Automatic reset check valve with automatic reset and quick response functions

Abstract

The invention relates to the technical field of check valves, in particular to an automatic reset check valve with automatic reset and quick response, which comprises a valve body, a valve cover, a valve clack and a connecting plate rotatably mounted on the inner side wall of the valve body through a rotating shaft, and is characterized in that the inner wall of the valve body is rotatably connected with a rotating rod, an impeller is mounted on the side wall of the rotating rod, and the rotating rod is rotatably connected with the valve cover. A box body is fixed to the inner side wall of the valve body, a rotating rod penetrates through the side wall of the box body and then is slidably sleeved with a driving gear, an electric hoop is installed on the side wall of the driving gear, a sliding seat is slidably connected to the side wall of the box body, a sliding groove is formed in the side wall of the sliding seat, and a driving rack is installed on the side wall of the sliding seat. When flowing of fluid in an external pipeline needs to be stopped, the electric hoop, the driving rack, the triangular block and other structures are arranged, in the sliding process of the sliding base, the sliding plate is in a static state, the reset spring between the sliding plate and the sliding base is compressed, elastic potential energy is accumulated, and follow-up automatic reset and quick response of the valve clack are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of check valves, and in particular to an automatic reset and fast-responding automatic reset check valve. Background Art

[0002] A check valve is a valve with a circular disc as its opening and closing member. It operates by its own weight and the pressure of the medium to block the backflow of the medium. This type of valve allows the medium to flow in one direction only and prevents flow in the opposite direction. Typically, this valve operates automatically. The disc opens in response to fluid pressure flowing in one direction. When the fluid flows in the opposite direction, the fluid pressure and the self-recognition of the disc act on the valve seat, shutting off the flow.

[0003] At present, spring-assisted check valves are often chosen in pipeline scenarios that require quick closure. However, when the spring-assisted check valve is used to transport fluids containing solid particles or high-viscosity fluids, the particles may block the valve disc and spring, and the high-viscosity medium causes a delay in the spring response. The swing check valve, on the other hand, relies on the backflow of the fluid to push the valve disc closed, does not require a spring, has a simple structure and a wide range of applications, and can be used for fluids containing solid particles or high viscosity. However, the current swing check valves often rely on the weakened fluid velocity in the pipeline to complete closure when the valve disc is closed, which results in a slow response speed of the valve disc closing and has certain defects.

[0004] Therefore, we have designed an automatic reset check valve with automatic reset and fast response. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and to propose an automatic reset and fast-responding automatic reset check valve.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The cam is fixedly mounted on the valve body, and the cam is connected to the valve body by a toothed connection, and the cam is connected to the valve body by a toothed connection. A lifting mechanism is provided inside the valve flap to improve sealing performance.

[0007] Preferably, the lifting mechanism includes a rectangular cavity opened on the inner wall of the valve disc, the inner wall of the rectangular cavity is sealed and slidably connected to a rectangular plate, the side wall of the rectangular plate is fixedly connected to a long rack, the side wall of the rectangular cavity is rotatably connected to a circular shaft, the side wall of the circular shaft is fixedly connected to a mating gear, the mating gear and the long rack are meshed and connected, and the side wall of the circular shaft is fixedly connected to multiple cleaning plates.

[0008] Preferably, the side wall of the box body is fixedly connected to a rectangular box, a sliding plug is sealingly and slidingly connected inside the rectangular box, the side wall of the sliding plug is fixedly connected to a push rod, and the push rod passes through the inner wall of the rectangular box and is fixedly connected to the sliding seat.

[0009] Preferably, the lifting mechanism further comprises a circular hole opened at one end of the rotating shaft, a rotating joint is fixedly mounted on one end of the rotating shaft, a connecting pipe is fixedly connected to the inner wall of the rectangular box, and the connecting pipe is fixedly connected to the rotating joint at one end away from the rectangular box.

[0010] Preferably, a delivery pipe is embedded in the inner wall of the connecting plate, one end of the delivery pipe is connected to the circular hole, and the other end of the delivery pipe is fixedly connected to the rectangular cavity.

[0011] Preferably, a groove is provided at one end of the cleaning plate, and a wedge-shaped scraper is slidably connected to the inner wall of the groove. The wedge-shaped scraper is elastically connected to the inner wall of the groove through a tension spring, and the cleaning plate and the side wall of the valve disc slide against each other, and the wedge-shaped scraper and the side wall of the valve disc slide against each other.

