JPS59219585A - All direction seismic-sensitive auto-close gas valve - Google Patents

Abstract

PURPOSE:To interrupt a valve automatically upon occurrence of horizontal or up/down vibration by stopping a click of a ballancer in the groove of a central tube surrounding a rod for suspending a valve body swingably. CONSTITUTION:As a body for sensing seism and vibrates, a rod 7 is passed through the lower face of a hole penetrating in the center between PP of the upper face of a valve body 4 to suspend the valve body swingably. An intermediate disc 3a and a central tube 6 are secured from over the valve body and the rod while an additional heavy body 5 is secured to the outercircumference in the central section and the upper end of the suspension rod 7 is assembled by an adjusting nut 12. A coil spring 10 fittable idly over the innercircumference of a valve box drum 1b is employed as a sensor, to receive the pushing force of the lower face and the gravity of a combination vibrator functioning onto the central tube 6 moving up and down in the central section of valve box by the click upper faces at the opposide sides of balancer 8. Upon occurrence of seism, said balancer 8 will incline to release the click thus to close the valve.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas supply source valve that automatically shuts off the valve not only when a gas combustion appliance remains in ignition combustion mode but also when the seismic intensity exceeds a specified level.

(Note-1) Among the previously announced pulps for the above purpose, those announced as single pulps that operate with the same performance in horizontal motion earthquakes and vertical motion earthquakes are It is not found anywhere other than Patent Application No. 101118 of 1982.

[Combination oscillator structure] (Fig. 1) As a vibrating body that senses earthquakes and vibrates, a hanging persimmon (7 ), hang the valve body in an oscillating state, and then airtightly seal the lower opening of the center hole of the valve body. From above the valve body and the hanging persimmon, the medium disk (8a), the center pipe (6), and the additional weight body (5) are fixed to the outer periphery of the central part thereof, and the upper end of the hanging persimmon is assembled with the adjustment nut Q brocade.

Weight combination = W1 + W2 + Ws = ΣW This combination is a new idea for constructing a combination vibrator that senses earthquakes in all directions. (No. 101118) [Earthquake frequency sensing mechanism] The lower surface of the middle disk (8a) has a downward dish-like shape with a lower opening p'p' whose upper part is circumferential pTJs and whose lower part is 60 degrees wide, and a valve on the pp surface. When the upper surface of the body is lifted, it is lifted to such an extent that a small gap remains. The outer diameter of the lower part of the center tube is 81 parts? 1 (8a) As a guide for the center hole center, enter the hole opening during assembly. There is a tile carved on the outer periphery slightly above the center tube guide part, the top surface of which forms a horizontal surface, and the inward claw (called n claw) of the balancer (Fig. 3) enters the groove, and claw 2 The total weight ΣW of the vibrator is supported on the upper surface of ~8 pieces. The upper surface of the outward claw (k claw) of the balancer receives the downward force of the coil spring through the spring bearing ring Qi. In this way, the two downward forces received on both sides of the nk are $1% (8).At the center, a small diameter steel needle shaft (9
) is applied as a resultant force, and the steel needle shaft also passes through the supports (8b) on both sides of the balancer to support this resultant force.

At this time, when the spring force F1 and ΣW are equivalent and balanced, the upper surfaces of the k and n claws of the balancer are in a horizontal position, and there is a relationship in which the volume-sensitive sliding friction force is low. The center of the spring force f'ik coincides with the tip k of the claw, and the ΣW force is received on average during mn during normal times, and concentrated at point ldm during an earthquake. Therefore, the rotational moment of the balance element) d is balanced by the r radius on both the left and right sides, and the weight of each oscillator is already balanced as a normal static load, so when an earthquake occurs, only the seismic force Kn compresses the spring as an additional compressive force. become. Even in the case of a horizontal or vertical motion earthquake, the seismic force from the earthquake acts as a pull-down blade on the center tube and is applied to the width of the center tube and balancer, resisting the additional spring force moment that pushes the other side of the balancer. The tube goes down. When this hiccup width e becomes zero, the combined vibrator falls down as one, and the valve body valve seat surface adheres to the valve body valve seat surface, closing off the flow of gas.

Due to the above-mentioned characteristic that the coil spring force and the total weight of the vibrator are balanced on a horizontal plane, seismic force can be detected sensitively. Now, if a small earthquake were to occur and the 8 sides were sliding, and this valve did not operate even if the balancer was in place, Kf'i would be so sensitive that it would immediately return to its original balanced position once the earthquake stopped. is guaranteed.

[Operation against horizontal motion earthquake]

(Note-2) Patent application filed by the applicant of the present invention in 1982
Part of the structure described in the claims of Patent No. 068508 (When the valve body shakes sideways due to an earthquake, the distance between the top surface and the center of gravity of the valve is larger than the circumferential radius of the top surface of the valve body. , and due to the lever action of that ratio, the lateral shaking force of the earthquake becomes the tensile force of the suspended wire).
Structure and Original Invention Patent Application No. 101118 filed in 1982 The structure is used in this patent application (May 27, 1988, Omnidirectional Earthquake Sensing Automatic Shutoff Gas Valve, Applicant: Matsuura). This structure is important for implementing the invention and will be described next.

