CN115978256B

CN115978256B - Gas influenza valve

Info

Publication number: CN115978256B
Application number: CN202211668665.0A
Authority: CN
Inventors: 李杨俊; 彭汉平; 颜贻斌; 辛平
Original assignee: Zhejiang Yongdexin Technology Co ltd
Current assignee: Zhejiang Yongdexin Technology Co ltd
Priority date: 2022-12-24
Filing date: 2022-12-24
Publication date: 2023-07-14
Anticipated expiration: 2042-12-24
Also published as: CN115978256A

Abstract

The application discloses a gas overflows influenza closed valve relates to the gas valve field, and it includes the valve body, is equipped with the air guide channel in the valve body, is equipped with the excessive current case subassembly that is used for carrying out the excessive current protection to the air guide channel in the valve body, still is equipped with the regulating part in the valve body, and the valve body is equipped with the driving part of being connected with the regulating part, still includes gas sensing control module; when the gas sensing control module detects that the concentration of the external gas rises, the control driving piece operates to enable the adjusting piece to be adjusted to a state that the air inlet end and the air outlet end of the air guide channel are disconnected. The gas leakage protection device has the advantages that the adjusting piece, the driving piece and the gas sensing control module are arranged, the valve can be closed timely when the leakage protection is not triggered, and further the condition that the gas leakage can not trigger the gas overcurrent protection to cause continuous leakage of the gas is reduced, so that the whole use is safer.

Description

Gas influenza valve

Technical Field

The present application relates to the field of gas valves, and more particularly, to a gas over-flow shut-off valve.

Background

The gas overflow valve is used for cutting off a medium flow channel when a large amount of medium in a gas pipeline leaks to cause excessive flow.

The existing gas overflow valve is arranged between a gas supply system and a gas appliance, when a pipeline is broken between the gas overflow valve and the gas appliance or when the gas flow rate is suddenly increased due to other special conditions, the gas overflow protection can be triggered at the moment to realize the closing of the valve, but when only leakage occurs between the gas overflow valve and the gas appliance, the leakage is not so long as to reach the gas flow rate required by the overflow protection triggering, the condition of continuous leakage of the gas is caused at the moment, and the improvement is needed.

Disclosure of Invention

In order to reduce the condition that the gas leakage can not trigger the gas overcurrent protection to lead to the gas continuous leakage, the application provides a gas overcurrent shutoff valve.

The application provides a gas crosses influenza valve that closes adopts following technical scheme:

the gas flow-through closing valve comprises a valve body, wherein an air guide channel is arranged in the valve body, a flow-through valve core assembly for performing flow-through protection on the air guide channel is arranged in the valve body, an adjusting piece is further arranged in the valve body, and the valve body is provided with a driving piece connected with the adjusting piece and further comprises a gas sensing control module;

when the gas sensing control module detects that the concentration of the external gas rises, the driving part is controlled to operate, so that the adjusting part is adjusted to a state that the gas inlet end and the gas outlet end of the gas guide channel are disconnected.

Through above-mentioned technical scheme, through setting up regulating part, driving piece and gas response control module, when taking place the gas seepage, the gas response control module detects that external gas concentration rises the back control driving piece drives the regulating part and adjusts to the state that is in the outage with the inlet end and the outlet end of air guide passageway, also can in time realize closing of valve when realizing leakage protection not triggered, and then reduced that the gas appears leaking can not trigger the condition that the gas overflowed protection leads to the gas to last seepage for whole use is safer.

Optionally, the overcurrent valve core assembly includes a mounting seat, a valve core member and a return spring, the mounting seat is located in the air guide channel, the mounting seat is provided with an air guide hole, and the air inlet end and the air outlet end of the air guide channel are communicated through the air guide hole; the valve core piece slides relative to the mounting seat, the reset spring is arranged in the air guide channel, and the elastic force of the reset spring enables the valve core piece to have a trend of being far away from the air guide hole;

when the air flow input flow speed in the air guide channel is larger than a preset value, the valve core piece is driven by air flow to overcome the elastic force of the reset spring to move towards the air guide hole and block the air guide hole, so that the overcurrent valve core component is in a cut-off state.

Through the technical scheme, when the air flow in the air guide channel is larger than the preset value, the valve core piece moves towards the air guide hole and seals the air guide hole under the driving of the air flow, so that the valve core is in an off-state, and the gas flow-through closing valve is in a closed state.

Optionally, the valve body is further provided with a filter screen, and the filter screen is located at one side of the overflow valve core assembly, which is close to the air inlet end of the air guide channel.

Through above-mentioned technical scheme, the filter screen protects the excessive current case subassembly, reduces the condition of granule debris striking the excessive current case subassembly in the air current transportation process for holistic use is more stable.

