Pneumatic regulating valve

Abstract

The application relates to the technical field of regulating valves, and discloses a pneumatic regulating valve which comprises a valve body, a valve core, a valve cover, a pneumatic actuator, a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is square, a filtering device is installed on the liquid inlet pipe, the filtering device comprises a first through hole, a filtering plate, a vertical plate installed on the top wall of the liquid inlet pipe, a horizontal plate fixed to one side of the vertical plate and a strip-shaped hole formed in the horizontal plate, a sliding seat is slidably connected in the strip-shaped hole, a first air cylinder is installed on one side of the vertical plate, a piston rod of the first air cylinder is fixed to one side of the sliding seat, a second air cylinder is fixed to the top of the sliding seat, a connecting plate is fixed to the piston rod of the second air cylinder, a sealing plate is fixed to the bottom of the connecting plate, the top of the filtering plate penetrates through the sealing plate and is fixed to the bottom of the connecting plate, a first insertion slot for inserting the bottom of the filtering plate is formed in the inner wall of the liquid inlet pipe, and a cleaning mechanism for cleaning the filtering plate is installed on the vertical plate. The application is convenient for filtering the liquid inlet pipe.

Description

Technical Field

[0001] This application relates to the technical field of control valves, and in particular to a pneumatic control valve. Background Technology

[0002] Currently, publicly known pneumatic control valves use compressed gas as a power source, a cylinder as an actuator, and are driven by valve positioners, converters, and other accessories to achieve on / off or proportional regulation. They receive control signals from industrial automation control systems to regulate various process parameters such as flow rate, pressure, temperature, and liquid level of pipeline media.

[0003] Existing pneumatic control valves generally include a valve body, a valve core, a valve cover, and a pneumatic actuator; the pneumatic actuator is used to drive the valve core to move; the valve body has an inlet pipe and an outlet pipe on both sides, and the two ends of the inlet pipe and the outlet pipe are connected to external pipes through pipes and flanges, respectively.

[0004] However, existing technology makes it inconvenient to filter the inlet pipe, which allows some solid objects to easily enter the valve body along with the liquid medium, potentially damaging the valve core. Summary of the Invention

[0005] To facilitate filtration in the inlet pipe, this application provides a pneumatic regulating valve, employing the following technical solution:

[0006] A pneumatic regulating valve includes a valve body, a valve core, a valve cover, a pneumatic actuator, an inlet pipe, and an outlet pipe. The inlet pipe is square and a filter device is installed on it. The filter device includes a first through hole at the top of the inlet pipe, a filter plate slidably connected to the first through hole, a vertical plate installed on the top wall of the inlet pipe, a horizontal plate fixed to one side of the vertical plate, and a strip-shaped hole in the horizontal plate. A slide block is slidably connected in the strip-shaped hole. A first cylinder is installed on one side of the vertical plate, and the piston rod of the first cylinder is fixed to one side of the slide block. A second cylinder is fixed to the top of the slide block, and a connecting plate is fixed to the piston rod of the second cylinder. A sealing plate is fixed to the bottom of the connecting plate. The top of the filter plate passes through the sealing plate and is fixed to the bottom of the connecting plate. A first slot for inserting the bottom of the filter plate is provided on the inner wall of the inlet pipe. A cleaning mechanism for cleaning the filter plate is installed on the vertical plate.

[0007] By adopting the above technical solution, the filter plate is designed to facilitate the filtration of the inlet pipe. When the filter plate needs to be cleaned, the connecting plate is first driven to move upward by the piston rod of the second cylinder. The upward movement of the connecting plate drives the filter plate to move upward. Then, the sliding block is driven to move closer to the vertical plate by the piston rod of the first cylinder. This allows the filter plate to be misaligned with the first through hole. Then, the filter plate is cleaned by the cleaning mechanism.

[0008] Optionally, the cleaning mechanism includes a vertical groove formed in the vertical plate, a horizontal shaft rotatably connected to the side wall of the vertical groove, and a rotating plate vertically fixed to the horizontal shaft; a drive assembly for driving the horizontal shaft to rotate is installed in the vertical groove; and a vibration assembly for vibrating the filter plate is installed on the rotating plate.

