TWM588188U - Overheating sealing device inside valve plug of gas switching device - Google Patents

Abstract

An overheating sealing device inside a valve plug of a gas switching device, wherein the gas switching device includes: a valve seat and a valve plug controlled by a knob. The valve plug is disposed in the valve seat. The center of the valve plug is provided with a recess with an open bottom, and a side wall of the recess is provided with a perforation. The overheating sealing device includes: an upper cap body, a lower plug body, a compression spring, and a positioning ring. The lower end of the lower plug body is a stop plug block, the upper end of the stop plug block is connected to a convex shaft, and the convex shaft is provided with a first concave hole with an open upper end. A convex shaft is inserted into the upper cap body, and a low-temperature tin material is coated, so that the upper cap body and the lower plug body are adhered and integrated into one body. The compression spring is disposed in the first recessed hole of the convex shaft, and is compressed between the upper cap body and the lower plug body. A second recessed hole is provided at the upper end of the cavity of the valve plug. The upper cap body is plugged into the second recessed hole and is fixedly integrated with the valve plug. The positioning ring is fixed at the entrance of the cavity of the valve plug by screwing. When the low-temperature tin material melts under high temperature, the lower plug body is pushed downward by the restoring force of the compression spring, so that the stopper block closes the central perforation of the positioning ring, and closes the gas delivery channel.

Description

Overheating closing device inside valve plug of gas switching device

The present invention relates to a superheated sealing device inside a valve plug of a gas switching device, which can automatically close a gas transportation path in a high temperature environment of a fire.

Whether it is domestic gas or industrial gas, it is delivered to the user through a pipe. Users only need to turn on the gas switch to ignite and use it, which is very convenient. The gas switchgear sold in the workshop has a straight extension of the input port and the output port, with a rotary valve plug with a horizontal perforation in the middle to close the gas transmission path or make the gas transmission path unblocked.

When the hose connected to one end of the gas switch is broken or detached, a large amount of gas will overflow, which is prone to fire or carbon monoxide poisoning. Therefore, an over-flow sealing device may be provided in the delivery hole of the gas switch, and when the gas flow is abnormally large, the gas delivery hole is blocked in a timely manner. The over-flow sealing device is arranged in the input channel so as to cause a part of "pressure drop phenomenon".

When a fire occurs, the ambient temperature rises, and the aforementioned over-flow sealing device will be damaged and lose its effect, causing gas to leak out, expanding the fire, and causing greater disasters. Therefore, an overheating sealing device can be set in the transmission hole of the gas switch, which can act in a high temperature environment and automatically close the gas flow channel.

Overflow sealing device and overheating sealing device can be set in the conveying tunnel of the gas switch The installation will more or less cause a "pressure drop phenomenon" from the gas input end to the gas output end. Therefore, in some areas where the gas delivery pressure is low, users will have the problem of too low gas output pressure.

With Figure 1. The patent No. I660139 "Gas Switchgear" patent owned by the applicant of this creation includes a valve seat 20 and a valve plug 30 controlled by a knob 10. The valve seat adopts an L-shaped design, so that the gas input port 21 and the output port 22 are vertically connected to each other. The valve plug 30 can block the communication state between the input port 21 and the output port 22. The center of the valve plug 30 is provided with a recess 31 with an open bottom, and a side wall surface of the recess 31 is provided with a perforation 32. By the rotation of the valve plug 30, the perforation 32 can be aligned or staggered from the output channel 22 for gas output or closed gas output path operation. An over-flow sealing device 40 and an overheating sealing device 50 are provided in the delivery hole 11 of the valve seat 10, which will cause a "pressure drop phenomenon" from the gas input end to the gas output end.

This creation is an innovative design based on the structure of the aforementioned invention No. I 660139 "Gas Switchgear" patent, so that the gas switchgear not only maintains the overheating enclosure, but also does not generate gas transmission due to the installation of the overheating enclosure. "Pressure drop phenomenon".

