JPS622373Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquefied petroleum gas release preventer used in piping for propane gas, etc.

Recently, if an earthquake occurs while propane gas is being used in a home or public building, people may forget to close the main gas valve, causing a fire, or the cylinder may topple over due to the earthquake, cutting the gas pipe or falling off from the main valve. Because of this, various types of liquefied petroleum gas emitters have been developed, and the standard operating standards for these gas emitters are tension type and overflow type. It has been decided.

This overflow type gas release device has a structure that automatically closes the valve when excessive gas flows through the gas flow path inside the valve body due to damage to the secondary piping, and therefore limits the amount of gas used. Furthermore, if the cracks or the like that occur in the secondary piping are small and there is little change in the flow rate in the gas flow path within the valve body, the valve may not operate correctly. In addition, the tension type gas release device was developed in 1983.
- As in No. 141263, the inner end of the stopper that passes through the valve body so as to move forward and backward is engaged with the notch of the valve stem to maintain the valve open state, and the stopper is used as a connecting member connecting the outer end of the stopper and the building. When tension is applied and the stopper retreats and its inner end separates from the notch, the valve stem is actuated by spring force and closes the valve, but in this case there is no limit to the amount of gas used. , and because it operates instantaneously due to vibration, it is highly reliable for its purpose. However, there was a problem with the structure, which was high cost.

In view of these problems, the present invention aims to provide a tension-type gas release preventer that operates reliably at a low cost. , the lower end of the bearing hole is opened to the gas flow path, the upper end of the bearing hole is opened, and the valve body is pressed by a spring to a valve seat formed between the inlet of the gas flow path and the opening of the bearing hole. The tip of the valve stem protruding from the bearing hole faces the lower end opening of the bearing hole, and an operating shaft for moving the valve stem forward and backward is fitted into the bearing hole airtightly and movably up and down, and is biased downward by a spring. The tip of the valve stem is pressed by the outer side of the lower end, and the upper end of the actuating shaft protruding from the upper end of the valve body is engaged with a holding part of a stopper with a connecting member connected to one end, and a stopper formed at the lower part of this holding part is engaged. This is a liquefied petroleum gas release preventer in which a pair of left and right elastic curved portions are rotatably fitted into a ring groove provided on the outside of the upper end of the valve body. Specifically, 1 is a gas flow path formed in the valve body 2 and has an inlet 3 on one side of the valve body 2 and an outlet 4 on the other side, and 5 is a gas flow path formed in the valve body 2. This is a bearing hole that is bored downward from the upper end protrusion 2' and has its lower end opened in the center of the gas flow path 1. Reference numeral 6 denotes a valve body which is pressed against a valve seat 7 formed between the inlet 3 of the gas flow path 1 and the bearing hole 5 from the inlet side by a spring 8 . Reference numeral 9 denotes a valve stem that protrudes from the valve body 6, and is slidably fitted into the gas flow path 1 between the valve seat 7 and the bearing hole 5, and has a gas flow groove 9' on the outer periphery over the entire length. The tip end faces the lower end opening 5' of the bearing hole 5. Reference numeral 10 denotes an operating shaft that is inserted into the bearing hole 5 so as to be able to rise and fall freely.A spring 11 is attached to the outside of the operating shaft 10 to bias the operating shaft 10 downward, and a gap between the shaft and the bearing hole 5 is increased. An O-ring 12 is provided for sealing. Further, the lower end of the operating shaft 10 is formed with a tapered portion 10' which presses the tip of the valve rod 9 to close the valve when the operating shaft 10 is lowered. A is a stopper fixed to one end of the connecting member 13 such as a chain or wire, or a holding part 14 and a pair of left and right elastic curved parts 15 are formed by bending a single steel wire or stainless steel wire. . Openings 16 are formed at both ends of the pair of left and right elastic curved portions 15, 15 by bent ends 15', 15'. 17 is the valve body 2
A ring groove 18 provided around the outside of the upper end is a tapered portion formed above the ring groove 17.

