JPH11324037A - Liquid storage device and cut-off valve therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a cut-off valve in common which works smoothly in an earthquake and securely prevents a liquid content in a storage container from leaking out. SOLUTION: A cut-off valve 10 of a liquid storage device having an earthquake-detection type cut-off function is constituted of a valve seat 19 formed at the upward opening of an elbow 18 connected to a flange 8 provided at the inside of an intake 3, a packing 20 provided at the upper face of the valve seat 19, a specified number of guide shafts 21 provided so as to rise upward at the outer peripheral flange of the valve seat 19, a valve body 22 guided along an inscribed circle of the guide shafts and vertically moved, and a valve body metal holder 24 provided to penetrate the center of the cap 23 fixing the upper end side of the guide shafts 21 and fixed to the upper part of the valve body 22. A connecting wire 16 is connected in between the upper end of the valve body metal holder 24 and the other end of a driving part 14. The outside diameter Db of the valve body 22 of the cut-off valve 10 corresponding to the intake 3 having a different inside diameter of 1/2D-D is unified to D, then, the guide shaft 21, the valve body 22, the cap 23, and valve body metal holder 24 are shared as parts for D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid storage device for storing liquids represented by a water storage tank for receiving tap water, or a chemical storage container or a liquid fuel storage tank, and a shutoff valve thereof.

[0002]

2. Description of the Related Art A conventional liquid storage device, for example, a water storage tank for water supply which is disposed at a high place such as a hill or the like, is disclosed in Japanese Utility Model Publication No.
As shown in Japanese Patent Publication No. 29909, a valve body which is guided up and down by two guide shafts inside a water storage tank to open and close a water supply port, a winch which winds up the valve body at the upper part of the water storage tank, and which falls when an earthquake of a certain seismic intensity or higher occurs. Some have a seismic sensor to release the lock of the winch and close the water supply port with a valve when an earthquake occurs. On the other hand, in the water storage tank installed on the roof of an apartment house or building, tap water once stored is supplied to each room through a water pipe connected to the water storage tank. Even if no consideration is given, if there is no breakage in the piping of the water storage tank, it will help to secure drinking water when the water in the water storage tank is cut off when a large earthquake occurs.

[0003] In recent years, seismic detection type shut-off valves have been installed in water distribution pipes as water storage tanks for receiving water.
As shown in a fifth embodiment of Japanese Patent Publication No. 28-28, a spherical valve element guided by a guide formed of a punching metal or a wire mesh or the like, as shown in a sixth embodiment, suspended from a rope. Provide a shut-off valve equipped with an inverted truncated cone-shaped valve body and automatically close the shut-off valve when an earthquake of a predetermined seismic intensity or higher occurs to prevent leakage of tap water stored in the water storage tank There are things that try to. In normal times, the water storage tank functions as a part of a water pipe, distributes tap water to each section (houses, etc.), and automatically shuts off the shut-off valve when an earthquake of a specified seismic intensity or higher occurs. The water inside will be stored water.

[0004]

SUMMARY OF THE INVENTION In the case of a water storage tank,
When the Great East Japan Earthquake occurs, the water in the water storage tank is a valuable water source for the victims, so it is important that the shutoff valve can be shut off reliably and drinking water can be secured. In the case of chemical storage tanks and oil storage tanks as well, from the viewpoint of ensuring safety, it is necessary to minimize leakage of liquid storage materials during an earthquake and to store liquids due to other causes such as fire or aging pipes. It is also important to prevent leakage of things.
Conventional liquid storage devices include one in which an earthquake detection unit is separately fixed on a gantry (see Japanese Utility Model Application Laid-Open No. 64-31265) and one in which a control unit and a drive unit of the entire device are provided on the upper surface of a water storage tank. However, there is a problem that the connection is troublesome, the device itself has a large installation area and is large, and there is a problem that the position of the control unit and the drive unit is high during operation, making it difficult to see and operate.

