JPH10203598A - Unloading control device for tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and smoothly perform an unloading work from tank lorry by a method wherein even under a state wherein the valve operating shaft of a bottom valve which is operated by a bottom valve handle, is locked, the valve operating shaft can be operated in the closing direction of the bottom valve, and cannot be operated in the opening direction. SOLUTION: To a valve operating shaft 7 to which a bottom valve handle 8, being manually operated by a worker, is attached, a ratchet gear 22 is attached, and at the leading end of a piston rod 27 which is driven in the straight line direction between an advancing limit position and a retracting limit position by a pneumatic cylinder 26, an engaging claw 29 which prevents the valve operating shaft 7 from rotating in the direction to open the valve body, by engaging with the ratchet gear 22, and allows the valve operating shaft 7 in the direction to open the valve body, is provided. Thus, even under a state wherein the ratchet gear 22 and the engaging claw 29 are engaged, the bottom valve handle 8 can be operated in the direction to close the valve body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unloading control device for a tank lorry capable of reliably unloading petroleum products transported by a tank lorry at a predetermined unloading place.

[0002]

2. Description of the Related Art In a tank truck, a plurality of hatches are divided by a partition plate in order to transport a plurality of types of petroleum products at a time, such as regular gasoline, high octane gasoline, kerosene and light oil. A plurality of petroleum products having different oil types are accommodated in separate hatch portions and transported at one time.

[0003] Underground tanks at gas stations are also partitioned for each type of oil. When unloading petroleum products from a tanker truck to an underground tank at a gas station, each of the petroleum products transported by the tanker truck must be separated by a predetermined amount. Need to be injected into the underground tank.

[0004] Each hatch is provided with an on-off valve, also referred to as a bottom valve, for discharging the petroleum products contained therein. Each hatch is connected to a common pipe via each bottom valve. I have. At a gas station, a predetermined oil supply pipe and a common pipe among a plurality of underground tank oil supply pipes are connected by using a hose so that oil products in a predetermined hatch portion are supplied into the predetermined underground tank.

[0005] In order to perform such an unloading operation from a tank truck, a system in which the shipping information of the amount and type of unloading oil at each filling station is stored in a shipping information card is disclosed in, for example, Japanese Patent Laid-Open Publication No. HEI 9-260,009. It has been developed as shown in JP-A-7-251900.

In this system, an operator first reads an oil type code indicated near a connection port of a specific underground tank oil supply pipe by a code reader in accordance with an unloading order, and connects a hose to the underground tank. Connect to the oil supply pipe, read the oil type code attached to the corresponding hatch part of the tank part of the tank truck by a code reader, and if both oil type codes match, open the bottom valve. I'm trying to get.

[0007]

In a tank lorry having such an unloading system, in order to prevent an operator from inadvertently opening the bottom valve, the bottom valve is opened and closed. For example, a lock mechanism is provided on a valve operating shaft for performing the operation. When the oil type of the underground tank oil supply pipe to be unloaded and the hatch portion in which the oil type is stored match, the lock mechanism is operated by a signal from a control unit provided in the vehicle. Unlock. In this state, the unloading operation is performed, the unloading operation of the predetermined oil type is completed, and after the operator operates the bottom valve handle and closes the bottom valve, when the operator instructs the end of the unloading operation, The valve operating shaft is automatically closed by the lock mechanism.

However, if the operator performs insufficient bottom valve handle operation after completion of the unloading operation and instructs the unloading end in a state where the bottom valve is not completely closed,
In this state, the bottom valve handle cannot be operated, so that the valve operating shaft cannot be further operated on the bottom valve handle. Similarly, even when the bottom valve is operated in the almost fully closed state, if the bottom valve handle is not sufficiently tightened with the predetermined tightening allowance, after the lock mechanism is actuated, The bottom valve handle cannot be operated.

Therefore, when the valve operating shaft is locked by operating the lock mechanism and the valve operating shaft is further rotated by operating the bottom valve handle, the key operation using the operation board is troublesome. Therefore, there is a problem that the unloading operation cannot be performed smoothly.

