Gas safety valve capable of automatically achieving circuit breaking function

Abstract

The utility model discloses a gas safety valve capable of automatically realizing a circuit breaking function, which comprises a hollow main valve body, a main valve gas inlet and a main valve gas outlet are respectively arranged on the main valve body, a low-pressure circuit breaking device is arranged at the main valve gas inlet or the main valve gas outlet, and the low-pressure circuit breaking device comprises a circuit breaking valve body. A circuit breaking air inlet and a circuit breaking air outlet are formed in the circuit breaking valve body, a circuit breaking base is arranged in the circuit breaking valve body, a plurality of vent holes are formed in the circuit breaking base, a sealing valve element is arranged in the circuit breaking valve body in a sliding mode in the direction from the circuit breaking base to the circuit breaking air outlet, the sealing valve element comprises a sealing plate, and the position of the sealing plate corresponds to the position of the vent holes. The circuit breaking base is connected with the closed valve element through a reset mechanism. The utility model aims to provide a gas safety valve which can automatically realize a circuit breaking function when the gas pressure in a gas pipeline is too high or too low.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a gas safety valve which can automatically realize a circuit breaker function. Background Art

[0002] Gas safety is one of the important issues related to daily safety. Too much or too little gas in an instant can easily lead to unsafe gas use. Too much gas in an instant can easily cause fire and explosion, and too little gas in an instant can cause incomplete combustion and produce excessive carbon monoxide. In order to ensure gas safety, gas valves are widely used in modern gas pipelines. Gas valves are devices used to cut off, connect, and adjust the gas in the pipeline. They have good control characteristics and closing and sealing performance, and are suitable for various gas medium pipelines such as city gas, liquefied petroleum gas, natural gas, oxygen, etc.

[0003] The Chinese utility model patent with patent application number ZL202020629521.4 and patent name "A gas valve with automatic shut-off" discloses a gas valve with an automatic shut-off function, which can automatically close the outlet when the air pressure at the air inlet is too high, thereby disconnecting the gas circuit.

[0004] However, the above patent also has the following problems: the gas valve cannot realize the function of automatically closing the outlet when the gas pressure is too low. In actual use scenarios, there may be a slow and trace gas leakage. If the gas valve cannot be cut off in time and effectively, there may be a trace amount of gas that will cause incomplete combustion to produce carbon monoxide, and it may also cause the leaked gas to explode when encountering an open flame and cause a fire, threatening people’s lives and property. Summary of the invention

[0005] Purpose of the utility model: The purpose of the utility model is to provide a gas safety valve which can automatically realize the circuit breaker function when the gas pressure in the gas pipeline is too high or too low.

[0006] Technical solution: The utility model discloses a gas safety valve that automatically realizes the circuit-breaking function, comprising a hollow main valve body, the main valve body is provided with a main valve air inlet and a main valve air outlet respectively, a low-pressure circuit-breaking device is arranged at the main valve air inlet or the main valve air outlet, the low-pressure circuit-breaking device comprises a circuit-breaking valve body, the circuit-breaking valve body is provided with a circuit-breaking air inlet for air inlet and a circuit-breaking air outlet for air outlet respectively, a circuit-breaking base is arranged in the circuit-breaking valve body, a plurality of vents are arranged on the circuit-breaking base, a closed valve core is slidably arranged in the circuit-breaking valve body, the closed valve core is located on the side of the circuit-breaking base facing the circuit-breaking air outlet, the closed valve core comprises a closed plate, the position of the closed plate corresponds to the position of the vent, and the circuit-breaking base is connected to the closed valve core through a reset mechanism. When the closed valve core fits the circuit-breaking base, the closed plate closes the vent, and when there is a gap between the closed valve core and the circuit-breaking base, gas can enter the circuit-breaking valve body through the vent.

[0007] Furthermore, the reset mechanism includes a plurality of magnets arranged on the circuit breaker base, and the closing plate is provided with a plurality of connection parts for magnetically connecting with the magnets.