[0012] Preferably, the side wall of the slide seat is symmetrically installed with a tension spring, the other end of the tension spring is fixedly connected to the inner wall of the box body, the side wall of the slide plate is fixedly connected to a limit rod, the limit rod passes through the inner wall of the slide groove, and the reset spring is sleeved on the side wall of the limit rod.

[0013] Preferably, a sealing ring is installed on the inner wall of the valve body, the driving gear and the driving rack are meshed and connected, and the triangular block and the limit block are in contact with each other.

[0014] Preferably, the wedge block slides against the wedge plate after moving a certain distance, the side wall of the round rod is fixedly connected to a torsion spring, and the torsion spring is fixedly connected to the inner wall of the box body.

[0015] Preferably, the first gear and the second gear are meshed and connected, the toothed belt and the first gear are meshed and connected, the connecting plate and the side wall of the valve disc are fixedly connected, and the valve disc and the sealing ring are tightly against each other.

[0016] Compared with the existing technology, the advantages of the present invention are: 1. When the user needs to suspend the flow of fluid in the external pipeline, by setting up the electric clamp, drive rack and triangular block and other structures, the slide plate is in a stationary state during the sliding process of the slide seat, and the return spring between the slide plate and the slide seat is compressed to accumulate elastic potential energy, which facilitates the subsequent automatic reset and rapid response of the valve disc; 2. During the movement of the slide, the slide will drive the push rod fixed to it to move. By setting up structures such as connecting pipes, rotating joints and rectangular plates, the delivery pipes and connecting pipes and other pipes are placed in the position where the fluid does not flow, thereby protecting them. The circular shaft drives the multiple cleaning plates and wedge-shaped scrapers fixed to its side walls to rotate a certain angle, scraping the side walls of the valve disc against each other to scrape off impurities adhering to the valve disc, preventing these impurities from affecting the sealing of the valve disc; 3. When the slide continues to move until the wedge block and wedge plate fixed to its side wall slide against each other, the return spring will extend and reset, driving the slide to move rapidly. By setting up the first gear, the second gear and the electromagnetic clutch, the rotating shaft drives the fixed connecting plate to move. Then, the connecting plate drives the valve disc fixed to it to rotate rapidly until the valve disc and the side wall of the sealing ring contact and form a seal, thereby achieving the effect of automatic reset and rapid effect. 4. When the valve disc moves quickly to contact the sealing ring to form a check state, the fluid flow rate drops sharply, the inertia of the fluid downstream of the pipeline disappears, and the fluid begins to flow back to produce a water hammer effect. At this time, the fluid in the pipeline to the right of the valve disc can continuously generate thrust on the impeller, and the rotation of the rotating rod has a certain damping effect. Then, the impeller can consume part of the fluid impact through its own rotation, thereby reducing the damage caused by the water hammer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an automatic reset and fast-responding automatic reset check valve proposed by the present invention; Figure 2 This is a schematic diagram of the internal structure of a rectangular box in an automatic reset and fast-response automatic reset check valve proposed by the present invention; Figure 3 This is a schematic diagram of the internal structure of a slideway in an automatic reset and fast-responding automatic reset check valve proposed by the present invention; Figure 4 for Figure 3 A magnified schematic diagram of the structure of part A; Figure 5 This is a schematic diagram of the installation position of a rotary joint in an automatic reset and fast-response automatic reset check valve proposed by the present invention; Figure 6 This is a schematic diagram of the connection relationship between the delivery pipe and the circular hole in an automatic reset and fast-response automatic reset check valve proposed by the present invention; Figure 7 This is a schematic diagram of the internal structure of a rectangular cavity in an automatic reset and fast-response automatic reset check valve proposed by the present invention; Figure 8 This is a schematic diagram of the internal structure of a groove in an automatic reset and fast-responding automatic reset check valve proposed by the present invention; Figure 9 This is a schematic diagram of the appearance of an automatic reset and fast-responding automatic reset check valve proposed by the present invention; Figure 10 The present invention provides a schematic diagram of the connection relationship between a torsion spring and a round rod in an automatic reset and fast-response automatic reset check valve.

