

FIG. 12 is a vertical cross-sectional view of a bottom valve with an emergency shutoff valve used in the oil sending device.

[Explanation of symbols]

 1 Tank 1a Bottom of Tank 1 Oil main pipe 4 Emergency shutoff valve 5 Bottom valve 6 Three-way switching valve 7 Natural outflow pipe 8 Oil pump 9 Forced oil pipe T Tank lorry

Claims (1)

[Scope of utility model registration request] 1. A tank bottom of a tank lorry is provided with a slight downward slope from the front to the rear, and a main oil supply pipe is linearly arranged in the longitudinal direction of the tank lorry along the inclined tank bottom. A bottom valve with an emergency shutoff valve provided at an appropriate interval on the bottom of the tank is connected to each of the oil feed main pipes, and at the rear end of the tank, a pair of oil feed branches is connected to the oil feed main pipe via a three-way switching valve. While connecting the pipes, one of the branch pipes is used as a forced oil feed pipe and an oil feed pump with an oil feed direction switching valve is provided on the oil feed pipe, and the other branch pipe is not provided with an oil feed pump and is a natural outflow pipe. , An oil feeding device in a tank truck provided with an on-off valve on each of the opening end sides of the forced oil feeding pipe and the natural outflow pipe.