On the other hand, the former water storage tank provided with an earthquake detection type shut-off valve is not suitable for a water storage tank for receiving water, but is originally large-sized, and the valve element is constituted by two guide shafts. When opening and closing the water inlet that is guided up and down, it requires a flange to be inserted into the guide shaft to prevent tilting,
Up and down movements were also likely to be unsmooth. Also, in the latter water storage tank for receiving water, the one that guides a spherical valve element with a guide formed by punching metal or wire mesh, etc., has a large contact resistance, so the vertical movement of the valve element is not smooth. When the inverted frustoconical valve element is suspended via a rope, the valve body is slightly tilted, and the valve seat and the valve element are not concentric. There was a drawback.

As another example, a tubular guide is generally used to smoothly move the valve body up and down to guide the valve body to the valve seat, and a cylindrical guide is used to supply water to the valve seat. A hole for water flow is provided above the surface of the valve seat on the side surface of the guide. However, a valve is provided for the two guide shafts shown in the conventional example and the guide guide formed by punching metal or wire mesh. There was a drawback that the amount of dead water which remained in the water storage tank and could not be used effectively was increased by the amount of the water passage hole above the seat surface. Further, regarding the shutoff valve of the liquid storage device, there is no known example that considers standardization and the like.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a liquid storage medium such as valuable drinking water which is free from breakage and leakage of a container outlet even in the event of a large earthquake. It is desirable to improve the operability at the time of operation and the visibility of the liquid storage device that can secure the operation, and to have a structure that is compact and has good operability by integrating the seismic detection type shutoff valve control driving means. It is assumed that the body guide has been improved and the main parts have been standardized.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has a container having a supply port for a liquid storage material and an outlet for storing the liquid storage material, a shut-off valve for shutting off the outlet inside the outlet, and an outlet. A pump that sends a liquid storage product through a water pipe to the outside of the device, a seismic device that outputs a seismic signal when a predetermined earthquake vibration occurs, a control unit that outputs a control signal that controls the entire device such as a shutoff valve and a pump, A drive unit for driving the shut-off valve in response to a signal from the control unit, usually opening the shut-off valve, opening the outlet and operating the pump to take out the liquid storage, and the seismic signal output from the seismic sensor at a predetermined earthquake vibration The control unit drives the shut-off valve with the drive unit, closes the outlet, and controls the pump to stop at the same time.In the liquid storage device, the seismic sensor, the control unit, and the drive unit are integrated to form a control drive unit. Structured and mounted on the lower side of the storage container And the.

[0009] The liquid storage apparatus constructed as described above normally opens a shut-off valve, opens an outlet, operates a pump, and sends out a liquid storage material. When a predetermined earthquake vibration occurs, for example, a seismic intensity of 5 or less is set in advance. For example, during an earthquake vibration corresponding to a seismic intensity of less than 5, the seismic sensor outputs an earthquake signal, and the control unit controls the drive unit to drive the shut-off valve, close the outlet and stop the pump at the same time based on the earthquake signal. However, the control and drive unit mounted on the lower side of the storage container by integrating the seismic sensor, control unit and drive unit can be made compact, and the conventional earthquake detection unit is separately fixed on a stand. On the other hand, the connection is easy, the device itself can be made compact without increasing the installation area, and the position of the control unit and the drive unit is lower than that provided on the upper surface of the storage container, so that it is easy to see and operate.

The shutoff valve of the liquid storage device includes an elbow joined to a flange provided inside the outlet, a valve seat formed at an upward opening of the elbow, and a packing provided on an upper surface of the valve seat. A predetermined number of three or more guide shafts which are equally divided and fixed to the outer peripheral flange portion of the valve seat and are provided so as to rise upward, and are guided up and down along an inscribed circle of the guide shafts. A valve body, a cap for fixing the upper end side of the guide shaft, a valve body holding fitting penetrating through the center of the cap and fixed to the upper part of the valve body, and the other end of the upper end of the valve body holding fitting is a driving unit. The connecting wire connected to was connected.

In the shut-off valve of the liquid storage device thus constructed, the valve element is normally lifted up along the inscribed circle of the guide shaft by lifting the valve element holding bracket through the connecting wire by the driving section. Is separated from the valve seat and packing to open the shut-off valve, and when an earthquake occurs, the drive unit drops the valve body of the shut-off valve via the connecting wire according to the seismic signal, closes the packing provided on the valve seat, and closes the outlet. I do. When the shut-off valve is activated, the valve is 3
Since the guide is smoothly guided without inclining along the inscribed circle formed by more than two guide shafts, it can be smoothly moved up and down to open and shut even if the outer diameter of the valve body is large. The contact resistance is small and the up and down movement of the valve body is smooth with respect to the guide shaft formed by punching metal or wire mesh, and a cylindrical guide is used to move the valve body up and down smoothly. On the other hand, when water is supplied to the side of the cylindrical guide for supplying water to the valve seat, water up to the height of the valve seat can be used, so that dead water remaining in the water storage tank is reduced.

