JPH09100928A - Emergency shutdown device for liquid storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent liquid such as drinking water, stored in a liquid storage tank, from flowing out due to an earthquake. SOLUTION: When an earthquake sensor is actuated sensing vibration (earthquake) of set acceleration or more to cut off a current to a solenoid 7, the magnetic force of the solenoid 7 vanishes, and the solenoid 7 moves into an off position. A hook member 82 constituting engaging/disengaging mechanism 8 is thereby actuated to release lock to a rod 51, and a valve element 4 is turned by its own weight into a position of closing a takeoff port 2a of a liquid storage tank 2. When the valve element 4 closes the takeoff port 2a, liquid pressure presses the valve element 4 into its closing position, that is, the outflow of liquid can be cut off at the takeoff port 2a part opened into the liquid storage tank 2. As a result, even if a feed pipe 3 or the like additionally provided outside of the liquid storage tank is damaged in any position by the earthquake, liquid stored in the liquid storage tank 2 can be positively secured as long as the liquid storage tank 2 is not damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency shutoff device for a storage tank for preventing liquid such as drinking water stored in the storage tank from flowing out due to an earthquake.

[0002]

2. Description of the Related Art Conventionally, there has been known an emergency shutoff valve for automatically shutting off water flow by closing a flow path provided in the middle of a pipe when the pipe is damaged by an earthquake. For example, as described in JP-A-5-248552,
The occurrence of an earthquake is sensed by an earthquake detecting means, and the sensing signal activates a valve element of an emergency shutoff valve provided in the middle of the pipe to automatically shut off water flow.

[0003]

However, the above-mentioned conventional example is effective when the downstream pipe of the emergency shutoff valve is damaged, but is effective when the upstream pipe of the emergency shutoff valve is damaged. Cannot prevent the outflow of drinking water or the like stored in the water tank. In other words, damage to the pipes is likely to occur at the connection between the pipes and at the connection with the equipment, and if the pipe connecting the emergency shutoff valve and the water tank is damaged at the connection, etc. Drinking water will be washed away from the area.

[0004] The present invention has been made in view of such problems, and a liquid storage tank capable of reliably preventing the outflow of drinking water and the like stored in the liquid storage tank unless the liquid storage tank is damaged. The present invention provides an emergency shut-off device.

[0005]

In order to achieve the above-mentioned object, the present invention provides a liquid storage tank for storing a liquid such as drinking water, an outlet opening at the bottom of the liquid storage tank, and an outlet for the same. A supply pipe that communicates with the outlet, a valve that opens and closes the outlet of the liquid storage tank, a connector that is connected to this valve, an earthquake detector that operates by sensing an earthquake that exceeds a preset acceleration, and this earthquake. The electromagnet is turned off or turned on by a detection signal from the detector, and is composed of an electromagnet linked with the connecting tool directly or through an engagement / disengagement mechanism. Is turned OFF or ON, the connection between the coupler and the electromagnet is released, the valve body closes the outlet, and the hydraulic pressure in the liquid storage tank presses the valve body to the closed position. There is.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of an emergency shutoff device 1 for a liquid storage tank according to the present invention. The emergency shutoff device 1 in this embodiment is used for tap water, intermediate water or firefighting. A liquid storage tank 2 that stores various liquids such as water, an outlet 2a that opens at the bottom of the liquid storage tank 2, a supply pipe 3 that communicates with the outlet 2a, and an outlet 2a of the liquid storage tank 2 are provided. From the seismic detector 6 that opens and closes, the connector 5 that is connected to the valve body 4, specifically the rod 51, the seismic detector 6 that operates by sensing an earthquake that exceeds a preset acceleration, and the seismic detector 6 The electromagnetic solenoid 7, which is a form of an electromagnet, which is turned off by the detection signal of the electromagnetic force, the engagement / disengagement mechanism 8 that links the electromagnetic solenoid 7 and the rod 51, and the electromagnetic solenoid 7 in response to the detection signal from the earthquake detector 6. It is composed of a control panel 9 for controlling the above.

The liquid storage tank 2 is installed in a hospital, a school, a high-rise house, an apartment house, a factory, or the like. In this embodiment, the liquid storage tank 2 is installed in the building via a pump 31 provided in a supply main 32. The case of pumping water to the rooftop or elevated tank is shown. The supply main pipe 32 for supplying the liquid stored in the liquid storage tank 2 to a target place extends through the lower part of the side wall of the liquid storage tank 2 and extends into the liquid storage tank 2. The end of the supply main pipe 32 extending into the tank 2 is cut obliquely when viewed from the side, and the base end opening is used as an outlet 2 a for the liquid stored in the liquid storage tank 2.

A main valve 34 such as a butterfly valve, a globe valve, a gate valve, etc. is arranged in the main supply pipe 32 near the outside of the liquid storage tank 2, and the main valve 34 is normally opened. There is. Further, a communication pipe 35 is connected between the supply main pipe 32 located on the upstream side of the main valve 34 and the liquid storage tank 2, and a normally-closed return valve 36 is connected to the communication pipe 35. It is arranged. Therefore, by opening the return valve 36, the liquid in the liquid storage tank 2 can be guided to the upstream side of the main valve 34 in the supply main pipe 32 via the communication pipe 35. On the upstream side of the main valve 34 in the supply main pipe 32, a normally closed air vent valve 37 is provided.

