CN216045664U

CN216045664U - Gas pipe overcurrent protection device

Info

Publication number: CN216045664U
Application number: CN202121435119.3U
Authority: CN
Inventors: 肖保中; 王江华; 卜明明
Original assignee: Keesung Manufacturing Co ltd
Current assignee: Keesung Manufacturing Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-03-15
Anticipated expiration: 2031-06-25

Abstract

The utility model relates to the technical field of gas pipes, in particular to an over-current protection device for a gas pipe, wherein the gas inlet end of the gas pipe is communicated with a pressure reducing valve, the over-current protection device comprises a connector communicated with the gas inlet end of the pressure reducing valve, a gas inlet section, a first inner cavity, a second inner cavity, a third inner cavity and a gas outlet section are sequentially arranged in the connector, the inner diameters of the first inner cavity, the second inner cavity and the third inner cavity are sequentially reduced along the gas flowing direction, a sphere is arranged in the first inner cavity, an elastic piece is arranged in the second inner cavity, and the elastic piece extends from the bottom of the second inner cavity into the first inner cavity and is used for supporting the sphere. According to the utility model, by means of the arrangement of the ball body and the elastic piece, when the air pressure of the entering gas is too high, the ball body compresses the elastic piece, so that the elastic piece is propped against the step in the joint, namely the joint of the first inner cavity and the second inner cavity, the air flow is cut off, the pressure reducing valve and the gas pipe are prevented from being damaged due to the impact of high-pressure gas, the faults such as leakage and the like are prevented, and the service lives of the gas pipe and the pressure reducing valve are prolonged.

Description

Gas pipe overcurrent protection device

Technical Field

The utility model relates to the technical field of gas pipes, in particular to an overcurrent protection device for a gas pipe.

Background

The gas is a general name of people for gas fuel and can be divided into liquefied petroleum gas, natural gas and coal gas. The gas is generally transferred through a pipeline and loaded into a storage tank for transportation or standby, and in some devices requiring gas as fuel, such as an electric oven or an oven, a gas pipe joint is required to be connected with the storage tank so as to continuously deliver gas for ignition to heat food. The gas is colorless, tasteless and odorless, and in order to ensure stable gas output pressure and prevent sudden pressure change from breaking a pipeline to cause leakage, a pressure reducing valve is usually arranged at a joint to keep stable pressure of the gas in use, so that a stable fuel-air ratio of a gas appliance is ensured. The flow characteristic of a pressure reducing valve is generally such that the lower the output pressure, the less it fluctuates with changes in the output flow, and therefore, the pressure of the input gas cannot be too great to avoid damage to the pressure reducing valve. However, since different gas storage tanks are connected to different internal pressures, when a user uses the wrong gas storage tank due to misoperation, the output gas pressure is too high, and the pressure reducing valve fails.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model aims to provide an overcurrent protection device for a gas pipe. According to the utility model, by means of the arrangement of the ball body and the elastic piece, when the air pressure of the entering gas is too high, the ball body compresses the elastic piece, so that the elastic piece is propped against the step in the joint, namely the joint of the first inner cavity and the second inner cavity, the air flow is cut off, the pressure reducing valve and the gas pipe are prevented from being damaged due to the impact of high-pressure gas, the faults such as leakage and the like are prevented, and the service lives of the gas pipe and the pressure reducing valve are prolonged.

According to the gas pipe overcurrent protection device, the gas inlet end of the gas pipe is communicated with the pressure reducing valve, the overcurrent protection device comprises a connector communicated with the gas inlet end of the pressure reducing valve, a gas inlet section, a first inner cavity, a second inner cavity, a third inner cavity and a gas outlet section are sequentially arranged in the connector, the inner diameters of the first inner cavity, the second inner cavity and the third inner cavity are sequentially reduced along the gas flowing direction, a sphere is arranged in the first inner cavity, an elastic piece is arranged in the second inner cavity, and the elastic piece extends from the bottom of the second inner cavity into the first inner cavity and is used for supporting the sphere.

In one embodiment, the first lumen has a length and an inner diameter that are both greater than a diameter of the sphere, and the second lumen has an inner diameter that is less than the diameter of the sphere.

In one embodiment, the inner diameter of the air inlet section of the joint is larger than that of the first inner cavity, an ejection piece is fixedly arranged in the air inlet section, and one end of the ejection piece extends outwards and protrudes out of the joint.

In one embodiment, the inside diameter of the ejector is smaller than the diameter of the sphere.

In one embodiment, the ball is a steel ball, the elastic element is a compression spring, and when the compression spring is in a free state, the distance between the ball and the bottom surface of the first cavity is 3-8 mm.

