JP2563450Y2 - Bottom loading type tank truck - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom loading type tank lorry. That is, the present invention relates to a bottom-loading tank lorry capable of unloading and loading via a pipe on the bottom valve side of the tank.

[0002]

2. Description of the Related Art As is well known, a bottom-loading tank lorry is far superior in terms of safety and workability as compared with a top-loading tank lorry in which loading is carried out from an injection hatch above a tank. By the way, as such a bottom-loading type tank truck, a so-called double-sided piping system shown in the rear view of FIG. 5 and a single-sided piping system shown in the back view of FIG. 6 can be considered. In the double-sided piping system shown in FIG. 5, a pipe 3 having one end connected to the tank 1 via the bottom valve 2 is provided.
The other end is connected to the discharge ports 4 located on the left and right sides under the tank 1 so that loading and unloading can be performed from both sides of the tank 1 as appropriate. On the other hand, in the one-sided pipe system shown in FIG. 6, one end of the pipe 5 connected to the tank 1 via the bottom valve 2 is connected to the discharge port 4 located only on one side below the tank 1. Loading and unloading are performed from only one side of the tank 1. Reference numeral 6 in FIGS. 5 and 6 denotes a protection frame for the pipes 3 and 5.

[0003]

The following problems have been pointed out in such a conventional bottom loading type tank lorry. That is, the volume at the time of measurement in this tank lorry includes not only the tank 1 but also the pipes 3 or 5, so that the amount of liquid to be loaded and unloaded is equal to the pipe 3 or 5 together with the inside of the tank 1. 5 including those in 5. So when unloading,
It is essential to have a structure that does not generate residual liquid that causes a measurement error. Therefore, when unloading on a slope, the residual liquid is easily generated in the pipe 3 on both sides.
Use was not allowed. In other words, as the bottom loading type tank lorry, only the one-sided pipe type shown in FIG. 6 has been approved for use because there is no risk of residual liquid being generated in the pipe 5 even on an inclined ground when unloading. FIG.
As described above, for example, in the case of unloading from the upper right discharge port 4 on the left sloping ground on the lower left, the pipe branched to the lower closed left discharge port 4 as described above. In No. 3, the remaining liquid which has not been unloaded is generated, which causes a measurement error, and its use has not been recognized conventionally. However, the bottom-loading type tank trolley with the double-sided piping method can load and unload the tank 1 from both sides or one of the two sides appropriately as compared with the single-sided piping type. In view of the condition of the equipment, it was convenient, easy to use and excellent in workability, and demand for its use was high.

The present invention has been made in view of the above-mentioned circumstances, and has been made to solve the above-mentioned conventional problems, and a first air pipe and a second air pipe are provided to left and right bellows for an air suspension. Air supply is possible, and these are equipped with predetermined detection means, leveling valves, switching valves, three-position valves, etc., so that no residual liquid is generated in the piping when unloading on sloping ground. The purpose is to propose a loading type tank truck.

[0005]

The technical means of the present invention for achieving this object is as follows. This tank lorry is a tank lorry that can be loaded from the bottom valve side of the tank in a bottom loading manner, and one end is connected to the tank via the bottom valve, and the other end is branched on the left and right sides under the tank. A pipe connected to the discharge port located at
Left and right bellows for the air suspension interposed between the vehicle body side and the axle such as the tanks and pipes; first air pipes branched from the air source to the left and right bellows in the middle; Left and right leveling valves respectively provided in the first air pipe; left and right detecting means for detecting whether or not the vehicle body and the axle are parallel and controlling the corresponding leveling valve; and the leveling valve and the bellows. A left and right switching valve provided in the left and right first air pipes, and a second air pipe branched from an air source via a three position valve and connected to the left and right switching valves. The three-position valve opens only the branched second air pipe on the left side and supplies air to the left bellows via the left switching valve or the branched second air pipe on the right side. Opening only the pipe side and supplying air to the right bellows via the right switching valve, or closing both without supplying air to any of the branched left and right second air pipes. Crab can be selectively switched. The switching valves on the left and right respectively open the first air pipe side and close the second air pipe side with respect to the left and right bellows, or close the first air pipe side. The second air pipe side can be opened or selectively switched. The left and right leveling valves are closed based on the detection results of the respective detecting means when the vehicle body and the axle are parallel to each other, and when the vehicle body and the axle are not parallel, Air is supplied through one air pipe, and the bellows on the side where they are separated from each other are switched through the first air pipe so as to be exhausted, thereby returning the vehicle body and the axle to parallel. . In addition, in the latter case, furthermore, by switching the three-position valve and the right or left switching valve, the left and right sides of the side where the vehicle body and the axle approach each other in the second air pipe as described above. Supply air to the bellows,
Thus, the bellows side of the vehicle body can be lifted to a higher height level at which the entire vehicle body becomes horizontal or reversely inclined.

