An adaptive gas self-closing valve

Abstract

The application belongs to the technical field of gas equipment, and particularly relates to a self-adaptive gas self-closing valve, which comprises a valve body, a valve core, an elastic member and a diaphragm. The application is composed of airtight first valve cavity and second valve cavity through the cooperation of valve seat, diaphragm and valve core. The vertical position of the valve core is controlled through the diaphragm and the elastic member, and then the opening or closing of the communication port is controlled. When the gas pressure is not in the preset range, if the pressure is too low, the diaphragm will drive the first sealing part of the valve core to close the communication port to realize the self-closing of the self-closing valve; if the pressure is relatively high, the elastic force of the elastic member and the diaphragm is balanced with the gas pressure to make the self-closing valve open the communication; if the pressure is too high, the gas pressure pushes the valve core to make the second sealing part close the communication port to realize the self-closing of the self-closing valve. Therefore, the self-adaptive gas self-closing valve solves the problem that the unstable pressure of the pipeline conveying gas sometimes causes the safety risk of the user when the pipeline conveying gas is used in the household.

Description

Technical Field

[0001] This application belongs to the field of gas equipment technology, and in particular relates to an adaptive gas self-closing valve. Background Technology

[0002] Natural gas is a widely used gaseous fuel, delivered to home appliances via pipelines. However, gas pressure can sometimes be unstable within these pipelines, leading to leaks due to excessively high or low pressure. Because natural gas is flammable, explosive, and toxic, leaks can easily cause serious safety accidents.

[0003] Currently, the unstable pressure of gas transported through pipelines manifests itself in the following ways:

[0004] (1) Excessive gas pressure may cause the hose to rupture and leak gas, or cause the flame to be too large and the gas to burn incompletely.

[0005] (2) If the gas pressure is too low, the gas stove will automatically shut off. After the gas pressure returns to normal, the gas will leak because the gas stove at the end of the pipeline is not turned off, which will cause a safety accident. Summary of the Invention

[0006] The purpose of this application is to provide an adaptive gas self-closing valve, which aims to solve the problem that the pressure of gas delivered through pipelines to households is sometimes unstable, causing safety risks to users.

[0007] To achieve the above objectives, the technical solution adopted in this application is: an adaptive gas self-closing valve, comprising:

[0008] The valve body includes a valve seat, which has a first valve chamber, a second valve chamber, an opening, an air inlet passage, and an air outlet passage. The opening is connected to the first valve chamber, the air inlet passage is connected to the second valve chamber, and the air outlet passage is connected to the first valve chamber. A connecting port is provided in the cavity wall between the first valve chamber and the second valve chamber, and the first valve chamber and the second valve chamber are connected through the connecting port.

[0009] The valve core includes a first sealing part and a second sealing part, which are spaced apart. The first sealing part passes through the communication port and is located in the first valve cavity, while the second sealing part is located in the second valve cavity. The first sealing part and the second sealing part can alternately seal the communication port.

[0010] A diaphragm is installed on the valve body and seals the opening. The end of the valve core away from the second sealing part is connected to the diaphragm. The diaphragm provides elastic force to the valve core in the direction from the first sealing part to the second sealing part.

[0011] The elastic element has one end mounted on the valve body and the other end extending toward the diaphragm, with a gap between the other end of the elastic element and the diaphragm. The elastic element provides elastic force to the diaphragm in the direction from the first sealing part to the second sealing part when the diaphragm abuts against the other end of the elastic element.

[0012] In one embodiment, the valve core is an integrally formed component, and both the first sealing part and the second sealing part are set as conical surfaces, with the conical surfaces of the first sealing part and the second sealing part having opposite inclination directions.

[0013] In one embodiment, the valve core further includes a valve core connecting rod, and both the first sealing part and the second sealing part are fixed to the valve core connecting rod. Both the first sealing part and the second sealing part are configured as conical surfaces, and the conical surfaces of the first sealing part and the second sealing part have opposite inclination directions.