Optionally, the valve body includes a front valve portion and a rear valve portion that are detachably spliced, the front valve portion and the rear valve portion each have a channel, and the channels of the front valve portion and the rear valve portion are communicated to form the air guide channel; a mounting groove is formed in one end, close to the rear valve part, of the front valve part, and the mounting groove is communicated with the channel of the front valve part;

the mounting seat comprises a first annular sleeve and a second annular sleeve, the first annular sleeve is embedded in the mounting groove, the first annular sleeve is provided with a countersink, the countersink comprises a small-diameter section and a large-diameter section which are coaxially arranged, and the large-diameter section is positioned in the direction of the small-diameter section close to the air inlet end of the air guide channel;

the second ring sleeve is provided with an inner hole, the second ring sleeve is embedded into the large-diameter section, the periphery of the second ring sleeve is provided with an exhaust notch, and the exhaust notch penetrates through the second ring sleeve in a direction away from the first ring sleeve; the air guide hole is formed by splicing an inner hole of the second annular sleeve and a small-diameter section of the first annular sleeve;

the second ring is sleeved with a sliding frame, the valve core piece comprises a guide rod part connected with the sliding frame in a sliding mode and a valve plug part arranged on the guide rod part, and the reset spring is sleeved on the guide rod part; the inner hole of the second annular sleeve is coaxially arranged with the small-diameter section, the diameter of the inner hole of the second annular sleeve is larger than that of the small-diameter section, and the valve plug part is used for plugging the end part of the small-diameter section to realize sealing.

Through above-mentioned technical scheme, set up structures such as preceding valve portion, back valve portion, first ring cover, second ring cover and sliding frame for the installation of overflow case subassembly is more convenient, also makes follow-up gas overflow influenza valve's maintenance operation more convenient.

Optionally, the valve plug portion is coincident with the axis of the guide rod portion, the outer diameter of the valve plug portion is greater than the diameter of the guide rod portion, and the outer diameter of one end of the valve plug portion, which is close to the small-diameter section, gradually becomes smaller towards the direction close to the small-diameter section.

Through above-mentioned technical scheme, valve plug portion and the coaxial setting of guide arm portion for the slip of case spare is more stable, and the external diameter of valve plug portion diminishes gradually towards the direction external diameter that is close to the path section, and a part of valve plug portion can imbed the path section, and then makes valve plug portion and path section support and block up the effect better.

Optionally, a positioning structure is further provided between the valve plug portion and the small diameter section, and the positioning structure is configured to limit the valve plug portion from being separated from the small diameter section when the valve plug portion is sealed off from the small diameter section.

Through above-mentioned technical scheme, when valve plug portion shutoff and path section, location structure can realize the anticreep effect. When the leakage occurs in the gas pipeline to cause unstable flow velocity in the gas pipeline, and the leakage point is far away from the detection point of the gas sensing control module, when the preset value triggering the transition valve core assembly to be closed is located in the unstable flow velocity interval, the transition valve core assembly is caused to be in continuous transition of on-off state, the flow velocity value enabling the transition valve core assembly to be in the on state from the off state is smaller than the preset value triggering the transition valve core assembly through the positioning structure, the preset value triggering the transition valve core assembly to be closed is located in the unstable flow velocity interval, and the flow velocity value enabling the transition valve core assembly to be in the on state from the off state can be lower than the unstable flow velocity interval, so that the actual use is more stable.

Optionally, the positioning structure includes a first permanent magnet disposed on the valve plug portion and a second permanent magnet disposed on the first ring sleeve, where the second permanent magnet is located at one end of the large-diameter section near the small-diameter section; the second permanent magnet is arranged to be adsorbed on the first permanent magnet when the valve plug part seals the end part of the small-diameter section.

Through the technical scheme, through the adsorption of the permanent magnet I and the permanent magnet II, the flow velocity value of the overcurrent valve core assembly changing from the on state to the off state is smaller than the preset value of the overcurrent valve core assembly, and then the preset value of the overcurrent valve core assembly triggering closure is located in the flow velocity unstable interval, so that the flow velocity value of the overcurrent valve core assembly changing from the off state to the on state can be lower than the flow velocity unstable interval, the overcurrent valve core assembly can be stably in the off state, and overcurrent protection is more stable.

Optionally, the adjusting member is located at a position of the overflow valve core assembly, which is close to the air guide channel and close to the air outlet end, and is an adjusting ball rotatably connected in the valve body, the adjusting ball is penetrated with a through hole, and two ends of the through hole are correspondingly communicated to the air inlet end and the air outlet end of the air guide channel one by one;

the valve plug portion is close to the one end of regulating part is equipped with the guiding portion, the guiding portion is the convergent setting towards the direction of keeping away from valve plug portion, the guiding portion is used for extending to in the through-hole, the guiding portion sets up to by the through-hole inner wall support and guide at the regulating part rotation in-process valve plug portion moves towards the direction of keeping away from the regulating part so that valve plug portion breaks away from with the minor diameter section and supports tightly.

