Gas self-closing valve

Abstract

A gas self-closing valve comprises a valve body, a sliding sleeve, a cover plate and a reset member. The valve body is provided with a valve cavity, an inlet and an outlet arranged on both sides of the valve cavity, and a spiral sliding groove on the inner wall of the valve cavity. The sliding sleeve is assembled in the valve cavity, and the side of the sliding sleeve facing the inlet is provided with a trumpet-shaped skin film, and the skin film is provided with a first through hole for the flow of gas to the sliding sleeve. The other side of the sliding sleeve has a sleeve wall, and the sleeve wall is uniformly distributed with first through grooves. The cover plate is assembled on the side of the sliding sleeve with the sleeve wall, and the cover plate is uniformly distributed with second through grooves, and the side of the cover plate is provided with a sliding column matched with the sliding groove. The reset member comprises an axially movable reset rod, and the reset rod extends into the valve cavity. The sliding sleeve is provided with a first reset groove in the form of a key, and the first reset groove is provided with first inclined surfaces on both sides, and the reset rod is provided with a first reset portion corresponding to the first inclined surfaces. The overall volume of the application is small, and whether it is overpressure or underpressure that causes the self-closing valve to close, the same reset member is used to reset, and the reset operation is simple.

Description

Technical Field

[0001] This invention belongs to the field of gas self-closing valve technology, and specifically relates to a gas self-closing valve. Background Technology

[0002] In existing technologies, gas self-closing valves, as key devices ensuring safe gas use, are designed and functioned with safety and reliability in mind. However, currently available gas self-closing valves still have the following technical limitations:

[0003] 1. Traditional gas self-closing valves generally adopt a butterfly structure design, resulting in a relatively large overall valve size. In practical applications, this large size design places high demands on the installation environment, especially in scenarios with compact household gas pipeline layouts and limited space (such as near wall-mounted gas water heaters or inside cabinets). The installation and maintenance of valves often face space constraints and may even require additional modifications to the pipeline structure to accommodate the valve size, increasing installation costs and construction complexity.

[0004] 2. Existing gas self-closing valves typically require different operating procedures for their reset mechanisms when dealing with different operating conditions. For example, in an overpressure state, the valve may be reset by spring return or manual knob rotation; while in an underpressure state, it may require pressing a specific component or waiting for the pressure to recover naturally before the valve can be restarted. This scenario-specific reset design requires users to memorize different operating procedures. For ordinary users, misoperation due to unfamiliarity with the operating procedures (such as incorrect reset sequence or improper force control) may cause the valve to fail to restart normally, or even lead to secondary malfunctions. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0006] A gas self-closing valve includes a valve body, a sliding sleeve, a cover plate, and a reset element. The valve body has a valve cavity and an inlet and outlet located on opposite sides of the cavity; the inner wall of the valve cavity has a spiral groove. The sliding sleeve is fitted inside the valve cavity, with a trumpet-shaped diaphragm mounted on the inlet-facing side. A first through-hole for gas to flow into the sliding sleeve is located in the center of the diaphragm. The other side of the sliding sleeve has a sleeve wall with evenly distributed first through grooves. The cover plate is fitted onto the sleeve side with the sleeve wall, and a second through groove is evenly distributed on the cover plate. A sliding post that matches the groove is located on the side of the cover plate.

[0007] The reset component includes an axially movable reset rod that extends into the valve cavity; a key-shaped first reset groove is provided on the sliding sleeve, and first inclined surfaces are provided on both sides of the first reset groove; a first reset part corresponding to the first inclined surface is provided on the reset rod; when the air pressure in the pipeline is equal to the set pressure, the reset rod is located in the middle of the first reset groove; when the air pressure in the pipeline is greater than or less than the set pressure, the first reset part abuts against the corresponding first inclined surface.

[0008] When the gas pressure inside the pipeline equals the set pressure, the second channel corresponds to the first channel, and the gas self-closing valve opens; when the gas pressure inside the pipeline is less than the set pressure, the diaphragm is pressed, causing the sliding sleeve to move axially towards the inlet, the cover plate rotates, the second channel and the first channel are misaligned, and the gas self-closing valve automatically closes; when the gas pressure inside the pipeline is greater than the set pressure, the diaphragm is pressed, causing the sliding sleeve to move axially towards the outlet, the cover plate rotates, the second channel and the first channel are misaligned, and the gas self-closing valve automatically closes.