Also, a small 1/2 corresponding to a different outlet from a 1 / 2D having a small inner diameter to a large D having a large inner diameter.
The outer diameter Db of the valve body of the shut-off valve from D to large D should be unified for large D. As a result, the guide shaft, valve body, cap and valve body holding fittings should be shared with the large D. Just standardize and rationalize production.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a system configuration diagram of a liquid storage device according to an embodiment of the present invention, FIG. 2 is a side sectional view showing a structure of a shutoff valve of the liquid storage device, and FIG.
FIG. 3 is a plan sectional view of the shut-off valve, showing a section A;

In FIG. 1, reference numeral 1 denotes a storage container (a water storage tank, a chemical storage tank, a petroleum storage tank, etc.) for storing a liquid storage material (for example, tap water, chemicals, petroleum, etc., hereinafter referred to as water).
Hereinafter, this is referred to as a water storage tank) 2 is a tap water supply port opened at an upper part of the water storage tank 1, 3 is a water outlet opened at a lower part of the water storage tank 1, and 4 is a tap water connected to the supply port 2 A water supply pipe, 5 is a water pipe connected to the outlet 3, 6 is a water supply pump provided in the water pipe 5 for supplying water, and 7 is connected between the outside of the outlet 3 and the water pipe 5. A flexible joint for absorbing the vibration of the water pipe 5;
Is a flange attached to the inside of the outlet 3 through the flexible joint 7 and communicates the inside and the outside of the outlet 3. Reference numeral 10 denotes an earthquake detection type shutoff valve joined to the flange 8 inside the outlet 3.

Reference numeral 11 denotes a control drive unit for controlling and driving the entire liquid storage device. The control drive unit 11 outputs a seismic signal at the time of a predetermined earthquake vibration, and shuts off by the seismic signal from the seismic sensor 12. A control unit 13 that outputs control signals for the valve 10 and the pump 6, a driving unit 14 that drives the shutoff valve 10 by a signal from the control unit 13, a power supply state from the control unit 13, a shutoff valve operation, a pump stop, and the like. The water storage tank 1 is integrated with a display device 13 for receiving and displaying a signal output.
It is attached to the lower side of. 16 is one end of the drive unit 1
4 is a connection wire connected to the shutoff valve 10 at the other end. The primary power supply of the control unit 13 is an AC power supply 100V / 2.
It is a 00V switching type and the control circuit is a safe DC 12V
And a battery power supply (for example, DC 13.2 V) is provided as a backup power supply. Also,
An emergency outflow valve 17 is provided below the water storage tank 1.

In FIG. 2 and FIG. 3, the shut-off valve 10 is connected to a flange 8 provided on the inside of the outlet 3 via a foam packing 9 via, for example, an adhesive ring. A valve seat 19 formed in an upward opening and also joined via an adhesive ring;
And a predetermined number (e.g., three or eight if three or more) is provided so as to be fixed concentrically on the outer peripheral flange portion of the valve seat 19 and equidistantly fixed on the outer surface of the valve seat 19. , Four guide shafts in this embodiment),
The valve element 22 which is guided along the inscribed circle of the predetermined number of guide shafts 21 and moves up and down (in the present embodiment, a spherical body, but if it is guided along the inscribed circle of the guide shaft 21, a column And a valve seat 19 on the lower end side of the guide shaft 21.
23 for fixing the upper end side to the outer peripheral flange portion of
And the valve body holding metal fitting 2 which penetrates the center of the cap 23 and is fixed to the upper part of the valve body 22 and is connected to the connection wire 16.
4.

