JPS6141475Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an earthquake-sensing type gas cutoff device that automatically cuts off the supply of waste in the event of an earthquake or gas leakage accident.

Most of the conventional shutoff devices of this type have a key mechanism built into the gas flow path to detect gas leaks and shut off the gas flow path, making them difficult to assemble and repair. Not only that, but if this were to have an earthquake-resistant structure, the entire device would be enormously bulky, and on top of that, a seismic actuation mechanism would also have to be installed, so at present, earthquake resistance would be sacrificed to some extent. This reduces the difficulty of processing and assembly, and balances costs.

However, in such cases, deterioration of seismic resistance becomes a problem; for example, even if the device operates and temporarily blocks the gas flow path when an earthquake occurs, the main parts of the device may be destroyed by falling objects caused by the earthquake. many,
Even in normal times, new gas leaks occur due to the above-mentioned structural destruction when an earthquake occurs.

On the other hand, a gas cutoff device has only a few parts such as a valve body, a part of the valve operating rod, and a spring built into a base body with a gas flow path and a valve seat, and a valve shutoff operation mechanism is installed outside the base body. In other words, it can be said that the above-mentioned problems can be solved to a large extent with an external type of valve shutoff operation mechanism, but the above-mentioned external type using a solenoid, which has been seen in the past, lacks functional reliability and structural durability. However, there is still room for improvement, and even if a seismic actuator is combined with such a valve cutoff operating mechanism, a desirable gas cutoff device cannot be obtained.

In order to eliminate the above-mentioned conventional drawbacks, the present invention aims to provide an earthquake-resistant device that is not only compact and simple but also has a stable flow blocking function. This will be explained in detail.

1 and 2, a base body 1 has a gas passage 2 formed therein, and gas passages 3a and 3b are opened at both ends of the gas passage 2. As shown in FIGS.

Further, the gas flow path 2 of the base body 1 is provided with a flow chamber 2a and a valve chamber 2b in the middle thereof, and a valve seat 4 is formed at the boundary between the two chambers 2a, 2b.
Moreover, the valve chamber 2b is closed by the lid 5.

On the other hand, the valve body 8 is equipped with a packing 6 on the plate surface for closing the valve, and has a shaft pin 7 erected from the center of the plate surface.
The gasket 6 is placed inside the valve chamber 2b in a state facing the valve seat 4, and is subjected to an elastic force in the valve closing direction by a spring 9 between the valve body 8 and the lid body 5.

Next, the valve operating rod 10 has a protruding end 10a at one end in the longitudinal direction and a pushing end 10b at the other end, and the outer periphery of the protruding end 10a has a stepped engagement ring formed by small-diameter processing. A portion 11a and an engaging portion 11b are formed, and a fitting hole 12 corresponding to the shaft pin 7 is bored from the end surface of the pushing end portion 10b.

This valve operating rod 10 has a protruding end 10a at one end thereof.
is placed outside the base body 1, and the other end, the pushing end 10b, is fitted into the base body 1, but in the case shown, it is fitted into the base body 1 with an O-ring, a grease groove, etc. The rod 10 passes through the cylindrical body 13, and the pushing end 10b is connected to the communication chamber 2a.
In the fitted state between the shaft pin 7 and the fitting hole 12 inside, the valve body 8 faces and abuts.

In the above, a valve shutoff operating mechanism 14 is attached to a predetermined outer surface of the base 1, that is, the outer surface of the base where the protruding end 10a of the valve operating rod 10 is disposed, and the mechanism 14 is shown in FIGS. As shown in the figure, it is constructed as follows using each necessary member.

First, the mounting plate 15 has a flat plate part 15a and a flat plate part 1.
The valve operating rod 10 is provided on the plate surface of the flat plate portion 15a.
An insertion hole 16 is bored therein, a fulcrum 17 is attached to the plate surface, and a receiver 18 is attached to the upright plate portion 15b.

