JPH11157381A - Oil mixing preventing device for tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a different kind of oil from being discharged to oil assigned to a storage tank positively at a low cost without using explosion-proof electrical equipment. SOLUTION: When a kind of oil stored in a partition chamber of a tank is assigned, an air control valve 6 corresponding to the assigned kind of oil is opened. In this state, in a service station, one end of an air supply pipeline 5 is connected to an oil kind connector 8 provided at each storage tank through a plurality of connecting air pipelines 90 assigned evey kind of oil. Only in the case of the assigned kind of oil coinciding with the kind of oil assigned to the storage tank, air from an air tank AT is supplied to the air supply pipeline 5 corresponding to the kind of oil, through the oil kind connector 8. The air is therefore supplied to an air cylinder 43 of a bottom valve locking means through the opened air control valve 6, and the oil can be discharged through a bottom valve provided at the bottom part of the partition chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an oil liquid mounted on a tank lorry, which is injected into a storage tank of a gas station, where different types of oil liquid are mixed into the oil liquid stored in the storage tank. The present invention relates to a device for preventing oil mixture of a tank lorry, which prevents the oil from being mixed.

[0002]

2. Description of the Related Art Conventionally, tanks of tank trucks have been
It is divided into a plurality of compartments so that different types of oil liquids such as regular gasoline, high octane gasoline, kerosene, light oil and the like can be individually accommodated. A bottom valve for unloading the oil liquid is provided at the bottom of each of the plurality of compartments, and the opening operation of each bottom valve is individually regulated by bottom valve locking means. The bottom valve locking means includes a lock member that engages with a handle or the like for opening and closing the bottom valve to restrict rotation of the handle, and an air cylinder that releases the engagement of the lock member. I have. The air cylinder is supplied with air from an air tank by operating a manual opening / closing valve provided on a side surface of the vehicle body or the like, and the supply of the air drives a lock member to release the engagement with a handle or the like. Thus, the handle can be rotated, the bottom valve is opened, and the oil liquid stored in the compartment can be injected into a storage tank provided underground at a gas station or the like.

However, according to the above-mentioned tank truck, if the manual opening / closing valve is erroneously opened, a problem arises in that an oil different from the oil to be injected is injected into the storage tank. Thus, the type of oil liquid stored in each compartment is electrically identified and displayed, and the type of oil liquid stored in each compartment and the type of oil liquid assigned to the storage tank are electrically determined. Various oil-mixing prevention devices have been proposed to prevent different types of oil liquids from being injected into the storage tank by collation (for example, JP-A-59-84794, JP-A-Heisei 1-84). -226596, JP-A-1-226593).

[0004]

However, since the tank lorry handles highly volatile oil such as gasoline, electric components such as control circuits and switches of the oil mixture prevention device are explosion-proof type. The problem is that the cost is high. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an oil mixture for a tank truck that can reliably and inexpensively prevent different types of oil liquids from being mixed into the oil liquid allocated to the storage tank. It is an object to provide a prevention device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, an oil mixing prevention device for a tank truck according to the present invention individually controls the opening operation of a bottom valve provided for each compartment of a tank of a tank truck. An on-vehicle vehicle having a pneumatically operated bottom valve locking means, a plurality of main pipes allocated for each oil type, and a branch pipe branched from the main pipe for each compartment and connected to each bottom valve locking means. When the oil type is specified by the oil type designation member assigned to each oil type, the oil type is interposed in the middle of each branch pipe and the side air supply pipe, and only the branch pipe corresponding to the specified oil type is communicated. An air control valve of a mechanical operation type capable of releasing a release operation restriction of the bottom valve by the bottom valve locking means, an air tank mounted on the tank truck, and a storage tank of a gas station, provided for each storage tank,
An oil type connector having an input port for introducing air from the air tank, an output port connected to the input port, and having a different installation position for each oil type assigned to the storage tank, and an oil type connector assigned to each oil type. A plurality of connection air pipes are provided, one end of each connection air pipe is connected to the main pipe of the air supply pipe for each oil type, and the other end of each connection air pipe is connected to a pipe. The oil type connector is connected collectively to the oil type connector via a connector, and in this connection state, a connection air pipe corresponding to the oil type assigned to the storage tank includes a connector communicating with the output port of the oil type connector. It is characterized by the following.

