JPS585200Y2 - Gas cylinder pressure rise sensitive device - Google Patents

Description

[Detailed description of the invention] This invention relates to a pressure rise sensing device for a gas cylinder attached to a so-called cartridge-type gas stove that incorporates a small liquefied gas cylinder, and prevents the gas cylinder from becoming abnormally high pressure and exploding while the gas stove is in use. Our goal is to provide safe gas stoves.

Conventionally, gas cylinders attached to cartridge-type gas stoves are overheated by radiant heat from the combustion flame of the burner, so
There was an abnormal increase in the Uchitoshi Gas Sho, and there was even a fear that it would explode or explode.

As a safety measure, a pressure sensitive device was devised that immediately senses abnormally high pressure as shown in Figure 5. This has prevented an abnormal rise in pressure O.

In the figure, 2' is a gas flow passage, 4' is a piston, and 5' is an O
ring, 10' is a push rod, 12' is a coil spring, t3'
indicates camp.

However, in all of these conventional pressure sensitive devices, the piston 4' slides slowly, and the coil spring 1
Since the piston 4' requires a direct balance, the effective acting force of the piston 4' is reduced by that amount and becomes small, resulting in a disadvantage that it is difficult for the whole to function reliably.

In order to improve the above-mentioned drawbacks of the conventional device, the present invention is a pressure increase sensitive device for gas cylinders that operates in two stages using two coil springs, one inside and one inside. This has the advantage of being extremely reliable and smooth.

An example of the present invention will be explained with reference to the drawings. Figure 1 is a zero analysis view when the gas cylinder is at normal pressure and the device of the present invention is not operating, and Figure 2 is a zero analysis view when the gas pressure has risen above a predetermined value and the device of the present invention is not operating. FIG. 3 is a cross-sectional view when the sliding back portion first operates, and FIG. 3 is a cross-sectional view when the piston portion further operates.

Throughout each figure, 1 is a cylinder part that connects to the left side (bottom side) of the gas flow path 2 from the gas cylinder through a small hole 3 that spreads in a conical shape. inner circumference 1”
The thread groove 1a is cut.

4 is a cylindrical piston fitted into the cylindrical portion 1, and has a shoulder portion 4a on the outer periphery, the left side (inner side) of the central hole 4b has a small diameter 4b', and the right side of the inward hole 4b ( Thread grooves are cut on the inner circumference and outer circumference 4C of the end (opening side).

A sliding tool 6 having a conical left tip 6a and a flange 6b in the middle is inserted into the piston center hole 4b, and the diameter of the flange 6b is equal to the diameter of the middle hole 4b on the left side. Part 4b
The left tip end conical part 6a passes through the small diameter part 4b' and can be tightly fitted into the conical JfL 3.

A pressure adjusting screw 9 having a hole in the center is screwed into a threaded groove on the inner circumference of the right side (opening side) of the central hole 4b, and the right side of the sliding tool 6 projects through the central hole of the screw 9.

A coil spring 8 is wound around the part of the sliding tool 6 between the collar 6b of the sliding tool 6 and the pressure adjusting screw 9, and the sliding tool 6 is thereby pushed to the left and the left conical part 6a is tightly fitted into the conical shape or small hole 3.

The 01J ring 7 is fitted onto the circumference of the slope of the conical part 6a of the sliding ring, and the conical part 6a and 1J4L3 are brought into close contact with each other. A camp-shaped push rod 10 is screwed into the outer circumferential thread 4C of the right end of the hole 4b, and when the front sliding shaft 6 slides to the right into the left thread recess 5, its right end so that it can be hit and stopped.

Also, insert the gasket 11 into the circumference of the left recess of the push rod 10, and insert the screw into the right end (opening end) of the center hole 4b of the tongue 4.
It is airtight between the surface and the surface.

Furthermore, a hole is made in the center of the top (right side) of the screw 1a on the inner circumference of the right end (open end) of the cylindrical portion 1. Camp 13 is screwed together, its left recess 5. A coil spring 12 is wound between the shoulder portion 4a of the piston 4 and the piston 4, so that the entire piston 4 and push rod 10 are positioned on the left side (
(back side).

The center hole at the top of the camp 13 has a size that allows the right end of the push rod 10 to pass through.

An O-ring 59.5 is attached to the circumferential portion of the piston 40 to bring the piston 4 and the cylindrical portion 1 into close contact.

The right end of the push rod 10 is connected to a known automatic gas supply stop device (not shown) connected to a gas cylinder.