The present invention provides a superheated sealing device inside a valve plug of a gas switching device, which is arranged inside the valve plug and does not block the gas transmission path, so it does not cause the "pressure drop phenomenon" of gas transmission.

The overheating sealing device inside the valve plug of the gas switch device provided by the present invention, wherein the gas switch includes a valve seat provided with a valve plug controlled by a knob. The valve seat adopts an L-shaped design, so that the gas input port and the output port are vertically connected to each other. The valve seat is set There is an input channel, an output channel, and an internal cavity portion, and the internal cavity portion is disposed between the input channel and the output channel to communicate the input channel and the output channel. The lower end of the inner cavity portion is in communication with the input channel, and the side wall surface is in communication with the output channel.

The valve plug can be inserted into the inner cavity portion from the upper end of the valve seat in an anastomotic manner to block the communication state between the input port and the output port. The center of the valve plug is provided with a recess with an open bottom, and a side wall of the recess is provided with a perforation. Through the rotation of the valve plug, the perforation can be aligned or staggered from the output channel for gas output or closed gas output path operation.

The overheating sealing device includes: a circular upper cap body, a lower plug body, a compression spring, and a positioning ring. The lower end of the lower plug body is a stop plug block, the upper end of the stop plug block is connected to a convex shaft, and the convex shaft is provided with a first concave hole with an open upper end. The convex shaft of the lower plug body is inserted into the upper cap body, and the outer wall surface of the convex shaft and the inner wall surface of the upper cap body are coated with low-temperature tin, and the upper cap body and the lower plug body are fixedly integrated into one body. The compression spring is disposed in the first recessed hole of the convex shaft, and is compressed between the upper cap body and the lower plug body. A second recessed hole is provided at the upper end of the cavity of the valve plug. The upper cap body is plugged into the second recessed hole and is fixedly integrated with the valve plug. The positioning ring fixes the entrance of the cavity of the valve plug in a screw connection manner. When the low-temperature tin material between the convex shaft of the lower plug body and the upper cap body melts at high temperatures, the lower plug body is pushed downward by the restoring force of the compression spring to make the stopper block of the lower plug body. The central perforation of the positioning ring is closed.

The outer diameter of the stopper block of the lower plug body is a cone that tapers from top to bottom. The inner diameter of the upper end of the central perforation of the positioning ring corresponds to a tapered surface that tapers from top to bottom.

10‧‧‧ knob

11‧‧‧ Bolt

12‧‧‧ Compression spring

20‧‧‧Valve seat

21‧‧‧Enter the tunnel

22‧‧‧Output hole

23‧‧‧ Internal cavity

24‧‧‧ horizontal channel

30‧‧‧Valve plug

31‧‧‧Dent

32‧‧‧perforation

33‧‧‧ convex shaft

331‧‧‧Kagou

34‧‧‧Second recess

40‧‧‧ Overflow Closed Device

50‧‧‧ Overheating sealing device

60‧‧‧Overheating sealing device

61‧‧‧Upper cap

62‧‧‧ Lower plug

621‧‧‧stop plug

622‧‧‧ convex shaft

623‧‧‧first recess

63‧‧‧Compression spring

64‧‧‧ positioning ring

641‧‧‧ central perforation

Fig. 1 is a sectional view of a conventional gas switchgear.

Figure 2 is a sectional view of an embodiment of the creation

FIG. 3 is an exploded view of the embodiment shown in FIG. 2.

Figure 4 is an exploded view of the superheated enclosure.

Fig. 5 is a state diagram of the closed flow channel of the superheating sealing device.

The overheating sealing device inside the valve plug of the gas switching device disclosed in this creation is that the overheating sealing device is set inside the valve plug and is not in the gas flow channel without causing the "pressure drop phenomenon" in the gas transmission ". The valve plug in this creation must have an L-shaped flow path inside, such as the valve plug in the patent No. I 660139 "Gas Switchgear" patent. Please refer to Figure 2 and Figure 3. The gas switching device includes a valve seat 20 and a valve plug 30 controlled by a knob 10. The internal flow passage of the valve seat 20 adopts an L-shaped design, so that the gas input port 21 and the output port 22 are in a mutually perpendicular communication state.