[0009] By adopting the above technical solution, when the filter plate needs to be cleaned, the horizontal shaft is first driven to rotate by the drive component, and the rotation of the horizontal shaft drives the rotating plate to rotate, so that the rotating plate is in a horizontal state. Then, the vibrating component makes the vibrating plate vibrate, thereby cleaning the filter plate. In summary, the cleaning mechanism is designed to facilitate the cleaning of the filter plate.

[0010] Optionally, the vibration assembly includes a micro motor mounted on one side of the rotating plate and a cam rotatably mounted on the other side of the rotating plate; the output shaft of the micro motor passes through the rotating plate and is eccentrically connected to the cam; a first mounting bracket is fixedly connected to one side of the rotating plate, an impact rod is slidably connected to the first mounting bracket, a reset block is fixedly connected to one side of the impact rod, and a first reset spring is provided between the reset block and the first mounting bracket; one end of the impact rod abuts against the circumferential surface of the cam, and the other end can abut against the filter plate.

[0011] By adopting the above technical solution, when it is necessary to vibrate the filter plate, the micro motor is first started. At this time, the output shaft of the micro motor drives the cam to rotate. The rotation of the cam drives the impact rod to move away from the cam. The movement of the impact rod away from the cam causes the reset block to move away from the cam. At this time, the reset block presses against the first reset spring, which enables the impact rod to move back and forth. When the cam rotates rapidly, it enables the impact rod to move back and forth rapidly, thereby vibrating the filter plate. In summary, the vibration component is designed to facilitate the vibration of the filter plate.

[0012] Optionally, the driving assembly includes a horizontal groove formed in the side wall of the vertical groove, a first guide rod fixed to the horizontal groove, a first sliding sleeve slidably connected to the first guide rod, a first baffle fixed to one end of the first guide rod, and a first return spring disposed between the first sliding sleeve and the first baffle; a rack is fixedly connected to the bottom of the first sliding sleeve, and a gear is fixedly connected to one end of the horizontal shaft, the gear meshing with the rack; a transmission mechanism for driving the rack to move is installed in the vertical groove.

[0013] By adopting the above technical solution, when it is necessary to drive the horizontal shaft to rotate, the rack is first driven to move through the transmission mechanism, the rack moves to drive the gear to rotate, and the gear rotates to drive the horizontal shaft to rotate; in summary, the set drive component facilitates the rotation of the horizontal shaft.

[0014] Optionally, the transmission mechanism includes a second mounting bracket fixed to one side of the vertical slot, a second guide rod fixed to the second mounting bracket, a second sliding sleeve slidably connected to the second guide rod, and a second return spring installed between the second sliding sleeve and the second mounting bracket; a drive plate is fixedly connected to one side of the second sliding sleeve, and a drive block is fixedly connected to the side of the drive plate near the rack; a first inclined surface is provided on the top of the rack, and the first inclined surface matches the side wall of the drive block; a through hole is provided on the top of the vertical slot, and a push plate is slidably connected in the through hole; a second inclined surface is provided on the opposite inner side of the push plate and the drive plate, and the two second inclined surfaces match; a third guide rod is slidably provided on the vertical plate, the third guide rod passes through the vertical plate, a second baffle is fixedly connected to one end of the third guide rod, and a third return spring is provided between the second baffle and the vertical plate; the top of the second baffle is fixedly connected to the bottom of the push plate, and a push rod is fixedly connected to one side of the connecting plate, the push rod abutting against one end of the push plate.

[0015] By adopting the above technical solution, when the piston rod of the first cylinder drives the slide block to move closer to the vertical plate, the slide block drives the push rod to move closer to the vertical plate. The push rod moves closer to the vertical plate, driving the push plate to move. Then, under the action of the second inclined plane, the push plate drives the drive plate to move downward. The drive plate moves downward, driving the drive block to move downward. Then, under the action of the first inclined plane, the drive block can drive the rack to move. In summary, the transmission mechanism is designed to facilitate the movement of the rack.