Through the technical scheme, the guide part is arranged, when leakage occurs, the overcurrent valve core component is in the off-state, and when the gas sensing control module controls the driving part to drive the adjusting part to be in the off-state, the adjusting part is rotated, the valve plug part is enabled to move towards the direction away from the adjusting part by abutting against the guide part, the valve plug part and the small-diameter section are further enabled to be separated from the abutting state, the condition that the valve plug part is continuously pressed is reduced, and the service life of the valve plug part is further enabled to be longer.

Optionally, a guiding surface abutting against the guiding part is provided on an inner wall of the through hole near one end of the valve plug part, and the guiding surface is gradually far away from the axis of the through hole in a direction of approaching the valve plug part.

Through above-mentioned technical scheme, set up the guide surface, offset through guide surface and guide part for the guide part is towards keeping away from the removal of regulating part and triggers more conveniently.

Optionally, the regulating part is for rotating the regulating ball of connecting in the valve body, the regulating ball has a through-hole in a link up, the both ends one-to-one intercommunication of through-hole extremely the inlet end and the end of giving vent to anger of air duct, the driving piece is the angle stroke executor, after the angle stroke driver drive regulating ball rotates, the regulating part can make the inlet end of air duct and the end of giving vent to anger be in the state of breaking off.

Through the technical scheme, the adjusting piece is driven to rotate by the angular travel actuator to realize the change of the on-off state, so that the adjusting piece is more convenient to control.

In summary, the present application includes at least one of the following beneficial technical effects:

(1) By arranging the adjusting piece, the driving piece and the gas sensing control module, the valve can be closed timely when the leakage protection is not triggered, so that the condition that the gas is leaked and cannot trigger the gas overcurrent protection to cause continuous leakage of the gas is reduced, and the whole use is safer;

(2) By arranging the structures of the front valve part, the rear valve part, the first annular sleeve, the second annular sleeve, the sliding frame and the like, the installation of the overcurrent valve core assembly is more convenient, and the maintenance operation of the follow-up gas overcurrent valve is more convenient;

(3) Through setting up permanent magnet one and permanent magnet two for the velocity of flow value that the excessive current case subassembly changed to the on state from the outage state is less than the preset value that triggers the excessive current case subassembly, and then triggers the confined preset value of excessive current case subassembly and lie in velocity of flow unstable interval, and the velocity of flow value that realizes the excessive current case subassembly and change to the on state from the outage state can be less than velocity of flow unstable interval for the excessive current case subassembly can be stable be in the outage state, makes the excessive current protection more stable.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment I of an over-flow spool assembly in a conductive state;

FIG. 2 is a schematic cross-sectional view of an embodiment one of the flow-through valve cartridge assembly;

fig. 3 is a schematic structural view of the flow-through valve element assembly according to the first embodiment in an off state;

FIG. 4 is a schematic cross-sectional view of an embodiment II of an over-flow spool assembly in a conductive state;

FIG. 5 is a schematic cross-sectional view of an embodiment II of an excess flow valve cartridge assembly in an open state;

FIG. 6 is a schematic cross-sectional view of the flow-through assembly of the third embodiment in an off-state;

fig. 7 is an enlarged schematic view of the portion a in fig. 6.

Reference numerals: 1. a valve body; 11. a front valve section; 12. a rear valve section; 2. an over-flow spool assembly; 21. a mounting base; 211. a first collar; 212. a second collar; 22. a valve core member; 221. a guide rod portion; 222. a valve plug portion; 23. a return spring; 3. an adjusting member; 31. a through hole; 32. a guide surface; 4. a driving member; 5. an air guide channel; 51. an air inlet end; 52. an air outlet end; 6. a mounting groove; 61. a first groove portion; 62. a second groove portion; 6', a mounting cavity; 7. an abutment surface; 8. a countersunk hole; 81. a small diameter section; 82. a large diameter section; 9. an inner bore; 10. an air guide hole; 13. an exhaust notch; 14. a sliding frame; 15. a limiting ring; 16. a filter screen; 17. a guide rod; 18. a permanent magnet I; 19. a permanent magnet II; 20. a guiding part.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a gas influenza closing valve.