The water pipe 5, flexible joint 7, flange 8, foam packing 9, elbow 18, valve seat 1
Both the inner diameter of the packing 9 and the inner diameter of the packing 20 correspond to the diameter (D) of the outlet 3. Conventionally, the outer diameter of the valve body 22 is also determined in accordance with the diameter of the outlet 3. However, in this embodiment, the valve body 22 is guided along the inscribed circle of the guide shaft 21. Even if the outer diameter of the valve body 22 is larger than the diameter of the outlet 3, it can be smoothly moved up and down to open or shut off. Therefore, the diameter (D) of the outlet 3 is, for example, 50,
Within the range of 65, 80, and 100 mm, the inner diameters of the water distribution pipe 5, the flexible joint 7, the flange 8, the foam packing 9, the elbow 18, the valve seat 19, and the packing 20 are the diameters (D) (50) of the respective outlets 3. , 65,80,100
mm), but the outer diameter (Db) of the valve body 22 and the inner diameter at the lower end side of the guide shaft 21 fixed to the outer peripheral flange of the valve seat 19 and the guide fixed to the cap 23. The inner diameter on the upper end side of the shaft 21 is shared with the 100 mm dimension corresponding to the diameter of the large 100 mm outlet 3. Therefore, the guide shaft 21, the valve body 22, the cap 23
Also, the valve body holding bracket 24 was shared with the one for 100 mm.

Hereinafter, the operation of the present embodiment having the above configuration will be described. In normal times, the water storage tank 1 functions as a part of a water pipe, tap water enters from the supply pipe 4, the control unit 13 does not operate the driving unit 14, and the valve body of the shutoff valve 10 via the connection wire 16. Water is passed through the outlet 3 with the 22 raised, and the pump 6 is operated to be distributed from the water distribution pipe 5 to each section (home, etc.) via the pump 6. At the time of the earthquake, for example, if the seismic intensity is set to less than 5 in advance, the seismic sensor 12 outputs a seismic signal at the time of the seismic vibration with the seismic intensity of less than 5, and the control unit 13 drives the driving unit 14 by the seismic signal, The valve body 22 of the shut-off valve 10 is dropped via the connecting wire 16 to make the valve seat 1
The pump 6 is controlled so that the pump 6 is stopped at the same time that the outlet 3 is closed by bringing the packing 6 into close contact with the packing 20 provided at 9.

Accordingly, when a large earthquake having a seismic intensity of 6 or less, such as damage to water pipes and gas pipes, occurs, the impact is large, and the water distribution pipe 5 downstream of the pump 6 is often destroyed. Since water is not sent from the pump 6 to the front, water leakage can be prevented, and the water pipe 5 is hard to be broken because a large-diameter, heavy-weight shut-off valve is not used as in the prior art.
Even if the water distribution pipe 5 between the pump and the pump 6 or the vicinity thereof is broken, the shut-off valve 10 inside the outlet 3 is closed, so that water leakage from the water storage tank 1 can be stopped. Drinking water can be secured. Furthermore, by connecting a flexible joint 7 that absorbs vibration of the water distribution pipe 5 between the outside of the outlet 3 and the water distribution pipe 5, the flexible joint 7 receives the vibration of the water distribution pipe 5 when receiving an impact during a large earthquake. By absorbing water, it is possible to prevent a large stress from acting on the water storage tank 1, so that it is possible to prevent breakage around the water storage tank 1 main body and the outlet 3.

Since the control drive unit 11 is provided on the lower side surface of the water storage tank 1 (storage container), it is located at a low position, so that it is easy to operate and easy to see. Further, the control drive unit 11 is configured by integrating the control unit 13, the drive unit 14, and the display device 13, and the control unit 13 includes the power supply status, the operation of the seismic sensor 12, and the drive unit 1.
Since a signal such as 4 start, pump 6 stop, etc. is also output to the display device 13, it is possible to reduce the number of assembling steps, make it compact, easily understand the operation status, and separately fix the conventional earthquake detection unit on a stand. Or, as in the case where the control unit and the drive unit of the entire apparatus are provided on the upper surface of the water storage tank, the drawbacks that the connection is troublesome and the apparatus itself becomes large, and that the operation is difficult and difficult to see are solved.