The aforementioned valve seat 20 is provided with an input port 21, an output port 22, and an inner cavity portion 23. The inner cavity portion 23 is disposed between the input channel 21 and the output channel 22 to communicate the input channel 21 and the output channel 22. The lower end of the inner cavity portion 23 is in communication with the input hole 21, and the upper end is an opening. A side surface of the inner cavity portion 23 communicates with the output channel 22. The input port 21 and the output port 22 are in an L-shaped communication.

A bolt 11 fixed on a knob 10 passes through the slot 331 of the convex shaft 33 at the top of the valve plug 30 and the two horizontal channels 24 at the top of the valve seat 20. The knob 10 can drive the bolt 11 to rotate, so as to control the valve plug 30 to rotate at an angle of 90 °. The compression spring 12 can generate a pressing force on the valve plug 30. The connection between the knob 10 and the valve plug 30 is a known structure and is not a technical feature required by this creation, so it will not be described in more detail.

The valve plug 30 can be inserted into the valve seat 20 through the opening at the upper end of the valve seat 20 in a fit. The internal cavity portion 23 is used to block the communication state between the input channel 21 and the output channel 22. The center of the valve plug 30 is provided with a recess 31 with an open bottom, and a side wall surface of the recess 31 is provided with a perforation 32. The valve plug 30 is rotated so that the perforation 32 is aligned with the output hole 22. Then, the gas can be sent into the output hole 22 through the input port 21, the cavity 31, and the perforation 32, and sent out of the valve seat 20. The valve plug 30 is rotated to make the hole 32 and the output hole 22 staggered. Then the valve plug 30 closes the gas output path. The above features have been described in the aforementioned invention No. I 660139 "Gas Switchgear" patent.

Please refer to Figure 2 ~ Figure 4. The overheating sealing device 60 includes: a circular upper cap body 61, a lower plug body 62, a compression spring 63, and a positioning ring 64. A lower end of the lower plug body 62 is a stop plug block 621, and an upper end of the stop plug block 621 is connected to a convex shaft 622. The convex shaft 622 is provided with a first recessed hole 623 with an open upper end. The convex shaft 622 of the lower plug body 62 is inserted into the upper cap body 61, and the outer wall surface of the convex shaft 622 and the inner wall surface of the upper cap body 61 are coated with low temperature tin, and the upper cap body 61 and the lower plug body 62 is fixed into one body. The compression spring 63 is disposed in the first recessed hole 623 of the convex shaft 622 and is compressed between the upper cap body 61 and the lower plug body 62. A second recessed hole 34 is defined in the upper end of the cavity 31 of the valve plug 30. The upper cap body 61 is inserted into the second recessed hole 34 and is fixedly integrated with the valve plug 30. The positioning ring 64 is provided with external threads. An internal thread is provided at the entrance of the cavity 31 of the valve plug 30. The positioning ring 64 can be fixed at the entrance of the cavity 31 of the valve plug 30 by screwing.

Most of the upper cap body 61 and the lower plug body 62 which are fixedly integrated are hidden in the second recessed hole 34, so they will not block the gas transportation path in the recess 31 of the valve plug 30 at all. Although the positioning ring 64 is fixed at the entrance of the cavity 31, the central hole 641 of the positioning ring 64 has a large hole diameter, allowing gas to flow through without causing a "pressure drop phenomenon" in gas transportation. In addition, leak-proof glue is coated between the positioning ring 64 and the inner wall surface of the cavity 31 to prevent air leakage.