On the other hand, the locking pin 19 is supported via a holder 20, and this holder 20 is a flat plate part 20a.
The flat plate part 20a has an insertion hole 21 for the valve operating rod 10 corresponding to the insertion hole 16 of the mounting plate 15. A fulcrum hole 22 is formed in the upright plate portion 20b, and a horizontally elongated sliding hole 23 is formed in the upright plate portion 20c.

The locking pin 19 is supported by the upright portions 20b and 20c of the holder 20 with one end having the stop ring 24 inserted into the fulcrum hole 22 and the other end inserted into the sliding hole 23. The end portion inside the sliding hole 23 is adapted to slide along the same hole 23.

Furthermore, the vibration-sensing actuating body 24 is composed of a weight part 24a and a shaft rod 24e protruding from the lower end of the weight part 24a through stepped parts 24b, 24c, and 24d, and a disc 25 is concentrically attached to the tip of the shaft rod 24e. It is fixed at.

This vibration-sensing actuator 24 is placed on a mounting table 26, and the mounting table 26 includes a flat plate portion 26a, and vertical plate portions 26b, 26b extending downward from both front and rear ends of the flat plate portion 26a. It consists of mounting pieces 26c, 26c bent outward from the lower ends of the upright plate parts 26b, 26b, and the flat plate part 26a has mounting pieces 26c, 26c bent outward from the lower ends of the vertical plate parts 26b, 26b.
A fitting hole 27 is formed into which the stepped portion 24d is fitted.

The vibration-sensing actuator 24 is fitted into the insertion hole 27 below the stepped portion 24d, and is swung on the mounting table 26 with the lower end surface of the stepped portion 24c in contact with the periphery of the insertion hole 27. It is placed freely.

Furthermore, the solenoid 28 is provided with a push rod 29 that moves in a push and pull motion by energizing and releasing the solenoid.

By the way, the vibration-sensing actuating body 24 and the solenoid 28 are composed of a starting plate 30, an engaging piece 31, and an actuating frame 3.
2. It is linked with the operating lever 33 and the sliding plate 34.

The starting body 30 includes a flat plate part 30a, standing plate parts 30b erected from both front and rear ends of the flat plate part 30a,
30b, and the flat plate portion 30a has an insertion hole 35 for the valve operating rod 10 corresponding to the insertion hole 16 of the mounting plate 15, and a shaft rod 24 of the seismic actuator 24.
An insertion hole 36 having a diameter smaller than that of the disk 25 provided at the tip of the activation plate 30 is inserted, and a display member 37 is fixed to one end of the activation plate 30. It is loosely fitted between the upright plate parts 20b, 20c of the holder 20 so as to overlap with the upright plate parts 20b, 20c, respectively, and passes through the activation plate 30 and the holder 20, and has stop rings 38a, 38a at both ends. It is rotatable about the shaft pin 38 as a fulcrum.

Further, the engagement piece 31 is provided with a mounting portion 39 at one end, and a cam portion 40 at the other end.
The engagement piece 31 is screwed onto one end of the activation plate 30 through its attachment portion 39 .

Next, the operating frame 32 has a cam engaging pin 41 that engages with the cam portion 40 horizontally suspended at the lower end 32a, and a tongue piece 42 is provided at the upper end 32b.

Further, the operating lever 33 has a concave groove 43 at its tip, and the sliding plate 34 has a horizontally elongated sliding hole 44 at one end thereof.

In the above, the insertion hole 21 of the holder 20 that supports the locking pin 19 and pivotally supports the activation plate 30 matches the insertion hole 16 of the mounting plate 15, and the locking pin 19 is attached to the mounting plate 15. The solenoid 28 is mounted on the flat plate part 15a in a state substantially parallel to the vertical plate part 15b, and the solenoid 28 is attached to the vertical plate part 15b near one end of the upper part of the vertical plate part 15b.