[0014] In one embodiment, a rubber sealing member is installed at the communication port, and a first sealing portion passes through the rubber sealing member.

[0015] In one embodiment, the valve body further includes a valve cover that closes to the opening, the periphery of the valve cover and the opening clamping the periphery of the fixed diaphragm, and one end of the elastic member is connected to the valve cover.

[0016] In one embodiment, the elastic element includes a helical spring, one end of which is connected to the valve cover.

[0017] In one embodiment, the adaptive gas self-closing valve further includes a connecting rod, the valve cover is provided with a guide hole, one end of the connecting rod passes through the guide hole, the connecting rod can slide within the guide hole, and the other end of the connecting rod is connected to the side of the diaphragm opposite to the second valve chamber.

[0018] In one embodiment, the connecting rod and the valve core are arranged coaxially.

[0019] In one embodiment, the adaptive gas self-closing valve further includes a knob, a valve cover with a slide structure, a guide hole in the slide structure, a knob sleeve on the slide structure, an end of a connecting rod rotatably connected to the knob, an outer wall of the slide structure with a groove extending parallel to the extension direction of the connecting rod, and a radially inwardly extending protrusion on the knob, the protrusion being slidably disposed in the groove; wherein: the outer wall of the slide structure also has a first slot, the slide and the first slot are connected, and the protrusion can be rotated and engaged in the first slot when the first sealing part seals the connection port; and / or, the outer wall of the slide structure also has a second slot, the slide and the second slot are connected, and the protrusion can be rotated and engaged in the second slot when the second sealing part seals the connection port.

[0020] In one embodiment, the adaptive gas self-closing valve further includes a magnet and an iron block, one of which is fixed to the valve cover and the other is fixed to the slide structure. The magnet and the iron block are magnetically attracted to each other so that the first sealing part keeps the communication port sealed.

[0021] This application has at least the following beneficial effects:

[0022] The adaptive gas self-closing valve of this application consists of a valve body, a valve core, a diaphragm, and a spring element. Through the cooperation of the valve seat, diaphragm, and valve core, the first valve chamber located on the valve seat is connected to the second valve chamber, thereby ensuring the delivery of gas. The diaphragm controls the vertical movement of the valve core, thereby controlling the connection port to connect or close the first and second valve chambers. When the gas pressure delivered by the pipeline is low, the first sealing part of the valve core closes the connection port under the elastic force of the diaphragm, thus closing the gas self-closing valve. When the gas pressure delivered by the pipeline is high, the diaphragm and spring element work together to form a dynamic balance with the gas pressure in the first valve chamber, allowing the valve core to dynamically switch between opening and closing the connection port, thus maintaining dynamic communication between the first and second valve chambers, ensuring that gas is delivered to the appliance at a stable pressure. When the gas pressure delivered by the pipeline exceeds the limit, the gas pressure in the second valve chamber pushes the valve core, causing the second sealing part to close the connection port, thus achieving self-closing of the self-closing valve. Therefore, the adaptive gas self-closing valve of this application solves the problem that the pressure of gas delivered through pipelines to households is sometimes unstable, which poses a safety risk to users. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the adaptive gas self-closing valve according to an embodiment of this application;

[0025] Figure 2 for Figure 1 The main view;

[0026] Figure 3 for Figure 1 The side view (left view);

[0027] Figure 4 This is a cross-sectional view of the adaptive gas self-closing valve according to an embodiment of this application;

[0028] Figure 5 This is an exploded view of the adaptive gas self-closing valve according to an embodiment of this application;

[0029] Figure 6 for Figure 5 A diagram showing the upward-looking direction.