In one embodiment, the outer side of the air outlet section of the joint is in threaded connection with the inner side of the air inlet end of the pressure reducing valve, a hand wheel is sleeved on the outer side of the air inlet end of the pressure reducing valve, and the inner side of the hand wheel is in threaded connection with the outer side of the joint.

In one embodiment, a pipe sleeve is fixedly arranged at the gas outlet end of the pressure reducing valve, a groove sleeved with the gas pipe is formed between the pipe sleeve and the outer side wall of the gas outlet end of the pressure reducing valve, and grains for increasing friction force are further arranged on the outer side wall of the gas outlet end of the pressure reducing valve.

Compared with the prior art, the technical scheme of the utility model has the beneficial effects that:

1. according to the utility model, by means of the arrangement of the ball body and the elastic piece, when the air pressure of the entering gas is too high, the ball body compresses the elastic piece, so that the elastic piece is propped against the step in the joint, namely the joint of the first inner cavity and the second inner cavity, the air flow is cut off, the pressure reducing valve and the gas pipe are prevented from being damaged due to the impact of high-pressure gas, the faults such as leakage and the like are prevented, and the service lives of the gas pipe and the pressure reducing valve are prolonged.

2. The back-open piece is when being connected for the pipe connection with input gas for the one-way of back-open pipeline seals to make gaseous intercommunication, simultaneously, the back-open piece can restrict the spheroid in first inner chamber, even spheroid and elastic component break away from, has not had the impact of atmospheric pressure when closing the pipeline, and the spheroid can not reverse drop out yet.

3. In order to ensure the service life of the ball body and the elastic element, the ball body and the elastic element are made of steel materials to enhance the corrosion resistance, the pressure resistance and the like, when the stress of the air inlet surface of the spherical surface of the steel ball is larger than the force of 3-8mm compression of the spring, the steel ball can prop against the step in the steel joint to cut off the air flow, thus ensuring the air input pressure to be within the range of 25-250PSIG and not influencing the normal adjustment work of the pressure reducing valve.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is a front sectional view of embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of embodiment 2 of the present invention;

fig. 4 is a front sectional view of embodiment 2 of the present invention.

Description of reference numerals: 1-gas pipe, 2-pressure reducing valve, 3-joint, 31-first inner cavity, 32-second inner cavity, 33-third inner cavity, 4-sphere, 5-elastic piece, 6-ejection piece, 7-hand wheel and 8-pipe sleeve.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1-4, in the gas pipe overcurrent protection device of the present invention, an air inlet end of a gas pipe 1 is communicated with a pressure reducing valve 2, the overcurrent protection device includes a connector 3 communicated with the air inlet end of the pressure reducing valve 2, an air inlet section, a first inner cavity 31, a second inner cavity 32, a third inner cavity 33 and an air outlet section are sequentially arranged in the connector 3, inner diameters of the first inner cavity 31, the second inner cavity 32 and the third inner cavity 33 are sequentially reduced along an air flow direction, a sphere 4 is arranged in the first inner cavity 31, an elastic member 5 is arranged in the second inner cavity 32, and the elastic member 5 extends from a bottom of the second inner cavity 32 to the first inner cavity 31 and is used for supporting the sphere 4. According to the utility model, by means of the arrangement of the ball body 4 and the elastic piece 5, when the pressure of the entering gas is too high, the ball body 4 compresses the elastic piece 5, so that the step in the joint 3, namely the joint of the first inner cavity 31 and the second inner cavity 32 is propped against, the gas flow is cut off, the pressure reducing valve 2 and the gas pipe 1 are prevented from being damaged due to the impact of high-pressure gas, the faults such as leakage and the like are prevented, and the service lives of the gas pipe 1 and the pressure reducing valve 2 are prolonged.

In the practical use process, the applicant notices that the oven used outdoors, the gas pipe 1 and the pressure reducing valve 2 which are connected and used need to be maintained and repaired frequently, the relative density of gas to air is 0.554, the density of gas is 0.716kg in a standard state, the permeability of gas is 1.6 times of that of air, the gas is difficult to dissolve in water, cannot support combustion and can not maintain breathing, and when a certain concentration is reached, people can suffocate due to oxygen deficiency, and can be burnt or exploded. So that its safety needs to be taken care of even when used outdoors. The pressure reducing valve 2 often suffers from a fault that the input air pressure is too large, so that the fluctuation of the adjusting range is large when the pressure is reduced stably, the stable output air pressure cannot be maintained, and meanwhile, the adjusting piece is damaged due to large impact. Therefore, this device is when designing, add spheroid 4 and elastic component 5 on original basis, spheroid 4 is influenced and fluctuate by the atmospheric pressure of input, spheroid 4 generally is supported by elastic component 5 and lets first inner chamber 31 and second inner chamber 32 keep the intercommunication, in case surpass and predetermine the atmospheric pressure value, spheroid 4 will be pressed and is close to second inner chamber 32, and because its atress is greater than the bounce of elastic component 5, so that the air inlet of second inner chamber 32 is blocked up completely to spheroid 4, thereby cut off the gaseous inflow of gas when atmospheric pressure is great, guarantee that input atmospheric pressure is not greater than the control range of relief pressure valve 2, in order to ensure the stable regulation effect of relief pressure valve 2.