According to the oil mixing prevention device for a tank lorry vehicle having the above structure, for example, in an oil depot, when the type of the oil liquid contained in each compartment of the tank of the tank lorry is specified by an oil type specifying member, this specification is made. Only the branch pipe corresponding to the selected oil type is communicated, and air supply to the bottom valve locking means through the branch pipe is allowed. Next, at the gas station, when the pipe connector of the connector is connected to the oil type connector provided in the storage tank to be unloaded, the type of the oil liquid to be unloaded and the type of the oil liquid assigned to the storage tank If they match, the connection air pipe corresponding to the type of the oil liquid communicates with the output port of the oil type connector, and the air supplied from the air tank to the input port of the oil type connector is The air can be supplied to the air supply pipe through the connection air pipe connected to the output port. As a result, the air is supplied to the corresponding bottom valve locking means through the connected branch pipe, and the restriction on the release operation of the bottom valve by the bottom valve locking means is released. As a result, only the bottom valve containing the oil liquid corresponding to the oil type specified by the oil type specifying member can be opened.

On the other hand, when the type of the oil liquid to be unloaded and the type of the oil liquid in the storage tank do not match, that is, when the piping connector of the connector is connected to a storage tank different from the storage tank to be refueled. If the oil type connector provided in the tank is erroneously connected, a connection air pipe for an oil type different from the oil type of the storage tank communicates with the output port of the oil type connector. However, since the air supply pipe is blocked by the air control valve, air cannot be supplied to the corresponding bottom valve locking means. Therefore, the bottom valve of the compartment in which the different type of oil liquid from the storage tank is stored cannot be opened.

In the oil mixing prevention device, the connecting air pipe of the connector is connected to the air supply pipe via a pair of pipe connectors connected to each other, and the air tank is connected to the pipe connector on the air supply pipe side. It is preferable that air be supplied to an input port of the oil type connector via the piping connector and the connection tool (claim 2). In this case, it is possible to simultaneously connect the connection air pipe to the air supply pipe and the oil type connector and supply air to the input port of the oil type connector.

[0009]

FIG. 5 is a schematic view showing a tank lorry to which the present invention is applied, which will be described in detail below with reference to the accompanying drawings. In FIG. 1, a tank 2 is mounted on a body 1a of a tank truck 1. The inside of the tank 2 is capable of individually storing four types of oil liquids of regular gasoline, high octane gasoline, kerosene, and light oil. The partition 2a is partitioned into a plurality of compartments 2b. In addition, each compartment 2
At the top of each b, a manhole 2c for injecting the oil liquid into each compartment 2b and a manhole cover 2d for closing the manhole 2c so as to be openable are provided.

At the bottom of each compartment 2b of the tank 2,
A bottom valve 3 for unloading the stored oil liquid is provided. Each bottom valve 3 is provided with a handle 32 provided at the top of each compartment 2b via a valve shaft 31 passing through each compartment 2b.
By turning the handle 32 in a counterclockwise direction, the bottom valve 3 is raised together with the handle 32 via the valve shaft 31 to allow the oil liquid to be discharged, and the handle 32 is turned clockwise. By turning, the bottom valve 3 is lowered to regulate the discharge of the oil liquid. Each bottom valve 3
Is connected to the centralized pipe P1, and the oil liquid discharged from each compartment 2b is provided in the basement of a gas station through the unloading hose H connected to the centralized pipe P1 and its end. The plurality of storage tanks T are selectively injected.

Referring also to FIGS. 1 to 4, the oil mixing prevention device applied to the tank truck 1 includes a bottom valve locking means 4 for individually regulating the opening operation of the bottom valve 3, and a tank truck 1. A plurality of air supply pipes 5 mounted and assigned to each oil type, an air control valve 6 interposed in the middle of each air supply pipe 5, and an oil type designation member assigned to each oil type A plurality of oil type cards X, an air tank AT mounted on the tank truck 1, an oil type connector 8 provided for each storage tank T at a gas station, an air supply pipe 5 and an oil type connector 8. A main part is constituted by the connecting tool 9 to be connected.