[0018] Figure: 1, valve body; 2, valve cover; 3, valve disc; 4, connecting plate; 5, rotating shaft; 6, sealing ring; 7, rotating rod; 8, impeller; 9, driving gear; 10, electric clamp; 11, slide; 12, slide; 13, limit rod; 14, return spring; 15, slide plate; 16, limit block; 17, wedge plate; 18, triangular block; 19, wedge block; 20, tension spring; 21, round rod; 22, torsion spring; 23, toothed belt; 24, gear Shaft; 25. First gear; 26. Second gear; 27. Electromagnetic clutch; 28. Rotary joint; 29. ​​Round hole; 30. Delivery pipe; 31. Rectangular cavity; 32. Round shaft; 33. Matching gear; 34. Cleaning plate; 35. Groove; 36. Wedge-shaped scraper; 37. Tension spring; 38. Rectangular box; 39. Push rod; 40. Sliding plug; 41. Connecting pipe; 42. Box body; 43. Rectangular plate; 44. Drive rack; 45. Long rack. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Reference Figures 1-10 , an automatic reset and quick response automatic reset check valve, including a valve body 1, a valve cover 2, a valve disc 3 and a connecting plate 4, the inner wall of the valve body 1 is embedded with a rotating shaft 5, the side wall of the rotating shaft 5 is fixedly connected to the connecting plate 4, the inner wall of the valve body 1 is rotatably connected to a rotating rod 7, the side wall of the rotating rod 7 is installed with an impeller 8, the inner wall of the valve body 1 is fixed with a box body 42, the rotating rod 7 passes through the side wall of the box body 42 and is slidably sleeved with a driving gear 9, the driving gear 9 can only rotate on the side wall of the rotating rod 7 without generating displacement, the side wall of the driving gear 9 is installed with an electric clamp 10, the electric clamp 10 is a prior art and is not described here in detail, the side wall of the box body 42 is slidably connected to a slide 11, the side wall of the slide 11 is provided with a slide groove 12, the side wall of the slide 11 is installed with a driving rack 44, the inner wall of the slide groove 12 is slidably connected to a slide plate 15, and the side wall of the slide plate 15 is fixed with a limiting block 16 (such as Figure 4 As shown), a toothed belt 23 is fixed to the side wall of the slide 15, a return spring 14 is fixedly connected to the side wall of the slide 15, the return spring 14 is fixedly connected to the inner wall of the slide groove 12, a wedge block 19 is fixedly connected to the side wall of the slide seat 11, a round rod 21 is rotatably connected to the inner wall of the box body 42, a wedge plate 17 is fixedly connected to the side wall of the round rod 21, a triangular block 18 is installed on the side wall of the wedge plate 17, and the triangular block 18 is a right-angled triangle structure. An electromagnetic clutch 27 is fixedly connected to the side wall of the rotating shaft 5. The electromagnetic clutch 27 refers to a friction clutch that generates a pressing force by electromagnetic force. A second gear 26 is fixedly installed on the outer side wall of the electromagnetic clutch 27. The inner wall of the valve body 1 is rotatably connected to the gear shaft 24, and the side wall of the gear shaft 24 is fixedly connected to the first gear 25; A lifting mechanism is provided inside the valve flap 3 to improve the sealing performance.

[0021] The lifting mechanism includes a rectangular cavity 31 opened on the inner wall of the valve disc 3, an electromagnetic valve is installed on the inner wall of the rectangular cavity 31, a rectangular plate 43 is sealingly and slidingly connected to the inner wall of the rectangular cavity 31, a long rack 45 is fixedly connected to the side wall of the rectangular plate 43, a circular shaft 32 is rotatably connected to the side wall of the rectangular cavity 31, a matching gear 33 is fixedly connected to the side wall of the circular shaft 32, the matching gear 33 and the long rack 45 are meshed and connected, and a plurality of cleaning plates 34 are fixedly connected to the side wall of the circular shaft 32.

[0022] The side wall of the box body 42 is fixedly connected to the rectangular box 38, and the inside of the rectangular box 38 is sealed and slidably connected to the sliding plug 40. The side wall of the sliding plug 40 is fixedly connected to the push rod 39, which penetrates the inner wall of the rectangular box 38 and is fixedly connected to the sliding seat 11.

