JPH053190U - Oil supply device in tank truck - Google Patents

Abstract

(57) [Summary] [Structure] The main oil supply pipe 2 is linearly arranged along the inclined tank bottom of the tank truck, and the bottom valves 5 with the emergency cutoff valves 4 provided at appropriate intervals are provided on the bottom of the tank. A forced oil feed pipe 9 and a natural outflow pipe 7 are connected to the oil feed main pipe 2 respectively, and a three-way switching valve 6 is interposed between the forced oil feed pipe 9 and a natural outflow pipe 7. [Effect] Since the main oil supply pipe 2 is provided in a linearly inclined manner, the cleaning liquid does not remain inside the main oil supply pipe 2 and the three-way switching valve 6 shuts off the forced oil supply pipe 9 so that Since the oil naturally flows out through the natural outflow pipe 7, the oil does not flow into the oil feed pump 8 to be frozen or chemically changed to be solidified.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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]

[Prior Art]

 Conventionally, an apparatus of this type is disclosed in Japanese Utility Model Laid-Open No. 57-52337. 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 and connected, and the oil supply direction is switched to the oil supply pipe. With an oil feed pump with a valve interposed, by making the oil feed direction switching valve in a neutral state, the oil in the tank spontaneously flows out, and by switching the valve to the oil discharge side, By forcibly discharging the oil in the tank to the outside with an oil feed pump and switching the valve to the oil filling side, the oil can be forcibly filled in the tank with the oil feed pump.

[0003]

[Problems to be solved by the device]

 In the above conventional oil sending device, since the oil sending pipe is horizontally arranged in a complicated manner, the cleaning liquid for cleaning the inside of the tank and the oil sending pipe is likely to remain, which causes the oil filled in the tank. There is a possibility that the residual cleaning liquid may be mixed in with and deteriorate the quality.

Further, since the oil naturally flows out through the oil supply direction switching valve, when the seal material provided between the oil supply direction switching valve and the oil supply pump is worn and deteriorated, the oil is There was a risk of leaking into the oil pump and freezing, or causing chemical changes to solidify and damage the oil pump.

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

[0006]

[Means for Solving the Problems]

 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 provided with a slight downward slope from the front to the rear. At the same time, the main oil supply pipe 2 is linearly arranged in the longitudinal direction of the tank lorry T along the inclined tank bottom 1a, and the bottom valves 5 with the emergency shutoff valves 4 provided at appropriate intervals are provided on the tank bottom 1a. The oil feed main pipes 2 are connected to each other, 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 one of the branch pipes is A forced oil feed pipe 9 with an oil feed pump 8 interposed in the branch pipe is used as a forced outflow pipe 7 without providing an oil feed pump in the other branched pipe, and the forced oil feed pipe is provided via the three-way switching valve 6. Distribution only between 9 and natural outflow pipe 7 It is obtained by arranged to be capable of switching the power.

[0007]

[Action]

 In the above configuration, by shutting off the forced oil supply pipe 9 with the three-way switching valve 6, the oil in the tank 1 can be naturally discharged to the outside through the natural outflow pipe 7, and the three-way switching valve 6 can naturally flow out. By shutting off the pipe 7, it is possible to forcibly discharge the oil in the tank 1 to the outside or to forcibly fill the oil in the tank 1 with the oil feeding pump 8 interposed in the forced oil feeding pipe 9. By connecting the main oil supply pipe 2, the forced oil supply pipe 9 and the natural outflow pipe 7 to each other by the three-way switching valve 6, the oil in the tank 1 can be forcibly discharged at the same time as the natural outflow. By shutting off the main oil supply pipe 2 with, the flow is switched between the forced oil supply pipe 9 and the natural outflow pipe 7, and the oil supply pump 8 is operated to, for example, another tank truck where the oil supply device has failed. Transfer the oil inside to another tank truck Rukoto can.

[0008]

【Example】

 FIG. 1 shows a tank truck T which is an embodiment of the present invention, and FIG. 2 shows an oil feeding device which is a main part of the tank lorry T. As is apparent from these figures, the bottom portion 1a of the tank 1 is from front to back. The main oil feeding pipe 2 is linearly arranged in the longitudinal direction of the tank lorry along the inclined bottom portion 1a, and the inside of the tank 1 is partitioned by the partition wall 3. A bottom valve 5 with an emergency shutoff valve 4 attached to the bottom 1a of each compartment is connected to the main oil supply pipe 2 in communication therewith, and at the rear end of the tank 1, the rear end of the main oil supply pipe 2 is connected. A pair of oil feeding branch pipes are connected to the section via a three-way switching valve 6, one of the branch pipes is a natural outflow pipe 7, and the other branch pipe is an oil feeding pump 8 with an oil feeding direction switching valve 12. It is said to be the forced oil supply pipe 9 that is interposed, and its nature Extraction pipe 7 and forced the oil extraction pipe oil pipeline 9 of the order to connect (not shown) open end 7a, respectively opening and closing valve 10, 11 is provided 9a.

