JP3269752B2 - Tank lorry bottom valve operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for operating a bottom valve of a tank lorry. That is, the present invention relates to a bottom valve operating device for a tank lorry that opens and closes a bottom valve provided at a tank bottom.

[0002]

2. Description of the Related Art FIG. 2 is a longitudinal sectional view showing a conventional bottom valve operating device of this type together with a bottom valve. Tank lorry 1
In general, the inside of the tank 2 is divided into a plurality of tank chambers 3, and a bottom valve 4 is provided at the bottom of each tank chamber 3 of such a tank 2, so that unloading from each tank chamber 3 can be performed. Loading into each tank chamber 3 is performed via this bottom valve 4. By the way, this kind of tank truck 1
In general, the bottom valve 4 provided at the bottom of the tank chamber 3
Is opened and closed by a handle 6 provided on the tank chamber 3 via a connection mechanism 5. Conventionally, such a bottom valve opening / closing device A conventionally has a flange portion 7 fixed on the upper portion of the tank chamber 3, a bearing 8 fixed coaxially on the flange portion 7, and a vertical portion in the flange portion 7 and the bearing 8. A shaft 9 inserted therethrough, a handle 6 attached to an upper end of the shaft 9 protruding above the tank chamber 3, and a coupling mechanism 5 connected to a lower end of the shaft 9 in the tank chamber 3, The connection mechanism 5 was configured to be connected to the bottom valve 4 at the bottom of the tank chamber 3.

[0003]

The following problems have been pointed out in such a conventional example. That is, in the conventional bottom valve opening / closing device A, when unloading a cargo receiving tank such as a gas station, first, an operator (in many cases, a driver, hereinafter the same) applies a tank truck. 1 and turns the handle 6 of the tank chamber 3 to be unloaded, thereby opening the bottom valve 4 via the shaft 9 and the coupling mechanism 5, so that the tank from the tank chamber 3 to be unloaded is received. Unloading has been started. Further, when the unloading was started in this way, the worker once got down to the ground side and was engaged in the unloading incidental work. When the unloading is completed, the worker returns to tank 2 again.
By ascending and turning the handle 6 of the tank chamber 3 to be unloaded, the bottom valve 4 is closed via the shaft 9 and the coupling mechanism 5.

As described above, in this type of conventional bottom valve opening / closing device A, an operator reciprocates between the ground side and the tank 2 when unloading. It has been pointed out that climbing up and down places a heavy burden on workers and also involves a risk of falling down. In particular,
The tank 2 of the tank lorry 1 is divided into a plurality of tank chambers 3 as described above, and such unloading and unloading is required for each unloading from each tank chamber 3, so that the burden on the operator and the danger Had become a big problem. In addition, each tank room 3
Is loaded via the bottom valve 4, that is, when bottom loading is performed from the bottom valve 4 side using a pump instead of loading from the manhole side on the tank chamber 3. However, as in the case of the above-mentioned unloading, it is necessary to go up and down on the tank 2, and the burden and the danger of the operator have become a problem.

The present invention has been made in view of such circumstances, and has been made in order to solve the above-mentioned problems of the conventional example. The present invention has been made by using a motor through an interposed gear, a gear, a hole thereof, a transmission rod, and the like. By rotating the handle forward and reverse and arranging the operation part of the switching valve for controlling the drive of the motor near the ground, firstly, it is necessary for the worker to go up and down on the tank when unloading. Secondly, it is an object of the present invention to propose a bottom valve operating device for a tank lorry in which this can be realized easily and easily.