[0023] The lifting mechanism further includes a circular hole 29 (such as Figure 6 As shown, a rotary joint 28 is fixedly mounted on one end of the rotating shaft 5 (as shown Figure 5 As shown), the rotary joint 28 is a prior art and will not be described in detail here. The inner wall of the rectangular box 38 is fixedly connected with a connecting pipe 41. The connecting pipe 41 is embedded in the inner wall of the valve body 1 away from the rectangular box 38, and the end of the connecting pipe 41 away from the rectangular box 38 is fixedly connected to the rotary joint 28, so that the connecting pipe 41 is not arranged in the area where the fluid flows, thereby avoiding the pressure generated when the fluid flows inside the valve body 1 to cause damage to the connecting pipe 41.

[0024] The inner wall of the connecting plate 4 is embedded with a delivery pipe 30 (such as Figure 6 As shown), one end of the delivery pipe 30 is connected to the circular hole 29, and the other end of the delivery pipe 30 is fixedly connected to the rectangular cavity 31.

[0025] One end of the cleaning plate 34 is provided with a groove 35 (such as Figure 8 As shown), the inner wall of the groove 35 is slidably connected to a wedge-shaped scraper 36, the side wall of the wedge-shaped scraper 36 is fixedly connected to a tension spring 37, the other end of the tension spring 37 is fixedly connected to the inner wall of the groove 35, the cleaning plate 34 and the side wall of the valve disc 3 slide against each other, and the wedge-shaped scraper 36 and the side wall of the valve disc 3 slide against each other.

[0026] The side wall of the slide 11 is symmetrically installed with a tension spring 20, the other end of the tension spring 20 is fixedly connected to the inner wall of the box body 42, the side wall of the slide 15 is fixedly connected to the limit rod 13, the limit rod 13 passes through the inner wall of the slide groove 12, and the return spring 14 is sleeved on the side wall of the limit rod 13.

[0027] A sealing ring 6 is installed on the inner wall of the valve body 1. When the wedge-shaped scraper 36 is closed with the valve disc 3, when the oblique part of the wedge-shaped scraper 36 contacts the sealing ring 6, the wedge-shaped scraper 36 will slide a distance inside the groove 35 and squeeze the tension spring 37, the driving gear 9 and the driving rack 44 are engaged and connected, and the triangular block 18 and the limit block 16 are in contact.

[0028] The wedge block 19 moves a certain distance and then slides against the wedge plate 17 . The side wall of the round rod 21 is fixedly connected to the torsion spring 22 , and the torsion spring 22 is fixedly connected to the inner wall of the box body 42 .

[0029] The first gear 25 and the second gear 26 are meshed and connected, the toothed belt 23 and the first gear 25 are meshed and connected, the connecting plate 4 and the side wall of the valve disc 3 are fixedly connected, and the valve disc 3 and the sealing ring 6 are tightly abutted when covered.

[0030] In the present invention, after the check valve is installed, when the fluid in the external pipeline enters the valve body 1 from left to right, under the action of the fluid pressure, the fluid will drive the rotating shaft 5 to rotate a certain angle through the valve disc 3 and the connecting plate 4. At this time, under the action of the electromagnetic clutch 27, the second gear 26 will not rotate, thereby facilitating the flow of fluid through the check valve. At this time, the electric clamp 10 is not energized and tightened, and the impeller 8 drives the rotating rod 7 to rotate freely.

[0031] When the user needs to suspend the flow of fluid in the external pipeline, the controller powers on the electric clamp 10, and the electric clamp 10 clamps the rotating rod 7 after being energized, and then the impeller 8 drives the driving gear 9 to rotate through the rotating rod 7 and the electric clamp 10, and the driving gear 9 drives the driving rack 44 meshed with it to move a distance, and then the driving rack 44 drives the slide 11 fixed to it to slide a distance. Since the triangular block 18 fixedly connected to the side wall of the wedge plate 17 and the limit block 16 fixed on the slide 15 are in contact, the slide 15 cannot move synchronously. Then, during the sliding process of the slide 11, since the slide 15 is in a stationary state, the reset spring 14 between the slide 15 and the slide 11 is compressed to accumulate elastic potential energy, which is convenient for the subsequent automatic reset and rapid response of the valve disc 3.