[0030] The following are the labeling elements in the figure:

[0031] 10. Valve seat; 11. First valve chamber; 12. Second valve chamber; 13. Opening; 14. Inlet passage; 15. Outlet passage; 16. Connecting port; 161. Rubber sealing component;

[0032] 20. Valve core; 21. First sealing part; 22. Second sealing part; 23. Valve core connecting rod;

[0033] 30. Membrane;

[0034] 40. Elastic components;

[0035] 50. Valve cover; 51. Guide hole; 52. Slide structure; 521. Slide groove; 522. First retaining groove;

[0036] 60. Connecting rod;

[0037] 70. Knob; 71. Raised surface;

[0038] 81. Magnet; 82. Iron block;

[0039] 91. Filter screen; 92. Screw; 93. Nameplate. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0041] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] Furthermore, the terms "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 indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] like Figure 1 The diagram shows a schematic representation of the adaptive gas self-closing valve of this application. Figure 2 and Figure 3 The diagram shows schematic representations of the adaptive gas self-closing valve of this application in different directions. Figure 4 As shown, a cross-sectional view of the adaptive gas self-closing valve of this application is presented. Figure 5 and Figure 6 As shown, an exploded view of the adaptive gas self-closing valve of this application is presented.

[0045] like Figures 1 to 4 As shown, the adaptive gas self-closing valve includes a valve body, a valve core 20, a diaphragm 30, and a spring element 40. The valve body includes a valve seat 10, which has a first valve chamber 11, a second valve chamber 12, an opening 13, an inlet channel 14, and an outlet channel 15. The opening 13 communicates with the first valve chamber 11, the inlet channel 14 communicates with the second valve chamber 12, and the outlet channel 15 communicates with the first valve chamber 11. A connecting port 16 is provided in the cavity wall between the first valve chamber 11 and the second valve chamber 12, meaning the first valve chamber 11 and the second valve chamber 12 are connected through the connecting port 16. The valve core 20 includes a first sealing part 21 and a second sealing part 22, which are spaced apart. The second sealing part 22 passes through the connecting port 16 and is located in the second valve chamber 12. The first sealing part 21 and the second sealing part 22 can alternately seal the connecting port 16. A diaphragm 30 is mounted on the valve body and seals the opening 13. The end of the valve core 20 away from the second sealing portion 22 is connected to the diaphragm 30. The diaphragm 30 provides a spring force to the valve core 20 in the direction from the first sealing portion 21 to the second sealing portion 22. One end of the elastic member 40 is mounted on the valve body, and the other end of the elastic member 40 extends toward the diaphragm 30, with a gap between the other end of the elastic member 40 and the diaphragm 30. When the diaphragm 30 abuts against the other end of the elastic member 40, the elastic member 40 provides a spring force to the diaphragm 30 in the direction from the first sealing portion 21 to the second sealing portion 22.

[0046] The adaptive gas self-closing valve of this application consists of a valve body, a valve core 20, a diaphragm 30, and a spring element 40. Through the cooperation of the valve seat 10, the diaphragm 30, and the valve core 20, the first valve chamber 11 and the second valve chamber 12 located on the valve seat 10 are connected, thereby ensuring the delivery of gas. The diaphragm 30 controls the vertical movement of the valve core 20, thereby controlling the connection port 16 to connect or close the first valve chamber 11 and the second valve chamber 12. When the gas pressure delivered by the pipeline is low, the first sealing part 21 of the valve core 20 closes the connection port under the elastic force of the diaphragm 30, thereby closing the gas self-closing valve. When the gas pressure delivered by the pipeline is high, the diaphragm 30 and the elastic element 40 cooperate with the gas pressure in the first valve chamber 11 to form a dynamic balance. That is, the gas in the pipeline flows into the second valve chamber 12, and the gas pressure in the second valve chamber 12 pushes up the valve core 20, so the gas flows into the first valve chamber 11 and flows to the appliance. The gas pressure in the first valve chamber 11 increases to push up the diaphragm 30. The diaphragm 30 deforms and abuts against the other end of the elastic element 40. As the gas pressure in the first valve chamber 11 continues to increase, the elastic element 40 generates an interactive balancing elastic force until the valve core 20 is pushed up to the second sealing part 22 to close the connection port 16. After the second sealing part 22 closes the connection port 16, the gas in the first valve chamber 11 continues to flow to the appliance, so that the first valve core 20 is closed. When the gas pressure in valve chamber 11 decreases, the valve core 20 moves under the elastic force of the diaphragm 30 and the elastic element 40, causing the second sealing part 22 to open the connection port 16. The gas in the second valve chamber 12 flows back into the first valve chamber 11, and this cycle repeats. This allows the valve core 20 to dynamically switch the connection port 16 between opening and closing, thus maintaining dynamic communication between the first valve chamber 11 and the second valve chamber 12, ensuring that the gas is delivered to the appliance at a stable pressure. When the inlet pressure is within the safe output pressure range, the diaphragm 30 and the elastic element 40 form a static balance with the gas pressure in the first valve chamber 11, keeping the connection port 16 in a normally open state to deliver gas to the appliance. When the gas pressure delivered by the pipeline exceeds the limit, the gas pressure in the second valve chamber 12 pushes the valve core 20, causing the second sealing part 22 to close the connection port 16, thus achieving self-closing of the self-closing valve. Therefore, the adaptive gas self-closing valve of this application solves the problem that the pressure of gas delivered through pipelines to households is sometimes unstable, which poses a safety risk to users.

