JPH0728271U - Gas automatic shutoff valve - Google Patents

Abstract

(57) [Summary] [Purpose] If the seismic intensity is greater than or equal to the set seismic intensity, it is possible to quickly and reliably shut off the supply gas automatically. [Structure] When the weight 15 is dropped on the weight receiving portion 7, the locking of the valve rod 13 by the lever 4 is released, and the collar 12 at the lower end of the valve rod 13 is released.
The valve is closed by pressure engagement between the lower surface, the outer peripheral surface of the lower portion of the valve body 11, the upper surface of the conical valve seat 16 and the lower packings 18, 19. [Effect] As soon as an earthquake with a seismic intensity equal to or higher than the preset level occurs, the valve automatically closes, the gas can be reliably and completely shut off, and the fire accident caused by the earthquake can be appropriately shielded. Even if there is poor sliding between the valve body 11 and the valve seat 16 or deviation of the valve action, the valve closing function of the valve does not deteriorate, and the automatic shutoff of the supply gas can always be performed reliably and reliably. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a gas automatic shutoff valve provided in a gas supply pipe system.

[0002]

[Prior art]

 Conventionally, when using a gas stove, a gas stove, a gas stove, or other gas appliances connected from a gas supply pipe via a cock through a gas hose, a strong earthquake caused a fire, resulting in a catastrophic disaster. Will bring about. And the fire caused by this earthquake far surpasses other disasters caused by the earthquake itself. Moreover, since an earthquake occurs without any notice without notice, it is extremely difficult to shut down the cock and immediately extinguish the fire of the gas appliance when the need arises. Therefore, in addition to each cock provided at the connection part to each of the above-mentioned gas appliances, when an earthquake with a vibration of a set seismic intensity (for example, seismic intensity 5) or more occurs in the gas supply pipeline, the gas supply can be reliably and automatically shut off. It is strongly required that an automatic shutoff valve be provided.

[0003]

[Problems to be solved by the device]

 However, conventionally, this type of gas cock and gas valve are not suitable as appropriate, for example, a gas cock for opening and closing the valve disclosed in Japanese Utility Model Publication No. 48-4412 by the operation of an eccentric cam at the base of the lever. A gas cock is known, in which a weight is attached to the lever of the weight with a chain and the valve is closed by the force of the weight to drop, but further improvement in the function, such as certainty, smoothness, and agility of the gas automatic shutoff function, is known. Is requested. In addition, it is necessary to make the sliding contact between the valve body and the valve seat accurate so that the gaseous fluid does not leak when the valve is closed, but the uncertainty of the sealing of the gaseous fluid due to the deviation of the valve action There was a problem. The present invention provides a gas automatic shut-off valve that can quickly and reliably shut off the supply gas even if the earthquake has any direction of vibration such as horizontal vibration and vertical vibration when the seismic intensity is higher than a preset seismic intensity. The purpose is to

[0004]

[Means for Solving the Problems]

 The gist of the present invention is that a valve is formed at the lower end through a collar that is inserted into a sheath tube on the upper surface of a valve chamber having an outflow and an inlet and is urged downward by a spring action interposed. The rod, the lever with the upper end engaging part of the valve rod locked by the upper end, and the lever were placed on the weight receiving part in the valve box so as to drop on the lower end of the lever due to the vibration of the set seismic intensity. It consists of a weight and a conical valve seat with upper and lower packings provided on the lower surface of the valve chamber that communicates with the inlet directly below the valve body, and the valve rod is locked by the lever when the weight falls. It is a gas automatic shut-off valve in which the valve is closed by pressure engagement between the lower surface of the collar, the outer peripheral surface of the lower part of the valve body and the upper and lower packings. Next, the present invention will be described in detail with reference to the drawings with reference to the following embodiments.