As shown in FIG. 2, the bottom valve lock means 4 includes a pinion gear 41 fixed to the valve shaft 31, a rack gear 42 as a lock member engaged with the pinion gear 41, and a pinion gear. An air cylinder 43 for releasing the engagement of the rack gear 42 with the rack gear 41 is provided. The pinion gear 41 is provided immediately below the handle 32. The rack gear 42 is fixed to the distal end of the cylinder rod 43 a of the air cylinder 43 in a state where the rack gear 42 meshes with the pinion gear 41. The air cylinder 43 is fixed to a bracket 44 erected on the top of the tank 2. The rear chamber 43b of the air cylinder 43 is provided with a spring 43d for urging the piston 43c. By the urging force of the spring 43d, the meshing state between the rack gear 42 and the pinion gear 41 is maintained, and in this meshing state, the rotation of the handle 32 is restricted. Further, by supplying air to the front chamber 43e of the air cylinder 43, the meshing state is released, and the rotation of the handle 32 can be permitted.

The air supply pipe 5 has a first air supply pipe 51 assigned for regular gasoline, a second air supply pipe 52 assigned for high octane gasoline, and a third air supply pipe 5 assigned for kerosene.
3. Fourth air supply pipe 54 assigned for light oil
It has. Each air pipe 51, 52, 53, 54
The main pipes 51a, 52a, 53a, and 54a and each main pipe 5
Branch pipes 51b, 52b, 53b, 54b branch from 1a, 52a, 53a, 54a for each compartment 2b. One end of each of the branch pipes 51b, 52b, 53b, 54b is a bottom valve lock of each compartment 2b. The front chamber 43 of the air cylinder 43 is collected in units of the compartments 4 in units of each compartment 2b.
e. In addition, each main pipe 51a, 52a,
A first piping connector C1 for connecting the connection tool 9 is connected to the other ends of 53a and 54a. This first piping connector C1 is a block-shaped unit made of a single product.

The air control valve 6 is interposed in the middle of each of the branch pipes 51b, 52b, 53b and 54b of the air supply pipe 5. The air control valve 6 is constituted by a spring offset type 3 port 2 position switching valve.
Normally, the air is supplied to the air cylinder 43 of the bottom valve locking means 4 through the branch pipes 51b, 52b, 53b, and 54b by taking a shut-off position by a spring force. The air control valve 6 is of a mechanical operation type that can be switched by rotating an operation arm 61 with a roller 62. The air control valve 6 is
Hatch box HB fixed to each manhole cover 2d
(See FIG. 6).

As shown in FIG. 4, the oil type card X has a protruding piece X2 formed at the tip of a base X1, and the forming position of the protruding piece X2 differs for each oil type. The oil type card X is color-coded so that the oil type assigned to the card X can be identified. The hatch box HB is provided with a pocket PK for inserting the oil type card X, and the roller 62 of the air control valve 6 faces the pocket PK (see FIG. 8). . By inserting the oil type card X into the pocket PK of the hatch box HB, the type of the oil liquid stored in the compartment 2b immediately below the hatch box HB can be designated.
Thereby, the roller 62 of the air control valve 6 is selectively pressed by the protruding piece X2 of the oil type card X, and the air control valve 6 is switched to the open position.

The oil type connector 8 is fixed to each lubrication port T1 of the storage tank T, and is connected to the air tank AT
And an output port 82 selectively connected to the input port 81 via an internal passage 83. The input port 81 and the output port 82 are provided on the same plane. Also,
The arrangement position of the output port 82 is different for each oil type assigned to each storage tank T (see FIG. 9). In FIG. 9, (a) shows the oil type connector 8 for regular gasoline, (b) shows the oil type connector 8 for high octane gasoline, (c) shows the oil type connector 8 for kerosene, and (d) ) Indicate oil type connectors 8 for light oil.

The connecting member 9 includes a plurality of connecting air pipes 90.
It has. This connection air pipe 90 is connected to the first connection air pipe 9 assigned for regular gasoline.
1, a second connection air pipe 92 assigned for high octane gasoline, a third connection air pipe 93 assigned for kerosene, and a fourth connection air pipe 94 assigned for light oil, A fifth connection air pipe 95 for supplying air from the air tank AT to the input port 81 of the oil type connector 8. The connection air pipe 90 is made of a flexible pipe, and has an end portion connected to the first pipe connector C1.
A second pipe connector C2 connected to the air supply pipe 51 is connected to the air supply pipes 51 to 54 via the first pipe connector C1 and the second pipe connector C2. Are connected collectively while maintaining the characteristics. At this time, the first connection air pipe 91 allocated for regular gasoline is used as the first air supply pipe 51 similarly allocated for regular gasoline.
And a second connection air pipe 92 assigned for high-octane gasoline is connected to a second air supply pipe 52 also assigned for high-octane gasoline, and a third connection air pipe assigned for kerosene. The air pipe 93 is connected to the third air supply pipe 53 also assigned for kerosene, and the fourth connection air pipe 94 assigned for light oil is connected to the fourth air supply pipe 54 also assigned for light oil. Connected to. Also,
Fifth connection air pipe 9 assigned for air supply
Reference numeral 5 is connected to the air tank AT via the first piping connector C1. Note that an on-off valve V is interposed between the first pipe connector C1 and the air tank AT.