The double edges generated for the weight W1 are as follows: F1 = Center pipe pulling force α in case of horizontal motion earthquake = Earthquake acceleration L = Height from the top surface of the valve body to the center of gravity t = Radial center of the outer circumference of the top surface of the valve body The basis of the present invention is that it works on pipes. In addition, in the case of the original patent application No. 101118 of 1982 and this additional patent application, the energy of the rolling force acting on the other pendulum weights is absorbed by the horizontal wall or guide side face separated by a small gap, and the center tube pulling force Vi Features that should not be used are utilized.

Vertical seismic force is applied to the center pipe and pulls it down.

When the balance element is tilted from the horizontal position against the spring force, and the n claw is tilted to the α angle shown in Fig. 3, the overlap of e becomes zero, the center tube releases the balance element claw, and the combined oscillator is integrated. and fell,
The valve seat surface of (4) closes the valve seat surface of the valve box (2) on the upper surface.

The falling blade F291 at this time is expressed by equation (2), and if we assume that this valve operates at the same seismic intensity for horizontal motion and vertical motion earthquakes, then Fl = F2, so equation (3) is established. do. This relationship (Patent Application No. 1, 1982)
01118) and the structure of this application as a seismic intensity detection method is a connection structure of a coil spring, a balancer, and a central tube, which can fully implement the functions claimed in the claims. It is.

Tun additional relationship The term between nuclear power plants is abbreviated as (original), and the additional invention is abbreviated as (additional).

As a sensor that controls the seismic intensity sensing function in (Original), it is a flange part whose upper and lower surfaces form circular vertebral surfaces, which is formed at the upper part of the dog-shaped central canal by the opening distance of two parallel spring wires. Weight is being held. If an earthquake occurs and the seismic force exceeds the clamping force on the outer periphery of the collar, the valve body will fall and close the valve. In the mechanism 0 (addition), a coil spring loosely engaged with the inner periphery of the valve body cylinder is used as a sensor. The pressing force of the lower surface and the gravity of the combined oscillator acting on the central pipe that moves up and down in the center of the valve box are received by the upper surfaces of both claws of the balance type balancer, and the normal position is balanced horizontally. A mechanism in which the locking pawl is released due to the tilt of the balancer when the valve is hit, and the valve closes.

(Original) The mechanism and principle for sensing horizontal and vertical motion earthquakes using a single gas valve f'i were invented, and (Additional) the seismic force detection accuracy and durability to put that principle into practical use. This invention is an improvement of the detection mechanism that contributes to the improvement of the detection mechanism.

[Brief explanation of drawings]

Fig. 1 Longitudinal cross-sectional view of an automatic shutoff gas valve with earthquake sensing in all directions - Fig. 2 A thousand-and-a-half view of the M-N section Fig. 3 Front and plan views of the balancer 1a... Valve body body 1b ...Valve box body cylinder 1c...
Lid 2 &... Valve box valve seat 2b... Valve seat pusher 8a...
・Chunichi plate 8b...Abutment 4...Valve body 5・
...Additional weight body 6...Center pipe 7...Hanging rod
8...Balancer 9...Steel needle shaft 10...Coil spring 11...Spring presser 12...Adjusting nut 13...
・Spring holder 14...Transparent cap A...Gas inlet B...Gas outlet Patent applicant Matsuura - 8-

Claims (1)

[Claims] As a vibrating body for sensing earthquakes, a valve body (4
) An adjustment nut (2) that suspends the valve body in an oscillating state by a hanging rod (7) that passes through the center between pp on the top surface of ), a central pipe (6) that covers the outer periphery of the hanging rod, and its central part. An automatic valve-closing seismic intensity sensing mechanism used in a combination transducer structure that senses earthquakes in all directions. The horizontal upper surface of the circular ring e groove cut into the outer periphery just above the guide cylindrical part at the lower end of the center tube is aligned with the inward direction Mmn of the balancer (8).
The total weight of the transducer (W1+
W2 + W3 = ΣW). Secoil spring force is applied to the upper surface kt of the outer claw of the balancer through the spring receiver (2),
1b) The balancer is set in the paneka that balances horizontally, that is, with the ΣW force, by means of the spring pusher (b) screwed into the upper part, and maintains its normal position. In the case of a horizontal motion earthquake, the pendulum (4) oscillates laterally, and in the case of a vertical motion earthquake, the downward seismic force acting on the total weight ΣW of the combined pendulum acts on the 0 plane, and the set amplitude is 0. An earthquake-sensing valve closing structure in which the surface of the valve comes off and the entire vibrator falls, blocking both the valve body and the valve seat of the valve body.