A diaphragm valve and diaphragm transmission mechanism thereof

Abstract

The present application discloses a diaphragm valve and its diaphragm transmission mechanism, which relate to the field of diaphragm valves. The present application discloses a diaphragm valve and its diaphragm transmission mechanism, wherein the diaphragm valve comprises a valve body, a flow channel, a diaphragm and a first drive module, and the diaphragm transmission mechanism comprises a transmission seat and a transmission rod, wherein an annular transmission groove is provided at one end of the transmission seat close to the diaphragm, and the transmission groove comprises a first groove body and a second groove body connected to each other, and the depth of the first groove body is less than the depth of the second groove body; the transmission rod comprises a first end connected to the diaphragm, and a second end movable in the transmission groove in the circumferential direction of the transmission groove, and the second end respectively contacts the bottom of the first groove body and the bottom of the second groove body during the rotation of the transmission seat. The diaphragm transmission mechanism of the present application can drive the diaphragm to reciprocate and open and close the flow channel under the cooperation of the transmission seat, the transmission groove and the transmission rod, and no redundant transmission structure is required, which greatly reduces the volume of the diaphragm valve and facilitates its assembly with other mechanisms.

Description

Technical Field

[0001] The present application relates to the field of diaphragm valves, and in particular to a diaphragm valve and a diaphragm transmission mechanism thereof. Background Art

[0002] The diaphragm valve is a stop valve that uses a diaphragm as an opening and closing member to close the flow channel and cut off the fluid. The diaphragm valve in the prior art includes a valve body, a flow channel opened in the valve body, a movable diaphragm arranged in the valve body, and a driving member for driving the diaphragm to move. The driving member drives the diaphragm to move and block or open the flow channel in the valve body, thereby realizing the opening and closing of the diaphragm valve.

[0003] However, the diaphragm valve in the prior art usually needs to set a redundant transmission structure between the driving member and the diaphragm, and use an optical coupling element to detect the open and closed state of the diaphragm valve. However, the redundant transmission structure will occupy a large installation space, resulting in a large volume of the diaphragm valve, which is not conducive to its assembly with other mechanisms; and the use of an optical coupling element to detect the diaphragm position has low detection accuracy and high detection costs. Utility Model Content

[0004] One object of the present application is to overcome the deficiencies of the prior art and provide a diaphragm transmission mechanism for a diaphragm valve.

[0005] The present application provides a diaphragm transmission mechanism adopting the following technical solution:

[0006] A diaphragm transmission mechanism of a diaphragm valve, the diaphragm valve comprising a valve body, a flow channel opened in the valve body, a diaphragm movably arranged in the valve body for opening or closing the flow channel, and a first driving module for driving the diaphragm to move, the diaphragm transmission mechanism being arranged on the valve body and between the diaphragm and the first driving module, and comprising:

[0007] A transmission seat, the transmission seat is rotatable around its own axis and the extension direction of its rotation axis is the same as the activity direction of the diaphragm, the first driving module is used to drive the transmission seat to rotate, and an annular transmission groove is formed at one end of the transmission seat close to the diaphragm, the transmission groove includes a first groove body and a second groove body connected to each other, and the depth of the first groove body is less than the depth of the second groove body;

[0008] A transmission rod having a first end connected to the diaphragm and a second end movable in the transmission groove in a circumferential direction of the transmission groove, wherein the second end respectively contacts the bottom of the first groove body and the bottom of the second groove body during the rotation of the transmission seat.

[0009] By adopting the above technical solution, the diaphragm can reciprocate and open and close the flow channel with the cooperation of the transmission seat, transmission groove and transmission rod, without setting up redundant transmission structure, which greatly reduces the volume of the diaphragm valve and facilitates its assembly with other mechanisms.

[0010] In a specific feasible implementation manner, the first trough body and the second trough body are respectively located on opposite sides of the transmission trough, and the transmission trough also includes two oppositely arranged third trough bodies, each of the third trough bodies is respectively connected to the first trough body and the second trough body at both ends and the depth thereof gradually increases along the direction from the first trough body to the second trough body.