[0010] It is an object of the present invention to operate a valve operating shaft in a direction in which the bottom valve is closed, and in a direction in which the valve is opened, even when the valve operating shaft of the bottom valve operated by the bottom valve handle is locked. The object of the present invention is to make it possible to perform the unloading operation from the tank lorry quickly and smoothly by making the operation impossible.

The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0012]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

That is, the unloading control device for a tank truck according to the present invention comprises a plurality of hatch portions for accommodating a plurality of types of petroleum products for each type, a common pipe for guiding the petroleum products from each hatch portion, A bottom valve that is provided for each hatch portion and opens and closes a flow path that connects the inside of each hatch portion and the common pipe, and a discharge valve that is provided at the tip of the common pipe and opens and closes a flow path in this common pipe. Having, in an underground tank that stores the petroleum products in each hatch for each oil type at the gas station,
An unloading control device for a tank lorry that injects through a hose connected to the common pipe, wherein a bottom valve handle that is connected to a valve body incorporated in the bottom valve and that is manually operated by an operator. A valve operating shaft that is mounted to open and close the valve body, a ratchet tooth attached to the valve operating shaft, and a moving member driven between a lock position and a retracted position by a fluid pressure cylinder, A locking pawl that meshes with the ratchet teeth in the locked position to prevent the valve operating shaft from rotating in the opening direction of the valve body and allowing the valve operating shaft to rotate in the closing direction; The present invention is characterized in that the bottom valve handle can be operated in the direction in which the valve element is closed even when the locking pawl is engaged.

Further, the unloading control device for a tank truck according to the present invention is provided with a bottom valve handle which is connected to a valve body incorporated in the bottom valve and which is manually operated by an operator. A valve operating shaft that opens and closes, a locking claw attached to a distal end of a moving member that is driven between a lock position and a retracted position by a fluid pressure cylinder disposed adjacent to the valve operating shaft; A first rotator attached to a shaft, a second rotator fitted with the first rotator and formed with an engaging portion that meshes with the locking claw; the first rotator and the second rotator; And the locking claw is engaged with the engagement portion so that the second
In a state where the rotation of the rotating body is blocked, when the valve operating shaft is rotated in the direction to open the valve body by operating the bottom valve handle, the rotation is blocked while the valve operating shaft is rotated in the closing direction. Sometimes, a one-way clutch mechanism that allows the rotation is provided, and the bottom valve handle can be operated in the direction to close the valve body even when the rotation of the second rotating body is blocked by the locking claw. It is characterized by doing so.

According to the present invention, if the valve operating shaft is locked by the operation of the hydraulic cylinder, the valve operating shaft cannot be rotated by the bottom valve handle in the direction in which the bottom valve is opened. The bottom valve is prevented from being easily opened, and the safety of the unloading operation is ensured. On the other hand, even when the valve operating shaft is locked, the valve operating shaft can be rotated by the bottom valve handle in the direction to close the bottom valve, so that the bottom valve has an insufficient closing opening degree. Also, the operation of closing the bottom valve can be performed, and the unloading operation of the petroleum product can be quickly performed.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a schematic view showing a tank truck equipped with an unloading control device according to the present invention. A partition plate 2 is provided in a tank unit 1 mounted on the tank truck. A plurality of partitioned storage tanks, that is, hatch portions 3a to 3g are formed. In the case of illustration, all the hatch portions 3a to 3g are shown as having the same volume for the sake of convenience of description, but the volumes may be different from each other, and the number of hatch portions is seven. However, the number is not limited to this, and can be set to an arbitrary number.

In each hatch portion, petroleum products of different oil types such as high octane gasoline, regular gasoline, light oil, kerosene, and heavy oil are separately stored. However, the same kind of petroleum products may be stored in a plurality of hatches.

Unloading pipes 4a to 4g are connected to the bottoms of the hatch portions 3a to 3g, and the unloading pipes 4a to 4g are connected to the common pipe 5, respectively. In each of the unloading pipes 4a to 4g, a flow path for communicating the corresponding hatch portion with the common pipe 5 is formed. In order to open and close the respective flow paths, the bottom valves 6a to 6g are unloaded with the unloading pipe 4a. ~ 4g.