The other end of the connection air pipe 90 is connected to a third
It is collectively connected to the oil type connector 8 via the piping connector C3. As shown in FIG. 10, a connection surface C31 of the third piping connector C3 with respect to the oil type connector 8 includes:
Input ports 96 a to 96 d selectively communicating with the output port 82 of the oil type connector 8 and an output port 97 communicating with the input port 81 of the oil type connector 8 are provided. The input port 96a is a first port for regular gasoline.
The input port 96b is communicated with the connection air pipe 91,
The input port 96c is connected to a third connection air pipe 93 for kerosene, and the input port 96c is connected to a fourth connection air pipe 94 for light oil. Is communicated to.

With the above configuration, for example, in an oil depot, the oil type card X corresponding to the type of the oil liquid stored in each compartment 2b of the tank truck 1 is stored in the pocket PK of the hatch box HB of each compartment 2b. To specify the type of oil contained in each compartment 2b, the air control valve 6 for the specified type of oil can be switched to the open position. As a result, the supply of air to the air cylinder 43 of the bottom valve locking means 4 can be permitted only through the air control valve 6. In other words, when the oil liquid stored in a certain compartment 2b is, for example, regular gasoline, the regular gasoline oil type card X is inserted into the pocket PK, so that only the first gas supply pipe 51 for regular gasoline is used. Through which the air can be supplied to the air cylinder 43 of the bottom valve locking means 4.

Next, at the gas station, the second connection tool 9
When the pipe connector C2 is connected to the first pipe connector C1 and the third pipe connector C3 of the connector 9 is connected to the oil type connector 8 provided in the storage tank T to be unloaded, the unloading is attempted. If the type of the oil liquid (hereinafter, the description in parentheses indicates the case of regular gasoline) and the oil type assigned to the storage tank are the same, the oil type corresponding to the oil type in the connection air pipe 90 is used. One of the pipes (the first connection air pipe 91) communicates with the output port 82 of the oil type connector 8, and the fifth connection air pipe 95 communicates with the input port 81 of the oil type connector 8. In this state, the on-off valve V between the first pipe connector C1 and the air tank AT is operated to operate the air tank A.
When air is supplied from T, the fifth connection air pipe 95
Air is supplied to the input port 81 of the oil type connector 8 through the outlet port, and the supplied air is supplied to the output port 82 of the oil type connector 8 and the connection air pipe 90 (the first connection air The air can be supplied to the air supply pipe 5 (first air supply pipe 51) through the pipe 91). Thereby, air is supplied to the air cylinder 43 of the bottom valve locking means 4 through the air control valve 6 (the air control valve 6 interposed in the first air supply pipe 51) switched to the open position, and the air is supplied to the storage tank T. The turning operation of the handle 32 is allowed only for the compartment 2b in which the same type of oil liquid as the stored oil liquid is stored. Therefore, by rotating the handle 32, the bottom valve 3 is opened via the valve shaft 31 and only the same type of oil liquid as the oil type assigned to the storage tank T is unloaded from the compartment 2b. can do. After unloading, the bottom valve 3 is closed by turning the handle 32, and the oil type card X is removed. As a result, the air control valve 6 switches to the shut-off position, the air in the air cylinder 43 is released to the atmosphere, and the handle 32 switches again to the locked state.

On the other hand, the third piping connector C3 of the connector 9
To a storage tank T different from the storage tank T that should be refueled.
If the oil type connector 8 provided in the storage tank T for kerosene is erroneously connected (the description in parentheses below indicates the case of the kerosene storage tank T), a connection for an oil type different from the oil type assigned to the storage tank T is made. Air pipe 90 (third connection air pipe 9
3) communicates with the output port 82 of the oil type connector 8. However, the air supply pipe 5 (third air supply pipe 53) communicated with the output port 82 via the connection air pipe 90 (third connection air pipe 93) has an air control pipe interposed in the middle thereof. Since the pipe is blocked by the valve 6, air cannot be supplied to the air cylinder 43 of the bottom valve locking means 4 through the air supply pipe 5. Here, since the bottom valve 3 corresponding to the bottom valve locking means 4 cannot be opened, it is prevented that an oil liquid of a type different from the oil type assigned to the storage tank T is injected into the storage tank T. can do.

