CN210830556U

CN210830556U - Device for closing the overheating inside the valve plug of a gas switching device

Info

Publication number: CN210830556U
Application number: CN201921075662.XU
Authority: CN
Inventors: 陈石明
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-06-23
Anticipated expiration: 2029-07-10

Abstract

The utility model provides an inside overheated closing device of gas switching device's valve plug, this overheated closing device include the cap body, the cock body, a resistance to compression spring and a retaining ring on one. The lower end of the lower plug body is provided with a stop plug block, the upper end of the stop plug block is connected with a convex shaft, and the convex shaft is provided with a first concave hole of which the upper end is open. The convex shaft is inserted into the upper cap body and coated with low-temperature tin material, and the upper cap body and the lower plug body are adhered and connected into a whole. The compression-resistant spring is arranged in the first concave hole of the convex shaft and is compressed between the upper cap body and the lower plug body. The upper end of the recess 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 connected with the valve plug into a whole. The retaining ring is threadably secured to the valve plug at the entrance of the recess. When the low-temperature tin material is melted at high temperature, the lower plug body is pushed to move downwards by virtue of the restoring force of the pressure-resistant spring, so that the flow-stopping plug block seals the central through hole of the positioning ring, and a fuel gas conveying flow channel is sealed.

Description

Device for closing the overheating inside the valve plug of a gas switching device

Technical Field

The utility model relates to an inside overheated closing device of gas switching device's valve plug, it can be in the high temperature environment of conflagration, and route is carried to self-sealing gas.

Background

Both domestic gas and industrial gas are delivered to the user end by the delivery pipe. The user only needs to open the gas switch, can ignite and use, and is very convenient. The input channel and the output channel of the gas switch device sold in the workshop are in a linear extending state, and a rotary valve plug with a transverse through hole is used for sealing a gas conveying path or enabling the gas conveying path to be smooth.

When the hose connected to one end of the gas switch breaks or falls off, a large amount of gas overflows, so that fire disasters or carbon monoxide poisoning are easily caused. Therefore, the over-flow sealing device can be arranged in the delivery duct of the gas switch, and the gas delivery duct is timely blocked when the gas flow is abnormal and large. The overflow shutoff is disposed within the inlet port to cause a portion of the "" pressure drop "" phenomenon.

When a fire disaster occurs, the environmental temperature rises, and the over-flow sealing device can be damaged and lose the function, so that fuel gas leaks, the fire behavior is expanded, and a larger disaster is caused. Therefore, an overheating closing device can be arranged in the conveying pore channel of the gas switch, and the overheating closing device can act in a high-temperature environment to automatically close the gas flow channel.

The gas switch has a delivery channel in which an over-flow sealing device and an over-heat sealing device can be arranged, which can cause a pressure drop from the gas input end to the gas output end. Therefore, in some areas where the gas delivery pressure is low, the problem of the gas output pressure being too low arises for the user.

With reference to fig. 1. The utility model discloses a utility model 201821484216.X "gas switching device" patent that applicant owned, it contains and is provided with a disk seat 20, a valve plug 30 by knob 10 control. The valve seat adopts an L-shaped design, so that an input pore passage 21 and an output pore passage 22 of fuel gas are mutually and vertically connected. The valve plug 30 can block the communication state between the input port 21 and the output port 22. The valve plug 30 has a cavity 31 with an open bottom at the center, and a through hole 32 is formed on the side wall of the cavity 31. By means of the rotation of the valve plug 30, the through hole 32 can be aligned with or staggered with the output channel 22, so as to perform the operation of gas output or closing the gas output path. The over-flow sealing device 40 and the over-heat sealing device 50 are disposed in the delivery hole 11 of the valve seat 10, which causes a "pressure drop" from the gas input end to the gas output end.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a to the innovative design under the structure basis of aforementioned utility model No. 201821484216.X "gas switching device" patent, make gas switching device existing to keep overheated closing device, can not produce the "pressure drop phenomenon" that the gas was carried because of overheated closing device's setting yet.

The utility model provides an overheated closing device of gas switching device's inside of valve plug, it sets up in the inside of valve plug, and can not block the transport route of gas, so can not cause the "pressure drop phenomenon" that the gas was carried.