[0006]

The technical means of the present invention for achieving this object is as follows. That is, the bottom valve operating device for a tank lorry relates to a tank lorry of a type in which a bottom valve provided on a tank bottom is opened and closed by a handle provided on the tank via a coupling mechanism. And
A flange portion fixed to the upper portion of the tank, a bearing coaxially fixed on the flange portion, a shaft vertically penetrated through the flange portion and the bearing, and attached to an upper end of the shaft projecting above the tank And the connecting mechanism connected to the lower end of the shaft in a tank, and further has the following configuration. A plurality of transmission rods suspended from the handle; a gear having a boss portion rotatably fitted to the bearing; and a plurality of holes formed in the gear and into which the transmission rod is inserted. A motor connected to the gear via an intermediary gear and rotatable in the forward and reverse directions, a drive control switching valve provided in a drive circuit of the motor, and an operation unit of the switch valve disposed closer to the ground And

[0007]

The present invention comprises the above-mentioned means, and operates as follows. According to this bottom valve operating device, at the time of unloading or the like, the operator operates the operation unit from the ground side to switch the switching valve to rotate the motor in the normal / reverse direction.
The handle is rotated forward / reverse via a gear, a hole thereof, a transmission rod, and the like. When the handle on the tank rotates in the normal or reverse direction, the bottom valve at the bottom of the tank is opened and closed via the shaft and the coupling mechanism, thereby carrying out unloading and the like.

Therefore, first, according to this bottom valve operating device, an operator does not need to go up and down on the tank when unloading or the like, but only by switching the switching valve from the ground side.
The bottom valve can be opened and closed. Accordingly, the burden on the worker is reduced and there is no danger of falling down. Secondly, this bottom valve operating device is different from the conventional bottom valve operating device in that a transmission rod is hung on a handle, a gear with a hole is fitted on a bearing, and a motor with an interposed gear is used. By providing a drive control switching valve or the like, the present invention can be easily applied, and the first point described above is easily and easily realized.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 shows an embodiment of the present invention,
FIG. 1A is a longitudinal sectional view, and FIG. 2B is an explanatory view of a drive circuit and the like. FIG. 3 is a side view of the tank truck.

First, the tank lorry 1 will be generally described with reference to FIG. The tank lorry 1 has a tank 2 partitioned into a plurality of tank chambers 3 and each tank chamber 3
Bottom valves 4 are provided respectively, and unloading from each tank chamber 3 is performed via each bottom valve 4, piping 10 (see FIG. 2), discharge valve and the like.

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
(Chamber). Then, regular gasoline, high-octane gasoline, light oil, kerosene, other oil, and the like are loaded from the storage tanks such as the oil depots into the respective tank chambers 3 through the loading holes provided in the manholes. In many cases, different types of oil or the like are loaded every three. In addition, instead of loading from the manhole side on the tank chamber 3, so-called bottom loading, in which the pump is loaded from the bottom valve 4 side below the tank chamber 3, may be performed.

The tank lorry 1 loads and transports these oils and the like in the tank chambers 3 of the tank 2 and unloads them to a receiving station such as an underground tank of a gas station. The unloading from the tank 2 is performed at the bottom valve 4 of each tank chamber, the pipe 10 having one end branched and connected to each bottom valve 4, the other end of the assembled pipe 10, and below the left and right sides of the tank 2. It is carried out through a discharge port with a discharge valve, a discharge hose (not shown) having one end connected to the discharge port, or the like. The cargo receiving tanks at the gas station such as a gas station are partitioned by types such as regular gasoline, high-octane gasoline, light oil, kerosene, and other oils. The tank lorry 1 may be a unitary type as shown in the illustrated example, or may be a trailer type in which a trailer on which the tank 2 is mounted is pulled by a tractor. The tank lorry 1 is generally like this.

Referring now to FIG. 1, the bottom valve operating device B of the present invention will be described.
Will be described. As shown in FIG. 1A, the bottom valve operating device B is provided at the bottom of each tank chamber 3 of the tank 2 similarly to the above-described bottom valve operating device A of FIG. Each of the bottom valves 4 is connected to the tank chamber 3 via a connecting mechanism 5.
It is configured to be opened and closed by the handle 6 provided above.
And a flange 7 fixed to the upper part of the tank chamber 3;
A bearing 8 coaxially fixed on the flange portion 7, a shaft 9 vertically inserted through the flange portion 7 and the bearing 8, and a handle 6 attached to an upper end of the shaft 9 protruding above the tank chamber 3. , A connection mechanism 5 connected to the lower end of the shaft 9 in the tank chamber 3.