[0008] Furthermore, the magnet is arranged at the center of the circuit breaker base, and the connecting portion is a connecting column arranged along the central axis for magnetically connecting with the magnet. The entire material of the connecting column or the material at the connection between the connecting column and the magnet is a magnetic material.

[0009] Furthermore, the diameter of the closing plate is smaller than the inner diameter of the circuit breaker body.

[0010] Furthermore, a plurality of closed through holes for ventilation are provided on the closed plate, and the positions of the closed through holes correspond to the positions of the circuit breaker base.

[0011] Whether the diameter of the closing plate is smaller than the inner diameter of the circuit-breaking valve body, or a closed through hole is opened on the closing plate, it is to enable the gas to pass through the low-pressure circuit-breaking device better and more efficiently when a gap is formed between the closing valve core and the circuit-breaking base to form a passage, thereby preventing poor gas supply.

[0012] Furthermore, a limit cover is provided in the circuit breaker body in the direction of the closed valve core toward the circuit breaker outlet, and a plurality of limit through holes for gas to pass through are provided on the limit cover. The limit cover is used to limit the closed valve core to prevent the position between the closed valve core and the circuit breaker base from being too far away when the airflow pressure is too large, exceeding the magnetic attraction of the magnet, which will cause the closed valve core to lose the ability to reset and close, and the circuit breaker body to fail.

[0013] Furthermore, an auxiliary spring is arranged between the limit cover and the closing valve core, and the auxiliary spring is used to assist the closing valve core in resetting.

[0014] Furthermore, the low-pressure circuit breaker device is detachably connected to the main valve air inlet or the main valve air outlet via threads, and the limit cover is detachably connected to the circuit breaker body via threads.

[0015] Furthermore, an overload sealing area is arranged in the main valve body, and the overload sealing area includes a first annular wall and a second annular wall arranged opposite to each other, the first annular wall is located on a side close to the air inlet of the main valve, and a first through hole and a second through hole for gas to pass through are respectively provided on the first annular wall and the second annular wall, and a closed ball is arranged in the cavity formed by the first annular wall and the second annular wall, and the distance between the first annular wall and the second annular wall is smaller than the diameter of the closed ball, and the diameter of the closed ball is larger than the diameter of the second through hole; a support portion is arranged above the closed ball, and the support portion is connected to the top of the closed ball by a reset spring; an air storage chamber can be formed between the bottom of the closed ball and the first annular wall and the second annular wall, and a plurality of buffer channels communicating with the air storage chamber are provided on the first annular wall.

[0016] Furthermore, a ball valve for realizing manual opening or closing function is also arranged in the main valve body.

[0017] Furthermore, a filter is provided at the air inlet of the main valve.

[0018] Beneficial effect: The "low air pressure" in the utility model refers to the air pressure that cannot overcome the magnetic attraction between the magnet and the closed valve core. Compared with the prior art, the utility model has the following advantages: 1. A low-pressure circuit breaker is provided in the utility model. Since the closed valve core in the low-pressure circuit breaker is located on the side of the circuit breaker base facing the circuit breaker outlet, that is to say, after the gas enters the low-pressure circuit breaker from the circuit breaker inlet, it needs to first pass through the passage between the circuit breaker base and the closed valve core before flowing out from the circuit breaker outlet. There is a magnetic attraction between the magnet set on the circuit breaker base and the closed valve core. If the gas pressure is less than the magnetic attraction, the gas cannot push the closed valve core. The closed valve core closes the air vent on the circuit breaker base, and the airway is automatically disconnected. ; When the gas pressure is within the normal range, the gas can push the closed valve core, and a passage is formed between the circuit breaker base and the closed valve core, so that the gas can pass through the low-pressure circuit breaker device normally; 2. An overload closed area is set in the main valve body. After the gas enters the main valve body, part of the gas will enter the gas storage chamber through the buffer channel. When the gas pressure is normal, the gas pressure in the gas storage chamber is less than the elastic force of the reset spring, and the closed ball is pressed in the middle and lower part of the cavity formed by the first annular wall and the second annular wall. If the gas pressure is too high, the gas pressure in the gas storage chamber is greater than the elastic force of the reset spring, and the closed ball will be pushed upward. Combined with the lateral effect of the gas, the closed ball will close the second through hole, and the gas passage will automatically be disconnected to prevent deflagration or even explosion or fire caused by excessive gas pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a three-dimensional combination diagram of the utility model from one angle.