Further, as described above, the shut-off valve 10 can surely prevent water leakage, and has a very simple structure and a small capacity, so that a large-capacity emergency power supply is not required despite being electrically driven. Therefore, equipment costs and maintenance costs can be significantly reduced. Further, since the control unit 13 is provided with a backup power supply, the shut-off valve 10 operates reliably even in the event of a power failure in the event of an earthquake, which is safer. In addition, the power outage continues after the earthquake
Can not be operated, the drinking water in the water storage tank 1 can be taken out and used via the emergency outflow valve 17 provided at the lower part of the water storage tank 1.

When the shut-off valve 10 is operated, the valve body 22 is
1 is smoothly guided without inclining along the inscribed circle, so that even if the outer diameter of the valve body 22 is large, it can be smoothly moved up and down to open and shut, and the conventional two guide shafts,
Like a guide formed by punching metal or wire mesh, the contact resistance is large and the vertical movement of the valve does not become smooth, and a cylindrical guide is used to smoothly move the valve up and down, Like a tubular guide with holes for water passage on the side of the cylindrical guide to supply water to the valve seat,
It also eliminates the disadvantage that more water remains in the water tank.

The diameter (D) of the outlet 3 is, for example, 5
Within the range of 0, 65, 80, and 100 mm, the inner diameters of the water pipe 5, the flexible joint 7, the flange 8, the foam packing 9, the elbow 18, the valve seat 19, and the packing 20 correspond to the corresponding dimensions 50, 65, 80, respectively. The outer diameter (Db) of the valve body 22, the inner diameter of the lower end of the guide shaft 21 fixed to the outer peripheral flange of the valve seat 19, and the inner diameter of the upper end of the guide shaft 21 fixed to the cap 23 Is used in common with the large 100 mm size, so for example, four types of shutoff valves 1 for 50, 65, 80, and 100 mm
0, the flange 8, the foam packing 9, the elbow 18 and the valve seat 19 are 50, 65, 80 and 100 m respectively.
m, but the guide shaft 21, the valve body 22, the cap 23 and the valve body holding bracket 24 are 100 mm.
Can be prepared, and standardization can streamline production.

[0024]

According to the present invention, there is provided a container having a supply port for a liquid storage material and an outlet for storing the liquid storage material, a shutoff valve for shutting off the outlet inside the outlet, and an outer valve outside the outlet. A seismic sensor that outputs a seismic signal at the time of a predetermined earthquake vibration, a control unit that outputs a control signal for controlling the entire device such as a shutoff valve and a pump, and a control unit. And a drive unit that drives the shut-off valve in response to a signal from the operator.Normally, the shut-off valve is opened, the outlet is opened, and the pump is operated to take out the liquid storage material. In the liquid storage device that controls the shut-off valve by the drive unit to close the outlet and stop the pump at the same time, the control unit is configured by integrating the seismic sensor, the control unit, and the drive unit. Since it was attached to the lower side of the storage container, Opens the shut-off valve, opens the outlet and operates the pump to send out the liquid storage.At the time of a predetermined earthquake vibration, the seismic sensor outputs a seismic signal, and the control unit drives the shut-off valve by the drive unit based on the seismic signal. It can be controlled to stop the pump at the same time as the outlet is closed, to secure drinking water when the liquid storage is tap water, and to store liquid when the liquid storage is chemical or petroleum. The control drive unit can be made compact with a small number of assembling steps, and has a very simple structure and a small capacity.It is installed on the upper surface of the storage container. It is possible to provide a liquid storage device that is easier to see and operate, can occupy a smaller area than those separately installed on the floor, and can greatly reduce equipment costs and maintenance costs.

An elbow for joining the shut-off valve to a flange provided inside the outlet, a valve seat formed at an upward opening of the elbow, a packing provided on the upper surface of the valve seat, A predetermined number of three or more guide shafts which are fixed to the outer peripheral flange portion by being equally divided into concentric circles and provided so as to stand up; a valve body which is guided along an inscribed circle of the guide shafts and moves up and down; A connection in which a cap for fixing the upper end side of the guide shaft, a valve body holding metal fitting penetrating through the center of the cap and fixed to the upper part of the valve body, and the other end connected to the upper end of the valve body holding metal metal part are connected to the drive unit Since the wires are connected, the drive unit normally opens the shut-off valve via the connecting wire, and when an earthquake occurs, shuts off the shut-off valve securely via the connecting wire according to the seismic signal. Do not lean along the inscribed circle formed by the axis Because it is guided smoothly, it can move up and down and open and shut smoothly even if the outer diameter of the valve is large. Like a conventional two guide shaft, a guide formed by punching metal or wire mesh, etc. ,
The contact resistance is large and the vertical movement of the valve body does not become smooth, and a cylindrical guide is used to smoothly move the valve body up and down, and the side surface of the cylindrical guide to supply water to the valve seat Since there is less dead water remaining in the water storage tank than in the case where a water hole is provided, there is an effect that more drinking water can be secured in the event of an earthquake.