To explain the operation of the pressure rise sensitive device of the present invention configured as above, when the pressure of the gas cylinder is normal, the sliding tool 6 is pushed to the left by the elasticity of the coil spring 80, and so on.
The conical end portion 6a:6:'' is closely fitted with J4L3, so that gas does not leak into the cylindrical portion 1 (state shown in FIG. 1).

Next, when the gas pressure rises above a certain value, the sliding tool 6
is pressed to the right against the spring 8, and as a result, the conical portion 6a of the same rod 6 and /''fL3 are separated, and the gas flows into the cylindrical portion 1.
This gas enters the left side (rear side) of the OIJ ring 5, which is fitted into the piston 4 (as shown in Fig. 2).
5 prevents leakage to the right side of the cylindrical portion 1, so the entire piston 4N is pushed to the right side against the elasticity of the coil spring 120 (the state shown in FIG. 3).

As a result, the right end of the push rod 10 protrudes from the center hole of the camp part 13, and the gas cylinder is opened. This led to the activation of the automatic gas supply stop device.

FIG. 4 shows another example of the device of the present invention. In this case, a gap 10a is further formed in the concave portion of the push rod 10 on the remaining side, and a rubber gasket 11' is connected to the right end of the sliding tool 6. Push rod 1
A small hole 10b is formed through the air vent hole 10b, which allows the movement of the upper movement stem 6, the movement due to the compression of the coil spring 8, and the movement due to the expansion of the rubber gasket 11'. is added, so 1・above, J, %3. , the gas passages are closed, and the time in the state shown in Figure 2 is shortened.

In the above water rate device, the pressure value of the gas cylinder at which it should operate can be determined by appropriately screwing in the pressure adjustment screw 9 and the cap 10. Thus, the contraction of the coil springs 8 and 12 can be adjusted and adjusted.

As described above, the pressure rise sensing device of the present invention includes the coil spring 8 and the coil wire.

, 12-9, by using the elasticity of the inner and outer parts and the spring, the rise in gas pressure is detected in two stages ＼ Then the Bon 6! f child, create an automatic supply stop device and make it work tx, %, Q%
? As a result, the operation is reliably smooth and the structure is relatively simple, which is an industrial advantage.

[Brief explanation of drawings]

1 to 3 are cross-sectional views of an example of the device of the present invention, including a chair and a chair, and FIG. Figure 2 shows that when the gas pressure rises above a predetermined value and the moving stem 46 of this device slides to the right, the third. The figures are the same, and moreover, each state 4 is shown when the bistoy 4 is rubbed on the right side. Fig. 4 is a cross-sectional view of another example of the proposed device, and Fig. 5 is a cross-sectional view of the conventional device. It is. Through each figure, 1 is the cylindrical part, 2 and 2' are the gas flow passages, and 3
は/''IL, 4, 4' are pistons, 5゜5' is O
IJ ring, 6 is the sliding stem, I is the O-ring, 8 is the coil spring, 9 is the pressure adjustment screw, 10.10' is the push rod, 11 is the packing, 12.12' is the coil spring, 13' is the camp part. Each is shown below. 13°

Claims (1)

[Scope of utility model registration request] A cylindrical part 1 is installed which communicates with the gas flow passage 2 from the gas pump through a conically widened small hole 3, and inside this cylindrical part 1, a shoulder part 4a is provided at the outer circumferential part'. The piston 4 is loosely engaged, and the inner end of the center hole 4b of the piston 4 is formed into a small diameter 4b'.
A sliding stem 6 having a conical tip 6a and a flange 6b in the middle is inserted into the center hole 4b□, and the diameter of this rib 6b is equal to the small diameter on the back side of the center hole 4b. The conical end portion 6a is thicker than the small diameter portion 4b.
A pressure adjusting screw 9 having a hole in the center is screwed onto the inner circumference of the opening side of the central hole 4b, Attach the other end of the sliding head 6 to the above screw 9.
At the same time, the collar portion 6b and the screw 9
A coil spring 8 is wound around the sliding stem 6 between the piston 4, a camp-shaped push rod 10□ is screwed onto the open end 4c of the piston 4, and a cap is attached to the open end 1a of the cylindrical portion 1. 13 are screwed together, the coil spring 12 is wound between the inner recess and the shoulder 4a of the piston 4, and the end of the push L rod 10 can pass through the center hole at the top of the Wtt camp 13. In comparison, O-rings T and 5 are attached to the slanted circumferential part of the conical part 6a of the sliding stem 6 and the circumferential part of the two-stone 40, respectively, and the end of the push rod 10 is connected to the automatic gas supply stop device of the cylinder. A pressure increase sensing device for gas cylinders that communicates with you.