Each of the bottom valves 6a to 6g is opened and closed by a manual operation of an operator, and valve operating shafts 7a to 7g connected to valve elements in the bottom valves respectively pass through the hatch portions. At the upper end of the valve operating shaft, bottom valve handles 8a to 8g for rotating each of them are attached. Thus, when unloading the petroleum product in the predetermined hatch, the operator rides on the tank 1 and operates the predetermined bottom valve handle to open and close the bottom valve.

The common pipe 5 is provided with a shut-off valve 11, and the opening and closing operation of the shut-off valve 11 is performed by an actuator 12 which is operated by air pressure. 14 is controlled by the fluid pressure supplied. Therefore, even if one of the bottom valves is opened due to the operator's error in operating the bottom valve handle, the oil product in the hatch does not flow into the common pipe 5 unless the shutoff valve 11 is opened.

At the end of the common pipe 5, a discharge valve 15 which is opened and closed by manual operation is provided.
The hose 16 is connected to the discharge port 5. Connections 17a to 17f of a plurality of underground tank refueling pipes connected to an underground tank provided at a gas station are provided on the ground, and any one of these connections and a discharge port of the discharge valve 15 are provided. Is connected to a hose 16 to unload petroleum products.

On the upper surface of the tank portion 1, a bottom valve handle 8a
Lock mechanisms 21a to 21g are provided corresponding to the respective hatch portions 3a to 3g in order to prevent the operator from performing the opening operation of the bottom valve due to .about.8g.

Details of the lock mechanisms 21a to 21g are shown in FIGS. As shown in FIG. 2, a bottom valve handle 8 is attached to a portion of the valve operating shaft 7 protruding from the upper surface of the tank unit 1, and the valve operating shaft 7 is located below the bottom valve handle 8. The semi-circular ratchet teeth 22 are attached by a semi-circular mounting plate 23. The ratchet teeth 22 and the mounting plate 23 are fastened to each other by a screw member 24 so as to sandwich the valve operating shaft 7.

The ratchet tooth 22 has a tooth portion 25 having a meshing tooth surface 25a facing in the radial direction and an inclined surface 25b.
A plurality of pneumatic cylinders 26 are mounted on the upper surface of the tank 1 adjacent to the ratchet teeth 22. A moving member 28 fixed to the distal ends of two piston rods 27 that are reciprocally movable in a linear direction on the pneumatic cylinder 26 is provided with a locking claw 29 that meshes with the teeth 25 of the ratchet teeth 22. Locking member 3
0 is fixed.

The illustrated pneumatic cylinder 26 is a single-acting cylinder, and when compressed air is supplied into the pneumatic cylinder 26, the locking claw 29 is moved by the air pressure to an unlocked position shown by a two-dot chain line in FIG. Move backward. On the other hand, when the compressed air in the pneumatic cylinder 26 is discharged to the outside, the locking member 3
0 moves closer to the ratchet teeth 22 and becomes the lock position. As the pneumatic cylinder 26, a cylinder having only one piston rod can be used.

Each lock mechanism 21 shown in FIG.
The control unit 1 is provided in the pneumatic cylinder 26 in a to 21 g.
From 3, compressed air is supplied by a pneumatic pipe 31. Therefore, the respective valve operating shafts 7a to 7a
7g is unlocked by supplying compressed air to the pneumatic cylinder 26 of the lock mechanism, and the locking operation is performed by discharging the air in the pneumatic cylinder 26 to the outside.

When the locking member 30 approaches the ratchet teeth 22, as shown in FIG.
9b comes into contact with the inclined surface 25b of the tooth portion 25, and the meshing tooth surface 29a of the locking claw 29 and the tooth portion 25 as shown in FIG.
The meshing tooth surfaces 25a are brought into contact with and meshed with each other, and the operation of the bottom valve handle 8 in FIG. 4 prevents the valve operating shaft 7 from rotating in the counterclockwise direction, that is, the direction in which the bottom valve is opened.