Further, the first lumen 31 has a length and an inner diameter both greater than the diameter of the sphere 4, and the second lumen 32 has an inner diameter less than the diameter of the sphere 4. The ball 4 can be connected with one end of the elastic element 5, can also be arranged in the first inner cavity 31 and is not connected with the elastic element 5, and when the stress is smaller than the elastic force of the elastic element 5, the second inner cavity 32 can not be blocked; however, in order to ensure the practical function of the ball 4, it is necessary that the diameter of the ball does not affect the gas flow in the first cavity 31, and at the same time, the ball completely blocks the second cavity 32 when the gas pressure is high, and the ball falls into the first cavity 31 again when the gas pressure is recovered.

Further, the inner diameter of the air inlet section of the joint 3 is larger than that of the first inner cavity 31, the jacking piece 6 is fixedly arranged in the air inlet section, and one end of the jacking piece 6 extends outwards and protrudes out of the joint 3. The piece 6 that opens on the top is for when being connected with the pipeline of input gas, a one-way sealing for pushing up the pipeline to make gaseous intercommunication, simultaneously, 6 internal diameters of piece 6 that open on the top are less than spheroid 4 diameter, and usable piece 6 that opens on the top restricts spheroid 4 in first inner chamber 31, even it breaks away from with elastic component 5, has not had the impact of atmospheric pressure when closing the pipeline, spheroid 4 can not reverse the dropping out yet.

Further, the ball 4 is a steel ball, the elastic element 5 is a compression spring, and when the compression spring is in a free state, the distance between the ball 4 and the bottom surface of the first cavity 31 is 3-8 mm. In order to ensure the service life of the ball body 4 and the elastic part 5, the ball body 4 and the elastic part are made of steel materials to enhance the corrosion resistance, the pressure resistance and the like, when the stress of the air inlet surface of the spherical surface of the steel ball is larger than the force of 3-8mm compression of the spring, the steel ball can prop against the step in the steel joint 4 to cut off the air flow, thus ensuring that the air input pressure is in the range of 25-250PSIG and not influencing the normal adjustment work of the pressure reducing valve 2.

Further, the outer side of the air outlet section of the connector 3 is in threaded connection with the inner side of the air inlet end of the pressure reducing valve 2, a hand wheel 7 is further sleeved on the outer side of the air inlet end of the pressure reducing valve 2, and the inner side of the hand wheel 7 is in threaded connection with the outer side of the connector 3. The joint 3 is fixedly connected with the pressure reducing valve 2 through threads, and meanwhile the pressure reducing valve 2 is sleeved with the hand wheel 7, for example, an annular groove is formed to limit radial movement of the hand wheel 7, so that the hand wheel 7 is prevented from being separated from the pressure reducing valve 2, the hand wheel 7 can be connected with the joint 3 through threads of the hand wheel 7, the relative position of the joint 3 and the pressure reducing valve 2 is further fixed, and gas is prevented from leaking at the joint.

Further, a pipe sleeve 8 is fixedly arranged at the air outlet end of the pressure reducing valve 2, a groove which is sleeved with the gas pipe 1 is formed on the outer side wall of the air outlet end of the pipe sleeve 8 and the pressure reducing valve 2, and grains for increasing friction force are further arranged on the outer side wall of the air outlet end of the pressure reducing valve 2. The connection mode of the pressure reducing valve 2 and the gas pipe 1 is also to further reinforce the connection and avoid the separation and leakage, and the grooves formed by the pipe sleeve 8 and the outer side wall of the gas outlet end of the pressure reducing valve 2 are nested with the gas pipe 1 in an embedded manner, and the grooves are provided with lines for increasing friction force inside to avoid the separation of the gas pipe 1 under stress. In addition, the other end of the gas pipe 1 can be fixedly connected to the connector in this way.

