Destressing mechanism for mounting diaphragm of gas proportional valve

Abstract

The utility model discloses a fuel gas proportional valve diaphragm installation destressing mechanism which comprises a base, a longitudinally-formed vent hole is formed in the base, a valve body of a fuel gas proportional valve is placed on the base, the vent hole is longitudinally communicated with a valve cavity in the fuel gas proportional valve, and the valve body of the fuel gas proportional valve is arranged in the valve cavity of the fuel gas proportional valve. A diaphragm of the fuel gas proportional valve is placed on a gas source right above the valve cavity of the valve body, the gas source is communicated with the bottom of the vent hole, and gas enters the gas source so that the diaphragm placed on the valve body can be suspended and centered. And the leather membrane in the center state is compressed and mounted on the valve body through the cover body of the fuel gas proportional valve. The utility model ensures that the installation position of the leather film is accurate, improves the sealing performance of the product, improves the qualification rate of the product, and is suitable for mass production.

Description

Technical Field

[0001] The utility model relates to the technical field of gas proportional valve assembly, in particular to a gas proportional valve diaphragm installation stress relief mechanism. Background Art

[0002] In the prior art, the installation of the gas proportional valve is to first position the valve body on a workbench, then have the operator place the diaphragm on the valve body, then install the cover body on the valve body, and press the cover body against the diaphragm to complete the assembly. Since the diaphragm is a flexible part, there will be deviations after it is placed on the valve body, and the position is not centered, resulting in insufficient sealing between the diaphragm and the valve body after the cover body presses against the diaphragm, resulting in air leakage, which results in unqualified products with a low pass rate, and is not suitable for mass production. Summary of the invention

[0003] In view of the above-mentioned problems existing in the diaphragm installation of the existing gas proportional valve, the present invention aims to provide a gas proportional valve diaphragm installation stress relief mechanism, which uses an air source to blow air upwards towards the diaphragm during the assembly process, so that the diaphragm is suspended in the center, and then the diaphragm is installed in the center position after it drops due to its own weight, and then the cover body is installed, thereby ensuring the accurate installation position of the diaphragm, improving the sealing of the product, and improving the product qualification rate, which is suitable for mass production.

[0004] The specific technical solutions are as follows:

[0005] A gas proportional valve diaphragm installation stress relief mechanism, comprising:

[0006] A base, wherein the base has a vent hole longitudinally opened thereon, the valve body of the gas proportional valve is placed on the base, and the vent hole is longitudinally connected to the valve cavity in the gas proportional valve, and the membrane of the gas proportional valve is placed directly above the valve cavity of the valve body;

[0007] An air source is connected to the bottom of the air vent, and the air source takes in air so that the membrane placed on the valve body is suspended and centered, and the membrane in the centered state is pressed and installed on the valve body through the cover body of the gas proportional valve.

[0008] The above-mentioned gas proportional valve diaphragm installation stress relief mechanism, wherein the valve body of the gas proportional valve is provided with two through-ports communicated with the valve cavity, and the through-ports are blocked and matched by blocking pieces.

[0009] The above-mentioned gas proportional valve diaphragm installation stress relief mechanism, wherein, further comprises: at least one pressing mechanism, wherein the pressing mechanism longitudinally presses the cover body, thereby pressing the diaphragm in the centered state.

[0010] The above-mentioned gas proportional valve diaphragm is installed with a stress relief mechanism, wherein the clamping mechanism includes: a first driving member, a second driving member and a pressure block, the first driving member is transmission-connected with the second driving member and the pressure block so that the second driving member and the pressure block can move longitudinally, the second driving member is transmission-connected with the pressure block so that the pressure block can move horizontally, and the cover body is clamped by the pressure block.

[0011] The above-mentioned gas proportional valve diaphragm installation stress relief mechanism, wherein, further comprises: two third driving members, the two third driving members are respectively connected to the two blocking members in a transmission manner, so that the blocking members cooperate with the through-port blocking.

[0012] In the above-mentioned gas proportional valve diaphragm installation stress relief mechanism, at least two positioning members are provided on the base, and the two positioning members are positioned and matched with the valve body.

[0013] The above-mentioned gas proportional valve diaphragm installation stress relief mechanism, wherein, further comprises: a workbench, and the base, the first driving member, the third driving member and the gas source are all installed on the workbench.

[0014] The above-mentioned gas proportional valve diaphragm installation stress relief mechanism, wherein the first driving member is transmission-connected to the second driving member through a transmission assembly;

[0015] The transmission assembly includes: a connecting plate and a transmission rod, the connecting plate is transmission-connected to the first driving member, one end of the transmission rod is fixedly connected to the connecting plate, and the other end of the transmission rod is fixedly connected to the second driving member.