When the low-temperature tin material between the convex shaft 622 of the lower plug body 62 and the upper cap body 61 is melted by heat, the compression spring 63 loses its restraining force. With the restoring force of the compression spring 63, the lower plug body 62 is pushed to move downward, so that the stopper block 621 of the lower plug body 62 closes the central perforation of the positioning ring 64, as shown in FIG. The outer diameter of the stopper block 621 of the lower plug body 62 is a cone that tapers from top to bottom. The inner diameter of the upper end of the central perforation 641 of the positioning ring 64 corresponds to a tapered surface that tapers from top to bottom. When the lower edge of the stopper block 621 of the lower plug body 62 is inserted into the central perforation 641 of the positioning ring 64, it is in an oblique contact type closed state.

The upper cap body 61 is fixed in the second cavity 34 in the cavity 31 of the valve plug 30 by means of high-temperature hot-melt adhesive. The upper cap body 61 can also be fastened in the second recess hole 34 in the recess 31 of the valve plug 30. However, the upper cap body 61 must not be deformed, and the fit margin with the convex shaft 622 is affected. Therefore, in practice, it is better to use hot-melt adhesive.

To sum up, the overheating sealing device 60 provided by this creation is used in a gas switch device with an L-shaped gas transmission path. It is not installed in the gas input hole 21 of the gas switch device. Does not affect the gas transmission path. Therefore, the superheated sealing device 60 will not cause the “pressure drop phenomenon” of gas transmission, and is an ideal innovative design.

The above description uses the preferred embodiments to explain the creation in detail, but not to limit the scope of the creation. Anyone who is familiar with such arts can understand that making appropriate changes and adjustments will still not lose the essence of this creation, nor will it depart from the spirit and scope of this creation.

Claims (3)

An overheating sealing device inside a valve plug of a gas switching device, wherein the gas switching device includes: a valve seat and a valve plug controlled by a knob; the valve seat is provided with an input port, an output port, and An internal cavity portion; the internal cavity portion is disposed between the input channel and the output channel to communicate the input channel and the output channel; the lower end of the internal cavity portion is in communication with the input channel; The output port is in communication; the L-shaped communication is formed between the input port and the output port; the valve plug is arranged in the inner cavity portion to block the communication state between the input port and the output port; the center of the valve plug A recess with an opening at the bottom is provided, and a perforation is provided on the side wall surface of the recess; by the rotation of the valve plug, the perforation can be aligned with the output channel and the gas can be output; It is characterized by that the overheating sealing device includes: a round upper cap body, a lower plug body, a compression spring, and a positioning ring; the lower end of the lower plug body is One stop A plug block, the upper end of the stop plug block is connected with a convex shaft, the convex shaft is provided with a first concave hole with an open upper end; the convex shaft of the lower plug body is inserted into the upper cap body, and the outer wall surface of the convex shaft Low temperature tin is coated on the inner surface of the upper cap body, and the upper cap body and the lower plug body are adhered and integrated into one body; the compression spring is disposed in the first recessed hole of the convex shaft and is compressed in the Between the upper cap body and the lower plug body; the upper end of the cavity of the valve plug is provided with a second concave hole; the upper cap body is plugged into the second concave hole and is fixedly integrated with the valve plug; the positioning The ring is provided with an external thread and can be screwed to the entrance of the recess of the valve plug. When the low temperature tin material between the convex shaft of the lower plug body and the upper cap body melts at high temperature, the compression spring is used. The restoring force of the lower plug body pushes the lower plug body to move downward, so that the stopper block of the lower plug body closes the central perforation of the positioning ring. The overheating sealing device inside the valve plug of the gas switching device according to item 1 of the patent application scope, wherein the upper cap body is fixed to the second recess hole in the cavity of the valve plug by means of high-temperature hot-melt adhesive. Inside. The overheating sealing device inside the valve plug of the gas switching device according to item 2 of the scope of patent application, wherein the outer diameter of the stopper block of the lower plug body is a cone that tapers from top to bottom; the positioning The inner diameter of the upper end of the central perforation of the ring corresponds to a tapered surface that tapers from top to bottom.