Further, the operating lever 33 is rotatably supported at its longitudinal intermediate portion via the fulcrum 17 on the flat plate portion 15a and a shaft pin 45 inserted therein, and the operating frame 32 is supported at its upper end 32b. is placed over the receiver 18 of the upright plate portion 15b and passes through the upper end portion 32b and the receiver 18.
It is rotatable about 6 as a fulcrum.

The push-pull rod 29 of the solenoid 28 and one end of the operating lever 33 are connected via a shaft pin 47, and a groove 43 provided at the other end of the operating lever 33 is formed in the engaging piece 31. The cam portion 40 of the engaging piece 31 and the cam engaging pin 41 of the operating frame 32 are loosely fitted to the cam portion 40 side, and the cam engaging pin 41 of the operating frame 32 is engaged with each other. One end of the sliding plate 34 is rotatably connected, and the other end of the sliding plate 34 is fitted into the sliding end of the locking pin 19 through a sliding hole 44 provided at the same end. A washer 48 and a stop ring 49 are installed at the sliding end.
is attached.

In addition, the tongue piece 42 of the operating frame 32 and the holder 2
The spring A extends across the threaded rod 50 screwed onto the locking pin 19, the spring B extends between the tongue piece 42 of the operating frame 32 and the engaging piece 31, and the spring B connects the locking pin 19.
A spring C is applied across the sliding portion of the holder 20 and the threaded rod 50 of the holder 20, respectively.

Among these springs A, B, and C, spring A is connected to the operating frame 32 to which the sliding plate 34 is connected.
The spring B is for rotating the lower end 32a in the direction R in FIG.
The spring C determines the sensitivity of the activation plate 30, which applies an upward tension to the attachment end and operates via the vibration sensing actuator 24, and the spring C is connected to the locking pin 19 as described above. Engagement part 11 of valve operating rod 10
This is for multiplying by a.

Note that the upper end of the spring B is rotatably locked to a screw 51 screwed onto the tongue piece 42.
By changing the tensile force of the spring B using the screw 51, the sensitivity corresponding to the seismic intensity can be adjusted.

In addition, in the above, the transmission system 5 extending from the vibration sensing actuating body 24 and the solenoid 28 to the locking pin 19
2 is a starting plate 30, an engaging piece 31, and an operating frame 3
2. It is composed of an operating lever 33, a sliding plate 34, etc.

The valve shutoff operating mechanism 14 having the above configuration is mounted on a predetermined outer surface of the base body 1 described above, and at this time, the protruding end 10a of the valve operating rod 10 passes through the insertion hole 16 of the mounting plate 15. , its engagement part 11
a corresponds to the locking pin 19 in a freely engaging and detachable manner.

In the figure, 53 is a stopper attached to the upper end of the upright plate portion 20b of the holder 20 via a screw 54, and the stopper is designed so that its tip 53a abuts both the engaging portion 11a and the engaging portion 11b. It's summery.

Further, 55 has an arm portion 55a bent at one end,
It is a reset lever with a handle 55b extending from the upper part of the same end, and the other end is pivotally supported on one end of the shaft pin 38 with a washer 56, and the lower end of the center is connected to the stopper 53. A spring 57 is applied across the reset lever 55, and when the handle 55b of the reset lever 55 is pressed down, the arm portion 55a of the reset lever 55 pushes one side end of the drive plate 30 downward.

Further, 58 is a vertical device attached to the solenoid 28, and is used to confirm the verticality of the valve shutoff operating mechanism 14 when installing the device of the present invention.

Reference numeral 59 denotes a lid for covering the valve shutoff operation mechanism 14, and this lid 59 is screwed to the base 1. On one side of the lid 59, there is a drive plate as shown in FIG. A see-through section 60 is provided to see through the 30 display members 37 from the outside.

61 is a known gas leak detector, which is connected to the solenoid 28 described above.

When the device of the present invention consists of the above embodiment, the device is incorporated into a piping system that spans a gas supply source such as a gas cylinder and a gas appliance, and the piping connections at this time are as known to the gas vents 3a and 3b. Insert the gas pipe.