[0016] The above-mentioned gas proportional valve diaphragm installation stress relief mechanism, wherein the transmission component also includes: a guide sleeve, the guide sleeve is installed on the workbench, the guide sleeve is vertically arranged, and the conduction rod slides through the guide sleeve.

[0017] The above-mentioned gas proportional valve diaphragm installation stress relief mechanism, wherein the workbench is provided with a connecting port, the connecting port is connected to the vent hole, and the gas source is connected to the connecting port.

[0018] Compared with the prior art, the above technical solution has the following positive effects:

[0019] The utility model uses an air source to blow air upwards to the membrane in the assembly process, so that the membrane is suspended in the middle, and after the membrane drops due to its own weight, it is in the middle position of installation, and then the cover body is installed, thereby ensuring the accurate installation position of the membrane, improving the sealing of the product, and improving the qualified rate of the product, which is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the overall structure of a gas proportional valve diaphragm installation stress relief mechanism of the utility model;

[0021] Figure 2 It is a top view of the overall structure of a gas proportional valve diaphragm installation stress relief mechanism of the utility model;

[0022] Figure 3 It is a side view of the overall structure of a gas proportional valve diaphragm installation stress relief mechanism of the utility model;

[0023] Figure 4 It is a schematic diagram of the overall structure of a gas proportional valve diaphragm installation stress relief mechanism of the utility model;

[0024] Figure 5 It is a schematic diagram of the exploded structure of a gas proportional valve with a gas proportional valve diaphragm mounted stress relief mechanism according to the utility model;

[0025] Figure 6 It is a structural cross-sectional view of a gas proportional valve with a gas proportional valve diaphragm mounted with a stress relief mechanism according to the utility model;

[0026] In the attached drawings: 1. base; 2. air source; 3. vent; 4. valve body; 5. valve cavity; 6. membrane; 7. cover body; 8. opening; 9. blocking member; 10. positioning member; 11. clamping mechanism; 12. first driving member; 13. second driving member; 14. pressing block; 15. third driving member; 16. workbench; 17. transmission assembly; 18. connecting plate; 19. conduction rod; 20. guide sleeve; 21. connecting port. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0028] like Figures 1 to 6 As shown, a preferred embodiment of a gas proportional valve diaphragm installation stress relief mechanism is shown, comprising: a base 1 and a gas source 2, the base 1 having a longitudinally opened vent hole 3, a valve body 4 of the gas proportional valve is placed on the base 1, and the vent hole 3 is longitudinally connected with a valve cavity 5 in the gas proportional valve, a diaphragm 6 of the gas proportional valve is placed directly above the valve cavity 5 of the valve body 4, the gas source 2 is connected to the bottom of the vent hole 3, and the gas source 2 is inletted so that the diaphragm 6 placed on the valve body 4 is suspended and centered, and the diaphragm 6 in the centered state is pressed and installed on the valve body 4 through the cover body 7 of the gas proportional valve.

[0029] Furthermore, as a preferred embodiment, the valve body 4 of the gas proportional valve has two through-ports 8 communicating with the valve cavity 5 , and the through-ports 8 are blocked by blocking members 9 .

[0030] The utility model uses an air source 2 to blow air upwards to the membrane 6 in the assembly process, so that the membrane 6 is suspended in the middle. After the membrane 6 drops due to its own weight, it is in the middle position of the installation, and then the cover body 7 is installed, ensuring that the installation position of the membrane 6 is accurate, improving the sealing of the product, and improving the qualified rate of the product, which is suitable for mass production.

[0031] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.

[0032] The utility model also has the following implementation methods based on the above:

[0033] In further embodiments of the present invention, please continue to refer to Figures 1 to 6 As shown, the gas proportional valve diaphragm installation stress relief mechanism further includes: at least one pressing mechanism 11, the pressing mechanism 11 presses the cover body 7 longitudinally, thereby pressing the diaphragm 6 in the centered state.

[0034] In a further embodiment of the utility model, the clamping mechanism 11 includes: a first driving member 12, a second driving member 13 and a pressing block 14. The first driving member 12 is connected to the second driving member 13 and the pressing block 14 in a transmission connection so that the second driving member 13 and the pressing block 14 can move longitudinally. The second driving member 13 is connected to the pressing block 14 in a transmission connection so that the pressing block 14 can move horizontally, and the cover body 7 is clamped by the pressing block 14.