[0011] By adopting the above technical solution, the transmission rod can achieve a smooth transition between the first groove body and the second groove body through the third groove body, which effectively improves the transmission effect of the transmission rod on the diaphragm.

[0012] In a specific possible implementation scheme, the diaphragm transmission mechanism also includes a first fixed seat arranged on the valve body, and a rotating cavity opened in the first fixed seat, the transmission seat is accommodated in the rotating cavity, and a transmission hole is opened at one end of the first fixed seat close to the valve body, and the first end is movably arranged in the transmission hole along its axial direction.

[0013] By adopting the above technical solution, the transmission hole can serve as a transmission guide for the transmission rod, effectively preventing the transmission rod from shifting during the movement, and improving the opening and closing effect of the diaphragm on the flow channel.

[0014] In a specific implementation scheme, the first driving module is a motor, and a mounting plate for mounting the motor is provided at one end of the first fixing seat away from the valve body, and the output shaft of the motor passes through the mounting plate and the first fixing seat in sequence and is coaxially connected to the transmission seat.

[0015] In a specific feasible implementation scheme, two parallel detection grooves are provided in the transmission seat, each of the detection grooves is provided with a movable ejector pin and a second driving module for driving the ejector pin to move, the two detection grooves include a first detection groove and a second detection groove, one end of the first detection groove has a first detection port for the ejector pin to pass through, one end of the second detection groove has a second detection port for the ejector pin to pass through, the first detection port and the second detection port are arranged opposite to each other, and a first sensing terminal and a second sensing terminal are respectively arranged on the cavity wall on one side in the same direction of the rotating cavity, the projection of the first sensing terminal on the transmission seat is located on the rotation path of the first detection port, and the projection of the second sensing terminal on the transmission seat is located on the rotation path of the second detection port.

[0016] By adopting the above technical solution, the opening and closing state of the diaphragm valve can be accurately detected with high detection accuracy and low detection cost.

[0017] In a specific implementation scheme, the first detection slot and the second detection slot respectively penetrate the transmission seat along a first direction, the first slot body and the second slot body are arranged along a second direction, and the first direction is perpendicular to the second direction.

[0018] In a specific implementation scheme, the second driving module is a spring disposed in the detection slot, one end of the spring is internally connected to the detection slot, and the other end of the spring is connected to the ejector pin.

[0019] By adopting the above technical solution, the ejector pin can contact the first sensing terminal or the second sensing terminal under the elastic force of the spring, which effectively improves the detection effect of the first sensing terminal and the second sensing terminal on the rotation state of the transmission seat.

[0020] In a specific feasible implementation scheme, the diaphragm transmission mechanism also includes a second fixed seat whose two ends are respectively connected to the valve body and the first fixed seat, a slide groove running through the second fixed seat, and a slider slidably arranged in the slide groove, the length direction of the slide groove is the same as the moving direction of the diaphragm, and the two ends of the slider are respectively coaxially connected to the diaphragm and the transmission rod.

[0021] By adopting the above technical solution, the diaphragm can move smoothly under the drive of the slider, effectively avoiding the displacement of the diaphragm during the movement, and improving the opening and closing effect of the diaphragm on the flow channel.

[0022] Another object of the present application is to provide a diaphragm valve.

[0023] The diaphragm valve provided in this application adopts the following technical solution:

[0024] A diaphragm valve comprises a valve body and a flow channel opened in the valve body. The diaphragm valve also comprises a diaphragm unit arranged on the valve body, the diaphragm unit comprises a valve groove opened on the valve body, a valve port opened in the valve groove and connected to the flow channel, a diaphragm movably arranged in the valve groove for covering the valve port, the diaphragm transmission mechanism as described above for driving the diaphragm to move, and a first drive module for driving the diaphragm transmission mechanism.

[0025] By adopting the above technical solution, the diaphragm can reciprocate and open and close the flow channel with the cooperation of the transmission seat, transmission groove and transmission rod, without setting up redundant transmission structure, which greatly reduces the volume of the diaphragm valve and facilitates its assembly with other mechanisms.