[0009] Furthermore, the valve body is provided with a mounting groove for mounting a reset rod, and the reset component also includes a first spring. The reset rod is provided with a blocking part, and the first spring is assembled between the blocking part and the bottom of the mounting groove. The valve body is also equipped with a mounting joint for sealing the mounting groove, and the end of the reset rod passes through the mounting joint and is provided with a pressing head.

[0010] Furthermore, a current sensing element is installed inside the sliding sleeve. The current sensing element includes an assembly rod, one end of which passes through the sleeve wall. A cover plate is slidably mounted on the assembly rod. A sensing plate is fixedly mounted on the assembly rod. A third through groove is evenly distributed on the sensing plate. The third through groove is staggered from the first through groove.

[0011] Furthermore, a sleeve is fitted inside the sliding sleeve, a diaphragm is fitted on one side of the sleeve, and the other side of the sleeve has a cylindrical wall with second through holes evenly distributed on the cylindrical wall for gas flow; a second reset groove is provided on the sleeve corresponding to the first reset groove. A reset block is fitted at the other end of the mounting rod, the reset block is located inside the sleeve, and a second spring is fitted between the reset block and the cylindrical wall of the sleeve; a second inclined surface is provided on the reset block, and a second reset part is provided at the end of the reset rod for engaging with the second inclined surface.

[0012] Furthermore, the membrane is fixedly connected to the sleeve by a fastening assembly; the fastening assembly includes a fixing seat and a fixing ring, the fixing seat has a fixing groove in the middle, the membrane has a gathering opening, and the fixing ring cooperates with the fixing groove to fix the gathering opening.

[0013] Furthermore, the spring force parameter of the second spring is set as follows: when the gas flow rate is ≥1.2m³ / h, the pressure of the gas flow acting on the sensing plate is greater than the reverse spring force of the second spring, and the sensing plate moves axially until the sensing plate abuts against the sleeve wall.

[0014] Furthermore, three sets of positioning grooves are provided along the axial direction on the inner wall of the valve cavity, and a positioning ring is assembled on the outer side of the sliding sleeve; when the positioning ring is located in the middle positioning groove, the gas self-closing valve is in the open state.

[0015] Furthermore, the valve body includes an intermediate structural component and interface structural components located on both sides, and the interface structural components and the intermediate structural component are connected by threads; the edge of the diaphragm is assembled and fixed by the intermediate structural component and the interface structural component located at the inlet.

[0016] Compared with the prior art, this application has the following beneficial technical effects:

[0017] 1. The core structure has been innovatively and optimized, which greatly reduces the overall size of the gas self-closing valve, making it suitable for scenarios with limited installation space.

[0018] 2. Regardless of whether it is overvoltage, undervoltage, or overcurrent, the same reset component is used for resetting, and the reset operation can be completed simply by pressing the reset component, making the reset operation simple.

[0019] 3. The valve body is assembled using threads, without screws, making disassembly and assembly simple. Attached Figure Description

[0020] Figure 1 This is a 3D view of a gas self-closing valve.

[0021] Figure 2 This is a cross-sectional view of a gas self-closing valve.

[0022] Figure 3 This is an exploded view of a gas self-closing valve.

[0023] Figure 4 This is a cross-sectional view of the sliding sleeve and the reset rod.

[0024] Figure 5 This is a three-dimensional sectional view of the intermediate structural component.

[0025] Figure 6 This is a three-dimensional view of the sleeve.

[0026] Figure 7 This is a 3D diagram of Hua Tao.

[0027] Figure 8 This is a three-dimensional view of the cover plate.

[0028] Figure 9 This is a three-dimensional view of the overcurrent sensor.

[0029] Figure 10 This is a 3D view of the reset lever.

[0030] The following is an explanation of the reference numerals in the attached figures:

[0031] 100. Valve body; 101. Valve cavity; 102. Slide groove; 103. Inlet; 104. Outlet; 105. Positioning groove; 106. Mounting groove; 110. Intermediate structural component; 120. Interface structural component;

[0032] 200. Sliding sleeve; 201. Sleeve wall; 202. First through groove; 203. First reset groove; 204. First inclined surface; 210. Diaphragm; 211. First through hole; 212. Converging port; 220. Overcurrent sensor; 221. Assembly rod; 222. Sensing plate; 223. Third through groove; 224. Reset block; 225. Second inclined surface; 226. Second spring; 230. Sleeve; 231. Sleeve wall; 232. Second through hole; 233. Second reset groove; 240. Fastening assembly; 241. Fixing seat; 242. Fixing ring; 250. Positioning ring;