[0047] like Figure 5 and Figure 6As shown, the valve core 20 is a one-piece molded component. Both the first sealing portion 21 and the second sealing portion 22 are conical surfaces, with the conical surfaces of the first sealing portion 21 and the second sealing portion 22 having opposite inclination directions. In another embodiment, the valve core 20 further includes a valve core connecting rod 23. The first sealing portion 21 and the second sealing portion 22 are both independent parts relative to the valve core connecting rod 23. Both the first sealing portion 21 and the second sealing portion 22 are fixed to the valve core connecting rod 23, and both the first sealing portion 21 and the second sealing portion 22 are conical surfaces, with the conical surfaces of the first sealing portion 21 and the second sealing portion 22 having opposite inclination directions.

[0048] Furthermore, a rubber sealing member 161 is installed at the connecting port 16, and the first sealing part 21 passes through the rubber sealing member 161. The rubber sealing member 161 may also have two conical surfaces, and the two conical surfaces of the rubber sealing member 161 have the same inclination angle as the conical surfaces of the first sealing part 21 and the second sealing part 22. Therefore, the rubber sealing member 161 and the valve core 20 can be sealed together.

[0049] When the intake pressure is low, the valve core 20, under the elastic force of the diaphragm 30, seals the rubber sealing member 161 with the first sealing part 21, closing the adaptive gas shut-off valve. That is, when the gas pressure is low, the force pushing the diaphragm 30 upwards is insufficient, and under the downward elastic force of the diaphragm 30, the valve core 20 moves downwards, causing the first sealing part 21 to block the connection port 16 and close the adaptive gas shut-off valve. Furthermore, when the adaptive gas shut-off valve is not installed on the pipeline or when it is installed but the pipeline is not ventilated, the valve core 20, under the elastic force of the diaphragm 30, seals the rubber sealing member 161 with the first sealing part 21; that is, the adaptive gas shut-off valve is normally closed when not installed and ventilated.

[0050] When the intake pressure is high, the gas first enters the second valve chamber 12, and the gas pushes up the valve core 20, causing the first sealing part 21 and the rubber sealing member 161 to separate. Then the gas enters the first valve chamber 11 and acts on the diaphragm 30, causing the diaphragm 30 to bulge upward under the action of the gas pressure. The upwardly bulging diaphragm 30 then contacts the elastic member 40, and the pressure of the gas pressure on the diaphragm 30 is greater than the elastic force of the elastic member 40, causing the valve core 20 to rise until the second sealing part 22 and the rubber sealing member 161 cooperate to close the communication port 16. After the connection port 16 is closed, the appliance continues to burn gas. Then, the pressure in the first valve chamber 11 decreases, and the elastic force of the spring element 40 becomes the dominant force acting on the valve core 20 (that is, after the gas in the first valve chamber 11 is burned, the elastic force of the spring element 40 is greater than the sum of the gas pressure in the first valve chamber 11 and the gas pressure in the second valve chamber 12). This causes the valve core 20 to descend, thereby opening the connection port 16 at the second sealing part 22 of the valve core 20 and reconnecting the first valve chamber 11 and the second valve chamber 12. This cycle allows the valve core 20 to be in a state of dynamic equilibrium under the coordination of the spring element 40, the diaphragm 30, and the changing gas pressure in the first valve chamber 11 and the second valve chamber 12. This keeps the gas pressure in the first valve chamber 11 within a suitable range, ensuring that the gas is delivered to the appliance at a normal pressure, thus ensuring normal combustion of the appliance.