In order to achieve the above object, the utility model adopts the following technical scheme:

an overheating closing device inside a valve plug of a gas switching device, wherein the gas switching device comprises: a valve seat, a valve plug controlled by a knob; the valve seat is provided with an input pore passage, an output pore passage and an inner cavity part; the inner cavity part is arranged between the input pore passage and the output pore passage so as to communicate the input pore passage and the output pore passage; the lower end of the inner cavity part is communicated with the input pore canal; the side surface of the inner cavity part is communicated with the output pore canal; the input pore canal and the output pore canal are communicated in an L shape; the valve plug is arranged in the inner cavity part to block the communication state between the input pore passage and the output pore passage; the center of the valve plug is provided with a recess with an opening bottom, and the side wall surface of the recess is provided with a through hole; the through hole can be aligned to the output pore channel by means of the rotation of the valve plug, so that the fuel gas is output; or the through hole is staggered with the output pore passage to seal the gas output path; the method is characterized in that:

the overheating sealing device includes: a circular upper cap body, a lower plug body, a compression-resistant spring and a positioning ring; the lower end of the lower plug body is provided with a flow stopping plug block, the upper end of the flow stopping plug block is connected with a convex shaft, and the convex shaft is provided with a first concave hole of which the upper end is open; 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 material, so that the upper cap body and the lower plug body are adhered and connected into a whole; the compression-resistant spring is arranged in the first concave hole of the convex shaft and is compressed between the upper cap body and the lower plug body; the upper end of the recess 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 connected with the valve plug into a whole; the positioning ring is provided with external threads and can be fixed at the inlet of the recess of the valve plug in a threaded manner; when the low-temperature tin material between the convex shaft of the lower plug body and the upper cap body is melted at high temperature, the compression-resistant spring can push the lower plug body to move downwards, so that the flow-stopping plug block of the lower plug body seals the central through hole of the positioning ring.

Wherein, this last cap body relies on high temperature hot melt adhesive to glue in the second concave hole in the cave of this valve plug.

Wherein, the outer diameter of the flow stopping chock block of the lower chock body is a cone which is gradually reduced from top to bottom; the inner diameter of the upper end of the central through hole of the positioning ring is a conical surface which is gradually reduced from top to bottom correspondingly.

The utility model discloses an effect is: when the low-temperature tin material between the convex shaft of the lower plug body and the upper cap body is melted at high temperature, the lower plug body is pushed to move downwards by virtue of the restoring force of the compression-resistant spring, so that the flow-stopping plug block of the lower plug body seals the central through hole of the positioning ring.

Drawings

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

FIG. 2 is a sectional view of the embodiment of the present invention

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

Fig. 4 is an exploded view of a superheating enclosure.

Fig. 5 is a state diagram of the flow passage being closed by the overheated closing device.

Description of reference numerals: 10-knob; 11-a latch; 12-a compression spring; 20-a valve seat; 21-an input duct; 22-an output duct; 23-an inner cavity part; 24-a horizontal channel; 30-a valve plug; 31-a recess; 32-perforation; 33-convex shaft; 331-card groove; 34-a second recess; 40-an over-flow closure device; 50-a super heated enclosure; 60-a super-heated enclosure; 61-upper cap body; 62-a lower plug body; 621-flow stop block; 622-protruding shaft; 623-a first recess; 63-compression springs; 64-a positioning ring; 641-central perforation.

Detailed Description

The utility model discloses an inside overheated closing device of gas switching device's valve plug sets up overheated closing device inside the valve plug, and not in the runner of gas, and can not cause "pressure drop phenomenon" in the gas is carried. The utility model provides a valve plug inside must possess L type runner, really uses the valve plug in novel 201821484216.X "gas switching device" patent. Please refer to fig. 2 and fig. 3. The gas switching device comprises a valve seat 20, a valve plug 30 controlled by a knob 10. The internal flow passage of the valve seat 20 is designed in an L shape, so that the input duct 21 and the output duct 22 of the fuel gas are in a mutually perpendicular communication state.

The valve seat 20 is provided with an inlet port 21, an outlet port 22, and an inner chamber portion 23. The inner cavity portion 23 is disposed between the input duct 21 and the output duct 22 to communicate the input duct 21 and the output duct 22. The lower end of the inner cavity portion 23 is communicated with the input duct 21, and the upper end is open. The side surface of the inner chamber portion 23 communicates with the outlet port 22. The input duct 21 and the output duct 22 are in L-shaped communication.

The plug 11 fixed on a knob 10 passes through the slot 331 of the protruding shaft 33 at the top of the valve plug 30 and the two horizontal grooves 24 at the top of the valve seat 20. The knob 10 can drive the plug 11 to rotate, so as to control the valve plug 30 to rotate by 90 degrees. The spring 12 is capable of generating a compressive force on the plug 30. The connection between the knob 10 and the valve plug 30 is of conventional construction and is not the technical feature claimed in the present invention, and therefore will not be described in further detail.

The valve plug 30 can be inserted into the inner cavity portion 23 of the valve seat 20 from the opening at the upper end of the valve seat 20 in a matching manner to block the communication state between the input port 21 and the output port 22. The valve plug 30 has a cavity 31 with an open bottom at the center, and a through hole 32 is formed on the side wall of the cavity 31. The plug 30 is rotated to align the bore 32 with the outlet port 22. Gas can be fed into the outlet port 22 through the inlet port 21, the recess 31, the through hole 32 and out of the valve seat 20. The plug 30 is rotated to stagger the through-hole 32 from the outlet port 22. The valve plug 30 closes the gas output path. The above features are described in the aforementioned utility model No. 201821484216.X "gas switchgear".