[0033] 300. Cover plate; 301. Second through groove; 302. Sliding column;

[0034] 400. Reset component; 410. Reset rod; 411. First reset part; 412. Second reset part; 413. Blocking part; 420. First spring; 430. Mounting connector; 440. Pressing head. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] In the following embodiments, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the description of this invention; therefore, they should not be construed as limiting this invention. Furthermore, terms such as first, second, etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this invention, unless otherwise expressly specified and limited, terms such as installation, connection, linking, etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Reference Figures 1 to 10A gas self-closing valve includes a valve body 100, a sliding sleeve 200, a cover plate 300, and a reset member 400. The valve body 100 has a valve cavity 101 and an inlet 103 and an outlet 104 respectively located on both sides of the valve cavity 101; the inner wall of the valve cavity 101 has a spiral groove 102. The sliding sleeve 200 is assembled inside the valve cavity 101. A trumpet-shaped diaphragm 210 is assembled on the side of the sliding sleeve facing the inlet 103, and a first through hole 211 for gas to flow into the sliding sleeve 200 is provided in the middle of the diaphragm 210; the other side of the sliding sleeve 200 has a sleeve wall 201, on which first through grooves 202 are evenly distributed. The cover plate 300 is assembled on the side of the sliding sleeve 200 with the sleeve wall 201, and a second through groove 301 is evenly distributed on the cover plate 300. A sliding post 302 that matches the sliding groove 102 is provided on the side of the cover plate 300. The design of the spiral groove 102 and the sliding column 302 enables the sliding sleeve 200 to drive the cover plate 300 to rotate synchronously when it moves axially, ensuring that the second through groove 301 on the cover plate 300 is precisely misaligned or aligned with the first through groove 202 of the sliding sleeve 200, thereby realizing the rapid opening and closing control of the valve.

[0039] When the gas pressure in the pipeline equals the set pressure, the second channel 301 corresponds to the first channel 202, and the gas self-closing valve opens normally. When the gas pressure in the pipeline is less than the set pressure (underpressure state), the diaphragm 210 is pressed, causing the sliding sleeve 200 to move axially towards the inlet 103, the cover plate 300 rotates, the second channel 301 and the first channel 202 are misaligned, and the gas self-closing valve closes automatically. When the gas pressure in the pipeline is greater than the set pressure (overpressure state), the diaphragm 210 is pressed, causing the sliding sleeve 200 to move axially towards the outlet 104, the cover plate 300 rotates, the second channel 301 and the first channel 202 are misaligned, and the gas self-closing valve closes automatically. To achieve stable positioning and prevent excessive rotation of the cover plate 300, three sets of positioning grooves 105 are provided along the axial direction on the inner wall of the valve cavity 101, and a positioning ring 250 is assembled on the outer side of the sliding sleeve 200; when the positioning ring 250 is located in the middle positioning groove 105, the gas self-closing valve is in the open state, and the positioning grooves 105 on both sides correspond to the overpressure and underpressure states, respectively.

[0040] Furthermore, the reset component 400 includes an axially movable reset rod 410 that extends into the valve cavity 101. The sliding sleeve 200 is provided with a key-shaped first reset groove 203, with first inclined surfaces 204 on both sides of the first reset groove 203. The reset rod 410 is provided with a first reset portion 411 corresponding to the first inclined surface 204. When the air pressure inside the pipeline equals the set pressure, the reset rod 410 is located in the middle of the first reset groove 203. When the air pressure inside the pipeline is greater than or less than the set pressure (overpressure or underpressure), the first reset portion 411 abuts against the corresponding first inclined surface 204. In overpressure and underpressure states, pressing the reset rod 410 converts the radial displacement of the reset rod 410 along the sliding sleeve 200 into axial displacement of the sliding sleeve 200, thereby achieving reset. This design allows the user to reset the sliding sleeve 200 simply by pressing the reset rod 410, regardless of whether there is overpressure or underpressure, making the reset operation simple.

[0041] To facilitate reset, the valve body 100 is provided with a mounting groove 106 for mounting the reset rod 410. The reset component 400 also includes a first spring 420. The reset rod 410 has a blocking part 413, and the first spring 420 is assembled between the blocking part 413 and the bottom of the mounting groove 106. The first spring 420 provides elastic restoring force to the reset rod 410, ensuring that the reset rod 410 can automatically reset after being pressed. The valve body 100 is also equipped with a mounting connector 430 for sealing the mounting groove 106. The end of the reset rod 410 passes through the mounting connector 430 and is provided with a pressing head 440. This design facilitates the manufacture and maintenance of the valve body 100.