Example 1

As shown in fig. 1-2, the air inlet end of the pressure reducing valve 2 directly faces the blocking piece of the pressure reducing valve 2, so the joint 3 needs to be connected below the pressure reducing valve 2, a proper hand wheel 7 is sleeved outside the downward air inlet end of the pressure reducing valve 2, the joint 3 is installed on the air inlet end of the pressure reducing valve 2 through threads, then the hand wheel 7 is moved and screwed with the joint 3 through the threads, a step can be further arranged outside the joint 3, and a gasket is arranged between the step and the hand wheel 7 to avoid the threads from being worn due to over screwing, so that the step can be disassembled and assembled for use for many times. Then, the elastic member 5 is placed in the second cavity 32, so that one end of the elastic member 5 is in contact with or welded and fixed to the bottom of the second cavity 32, and the other end is connected with the ball 4, thereby confirming that the ball 4 is in the first cavity 31. Finally, the ejection piece 6 is embedded to complete the installation. When the introduced air pressure is too large, the ball 4 and the elastic member 5 can realize the function of cutting off the air flow.

Example 2

As shown in fig. 3-4, different from embodiment 1, the inlet end and the outlet end of the pressure reducing valve 2 extend in parallel, but the inside of the inlet end is also bent to face the blocking piece of the pressure reducing valve 2, so the joint 3 needs to be connected to one side of the pressure reducing valve 2, a suitable hand wheel 7 is sleeved on the outer side of the inlet end of one side of the pressure reducing valve 2, the joint 3 is installed on the inlet end of the pressure reducing valve 2 through threads, then the hand wheel 7 is moved and screwed with the joint 3 through the threads, a step can be further arranged on the outer side of the joint 3, and a gasket is arranged between the step and the hand wheel 7 to avoid the threads from being worn due to over screwing, so that the step can be disassembled and assembled for use for many times. Then, the elastic member 5 is placed in the second cavity 32, so that one end of the elastic member 5 is in contact with or welded and fixed to the bottom of the second cavity 32, and the other end is connected with the ball 4, thereby confirming that the ball 4 is in the first cavity 31. Finally, the ejection piece 6 is embedded to complete the installation. The ball 4 and the elastic element 5 can also achieve the function of cutting off the air flow when the air pressure is over-high.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse explanation, these directional terms do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present application.

In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a gas pipe overcurrent protection device, the inlet end intercommunication of gas pipe (1) has relief pressure valve (2), a serial communication port, overcurrent protection device include with joint (3) that relief pressure valve (2) inlet end communicates, be equipped with air inlet section, first inner chamber (31), second inner chamber (32), third inner chamber (33) and the section of giving vent to anger in proper order in joint (3), first inner chamber (31) second inner chamber (32) with the internal diameter of third inner chamber (33) reduces along the gas flow direction in proper order, be equipped with spheroid (4) in first inner chamber (31), be equipped with elastic component (5) in second inner chamber (32), elastic component (5) by the bottom of second inner chamber (32) extends to in first inner chamber (31) and be used for the support spheroid (4).

2. The gas pipe excess flow protection device of claim 1, wherein the first inner cavity (31) has a length and an inner diameter which are both larger than the diameter of the sphere (4), and the second inner cavity (32) has an inner diameter which is smaller than the diameter of the sphere (4).

3. The gas pipe overcurrent protection device as set forth in claim 1 or 2, wherein the inner diameter of the air inlet section of the joint (3) is larger than the inner diameter of the first inner cavity (31), the air inlet section is fixedly provided with a pushing-open member (6), and one end of the pushing-open member (6) extends outwards and protrudes out of the joint (3).

4. The gas pipe overcurrent protection device as set forth in claim 3, wherein the inside diameter of the ejector (6) is smaller than the diameter of the sphere (4).

5. The gas pipe overcurrent protection device as set forth in claim 1, 2 or 4, wherein the ball (4) is a steel ball, the elastic member (5) is a compression spring, and when the compression spring is in a free state, the distance between the ball (4) and the bottom surface of the first cavity (31) is 3-8 mm.

6. The gas pipe overcurrent protection device according to claim 1, wherein the outer side of the gas outlet section of the joint (3) is in threaded connection with the inner side of the gas inlet end of the pressure reducing valve (2), a hand wheel (7) is further sleeved on the outer side of the gas inlet end of the pressure reducing valve (2), and the inner side of the hand wheel (7) is in threaded connection with the outer side of the joint (3).

7. The gas pipe overcurrent protection device according to claim 1, wherein a pipe sleeve (8) is fixedly arranged at the gas outlet end of the pressure reducing valve (2), a groove which is sleeved with the gas pipe (1) is formed by the pipe sleeve (8) and the outer side wall of the gas outlet end of the pressure reducing valve (2), and the outer side wall of the gas outlet end of the pressure reducing valve (2) is further provided with lines for increasing friction force.