[0006]

The present invention is constituted by such means, and operates as follows. That is, since this tank lorry is of the bottom loading type, loading and unloading are performed from the piping on the bottom valve side of the tank, and furthermore, since the tank lorry is of the double-sided piping type, it is appropriately loaded from both sides of the tank or one of its discharge ports. Then, unloading is performed. And when unloading on a slope, when unloading from the discharge port on the upper side of the slope (for example, stop the tank lorry on the left slope on the lower left, and unload from the upper right discharge port If you do) then: That is, in this case, the left and right leveling valves are switched by the left and right detecting means, and the bellows on the lower side of the inclination, that is, on the side closer to the body and the axle (for example, the left), is supplied through the first air pipe and the switching valve. The bellows on the side (for example, the right side) on the upper side of the inclination and between the vehicle body and the axle,
Air is exhausted through air piping and switching valves. Thus, the vehicle body and the axle are returned to parallel by the supply and exhaust of the left and right bellows. Further, by switching the three-position valve and switching either the left or right switching valve, the bellows which is still slightly on the lower side of the slope (for example, the left bellows) is moved to the second air pipe,
The air is further supplied through a three-position valve, a switching valve, and the like, and the vehicle body on the bellows side is further lifted, and the bellows side is raised to a higher height level at which the entire vehicle body becomes horizontal or reversely inclined. In this way, the entire vehicle
Incline until horizontal or reverse (e.g., right is down, right) incline so that unloading (e.g., on a left slope) is performed with the entire vehicle leaning horizontally or reverse (e.g., right). Become. In this way, in this tank lorry, residual liquid is generated in the pipe branched to the closed (for example, left side) discharge port opposite to the discharge port (for example, right side) where unloading is performed. Without doing so, all will be surely unloaded. That is, like this (eg on the left)
Since the pipe is unloaded after being discharged horizontally or above the discharge port to be unloaded (for example, on the right side), no residual liquid is generated there.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. In the tank lorry, the inside of the tank 1 is usually divided into a plurality of tank chambers (not shown), and various liquids such as gasoline, light oil, kerosene, lubricating oil, and other dangerous substances are transferred from the tank of the loading facility to the tank 1 of the tank lorry. It is loaded into each tank room, transported, and unloaded to the tank of the unloading equipment such as a gas station at the destination. First, referring to FIG. 5, the tank lorry can be loaded from the piping 3 on the bottom valve 2 side of the tank 1 in a bottom loading manner, and can be loaded and unloaded from both sides of the tank 1 by a double-sided piping system. It has become. That is, the pipe 3 has one end connected to each tank chamber of the tank 1 via the respective bottom valve 2, and the other end branched to both sides connected to the discharge ports 4 located on the left and right sides below the tank 1. A four-way switching valve, a pump and the like (not shown) are arranged on the way. And the suction /
Loading, discharging / unloading using a pump, and discharging / unloading by gravity are appropriately performed.

FIG. 3 is a rear view of such a tank truck suspension structure, and FIG. 4 is an air circuit diagram thereof. The suspension structure includes left and right bellows 9 for air suspension interposed between the vehicle body 7 such as the tank 1 and the axle 8, and a first air pipe 11 branched from the air source 10 to the left and right bellows 9. Left and right leveling valves 12 respectively provided in the branched left and right first air pipes 11 to supply and exhaust the bellows 9;
Left and right detecting means 13 for detecting whether the body 7 and the axle 8 are parallel and controlling the corresponding leveling valve 12
And The left and right bellows 9 are made of a pneumatic type that can expand and contract up and down, and the upper part is attached to the frame 14 on the vehicle body 7 side, and the lower part is the axle 8
The vehicle body 7 such as the tank 1 is attached to the axle 8
Suspended above. As the air source 10, a general air tank mounted on a vehicle, an air tank that accumulates pressure by driving an air compressor by a power extraction device of an engine, or the like is used. Also, the air source 10, the first air pipe 1
1, the left and right leveling valves 12 and the like are attached and fixed to a frame 14 and the like on the vehicle body 7 side. The left and right detecting means 13 include, for example, the leveling valve 12 and the axle 8.
A link mechanism interposed between them is used, and a detecting means 13 composed of the link mechanism has a lower end fixed to the axle 8 and an upper end side attached to an operation lever of the leveling valve 12, and the expansion and contraction thereof causes the vehicle body 7 to expand and contract. And whether the axle 8 is parallel or not is detected, and the leveling valve 12 is switched and controlled accordingly. Reference numeral 15 in FIG. 3 denotes wheels.