Embodiment one:

a gas flow-through shutoff valve, see fig. 1, comprises a valve body 1, a flow-through valve core assembly 2, an adjusting piece 3 and a driving piece 4. The valve body 1 comprises a front valve part 11 and a rear valve part 12 which are detachably spliced, the front valve part 11 and the rear valve part 12 can be detachably connected in a bolt fixing mode, and particularly, if flanges are fixed on opposite end surfaces of the front valve part 11 and the rear valve part 12, the detachable connection is realized through bolts penetrating through the flanges; the detachable connection may also be achieved by means of a threaded connection, e.g. in this example the front valve part 11 is provided with an external thread at the end near the rear valve part 12, and the end of the rear valve part 12 near the front valve part 11 is provided with an internal thread adapted to achieve a threaded connection with the external thread. The front valve part 11 and the rear valve part 12 are respectively communicated with a channel, after the front valve part 11 and the rear valve part 12 are assembled, the channels of the front valve part 11 and the rear valve part 12 are communicated to form an air guide channel 5, one end of the channel of the front valve part 11, which is far away from the rear valve part 12, is an air inlet end 51, and one end of the channel of the rear valve part 12, which is far away from the front valve part 11, is an air outlet end 52.

The front valve portion 11 is provided with a mounting groove 6 at one end close to the rear valve portion 12, the mounting groove 6 comprises a first groove portion 61 and a second groove portion 62 coaxially located at one end of the first groove portion 61 far away from the rear valve portion 12, and the diameter of the first groove portion 61 is larger than that of the second groove portion 62. The mounting groove 6 communicates with the passage of the front valve portion 11, and an abutment surface 7 is formed between the end of the second groove portion 62 remote from the first groove portion 61 and the inner wall of the passage.

Referring to fig. 1 and 2, the overcurrent spool assembly 2 is located in the air guide passage 5, and the overcurrent spool assembly 2 includes a mount 21, a spool piece 22, and a return spring 23. The mounting seat 21 includes a first ring 211 and a second ring 212, the first ring 211 is coaxially embedded in the first groove 61, and a sealing ring is tightly abutted between the outer peripheral wall of the first ring 211 and the first groove 61 for enhancing sealing. The first ring sleeve 211 is provided with a countersunk hole 8, the countersunk hole 8 and the first ring sleeve 211 are coaxially arranged, the countersunk hole 8 comprises a small-diameter section 81 and a large-diameter section 82 which are coaxially arranged, and the large-diameter section 82 is positioned in the direction that the small-diameter section 81 is close to the air inlet end 51 of the air guide channel 5.

The second ring sleeve 212 is embedded into the large-diameter section 82, the outer peripheral wall of the second ring sleeve 212 abuts against the inner peripheral wall of the large-diameter section 82, and the end, away from the first ring sleeve 211, of the second ring sleeve 212 abuts against the abutting surface 7 to form axial limit. The second ring sleeve 212 is provided with an inner hole 9, the diameter of the inner hole 9 is larger than that of the small-diameter section 81 and smaller than that of the large-diameter section 82, the axis of the inner hole 9 coincides with that of the small-diameter section 81, the inner hole 9 of the second ring sleeve 212 and the small-diameter section 81 of the first ring sleeve 211 are spliced to form an air guide hole 10, one end of the air guide hole 10 is communicated with the air inlet end 51 of the air guide channel 5, the other end of the air guide hole 10 is communicated with the air outlet end 52 of the air guide channel 5, and the air inlet end 51 and the air outlet end 52 of the air guide channel 5 are communicated through the air guide hole 10. The outer periphery of the second ring 212 is provided with a vent notch 13 communicated with the inner hole 9, and the vent notch 13 penetrates through the second ring 212 in a direction away from the first ring 211.

The end of the second ring sleeve 212 far away from the first ring sleeve 211 is also fixed with a sliding frame 14, and the valve core piece 22 is arranged on the sliding frame 14. The valve element 22 includes a guide rod 17 portion 221 and a valve plug portion 222, the guide rod 17 portion 221 is a round rod, the axis of the guide rod 17 portion 221 coincides with the axis of the small diameter section 81, and the guide rod 17 portion 221 is disposed through the sliding frame 14 and slidingly connected to the sliding frame 14 along the axial direction thereof. The valve plug portion 222 is coaxially fixed to the guide rod 17 portion 221, the valve plug portion 222 is located at an end of the sliding frame 14 near the first ring 211, and an outer diameter of the valve plug portion 222 is larger than a diameter of the guide rod 17 portion 221. When the valve plug portion 222 moves toward the first annular sleeve 211 and makes the valve plug portion 222 block the end of the small-diameter section 81, the valve plug portion 222 will close the air-guide hole 10, and the air inlet end 51 and the air outlet end 52 of the air-guide channel 5 will be closed.

In order to make the effect of plugging the small diameter section 81 better, the outer diameter of the end of the valve plug 222 near the small diameter section 81 gradually decreases toward the direction near the small diameter section 81. The outer peripheral wall of the valve plug portion 222 is further provided with a rubber layer, when the valve plug portion 222 is used for plugging the small-diameter section 81, a part of the valve plug portion 222 can be embedded into the small-diameter section 81, and therefore the abutting plugging tightness between the valve plug portion 222 and the small-diameter section 81 is stronger.

