A pressure-sealed piston valve cover check valve mechanism

Abstract

The present invention relates to the field of valve technology, and discloses a pressure-sealed piston valve cover check valve mechanism, comprising: a valve body, the valve body comprising a water inlet, a water outlet and an inspection port; a first ring, a second ring and a valve seat arranged in the valve body, the first ring and the valve seat being located between the water inlet and the inspection port, and a valve core arranged between the valve seat and the second ring; a rotating component is arranged to allow the valve core to rotate when it is reset, and its rotation by a preset angle can change the position of the second sealing ring thereon, so that different parts correspond to the inspection port to balance the degree of wear of the second sealing ring, thereby avoiding the situation where the second sealing ring is not sealed tightly due to partial wear. Compared with the check valve mechanism in the prior art, the present application can solve the problem that impurities are easily accumulated at the contact position of the valve disc, and the elastic sealing ring will be worn after long-term use, which may cause sealing failure.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a pressure sealing piston valve cover check valve mechanism. Background Art

[0002] A check valve is an automatic valve used to prevent the reverse flow of fluid. It plays a vital role in fluid systems, especially in situations where it is necessary to prevent backflow from causing equipment damage or process interruption. The design and performance of the check valve have a direct impact on the safety and efficiency of the entire system. Common types of check valves include swing check valves, lift check valves, and piston check valves.

[0003] The piston bonnet check valve is a special check valve that controls the flow direction of the fluid through the reciprocating motion of the piston. When the fluid flows in the forward direction, the piston is pushed to open the valve to allow the fluid to pass; when the fluid flows in the reverse direction, the piston returns to its position, sealing the valve port to prevent the fluid from flowing back. Piston check valves are usually used in situations that require tight sealing and have good sealing performance and pressure resistance.

[0004] However, in the specific application process, the medium flows in from the inlet end and flows out from the outlet end; when the inlet pressure is greater than the sum of the valve disc resistance and its flow resistance, the valve is opened, and vice versa, when the medium flows back, the valve is closed. When the existing check valve is in use, impurities are easily accumulated at the contact position with the valve disc. After long-term use, the elastic sealing ring will wear out, which may cause the seal to fail. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a pressure-sealed piston valve cover check valve mechanism, which aims to alleviate the above-mentioned problems at least to a certain extent.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A pressure-sealed piston valve cover check valve mechanism, comprising:

[0008] A valve body, the valve body comprising a water inlet, a water outlet and an inspection port;

[0009] A first ring, a second ring and a valve seat are arranged in the valve body, wherein the first ring and the valve seat are located between the water inlet and the inspection port,

[0010] a valve core disposed between the valve seat and the second ring;

[0011] A first sealing ring on the valve seat and a second sealing ring on the valve core, wherein the first sealing ring and the second sealing ring are respectively provided with an oblique opening;

[0012] an elastic member disposed between the valve core and the second ring;

[0013] A cleaning portion provided between the valve seat and the valve core, used for cleaning the first sealing ring when the liquid passes through the valve body;

[0014] a rotating component disposed between the valve core and the second ring, used for rotating the valve core by a preset angle when the valve core moves toward the valve seat;

[0015] A moving component disposed in the valve body, used for moving the position of the cleaning portion when the valve core moves toward the second ring, and the cleaning portion moves toward the inner wall of the valve body;

[0016] Wherein, the cleaning part comprises a cleaning brush, and the cleaning brush can rotate when the cleaning part moves toward the inner wall of the valve body to a preset position, and contacts the oblique opening on the first sealing ring.

[0017] Preferably, the cleaning part includes a plurality of box bodies arranged between the valve seat and the valve core, a side opening is opened on one side of the box body, the cleaning brush is arranged in the box body and extends to the outside through the side opening, a top plate is provided on the top of the box body, a connecting rod is connected to the bottom of the top plate, a first spring is connected between the top plate and the box body, a fixed shaft is rotatably connected in the box body, the cleaning brush is fixed on the fixed shaft, a third spring is connected between the cleaning brush and the box body, a first traction rope is wound on the fixed shaft, and one end of the first traction rope is connected to the connecting rod.

[0018] Preferably, the moving component includes a connecting opening opened on the valve core, a fixing plate is provided in the connecting opening, the valve core is rotatably connected to the fixing plate through the connecting opening, a connecting shaft is connected to one side of the fixing plate, a connecting frame is connected to the fixing plate, a connecting ring sleeved on the connecting shaft is rotatably connected to the connecting frame, a connecting rod is rotatably connected to the connecting ring, and the other end of the connecting rod is rotatably connected to the box body.