On the other hand, when the valve operating shaft 7 is rotated clockwise as shown by the arrow, that is, in the direction to close the bottom valve,
If there is a rotation allowance, the inclined surface 25b of the tooth portion 25 and the inclined surface 29b of the locking claw 29 are in contact with each other, so that the valve operating shaft 7 is rotated in the direction to close the bottom valve. It is acceptable to do so.

In FIG. 1, each of the hatch portions 3a-3
g lock mechanisms 21a-21 provided corresponding to g
Each of g has the structure shown in FIGS. Therefore, when the operator operates the bottom valve handle 8 to close the bottom valve after the unloading operation of the petroleum products stored in the hatch, the bottom valve is closed until the bottom valve is completely closed. If the pneumatic cylinder 26 is operated in such a state that the insufficient closing operation is performed without operating the valve handle and the valve operating shaft 7 is locked, the valve operating shaft 7 is locked. However, the valve operating shaft 7 can be rotated in the direction to close the bottom valve to perform the retightening operation. Thereby, without performing the unlocking operation of the lock mechanism,
The operation of closing the bottom valve, that is, retightening can be performed.

Next, a procedure for unloading petroleum products to a gas station by a tank lorry having the above-described unloading control device will be described.

When the tank truck arrives at the gas station, the driver turns on the power of the control unit 13 provided in the driver's cab and inserts the shipping information card into the card reader of the control unit 13. As a result, the type and quantity of petroleum products to be unloaded at the gas station are read into the storage unit in the control unit 13.

Next, the worker connects one end of the hose 16 to the tip of the common pipe 5, and connects the other end of the hose 16 to one of the connection parts 17a to 17f of the underground tank oil supply pipe to supply the oil. The oil type code assigned to the pipe is read by the portable terminal 10 equipped with a code reader, and the data of the read oil type code is transmitted or stored by radio or light in the storage unit in the control unit 13. In this state, the worker climbs up the tank 1 and causes the portable terminal 10 to read the oil type code attached to the hatch corresponding to the oil type. Then, the control unit 13 checks whether or not the oil type of the underground tank oil supply pipe to which the hose 16 is connected matches the oil type in the hatch, and determines whether the unloading is appropriate.

If the type of oil to be unloaded is appropriate, the operator is notified to the portable terminal 10 held by the operator, and the operator operates a key on the terminal 10 so that the shut-off valve 11 is automatically activated. Is opened. In this state, when the operator operates the bottom valve handle corresponding to the specific hatch portion to open the bottom valve, the petroleum products in the predetermined hatch portion pass through the common pipe 5 and the hose 16. It is supplied into the underground tank and unloaded. When the unloading is completed, the operator operates the bottom valve handle to close the bottom valve. When the operation of closing the bottom valve is completed, the pneumatic cylinder of the lock mechanism is operated by operating the terminal 10, and the valve operating shaft is locked.

Even if the lock is completed, if the bottom valve handle is rotated in the direction in which the bottom valve is closed in order to check whether or not the bottom valve is completely closed, the bottom valve handle will be closed. Since it can be rotated in the direction, even if insufficient tightening occurs, it can be surely checked again. By performing these operations for all the predetermined oil types, the unloading operation for one gas station is completed.

(Embodiment 2) FIGS. 5 to 7 show a lock mechanism 21 in an unloading control apparatus according to another embodiment of the present invention. The lock mechanism is a hatch portion shown in FIG. It is attached corresponding to each of 3a to 3g.