[0026] In a specific possible implementation scheme, the flow channel includes a first flow channel and a second flow channel that are interconnected, there are multiple diaphragm units, and the multiple valve grooves constituting the multiple diaphragm units are all connected to the second flow channel through their respective valve ports, and the flow channel also includes multiple third flow channels that correspond one-to-one to the multiple valve grooves and are interconnected.

[0027] By adopting the above technical solution, multiple diaphragm units can realize flow path switching of multiple third flow channels, thereby improving the use range of the diaphragm valve.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] The diaphragm transmission mechanism of the present application, the transmission seat, transmission groove and transmission rod thereon can cooperate with each other and drive the diaphragm to reciprocate, and there is no need to set up a redundant transmission structure, which greatly reduces the volume of the diaphragm valve and facilitates its assembly with other mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the diaphragm valve of an embodiment of the present application.

[0031] Figure 2 It is a schematic diagram of the structure of the valve body of an embodiment of the present application.

[0032] Figure 3 yes Figure 2 Side view of.

[0033] Figure 4 yes Figure 2 Schematic diagram of the AA section in.

[0034] Figure 5 It is a front view of the diaphragm transmission mechanism of an embodiment of the present application.

[0035] Figure 6 yes Figure 5 Schematic diagram of the BB cross section.

[0036] Figure 7 It is a left view of the diaphragm transmission mechanism of an embodiment of the present application.

[0037] Figure 8 yes Figure 7 Schematic diagram of the CC section.

[0038] Fig. 9 yes Figure 7 Schematic diagram of the DD section.

[0039] Description of reference numerals:

[0040] 1. Valve body; 2. Flow channel; 21. First flow channel; 22. Second flow channel; 23. Third flow channel; 3. Diaphragm; 4. First drive module; 5. Transmission seat; 51. Detection slot; 511. First detection slot; 512. Second detection slot; 513. First detection port; 514. Second detection port; 6. Transmission slot; 61. First slot body; 62. Second slot body; 63. Third slot body; 7. Transmission rod; 71. First end; 72. Second end; 8. First fixed seat; 81. Rotating cavity; 82. Transmission hole; 9. Mounting plate; 10. Ejector pin; 11. Second drive module; 12. First sensing terminal; 13. Second sensing terminal; 14. Second fixed seat; 141. Slide slot; 15. Sliding block; 16. Valve slot; 17. Valve port. DETAILED DESCRIPTION

[0041] The present application is further described in detail below in conjunction with the accompanying drawings.

[0042] See also Figure 1-9 As shown, a diaphragm valve is shown, including a valve body 1, a flow channel 2 opened in the valve body 1, and a diaphragm unit arranged on the valve body 1, the diaphragm unit includes a valve groove 16 opened on the valve body 1, a valve port 17 opened in the valve groove 16 and connected to the flow channel 2, a diaphragm 3 movably arranged in the valve groove 16 for covering the valve port 17, a diaphragm transmission mechanism for driving the diaphragm 3 to move, and a first driving module 4 for driving the diaphragm transmission mechanism.

[0043] Among them, combined Figure 2 and Figure 4 As shown, the flow channel 2 includes a first flow channel 212, a second flow channel 222 and three third flow channels 232. The first flow channel 212 and the second flow channel 222 are perpendicular to each other and connected. There are three diaphragm units. The three valve grooves 16 constituting the three diaphragm units are connected to the second flow channel 222 through their respective valve ports 17. The three third flow channels 232 correspond to the three valve grooves 16 one by one and are connected to each other.

[0044] like Figure 5-9 As shown, the diaphragm transmission mechanism is arranged on the valve body 1 and located between the diaphragm 3 and the first driving module 4, and includes:

[0045] The transmission seat 5 is rotatable around its own axis and the extension direction of the rotation axis is the same as the activity direction of the diaphragm 3. The first driving module 4 is used to drive the transmission seat 5 to rotate. The transmission seat 5 is provided with an annular transmission groove 6 at one end close to the diaphragm 3. The transmission groove 6 includes a first groove body 61 and a second groove body 62 which are connected to each other. The depth of the first groove body 61 is less than the depth of the second groove body 62.