[0032] During the movement of the slide 11, the slide 11 will first drive the push rod 39 fixed to it to move, and the push rod 39 will drive the slide plug 40 fixed to it to slide for a distance in a sealed manner inside the rectangular box 38. The rectangular box 38 is filled with mineral oil, and then this part of the mineral oil is squeezed into the connecting pipe 41 for circulation, and then enters the circular hole 29 through the rotary joint 28 for circulation, and then enters the rectangular cavity 31 for circulation through the delivery pipe 30. Then, this part of the mineral oil will push the rectangular plate 43 to slide for a distance in a sealed manner inside the rectangular cavity 31, so that the rectangular plate 43 drives the long rack 45 to move simultaneously. When the rack 45 moves a certain distance, the long rack 45 will drive the mating gear 33 meshing with it to rotate a certain angle, and the mating gear 33 will drive the circular shaft 32 fixedly connected to it to rotate a certain angle, and the circular shaft 32 will drive the multiple cleaning plates 34 and wedge-shaped scrapers 36 fixedly connected to its side walls to rotate a certain angle. Since the cleaning plates 34 and the wedge-shaped scrapers 36 are all against and slide against the side walls of the valve disc 3, the multiple cleaning plates 34 and the wedge-shaped scrapers 36 can scrape against the side walls of the valve disc 3 during the movement, and scrape off impurities adhering to the valve disc 3 to prevent these impurities from affecting the sealing performance of the valve disc 3.

[0033] When the slide 11 continues to move until the wedge block 19 fixedly connected to its side wall and the wedge plate 17 slide against each other, the wedge plate 17 will rotate under the action of the wedge block 19. Then the wedge plate 17 will drive the triangular block 18 to move upward synchronously, so that the triangular block 18 and the limit block 16 are out of contact with each other. At this time, since the return spring 14 is in a compressed state, the return spring 14 will quickly extend and reset. Then the return spring 14 will drive the slide plate 15 to move a distance quickly, so that the toothed belt 23 fixedly connected to the side wall of the slide plate 15 drives the first gear 25 meshed with it to rotate a certain angle, the first gear 25 drives the second gear 26 meshed with it to rotate a certain angle, and the second gear 26 drives the electromagnetic clutch 27 to rotate clockwise a certain angle (such as Figure 2 As shown), at this time, the electromagnetic clutch 27 is started by the controller to drive the rotating shaft 5 fixedly connected thereto to rotate synchronously, so that the rotating shaft 5 drives the connecting plate 4 fixedly connected thereto to move, and then the connecting plate 4 will drive the valve flap 3 fixedly connected thereto to rotate rapidly until the valve flap 3 and the side wall of the sealing ring 6 are in contact with each other to form a seal, thereby achieving the effects of automatic reset and rapid effect.

[0034] When the valve disc 3 moves quickly to abut against the sealing ring 6 to form a "check state", the fluid flow rate drops sharply, the inertia of the fluid in the downstream pipeline disappears, and the fluid begins to flow back to produce a water hammer effect. At this time, the fluid in the pipeline on the right side of the valve disc 3 can continuously generate thrust on the impeller 8. The reverse rotation of the rotating rod 7 has a certain damping effect, and the impeller 8 can consume part of the impact of the fluid through its own rotation, thereby reducing the damage caused by the water hammer effect.

[0035] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic reset and quick response automatic reset check valve, comprising a valve body (1), a valve cover (2), a valve disc (3) and a connecting plate (4), wherein the connecting plate (4) is rotatably mounted on the inner wall of the valve body (1) via a rotating shaft (5), and is characterized in that: The inner wall of the valve body (1) is rotatably connected to a rotating rod (7), and an impeller (8) is installed on the side wall of the rotating rod (7). The inner wall of the valve body (1) is fixed to a box body (42). The rotating rod (7) penetrates the side wall of the box body (42) and is slidably sleeved with a driving gear (9). The side wall of the driving gear (9) is installed with an electric clamp (10). The side wall of the box body (42) is slidably connected to a slide seat (11). The side wall of the slide seat (11) is provided with a slide groove (12). The side wall of the slide seat (11) is installed with a driving rack (44). The inner wall of the slide groove (12) is slidably connected to a slide plate (15). The slide plate (15) A limit block (16) is fixed on the side wall, a toothed belt (23) is fixed on the side wall of the slide plate (15), the slide plate (15) is elastically connected to the inner wall of the slide groove (12) through a return spring (14), a wedge block (19) is fixedly connected to the side wall of the slide seat (11), the inner side wall of the box body (42) is rotatably connected to the wedge plate (17) through a round rod (21), a triangular block (18) is installed on the side wall of the wedge plate (17), a second gear (26) is installed on the side wall of the rotating shaft (5) through an electromagnetic clutch (27), and the inner wall of the valve body (1) is rotatably connected to the first gear (25) through a gear shaft (24); A lifting mechanism for improving sealing performance is provided inside the valve flap (3).