[0016] Optionally, a receiving mechanism is installed at the top of the liquid inlet pipe. The receiving mechanism includes a first dovetail groove formed at the top of the liquid inlet pipe, a first dovetail plate slidably connected to the first dovetail groove, and a fourth return spring fixed to one side of the first dovetail plate. The end of the fourth return spring away from the first dovetail plate is fixed to the inner wall of one end of the first dovetail groove. A blocking seat is fixed to the top of the first dovetail plate, and the blocking seat can be positioned above the first through hole. A second slot is formed at the top of the blocking seat, and a receiving box is inserted into the second slot. A vertical block is fixed to the top of the blocking seat, and a connecting rod is hinged between the vertical block and the drive plate.

[0017] By adopting the above technical solution, when the drive plate moves downward, the drive plate drives the connecting rod to move, and the connecting rod moves the blocking seat to move closer to the first through hole. This can block the first through hole, thereby reducing the amount of debris cleaned off the filter plate from entering the liquid inlet pipe through the first through hole. In addition, the movement of the blocking seat closer to the first through hole causes the receiving box to move downward to the filter plate, which facilitates the receiving box to collect the debris cleaned off the filter plate.

[0018] Optionally, a protective device for protecting the filtration device is installed at the top of the inlet pipe.

[0019] By adopting the above technical solution, the protective device can be easily protected.

[0020] Optionally, the protective device includes a second dovetail groove at the top of the inlet pipe, a second dovetail plate slidably connected to the second dovetail groove, and a fifth return spring fixed to one side of the second dovetail plate; the end of the fifth return spring away from the second dovetail plate is fixed to the inner wall of one end of the second dovetail groove; a protective cover is fixed to the top of the second dovetail plate, a pull rod is fixed to one side of the protective cover, and the protective cover is fully open on one side and at the bottom; the protective cover has a second through hole for the cylinder body of the first cylinder to slide and a notch for the cylinder body of the second cylinder to slide; a horizontal rod is installed on the cylinder body of the second cylinder, and the horizontal rod abuts against the side of the protective cover away from its opening.

[0021] By adopting the above technical solution, the protective cover is designed to protect the filter device; the horizontal bar is designed to drive the protective cover away from the filter device, which facilitates the observation of the cleaning of the filter plate; the second dovetail plate and the fifth return spring are designed to facilitate the reset of the protective cover; and the pull rod is designed to facilitate the manual driving of the protective cover.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The filter plate is designed to facilitate filtration of the inlet pipe. When the filter plate needs to be cleaned, the connecting plate is first moved upward by the piston rod of the second cylinder, which in turn moves the filter plate upward. Then, the sliding block is moved closer to the vertical plate by the piston rod of the first cylinder, which makes the filter plate misaligned with the first through hole. The filter plate is then cleaned by the cleaning mechanism.

[0024] 2. When vibration of the filter plate is required, the micro motor is first started. The output shaft of the micro motor drives the cam to rotate. The rotation of the cam drives the impact rod to move away from the cam. The movement of the impact rod away from the cam causes the reset block to move away from the cam. At this time, the reset block presses against the first reset spring, which enables the impact rod to move back and forth. When the cam rotates rapidly, it enables the impact rod to move back and forth rapidly, thereby vibrating the filter plate. In summary, the vibration component is designed to facilitate the vibration of the filter plate.

[0025] 3. The protective cover is designed to protect the filter device; the horizontal bar allows the protective cover to be moved away from the filter device, facilitating the observation of the filter plate during cleaning; the second dovetail plate and the fifth return spring facilitate the reset of the protective cover; and the pull rod allows for manual movement of the protective cover. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0027] Figure 2 This is a schematic diagram highlighting the filtering device and the protective device in the embodiments of this application.

[0028] Figure 3 This is a schematic diagram highlighting the cleaning mechanism in the embodiments of this application.

[0029] Figure 4 This is a schematic diagram highlighting the vibration component and the drive component in the embodiments of this application.

[0030] Figure 5 This is a schematic diagram of the material receiving mechanism highlighted in the embodiments of this application.