First, 1 is a valve box including an operation chamber 2 and a valve chamber 3. Next, 13 is inserted into a vertical sheath tube 24 on the upper surface of the valve chamber 3 having the flow and inlet / outlet ports 20 and 21, and is attached to the lower end through a collar 12 which is urged downward by the action of a ridge 14. It is a valve rod forming the valve body 11. A lever 4 in which an upper end engaging portion 13a of the valve rod 13 is locked by an upper end portion 4a is pivotally mounted in the operation chamber 2 by a pivot shaft 5. A spring 10 is interposed between the lower end portion 4b of the lever 4 and the bottom surface of the operation chamber 2. Reference numeral 6 denotes a partition wall in the operating room 2, which forms a weight receiving portion 7 in the upper portion and extends downward as a hanging portion 8 and in which the weight descending passage 9 faces the lower end portion 4b of the lever 4 in the lower portion. Is formed. A weight 15 is placed on the weight receiving portion 7 so as to drop on the lower end portion 4b of the lever 4 by the vibration of the set seismic intensity (for example, seismic intensity 5). Further, reference numeral 16 is a conical valve seat provided on the lower surface of the valve chamber 3 communicating with the inflow port 21 just below the valve body 11 and having upper and lower packings 18 and 19 interposed therebetween. Reference numeral 17 is a protruding cylindrical portion that is concentrically projected on the upper surface of the conical valve seat 16, and reference numerals 22 and 23 are O-rings. Then, in the present proposal, the locking of the valve rod 13 by the lever 4 is released by the drop of the weight 15, and the valve is closed by the engagement between the lower surface of the collar 12, the outer peripheral surface of the lower portion of the valve body 11 and the upper and lower packings 18, 19. There is. Therefore, the automatic gas shutoff valve of the present invention having the above configuration is provided at an appropriate position in the middle of the gas supply pipe of propane gas or city gas.

[0006]

[Action]

 Now, in the state of FIG. 1, when an earthquake with a set vibration (for example, seismic intensity 5) occurs, the weight 15 on the weight receiving portion 7 falls on the lower end portion 4b of the lever 4 and the lever 4 moves the valve rod 13 The locking is released, and the valve is closed by engaging the lower surface of the collar 12, the outer peripheral surface of the lower portion of the valve body 11, and the upper and lower packings 18, 19 as shown in FIG.

[0007]

[Effect of device]

 Since the present invention has the above-mentioned configuration, when an earthquake with a seismic intensity higher than the preset value occurs, the valve automatically closes immediately and the gas can be shut off reliably and completely, and the fire accident caused by the earthquake can be properly shielded. . In particular, in this invention, the valve is closed by pressure engagement between the lower surface of the collar 12 at the lower end of the valve rod 13, the outer peripheral surface of the lower portion of the valve body 11, the conical valve seat 16 and the lower packings 18 and 19. The valve closing function of the valve does not deteriorate even if there is poor sliding between the valve body 11 and the valve seat 16 or deviation of the valve action, and automatic shutoff of the supply gas is always stable and reliable. There is an effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of the gas automatic shutoff valve of the present invention when the valve is opened.

FIG. 2 is a vertical sectional front view of the gas automatic shutoff valve of the present invention when the valve is closed.

[Explanation of symbols]

 1 valve box 2 operation chamber 3 valve chamber 4 lever 4a upper end 4b lower end 5 pivot 6 partition wall 7 dead weight receiving part 8 hanging part 9 dead weight flow down passage 10 spring 11 valve body 12 collar 13 valve rod 13a engaging part 14 Spring 15 Weight 16 Conical valve seat 17 Projection tube 18,19 Packing 20 Outlet 21 Outlet 22,23 O-ring 24 Sheath pipe

Claims (1)

[Scope of utility model registration request] A valve rod 13 having a valve body 11 formed at its lower end through a collar 12 which is inserted through a sheath tube 24 on the upper surface of the valve chamber 3 having the outflow and inlet ports 20 and 21 and is urged downward by the action of a spring 14. The upper end engaging portion 13a of the valve rod 13 and the upper end portion 4a.
Directly below the valve body 11 and the weight 4 mounted on the weight receiving portion 7 in the valve box 1 so as to fall on the lower end portion 4b of the lever 4 due to the vibration of the set seismic intensity. Inlet 2
1 is composed of a conical valve seat 16 having upper and lower packings 18 and 19 provided on the lower surface of the valve chamber 3 communicating with 1, and the locking of the valve rod 13 by the lever 4 is released when the weight 15 falls. The gas automatic shutoff valve is configured such that the valve is closed by pressure engagement between the lower surface of the collar 12, the outer peripheral surface of the lower portion of the valve body 11, and the upper and lower packings 18 and 19.