The lock mechanism 21 has a substrate 32 mounted on the upper surface of the tank unit 1, and a single-acting pneumatic cylinder 33 is mounted on the substrate 32, and the pneumatic cylinder 33 is capable of moving forward and backward in a linear direction. A moving member 36 having a locking claw 35 is
Has been fixed. A guide member 37 is fixed to the substrate 32 in order to guide the movable member 36 so as to be slidable in a linear direction. The movable member 36 is moved to a forward limit position shown by a solid line in FIG. Move in the rectilinear direction between the retreat limit position, ie, the retreat position indicated by.
The illustrated pneumatic cylinder 33 is a single-acting type, and the moving member 36 is moved to the lock position by the spring force of a spring incorporated therein, and by supplying compressed air,
It is returned to the retracted position shown by the two-dot chain line, that is, the unlocked position, against the spring force. However, each of the pneumatic cylinders 26 and 33 is a double-acting cylinder,
The linear movement of the piston rods 27, 34 may be driven by compressed air.

A bottom valve handle 8 is provided at the upper end of the valve operating shaft 7 as in the above-described embodiment, and an inner rotating body 41 is attached to the valve operating shaft 7 as a first rotating body. . An annular rotator 42 is rotatably fitted on the outer side of the inner rotator 41 as a second rotator, and a sprocket 43 is formed on the outer peripheral portion of the annular rotator 42 as a meshing portion.

The moving member 36 is attached to the sprocket 43 in FIG.
When the lock position shown by the solid line is reached, the locking claws 35 are engaged, and the rotation of the sprocket 43 is stopped. A tooth portion 44 having a meshing tooth surface 44a and an inclined surface 44b is formed on the entire inner peripheral surface of the annular rotating body 42, and a locking lever 45 meshing with the meshing tooth surface 44a is rotated by a pin 46 on the inner rotating body 41. It is movably mounted. The locking lever 45 is urged by a spring member (not shown) to rotate clockwise in FIG.

The plurality of teeth 44 and the locking lever 45
And a one-way clutch mechanism 47 is formed.
Even when the rotation of the valve 2 is blocked, if the valve operating shaft 7 is rotated clockwise by the bottom valve handle, the rotation in that direction is allowed and the bottom valve can be operated in the closing direction. On the other hand, when the valve operating shaft 7 is rotated in the opposite direction, the locking lever 45 meshes with the meshing tooth surface 44a, so that the rotation of the valve operating shaft 7 is prevented, and the operation of opening the bottom valve is prevented.

In the case shown in the figure, the inner rotating body 42 has a meshing tooth surface 44a and an inclined surface 44b on the inner peripheral surface thereof, and the tooth portion 44 as a ratchet tooth is formed. Ratchet teeth may be formed on the outer peripheral surface, and the locking lever 45 may be provided on the annular rotating body 42.

In a tank truck having the lock mechanism 21 shown in FIGS. 5 to 7, the unloading operation of petroleum products can be performed in the same procedure as in the above-described embodiment.

As described above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof. Needless to say, there is.

For example, in each of the embodiments, the operation of the lock mechanism is performed by a pneumatic cylinder, but may be performed by a hydraulic cylinder. The illustrated tank truck transports petroleum products such as gasoline, but is not limited thereto. For example, liquefied gases such as LPG and liquid oxygen, chemicals such as hydrochloric acid and sulfuric acid, molasses, Food such as milk,
The present invention is also applicable to a tank truck for transporting various liquids such as animal and vegetable oils such as olive oil and coconut oil.

[0045]

Advantageous effects obtained by typical ones of the inventions disclosed in the present application will be briefly described.
It is as follows.

(1) After the operation of closing the bottom valve of the tank truck is completed, if it is found that this operation has been performed insufficiently, the valve operating shaft for operating the bottom valve is locked. Even in this state, the valve operating shaft can be rotated in the direction of tightening.

(2) Even when the valve operating shaft is locked, it can be rotated in the direction of tightening the valve operating shaft, so that safety confirmation or inspection can be easily performed.

(3) When the valve operating shaft is locked, the valve operating shaft cannot be rotated in the direction in which the bottom valve is opened. Work safety is ensured.

(4) Thus, the unloading work from the tank truck can be quickly performed without malfunction.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a tank lorry provided with an unloading control device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a lock mechanism of the unloading control device shown in FIG.

FIG. 3 is a plan view showing a state where a bottom valve handle in FIG. 2 is removed.