[0019] Preferably, a bracket is rotatably connected to the valve seat, a limiting rod slidably connected to the box body is connected to the bracket, and a fourth spring is connected between the box body and the bracket.

[0020] Preferably, a receiving opening is provided on one side of the valve core.

[0021] Preferably, the first ring is connected to a first fixing frame, the first fixing frame is rotatably connected to a connecting pipe sleeved with the connecting shaft, the connecting pipe is provided with blades, and a telescopic rod is connected between the blades and the connecting ring.

[0022] Preferably, the telescopic rod comprises a first rod connected to the blade, the connecting ring is connected to a second rod slidably connected to the first rod, and a fifth spring is connected between the first rod and the second rod.

[0023] Preferably, the rotating component includes a second fixed frame connected to the second ring, the second fixed frame is slidably connected to a sliding shaft connected to the fixed plate, the elastic member is connected between the fixed plate and the second fixed frame, the fixed plate is connected to a support rod, the support rod is rotatably connected to a rotating shaft, a sixth spring is connected between the rotating shaft and the support rod, a first gear is provided on the rotating shaft, a second gear meshing with the first gear is connected to the valve core, a second traction rope is connected to the second fixed frame, and one end of the second traction rope is wound around the rotating shaft.

[0024] Preferably, a ratchet mechanism is provided between the rotating shaft and the first gear.

[0025] Preferably, a third sealing ring is provided between the fixing plate and the valve core.

[0026] In summary, the present invention mainly has the following beneficial effects:

[0027] By setting the valve body, when in use, the operator can connect the liquid delivery pipe to the flange on the valve body, and the liquid delivered by the liquid delivery pipe can enter the valve body from the liquid inlet. The increased pressure in the valve body will press the position of the valve core, causing the valve core to compress the elastic member to move, and the first sealing ring on the valve seat and the second sealing ring on the valve core will separate. The liquid can reach the position of the second ring through the gap between the valve core and the valve seat and the inspection port, so as to flow out from the second ring and the water outlet. When the delivery of liquid stops, the pressure in the valve body disappears. At this time, the elastic member releases potential energy to reset the valve core, and the pressure of the elastic member can be used to squeeze the first sealing ring, so that the oblique openings of the two are adapted and When the first sealing ring and the second sealing ring are squeezed against each other, the second sealing ring will expand to a certain extent due to the setting of the oblique opening, so as to increase the sealing performance after the two are in contact and improve the check barrier effect. Furthermore, when the valve core moves toward the second ring due to the pressure of the liquid, the provided moving component can move the cleaning part, and the cleaning part moves toward the inner wall of the valve body. When the cleaning part moves to a preset position, the cleaning brush can rotate, and the bristles of the cleaning brush can contact the oblique opening of the first sealing ring. When the liquid passes through the valve body, the cleaning part can also rotate. In conjunction with the bristles of the cleaning brush contacting the oblique opening, the cleaning brush can rotate about the axis of the valve body to seal the first sealing ring. When the liquid is transported, the liquid will be blocked by the valve core, and the liquid will hit the valve core. The impact force of the water flow can be used to clean the second sealing ring on the valve core, and the first sealing ring is opposite to the flow direction of the liquid. Therefore, the cleaning brush can be used to remove the material deposited on the first sealing ring, and both the first sealing ring and the second sealing ring can be cleaned to ensure the sealing performance when the valve core is reset later. Moreover, when the liquid is stopped, when the valve core is reset by the elastic member, the rotating component provided can also rotate the valve core. The rotation of the valve core can drive the second sealing ring thereon to change its position. Because when the liquid flows, its flow path is to hit the valve core, pass through the space between the valve core and the inspection port, The valve core is then pressed against the valve stem to release the second sealant, which in turn causes the valve to rotate relative to the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2It is a schematic diagram of the valve body structure of the present invention;

[0030] Figure 3 yes Figure 2 A schematic diagram of the enlarged local structure at point A in the middle;

[0031] Figure 4 is a schematic structural diagram of a first fixing frame of the present invention;

[0032] Figure 5 is a schematic structural diagram of a second fixing frame of the present invention;

[0033] Figure 6 is a cross-sectional schematic diagram of the valve core structure of the present invention;

[0034] Figure 7 It is a schematic diagram of the connecting shaft structure of the present invention;

[0035] Figure 8 It is a schematic diagram of the box structure of the present invention;

[0036] Fig. 9 It is a schematic diagram of the connecting ring structure of the present invention;

[0037] Fig.10 It is a schematic diagram of the connecting pipe structure of the present invention;

[0038] Fig.11 It is a schematic diagram of the rotating shaft structure of the present invention.