Explaining the three-way switching valve 6, as shown in FIGS. 3 and 4, the openings 13a, 13b, 13c provided on the upper and both sides of the three-way switching valve 6 are the main oil feeding pipe 2, the natural outflow pipe 7, and the forced feeding pipe 7. Inside the cylindrical casing 13 connected to the oil pipe 9 respectively, an arc-shaped valve body 14 having an arc-shaped outer peripheral surface 14a in contact with the inner surface of the casing 13 is disposed, and the casing 13 is opposed to the valve body 14. A valve shaft 15 is rotatably disposed in the central portion of the inside of the valve body, and the tip end portion is inserted into and removable from a plurality of recesses 16 formed in the flat outer peripheral surface 14b of the valve body 14, respectively. The base end of the rod 17 is screwed to the valve shaft 15, and the valve disc 14 is fitted between the stopper ring 18 fitted on each valve disc support rod 17 and the flat outer peripheral surface 14b of the valve disc 14. Bias towards the inner surface of 13. 19 is intervening. The valve shaft 15 is rotatably supported by a bag-shaped bearing portion 20 integrally formed at one end of the casing 13 and an end plate portion 21 integrally connected to the other end of the casing 13, and the end plate portion 21 is provided. An oil-tight packing 22 is interposed between and the valve shaft 15.

According to the three-way switching valve 6, since the arcuate outer peripheral surface 14a of the valve body 14 is constantly pressed against the inner surface of the casing 13 by the spring 19, even if the arcuate outer peripheral surface 14a is worn, Oil tightness can be reliably maintained for a long period of time.

The oil feed pump 8 with the oil feed direction switching valve 12 will be described. As shown in FIGS. 5 and 6, openings 25a and 25b communicating with the forced oil feed pipe 9 are provided on both side surfaces and the lower surface thereof. A valve body 26 having a substantially U-shaped vertical cross section is rotatably disposed in a casing 25 having openings 25c and 25d communicating with the discharge port 8a and the suction port 8b of the oil pump 8, respectively. At the same time, 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, and the operating rod 27 is integrally connected to the valve body 26. It is a thing. 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 valve body 14 of the three-way switching valve 6 shuts off the forced oil feeding pipe 9 to connect the oil feeding main pipe 2 and the natural outflow pipe 7 to each other. The oil in the tank 1 can be naturally discharged to the outside. 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, descends slightly from the front to the rear. By sloping to a slope, the natural outflow of oil can be carried out more smoothly. Further, since the forced oil feeding pipe 9 is shut off by the valve body 14, there is no risk of oil flowing into the oil feeding pump 8 and freezing, or causing chemical change to solidify.

Further, as shown in FIG. 8, when the natural outflow pipe 7 is shut off by the valve body 14 of the three-way switching valve 6 and the main oil supply pipe 2 and the forced oil supply pipe 9 are communicated with each other, the oil supply direction switching valve When the valve body 26 of No. 12 is set to the oil discharge position (solid line state in FIG. 5 and FIG. 6), the oil in the tank 1 is transferred from the forced oil pipe 9 on the left side to the valve body 26 as shown by the solid line arrow in FIG. It is sucked into the oil feed pump 8 through the flow passage 26a and is discharged to the outside through the forced oil feed pipe 9 on the right side. When the valve body 26 of the oil feeding direction switching valve 12 is set to the oil filling position (state of phantom line in FIG. 6), the external oil is the right-side forced feed pipe as shown by the arrow in phantom line in FIG. 9 is sucked into the oil feed pump 8 through the flow passage 26a of the valve body 26, and is filled in the tank 1 through the left forced oil feed pipe 9.

Further, as shown in FIG. 9, the valve body 14 of the three-way switching valve 6 is located at the bottom of the casing 13 so that the oil feed main pipe 2, the natural outflow pipe 7 and the forced oil feed pipe 9 communicate with each other. As a result, the oil in the tank 1 can be naturally discharged and at the same time, can be forcibly discharged by the oil feed pump 8.