The return spring 23 is sleeved on the guide rod 17 part 221 and is positioned at one end of the sliding frame 14 far away from the first ring sleeve 211, the limit ring 15 is also fixed on the guide rod 17 part 221, and the limit ring 15 is positioned at one end of the return spring 23 far away from the sliding frame 14. One end of the return spring 23 abuts against the limiting ring 15 and the other end abuts against the sliding frame 14, and the elastic force of the return spring 23 makes the valve core member 22 have a tendency to be far away from the small-diameter section 81. When the air flow input flow rate in the air guide channel 5 is greater than a preset value, the valve plug part 222 is driven by the air flow to overcome the elastic force of the reset spring 23 to move towards the air guide hole 10 and block the small-diameter section 81 of the air guide hole 10 so that the overflow valve core assembly 2 is in a disconnected state; when the airflow input flow rate in the air guide channel 5 is smaller than the preset value, the valve core member 22 moves towards the direction away from the small-diameter section 81 under the action of the elastic force of the return spring 23, so that the valve plug portion 222 and the small-diameter section 81 are separated from a sealed abutting state, and the overcurrent valve core assembly 2 is in a conducting state.

Referring to fig. 1, the valve body 1 is further provided with a filter screen 16, and the filter screen 16 is installed on the side, close to the air inlet end 51 of the air guide channel 5, of the overflow valve core assembly 2. When the air flow is input, the air flow is filtered through the filter screen 16, so that the condition that particulate impurities strike the overflow valve core assembly 2 in the air flow conveying process is reduced, and the whole use is more stable.

The adjusting piece 3 is an adjusting ball which is rotatably connected in the valve body 1, a mounting chamber is formed in one end of the rear end part, which is close to the front end part, a valve seat is arranged in the mounting chamber, and the adjusting ball is rotatably connected to the valve seat. The adjusting ball is communicated with the through hole 31, two ends of the through hole 31 are correspondingly communicated with the air inlet end 51 and the air outlet end 52 of the air guide channel 5, and the rotation axis of the adjusting ball is perpendicular to the axis of the through hole 31 and passes through the center of the ball. The driving member 4 is an angular travel actuator which is mounted to the valve body 1 and is connected to the adjusting ball. When the angular travel driver drives the adjusting ball to rotate 90 degrees around the rotation axis of the adjusting ball, the adjusting piece 3 can enable the air inlet end 51 and the air outlet end 52 of the air guide channel 5 to be in a disconnection state. When the external gas concentration is reduced, the manual operation is needed to make the adjusting member 3 return to the conducting state.

Referring to fig. 2 and 3, a guide portion 20 is fixed to an end of the valve plug portion 222 near the adjusting member 3, and the guide portion 20 is disposed coaxially with the valve plug portion 222 and tapers away from the valve plug portion 222. When the valve plug portion 222 is in the closed small diameter section 81 and the regulator 3 is in the open state, the guide portion 20 extends into the through hole 31. The inner wall of the through hole 31 near the end of the valve plug portion 222 is provided with a guide surface 32, and the guide surface 32 is gradually far away from the axis of the through hole 31 toward the direction near the valve plug portion 222. When the valve plug portion 222 is positioned at the small-diameter section 81, the guide surface 32 abuts against the guide portion 20 when the adjusting piece 3 is rotated, and the guide portion 20 is guided by the guide surface 32 and the guide portion 20, so that the movement of the guide portion 20 away from the adjusting piece 3 is triggered more conveniently, and the transition from the disconnection state to the communication state of the filter valve element assembly is realized. The guide part 20 realizes that after the overcurrent valve core assembly 2 is triggered to be in a disconnection state, the valve plug part 222 is separated from the abutting relation of the small-diameter section 81 by rotating the adjusting piece 3, so that the time for the valve plug part 222 to continuously extrude with the small-diameter section 81 is reduced, the stress time of the valve plug part 222 is shortened, and the service life of the valve plug part 222 is prolonged.

The gas sensing control module comprises a sensing unit and a control unit, wherein the sensing unit is a gas-sensitive resistor, when the concentration of outside gas is increased, the resistance value of a gas-sensitive semiconductor is reduced, the current is increased, and when the control unit judges that the current is increased, the control driving part 4 is controlled to operate so that the regulating part 3 is in a state that the gas guide channel 5 is disconnected.

Alternatively, the gas sensing control module comprises a sensing unit and a control unit, wherein the sensing unit is used for detecting the external gas concentration every preset time and transmitting the concentration value to the control unit, for example, every 5 seconds. The control unit controls the driving member 4 to operate by comparing the density values when the received density value is higher than the last received density value and the difference between them exceeds the error threshold. For example, when the concentration of the external gas increases, the concentration value received at present is higher than the concentration value received last time, and the difference exceeds the error threshold, at this time, the control unit controls the driving member 4 to operate so that the adjusting member 3 is in a state of making the gas guide channel 5 open.