Please refer to fig. 2-4. The overheating closure device 60 comprises a housing provided with: a circular upper cap body 61, a lower plug body 62, a compression spring 63, and a retainer ring 64. The lower end of the lower plug 62 is a stop block 621, and the upper end of the stop block 621 is connected to a protruding shaft 622. The protruding shaft 622 has a first recess 623 with an open top. The protruding shaft 622 of the lower plug 62 is inserted into the upper cap 61, and the outer wall surface of the protruding shaft 622 and the inner wall surface of the upper cap 61 are coated with low temperature tin material, so as to fixedly connect the upper cap 61 and the lower plug 62 into a whole. The compression spring 63 is disposed in the first recess 623 of the protruding shaft 622 and compressed between the upper cap body 61 and the lower plug body 62. The cavity 31 of the valve plug 30 has a second recess 34 at its upper end. The upper cap body 61 is inserted into the second recess 34 and is fixedly connected to the valve plug 30. The retaining ring 64 is externally threaded. The valve plug 30 is provided with internal threads at the entrance of the recess 31. The retaining ring 64 is threadably secured to the inlet of the cavity 31 of the valve plug 30.

The upper cap 61 and the lower plug 62, which are integrally connected, are mostly hidden in the second recess 34, so that they are not blocked from the gas delivery path in the recess 31 of the valve plug 30. Although the retaining ring 64 is fixed at the entrance of the cavity 31, the central aperture 641 of the retaining ring 64 is relatively large to allow the gas to flow therethrough without causing a "pressure drop" in the gas delivery. In addition, a leakage-proof glue is coated between the positioning ring 64 and the inner wall surface of the recess 31 to prevent air leakage.

When the low-temperature solder between the protruding shaft 622 of the lower plug 62 and the upper cap 61 is melted by heat, the compression spring 63 loses its restraining force. The lower plug 62 is pushed to move downwards by the restoring force of the pressure-resistant spring 63, so that the flow stop block 621 of the lower plug 62 closes the central through hole of the positioning ring 64, as shown in fig. 5. The outer diameter of the stop block 621 of the lower plug 62 is a cone tapered from top to bottom. The inner diameter of the upper end of the central through hole 641 of the positioning ring 64 is a tapered surface with a downward taper. The lower edge of the stop 621 of the lower plug 62 is plugged into the central through hole 641 of the positioning ring 64, and is in a close state of slope contact.

The upper cap body 61 is adhered to the second recess 34 in the recess 31 of the valve plug 30 by means of high-temperature hot melt adhesive. The upper cap 61 may also be secured in a tight manner within the second recess 34 in the cavity 31 of the plug 30. However, the upper cap 61 must not be deformed to affect the fitting margin with respect to the protruding shaft 622. Therefore, the hot melt adhesive is preferable in practice.

In conclusion, the present invention provides an overheat sealing device 60, which is used in a gas switching device having an L-shaped gas delivery path, and is not disposed in the gas input hole 21 of the gas switching device, and thus does not affect the delivery path for blocking the gas. Therefore, the overheating seal device 60 does not cause the "pressure drop" phenomenon of the gas delivery, and is a very ideal and innovative design.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An overheating closing device inside a valve plug of a gas switching device, wherein the gas switching device comprises: a valve seat, a valve plug controlled by a knob; the valve seat is provided with an input pore passage, an output pore passage and an inner cavity part; the inner cavity part is arranged between the input pore passage and the output pore passage so as to communicate the input pore passage and the output pore passage; the lower end of the inner cavity part is communicated with the input pore canal; the side surface of the inner cavity part is communicated with the output pore canal; the input pore canal and the output pore canal are communicated in an L shape; the valve plug is arranged in the inner cavity part to block the communication state between the input pore passage and the output pore passage; the center of the valve plug is provided with a recess with an opening bottom, and the side wall surface of the recess is provided with a through hole; the through hole can be aligned to the output pore channel by means of the rotation of the valve plug, so that the fuel gas is output; or the through hole is staggered with the output pore passage to seal the gas output path; the method is characterized in that:

2. The device of claim 1, wherein the upper cap is affixed within the second recess of the valve plug by high temperature hot melt adhesive.

3. The gas switching device as defined in claim 2, wherein the outer diameter of the flow stop block of the lower plug body is a cone tapered from top to bottom; the inner diameter of the upper end of the central through hole of the positioning ring is a conical surface which is gradually reduced from top to bottom correspondingly.