On the other hand, a valve body 4 for opening and closing the opening of the main supply pipe 32 is rotatably supported by the base end opening portion thereof. A packing 41 for sealing the end opening is provided. Then, one end of a rod 51 which is introduced through the side wall of the liquid storage tank 2 is connected to the arm 42 integrated with the valve body 4. Further, in the valve body 4, when the electromagnetic solenoid 7 is ON, the sliding of the rod 51 is restricted and the supply main pipe 3 is controlled as described later.
The base end opening 2 of the liquid storage tank 2, that is, the opening 2a of the liquid storage tank 2 is opened.

The other end of the rod 51 has a slide member 52 having a guide pin 52a and a locking pin 52b.
Is connected. Further, in order to guide the rod 51 into the inside of the liquid storage tank 2, a bellows 21 is provided integrally with the rod 51 at an opening formed in a side wall of the liquid storage tank 2. Is sealed so that no water leaks out.

Although the earthquake detector 6 is not shown in detail, when a vibration exceeding a preset acceleration is sensed, the sensor falls and activates a micro switch. Vibrane (registered trademark) is known.

Further, the electromagnetic solenoid 7 is normally energized via the control panel 9, and at that time, the movable portion 71 is turned off against the pulling force of the spring 84 of the engagement / disengagement mechanism 8 which will be described later.
When operating at the N position (solid line position in FIG. 2), and when the above-described detection signal of the earthquake detector 6 is output to the control panel 9, the power supply from the control panel 9 is cut off and the engagement / disengagement mechanism 8 is released. The movable portion 71 is moved to the OFF position (chain line position in FIG. 2) by the pulling force of the spring 84.

By the way, the engagement / disengagement mechanism 8 is slidable while preventing the L-shaped hook member 82 pivotally supported by the base 81 and the guide pin 52a of the slide member 52 from coming off. A guide 83 having a slit 83a for guiding, a spring 84 for pulling the hook member 82 to rotate in the clockwise direction in FIG. 2, and a stopper 85 for restricting the rotation range of the hook member 82 by the spring 84. The one end of the hook member 82 is connected to the movable portion 71 of the electromagnetic solenoid 7,
The other end is formed into a hook portion 82a capable of locking the locking pin 52b of the slide member 52.

Accordingly, when the electromagnetic solenoid 7 is de-energized, the movable portion 7 is pulled by the pulling force of the spring 84.
1 instantly moves to the OFF position, and the hook member 82 is moved to the position shown in FIG.
At a clockwise direction. As a result, the hook portion 82a of the hook member 82 is locked by the locking pin 52 of the slide member 52.
leave b. Then, the hook portion 82a of the hook member 82
When is released from the locking pin 52b of the slide member 52,
The valve body 4 is rotated by its own weight so as to close the base end opening of the supply main pipe 32, that is, the outlet 2a.
In addition, the supply main pipe 32 disposed outside the liquid storage tank 2 due to the earthquake
In the event that liquid or outflow occurs due to damage to equipment or equipment, the liquid pressure in the liquid storage tank 2 immediately acts on the valve body 4 that closes the outlet 2a to close the valve body 4. Press firmly to the position to ensure water stop. In this case, the guide pin 52a of the slide member 52 to which the rod 51 is connected is
2 slides to the left along the slit 83a by a distance corresponding to the rotation range of the valve body 4.

The control panel 9 is the earthquake detector 6 described above.
In response to the detection signal from the pump 31, the electromagnetic solenoid 7
While turning off the power to the alarm lamp 91, the alarm lamp 91 is turned on and the alarm buzzer 92 is sounded. Here, 93 is a storage battery for power failure, and prevents the movable part 71 of the electromagnetic solenoid 7 from moving to the OFF position during a power failure without an earthquake. Note that any device that can store electricity can be used.

Next, the operation of the emergency shutoff device 1 will be described. First, the electromagnetic solenoid 7 is normally energized through the control panel 9, the movable portion 71 is in the ON position, and the hook member 82 is attached. It is pulled to rotate counterclockwise in FIG. 2 against the pulling force of the spring 84. In this case, the hook portion 82a of the hook member 82 locks the locking pin 52b of the slide member 52 to restrict the slide of the slide member 52. Therefore, the slide member 5
The arm 42 integrated with the valve body 4 is pulled by the rod 51 connected to the valve 2, and the valve body 4 is pulled up to the position where the outlet 2a of the liquid storage tank 2 is opened. Further, the main valve 34 is normally opened, and when the pump 31 is driven through the control panel 9, the liquid in the liquid storage tank 2 is sent to an elevated water tank or the like. Further, the return valve 36 and the air bleeding valve 37 are closed.

Here, when a vibration (earthquake) of a preset acceleration or more occurs, the earthquake detector 6 operates and outputs a detection signal to the control panel 9. Upon receiving the detection signal from the earthquake detector 6, the control panel 9 cuts off the power supply to the pump 31 and the electromagnetic solenoid 7 and simultaneously turns on the alarm lamp 91 and sounds the alarm buzzer 92. on the other hand,
When the power supply to the electromagnetic solenoid 7 is cut off, the spring 8
The movable portion 71 is instantly moved to the OFF position by the traction force of 4, and the hook member 82 is rotated clockwise in FIG. When the hook member 82 rotates, the hook portion 82a of the hook member 82 locks the locking pin 5 of the slide member 52.
2b, and as a result, the regulation of the slide member 52 is released. At this time, the valve body 4 is rotated in the direction of closing the outlet 2a of the liquid storage tank 2 by its own weight. By the rotation of the valve body 4, the rod 51 connected to the valve body 4 is pulled and the slide member 52 is moved to the slit 83a of the guide 83.
Slide along. Thus, the valve body 4 closes the outlet 2a of the liquid storage tank 2. Further, when the supply main pipe 32 or equipment arranged outside the liquid storage tank 2 is damaged due to an earthquake and liquid flows out, the liquid pressure in the liquid storage tank 2 is immediately changed to the outlet 2a. As a result of acting on the valve element 4 that is closed to strongly press the valve element 4 to the closed position, the outflow of the liquid stored in the liquid storage tank 2 is reliably prevented.