[0046] The transmission rod 7 has a first end 71 connected to the diaphragm 3, and a second end 72 that is movable in the transmission groove 6 around the circumferential direction of the transmission groove 6. The second end 72 respectively contacts the bottom of the first groove body 61 and the bottom of the second groove body 62 during the rotation of the transmission seat 5.

[0047] Among them, the first driving module 4 is a motor, and its output shaft is coaxially connected with the transmission seat 5. When working, the motor is started, the motor drives the transmission seat 5 to rotate, the transmission seat 5 drives the transmission slot 6 to rotate, and the transmission rod 7 reciprocates along the direction from the transmission seat 5 to the valve body 1 during the relative rotation with the transmission slot 6. Specifically, when the second end 72 contacts the bottom of the first slot body 61, the first end 71 drives the diaphragm 3 to cover the valve port 17; when the second end 72 contacts the bottom of the second slot body 62, the first end 71 drives the diaphragm 3 to separate from the valve port 17. In this way, the diaphragm 3 can reciprocate and open and close the flow channel 2 under the cooperation of the transmission seat 5, the transmission slot 6 and the transmission rod 7, and there is no need to set up a redundant transmission structure, which greatly reduces the volume of the diaphragm valve and facilitates its assembly with other mechanisms.

[0048] In this embodiment, combined with Figure 6 As shown, the first slot body 61 and the second slot body 62 are respectively located on opposite sides of the transmission slot 6, and the transmission slot 6 also includes two third slot bodies 63 arranged opposite to each other, and the two ends of each third slot body 63 are respectively connected with the first slot body 61 and the second slot body 62, and the depth thereof gradually increases along the direction from the first slot body 61 to the second slot body 62. When the second end 72 moves relative to the third slot body 63 along the direction from the first slot body 61 to the second slot body 62, the first end 71 drives the diaphragm 3 to gradually separate from the valve port 17; and when the second end 72 moves relative to the third slot body 63 along the direction from the second slot body 62 to the first slot body 61, the first end 71 drives the diaphragm 3 to gradually approach the valve port 17. The third slot body 63 can realize the smooth transition of the transmission rod 7 between the first slot body 61 and the second slot body 62, and effectively improve the transmission effect of the transmission rod 7 on the diaphragm 3.

[0049] Combination Figure 8As shown, the diaphragm transmission mechanism also includes a second fixed seat 14 bolted to the valve body 1, a slide groove 141 penetrating the second fixed seat 14, a slider 15 slidably arranged in the slide groove 141, a first fixed seat 8 bolted to the second fixed seat 14, and a rotating cavity 81 for accommodating the transmission seat 5 provided in the first fixed seat 8, wherein the length direction of the slide groove 141 is the same as the moving direction of the diaphragm 3, one end of the slider 15 is coaxially connected to the diaphragm 3, a transmission hole 82 is provided at one end of the first fixed seat 8 close to the valve body 1, and the first end 71 is movably arranged in the transmission hole 82 along its axial direction and is coaxially connected to the slider 15. The first fixed seat 8 and the second fixed seat 14 are both cylindrical, the slider 15 is coaxially arranged with the second fixed seat 14, and the transmission seat 5 is coaxially arranged with the first fixed seat 8.

[0050] In this way, the diaphragm 3 can move smoothly under the drive of the slider 15, effectively preventing the diaphragm 3 from shifting during the movement; at the same time, the transmission hole 82 can serve as a transmission guide for the transmission rod 7, effectively preventing the transmission rod 7 from shifting during the movement.

[0051] In this embodiment, a mounting plate 9 for mounting the motor is provided at one end of the first fixing seat 8 away from the valve body 1 , and the output shaft of the motor passes through the mounting plate 9 and the first fixing seat 8 in sequence and is coaxially connected to the transmission seat 5 .