[0020] Figure 2 It is a three-dimensional combination diagram of the utility model from another angle.

[0021] Figure 3 It is a three-dimensional diagram of the low-pressure circuit breaker device of the utility model.

[0022] Figure 4 It is a cross-sectional view of the first embodiment of the low-pressure circuit breaker device of the utility model.

[0023] Figure 5 It is a cross-sectional view of the second embodiment of the low-pressure circuit breaker device of the utility model.

[0024] Figure 6 It is a cross-sectional view of the main valve part in the utility model.

[0025] Wherein: 1. main valve part; 101. main valve air inlet; 102. main valve body; 103. first annular wall; 1031. first through hole; 104. button; 105. reset spring; 106. handle; 107. main valve air outlet; 108. ball valve; 109. second annular wall; 1091. second through hole; 110. closed ball; 111. air storage chamber; 112. buffer channel; 113. filter; 2. low pressure circuit breaker; 201. circuit breaker air inlet; 202. circuit breaker valve body; 203. limit cover; 204. circuit breaker air outlet; 2051. closing plate; 2052. connecting column; 2053. closed through hole; 206. circuit breaker base; 2061. vent; 207. magnet; 208. auxiliary guide rod; 209. auxiliary plate; 210. auxiliary spring. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0027] See attached Figure 1 to Figure 6 A gas safety valve for automatically realizing a circuit breaker function shown in the utility model comprises a main valve part 1 and a low-pressure circuit breaker device 2.

[0028] The main valve portion 1 includes a hollow main valve body 102, and the main valve body 102 is respectively provided with a main valve air inlet 101 and a main valve air outlet 107, and the inlet and outlet directions of the gas are shown by arrows. A low-pressure circuit breaker 2 is arranged at the main valve air inlet 101 or the main valve air outlet 107, and an overload sealing area is arranged in the main valve body 102, and the overload sealing area includes a first annular wall 103 and a second annular wall 109 arranged opposite to each other, and the first annular wall 103 is located on a side close to the main valve air inlet 101, and a first through hole 1031 and a second through hole 1091 for gas to pass through are respectively provided on the first annular wall 103 and the second annular wall 109, and a sealing ball 110 is arranged in the cavity formed by the first annular wall 103 and the second annular wall 109, and the first annular wall 103 and the second annular wall 109 are provided with a sealing ball 110, and the first annular wall 103 and the second The distance between the annular walls 109 is smaller than the diameter of the closed ball 110, and the diameter of the closed ball 110 is larger than the diameter of the second through hole 1091; a support portion is arranged above the closed ball 110, and the support portion is connected to the top of the closed ball 110 through a reset spring 105, and a button 104 is arranged above the reset spring 105; an air storage chamber 111 can be formed between the bottom of the closed ball 110, the first annular wall 103 and the second annular wall 109, and a plurality of buffer channels 112 communicating with the air storage chamber 111 are opened on the first annular wall 103; a ball valve 108 for realizing a manual opening or closing function is also arranged in the main valve body 102, and a handle 106 for manual control is arranged on the top of the ball valve 108; a filter screen 113 is arranged at the air inlet 101 of the main valve.