FIG. 1 is an air circuit diagram of an embodiment of the present invention. In the tank lorry of the present invention, as shown in FIG. 1, the air circuit of FIG. A second air pipe 16 and the like are provided. That is, reference numeral 17 denotes a switching valve.
The first air pipe 11 is provided between the left and right leveling valves 12 and the bellows 9, and is provided on the left and right. The second air pipe 16 is branched from an air source 18 via a three-position valve 19 and is connected to left and right switching valves 17. The switching valve 17 opens the first air pipe 11 side and closes the second air pipe 16 side with respect to the bellows 9, or closes the first air pipe 11 side and opens the second air pipe 16 side. Can be selectively switched. Three position valve 1
9 opens only the left branched second air pipe 16 side, that is, the left bellows 9 through the left switching valve 17.
, Or only the side of the right branched second air pipe 16 is opened, that is, the air is supplied to the right bellows 9 via the right switching valve 17, or any side of the It is possible to selectively switch whether or not the second air pipe 16 is closed without supplying air. Air source 18
In the illustrated example, the air source 10 is different from the aforementioned air source 10, but they may be configured in common. 2 in the figure
0 is a check valve. Of course, the second air pipe 16, the three-position valve 19, the switching valve 17, and the like are also fixed to the frame 14 and the like on the vehicle body 7 side.

The left and right leveling valves 12 are both closed when the body 7 and the axle 8 are parallel based on the detection results of the respective detecting means 13. On the other hand, when the body 7 and the axle 8 are not parallel, first, the bellows 9 on the side where the body 7 and the axle 8 are close to each other is supplied with air through the first air pipe 11. Are switched to exhaust air from the bellows 9 on the separated side via the first air pipe 11. Furthermore, by switching the three-position valve 19 and switching either the left or right switching valve 17, the left or right bellows 9 on the side where the body 7 and the axle 8 are approaching in the second air pipe 16.
, So that the bellows 9 side of the vehicle body 7 can be lifted to a higher height level at which the entire vehicle body 7 is horizontally or reversely inclined.

Since the present invention is configured as described above, it operates as follows. First, since this tank lorry is of a bottom loading type, loading and unloading are performed from the pipe 3 on the bottom valve 2 side of the tank 1 (see FIG. 5). Further, since this tank lorry is of a double-sided piping system, loading and unloading are performed from the left and right sides of the tank 1 or one of the discharge ports 4 as appropriate (see FIG. 5). When unloading is performed from the discharge port 4 on the upper side of the slope at the time of unloading on a slope, the following is performed. That is, as shown in the operation state diagram of FIG. 2, for example, when the tank lorry is stopped on a left slope where the left is lower and the unloading is performed from the upper right discharge port 4, the following is performed. In FIG. 2, θ represents the inclination angle, A represents the length of the left detecting means 13, and B represents the length of the right detecting means 13.

In this case, as shown in FIG. 2, first, the length A of the rod mechanism of the link mechanism of the left detecting means 13 is short, and the length B of the link mechanism of the right detecting means 13 is long. The left and right leveling valves 12 are switched by such left and right detecting means 13, and the lower side of the inclination is closer to the side between the vehicle body 7 and the axle 8, that is, the left bellows 9.
Is supplied, and the side on which the vehicle body 7 and the axle 8 are separated from each other on the upper side of the inclination, that is, the right bellows 9 is exhausted. Thus, the body 7 and the axle 8 are returned to the parallel state by the supply and exhaust of the left and right bellows 9 as described above. Further, by switching the three-position valve 19 and switching either the left or right switching valve 17, the second air pipe 16 further supplies air to the left bellows 9 which is still slightly lower in the slope. Thus, the vehicle body 7 on the bellows 9 side is lifted, and the entire vehicle body 7 is tilted until it becomes horizontal or reverse right tilt. In this way, for example, unloading on a left slope is performed by tilting the vehicle body 7 horizontally or conversely to the right. Therefore, in this tank lorry, no residual liquid is generated in the pipe 3 branched to the closed left discharge port 4 opposite to the right discharge port 4 where the unloading is performed, and all the liquid remains without fail. Become unloaded. In other words, the left pipe 3 is positioned higher than the horizontal or the right discharge port 4 to be unloaded, and the unloading is performed, so that no residual liquid is generated there.