[0042] Furthermore, an overcurrent sensor 220 is installed inside the sliding sleeve 200. The overcurrent sensor 220 includes an assembly rod 221, one end of which passes through the sleeve wall 201. A cover plate 300 is slidably mounted on the assembly rod 221. A sensing plate 222 is fixedly mounted on the assembly rod 221. A third through groove 223 is evenly distributed on the sensing plate 222, and the third through groove 223 is staggered from the first through groove 202. When the gas flow exceeds the safety threshold, the airflow impacts the sensing plate 222, pushing it axially until it abuts against the sleeve wall 201. Since the third through groove 223 is completely staggered from the first through groove 202, the gas flow path is completely cut off. This design achieves rapid response and automatic shut-off for overcurrent, preventing dangers caused by gas leakage or equipment failure.

[0043] The sleeve 200 is fitted with a sleeve 230, and a diaphragm 210 is fitted on one side of the sleeve 230. The other side of the sleeve 230 has a cylindrical wall 231, on which second through holes 232 for gas flow are evenly distributed. A second reset groove 233 is provided on the sleeve 230 corresponding to the first reset groove 203. A reset block 224 is fitted at the other end of the mounting rod 221. The reset block 224 is located inside the sleeve 230. A second spring 226 is fitted between the reset block 224 and the cylindrical wall 231 of the sleeve 230. The elastic force parameter of the second spring 226 is set such that when the gas flow rate is ≥1.2m³ / h, the pressure of the gas flow acting on the sensing plate 222 is greater than the reverse elastic force of the second spring 226, and the sensing plate 222 moves axially until the sensing plate 222 abuts against the sleeve wall 201. The reset block 224 is provided with a second inclined surface 225, and the end of the reset rod 410 is provided with a second reset part 412 for engaging with the second inclined surface 225. When the gas self-closing valve is repaired from the overcurrent state, the user presses the reset piece 400, and the second reset part 412 presses on the second inclined surface 225 of the reset block 224. The radial displacement of the reset rod 410 along the sliding sleeve 200 is converted into the axial displacement of the shaft, thereby achieving reset. When the gas self-closing valve is closed due to an overcurrent problem, the user only needs to press the reset rod 410 to reset the overcurrent sensing element 220, making the reset operation simple.

[0044] For ease of assembly and disassembly, the valve body 100 includes a central structural component 110 and interface structural components 120 located on both sides. The interface structural components 120 and the central structural component 110 are connected by threads. The edge of the diaphragm 210 is assembled and fixed by the central structural component 110 and the interface structural component 120 located at the inlet 103. The diaphragm 210 is fixedly connected to the sleeve 230 by a fastening assembly 240. The fastening assembly 240 includes a fixing seat 241 and a fixing ring 242. The fixing seat 241 has a fixing groove in the middle, and the diaphragm 210 has a constriction opening 212. The fixing ring 242 cooperates with the fixing groove to fix the constriction opening 212. This design allows the valve body 100 to be assembled without the use of screws, making assembly and disassembly convenient.

[0045] The scope of protection of this invention includes, but is not limited to, the above embodiments. The scope of protection of this invention is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art fall within the scope of protection of this invention.