[0029] The low-pressure circuit breaker device 2 is arranged at the main valve air inlet 101 or the main valve air outlet 107 by means of threads. The low-pressure circuit breaker device 2 in the utility model provides two embodiments. Example

[0030] like Figure 4As shown, the low-pressure circuit breaker device 2 includes a circuit breaker valve body 202, and a circuit breaker air inlet 201 for air intake and a circuit breaker air outlet 204 for air outlet are respectively provided in the circuit breaker valve body 202, and the inlet and outlet directions of the gas are shown by arrows. A circuit breaker base 206 is provided in the circuit breaker valve body 202, and a plurality of vents 2061 are provided on the circuit breaker base 206. A closed valve core is slidably provided in the circuit breaker valve body 202, and the closed valve core is located on the side of the circuit breaker base 206 facing the circuit breaker air outlet 204. The closed valve core includes a closed plate 2051, and the diameter of the closed plate 2051 is smaller than the inner diameter of the circuit breaker valve body 202, and the position of the closed plate 2051 is close to the vents. Corresponding to the position of 2061, the circuit breaker base 206 is connected to the closed valve core through a reset mechanism; the reset mechanism includes a magnet 207 arranged in the center of the circuit breaker base 206, and a connecting column 2052 extending along the central axis direction and used for magnetic connection with the magnet 207 is arranged at the center position of the closing plate 2051, and the entire material of the connecting column 2052 or the material at the connection between the connecting column 2052 and the magnet 207 is a magnetic material; a limit cover 203 is threadedly arranged in the direction of the closed valve core toward the circuit breaker outlet 204 in the circuit breaker valve body 202, and a plurality of limit through holes for gas to pass through are opened on the limit cover 203. Example

[0031] like Figure 5As shown, the low-pressure circuit breaker device 2 includes a circuit breaker valve body 202, in which a circuit breaker air inlet 201 for air intake and a circuit breaker air outlet 204 for air outlet are respectively provided, and the inlet and outlet directions of the gas are shown by arrows. A circuit breaker base 206 is provided in the circuit breaker valve body 202, and a plurality of vent holes 2061 are provided on the circuit breaker base 206. A closed valve core is slidably provided in the circuit breaker valve body 202, and the closed valve core is located on the side of the circuit breaker base 206 facing the circuit breaker air outlet 204. The closed valve core includes a closing plate 2051, and the position of the closing plate 2051 corresponds to the position of the vent hole 2061. The closing plate 2051 is provided with a plurality of closed through holes 2053 for ventilation, and the position of the closed through holes 2053 corresponds to the position of the circuit breaker base 206. The circuit breaker base 206 is connected to the closed valve core through a reset mechanism; the reset mechanism includes a magnet 2051 arranged at the center of the circuit breaker base 206. 7. A connecting column 2052 extending along the central axis direction and used for magnetic connection with the magnet 207 is set at the central position of the closing plate 2051. The entire material of the connecting column 2052 or the material at the connection between the connecting column 2052 and the magnet 207 is a magnetic material; a limit cover 203 is set by a thread in the direction of the closed valve core toward the circuit breaker outlet 204 in the circuit breaker valve body 202, and a plurality of limit through holes for gas to pass through are provided on the limit cover 203. The reset mechanism also includes an auxiliary plate 209 arranged in the limit cover 203, and the auxiliary plate 209 does not completely close the limit through hole. An auxiliary guide rod 208 for guiding the auxiliary spring 210 is set between the closing plate 2051 and the auxiliary plate 209. One end of the auxiliary spring 210 abuts against the closing plate 2051, and the other end of the auxiliary spring 210 abuts against the auxiliary plate 209. The auxiliary spring 210 is used to assist the closing valve core in resetting.