When the valve is opened, the valve element 8, which is receiving an elastic force in the valve closing direction via the spring 9, is pushed down by the valve operating rod 10 to separate the valve element 8 from the valve seat 4, and the valve operating rod 10 is pressed down. A locking pin 19 is attached to the locking portion 11a.
to keep the valve open.

When the valve is held in the open state, the vibration sensing actuator 24 is placed in the center of the mounting table 26, the drive plate 30 is held in a substantially horizontal position, and the cam portion 40 and the cam locking pin 41 and the engaging piece 3
The operating frame 32 interlocking with 1 has its lower end 32
A is rotating in the direction R' in FIG. 4 against spring A.

On the other hand, the push rod 29 of the solenoid 28 is
The concave groove 43 side of the actuating lever 33 rotates in the Z direction in the figure, and the actuating lever 33 interlocks with the engaging piece 31 via the concave groove 43.

Therefore, when each part is in this state, the sliding plate 34 into which one end of the locking pin 19 is inserted is also moving in the Y direction in FIG. 4, and the locking pin 19 is removed from the locking part 11. Power is not exerted.

Conversely, since the locking pin 19 is under the tension of the spring C, in the above state, the locking pin 19
will not come off inadvertently from the engaging portion 11a.

Unless an earthquake or a gas leakage accident occurs, the valve will remain open, and the gas flowing through the gas passages 2a, 2b, etc. in the base body 1 will flow through the gas ports 3
The flow will flow from a to 3b (or from 3b to 3a), but if a gas leak occurs due to an earthquake or a gas appliance goes out due to an unexpected cause, the following will occur. The valve is closed and the gas supply is cut off.

First, let me explain what happens when an earthquake occurs.
The seismic actuating body 24 swings on the mounting table 26 due to an earthquake that occurs, and if the earthquake is equal to or higher than the actuation seismic intensity, the disc 25 provided at the lower end of the actuating body 24 swings on the mounting table 26.
By rotating the end of 0 in the direction L in Figure 4,
The cam portion 40 side of the actuating piece 31 attached to the other end of the activation plate 30 rotates in the Z′ direction in the figure, and the cam portion 40
As a result, the lower end 32a of the operating frame 32 receiving the tensile force of the spring A rotates in the direction R in the figure, and the sliding plate 34 also rotates. Move the locking pin 19 in the same direction against the spring C in the same figure.
The locking pin 19 is pulled in the Y′ direction, thereby causing the locking pin 19
from the engaging portion 11a of the valve operating rod 10.

With the locking pin 19 removed, the valve operating rod 10 no longer has the force to hold the valve open, and therefore the valve body 8, which is receiving an elastic force in the valve closing direction via the spring 9, comes into close contact with the valve seat 4. to close it and cut off the gas supply.

Next, to explain the case where a gas leak occurs due to an unexpected cause, when a gas leak occurs,
The gas leak detector 61 immediately detects this and sends a pulse current to the solenoid 28.
8 is excited.

The energized solenoid 28 moves the push rod 29 to the fourth position.
As a result, the concave groove 43 side of the operating lever 33 rotates in the Z' direction in the figure, and the cam portion 4 of the engaging piece 31 fitted into the concave groove 43
0 is pushed down and the engagement between the cam portion 40 and the cam engagement pin 41 is displaced to a shallow state, and as a result, the following operation occurs in the same manner as in the case where an earthquake occurs as described above, and the gas supply is cut off.

In addition, in order to resume gas supply after eliminating the cause of a gas leakage accident, etc., remove the lid body 59 screwed to the base 1, and move the valve operating rod 10 to the spring 9.
The valve body 8 is separated from the valve seat 4 by pressing down against the elastic force of
9 is locked, press down the reset lever 55.

By this operation, the vibration sensing actuating body 24 is moved to the mounting table 26.
The cam part 40 of the engaging piece 31 is engaged with the cam engaging pin 41 of the operating frame 32, and becomes operable again.

Note that the base body 1 and the members assembled inside and outside thereof in the above, except for the gasket 6, are mainly formed by metal molding, metal machining, or the like.