These will be described in more detail. First, the flange portion 7 is inserted into the upper opening 11 provided above each tank chamber 3 of the tank 2 while the packing 12 is interposed therebetween.
3 and the like, which are tightly fixed from above and are also called bosses or bushes. The bearing 8 is coaxially fixed on the flange portion 7 by screwing or the like, and has a substantially cylindrical shape. A shaft 9 serving as a handle shaft is vertically vertically rotatably and vertically rotatably inserted into the flange portion 7 and the bearing 8, and guided while being sealed by the flange portion 7 and the bearing 8. The O-ring 14 is further interposed. And the handle 6 has such a shaft 9
The hub 15 is mounted and fixed to the upper end of the shaft 9, that is, the upper end of the shaft 9 protruding above the tank chamber 3, the flange portion 7, and the bearing 8 while being externally fitted. So,
The handle 6, together with the shaft 9, is rotatable forward and backward in the left-right direction and vertically movable in the up-down direction. A connecting mechanism 5 is connected to a lower end of the shaft 9 in the tank chamber 3. The connecting mechanism 5 has an upper end of the rod 17.
The lower end of the rod 17 is connected to the lower end of the shaft 9 via the joint yoke 18.
It is connected to the screw shaft 19 of the bottom valve 4 via 8 (see the lower part of FIG. 2).

Here, the bottom valve 4 will be described in detail. FIG. 2 shows an example of the bottom valve 4. The bottom valve 4 shown in FIG. 2 has a lower opening 20 at the bottom center of the tank chamber 3.
A lower valve box 22 tightly fixed from below with bolts 21 and the like, a valve hole 23 formed on the upper surface of the lower valve box 22,
A valve seat 24 at the periphery of the valve hole 23, an upper valve box 25 erected from the outside of the valve seat 24 of the lower valve box 22, and an upper valve box 2
5, a plurality of inlets 26, etc., formed at the lower part. The valve body 27 is provided inside the upper valve box 25.
The valve body 27 can move up and down, and is pressed against the valve seat 24 of the lower valve box 22 from above via a packing 28.
By separating and opening and closing the valve hole 23,
The bottom valve 4 is opened and closed. The lower end of the vertical screw shaft 19 is rotatably mounted on the valve body 27 of the bottom valve 4 in the forward and reverse directions. The screw shaft 19 is rotatable in the normal and reverse directions about the axis thereof and is vertically movable. The screw shaft 19 is coaxial with the valve hole 23, the valve seat 24, the valve body 27 and the like, and is formed on the top of the upper valve box 25. The upper end protrudes into the tank chamber 3 while being screwed into the hole 29. The rod 17 of the connecting mechanism 5 is attached to the upper end of the screw shaft 19 of the bottom valve 4 projecting into the tank chamber 3 as described above.
Are connected via a joint yoke 18.

Therefore, in the bottom valve opening / closing device B shown in FIG. 1 (1), the handle 6 is rotated forward and backward similarly to the conventional bottom valve opening / closing device A shown in FIG. By moving up and down, the shaft 9, the joint yoke 18 and the rod 17 of the connection mechanism 5 in the tank chamber 3, the rod 17, the screw shaft 19, and the like follow, and these follow up and down while rotating in the forward and reverse directions. As a result, the valve body 27 is
, And the bottom valve 4 is opened and closed. When the handle 6 rotates clockwise, the shaft 9, the coupling mechanism 5, the screw shaft 19 and the like descend, and the valve body 2
When the valve 7 is pressed against the valve seat 24 and the bottom valve 4 is closed, and the handle 6 is turned counterclockwise, the shaft 9, the coupling mechanism 5, the screw shaft 19 and the like are raised, and the valve body 27 is separated from the valve seat 24. Then, the bottom valve 4 is opened.

