Valve element and proportional valve thereof

Abstract

The proportional valve comprises an upper valve cover, a lower valve cover and a drum membrane, the drum membrane is arranged between the upper valve cover and the lower valve cover, the circumference of the drum membrane is of an annular structure and extends to the edge of the upper valve cover and the edge of the lower valve cover, the bottom end face of the lower valve cover is provided with a buckling groove of an annular structure, and the buckling groove is communicated with the upper valve cover and the lower valve cover. A sealing rubber ring is arranged on the top end face of the lower valve cover, an elastic piece is arranged in the sealing rubber ring, the sealing rubber ring can extend downwards into the buckling groove through the elastic piece, and the sealing rubber ring extends downwards into the buckling groove through the elastic piece, so that a limiting and fixing structure can be formed by the lower valve cover and the L-shaped pipe opening; the elastic piece and the sealing rubber ring can increase the friction force between the lower valve cover and the L-shaped pipe opening and improve the sealing performance, so that the valve element and the proportional valve of the valve element can keep a stable closed structure in the state that the driving component loses efficacy, and meanwhile the sealing performance of the proportional valve is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of hardware valve technology, and in particular to a valve core and its proportional valve. Background Technology

[0002] Proportional control valves are widely used in various gas water heaters on the market. They use proportional control technology, which is a technical means to achieve a linear relationship between the controlled variable and the controlled variable of a component or system (ensuring that the output changes proportionally with the input), to control the gas flow rate, keep the gas inlet pressure of the gas appliance stable, and solve the problem of unstable gas combustion caused by fluctuations in the gas inlet pressure of the gas water heater.

[0003] However, in existing proportional valves, the actuation mechanism that forms the closed loop between the valve core and the valve body is determined by the actuation component. When the proportional valve needs to maintain a closed state for a long period, the actuation component must continuously output driving force. Conversely, when the actuation component fails, the valve core is easily affected by gas pressure, causing the valve body to lose its closed structure. Therefore, there is an urgent need to develop a valve core and its corresponding proportional valve to meet practical application requirements. Utility Model Content

[0004] The purpose of this invention is to provide a valve core and its proportional valve to solve the above-mentioned defects.

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

[0006] A valve core includes an upper valve cover, a lower valve cover, and a diaphragm. The diaphragm is disposed between the upper and lower valve covers, and its circumference forms an annular structure extending to the edges of the upper and lower valve covers. The bottom end face of the lower valve cover is provided with an annular groove, and the top end face of the lower valve cover is provided with a sealing ring. An elastic element is provided inside the sealing ring, and the sealing ring can extend downward into the groove through the elastic element.

[0007] As a further embodiment of the above description, the top surface of the lower valve cover is provided with an upwardly protruding mounting post, and the center of the diaphragm is provided with a clearance hole that matches the mounting post. The lower valve cover is threaded to the bottom of the upper valve cover through the mounting post and the clearance hole.

[0008] In the above description, as a further solution, the elastic element is composed of a ring-shaped spring, which is embedded in the top surface of the sealing ring, and when the upper valve cover and the lower valve cover are connected, the upper valve cover abuts against the upper surface of the spring.

[0009] A proportional valve includes a valve body, a drive component, and the aforementioned valve core. The valve body has a through cavity inside. The valve core is located between a cover portion and a tube portion. The drive component is located at the top of the cover portion. The valve core can move up and down between the cover portion and the tube portion via the drive component. The through cavity also has an "L"-shaped port. One end of the "L"-shaped port can be engaged with the snap groove of the lower valve cover. A sealing ring can abut against the end of the "L"-shaped port through an elastic element.

[0010] As a further embodiment of the above description, the valve body includes a cover portion and a tube portion, with the opening for the inner cavity located on the top surface of the tube portion, and the edge of the diaphragm clamped and fixed at the connection between the cover portion and the tube portion.

[0011] As a further embodiment of the above description, the two ends of the pipe body are respectively provided with an air inlet and an air outlet. The end of the "L"-shaped pipe away from the valve core is connected to the air inlet, and the air outlet is connected to the conductive inner cavity.