When in actual use, the power supply of the driving piece 4 can adopt a storage battery, the storage battery can be additionally provided with an electric quantity monitoring module, and when the electric quantity is insufficient, the electric quantity monitoring module is triggered to generate beeping sounds.

The working principle of the embodiment is as follows:

in practical use, the gas system generally supplies combustible gases such as methane and carbon monoxide. When the air flow input flow rate in the air guide channel 5 is greater than a preset value, the valve plug part 222 is driven by the air flow to move towards the air guide hole 10 against the elastic force of the return spring 23 and block the small diameter section 81 of the air guide hole 10, so that the overcurrent valve core assembly 2 is in an on-off state, and overcurrent protection is formed. In addition, when the gas leakage occurs, the gas sensing control module detects that the outside gas concentration rises and then controls the driving part 4 to drive the adjusting part 3 to be adjusted to be in a state of breaking the gas inlet end 51 and the gas outlet end 52 of the gas guide channel 5, so that the valve can be closed timely when the leakage protection is not triggered, and further the condition that the gas leakage cannot trigger the gas over-current protection to cause the gas to continuously leak is reduced, and the whole use is safer.

Embodiment two:

the gas flow-through shut-off valve, see fig. 4 and 5, differs from the first embodiment in that there is no guide 20 and no guide surface 32, and in addition, the structure of the flow-through valve element assembly 2, the regulator 3 and the driver 4 is different. The air guide channel 5 is internally provided with an installation cavity 6', the overcurrent valve core assembly 2 comprises a valve core piece 22, a reset spring 23 and an installation seat 21 which are arranged in the installation cavity 6', the installation seat 21 is installed in the installation cavity 6', the installation seat 21 is provided with an air guide hole 10, and the air inlet end 51 and the air outlet end 52 of the air guide channel 5 are communicated through the air guide hole 10.

The valve core piece 22 is positioned at one end of the mounting seat 21 far away from the air outlet end 52 of the air guide channel 5, the valve core piece 22 is a sealing plate, the sealing plate is glidingly connected with the mounting seat 21, a specific glide structure is that a guide rod 17 is fixed in the mounting seat 21, and the guide rod 17 glidingly penetrates through the sealing plate to guide the glide of the sealing plate. The return spring 23 is connected between the sealing plate and the mounting seat 21, and the elastic force of the return spring 23 makes the sealing plate have a tendency to be far away from the mounting seat 21.

When the air flow input flow rate in the air guide channel 5 is greater than a preset value, the sealing plate is driven by the air flow to overcome the elastic force of the reset spring 23 to move towards the air guide hole 10 and block the air guide hole 10, so that the overflow valve core assembly 2 is in a disconnected state. When the air flow input flow rate in the air guide channel 5 is smaller than a preset value, the elastic force of the reset spring 23 pushes the sealing plate to be away from the mounting seat 21, so that the air guide channel 5 is in a conducting state.

The regulating part 3 is a valve plate which is connected to the valve body 1 in a sliding manner, the valve plate slides along the direction perpendicular to the air guide channel 5, the valve plate is made of ferromagnetic materials, the valve plate is provided with a through hole 31, the through hole 31 is used for communicating an air inlet end 51 and an air outlet end 52 of the air guide channel 5, and the change of the on-off state of the air guide channel 5 is realized through the movement of the valve plate. A spring is arranged in the valve body 1, and the elastic force of the spring enables the valve plate to be opened and the air guide channel 5 to be in a conducting state. The driving piece 4 is an electromagnet, when the electromagnet is not electrified, the valve plate is in an open state under the action of the spring, the air guide channel 5 is in a conducting state at the moment, when the electromagnet is electrified, the valve plate is adsorbed to enable the valve plate to overcome the elastic force of the spring to move to a closed state, and the air guide channel 5 is in a disconnected state at the moment.

When the gas induction control module detects that the concentration of the outside gas rises, the control piece controls the electromagnet to be electrified, and the electromagnet adsorbs the valve plate to enable the valve plate to be adjusted to be in a closed state.

Embodiment III:

a gas flow-through shut-off valve, see fig. 6 and 7, differs from the first embodiment in that a positioning structure is further provided, which is located between the valve plug portion 222 and the small diameter section 81. When the valve plug portion 222 is plugged in the small-diameter section 81, the engagement of the positioning structure limits the valve plug portion 222 to be separated from the small-diameter section 81, so that the plugging is more stable.