[0051] When the intake pressure is too high (at this time, the gas pressure in the pipeline is the over-limit pressure, that is, the gas pressure exceeds the upper limit of the safe gas transmission pressure range), the gas enters the second valve chamber 12 and pushes up the valve core 20, so that the rubber sealing member 161 and the second sealing part 22 seal and close the adaptive gas self-closing valve. Because the gas pressure is too high, the pressure of the gas in the second valve chamber 12 acting on the second sealing part 22 is always greater than the elastic force of the elastic member 40 and the diaphragm 30. As a result, the second sealing part 22 of the valve core 20 and the rubber sealing member 161 remain closed until the gas pressure in the pipeline drops below the upper limit of the safe pressure range, and only then can the adaptive gas self-closing valve resume normal gas transmission.

[0052] When the intake pressure is within the safe output pressure range (i.e., the gas pressure in the pipeline is neither too high nor too low), the gas first enters the second valve chamber 12. The gas pushes up the valve core 20, causing the first sealing part 21 and the rubber sealing member 161 to separate. Then, the gas enters the first valve chamber 11 and acts on the diaphragm 30, causing the diaphragm 30 to bulge upward under the action of the gas pressure. The upwardly bulging diaphragm 30 then contacts the elastic member 40. The pressure of the gas pressure continuing to act on the diaphragm 30 will reach a balance with the sum of the elastic force of the elastic member 40 and the elastic force of the diaphragm 30. At this time, the gas pressure, the diaphragm 30 and the elastic member 40 work together to make the valve core 20 suspend in the rubber sealing member 161. That is, at this time, neither the first sealing part 21 nor the second sealing part 22 of the valve core 20 is in contact with the rubber sealing member 161, that is, the valve core 20 and the rubber sealing member 161 are kept in the open state, the adaptive gas valve always maintains normal gas supply, and the adaptive self-closing valve will not enter the dynamic balance mode of "open → close → open" cycle.

[0053] like Figure 4 As shown, the valve body also includes a valve cover 50, which covers the opening 13. The periphery of the valve cover 50 and the opening 13 clamps the periphery of the fixed diaphragm 30. One end of the elastic member 40 is connected to the valve cover 50. The valve cover 50, the fixed diaphragm 30, and the valve seat 10 cooperate to seal both the first valve chamber 11 and the second valve chamber 12, preventing gas from leaking out of the opening 13.

[0054] like Figure 5 and Figure 6 As shown, the elastic element 40 includes a helical spring, one end of which is connected to the valve cover 50. A gap of approximately 3mm-5mm exists between the other end of the helical spring and the diaphragm 30. The adaptive gas shut-off valve also includes a connecting rod 60. The valve cover 50 has a guide hole 51. One end of the connecting rod 60 passes through the guide hole 51 and can slide within it. The other end of the connecting rod 60 is connected to the side of the diaphragm 30 opposite to the second valve chamber 12. The helical spring is sleeved on the connecting rod 60. The connecting rod 60 and the valve core 20 are coaxially arranged, which facilitates further manual adjustment of the adaptive gas shut-off valve's state.