As described above, even if the supply pipe 3 connected to the liquid storage tank 2 is damaged, the liquid stored in the liquid storage tank 2 can be secured as long as the liquid storage tank 2 is not damaged. For example, even if the supply main pipe 32 connecting the upstream side of the main valve 34 and the liquid storage tank 2 is damaged, as described above, the valve body 4 causes the outlet 2a of the liquid storage tank 2 to open. Since it seals through the packing 41, the liquid does not flow out through the damaged portion. However, if the supply main pipe 32 connecting the upstream side of the main valve 34 and the liquid storage tank 2 is damaged, damage is spread to the liquid storage tank 2 and cracks are generated, so that the liquid easily flows out. It is desirable to provide the flexible tube 33 on the downstream side near the main valve 34 so that an accident does not occur.

By the way, when the supply main pipe 32 or equipment is damaged and the fluid pressure in the liquid storage tank 2 strongly presses the valve body 4 to the closed position, the valve body 4 is moved from the closed position. Since it is extremely difficult to separate the liquid, it is not easy to take out the liquid such as drinking water stored in the liquid storage tank 2.

Therefore, when the drinking water or the like stored in the liquid storage tank 2 is to be taken out, after closing the main valve 34, the air bleeding valve 37 is opened and the return valve 36 is opened, and the liquid storage tank 2 is opened. The liquid is introduced to the upstream side of the main valve 34 in the supply main pipe 32 through the communication pipe 35, and the liquid pressure applied to the inside and outside of the valve body 4 is made the same pressure, so that the valve body 4 is rotatable. Thereafter, the air release valve 37 is closed. However, if the return valve 36 is opened and the liquid in the liquid storage tank 2 is led to the supply main pipe 32, the air is compressed and the liquid pressure applied to the inside and outside of the valve body 4 becomes the same pressure. 37 is not always necessary.

Then, the rod 51 is pulled to take out the outlet 2a.
The valve body 4 is rotated in the direction to open the hook member 82, the hook portion 82a of the hook member 82 is locked to the locking pin 52b of the slide member 52 to restrict sliding of the slide member 52, and The locking portion 82b on the end side is locked by the locking tool K, and the valve body 4 is held at the open position of the extraction 2a.

Next, the return valve 36 is closed and the main valve 34 is opened. As a result, the liquid in the storage tank 2 can be supplied through the supply main pipe 32 and the main valve 34. That is, if an arbitrary connection portion of the supply main pipe 32 is detached on the downstream side of the main valve 34, the liquid can be taken out from the connection portion of the supply main pipe 32. Further, the liquid can be taken out from the broken portion of the supply main pipe 32.

Further, as described above, even when the supply main pipe 32 between the upstream side of the main valve 34 and the liquid storage tank 2 is damaged, the return valve 36 is opened to open the communication pipe 35 and the supply main pipe. Liquid can be obtained through 32 breaks. In addition, even when the return valve 36 is not provided, it can be pumped out from the manhole of the liquid storage tank 2. Further, water can also be taken by opening a drain valve D provided at the bottom of the liquid storage tank 2.

Next, a second embodiment of the emergency shutoff device 1 for a liquid storage tank according to the present invention will be described with reference to FIG. In this embodiment, the electromagnetic solenoid 7 is turned on by a detection signal from the earthquake detector 6,
Although the connecting tool 5 connected to the valve body 4 and the engagement / disengagement mechanism 8 for connecting the connecting tool 5 to the electromagnetic solenoid 7 are different,
Others are the same as those of the above-described embodiment. Therefore, description other than these is omitted.

Emergency shutoff device 1 according to the second embodiment
The connecting tool 5 is composed of a wire 53 that is connected to the valve body 4 and extends upward, and a rod 51 whose one end is connected to the wire 53 above the liquid storage tank 2. It penetrates the upper side wall of the liquid tank 2 and is drawn out to the outside. The rod 51 is provided with a locking portion 51a.

The engagement / disengagement mechanism 8 has a locking lever 82c whose base end is rotatably supported by a base 81 and whose front end is a locking portion 82d, and this locking lever 82c which is rotated counterclockwise. It is composed of a connecting member R that is pulled so as to be pivoted to, and the other end of the connecting member R is linked to the movable portion 71 of the electromagnetic solenoid 7.

Normally, the electromagnetic solenoid 7 is OFF, the movable part 71 is located below, and the connecting member R and the locking lever 82c are pushed down, and the locking part 82d of the locking lever 82c is the rod 51. The locking portion 51a is pressed rightward and held, and the valve body 4 is pulled up.

Here, the earthquake detector 6 detects an earthquake,
When the electromagnetic solenoid 7 is energized, the movable portion 71 of the electromagnetic solenoid 7 instantaneously moves to the ON position, pulls up the connecting member R upward, and rotates the locking lever 82c counterclockwise. Then, the locking portion 8 of the locking lever 82c
2d is disengaged from the locking portion 51a of the rod 51. As a result, the valve body 4 is rotated by its own weight so as to close the base end opening of the supply main pipe 32, that is, the outlet 2a. Further, when the supply main pipe 32 or equipment arranged outside the liquid storage tank 2 is damaged due to an earthquake and liquid flows out, the liquid pressure in the liquid storage tank 2 is immediately changed to the outlet 2a. Acts on the valve body 4 that is closed to strongly press the valve body 4 to the closed position to reliably stop the water. In addition, the wire 53 and the rod 51 connected to the valve body 4 are pulled by a distance corresponding to a rotation range in which the valve body 4 rotates by its own weight.