Claims

1. A gas safety valve with automatic circuit breaker function, characterized in that: The invention comprises a hollow main valve body (102), wherein the main valve body (102) is provided with a main valve air inlet (101) and a main valve air outlet (107), wherein a low-pressure circuit breaker device (2) is arranged at the main valve air inlet (101) or the main valve air outlet (107), wherein the low-pressure circuit breaker device (2) comprises a circuit breaker valve body (202), wherein the circuit breaker valve body (202) is provided with a circuit breaker air inlet (201) and a circuit breaker air outlet (204) for air outlet, ... main valve air outlet (107) for air outlet, wherein the circuit breaker valve body (202) is provided with a circuit breaker air inlet (201) and a main valve air outlet (107) for air outlet, wherein the circuit breaker valve body (202) is provided with a circuit breaker air inlet (201) and a main valve air outlet (107) for air outlet, wherein the circuit breaker valve body (202) is provided with a circuit breaker air inlet (201) and a main valve air outlet (107) for air outlet, wherein the circuit breaker valve body (202) is provided with a circuit breaker ) is provided in a circuit breaker base (206), a plurality of vent holes (2061) are provided on the circuit breaker base (206), a closed valve core is slidably provided in the circuit breaker valve body (202), the closed valve core is located on a side of the circuit breaker base (206) facing the circuit breaker air outlet (204), the closed valve core comprises a closed plate (2051), the position of the closed plate (2051) corresponds to the position of the vent holes (2061), and the circuit breaker base (206) is connected to the closed valve core via a reset mechanism.

2. A gas safety valve with automatic circuit breaker function according to claim 1, characterized in that: The reset mechanism comprises a plurality of magnets (207) arranged on a circuit breaker base (206), and the closing plate (2051) is provided with a plurality of connection parts for magnetically connecting with the magnets (207).

3. A gas safety valve with automatic circuit breaker function according to claim 2, characterized in that: The magnet (207) is arranged at the center of the circuit breaker base (206), and the connecting portion is a connecting column (2052) arranged along the center axis direction.

4. A gas safety valve with automatic circuit breaker function according to claim 1, characterized in that: The diameter of the closing plate (2051) is smaller than the inner diameter of the cut-off valve body (202).

5. A gas safety valve with automatic circuit breaker function according to claim 1, characterized in that: A plurality of closed through holes (2053) for ventilation are provided on the closed plate (2051); the positions of the closed through holes (2053) correspond to the positions of the circuit breaker base (206).

6. A gas safety valve with automatic circuit breaker function according to claim 1, characterized in that: A limit cover (203) is arranged inside the circuit-breaking valve body (202) in the direction of the closed valve core toward the circuit-breaking gas outlet (204), and a plurality of limit through holes for gas to pass through are provided on the limit cover (203).

7. A gas safety valve with automatic circuit breaker function according to claim 6, characterized in that: An auxiliary spring (210) is provided between the limiting cover (203) and the closing valve core.

8. A gas safety valve with automatic circuit breaker function according to claim 1, characterized in that: An overload sealing area is arranged in the main valve body (102), and the overload sealing area comprises a first annular wall (103) and a second annular wall (109) arranged opposite to each other, the first annular wall (103) is located on a side close to the main valve air inlet (101), a first through hole (1031) and a second through hole (1091) are respectively provided on the first annular wall (103) and the second annular wall (109), a sealing ball (110) is arranged in the cavity formed by the first annular wall (103) and the second annular wall (109), and the first annular wall (103) and the second annular wall (109) are provided with a sealing ball (110). The distance between the first and second through holes (109) is smaller than the diameter of the closed ball (110), and the diameter of the closed ball (110) is larger than the diameter of the second through hole (1091); a support portion is provided above the closed ball (110), and the support portion is connected to the top of the closed ball (110) via a return spring (105); an air storage chamber (111) can be formed between the bottom of the closed ball (110), the first annular wall (103) and the second annular wall (109), and a plurality of buffer channels (112) communicating with the air storage chamber (111) are provided on the first annular wall (103).

9. A gas safety valve with automatic circuit breaker function according to claim 1, characterized in that: A ball valve (108) for realizing a manual opening or closing function is also provided in the main valve body (102).

10. A gas safety valve with automatic circuit breaker function according to claim 1, characterized in that: A filter screen (113) is provided at the main valve air inlet (101).

Images