Further, the outer diameter of the valve body of the shut-off valve from a small one to a large one corresponding to different outlets from a small one to a large one is unified for a large one.
As a result, the guide shaft, the valve element, the cap, and the valve element holding bracket need only be prepared for a large one and a common one, so that the production can be rationalized by standardization.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a liquid storage device according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a structure of a shutoff valve of the liquid storage device.

FIG. 3 is a plan cross-sectional view of the shut-off valve, showing a cross section taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water storage tank (storage container) 2 Supply port 3 Take-out port 4 Supply pipe 5 Water distribution pipe 6 Pump 8 Flange 10 Shut-off valve 11 Control drive unit 12 Seismic sensor 13 Control part 14 Drive part 16 Connection wire 18 Elbow 19 Valve seat 20 Packing DESCRIPTION OF SYMBOLS 21 Guide shaft 22 Valve 23 Cap 24 Valve holder

Claims (2)

[Claims] 1. A storage container (1) which has a supply port (2) for a liquid storage material and an outlet (3) for storing a liquid storage material, and has an outlet (3) inside the outlet (3). ), A pump (6) for sending out liquid storage via a water pipe (5) is connected to the outside of the outlet (3), and a seismic signal is output when a predetermined earthquake vibration occurs. Seismograph (12)
A control unit (13) for issuing a control signal for controlling the entire apparatus such as a shutoff valve (10) and a pump (6); and a drive unit (1) for driving the shutoff valve (10) based on a signal from the control unit (13).
4), the shut-off valve (10) is normally opened, the outlet (3) is opened, and the pump (6) is operated to take out the liquid storage material. In response to the signal, the control unit (13) controls the drive unit (14) to drive the shut-off valve (10) to close the outlet (3) and simultaneously stop the pump (6). A liquid storage device characterized in that a control drive unit (11) is formed by integrating a shaker (12), a control unit (13), and a drive unit (14) and attached to a lower side surface of a storage container (1). 2. A storage container (1) having a supply port (2) for liquid storage and an outlet (3) for storing liquid storage, and an outlet (3) inside the outlet (3). A) a seismic sensor (12) for providing a seismic signal at the time of a predetermined earthquake vibration, and a control unit (13) for providing a control signal for controlling the entire device such as the shut-off valve (10). The drive unit (1) that drives the shut-off valve (10) based on a signal from the control unit (13)
4), the shut-off valve (1) is provided.
0) is an elbow (18) joined to a flange (8) provided inside the outlet (3), a valve seat (19) formed in an upward opening of the elbow (18), and a valve seat (19). ), A predetermined number of guide shafts (21) which are fixed to the outer peripheral flange portion of the valve seat (19) by being equally divided into concentric circles, and which are provided so as to rise upward, and this guide. A valve body (22) guided up and down along the inscribed circle of the shaft (21), and a cap (2) for fixing the upper end side of three or more guide shafts (21) to the same concentric circle as the lower end side.
3) and a valve body (22) penetrating through the center of the cap (23).
And a valve body holding bracket (24) fixed to the upper part of
The other end is connected to the upper end of the valve body holding bracket (24) by the drive unit (1).
4) The connection wire (16) is connected, and the shut-off valves for (1 / 2D) to (D) corresponding to the outlets (3) whose inner diameters are different from (1 / 2D) to (D), respectively. The outer diameter (Db) of the valve body (22) of (10) is unified for (D), and as a result, the guide shaft (21), the valve body (22), the cap (23) and the valve body holding bracket (24) A shut-off valve for a liquid storage device, wherein the shut-off valve is shared with (D).