Further, when the drinking water or the like stored in the liquid storage tank 2 is taken out or when the valve body 4 is pulled up and the normal operation is to be resumed, it is provided at an intermediate position between the control panel 9 and the electromagnetic solenoid 7. The switch S is turned off to cut off the energization, and the movable portion 71 of the electromagnetic solenoid 7 is positioned below. Also, pull the rod 51 to the right to lock the lever 82c.
The locking portion 82d of is locked to the locking portion 51a of the rod 51. Thus, the valve body 4 can be rotated to open the outlet 2a. If the switch S is automatically returned and turned on, it is convenient and convenient.

Next, a third embodiment of the emergency shutoff device 1 for a liquid storage tank according to the present invention will be described with reference to FIG. Note that, in the third embodiment and the following embodiments, the same reference numerals are used for the same members as those in the first embodiment.

In the case of the emergency shutoff device 1 in this embodiment, the outlet 2a is opened at the lower part of the side wall of the liquid storage tank 2,
The supply main pipe 3 constituting the supply pipe 3 outside the outlet 2a
The base ends of the two are connected, a receiving seat 22 is attached to the inside of the outlet 2a, and a packing 23 is attached to the receiving seat 22. A valve body 4 is rotatably supported on the upper part thereof. Further, the valve body 4 has
One end of the wire 53 as the connecting tool 5 is connected, and the other end of the wire 53 is drawn out from above the side wall of the liquid storage tank 2 to the outside and then guided downward, and the locking portion 52c is provided at the tip thereof. The slide member 52 having is connected.

On the other hand, in the engagement / disengagement mechanism 8, the hook member 8 is pivotally supported by the base 81 in the substantially central portion and has the hook portion 82a at the tip.
2 and the slide member 52 having the locking portion 52c described above.
And a spring 84 and an electromagnet 7A. Normally, the hook portion 82a of the hook member 82 and the engaging portion 52c of the slide member 52 are engaged with each other. The electromagnet 7A pulls the hook member 82 against the urging force of the urging spring 84 and attracts and holds the hook member 82 at the locking position.

When an earthquake of a preset acceleration or more occurs, an earthquake detector (not shown) is activated, and the detection signal cuts off the power supply to the electromagnet 7A. Electromagnet 7
When the energization of A is cut off, the magnetic force disappears, and as a result, the spring 84 pushes the hook member 82 by the pressing force.
In the above, the hook portion 82a is rotated counterclockwise to be disengaged from the locking portion 52c of the slide member 52. Then, the valve body 4, which is connected to the slide member 52 via the wire 53, has the outlet port 2 of the liquid storage tank 2 due to its own weight.
It is rotated in the direction of closing a and seated on the receiving seat 22 to close the outlet 2a of the liquid storage tank 2. Further, when the supply main pipe 32 or equipment arranged outside the liquid storage tank 2 is damaged due to an earthquake and liquid flows out, the liquid pressure in the liquid storage tank 2 is immediately changed to the outlet 2a. Acting on the valve body 4 closing the
The valve body 4 is strongly pressed so as to come into close contact with the seat 22 to reliably prevent the liquid from flowing out.

On the other hand, when the liquid stored in the liquid storage tank 2 is to be taken out, the main valve 34 is closed and the return valve 36 is opened, so that the supply main pipe 32 passes through the communication pipe 35.
The liquid is led to the upstream side of the main valve 34, and is made to have the same pressure as the liquid pressure in the liquid storage tank 2. Next, the connector 5 (slide member 5
2 or wire 53) to pull out the valve body 4 from the outlet 2
After being rotated to the open position of a and separated from the receiving seat 22, the coupling tool 5 is locked by the locking tool K to hold the valve body 4 at the open position of the outlet 2a. Thereafter, when the return valve 36 is closed and the main valve 34 is opened, the liquid in the liquid storage tank 2 can be taken out through the supply main pipe 32.

However, with the valve body 4 closing the outlet 2a, the main valve 34 and the return valve 36 may be opened to take out the liquid in the liquid storage tank 2 from the supply main pipe 32 through the communication pipe 35. it can.

Furthermore, the emergency shutoff device 1 for the liquid storage tank according to the present invention.
The fourth embodiment will be described with reference to FIG.

In the case of the emergency shutoff device 1 in this embodiment, an opening 2x is formed in the lower portion of the side wall of the liquid storage tank 2, the base end of the supply main pipe 32 is connected to the outside of this opening 2x, and
An L-shaped supply main pipe 32 is connected to the inside of the opening 2x, and one end opening of the supply main pipe 32 is formed at the outlet 2a of the liquid storage tank 2. A valve body 4 provided with a packing 41 is rotatably supported at the outlet 2a. Further, the valve body 4 has a wire 53 as the connecting tool 5.
The wire 53 extends above the liquid storage tank 2 and is pulled out from the ceiling wall of the liquid storage tank 2 to the locking position of the engagement / disengagement mechanism 8 described later. Guide pin 53a is provided at the other end.
Further, the return valve 36 is directly provided on the L-shaped supply main pipe 32 connected to the inside of the above-mentioned opening 2x, and can be opened / closed by the turning operation of the handle 36a provided on the outside of the liquid storage tank 2. It is configured.