The positioning structure comprises a first permanent magnet 18 and a second permanent magnet 19, wherein the first permanent magnet 18 is annular, and the first permanent magnet 18 and the valve plug part 222 are coaxially arranged and fixed on the valve plug part 222. The second permanent magnet 19 is disposed on the first ring sleeve 211 and is located at one end of the large diameter section 82 near the small diameter section 81. For convenient installation, the second permanent magnet 19 is in a ring shape, the second permanent magnet 19 is positioned in the large-diameter section 82 and is coaxially arranged with the large-diameter section 82, the inner diameter of the second permanent magnet 19 is larger than that of the small-diameter section 81, and the second ring sleeve 212 axially compresses the second permanent magnet 19 in the first ring sleeve 211. When the valve plug 222 is plugged in the small-diameter section 81, the opposite end surfaces of the second permanent magnet 19 and the first permanent magnet 18 are abutted against each other and form adsorption.

When the gas pipeline leaks to cause unstable flow velocity in the gas pipeline, and the leakage point is far away from the detection point of the gas sensing control module, the gas sensing control module cannot trigger the driving piece 4 to operate at the moment.

When the preset value triggering the closing of the overcurrent valve core assembly 2 is located in the unstable flow speed interval, the overcurrent valve core assembly 2 is caused to be in continuous conversion between on-off states, the adsorption of the permanent magnet I18 and the permanent magnet II 19 enables the flow speed value of the overcurrent valve core assembly 2 converted from the on-off state to the on-state to be smaller than the preset value triggering the overcurrent valve core assembly 2, and then the preset value triggering the closing of the overcurrent valve core assembly 2 is located in the unstable flow speed interval, and the flow speed value of the overcurrent valve core assembly 2 converted from the on-off state to the on-state can be lower than the unstable flow speed interval, so that the overcurrent valve core assembly 2 can be stably in the on-off state, and the overcurrent protection is more stable. By matching the guide part 20 and the guide surface 32 and rotating the adjusting part 3, the valve plug part 222 moves in a direction away from the adjusting part 3 by abutting the guide surface 32 of the adjusting part 3 against the guide part 20, so that the permanent magnet I18 and the permanent magnet II 19 are separated from adsorption, and further manual reset is realized, and the overcurrent valve core assembly 2 is adjusted to be in a conducting state.

In practice, the replaceable positioning structure may also be that an elastic limiting protrusion is fixed on the peripheral wall of the valve plug portion 222, where the elastic limiting protrusion is made of rubber. The inner wall of the small-diameter section 81 is provided with a limit groove for embedding the elastic limit protrusion. The cross section of the elastic limit protrusion becomes gradually smaller in a direction away from the axis of the valve plug portion 22 for guiding the insertion of the limit groove. When the valve plug part 222 is plugged in the small-diameter section 81, the limiting protrusion is embedded into the limiting groove to realize positioning.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a gas overflows influenza shut-off valve, includes valve body (1), be equipped with air guide channel (5) in valve body (1), be equipped with in valve body (1) and be used for right air guide channel (5) carry out overcurrent protection's overflow case subassembly (2), its characterized in that: the overcurrent valve core assembly (2) comprises a mounting seat (21), a valve core piece (22) and a reset spring (23), wherein the mounting seat (21) is positioned in the air guide channel (5), the mounting seat (21) is provided with an air guide hole (10), and an air inlet end (51) and an air outlet end (52) of the air guide channel (5) are communicated through the air guide hole (10); the valve core piece (22) slides relative to the mounting seat (21), the return spring (23) is arranged in the air guide channel (5), and the elastic force of the return spring (23) enables the valve core piece (22) to have a trend of being far away from the air guide hole (10);

when the air flow input flow rate in the air guide channel (5) is greater than a preset value, the valve core piece (22) is driven by air flow to move towards the air guide hole (10) against the elastic force of the reset spring (23) and block the air guide hole (10) so that the overcurrent valve core assembly (2) is in an off state;

the valve body (1) comprises a front valve part (11) and a rear valve part (12) which are detachably spliced, the front valve part (11) and the rear valve part (12) are respectively provided with a channel, and the channels of the front valve part (11) and the rear valve part (12) are communicated to form the air guide channel (5); one end of the front valve part (11) close to the rear valve part (12) is provided with a mounting groove (6), and the mounting groove (6) is communicated with a channel of the front valve part (11);

the mounting seat (21) comprises a first ring sleeve (211) and a second ring sleeve (212), the first ring sleeve (211) is embedded in the mounting groove (6), the first ring sleeve (211) is provided with a countersunk hole (8), the countersunk hole (8) comprises a small-diameter section (81) and a large-diameter section (82) which are coaxially arranged, and the large-diameter section (82) is positioned in the direction of the small-diameter section (81) close to the air inlet end (51) of the air guide channel (5);

the second ring sleeve (212) is provided with an inner hole (9), the second ring sleeve (212) is embedded into the large-diameter section (82), an exhaust notch (13) is arranged at the periphery of the second ring sleeve (212), and the exhaust notch (13) penetrates through the second ring sleeve (212) in a direction away from the first ring sleeve (211); the air guide hole (10) is formed by splicing an inner hole (9) of the second annular sleeve (212) and a small-diameter section (81) of the first annular sleeve (211);