[0055] Specifically, such as Figure 5 and Figure 6As shown, the adaptive gas self-closing valve also includes a knob 70, a valve cover 50 with a slide structure 52, a guide hole 51 in the slide structure 52, a knob 70 fitted over the slide structure 52, and an end of a connecting rod 60 rotatably connected to the knob 70. The outer wall of the slide structure 52 has a groove 521, the extension direction of which is parallel to the extension direction of the connecting rod 60. The knob 70 has a radially inwardly extending protrusion 71, which slides within the groove 521. The outer wall of the slide structure 52 also has a first locking groove 522, which connects the groove 521. The protrusion 71 can rotate and engage with the first locking groove 522 when the first sealing part 21 seals the connecting port 16. At this time, the knob 70 drives the connecting rod 60, which in turn drives the valve core 20 to a lower position, i.e., the first sealing part 21 is sealed to the rubber sealing member 161, thus achieving the effect of manually closing the adaptive gas self-closing valve.

[0056] In this embodiment, the valve cover 50 and the slide structure 52 are integrally formed.

[0057] Furthermore, the adaptive gas self-closing valve also includes a magnet 81 and an iron block 82. One of the magnet 81 and the iron block 82 is fixed to the knob 70, and the other is fixed to the slide structure 52. The magnet 81 and the iron block 82 are magnetically attracted to each other, so that the knob 70 has a tendency to move towards the valve seat 10. In the embodiment of this application, it is preferably configured that the magnet 81 is fixed to the knob 70 and the iron block 82 is fixed to the slide structure 52. When the gas pressure is low, the valve core 20 moves downward under the elastic force of the elastic member 40, and the first sealing part 21 contacts the rubber sealing member 161 to close the communication port 16. At the same time, the valve core 20 drives the connecting rod 60 and the knob 70 to move downward. The magnet 81 on the knob 70 and the iron block 82 on the slide structure 52 are magnetically attracted to each other. Thus, the magnet 81 and the iron block 82 are magnetically attracted to each other to apply a stationary force to the diaphragm 30 and the valve core 20 to ensure that the adaptive gas self-closing valve is in a normally closed state. When the gas pressure rises to the safe gas supply pressure range, but the upward thrust of the gas pressure is less than the magnetic attraction of magnet 81 and iron block 82, the gas pressure alone is insufficient to move the valve core 20 upward and open the connection port 16. Manual lifting of knob 70 is necessary to separate magnet 81 and iron block 82 and open the connection port 16. This ensures that the adaptive gas self-closing valve will automatically close in case of low gas pressure, and that when the gas pressure rises to the safe gas supply pressure range, manual operation is required to reopen the connection port 16 for normal gas supply (however, when the gas pressure suddenly rises above the upper limit of the safe gas supply pressure, i.e., the upward thrust of the gas pressure exceeds the magnetic attraction of magnet 81 and iron block 82, and the gas pressure can still achieve normal gas supply after being controlled by the adaptive gas self-closing valve, which is the aforementioned "higher inlet pressure" situation, the gas pressure, diaphragm 30, and elastic element 40 work together to maintain dynamic balance of valve core 20 in connection port 16, thus maintaining normal gas supply).

[0058] like Figure 5 and Figure 6 As shown, the adaptive gas shut-off valve also includes a nameplate 93 and a screw 92. The knob 70 has a hole through which the screw 92 passes, connecting to the connecting rod 60 and securing the knob 70 and connecting rod 60 together. This ensures that the knob 70 can move axially along with the connecting rod 60. The nameplate 93 is located on the outside of the knob 70 to conceal the screw 92, further protecting it. The nameplate 93 also displays relevant information about the adaptive gas shut-off valve.

[0059] like Figures 4 to 6As shown, the adaptive gas self-closing valve also includes a filter screen 91, which is located inside the air intake channel 14, specifically at the end of the internal thread of the air intake channel 14. The filter screen 91 is used to further filter the natural gas and block and filter out the debris and impurities carried in the gas pipeline during the gas transportation process.

[0060] In addition to the functions described above, the adaptive gas shut-off valve of this application can also serve to detect whether there is a potential leakage in the gas delivery hose at the rear end of the adaptive gas shut-off valve.