Further, the earthquake detector 6 has a weight 61, an accommodating portion 62 for accommodating the weight 61, and a receiving portion 63a for receiving the weight 61 dropped from the accommodating portion 62 at one end, and the opening / closing portion 6
The balance member 63 has 3b at the other end, and the opening / closing portion 63b of the balance member 63 connects and disconnects a contact provided in the middle of wiring to the electromagnet 7A. That is, the opening / closing part 63b of the balance member 63 is in a position where the contacts are normally closed and the electromagnet 7A is activated, while when an earthquake of a preset acceleration or more occurs, the weight 61 receives the balance member 63 from the accommodating part 62. Falls on the portion 63a, and the weight 61
As a result, the opening / closing portion 63b of the balance member 63 opens the contact, and as a result, the power supply to the electromagnet 7A is cut off.

Further, the engagement / disengagement mechanism 8 has a grip portion 86 at its tip.
The holding member 86 is formed in the shape of a and is axially supported by the base 81. The holding member 86 includes a spring 84 that urges the holding portion 86a of the holding member 86 in a direction to open the holding portion 86a. Is provided with an electromagnet 7A that adsorbs and holds the grip portion 86a in the closing direction against the biasing force of the spring 84. That is, when the electromagnet 7A operates,
The gripping member 86 is resisted against the biasing force of the spring 84 described above.
As a result of adsorbing the base end side of the, the grip portion 86a on the front end side is closed and the locking pin 53a is gripped.

Therefore, when the earthquake detector 6 is activated due to the occurrence of an earthquake with a preset acceleration or more, as described above,
As a result of the power supply to the electromagnet 7A being cut off, the gripping portion 86a of the gripping member 86 is opened by the biasing force of the spring 84, and the gripping of the locking pin 53a is released. The valve body 4 connected to the wire 53 having the locking pin 53a rotates by its own weight in the direction of closing the outlet 2a of the liquid storage tank 2. Further, when the supply main pipe 32 or equipment arranged outside the liquid storage tank 2 is damaged due to an earthquake and liquid flows out, the liquid pressure in the liquid storage tank 2 is immediately changed to the outlet 2a. Acting on the valve body 4 closing the
Press firmly to the closed position to ensure water stop. For this reason,
Even if the supply main pipe 32 connected to the outside of the liquid storage tank 2 is damaged, the liquid in the liquid storage tank 2 can be secured as long as the liquid storage tank 2 is not damaged.

On the other hand, when the liquid stored in the liquid storage tank 2 is to be taken out, the main valve 34 is closed, the handle 36a is rotated to open the return valve 36, and the main valve 34 of the main supply pipe 32 is opened. The liquid pressure on the upstream side and the liquid pressure in the liquid storage tank 2 are made equal.
Next, by pulling the wire 53, the valve body 4 is rotated to open the outlet port 2a, and then the locking pin 53a.
Is locked by a locking tool K to hold the valve body 4 at the open position of the outlet 2a. Then, by opening the main valve 34, the liquid in the liquid storage tank 2 can be supplied through the supply main pipe 32.

A handle 36 for opening and closing the return valve 36
The valve a may be operated from below or above the liquid storage tank 2, or may be configured as a return valve by providing a plug on the valve body 4 or the supply main 32 inside the liquid storage tank 2. . Also in this case, the opening and closing of the stopper may be remotely controlled from outside the liquid storage tank 2.

By the way, in these embodiments,
Since the structure is simple and the operation is reliable, the case where the valve body 4 is pivotally supported to open and close the outlet 2a of the liquid storage tank 2 has been described as an example. It does not do. Hereinafter, a fifth embodiment in which the valve body 4 is moved up and down to open and close the outlet 2a of the liquid storage tank 2 will be described with reference to FIG.

In the case of the emergency shutoff device 1 in this embodiment, the supply main pipe 32 of the supply pipe 3 is penetrated through the bottom wall of the liquid storage tank 2.
Is introduced, and the base end opening of the supply main pipe 32 is expanded into a trumpet shape and formed at the outlet 2 a of the liquid storage tank 2. The spherical valve body 4 is located above the base end opening of the supply main pipe 32 and is suspended via a rope 54 as a connecting tool 5. The valve body 4 is configured such that a weight is enclosed therein and is reliably settled. Further, a guide guide 24 formed of punching metal, wire mesh, plate material, or the like is disposed above the base end opening of the supply main pipe 32. As will be described later, when the valve body 4 is lowered, the valve body 4 is lowered. 4 to guide the liquid storage tank 2 which is the base end opening of the supply main 32
The outlet 2a is surely closed. On the other hand, one end of the rope 54 is connected to the valve body 4, and the other end thereof extends upward and is pulled out to the outside through the ceiling wall of the liquid storage tank 2, and then the lever 87 of the engaging / disengaging mechanism 8 is formed. It is connected to one end. The lever 87 is rotatably supported by the base 81 at its central portion, one end of which is connected to the rope 54 described above, and the other end of which is normally energized.
It is adsorbed and held by the electromagnet 7A that is operating N times.

Incidentally, one end of the communication pipe 35 is opened at the bottom of the liquid storage tank 2 and is drawn out, and the other end is again penetrated through the side wall of the liquid storage tank 2 and introduced inside, Supply main 3
2 is connected to the vicinity of the base end opening. A return valve 36 is provided in the communication pipe 35 outside the liquid storage tank 2.

In this embodiment, the electromagnet 7 is usually used.
A is energized to be turned on, and its magnetic force attracts and holds the other end of the lever 87 and pulls one end upward. Therefore, the rope 54 connected to one end of the lever 87 suspends the valve body 4 at the base end opening of the supply main pipe 32, that is, at an upper position where the outlet 2a of the liquid storage tank 2 is opened. .