[0031] Reference numerals: 1. Valve body; 11. Valve cover; 12. Pneumatic actuator; 13. Inlet pipe; 131. First slot; 14. Outlet pipe; 2. Filter device; 21. First through hole; 22. Filter plate; 23. Vertical plate; 24. Horizontal plate; 241. Strip hole; 25. Slide seat; 26. First cylinder; 27. Second cylinder; 28. Connecting plate; 29. ​​Sealing plate; 3. Cleaning mechanism; 31. Vertical groove; 32. Horizontal shaft; 33. Rotating plate; 4. Vibration assembly; 41. Micro motor; 42. Cam; 43. First mounting bracket; 44. Impact rod; 45. Reset block; 46. First reset spring; 5. Drive assembly; 51. Horizontal groove; 52. First guide rod; 53. First sliding sleeve; 54. First baffle; 55. Horizontal spring; 56. Rack; 561 57. Gear; 6. Transmission mechanism; 61. Second mounting bracket; 62. Second guide rod; 63. Second sliding sleeve; 64. Second return spring; 65. Drive plate; 651. Drive block; 66. Through hole; 67. Push plate; 671. Second inclined plane; 68. Third guide rod; 681. Second baffle; 682. Third return spring; 69. Push rod; 70. Receiving mechanism; 71. First dovetail groove; 72. First dovetail plate; 73. Fourth return spring; 74. Blocking seat; 741. Second slot; 75. Receiving box; 76. Vertical block; 77. Connecting rod; 81. Protective device; 82. Second dovetail groove; 83. Second dovetail plate; 84. Fifth return spring; 85. Protective cover; 841. Second through hole; 842. Notch; 86. Pull rod; 87. Horizontal rod. Detailed Implementation

[0032] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0033] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] This application discloses a pneumatic regulating valve, as shown in the embodiments below. Figure 1 It includes a valve body 1, a valve core, a valve cover 11, a pneumatic actuator 12, an inlet pipe 13 and an outlet pipe 14. The inlet pipe 13 is square and a filter device 2 is installed on the inlet pipe 13.

[0035] Reference Figure 2 and Figure 3 The filter device 2 includes a first through hole 21 at the top of the liquid inlet pipe 13, a filter plate 22 slidably connected to the first through hole 21, a vertical plate 23 vertically installed on the top wall of the liquid inlet pipe 13, a horizontal plate 24 horizontally fixed to one side of the vertical plate 23, and a strip hole 241 opened in the horizontal plate 24; a slide block 25 is slidably connected in the horizontal direction in the strip hole 241, and a first cylinder 26 is horizontally installed on one side of the vertical plate 23, with a piston rod of the first cylinder 26. A second cylinder 27 is fixedly connected to one side of the slide block 25; a connecting plate 28 is fixedly connected to the piston rod of the second cylinder 27; a sealing plate 29 is fixedly connected to the bottom of the connecting plate 28; the top of the filter plate 22 passes through the sealing plate 29 and is fixedly connected to the bottom of the connecting plate 28; a first slot 131 is provided on the inner wall of the liquid inlet pipe 13 for the bottom of the filter plate 22 to be inserted; a cleaning mechanism 3 for cleaning the filter plate 22 is installed on the vertical plate 23. The filter plate 22 is designed to facilitate filtration of the inlet pipe 13. When the filter plate 22 needs to be cleaned, the piston rod of the second cylinder 27 drives the connecting plate 28 to move upward. The upward movement of the connecting plate 28 causes the filter plate 22 to move upward. Then, the piston rod of the first cylinder 26 drives the slide block 25 to move closer to the vertical plate 23. This allows the filter plate 22 to be misaligned with the first through hole 21. Then, the cleaning mechanism 3 cleans the filter plate 22.

[0036] Reference Figure 3 and Figure 4The cleaning mechanism 3 includes a vertical groove 31 formed in the vertical plate 23, a horizontal shaft 32 vertically rotatably connected to the side wall of the vertical groove 31 via bearings, and a rotating plate 33 vertically fixed to the horizontal shaft 32. A drive assembly 5 for driving the horizontal shaft 32 to rotate is installed in the vertical groove 31. A vibration assembly 4 for vibrating the filter plate 22 is installed on the rotating plate 33. When the filter plate 22 needs to be cleaned, the horizontal shaft 32 is first driven to rotate by the drive assembly 5. The rotation of the horizontal shaft 32 drives the rotating plate 33 to rotate, thus making the rotating plate 33 horizontal. Then, the vibration assembly 4 vibrates the vibrating plate, thereby cleaning the filter plate 22. In summary, the cleaning mechanism 3 facilitates the cleaning of the filter plate 22.