[0052] In this embodiment, combined with Fig. 9 As shown, two parallel detection slots 51 are provided in the transmission seat 5, each detection slot 51 is provided with a movable ejector pin 10 and a second driving module 11 for driving the ejector pin 10 to move, the two detection slots 51 include a first detection slot 511 and a second detection slot 512, one end of the first detection slot 511 has a first detection port 513 for the ejector pin 10 to pass through, one end of the second detection slot 512 has a second detection port 514 for the ejector pin 10 to pass through, the first detection port 513 and the second detection port 514 are arranged opposite to each other, and the first sensing terminal 12 and the second sensing terminal 13 are respectively arranged on the cavity wall on one side in the same direction of the rotating cavity 81, the projection of the first sensing terminal 12 on the transmission seat 5 is located on the rotation path of the first detection port 513, and the projection of the second sensing terminal 13 on the transmission seat 5 is located on the rotation path of the second detection port 514. In this way, the opening and closing state of the diaphragm valve can be accurately detected by the cooperation of the ejector pin 10 and the sensing terminal in the detection slot 51, with high detection accuracy and low detection cost.

[0053] Among them, the first detection groove 511 and the second detection groove 512 respectively penetrate the transmission seat 5 along the first direction, the first groove body 61 and the second groove body 62 are arranged along the second direction, and the first direction and the second direction are perpendicular to each other; the first sensor terminal 12 and the second sensor terminal 13 are both detection terminals of the proximity sensor, and the proximity sensor can output a detection signal when the ejector pin 10 conflicts with the detection terminal; the second driving module 11 is a spring arranged in the detection groove 51, one end of the spring is connected to the detection groove 51, and the other end is connected to the ejector pin 10.

[0054] Specifically, the transmission seat 5 has a first position and a second position during the rotation process. When the transmission seat 5 is in the first position, the second end 72 of the transmission rod 7 abuts against the bottom of the first slot body 61, and the first end 71 drives the diaphragm 3 to cover the valve port 17. At this time, the first detection port 513 is opposite to the first sensor terminal 12, and the ejector pin 10 in the first detection slot 511 abuts against the first sensor terminal 12 under the action of the spring, and the first sensor terminal 12 outputs a signal that the diaphragm valve is closed; when the transmission seat 5 is in the second position, the second end 72 of the transmission rod 7 abuts against the bottom of the second slot body 62, and the first end 71 drives the diaphragm 3 to disengage from the valve port 17. At this time, the second detection port 514 is opposite to the second sensor terminal 13, and the ejector pin 10 in the second detection slot 512 abuts against the second sensor terminal 13 under the action of the spring, and the second sensor terminal 13 outputs a signal that the diaphragm valve is open.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A diaphragm transmission mechanism of a diaphragm valve, the diaphragm valve comprising a valve body (1), a flow channel (2) provided in the valve body (1), a diaphragm (3) movably provided in the valve body (1) for opening or closing the flow channel (2), and a first driving module (4) for driving the diaphragm (3) to move, characterized in that: The diaphragm transmission mechanism is arranged on the valve body (1) and is located between the diaphragm (3) and the first driving module (4), and comprises: A transmission seat (5), the transmission seat (5) is rotatably arranged around its own axis centerline direction and the extension direction of its rotation axis is the same as the activity direction of the diaphragm (3), the first driving module (4) is used to drive the transmission seat (5) to rotate, and an annular transmission groove (6) is formed at one end of the transmission seat (5) close to the diaphragm (3), and the transmission groove (6) includes a first groove body (61) and a second groove body (62) which are connected to each other, and the depth of the first groove body (61) is less than the depth of the second groove body (62); A transmission rod (7), the transmission rod (7) comprising a first end portion (71) connected to the diaphragm (3), and a second end portion (72) disposed in the transmission groove (6) and movable in a circumferential direction of the transmission groove (6), wherein the second end portion (72) respectively contacts the bottom of the first groove body (61) and the bottom of the second groove body (62) during the rotation of the transmission seat (5).

2. The diaphragm transmission mechanism of a diaphragm valve according to claim 1, characterized in that: The first groove body (61) and the second groove body (62) are respectively located on two opposite sides of the transmission groove (6); the transmission groove (6) further comprises two third groove bodies (63) arranged opposite to each other; two ends of each third groove body (63) are respectively connected to the first groove body (61) and the second groove body (62), and the depth thereof gradually increases along the direction from the first groove body (61) to the second groove body (62).