The bottom valve operating device B shown in FIG. 1 (1) is different from the conventional bottom valve operating device A shown in FIG. Is provided.
That is, in addition to the above-described configuration, the bottom valve operating device B further includes a plurality of transmission rods 30 suspended from the handle 6 on each tank chamber 3 and a bearing 8 on each tank chamber 3.
1 is rotatably fitted to the outside of the gear 32, and a plurality of holes 33 formed in each gear 32 and into which the transmission rod 30 is inserted.
And a motor 35 connected to each gear 32 via an intermediary gear 34 and rotatable in the forward and reverse directions, a drive control switching valve 37 provided in a drive circuit 36 for each motor 35, and disposed near the ground. And an operation section 38 of each switching valve 37.

These will be described in more detail. First, a plurality of transmission rods 30 are fixedly suspended from the outer peripheral portion of the handle 6 with an interval therebetween, and may be provided integrally with the handle 6, or may be provided detachably from the handle 6. Alternatively, the handle 6 may be attached to the handle 6 such that the handle can be bent or lifted independently. The gear 32 is a bearing 8
The boss portion 31 is coaxially and horizontally tightly and externally fitted to the small diameter portion on the step portion formed in the above, and is rotatable. The gear 32 is provided with a plurality of holes 33 corresponding to the diameter, interval, and position of the transmission rod 30 described above, and the transmission rod 30 is inserted into each of the holes 33. . The motor 35 in the illustrated example is an air-driven motor that can rotate forward and reverse, and has a motor shaft 39.
An intermediary gear 34 is attached to the
4 and the gear 32 described above are meshed. In the illustrated example, a worm and a worm wheel are used as the interposed gear 34 and the gear 32.

In the illustrated example, an air-driven motor 35 is used, and an air-driven drive mechanism is employed. That is, as shown in FIG. 1B, one end of an air pipe 42 constituting a drive circuit 36 of a motor 35 is connected to an air tank 41 of a pressurized air source 40 mounted on the vehicle. The other end is branched by the number of tank chambers 3. The other end of the branched air pipe 42 is guided to a motor 35 for driving the rotation of the handle 6 for each tank chamber 3 via the switching valve 37. This switching valve 37 is connected to an air pipe 43 circulating through a motor 35, one side of which is connected to the air pipe 42 and the other side is open to the atmosphere, or vice versa, or both the one side and the other side are open to the atmosphere. And the air pipe 42 can be switched to any of the following.

The operating portions 38 of the switching valve 37, such as operating levers, are disposed on the tank lorry 1 closer to the ground. In the illustrated example, as shown in FIG. 3, the operation lever of the switching valve 37 for each tank chamber 3, that is, the operation section 38, is assembled near the chassis frame 44 below the tank 2.

In the illustrated example, such a pneumatic drive mechanism is employed for driving the motor 35. Then, regarding the switching valve 37 of the tank chamber 3 to be unloaded or the like,
By operating the operation part 38 which is the operation lever,
Pressurized air is supplied to the motor 35 from the air tank 41 of the pressurized air source 40 shown in FIG.
Is driven to rotate forward and backward by a predetermined amount. Therefore, through the interposed gear 34, the gear 32, the hole 33, the transmission rod 30, and the like,
The rotation of the motor 35 is transmitted, and the handle 6 of the tank chamber 3 is rotated forward and backward as appropriate.
Presses against and separates from the valve seat 24, and the bottom valve 4 is opened and closed.
See also).

In FIG. 1 (2), reference numeral 45 denotes a pressure regulating valve. The pressure regulating valve 45 is branched and connected to the above-mentioned air pipe 42 forming a drive circuit 36 of the motor 35. Then, the pressure adjusting valve 45 is rotated by a predetermined amount by the motor 35, and the handle 6 is rotated by an amount sufficient to open and close the bottom valve 4, so that the valve body 27 is lowered and pressed against the valve seat 24 or raised. When it reaches the top of the upper valve box 25, it is activated. The pressure regulating valve 45 is operated under such condition setting to release the air in the air pipes 42 and 43 to the atmosphere and to release the pressure, whereby the motor 3 is released.
Since the handle 5 is stopped in a free state without being locked, the handle 6 is always rotated with a constant torque, and the bottom valve 4 is opened and closed stably.