[0039] Reference numerals:

[0040] 100, valve body; 101, water inlet; 102, water outlet; 103, inspection port; 104, first ring; 105, second ring; 106, valve seat; 107, valve core; 108, first sealing ring; 109, second sealing ring; 110, oblique opening; 111, elastic member; 112, cleaning brush;

[0041] 200, box body; 201, side opening; 202, top plate; 203, connecting rod; 204, first spring; 205, fixed axis; 206, third spring; 207, first traction rope;

[0042] 300, connecting opening; 301, fixing plate; 302, connecting shaft; 303, connecting frame; 304, connecting ring; 305, connecting rod; 306, bracket; 307, limiting rod; 308, fourth spring; 309, receiving port;

[0043] 400, first fixing frame; 401, connecting pipe; 402, blade; 403, telescopic rod; 404, first rod; 405, second rod; 406, fifth spring;

[0044] 500, second fixed frame; 501, sliding shaft; 502, support rod; 503, rotating shaft; 504, sixth spring; 505, first gear; 506, second gear; 507, second traction rope; 508, ratchet mechanism; 509, third sealing ring. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0046] refer to Figure 1-Figure 11 , a pressure-sealed piston valve cover check valve mechanism, comprising:

[0047] The valve body 100 includes a water inlet 101, a water outlet 102 and an inspection port 103;

[0048] The first ring 104, the second ring 105 and the valve seat 106 are arranged in the valve body 100. The first ring 104 and the valve seat 106 are located between the water inlet 101 and the inspection port 103.

[0049] A valve core 107 disposed between the valve seat 106 and the second ring 105;

[0050] A first sealing ring 108 is provided on the valve seat 106 and a second sealing ring 109 is provided on the valve core 107. The first sealing ring 108 and the second sealing ring 109 are respectively provided with an oblique opening 110.

[0051] An elastic member 111 disposed between the valve core 107 and the second ring 105;

[0052] The cleaning portion provided between the valve seat 106 and the valve core 107 is used to clean the first sealing ring 108 when the liquid passes through the valve body 100;

[0053] A rotating component disposed between the valve core 107 and the second ring 105, used to rotate the valve core 107 at a preset angle when the valve core 107 moves toward the valve seat 106;

[0054] The moving part is arranged in the valve body 100, and is used to move the position of the cleaning part when the valve core 107 moves toward the second ring 105, and the cleaning part moves toward the inner wall of the valve body 100;

[0055] The cleaning part includes a cleaning brush 112, which can rotate when the cleaning part moves to a preset position on the inner wall of the valve body 100, and contact the oblique opening 110 on the first sealing ring 108;