[0037] Reference Figure 3 and Figure 4 The vibration assembly 4 includes a micro motor 41 mounted on one side of the rotating plate 33 and a cam 42 rotatably mounted on the other side of the rotating plate 33 via a bearing; the output shaft of the micro motor 41 passes through the rotating plate 33 and is eccentrically connected to the cam 42; a first mounting bracket 43 is fixedly connected to one side of the rotating plate 33, and an impact rod 44 is slidably connected to the first mounting bracket 43, the impact rod 44 passes through the first mounting bracket 43, a reset block 45 is fixedly connected to one side of the impact rod 44, and a first reset spring 46 is provided between the reset block 45 and the first mounting bracket 43; one end of the impact rod 44 abuts against the circumferential surface of the cam 42, and the other end can abut against the filter plate 22. When it is necessary to vibrate the filter plate 22, the micro motor 41 is started first. At this time, the output shaft of the micro motor 41 drives the cam 42 to rotate. The rotation of the cam 42 drives the impact rod 44 to move away from the cam 42. The movement of the impact rod 44 away from the cam 42 causes the reset block 45 to move away from the cam 42. At this time, the reset block 45 presses against the first reset spring 46, which enables the impact rod 44 to move back and forth. When the cam 42 rotates rapidly, it enables the impact rod 44 to move back and forth rapidly, thereby vibrating the filter plate 22. In summary, the vibration component 4 is provided to facilitate the vibration of the filter plate 22.

[0038] Reference Figure 3 and Figure 4The drive assembly 5 includes a horizontal groove 51 formed in the side wall of the vertical groove 31, a first guide rod 52 fixed to the horizontal groove 51, a first sliding sleeve 53 slidably connected to the first guide rod 52, a first baffle 54 fixed to one end of the first guide rod 52, and a horizontal spring 55 disposed between the first sliding sleeve 53 and the first baffle 54. A rack 56 is fixedly connected to the bottom of the first sliding sleeve 53, and a gear 57 is fixedly connected to one end of the horizontal shaft 32, with the gear 57 meshing with the rack 56. A transmission mechanism 6 for driving the rack 56 to move is installed in the vertical groove 31. When it is necessary to drive the horizontal shaft 32 to rotate, the rack 56 is first driven to move through the transmission mechanism 6. The movement of the rack 56 drives the gear 57 to rotate, and the rotation of the gear 57 drives the horizontal shaft 32 to rotate. In summary, the drive assembly 5 facilitates the rotation of the horizontal shaft 32.

[0039] Reference Figures 2-4 The transmission mechanism 6 includes a second mounting bracket 61 fixed to one side of the vertical groove 31, a second guide rod 62 fixed to the second mounting bracket 61, a second sliding sleeve 63 slidably connected to the second guide rod 62, and a second return spring 64 installed between the second sliding sleeve 63 and the second mounting bracket 61; a drive plate 65 is fixed to one side of the second sliding sleeve 63, and a drive block 651 is fixed to the side of the drive plate 65 near the rack 56; a first inclined surface 561 is provided on the top of the rack 56, and the first inclined surface 561 matches the side wall of the drive block 651; a through hole 66 is provided on the top of the vertical groove 31. A push plate 67 is slidably connected to the inner side of the drive plate 65 along the horizontal direction. The push plate 67 and the drive plate 65 are respectively provided with second inclined surfaces 671 on their opposite inner sides, and the two second inclined surfaces 671 match each other. A third guide rod 68 is slidably provided on the vertical plate 23. The third guide rod 68 passes through the vertical plate 23. A second baffle 681 is fixed to one end of the third guide rod 68. A third return spring 682 is horizontally provided between the second baffle 681 and the vertical plate 23. The top of the second baffle 681 is fixed to the bottom of the push plate 67. A push rod 69 is fixed to one side of the connecting plate 28. The push rod 69 abuts against one end of the push plate 67. When the piston rod of the first cylinder 26 drives the slide 25 to move closer to the vertical plate 23, the slide 25 drives the push rod 69 to move closer to the vertical plate 23. The push rod 69 moves closer to the vertical plate 23, driving the push plate 67 to move. Then, the push plate 67 drives the drive plate 65 to move downward under the action of the second inclined surface 671. The drive plate 65 moves downward, driving the drive block 651 to move downward. Then, the drive block 651 drives the rack 56 to move under the action of the first inclined surface 561. In summary, the transmission mechanism 6 is designed to facilitate the movement of the rack 56.