Claims

1. A gas self-closing valve, characterized by, include: The valve body (100) has a valve cavity (101) inside and an inlet (103) and an outlet (104) on both sides of the valve cavity (101); the inner wall of the valve cavity (101) is provided with a spiral groove (102). A sliding sleeve (200) is installed inside the valve cavity (101). A trumpet-shaped diaphragm (210) is installed on the side of the sliding sleeve (200) facing the inlet (103). A first through hole (211) for gas to flow into the sliding sleeve (200) is provided in the middle of the diaphragm (210). The other side of the sliding sleeve (200) has a sleeve wall (201). A first through groove (202) is evenly distributed on the sleeve wall (201). A cover plate (300) is fitted on one side of the sliding sleeve (200) with a sleeve wall (201). The cover plate (300) has a second through groove (301) evenly distributed on it. The side of the cover plate (300) is provided with a sliding post (302) that matches the sliding groove (102). The reset component (400) includes an axially movable reset rod (410) that extends into the valve chamber (101); a key-shaped first reset groove (203) is provided on the sliding sleeve (200), and first inclined surfaces (204) are provided on both sides of the first reset groove (203); a first reset part (411) corresponding to the first inclined surface (204) is provided on the reset rod (410); when the air pressure in the pipeline is equal to the set pressure, the reset rod (410) is located in the middle of the first reset groove (203); when the air pressure in the pipeline is greater than or less than the set pressure, the first reset part (411) abuts against the corresponding first inclined surface (204); When the gas pressure in the pipeline is equal to the set pressure, the second channel (301) corresponds to the first channel (202), and the gas self-closing valve opens; when the gas pressure in the pipeline is less than the set pressure, the diaphragm (210) is pressed and drives the sliding sleeve (200) to move axially towards the inlet (103), the cover plate (300) rotates, the second channel (301) and the first channel (202) are misaligned, and the gas self-closing valve closes automatically; when the gas pressure in the pipeline is greater than the set pressure, the diaphragm (210) is pressed and drives the sliding sleeve (200) to move axially towards the outlet (104), the cover plate (300) rotates, the second channel (301) and the first channel (202) are misaligned, and the gas self-closing valve closes automatically.

2. A gas self-closing valve according to claim 1, characterised in that The valve body (100) is provided with a mounting groove (106) for mounting a reset rod (410). The reset component (400) also includes a first spring (420). The reset rod (410) is provided with a blocking part (413). The first spring (420) is assembled between the blocking part (413) and the bottom of the mounting groove (106). The valve body (100) is also equipped with a mounting joint (430) for sealing the mounting groove (106). The end of the reset rod (410) passes through the mounting joint (430) and is provided with a pressing head (440).

3. A gas self-closing valve according to claim 1, wherein The sliding sleeve (200) is equipped with an overcurrent sensor (220), which includes an assembly rod (221). One end of the assembly rod (221) passes through the sleeve wall (201), and the cover plate (300) is slidably mounted on the assembly rod (221). A sensing plate (222) is fixedly mounted on the assembly rod (221), and a third through groove (223) is evenly distributed on the sensing plate (222). The third through groove (223) and the first through groove (202) are staggered.

4. A gas self-closing valve according to claim 3, characterised in that The sleeve (200) is fitted with a sleeve (230), and the diaphragm (210) is fitted on one side of the sleeve (230). The other side of the sleeve (230) has a cylinder wall (231), and the cylinder wall (231) has evenly distributed second through holes (232) for gas flow. The sleeve (230) is provided with a second reset groove (233) corresponding to the first reset groove (203). The other end of the assembly rod (221) is equipped with a reset block (224), the reset block (224) is located inside the sleeve (230), and a second spring (226) is assembled between the reset block (224) and the sleeve wall (231) of the sleeve (230); a second ramp surface (225) is provided on the reset block (224), and the end of the reset rod (410) is provided with a second reset part (412) for cooperating with the second ramp surface (225).

5. A gas self-closing valve according to claim 4, characterised in that The membrane (210) is fixedly connected to the sleeve (230) by a fastening assembly (240); the fastening assembly (240) includes a fixing seat (241) and a fixing ring (242). The fixing seat (241) has a fixing groove in the middle, and the membrane (210) has a gathering opening (212). The fixing ring (242) cooperates with the fixing groove to fix the gathering opening (212).

6. A gas self-closing valve according to claim 4, wherein The elastic force parameter of the second spring (226) is set as follows: when the gas flow rate is ≥1.2m³ / h, the pressure of the gas flow acting on the sensing plate (222) is greater than the reverse elastic force of the second spring (226), and the sensing plate (222) moves axially until the sensing plate (222) abuts against the sleeve wall (201).

7. The gas self-closing valve according to claim 1, wherein Three sets of positioning grooves (105) are provided on the inner wall of the valve cavity (101) along the axial direction, and a positioning ring (250) is assembled on the outer side of the sliding sleeve (200); when the positioning ring (250) is located in the middle positioning groove (105), the gas self-closing valve is in the open state.

8. The gas self-closing valve according to claim 1, wherein The valve body (100) includes an intermediate structural component (110) and interface structural components (120) located on both sides. The interface structural components (120) and the intermediate structural component (110) are connected by threads. The edge of the diaphragm (210) is assembled and fixed by the intermediate structural component (110) and the interface structural component (120) located at the inlet (103).

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