[0012] In the above description, as a further solution, the driving component is composed of an electromagnet, the output end of which is a retractable push rod. The top surface of the upper valve cover is provided with a recessed groove that matches the push rod, and the electromagnet is clearance-fitted with the recessed groove of the upper valve cover through the push rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by providing a groove matching the "L"-shaped pipe opening on the bottom end face of the lower valve cover, and extending the sealing ring downward into the groove through the elastic element, the lower valve cover can form a limiting and fixed structure with the "L"-shaped pipe opening. Moreover, the elastic element and the sealing ring can increase the friction between the lower valve cover and the "L"-shaped pipe opening and improve the sealing performance, so that the valve core and its proportional valve of this application can maintain a stable closed structure in the state of failure of the drive component, while enhancing the sealing performance of the proportional valve. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a valve core as described in this embodiment;

[0015] Figure 2 This is an exploded view of the valve core structure described in this embodiment;

[0016] Figure 3 This is a cross-sectional view of a valve core as described in this embodiment;

[0017] Figure 4 This is a three-dimensional structural diagram of a proportional valve described in this embodiment, viewed in partial cross-section.

[0018] Figure 5 This is an exploded view of the proportional valve described in this embodiment;

[0019] Figure 6 This is a cross-sectional view of a proportional valve as described in this embodiment;

[0020] In the diagram: 1-Upper valve cover, 11-Lower groove, 2-Lower valve cover, 21-Mounting post, 22-Sealing ring, 23-Snap groove, 3-Diaphragm, 31-Void hole, 4-Spring, 5-Valve body, 51-Cover body, 52-Pipe body, 521-Inlet port, 522-Outlet port, 523-"L" shaped port, 524-Conducting inner cavity, 6-Drive component, 61-Push rod. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] For this embodiment, please refer to Figures 1-6 The present invention relates to a valve core and its proportional valve, wherein the valve core includes an upper valve cover 1, a lower valve cover 2 and a diaphragm 3. The diaphragm 3 is disposed between the upper valve cover 1 and the lower valve cover 2. The circumference of the diaphragm 3 forms an annular structure extending to the edge of the upper valve cover 1 and the lower valve cover 2. The bottom end face of the lower valve cover 2 is provided with an annular groove 23. The top end face of the lower valve cover 2 is provided with a sealing ring 22. The sealing ring 22 has an elastic element inside. The sealing ring 22 can extend downward into the inside of the groove 23 through the elastic element.

[0023] Specifically, such as Figure 2 and 3 As shown, the installation structure between the upper valve cover 1, the lower valve cover 2 and the diaphragm 3 is as follows: the center of the top surface of the lower valve cover 2 is provided with an upwardly protruding mounting post 21, and the center of the diaphragm 3 is provided with a clearance hole 31 that matches the mounting post 21. The lower valve cover 2 is threadedly connected to the bottom of the upper valve cover 1 through the mounting post 21 and the clearance hole 31. The elastic element is composed of a ring-shaped spring 4. The spring 4 is embedded in the top surface of the sealing ring 22, and when the upper valve cover 1 and the lower valve cover 2 are connected, the upper valve cover 1 abuts against the upper surface of the spring 4.

[0024] Among them, such as Figure 4 and 6 As shown, a proportional valve includes a valve body 5, a drive component 6, and the aforementioned valve core. The valve body 5 has a conductive inner cavity 524 inside. The valve core is disposed between a cover portion 51 and a tube portion 52. The drive component 6 is disposed at the top end of the cover portion 51. The valve body 5 includes a cover portion 51 and a tube portion 52. The opening of the conductive inner cavity 524 is formed on the top end face of the tube portion 52. The edge of the diaphragm 3 is clamped and fixed at the connection between the cover portion 51 and the tube portion 52.

[0025] The valve core can move up and down between the cover part 51 and the tube part 52 via the drive component 6. The inner cavity 524 is also provided with an "L" shaped tube port 523. One end of the "L" shaped tube port 523 can be fastened to the buckle groove 23 of the lower valve cover 2. The sealing ring 22 can be abutted against the end of the "L" shaped tube port 523 by the elastic element.

[0026] The two ends of the pipe body 52 are respectively provided with an air inlet 521 and an air outlet 522. The end of the "L"-shaped pipe 523 away from the valve core is connected to the air inlet 521. The air outlet 522 is connected to the conductive inner cavity 524. The driving component 6 is composed of an electromagnet. The output end of the electromagnet is a telescopic push rod 61. The top surface of the upper valve cover 1 is provided with a recessed groove 11 that matches the push rod 61. The electromagnet is in clearance fit with the recessed groove 11 of the upper valve cover 1 through the push rod 61.