[0040] Reference Figure 2 and Figure 5A receiving mechanism 7 is installed on the top of the liquid inlet pipe 13. The receiving mechanism 7 includes a first dovetail groove 71 opened on the top of the liquid inlet pipe 13, a first dovetail plate 72 slidably connected to the first dovetail groove 71 in the horizontal direction, and a fourth return spring 73 fixed to one side of the first dovetail plate 72. The end of the fourth return spring 73 away from the first dovetail plate 72 is fixed to the inner wall of one end of the first dovetail groove 71. A blocking seat 74 is fixed on the top of the first dovetail plate 72. The blocking seat 74 can be positioned above the first through hole 21. A second slot 741 is opened on the top of the blocking seat 74. A receiving box 75 is inserted into the second slot 741. A vertical block 76 is fixed on the top of the blocking seat 74. A connecting rod 77 is hinged between the vertical block 76 and the drive plate 65. When the drive plate 65 moves downward, it drives the connecting rod 77 to move. The movement of the connecting rod 77 drives the blocking seat 74 to move closer to the first through hole 21. This blocks the first through hole 21, thereby reducing the amount of debris cleaned off the filter plate 22 from entering the liquid inlet pipe 13 through the first through hole 21. In addition, the movement of the blocking seat 74 closer to the first through hole 21 causes the receiving box 75 to move downwards from the filter plate 22, which facilitates the receiving box 75 in collecting the debris cleaned off the filter plate 22.

[0041] Reference Figure 1 and Figure 2 The top of the liquid inlet pipe 13 is equipped with a protective device 8 for protecting the filter device 2; the protective device 8 is provided to protect the filter device 2.

[0042] Reference Figure 1 and Figure 2 The protective device 8 includes a second dovetail groove 81 opened at the top of the liquid inlet pipe 13, a second dovetail plate 82 slidably connected to the second dovetail groove 81 in the horizontal direction, and a fifth return spring 83 fixed to one side of the second dovetail plate 82; the end of the fifth return spring 83 away from the second dovetail plate 82 is fixed to the inner wall of one end of the second dovetail groove 81; a protective cover 84 is fixed to the top of the second dovetail plate 82, a pull rod 85 is fixed to one side of the protective cover 84, and the protective cover 84 is fully open on one side and at the bottom. The protective cover 84 is provided with a second through hole 841 for the cylinder body of the first cylinder 26 to slide and a notch 842 for the cylinder body of the second cylinder 27 to slide; a horizontal rod 86 is installed on the cylinder body of the second cylinder 27, and the horizontal rod 86 abuts against the side of the protective cover 84 away from its opening. The protective cover 84 is provided to protect the filter device 2; the horizontal bar 86 is provided to drive the protective cover 84 away from the filter device 2, which facilitates the observation of the cleaning of the filter plate 22; the second dovetail plate 82 and the fifth return spring 83 are provided to facilitate the reset of the protective cover 84; the pull rod 85 is provided to facilitate the manual driving of the protective cover 84.