The above oil mixture preventing device is provided with a second pipe connector C
2 can be connected to the first pipe connector C1, and at the same time, the air tank AT can be connected to the fifth connection air pipe 95 via the first pipe connector C1, so that the air tank AT and the oil type connector 8 are separately connected. Work is not required. Therefore, the labor of the unloading work is reduced.

The oil mixing prevention device for a tank truck of the present invention is not limited to the above-described embodiment.
The air in the air tank AT is supplied directly to the oil type connector 8 using an air pipe independent of the connector 9, and the connection air pipe 90 uses the second pipe connector C 2 and the first pipe connector C 1. Air supply piping 5 without
Various design changes can be made, such as being always connected to the server.

[0024]

As described above, according to the first aspect of the present invention, the type of oil contained in the compartment of the tank is mechanically designated by the oil type designation member. As a result, the air control valve is driven mechanically, and air can be supplied only to the air supply pipe corresponding to the type of oil liquid on the storage tank side with the connector. Since air is supplied to the pneumatically operated bottom valve locking means corresponding to the compartment containing the oil liquid to release the regulation of the opening of the bottom valve by the bottom valve locking means, different types of oil are used. It is possible to reliably prevent the liquid from being mixed, and it is not necessary to use any explosion-proof electrical equipment, and the cost of the apparatus can be reduced.

According to the second aspect of the present invention, the air pipe for connecting the connecting tool is connected to the air supply pipe and the oil type connector at the same time as the input port of the oil type connector. Supply becomes possible,
The unloading operation of the oil liquid becomes easy.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of an oil mixture prevention device of the present invention.

FIG. 2 is a sectional view showing a bottom valve locking means.

FIG. 3 is a partially cutaway plan view showing a bottom valve locking means.

FIG. 4 is a plan view showing an oil type card.

FIG. 5 is a schematic view showing a tank truck.

FIG. 6 is a plan view showing the vicinity of the top of the tank.

FIG. 7 is a schematic front view showing a state where an oil type card is inserted into a pocket portion.

FIG. 8 is a schematic plan view of FIG. 7;

FIG. 9 is a schematic view showing an arrangement state of output ports of the oil type connector.

FIG. 10 is a schematic view showing an end surface of a pipe connector of the connection tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank truck 2 Tank 2b Compartment room 3 Bottom valve 4 Bottom valve locking means 43 Air cylinder 5 Air supply piping 51a-54a Main piping 51b-54b Branch piping 6 Air control valve 8 Oil type connector 81 Input port 82 Output port 9 Connector 90 Air piping for connection C1 First piping connector C2 Second piping connector C3 Third piping connector X Oil type card (oil type specifying member) AT Air tank

Claims (2)

[Claims] 1. A pneumatically operated bottom valve locking means for individually restricting an opening operation of a bottom valve provided in each compartment of a tank of a tank truck, and a plurality of main pipes allocated for each oil type. A vehicle-side air supply pipe having a branch pipe branched from the main pipe for each compartment and connected to each bottom valve locking means, and an intermediate part of each branch pipe, which is allocated to each oil type. When the oil type is designated by the oil type designating member, only a branch pipe corresponding to the designated oil type is communicated, and a mechanical operation type air control valve capable of releasing the release operation restriction of the bottom valve by the bottom valve locking means. An air tank mounted on the tank truck, an input port provided for each storage tank at a gas station, and an air port for introducing air from the air tank, and connected to the input port and assigned to the storage tank. An oil type connector having an output port having an arrangement position different for each oil type, and a plurality of connection air pipes assigned to each oil type,
One end of each connection air pipe is connected to the main pipe of the air supply pipe for each oil type, and the other end of each connection air pipe is collectively connected to the oil type connector via a pipe connector. In this connection state, the connection air pipe corresponding to the oil type assigned to the storage tank is provided with a connector communicating with the output port of the oil type connector. apparatus. 2. The air pipe for connection of the connecting tool is connected to the air supply pipe via a pair of pipe connectors connected to each other, and the air tank is connected to a pipe connector on the air supply pipe side. 2. The oil mixing prevention device for a tank truck according to claim 1, wherein air is supplied to an input port of the oil type connector through the piping connector and the connection tool.