FIGS. 4A and 4B are enlarged plan views showing a state in which a locking claw and a ratchet claw are engaged.

FIG. 5 is a perspective view showing a lock mechanism of an unloading control device according to another embodiment of the present invention.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a front view showing a part of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank part 2 Partition plate 3a-3g Hatch part 4a-4g Unloading piping 5 Common piping 6a-6g Bottom valve 7,7a-7g Valve operating shaft 8.8a-8g Bottom valve handle 10 Portable terminal 11 Shutoff valve 12 Actuator 13 Control part 14 Pneumatic piping 15 Discharge valve 16 Hose 17a-17f Underground tank oil supply piping connection part 21, 21a-21g Lock mechanism 22 Ratchet teeth 23 Mounting plate 24 Screw member 25 Teeth part 26 Pneumatic cylinder 27 Piston rod 28 Moving member 29 Stopper 30 Locking member 31 Pneumatic piping 32 Substrate 33 Pneumatic cylinder 34 Piston rod 35 Locking claw 36 Moving member 37 Guide member 41 Inner rotating body (first rotating body) 42 Annular rotating body (second rotating body) 43 Sprocket 44 Tooth 45 Locking lever 46 Pin 47 One-way clutch mechanism

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noboru Kanai 4-26-12 Hakusan, Bunkyo-ku, Tokyo Nissho Co., Ltd.

Claims (2)

[Claims] 1. A plurality of hatch portions for accommodating a plurality of types of petroleum products for each type, a common pipe for guiding the petroleum products from each hatch portion, and a plurality of hatch portions provided for each of the hatch portions, A bottom valve that opens and closes a flow path that communicates with the common pipe, and a discharge valve that is provided at a tip of the common pipe and opens and closes a flow path in the common pipe, and refuels petroleum products in each of the hatches. An unloading control device for a tank lorry that injects through a hose connected to the common pipe into an underground tank for storing each type of oil at a location, and is connected to a valve body incorporated in the bottom valve. A bottom valve handle that is manually operated by an operator is attached to the valve operating shaft for opening and closing the valve body, a ratchet tooth attached to the valve operating shaft, and a lock position and a retracted position by a fluid pressure cylinder. Drive between A locking claw attached to the moving member to be engaged with the ratchet teeth at the lock position to prevent the valve operating shaft from rotating in the opening direction of the valve body and allowing the valve operating shaft to rotate in the closing direction. In the state where the ratchet teeth and the locking claws are engaged,
An unloading control device for a tank truck, wherein the bottom valve handle can be operated in a direction in which the valve element is closed. 2. A plurality of hatch portions for accommodating a plurality of types of petroleum products for each type, a common pipe for guiding the petroleum products from each hatch portion, a plurality of hatch portions provided for each of the hatch portions, and a A bottom valve that opens and closes a flow path that communicates with the common pipe, and a discharge valve that is provided at a tip of the common pipe and opens and closes a flow path in the common pipe, and refuels petroleum products in each of the hatches. An unloading control device for a tank lorry that injects through a hose connected to the common pipe into an underground tank for storing each type of oil at a location, and is connected to a valve body incorporated in the bottom valve. A bottom valve handle, which is manually operated by an operator, is attached to the valve operating shaft for opening and closing the valve body, and between a lock position and a retracted position by a fluid pressure cylinder disposed adjacent to the valve operating shaft. Moving part driven by A locking claw attached to the distal end of the first rotating body, a first rotating body attached to the valve actuation shaft, and a second engaging portion formed on the first rotating body and meshing with the locking claw. A rotator, provided between the first rotator and the second rotator, in a state in which the locking claw is engaged with the engagement portion and rotation of the second rotator is prevented; A one-way clutch mechanism for preventing rotation when the valve operating shaft is rotated in a direction to open the valve body by operating the bottom valve handle, while permitting the rotation when rotated in a closing direction. An unloading control for a tank truck, wherein the bottom valve handle can be operated in a direction in which the valve body is closed even when the rotation of the second rotating body is blocked by the locking claw. apparatus.