[0043] Working principle: The filter plate 22 is designed to facilitate filtration of the inlet pipe 13. When cleaning the filter plate 22 is required, the piston rod of the second cylinder 27 drives the connecting plate 28 to move upward. The upward movement of the connecting plate 28 causes the filter plate 22 to move upward. Then, the piston rod of the first cylinder 26 drives the slide 25 to move closer to the vertical plate 23. At this time, the slide 25 drives the push rod 69 to move closer to the vertical plate 23. The push rod 69 moves closer to the vertical plate 23, driving the push plate 67 to move. Then, the push plate 67, under the action of the second inclined surface 671, drives the drive plate 65 to move downward. The downward movement of the drive plate 65 causes the drive block 651 to move downward. Then, the drive block 651, under the action of the first inclined surface 561, drives the rack 56 to move. The movement of the rack 56 drives the gear 57 to rotate. The rotation of the gear 57 drives the horizontal shaft 32 to rotate, thus making the rotating plate 33 horizontal. In addition, when the drive plate... When 65 moves downward, the drive plate 65 drives the connecting rod 77 to move. The movement of the connecting rod 77 drives the blocking seat 74 to move closer to the first through hole 21. The movement of the blocking seat 74 to the first through hole 21 causes the receiving box 75 to move downward to the filter plate 22, so that the receiving box 75 can collect the debris cleaned off the filter plate 22. Next, the micro motor 41 is started. At this time, the output shaft of the micro motor 41 drives the cam 42 to rotate. The rotation of the cam 42 drives the impact rod 44 to move away from the cam 42. The movement of the impact rod 44 away from the cam 42 causes the reset block 45 to move away from the cam 42. At this time, the reset block 45 presses against the first reset spring 46, so that the impact rod 44 can move back and forth. When the cam 42 rotates rapidly, it can make the impact rod 44 move back and forth rapidly, so that the filter plate 22 can vibrate, thereby cleaning the filter plate 22.

[0044] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A pneumatic regulating valve, comprising a valve body (1), a valve core, a valve cover (11), a pneumatic actuator (12), an inlet pipe (13), and an outlet pipe (14), characterized in that, The inlet pipe (13) is square, and a filter device (2) is installed on the inlet pipe (13). The filter device (2) includes a first through hole (21) opened at the top of the inlet pipe (13), a filter plate (22) slidably connected to the first through hole (21) along the vertical direction, a vertical plate (23) installed on the top wall of the inlet pipe (13), a horizontal plate (24) fixed to one side of the vertical plate (23), and a strip hole (241) opened in the horizontal plate (24). A slide block (25) is slidably connected in the strip hole (241). A first cylinder (26) is installed on one side of the vertical plate (23). The piston rod of the cylinder (26) is fixed to one side of the slide (25); a second cylinder (27) is fixed to the top of the slide (25), the piston rod of the second cylinder (27) is fixed to a connecting plate (28), a sealing plate (29) is fixed to the bottom of the connecting plate (28), the top of the filter plate (22) passes through the sealing plate (29) and is fixed to the bottom of the connecting plate (28), the inner wall of the liquid inlet pipe (13) is provided with a first slot (131) for the bottom of the filter plate (22) to be inserted, and a cleaning mechanism (3) for cleaning the filter plate (22) is installed on the vertical plate (23); The cleaning mechanism (3) includes a vertical groove (31) formed in the vertical plate (23), a horizontal shaft (32) rotatably connected to the side wall of the vertical groove (31), and a rotating plate (33) vertically fixed to the horizontal shaft (32); a drive assembly (5) for driving the horizontal shaft (32) to rotate is installed in the vertical groove (31); a vibration assembly (4) for vibrating the filter plate (22) is installed on the rotating plate (33); The vibration assembly (4) includes a micro motor (41) mounted on one side of the rotating plate (33) and a cam (42) rotatably mounted on the other side of the rotating plate (33); the output shaft of the micro motor (41) passes through the rotating plate (33) and is eccentrically connected to the cam (42); a first mounting bracket (43) is fixedly connected to one side of the rotating plate (33), an impact rod (44) is slidably connected to the first mounting bracket (43), a reset block (45) is fixedly connected to one side of the impact rod (44), and a first reset spring (46) is provided between the reset block (45) and the first mounting bracket (43); one end of the impact rod (44) abuts against the circumferential surface of the cam (42), and the other end can abut against the filter plate (22); The drive assembly (5) includes a horizontal groove (51) formed on the side wall of the vertical groove (31), a first guide rod (52) fixed to the horizontal groove (51), a first sliding sleeve (53) slidably connected to the first