Further, as shown in FIG. 10, the valve body 14 of the three-way switching valve 6 shuts off the main oil supply pipe 2 so that oil can flow only between the natural outflow pipe 7 and the forced oil supply pipe 9. 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), for example, as shown in FIG. 11, in another tank truck t ₁ in which the oil feeding device has failed. The oil can be transferred to another tank lorry t ₂ via the oil supply hose 30 connected to the openings 7a, 9a, and vice versa, the valve body 26 of the oil supply direction switching valve 12 is moved to the oil discharge position (Fig. 5 and the solid line state in FIG. 6), the oil can be transferred from another tank lorry t ₂ to another tank lorry t ₁ .

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. According to this, there is an advantage that the pump can be easily disassembled and can be precisely washed.

The bottom valve 5 will be described. As shown in FIG. 12, a valve seat 32 is fixed on the tank bottom portion 1a so as to face a through hole 31 penetrating at a predetermined position of the tank bottom portion 1a and the valve seat 32 is fixed. A valve body 35 is attached to a lower end portion of a screw shaft 34 that is screwed into a screw hole of a casing 33 provided on the seat 32, and an operating shaft 36 with a handle 36a that vertically penetrates the tank 1 (see FIGS. 1 and 2). The screw shaft 34 is connected to the lower end of the valve 1 and the operating shaft 36 is rotated forward and backward from the top of the tank 1 to separate the valve body 35 from the valve seat 32 by pressing and separating the valve shaft 35. 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. 12, the bottom valve 5 and the communication ports 39a, 39b communicating with the main oil supply pipe 2 are provided on the upper surface and one side surface of the casing 39. 2, the operating rod 41 fixed to the base end portion of the valve shaft 40 is connected to the protrusion 43a of the rotating shaft 43 which is reciprocally rotated by a predetermined angle by the emergency operating lever 42 through the connecting member 44, as shown in FIG. Since the other configurations are almost the same as those of the three-way switching valve 6 described above, 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 operation lever 42 is pulled from the state shown by the solid line in FIG. 12, the valve body 14 is rotated 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 body 14 is located at the bottom of the casing 39, oil can be smoothly circulated, and after the oil in the tank 1 is discharged, the tank 1 The cleaning liquid for cleaning the inside and the main oil supply pipe 2 does not remain at the bottom of the casing 39.

[0021]

[Effect of the device]

 According to the present invention, the tank bottom of the tank lorry is provided with a slight downward inclination from the front to the rear, and the main oil supply pipe is linearly arranged in the longitudinal direction of the tank along the inclined tank bottom. Since it is installed, even if the bottom of the tank is slightly bent due to manufacturing error or the weight of oil in the tank, the cleaning liquid that has cleaned the inside can be reliably discharged from the tank without remaining. Of course, since the main oil supply pipe is also 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 to improve the quality. It is possible to eliminate the drawback of lowering, 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 be transferred to the above oil supply pump. There is no fear that it will flow in and freeze, or will undergo a chemical change to solidify and will hinder the oil pump.

Further, since it can be switched so as to be flowable only between the forced oil supply pipe and the natural outflow pipe through the three-way switching valve, for example, in another tank in which the oil supply device has failed, It is also possible to transfer the oil to another tank lorry.

Further, since the operation of the three-way switching valve and the attachment / detachment of the oil take-out pipe with respect 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, the oil loading and unloading work can be performed 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 an oil feed main pipe, a natural outflow pipe, and a forced oil feed 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 cutoff valve used in the oil sending apparatus.

[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)

[Claims for utility model registration] 1. The tank bottom of the tank lorry is provided with a slight downward slope from the front to the rear, and the main oil feed pipe is provided along the inclined tank bottom in the longitudinal direction of the tank lorry. And a bottom valve with an emergency shutoff valve provided at appropriate intervals on the bottom of the tank are connected to the main oil supply pipe, and at the rear end of the tank, a three-way switching valve is connected to the main oil supply pipe. A pair of oil feed branch pipes are connected via the oil feed pipe, and one of the branch pipes is a forced oil feed pipe with an oil feed pump interposed in the branch pipe, and the other branch pipe is not provided with an oil feed pump. An oil supply device in a tank lorry which is a natural outflow pipe and can be switched so as to be flowable only between the forced oil supply pipe and the natural outflow pipe via the three-way switching valve.