When an earthquake of a set acceleration or more occurs, the seismic detector (not shown) is activated to cut off the power supply to the electromagnet 7A directly or via the control panel, and as a result, the magnetic force for attracting and holding the lever 87 is obtained. Disappears and the lever 87
The valve body 4 is rotated so that one end thereof is located below due to the tension of the valve body 4 due to its own weight. At the same time, the valve body 4 connected to one end of the lever 87 via the rope 54 descends in the direction of closing the outlet 2a of the liquid storage tank 2 due to its own weight,
The outlet 2a is closed. Further, when the supply main pipe 32 or equipment arranged outside the liquid storage tank 2 is damaged due to an earthquake and liquid flows out, the liquid pressure in the liquid storage tank 2 is immediately changed to the outlet 2a. Acting on the valve body 4 closing the
Press firmly to the closed position to ensure water stop. For this reason,
As long as the liquid storage tank 2 is not damaged, the liquid stored in the liquid storage tank 2 can be secured.

On the other hand, when the liquid stored in the liquid storage tank 2 is to be taken out, the main valve 34 is used as in the case of the above-described embodiment.
By closing the valve and opening the return valve 36, the hydraulic pressure in the main supply pipe 32 on the upstream side of the main valve 34 and the hydraulic pressure in the liquid storage tank 2 can be made equal. Here lever 87
By pulling down the pulling tool P hung from the vicinity of the other end and pulling up the rope 54, the valve body 4 can be raised and the outlet 2a can be opened. Then, the towing tool P
When the fastener T attached to the lower end of the valve is moored to the stopper K, the valve body 4 with the weight enclosed therein is held above the outlet 2a, and the main valve 34 is opened, the supply The liquid in the liquid storage tank 2 can be guided through the main pipe 32.

When the energization of the electromagnet 7A is resumed and normal operation is performed, the electromagnet 7A attracts and holds the other end of the lever 87 to raise the valve body 4 to a fixed position, and the traction tool P moves. A fastener T attached to the lower end of the tractor P by lowering it
Is naturally released from the locking tool K.

Next, as in the case of the above-described fifth embodiment, the sixth embodiment of the emergency shutoff device 1 for the liquid storage tank provided with the valve body 4 which can be raised and lowered.
The embodiment will be described based on FIG. 7.

In the emergency shutoff device 1 of this embodiment, an opening 2x is formed in the lower portion of the side wall of the liquid storage tank 2, the base end of the supply main pipe 32 is connected to the outside of the opening 2x, and the opening 2x is formed. An L-shaped supply main pipe 32 is connected to the inside, and one end opening of the supply main pipe 32 is expanded into a funnel shape and formed at the outlet 2a of the liquid storage tank 2.

A packing 38 is provided at the base end opening of the supply main pipe 32, and the valve element 4 is suspended above the valve 38 via a rope 54 as a connecting tool 5. As will be described later, this valve body 4 descends and sits on the packing 38, and the liquid storage tank 2 which is the base end opening of the supply main pipe 32.
The outlet 2a is surely closed. On the other hand, one end of the rope 54 is connected to the valve body 4, and the other end extends upward and is pulled out to the outside through the upper portion of the side wall of the liquid storage tank 2 and then to the adsorbent 56 via the movable pulleys 55a and 55b.
It is connected to. The adsorbent 56 is directly adsorbed and held on the electromagnet 7A which is normally energized and is ON. Therefore, 1/4 of the weight of the valve body 4 in the liquid
The adsorption of the adsorbent 56 with the tension of
Is suspended. The valve body 4 is the outlet 2a of the liquid storage tank 2.
The adsorbent 56 moves up and down by a distance four times as long as the moving distance from the ascending position (solid line position in FIG. 7) to close the outlet 2a to the descending position (chain line position in FIG. 7).

The number of moving pulleys may be increased or decreased depending on the weight of the valve body 4 and the strength of the magnetic force of the electromagnet 7A. For example, if the electromagnet 7A has a large magnetic force, it can be directly connected to the adsorbent 56 without using a moving pulley.

Therefore, when the earthquake sensor 6 is activated due to an earthquake with a preset acceleration or more, the energization of the electromagnet 7A is cut off, and as a result, the magnetic force disappears and the adsorbent 56 cannot be adsorbed and held. , The valve body 4 descends and the adsorbent 56
Rises. In this way, the valve body 4 is lowered by its own weight to a position where the outlet 2a of the liquid storage tank 2 is closed. Also,
When the supply main pipe 32 or the equipment arranged outside the liquid storage tank 2 is damaged by the earthquake and the liquid flows out, the liquid pressure in the liquid storage tank 2 immediately closes the outlet 2a. It acts on the valve body 4 that is operating, and strongly presses the valve body 4 to the closed position to reliably stop the water. Then, the outflow of the liquid stored in the liquid storage tank 2 thereafter is prevented. Therefore, even if the supply main pipe 32 of the supply pipe 3 connected to the liquid storage tank 2 is damaged, the liquid stored in the liquid storage tank 2 can be secured as long as the liquid storage tank 2 is not damaged.

On the other hand, when the liquid stored in the liquid storage tank 2 is to be taken out, the main valve 34 is closed and the return valve 36 is opened so that the liquid pressure on the upstream side of the main valve 34 in the main supply pipe 32 is adjusted. The liquid pressure in the liquid storage tank 2 is the same. Next, the rope 54 is pulled to raise the valve body 4 to open the outlet 2a, and then the suction body 56 is locked to the locking tool K to hold the valve body 4 at a position above the outlet 2a. . After that, if the main valve 34 is opened, the liquid in the liquid storage tank 2 can be supplied through the supply main pipe 32.