[0027] The valve core of this application has a groove 23 on the bottom end face of the lower valve cover 2 that matches the "L"-shaped port 523, and a sealing ring 22 is extended downward into the groove 23 by an elastic element. This allows the lower valve cover 2 to form a limiting and fixed structure with the "L"-shaped port 523. The elastic element and the sealing ring 22 can increase the friction between the lower valve cover 2 and the "L"-shaped port 523 and improve the sealing performance. This allows the valve core and its proportional valve of this application to maintain a stable closed structure even when the drive component 6 fails, while also enhancing the sealing performance of the proportional valve.

[0028] The working process of a valve core and its proportional valve: the drive component 6 controls the push rod 61 to lift upward, which drives the upper valve cover 1 and the lower valve cover 2 to move upward. The groove 23 on the bottom end face of the lower valve cover 2 separates from the "L"-shaped port 523. Gas can enter the interior of the conductive inner cavity 524 through the "L"-shaped port 523 along the air inlet port 521. At the same time, the gas inside the conductive inner cavity 524 can be discharged outward through the air outlet port.

[0029] When the drive component 6 controls the push rod 61 to move downward, the lower valve cover can move downward to the opening of the "L"-shaped pipe. At the same time, the sealing ring 22 extends downward into the inside of the groove 23 through the elastic element, so that the lower valve cover 2 can form a limiting and fixed structure with the "L"-shaped pipe opening 523. The elastic element and the sealing ring 22 can increase the friction between the lower valve cover 2 and the "L"-shaped pipe opening 523 and improve the sealing performance, maintaining a stable closed structure.

[0030] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A valve core characterized by: The valve core comprises an upper valve cover, a lower valve cover and a diaphragm, the diaphragm is arranged between the upper valve cover and the lower valve cover, the circumference of the diaphragm extends to the edges of the upper valve cover and the lower valve cover in an annular structure, the bottom end surface of the lower valve cover is provided with a annular structure of a buckle groove, the top end surface of the lower valve cover is provided with a sealing rubber ring, the inside of the sealing rubber ring is provided with an elastic member, and the sealing rubber ring can extend to the inside of the buckle groove through the elastic member.

2. A valve core according to claim 1, characterised in that: The top end surface of the lower valve cover is provided with an upwardly protruding mounting column, the center of the diaphragm is provided with a clearance hole matched with the mounting column, and the lower valve cover is threadedly connected with the bottom of the upper valve cover through the mounting column penetrating the clearance hole.

3. A valve core according to claim 2, characterised in that: The elastic member is composed of a spring in an annular structure, the spring is embedded in the top end surface of the sealing rubber ring, and the upper valve cover abuts against the upper surface of the spring when the upper valve cover and the lower valve cover are connected.

4. A proportional valve characterized by: The valve body is provided with a through inner cavity, the valve core is arranged between the cover body and the pipe body, the driving component is arranged at the top end of the cover body, the valve core can move up and down between the cover body and the pipe body through the driving component, the inside of the through inner cavity is further provided with an "L" type pipe opening, one end of the "L" type pipe opening can be buckled with the buckle groove of the lower valve cover, and the sealing rubber ring can abut against the end of the "L" type pipe opening through the elastic member.

5. A proportional valve according to claim 4, characterised in that: The valve body comprises a cover body and a pipe body, the opening of the through inner cavity is arranged at the top end surface of the pipe body, and the edges of the diaphragm are clamped and fixed at the connection between the cover body and the pipe body.

6. A proportional valve according to claim 5, characterised in that: The two ends of the pipe body are respectively provided with an air inlet pipe opening and an air outlet pipe opening, one end of the "L" type pipe opening away from the valve core is in communication with the air inlet pipe opening, and the air outlet pipe opening is in communication with the through inner cavity.

7. A proportional valve according to claim 5, characterized in that: The driving component is composed of an electromagnet, the output end of the electromagnet is a telescopic push rod, the top end surface of the upper valve cover is provided with a sunken groove matched with the push rod, and the electromagnet is gap-connected with the sunken groove of the upper valve cover through the push rod.

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