As explained above, in the present invention, inside the base,
A gas flow path and a valve seat are provided, and a valve body for opening and closing the valve seat is housed inside the base with a spring interposed therebetween to apply force in the valve opening direction. The valve operating rod, which can penetrate in the opening and closing direction and move in the same direction, has one end interposed within the base so as to be interlocked with the valve body, and a locking part formed on the outer periphery of the other end that protrudes outside the base. In the gas cutoff device, a valve cutoff operation mechanism is provided on the outer surface of the base body on which the protrusion end of the valve operating rod having the engagement portion is located, corresponding to the protrusion end. The operating mechanism includes a locking pin that intersects with the protruding end of the valve operating rod and is removably engaged with a locking portion of the protruding end, and supports the locking pin at both ends so as to be movable in the locking and unlatching direction. a power solenoid for disengaging the locking pin from the locking portion; a gas leak detector connected to the solenoid; a transmission system between the locking pin and the solenoid; It is characterized by comprising a vibration sensing actuating body assembled to the transmission system.

Therefore, in the case of the device of the present invention, not only is the valve cutoff operating mechanism of an external type that satisfies the simplicity and earthquake resistance of the internal structure of the base body, but also that the locking pin intersects with the protruding end of the valve operating rod. The locking pin and the locking portion are engaged and detachable from each other, and since the direction of movement of the locking pin and the direction of movement of the valve operating rod are different from each other, the locking pin and the locking portion are relatively locked. , the locking pin does not come off inadvertently and the valve operating rod does not move inadvertently in the so-called latch-like condition. Since only a very small locking force is required, no fatal problem such as deformation of the valve operating rod occurs.

Furthermore, since the solenoid indirectly operates the locking pin via the transmission system, damage to the solenoid that tends to occur when the solenoid directly drives the locking pin can be avoided.

Therefore, when using the device of the present invention, whether the gas is shut off by a gas leak detector or a seismic actuator, it functions with reliability and stability, and does not impair its durability.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing one embodiment of the gas cutoff device according to the present invention, Fig. 2 is a sectional view taken along the line - Fig. 1, and Figs. 3 and 5 are the valve cutoff operation mechanism in the same. A plan view and an exploded perspective view, and FIG. 4 is a partial perspective view showing the operation of the same. DESCRIPTION OF SYMBOLS 1... Base body, 2... Gas flow path, 2a... Communication chamber, 2b... Valve chamber, 3a, 3b... Gas vent, 4
... Valve seat, 8 ... Valve body, 9 ... Spring, 10
...Valve operating rod, 10a...Protruding end, 10b...
Pushing end portion, 11a...Locking portion, 14...Valve shutoff operation mechanism, 19...Lock pin, 20...Holder, 2
4... Earthquake sensing actuator, 28... Solenoid, 52...
...Transmission system, 61...Gas leak detector.

Claims (1)

[Scope of utility model registration request] a gas shutoff device comprising: a gas flow path and a valve seat provided within a base; a valve body for opening and closing the valve seat disposed within the base via a spring for applying a force in a valve opening direction; a valve operating rod which penetrates the base in the valve opening and closing direction and is movable in the same direction, one end of which is inserted into the base and corresponds to the valve body so as to be interlocked with the valve body; and a locking portion is formed on the outer periphery of the other end which protrudes outside the base; and a valve shutoff operation mechanism is provided on the outer surface of the base where the protruding end of the valve operating rod having the locking portion is located, the valve shutoff operation mechanism comprising: a locking pin which intersects with the protruding end of the valve operating rod and corresponds to the locking portion of the protruding end so as to be able to be engaged and disengaged with, a holder which supports both ends of the locking pin so as to be able to move in the engagement and disengagement direction; a power solenoid for disengaging the locking pin from the locking portion; a gas leak detector connected to the solenoid; a transmission system between the locking pin and the solenoid; and a seismic actuator attached to the transmission system.