Next, a seventh embodiment of the emergency shutoff device 1 for a liquid storage tank of the present invention will be described with reference to FIG.

Emergency shutoff device 1 in the seventh embodiment
In the case of, the opening 2x is formed in the lower part of the side wall of the liquid storage tank 2, the base end of the supply main 32 is connected to the outside of the opening 2x, and the L-shaped supply main is provided inside the opening 2x. 32 is connected, one end of this L-shaped supply main pipe 32 is opened downward, and this opening serves as an outlet 2 a of the liquid storage tank 2.

In the vicinity of the outlet 2a, the bearing J
And a valve body 4 integrally provided with an arm 42 and a valve 4a is rotatably attached to the bearing J.
There is a bearing portion J between the arm 42 and the valve 4a. A weight W is attached to the tip of the arm 42.

Further, one end of a wire 53 as the connecting tool 5 is connected to the weight W, and the other end of the wire 53 is drawn out from the upper part of the side wall of the liquid storage tank 2 and then guided downward. The slide member 52 having the engaging portion 51a is connected to the tip thereof. A guide pin 52a is attached to the slide member 52, and the guide pin 52a slides in the vertical direction by being guided by a slit 83a of a guide 83 fixed to the base 81.

Further, the engagement / disengagement mechanism 8 has a base member 81 rotatably supported at its base end and a hook member 82 having a hook portion 82a at its distal end, and the hook member 82 is rotated clockwise. The hook member 82 is attracted to and held by the electromagnet 7A.

Normally, the electromagnet 7A is ON, and the hook member 82 is adsorbed and held, and the hook portion 82a of the hook member 82 pulls the locking portion 51a of the slide member 52 downward and the weight W upward. And the valve 4a is pushed downward.

When the power supply to the electromagnet 7A is cut off, the electromagnet 7A loses its magnetic force, resulting in the spring 84.
The hook member 82 is rotated in the clockwise direction in FIG.
It is disengaged from the locking portion 51a. At this time, since the sliding direction of the guide pin 52a attached to the slide member 52 is regulated by the slit 83a of the guide 83 fixed to the base 81, the hook portion 82a of the hook member 82 is engaged with the slide member 52. It easily separates from the stopper 51a.

As a result, the weight W moves downward by its own weight, and the valve 4a of the valve body 4 pivotally supported by the bearing portion J rotates so as to close the outlet 2a opened downward. Also,
When the supply main pipe 32 or the equipment arranged outside the liquid storage tank 2 is damaged by the earthquake and the liquid flows out, the liquid pressure in the liquid storage tank 2 immediately closes the outlet 2a. By acting on the valve 4a, the valve 4a is strongly pressed to the closed position to surely stop the water.

[0065]

As described above, according to the present invention, a liquid storage tank for storing a liquid such as drinking water, an outlet opening at the bottom of the liquid storage tank, and a supply pipe communicating with the outlet. , A valve body that opens and closes the outlet of the liquid storage tank, a connecting tool connected to this valve body, an earthquake detector that operates by sensing an earthquake above a set acceleration, and a detection signal from this earthquake detector In addition to being turned off or on, it consists of an electromagnet that works directly with the connecting tool or through an engagement / disengagement mechanism, and when an earthquake of a preset acceleration or higher is detected, the electromagnet is turned off or on by the detection signal of the seismic detector, Accordingly, the connection between the connector and the electromagnet is released, the valve body closes the outlet, and the hydraulic pressure in the liquid storage tank presses the valve body to the closed position. The liquid outlet flows out at the outlet It is possible to cross the supply pipe and which is attached to the outside of the reservoir by the earthquake, even like are damaged equipment connected to the supply pipe, so long as the liquid storage tank is not damaged,
The liquid stored in the liquid storage tank can be reliably secured.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a first embodiment of an emergency shutoff device for a liquid storage tank according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a schematic view showing a second embodiment of an emergency shutoff device for a liquid storage tank according to the present invention.

FIG. 4 is a schematic view showing a third embodiment of the emergency shutoff device for a liquid storage tank according to the present invention.

FIG. 5 is a schematic view showing a fourth embodiment of the emergency shutoff device for a liquid storage tank according to the present invention.

FIG. 6 is a schematic view showing a fifth embodiment of the emergency shutoff device for a liquid storage tank according to the present invention.

FIG. 7 is a schematic view showing a sixth embodiment of the emergency shutoff device for a liquid storage tank according to the present invention.

FIG. 8 is a schematic view showing a seventh embodiment of the emergency shutoff device for a liquid storage tank according to the present invention.

[Explanation of symbols]

 1 Emergency Shutoff Device 2 Liquid Storage Tank 2a Outlet 3 Supply Pipe 34 Main Valve 36 Return Valve 4 Valve Disc 5 Connector 6 Earthquake Detector 7 Electromagnetic Solenoid 7A Electromagnet 8 Engagement Mechanism

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[Procedure amendment]

[Submission date] November 8, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Wherein the valve body, according to claim 1 or請 characterized in that it is rotatably supported in the outlet of the storage tank
The emergency shutoff device for the liquid storage tank according to claim 2 .

The method according to claim 4 wherein said feed pipe, according to claim 1, characterized in that the main valve near the outside of the storage tank is disposed, claims
2 or the emergency shutoff device for the liquid storage tank according to claim 3 .