[0061] The adaptive gas shut-off valve of this application can detect potential gas leakage in the gas supply hose (not shown) between the gas channel 15 and the gas appliance (not shown). The detection process is as follows: the valve front-end pipe switch of the adaptive gas shut-off valve is normally open and gas is normally supplied (generally, the gas pressure in the pipe is within the safe gas supply pressure range, so the valve core 20 of the adaptive gas shut-off valve is in a suspended state and the connection port 16 remains open). Then, the hose end connected to the gas appliance is closed (i.e., the gas stove switch is turned off). Next, the valve front-end pipe switch of the adaptive gas shut-off valve is manually closed. If the hose does not leak, the gas pressure in the hose and the gas pressure in the first valve chamber 11 and the second valve chamber 12 of the adaptive gas shut-off valve remain unchanged, so the valve core 20 of the adaptive gas shut-off valve remains unchanged. The valve is in the open state, suspended above the connection port 16 (this can be determined by observing the relative position of the knob 70 relative to the slide structure 52). If there is a gas leak in the pipeline behind the valve, the gas will leak in the pipeline behind the valve after a period of time (the gas will continue to leak until it is completely exhausted). That is, the gas pressure in the pipeline behind the valve will drop after a period of time (until the gas pressure drops to zero). Then, the valve core 20 of the adaptive gas self-closing valve will move and descend under the elastic force of the elastic member 40 and the diaphragm 30. When the gas pressure drops to a certain pressure value, the first sealing part 21 of the valve core 20 abuts against the rubber sealing member 161 under the elastic force of the diaphragm 30 to close the connection port 16 (that is, the adaptive gas self-closing valve automatically closes, which can be determined by observing the relative position of the knob 70 relative to the slide structure 52).

[0062] The adaptive gas self-closing valve of this application also has a second embodiment, which is not shown in the accompanying drawings. Compared with the first embodiment, the second embodiment has the following differences.

[0063] Specifically, the outer wall of the slide structure 52 is also provided with a second slot (not shown). The slide groove 521 and the second slot are connected. The protrusion 71 can be rotated and locked into the second slot when the second sealing part 22 seals the connecting port 16. At this time, the knob 70 drives the connecting rod 60 and then drives the valve core 20 to be stabilized in a higher position. The second sealing part 22 is sealed and connected with the rubber sealing member 161, thereby achieving the effect of manually closing the adaptive gas self-closing valve.

[0064] In one embodiment, the second slot and the first slot 522 can coexist or exist separately, and both serve to manually control the adaptive gas self-closing valve.

[0065] The adaptive gas self-closing valve of the second embodiment is the same as the adaptive gas self-closing valve of the first embodiment except for the above-mentioned structural differences, and will not be described again here.