In the illustrated example, the air-driven motor 35 is used as described above, and an air-type driving mechanism is used to drive the motor 35. It is possible. For example,
A hydraulic drive mechanism is adopted, and the hydraulic pressure from the hydraulic source is applied to a drive circuit 36 composed of hydraulic piping by the switching valve 3 as described above.
7 may be supplied to each of the hydraulically driven motors 35. In this case, return pipes from each motor 35 to the hydraulic pressure source are provided, but of course, the operation part 38 of the switching valve 37 and the like are the same as described above.

The present invention is configured as described above. Then, it becomes as follows. This bottom valve operating device B
The handle 35 is rotated forward / reverse by a motor 35 via an intermediary gear 34, a gear 32, a hole 33 thereof, a transmission rod 30, and the like, and a drive control switch provided in a drive circuit 36 of the motor 35 is switched. The operation unit 38 of the valve 37 is disposed closer to the ground. When the handle 6 on the tank chamber 3 of the tank 2 is rotated in the normal or reverse direction, the shaft 9 inserted through the flange portion 7 or the bearing 8 above the tank chamber 3 of the tank 2,
The bottom valve 4 at the bottom of the tank chamber 3 is opened and closed via a connection mechanism 5 and the like in the tank chamber 3.

Therefore, in the bottom valve operating device B,
When unloading the loaded gasoline, light oil, kerosene, other oil, etc. from the tank chamber 3 of the tank 2 of the tank lorry 1 to a receiving tank of a gas station or the like, a worker must start from the ground side. By operating the operation unit 38 such as the operation lever of the switching valve 37, the unloading can be started and the unloading can be ended. That is, the operator operates the operation unit 38 from the ground side to switch the switching valve 37, thereby controlling the driving of the motor 35, and thereby
Are rotated forward and reverse, so that the interposed gear 34 and the gear 3
2. The handle 6 on the tank chamber 3 is rotated forward and backward through the hole 33, the transmission rod 30, and the like. When the handle 6 on the tank chamber 3 is rotated forward and backward in this manner,
The bottom valve 4 at the bottom of the tank chamber 3 is opened and closed via a shaft 9 at the upper part of the tank chamber 3 and a connection mechanism 5 in the tank chamber 3, and the unloading is performed. By the way, this tank truck 1
In the bottom valve operating device B, the following first and second operations are performed.

First, according to the bottom valve operating device B, when unloading, the worker does not need to go up and down on the tank 2, and does not reciprocate between the ground side and the tank 2. The bottom valve 4 can be opened and closed only by switching the switching valve 37 for controlling the drive of the motor 35 from the side. Therefore, when the unloading is performed by the bottom valve operating device B, the burden on the worker is reduced by the amount that the worker does not go up and down as compared with the above-described conventional bottom valve operating device A (see FIG. 2). There is no danger of falling because it does not descend.

Secondly, the bottom valve operating device B is a conventional bottom valve operating device A which has been widely used.
And it is easily applicable. That is, in the conventional bottom valve operating device A of this type, the transmission rod 30 is attached to the handle 6 thereof.
, And a gear 32 with a hole 33 is rotatably fitted to the bearing 8, and a motor 35 with an interposed gear 34, a switching valve 37 with an operation part 38 for controlling its drive, etc. Is provided, it can be easily applied. As described above, according to the bottom valve operating device B, the first point described above is easily and easily realized.

First, in the above-described example, the tank chamber 3 of the tank truck 1 is operated by the bottom valve operating device B as described above.
To unload gasoline, light oil, kerosene, other oils, etc., loaded into a receiving tank at a gas station such as a gas station, the bottom valve operating device B further includes:
Tank room 3 of tank truck 1 from storage tanks such as oil tanks
In the case of so-called bottom loading, in which gasoline, light oil, kerosene, other oils and the like are loaded using a pump, the invention can be similarly used. That is, in the case of such loading, the operator operates the operation section 38 of the switching valve 37 from the ground side in exactly the same way as described in the case of unloading.
, It is not necessary to go up and down on the tank 2, so that the burden on the operator is reduced and there is no danger of falling down.