As described above, the present invention is applied to a bottom-loading type tank lorry.
By adopting a configuration according to this, substantially the same operation and effect can be obtained. In other words, even in a top-loading tank lorry that loads from the upper injection hatch,
As described above, the switching valve 17, the three-position valve 19, and the left and right bellows 9, the leveling valve 12, the detection means 13, and the first air pipe 11 are also provided.
A second air pipe 16 and the like are provided to lower the vehicle body 7 to a predetermined height level when unloading on a sloped ground, and to tilt the entire vehicle body 7 horizontally or reversely so that the tank 1
It is conceivable that no residual liquid is generated in the lower pipe 3. In the above-described embodiment, the left and right detecting means 13
Although they are formed as separate members, they may be integrally formed, and the left and right leveling valves 12 may be individually controlled.

[0014]

As described above, the bottom-loading type tank lorry according to the present invention is capable of supplying air to the left and right bellows for the air suspension through the first air pipe and the second air pipe. , A leveling valve, a switching valve, a three-position valve, and the like, the following effects are exhibited. That is, first, although this bottom-loading type tank trolley employs a double-sided piping system, no residual liquid is generated in the piping when unloading on a slope. Therefore, the volume at the time of measurement includes not only the tank but also the piping. However, since no residual liquid is generated in the piping, measurement errors naturally do not occur. Second, the bottom-loading type tank lorry can be loaded and unloaded from both sides of the tank, which is one of the features of the double-sided piping system, or any of the tank loading and unloading facilities. In view of the above, it is convenient and easy to use, and is extremely excellent in workability. As described above, the effects exhibited by the present invention are remarkably large, for example, the problems existing in this kind of conventional example are eliminated.

[Brief description of the drawings]

FIG. 1 is an air circuit diagram showing an embodiment of a bottom-loading type tank truck according to the present invention.

FIG. 2 is an operation state diagram of the embodiment, showing a state before air supply and exhaust.

FIG. 3 is a rear view of the suspension structure of the tank lorry.

FIG. 4 is an air circuit diagram.

FIG. 5 is an explanatory rear view of a bottom-loading type tank truck with a double-sided piping system.

FIG. 6 is an explanatory rear view of a one-sided piping type bottom loading type tank truck.

[Explanation of symbols]

 Reference Signs List 1 tank 2 bottom valve 3 pipe 4 discharge port 5 pipe 6 protective frame 7 body 8 axle 9 bellows 10 air source 11 first air pipe 12 leveling valve 13 detecting means 14 frame 15 wheels 16 second air pipe 17 switching valve 18 air source 19 Three position valve 20 Check valve

Claims (1)

(57) [Scope of request for utility model registration] 1. A tank lorry which can be loaded from the bottom valve side of a tank in a bottom loading manner, one end of which is connected to the tank via the bottom valve and the other ends of which are branched right and left under the tank. The pipes connected to the discharge ports located on both sides, the left and right bellows for air suspension interposed between the axle and the vehicle body such as the tank and pipes, and the left and right bellows branched from the air source on the way. The first air pipe, the left and right leveling valves respectively provided in the branched first and second air pipes, and whether or not the body and the axle are parallel to each other is detected and the corresponding leveling valve is controlled. Left and right detecting means, left and right switching valves provided in the first air pipe between the leveling valve and the bellows, and a three-position valve branched from an air source. And a second air pipe connected to the left and right switching valves, and the three-position valve is connected to the branched left second valve.
Open only the air pipe side and supply air to the left bellows through the left switching valve, or open only the branched right second air pipe side and right through the right switching valve. To supply air to the bellows or to close both without supplying air to any of the branched left and right second air pipes. The switching valve is configured such that the first air pipe side is opened and the second air pipe side is closed, or the first air pipe side is closed and the second air pipe is closed with respect to the left and right bellows. The left and right leveling valves can be selectively switched.The left and right leveling valves are based on the detection results of the respective detection means, and when the vehicle body and the axle are parallel,
When both are not closed and not parallel, in order to supply air to the bellows on the side where both are approaching through the first air pipe, and to exhaust air from the bellows on the side where both are separated via the first air pipe, In this case, the three-position valve and the left or right switching valve are further switched to switch the second position.
As described above, air is supplied to the left or right bellows on the side where the vehicle body and the axle are approaching by the air pipe, and the upper side of the same bellows side of the vehicle body is horizontally or reversely inclined. A bottom-loading tank lorry that can be lifted to a height level.