[0066] The adaptive gas self-closing valve of this application consists of a valve body, a valve core 20, a diaphragm 30, and a spring element 40. Through the cooperation of the valve seat 10, the diaphragm 30, and the valve core 20, the first valve chamber 11 and the second valve chamber 12 located on the valve seat 10 are connected, thereby ensuring the delivery of gas. The spring element 40 is connected to the diaphragm 30, and the two together control the movement of the valve core 20, thereby controlling the connection port 16 to connect or close the first valve chamber 11 and the second valve chamber 12. When the gas pressure delivered by the pipeline is high, a dynamic balance is achieved between the diaphragm 30 and the elastic element 40, allowing the valve core 20 to dynamically switch between opening and closing the control port 16. This maintains dynamic communication between the first valve chamber 11 and the second valve chamber 12, ensuring a stable gas pressure delivery to the appliance. When the gas pressure delivered by the pipeline is low, the valve core 20 closes the control port under the elastic force of the diaphragm 30, thereby closing the gas self-closing valve. The valve remains normally closed due to the constant force provided by the magnetic attraction between the magnet 81 and the iron block 82. The valve can only be opened manually for normal gas supply. Therefore, the adaptive gas self-closing valve of this application solves the safety risks to users caused by unstable gas pressure during pipeline gas delivery to homes.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An adaptive gas self-closing valve, characterized in that, include: The valve body includes a valve seat, which has a first valve cavity, a second valve cavity, an opening, an air inlet channel, and an air outlet channel. The opening is connected to the first valve cavity, the air inlet channel is connected to the second valve cavity, and the air outlet channel is connected to the first valve cavity. A communication port is provided in the cavity wall between the first valve cavity and the second valve cavity, and the first valve cavity and the second valve cavity are connected through the communication port. The valve core includes a first sealing part and a second sealing part, which are spaced apart. The first sealing part passes through the communication port and is located in the first valve cavity, while the second sealing part is located in the second valve cavity. The first sealing part and the second sealing part can alternately seal the communication port. A diaphragm is installed on the valve body and seals the opening. The end of the valve core away from the second sealing part is connected to the diaphragm. The diaphragm provides elastic force to the valve core in the direction from the first sealing part to the second sealing part. When the gas pressure delivered by the pipeline is low, the first sealing part of the valve core closes the communication port under the elastic force of the diaphragm, thereby closing the gas self-closing valve. The elastic element includes a helical spring. The valve body also includes a valve cover and a connecting rod. The valve cover closes to the opening. One end of the helical spring is connected to the valve cover, and the other end of the helical spring extends toward the diaphragm. Initially, there is a gap between the other end of the helical spring and the diaphragm, which is 3mm-5mm. The valve cover has a guide hole. One end of the connecting rod passes through the guide hole and can slide within it. The other end of the connecting rod is connected to the side of the diaphragm facing away from the second valve cavity. A spring sleeve is fitted onto the connecting rod, which is coaxially arranged with the valve core. Both the first sealing part and the second sealing part are conical surfaces with opposite inclination directions. A rubber sealing member is installed at the communication port, and the second sealing part passes through the rubber sealing member. When the gas pressure delivered by the pipeline is less than the elastic force of the diaphragm in its initial state, the first sealing part closes the communication port under the action of the elastic force of the diaphragm. When the gas pressure delivered by the pipeline exceeds the limit, the gas pressure overcomes the sum of the deformation elastic force of the diaphragm and the elastic force of the helical spring, causing the second sealing part to close the communication port.

2. The adaptive gas self-closing valve according to claim 1, characterized in that, The valve core is a one-piece molded component.

3. The adaptive gas self-closing valve according to claim 1, characterized in that, The valve core also includes a valve core connecting rod, and both the first sealing part and the second sealing part are fixed to the valve core connecting rod.

4. The adaptive gas self-closing valve according to any one of claims 1-3, characterized in that, The valve cover and the periphery of the opening clamp and fix the periphery of the diaphragm, and one end of the elastic member is connected to the valve cover.

5. The adaptive gas self-closing valve according to any one of claims 1-3, characterized in that, The adaptive gas self-closing valve also includes a knob, the valve cover is provided with a slide structure, the guide hole is provided in the slide structure, the knob is sleeved on the slide structure, the end of the connecting rod is rotatably connected to the knob, the outer wall of the slide structure is provided with a slide groove, the extension direction of the slide groove is parallel to the extension direction of the connecting rod, and the knob is provided with a radially inwardly extending protrusion, the protrusion being slidably disposed in the slide groove; Wherein: the outer wall of the slide structure is also provided with a first slot, the slide and the first slot are connected, and the protrusion can be rotated and locked into the first slot when the first sealing part seals the connection port; and / or, the outer wall of the slide structure is also provided with a second slot, the slide and the second slot are connected, and the protrusion can be rotated and locked into the second slot when the second sealing part seals the connection port.

6. The adaptive gas self-closing valve according to claim 5, characterized in that, The adaptive gas self-closing valve also includes a magnet and an iron block. One of the magnet and the iron block is fixed to the valve cover, and the other is fixed to the slide structure. The magnet and the iron block are magnetically attracted to each other so that the first sealing part keeps the communication port sealed.

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