5. A method according to claim 1, characterized in that a return valve leading to liquid storage tank downstream of the outlet, according to claim 2, the liquid storage tank of claim 3 or claim 4, wherein Emergency shutoff device.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003]

However, the above-mentioned conventional example is effective when the downstream pipe of the emergency shutoff valve is damaged, but is effective when the upstream pipe of the emergency shutoff valve is damaged. can not be prevented from flowing out, such as drinking water stored in savings tank. In other words, damage to the piping, when likely to occur in the connecting portion between the connecting portion and equipment piping between, the pipe connecting the emergency shut-off valve and savings tank, damaged, etc. at the connecting portion, the Drinking water etc. flows out from the damaged part.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

According to the first aspect of the present invention,
A liquid storage tank for storing liquid such as drinking water, an outlet opening at the bottom of the liquid storage tank, a supply pipe communicating with the outlet, a valve body for opening and closing the liquid storage tank outlet, A connecting tool connected to the valve body, an earthquake detector that operates by detecting an earthquake exceeding a preset acceleration, and an OFF or ON operation by a detection signal from this earthquake sensor, and directly or disengaged from the connecting tool. an electromagnet cooperating through the mechanism consists, upon sensing a more seismic preset acceleration, the electromagnet is activated OFF or ON by the sensing signal of the seismic sensor, have been, coordination with connector and the electromagnet is canceled, The valve body closes the outlet, and the liquid pressure in the liquid storage tank presses the valve body to the closed position. The invention according to claim 2 is a liquid such as drinking water.
And a take-out opening at the bottom of this tank
Port, supply pipe communicating with this outlet, and outlet of the storage tank
A valve body for opening and closing the valve, a connecting tool connected to the valve body,
Engagement mechanism that locks and unlocks the connector of the, and setting acceleration
With an earthquake detector that senses an earthquake of
The above-mentioned connecting tool is the engagement / disengagement mechanism with the valve body always pulled up.
Locked by the earthquake detector above the set acceleration
When an earthquake is detected, the engagement / disengagement mechanism locks the connecting tool.
When released, the valve closes the outlet and the liquid storage tank
The hydraulic pressure inside is designed to push the valve body to the closed position.
It is characterized by that.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0065

[Correction method] Change

[Correction contents]

[0065]

As described above , according to the first aspect of the invention, a liquid storage tank for storing a liquid such as drinking water, an outlet opening at the bottom of the liquid storage tank, and a communication opening to the outlet. The supply pipe, the valve body that opens and closes the outlet of the liquid storage tank, the connection tool connected to this valve body, the seismic detector that operates by sensing an earthquake above the set acceleration, and the seismic detector When it detects an earthquake above a set acceleration , the electromagnet is turned on or off by the detection signal of It is turned off or turned on, so that the connection between the connector and the electromagnet is released, the valve body closes the outlet, and the liquid pressure in the liquid storage tank presses the valve body to the closed position. By this, the outlet that opens in the liquid storage tank It is possible to block the outflow of liquid with the liquid, and even if the supply pipe attached to the outside of the liquid storage tank or the equipment connected to the supply pipe is damaged due to an earthquake, as long as the liquid storage tank is not damaged, The liquid stored in the liquid tank can be reliably secured. Further, according to the second aspect of the present invention,
If this is the case, a liquid storage tank for storing liquid such as drinking water and this liquid storage
An outlet that opens at the bottom of the tank and a supply that communicates with this outlet.
The valve that opens and closes the inlet and outlet of the liquid storage tank, and this valve
The connected coupling and the locking and unlocking of this coupling
It operates by detecting the engagement / disengagement mechanism and an earthquake above the set acceleration.
The seismic detector,
When it is lifted up, it is locked by the engagement / disengagement mechanism, and
When the intellectual device detects an earthquake that exceeds the set acceleration,
The above-mentioned connecting tool is unlocked, and the valve body closes the outlet.
At the same time, the hydraulic pressure in the liquid storage tank pushes the valve element to the closed position.
It is designed so that it can be opened in the liquid storage tank.
It is possible to block the outflow of liquid at the
Supply pipe attached to the outside of the liquid storage tank due to an earthquake
Also, even if the equipment connected to the supply pipe is damaged,
Make sure that the liquid stored in the liquid storage tank is
Can be maintained.

Claims (4)

[Claims] 1. A liquid storage tank for storing a liquid such as drinking water, an outlet opening at a lower portion of the liquid storage tank, a supply pipe communicating with the outlet, and opening / closing the liquid storage tank outlet. A valve body, a connecting tool connected to this valve body, an earthquake detector that operates by sensing an earthquake of a preset acceleration or more, and OFF or ON depending on a detection signal from this earthquake detector.
It consists of an electromagnet that works and links with the connecting tool directly or through an engagement / disengagement mechanism, and when an earthquake of a set acceleration or higher is detected, the electromagnet is turned off or on by the detection signal of the seismic detector.
The liquid storage tank is characterized in that the connection between the connector and the electromagnet is released, the valve body closes the outlet, and the liquid pressure in the liquid storage tank presses the valve body to the closed position. Emergency shutoff device. 2. The emergency shut-off device for a liquid storage tank according to claim 1, wherein the valve element is rotatably supported at an outlet of the liquid storage tank. 3. The emergency shutoff device for a liquid storage tank according to claim 1, wherein a main valve is disposed in the supply pipe near the outside of the liquid storage tank. 4. A return valve for guiding the liquid in the liquid storage tank is provided on the downstream side of the outlet.
Alternatively, the emergency shutoff device for a liquid storage tank according to claim 3.