the second ring sleeve (212) is provided with a sliding frame (14), the valve core piece (22) comprises a guide rod (17) part (221) connected to the sliding frame (14) in a sliding manner and a valve plug part (222) arranged on the guide rod (17) part (221), and the return spring (23) is sleeved on the guide rod (17) part (221); the inner hole (9) of the second annular sleeve (212) is coaxially arranged with the small-diameter section (81), the diameter of the inner hole (9) of the second annular sleeve (212) is larger than that of the small-diameter section (81), and the valve plug part (222) is used for plugging the end part of the small-diameter section (81) to realize sealing;

a positioning structure is further arranged between the valve plug part (222) and the small-diameter section (81), and the positioning structure is used for limiting the valve plug part (222) to be separated from the small-diameter section (81) when the valve plug part (222) seals the small-diameter section (81);

an adjusting piece (3) is further arranged in the valve body (1), and the valve body (1) is provided with a driving piece (4) connected with the adjusting piece (3) and further comprises a gas sensing control module;

the gas sensing control module comprises a sensing unit and a control unit, wherein the sensing unit is a gas sensitive resistor, and when the control unit detects that the concentration of the external gas rises, the control unit controls the driving part (4) to operate so that the adjusting part (3) is adjusted to be in a state of breaking the gas inlet end (51) and the gas outlet end (52) of the gas guide channel (5);

or, the gas sensing control module comprises a sensing unit and a control unit, the sensing unit is used for detecting the external gas concentration every preset time and transmitting the concentration value to the control unit, the control unit compares the concentration value, when the received concentration value is higher than the last received concentration value and the difference value between the received concentration value and the last received concentration value exceeds an error threshold value, the control unit controls the driving piece (4) to operate so that the adjusting piece (3) is adjusted to a state that the gas inlet end (51) and the gas outlet end (52) of the gas guide channel (5) are disconnected.

2. The gas over-flow shutoff valve of claim 1, wherein: the valve body (1) is further provided with a filter screen (16), and the filter screen (16) is positioned on one side of the overcurrent valve core assembly (2) close to the air inlet end (51) of the air guide channel (5).

3. The gas over-flow shutoff valve of claim 1, wherein: the valve plug part (222) is overlapped with the axis of the guide rod (17) part (221), the outer diameter of the valve plug part (222) is larger than the diameter of the guide rod (17) part (221), and the outer diameter of one end, close to the small-diameter section (81), of the valve plug part (222) gradually becomes smaller towards the direction, close to the small-diameter section (81).

4. The gas over-flow shutoff valve of claim 1, wherein: the positioning structure comprises a first permanent magnet (18) arranged on the valve plug part (222) and a second permanent magnet (19) arranged on the first annular sleeve (211), and the second permanent magnet (19) is positioned at one end, close to the small-diameter section (81), of the large-diameter section (82); the second permanent magnet (19) is arranged to be adsorbed to the first permanent magnet (18) when the valve plug part (222) seals the end of the small-diameter section (81).

5. The gas over-flow shutoff valve of claim 4 wherein: the regulating piece (3) is positioned at a position, close to the air guide channel (5), of the overcurrent valve core assembly (2) and close to the air outlet end (52), the regulating piece (3) is a regulating ball which is rotationally connected in the valve body (1), the regulating ball is penetrated with a through hole (31), and two ends of the through hole (31) are correspondingly communicated to the air inlet end (51) and the air outlet end (52) of the air guide channel (5) one by one;

the one end that valve plug portion (222) is close to regulating part (3) is equipped with guiding portion (20), guiding portion (20) are the tapering setting towards the direction of keeping away from valve plug portion (222), guiding portion (20) are used for extending to in through-hole (31), guiding portion (20) set up to by through-hole (31) inner wall support and guide at regulating part (3) rotation in-process valve plug portion (222) are moved towards the direction of keeping away from regulating part (3) and are made valve plug portion (222) break away from with minor diameter section (81) and support tightly.

6. The gas over-flow shutoff valve of claim 5, wherein: the inner wall of the through hole (31) near one end of the valve plug part (222) is provided with a guide surface (32) propped against the guide part (20), and the guide surface (32) is gradually far away from the axis of the through hole (31) towards the direction near the valve plug part (222).

7. The gas over-flow shutoff valve of claim 1, wherein: the regulating piece (3) is rotationally connected to the regulating ball in the valve body (1), the regulating ball is communicated with a through hole (31), two ends of the through hole (31) are communicated to an air inlet end (51) and an air outlet end (52) of the air guide channel (5) in one-to-one correspondence, the driving piece (4) is an angular travel actuator, and after the angular travel actuator drives the regulating ball to rotate, the regulating piece (3) can enable the air inlet end (51) and the air outlet end (52) of the air guide channel (5) to be in an off-state.