Second, the bottom valve operating device B can be easily converted to a system for opening and closing the bottom valve 4 by manually operating the handle 6. That is, like the above-described conventional bottom valve operating device A (see FIG. 2),
When unloading or the like, the handle 6 on the tank 2, that is, the handle 6 on the tank chamber 3 may be manually rotated forward and reverse manually without using the motor 35 to open and close the bottom valve 4. Is possible, easily.

In this case, the engagement between the gear 32 on the handle 6 side and the intermediary gear 34 on the motor 35 is disengaged, and the nut 16 for fixing the handle 6 is temporarily removed. 6, the transmission rod 30 is positioned on the upper side contrary to the illustration, and is again fixed to the upper end of the shaft 9 with the nut 16. The transmission rod 30 is detached from the handle 6, bent, or singly. By raising or the like, the handle 6 is brought into a free state separated from the motor 35 side. Accordingly, the bottom valve operating device B can be easily diverted to a system in which the bottom valve 4 is opened and closed by manual operation of the handle 6.

[0031]

As described above, the bottom valve operating device for a tank lorry according to the present invention is designed so that the handle is rotated forward and reverse by the motor via the interposed gear, the gear, the hole thereof, the transmission rod and the like. In addition, the following effects are exhibited by arranging the operation unit of the switching valve for controlling the drive of the motor near the ground.

First, the operator does not need to go up and down on the tank when unloading or the like. That is, according to this bottom valve operating device, when unloading or loading using a pump, the operator can open and close the bottom valve by remote control from the ground side, and does not need to reciprocate between the ground side and the tank.
Therefore, compared to the above-described conventional bottom valve operating device of this type,
The burden on the worker is greatly reduced, and safety is improved without danger of falling down.

Second, and this is easily and easily realized. That is, this bottom valve operating device has a simple configuration,
It is simple and easy and is excellent in cost, for example, it can be easily applied to the above-described conventional bottom valve operating device, that is, a bottom valve operating device that has been widely used. In this way, the problems existing in this kind of conventional example are wiped out,
The effects exhibited by the present invention are remarkably large.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a bottom valve operating device for a tank lorry according to the present invention, wherein FIG. 1 is a longitudinal sectional view thereof, and FIG.
The figure is an explanatory diagram of the drive circuit and the like.

FIG. 2 is a longitudinal sectional view showing a conventional bottom valve operating device of this type together with a bottom valve.

FIG. 3 is a side view of the tank truck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank lorry 2 Tank 4 Bottom valve 5 Connection mechanism 6 Handle 7 Flange part 8 Bearing 9 Shaft 30 Transmission rod 31 Boss part 32 Gear 33 Hole 34 Interposition gear 35 Motor 36 Drive circuit 37 Switching valve 38 Operation part B Bottom valve operating device

Continuation of the front page (56) References JP-A-7-208638 (JP, A) JP-A-1-164195 (JP, U) JP-A-4-109272 (JP, U) JP-A-6-59677 (JP) , U) Japanese Utility Model Showa 57-93675 (JP, U) Japanese Utility Model Showa 63-80301 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60P 3/22 B65D 88/12 F16K 31/46

Claims (1)

(57) [Claims] 1. A bottom valve operating device for a tank lorry in which a bottom valve provided on a tank bottom is opened and closed by a handle provided on the tank via a coupling mechanism, wherein the flange is fixed to an upper part of the tank. Part, a bearing coaxially fixed on the flange part, a shaft vertically penetrated through the flange part and the bearing, the handle attached to an upper end of the shaft protruding above the tank, The coupling mechanism connected to the lower end of the shaft in the tank; a plurality of transmission rods hanging from the handle; a gear having a boss portion rotatably fitted to the bearing; A plurality of holes into which the transmission rods are inserted, a motor connected to the gear via an intermediary gear and rotatable forward and reverse, and a drive control switching valve provided in a drive circuit of the motor; ,
An operating part of the switching valve disposed closer to the ground.