One embodiment of the present invention has the above-mentioned configuration, so the inlet 3 opened on one side of the valve body 2 is connected to the main stopper of the high-pressure cylinder, and the outlet 4 opened on the other side is connected to the pressure regulator. , the pair of left and right elastic curved parts 15, 15 of the stopper A are rotatably fitted into the ring groove 17 of the valve body 2, the operating shaft 10 is pushed down by the holding part 14 to open the valve, and connected to the stopper A. The end of the connecting member 13 is connected to a building or a seismic device, and in this state, if the cylinder or the building vibrates due to an earthquake or the like, or the seismic device is activated and tension is applied to the connecting member 13, the stopper Both the left and right elastic curved portions 15, 15 of A open on both sides, the openings 16 at both ends open, and the stopper A separates from the valve body 2.
The operating shaft 10 is raised by the spring 11, and the valve body 6 is moved forward by the restoring force of the spring 8 and is brought into pressure contact with the valve seat 7, thereby stopping the gas from flowing toward the pressure regulator. In this case, since the upper end of the operating shaft 10 protrudes from the valve body 2, it is confirmed that the gas flow is stopped. In addition, in this valve closed state, if both the left and right elastic curved parts 15, 15 of the stopper A are fitted into the tapered part 18 formed on the upper end protrusion part of the operating shaft 10, and the presser part 14 is pressed with a finger, The operating shaft 10 is pushed down against the spring 11, causing the valve rod 9 to retreat against the spring 8, and the valve body 6 is separated from the valve seat 7 to open the valve. On the other hand, the elastic curved portions 15, 15 open outward due to pressure from above and fit into the ring groove 17, and the springs 8 and 11 cause the actuation shaft 1 to
This prevents the upward movement of the valve 0 and maintains the valve open state.

As described above, in the liquefied petroleum gas release preventer according to the present invention, when tension is applied to the connecting member due to an earthquake or the like, the stopper comes off from the valve body, the operating shaft rises and separates from the valve stem, and the valve body is moved away from the valve stem. The stopper comes into pressure contact with the seat to immediately shut off the gas flow path and prevent gas leakage.In particular, the stopper has a holding part and both left and right elastic curved parts, which are overlapped with the upper end protrusion of the operating shaft. The valve is extremely easy to operate because it can be reset from the closed state to the open state with a single action of pressing down.In addition, both left and right elastic curved parts are rotatably fitted into ring grooves in the valve body. Therefore, when a building or gas cylinder vibrates or falls in a direction other than the direction of the connecting member that connects the stopper and the building, etc., the stopper rotates freely depending on the direction of vibration and the direction of the overturning, so the connecting member The tension allows the stopper to be reliably separated from the valve body. Moreover, by using this stopper, the structure of the valve body and the operating shaft can be simplified, and therefore the product cost can be greatly reduced.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention in the valve open state, Fig. 2 is a longitudinal cross-sectional view showing the valve closed state of the same embodiment, and Fig. 3 is a stopper in the above embodiment. A perspective view of. 1; Gas flow path, 2; Valve body, 3; Inflow port, 4;
Outlet, 5; Bearing hole, 6; Valve body, 7; Valve seat, 8;
Spring, 9; Valve rod, 10; Operating shaft, 11; Spring, 12; O-ring, 13; Connection member, 1
4: Holding portion, A: Stopper, 15: Elastic curved portion, 16: Opening portion, 17: Ring groove, 18: Tapered portion.

Claims (1)

[Scope of utility model registration request] The inlet and outlet of the gas flow path are opened on the outside of the valve body, and the upper end of the bearing hole whose lower end is opened to the gas flow path is opened, and the inlet and the opening of the bearing hole of the gas flow path are opened. The valve body is pressed into contact with the valve seat formed in between by a spring, and the tip of the valve stem protruding from the valve body faces the lower end opening of the bearing hole, and an operating shaft for advancing and retracting the valve stem is provided in the bearing hole. It is fitted airtightly and movably up and down, and is urged downward by a spring to press the tip of the valve stem from the outside of its lower end, and a stopper with a connecting member connected to one end is attached to the upper end of the operating shaft that protrudes from the valve body. A liquefied petroleum oil obtained by engaging a holding part and rotatably fitting a pair of left and right elastic curved parts of a stopper formed on the lower side of the holding part into a ring groove provided around the outside of the upper end of the valve body. Gas release preventer.