3. A diaphragm transmission mechanism for a diaphragm valve according to claim 1 or 2, characterized in that: The diaphragm transmission mechanism also includes a first fixed seat (8) arranged on the valve body (1), a rotating chamber (81) opened in the first fixed seat (8), the transmission seat (5) is accommodated in the rotating chamber (81), and a transmission hole (82) is opened at one end of the first fixed seat (8) close to the valve body (1), and the first end (71) is movably inserted into the transmission hole (82) along its axial direction.

4. The diaphragm transmission mechanism of a diaphragm valve according to claim 3, characterized in that: The first driving module (4) is a motor, and a mounting plate (9) for mounting the motor is provided at one end of the first fixing seat (8) away from the valve body (1), and the output shaft of the motor passes through the mounting plate (9) and the first fixing seat (8) in sequence and is coaxially connected to the transmission seat (5).

5. The diaphragm transmission mechanism of a diaphragm valve according to claim 3, characterized in that: The transmission seat (5) is provided with two mutually parallel detection grooves (51), each of the detection grooves (51) is provided with a movable ejector pin (10) and a second driving module (11) for driving the ejector pin (10) to move, the two detection grooves (51) include a first detection groove (511) and a second detection groove (512), one end of the first detection groove (511) has a first detection opening (513) for the ejector pin (10) to pass through, and one end of the second detection groove (512) has a first detection opening (513) for the ejector pin (10) to pass through. A second detection port (514) is formed through the first detection port (513) and the second detection port (514) are arranged opposite to each other, and a first sensing terminal (12) and a second sensing terminal (13) are respectively arranged on one side of the cavity wall in the same direction of the rotating cavity (81), and the projection of the first sensing terminal (12) on the transmission seat (5) is located on the rotation path of the first detection port (513), and the projection of the second sensing terminal (13) on the transmission seat (5) is located on the rotation path of the second detection port (514).

6. The diaphragm transmission mechanism of a diaphragm valve according to claim 5, characterized in that: The first detection slot (511) and the second detection slot (512) respectively penetrate the transmission seat (5) along a first direction, the first slot body (61) and the second slot body (62) are arranged along a second direction, and the first direction is perpendicular to the second direction.

7. The diaphragm transmission mechanism of a diaphragm valve according to claim 5, characterized in that: The second driving module (11) is a spring arranged in the detection slot (51), one end of the spring is internally connected to the detection slot (51), and the other end is connected to the ejector pin (10).

8. The diaphragm transmission mechanism of a diaphragm valve according to claim 3, characterized in that: The diaphragm transmission mechanism also includes a second fixed seat (14) whose two ends are respectively connected to the valve body (1) and the first fixed seat (8), a slide groove (141) penetrating the second fixed seat (14), and a slider (15) slidably arranged in the slide groove (141), wherein the length direction of the slide groove (141) is the same as the moving direction of the diaphragm (3), and the two ends of the slider (15) are respectively coaxially connected to the diaphragm (3) and the transmission rod (7).

9. A diaphragm valve, comprising a valve body (1) and a flow channel (2) provided in the valve body (1), characterized in that: The diaphragm valve also includes a diaphragm unit arranged on the valve body (1), and the diaphragm unit includes a valve groove (16) opened on the valve body (1), a valve port (17) opened in the valve groove (16) and connected to the flow channel (2), a diaphragm (3) movably arranged in the valve groove (16) for covering the valve port (17), a diaphragm transmission mechanism as described in any one of claims 1 to 8 for driving the diaphragm (3) to move, and a first driving module (4) for driving the diaphragm transmission mechanism.

10. A diaphragm valve according to claim 9, characterized in that: The flow channel (2) includes a first flow channel (21) and a second flow channel (22) which are interconnected. There are multiple diaphragm units. The multiple valve grooves (16) constituting the multiple diaphragm units are all connected to the second flow channel (22) through their respective valve ports (17). The flow channel (2) also includes multiple third flow channels (23) which correspond one-to-one to the multiple valve grooves (16) and are interconnected.

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