[0035] In a further embodiment of the utility model, the gas proportional valve diaphragm mounting stress relief mechanism further includes: two third driving members 15, and the two third driving members 15 are respectively connected to the two blocking members 9 in a transmission manner so that the blocking members 9 and the openings 8 are blocked and matched.

[0036] The clamping mechanism 11 and the third driving member 15 are provided to realize automatic clamping and improve production efficiency.

[0037] In a further embodiment of the utility model, at least two positioning members 10 are provided on the base 1, and the two positioning members 10 are positioned and matched with the valve body 4, so as to prevent the valve body 4 from tilting or shaking and improve the installation accuracy of the membrane 6.

[0038] In a further embodiment of the utility model, the gas proportional valve diaphragm mounting stress relief mechanism further includes: a workbench 16 , and the base 1 , the first driving member 12 , the third driving member 15 and the gas source 2 are all mounted on the workbench 16 .

[0039] In a further embodiment of the present invention, the first driving member 12 is transmission-connected to the second driving member 13 via a transmission assembly 17 .

[0040] In a further embodiment of the utility model, the transmission assembly 17 includes: a connecting plate 18 and a conduction rod 19, the connecting plate 18 is transmission-connected to the first driving member 12, one end of the conduction rod 19 is fixedly connected to the connecting plate 18, and the other end of the conduction rod 19 is fixedly connected to the second driving member 13.

[0041] The conducting rod 19 moves longitudinally.

[0042] In a further embodiment of the utility model, the transmission assembly 17 further includes: a guide sleeve 20 , the guide sleeve 20 is installed on the workbench 16 , the guide sleeve 20 is vertically arranged, and the conduction rod 19 slides through the guide sleeve 20 .

[0043] Improve the stability of the activity of the clamping mechanism 11.

[0044] In a further embodiment of the utility model, a connection port 21 is provided on the workbench 16 , the connection port 21 is connected to the vent hole 3 , and the air source 2 is connected to the connection port 21 .

[0045] In a further embodiment of the utility model, the gas proportional valve diaphragm installation stress relief mechanism comprises: two pressing mechanisms 11, and the two pressing mechanisms 11 are symmetrically arranged on the central axis of the diaphragm 6.

[0046] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas proportional valve diaphragm installation stress relief mechanism, characterized in that: include: A base, wherein the base has a vent hole longitudinally opened thereon, the valve body of the gas proportional valve is placed on the base, and the vent hole is longitudinally connected to the valve cavity in the gas proportional valve, and the membrane of the gas proportional valve is placed directly above the valve cavity of the valve body; An air source is connected to the bottom of the air vent, and the air source takes in air so that the membrane placed on the valve body is suspended and centered, and the membrane in the centered state is pressed and installed on the valve body through the cover body of the gas proportional valve.

2. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 1, characterized in that: The valve body of the gas proportional valve is provided with two through openings which are in communication with the valve cavity, and the through openings are blocked and fitted by blocking pieces.

3. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 2, characterized in that: Also includes: At least one pressing mechanism, the pressing mechanism longitudinally presses the cover body, thereby pressing the membrane in a centered state.

4. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 3, characterized in that: The clamping mechanism includes: a first driving member, a second driving member and a pressing block. The first driving member is connected to the second driving member and the pressing block in a transmission manner so that the second driving member and the pressing block can move longitudinally. The second driving member is connected to the pressing block in a transmission manner so that the pressing block can move horizontally. The cover body is clamped by the pressing block.

5. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 4, characterized in that: Also includes: Two third driving members are respectively connected to the two blocking members in a transmission manner so that the blocking members cooperate with the through openings for blocking.

6. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 1, characterized in that: At least two positioning members are arranged on the base, and the two positioning members are positioned and matched with the valve body.

7. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 5, characterized in that: Also includes: A workbench, the base, the first driving member, the third driving member and the air source are all installed on the workbench.

8. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 7, characterized in that: The first driving member is transmission-connected to the second driving member via a transmission assembly; The transmission assembly includes: a connecting plate and a transmission rod, the connecting plate is transmission-connected to the first driving member, one end of the transmission rod is fixedly connected to the connecting plate, and the other end of the transmission rod is fixedly connected to the second driving member.

9. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 8, characterized in that: The transmission assembly further comprises: a guide sleeve, the guide sleeve is mounted on the workbench, the guide sleeve is vertically arranged, and the conduction rod slides through the guide sleeve.

10. The gas proportional valve diaphragm mounting stress relief mechanism according to claim 7, characterized in that: The workbench is provided with a connecting port, the connecting port is connected to the vent hole, and the air source is connected to the connecting port.

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