2. The automatic reset and quick response automatic reset check valve according to claim 1, characterized in that: The lifting mechanism comprises a rectangular cavity (31) formed on the inner wall of the valve disc (3); the inner wall of the rectangular cavity (31) is sealed and slidably connected to a rectangular plate (43); the side wall of the rectangular plate (43) is fixedly connected to a long rack (45); the side wall of the rectangular cavity (31) is rotatably connected to a circular shaft (32); the side wall of the circular shaft (32) is fixedly connected to a matching gear (33); the matching gear (33) and the long rack (45) are meshed and connected; and the side wall of the circular shaft (32) is fixedly connected to a plurality of cleaning plates (34).

3. The automatic reset and quick response automatic reset check valve according to claim 2, characterized in that: The side wall of the box body (42) is fixedly connected to a rectangular box (38), the interior of the rectangular box (38) is sealed and slidably connected to a sliding plug (40), the side wall of the sliding plug (40) is fixedly connected to a push rod (39), and the push rod (39) passes through the inner wall of the rectangular box (38) and is fixedly connected to the sliding seat (11).

4. The automatic reset and quick response automatic reset check valve according to claim 3, characterized in that: The lifting mechanism further comprises a circular hole (29) formed at one end of the rotating shaft (5), a rotating joint (28) being fixedly mounted at one end of the rotating shaft (5), a connecting pipe (41) being fixedly connected to the inner wall of the rectangular box (38), and an end of the connecting pipe (41) away from the rectangular box (38) being fixedly connected to the rotating joint (28).

5. The automatic reset and quick response automatic reset check valve according to claim 4, characterized in that: A delivery pipe (30) is embedded and installed on the inner wall of the connecting plate (4); one end of the delivery pipe (30) is connected to the circular hole (29), and the other end of the delivery pipe (30) is fixedly connected to the rectangular cavity (31).

6. The automatic reset and quick response automatic reset check valve according to claim 2, characterized in that: A groove (35) is formed at one end of the cleaning plate (34), and a wedge-shaped scraper (36) is slidably connected to the inner wall of the groove (35). The wedge-shaped scraper (36) is elastically connected to the inner wall of the groove (35) via a tension spring (37). The cleaning plate (34) and the side wall of the valve disc (3) slide against each other, and the wedge-shaped scraper (36) and the side wall of the valve disc (3) slide against each other.

7. The automatic reset and quick response automatic reset check valve according to claim 1, characterized in that: A tension spring (20) is symmetrically mounted on the side wall of the slide seat (11), and the other end of the tension spring (20) is fixedly connected to the inner wall of the box body (42). The side wall of the slide plate (15) is fixedly connected to a limit rod (13), and the limit rod (13) passes through the inner wall of the slide groove (12). The return spring (14) is sleeved on the side wall of the limit rod (13).

8. The automatic reset and quick response automatic reset check valve according to claim 1, characterized in that: A sealing ring (6) is installed on the inner wall of the valve body (1), the driving gear (9) and the driving rack (44) are meshed and connected, and the triangular block (18) and the limit block (16) are in contact with each other.

9. The automatic reset and quick response automatic reset check valve according to claim 1, characterized in that: The wedge block (19) slides against the wedge plate (17) after moving a certain distance, and a torsion spring (22) is fixedly connected to the side wall of the round rod (21), and the torsion spring (22) is fixedly connected to the inner wall of the box body (42).

10. The automatic reset and quick response automatic reset check valve according to claim 8, characterized in that: The first gear (25) and the second gear (26) are meshed and connected, the toothed belt (23) and the first gear (25) are meshed and connected, the connecting plate (4) and the side wall of the valve flap (3) are fixedly connected, and the valve flap (3) and the sealing ring (6) are tightly abutted against each other.

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