guide rod (52), a first baffle (54) fixed to one end of the first guide rod (52), and a first return spring (46) disposed between the first sliding sleeve (53) and the first baffle (54); a rack (56) is fixedly connected to the bottom of the first sliding sleeve (53), and a gear (57) is fixedly connected to one end of the horizontal shaft (32), the gear (57) meshing with the rack (56); a transmission mechanism (6) for driving the rack (56) to move is installed in the vertical groove (31). The transmission mechanism (6) includes a second mounting bracket (61) fixed to one side of the vertical groove (31), a second guide rod (62) fixed to the second mounting bracket (61), a second sliding sleeve (63) slidably connected to the second guide rod (62), and a second return spring (64) installed between the second sliding sleeve (63) and the second mounting bracket (61); a drive plate (65) is fixed to one side of the second sliding sleeve (63), and a drive block (651) is fixed to the side of the drive plate (65) near the rack (56); a first inclined surface (561) is provided on the top of the rack (56), and the first inclined surface (561) matches the side wall of the drive block (651); a through hole (66) is provided on the top of the vertical groove (31), and the through hole (66) is provided on the top of the vertical groove (31). A push plate (67) is slidably connected inside the hole (66). The push plate (67) and the drive plate (65) are respectively provided with a second inclined surface (671) on their opposite inner sides, and the two second inclined surfaces (671) match each other. A third guide rod (68) is slidably provided on the vertical plate (23). The third guide rod (68) is provided through the vertical plate (23). A second baffle (681) is fixedly connected to one end of the third guide rod (68). A third return spring (682) is provided between the second baffle (681) and the vertical plate (23). The top of the second baffle (681) is fixedly connected to the bottom of the push plate (67). A push rod (69) is fixedly connected to one side of the connecting plate (28). The push rod (69) abuts against one end of the push plate (67). The top of the liquid inlet pipe (13) is equipped with a receiving mechanism (7), which includes a first dovetail groove (71) opened at the top of the liquid inlet pipe (13), a first dovetail plate (72) slidably connected to the first dovetail groove (71), and a fourth return spring (73) fixed to one side of the first dovetail plate (72); the end of the fourth return spring (73) away from the first dovetail plate (72) is fixed to the inner wall of one end of the first dovetail groove (71); a blocking seat (74) is fixed to the top of the first dovetail plate (72), which can be positioned above the first through hole (21); a second slot (741) is opened at the top of the blocking seat (74), and a receiving box (75) is inserted into the second slot (741); a vertical block (76) is fixed to the top of the blocking seat (74), and a connecting rod (77) is hinged between the vertical block (76) and the drive plate (65). After the second cylinder (27) drives the filter plate (22) to move up away from the liquid inlet pipe (13), the first cylinder (26) drives the rotating plate (33) to a horizontal state, the blocking seat (74), and the receiving box (75) to move to the bottom of the filter plate (22) through the transmission mechanism. The drive cam (42) driven by the micro motor (41) rotates and drives the impact rod (44) to move back and forth quickly to vibrate and clean the filter plate (22). The receiving box (75) collects the debris cleaned off the filter plate (22).

2. The pneumatic regulating valve according to claim 1, characterized in that, The top of the inlet pipe (13) is equipped with a protective device (8) for protecting the filter device (2).

3. A pneumatic regulating valve according to claim 2, characterized in that, The protective device (8) includes a second dovetail groove (81) opened at the top of the inlet pipe (13), a second dovetail plate (82) slidably connected to the second dovetail groove (81), and a fifth return spring (83) fixed to one side of the second dovetail plate (82); the end of the fifth return spring (83) away from the second dovetail plate (82) is fixed to the inner wall of one end of the second dovetail groove (81); a protective cover (84) is fixed to the top of the second dovetail plate (82), and the protective device (8) includes a second dovetail groove (81) opened at the top of the inlet pipe (13), a second dovetail plate (82) slidably connected to the second dovetail groove (81), and a fifth return spring (83) fixed to one side of the second dovetail plate (82). A pull rod (85) is fixed to one side of the cover (84). The cover (84) is fully open on one side and at the bottom. The cover (84) has a second through hole (841) for the cylinder body of the first cylinder (26) to slide and a notch (842) for the cylinder body of the second cylinder (27) to slide. The cylinder body of the second cylinder (27) is equipped with a horizontal rod (86), which abuts against the side of the cover (84) away from its opening.

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