[0056] By setting the valve body 100, when in use, the operator can connect the liquid delivery pipeline to the flange on the valve body 100, and the liquid delivered by the liquid delivery pipeline can enter the valve body 100 from the liquid inlet. The pressure increase in the valve body 100 will press the position of the valve core 107, so that the valve core 107 compresses the elastic member 111 to move, and the first sealing ring 108 on the valve seat 106 and the second sealing ring 109 on the valve core 107 are separated. The liquid can reach the position of the second ring 105 from the gap between the valve core 107 and the valve seat 106 and the inspection port 103, so as to flow out from the second ring 105 and the water outlet 102. When the delivery of liquid stops, the pressure in the valve body 100 disappears. At this time, the elastic member 111 releases the potential energy to reset the valve core 107, and utilizes The pressure of the elastic member 111 can make the second sealing ring 109 squeeze the first sealing ring 108, so that the oblique openings 110 of the two are adapted and squeezed. When the first sealing ring 108 and the second sealing ring 109 squeeze each other, the second sealing ring 109 will expand to a certain extent due to the setting of the oblique opening 110, so as to increase the sealing performance after the two are in contact, and improve the effect of non-return blocking. Furthermore, when the valve core 107 moves toward the second ring 105 due to the pressure of the liquid, the provided moving component can move the cleaning part, and the cleaning part moves toward the inner wall of the valve body 100. When the cleaning part moves to a preset position, the cleaning brush 112 can rotate, and the bristles of the cleaning brush 112 can contact the oblique opening 110 of the first sealing ring 108. When the liquid passes through the valve body 10 0, the cleaning portion can also rotate, and the bristles of the cleaning brush 112 can contact the oblique opening 110, so that the cleaning brush 112 can rotate with the axis of the valve body 100 to clean the first sealing ring 108. When the liquid is transported, the liquid will be blocked by the valve core 107, and the liquid will hit the valve core 107. The impact force of the water flow can be used to clean the second sealing ring 109 on the valve core 107, and the first sealing ring 108 is opposite to the flow direction of the liquid. Therefore, the cleaning brush 112 can be used to remove the material deposited on the first sealing ring 108, and the first sealing ring 108 and the second sealing ring 109 can be cleaned to ensure the sealing performance when the valve core 107 is reset later. In addition, when the liquid transportation stops, the valve core 107 is closed. When the elastic member 111 is reset, the rotating component can also rotate the valve core 107. The rotation of the valve core 107 can drive the second sealing ring 109 thereon to change its position. When the liquid flows, its flow path is to hit the valve core 107, pass through the channel formed between the valve core 107 and the inspection port 103, and then pass through the second ring 105. That is, after the valve core 107 moves due to the pressure of the liquid, a certain section of the second sealing ring 109 corresponding to the inspection port 103 will increase the wear relative to other parts due to the impact of the liquid. For this reason, the rotating component is set to allow the valve core 107 to rotate when it is reset. The preset rotation angle can change the position of the second sealing ring 109 thereon, so that different parts correspond to the inspection port 103 to balance the wear degree of the second sealing ring 109.The second sealing ring 109 is prevented from being poorly sealed due to partial wear. Compared with the check valve mechanism in the prior art, the present invention can solve the problem that impurities are easily accumulated at the contact position of the valve disc, and the elastic sealing ring will be worn after long-term use, which may lead to sealing failure.

[0057] As a further solution of the present invention, the cleaning part includes a plurality of box bodies 200 arranged between the valve seat 106 and the valve core 107, a side opening 201 is opened on one side of the box body 200, a cleaning brush 112 is arranged in the box body 200 and extends to the outside through the side opening 201, a top plate 202 is arranged on the top of the box body 200, a connecting rod 203 is connected to the bottom of the top plate 202, a first spring 204 is connected between the top plate 202 and the box body 200, a fixed shaft 205 is rotatably connected in the box body 200, the cleaning brush 112 is fixed on the fixed shaft 205, a third spring 206 is connected between the cleaning brush 112 and the box body 200, a first traction rope 207 is wound on the fixed shaft 205, and one end of the first traction rope 207 is connected to the connecting rod 203;

[0058] By setting the top plate 202, the cleaning brush 112 is accommodated in the interior of the box body 200 in the initial state. When the box body 200 moves to a preset position toward the inner wall of the valve body 100, the top plate 202 contacts the inner wall of the valve body 100. At this time, the movement of the top plate 202 is restricted, and the box body 200 continues to move. The top plate 202 and the connecting rod 203 move relative to the box body 200, and the first traction rope 207 can be pulled. When the first traction rope 207 is pulled, the fixed shaft 205 and the cleaning brush 112 on the fixed shaft 205 can be rotated, so as to achieve the purpose of rotating the cleaning brush 112 when the box body 200 moves to the preset position, so that the cleaning brush 112 contacts the oblique opening 110 of the first sealing ring 108, so as to cooperate with the subsequent rotation of the box body 200 to achieve the effect of cleaning the oblique opening 110.

[0059] As a further solution of the present invention, the moving part includes a connecting opening 300 opened on the valve core 107, a fixing plate 301 is arranged in the connecting opening 300, the valve core 107 is rotatably connected to the fixing plate 301 through the connecting opening 300, a connecting shaft 302 is connected to one side of the fixing plate 301, a connecting frame 303 is connected to the fixing plate 301, a connecting ring 304 sleeved on the connecting shaft 302 is rotatably connected to the connecting frame 303, a connecting ring 304 is rotatably connected to the connecting ring 304, and a connecting rod 305 is rotatably connected to the box body 200 at the other end;

[0060] By setting the fixing plate 301, when the liquid pressure in the valve body 100 causes the valve core 107 to move, the fixing plate 301 can be driven to move. The movement of the fixing plate 301 can drive the connecting shaft 302 and the connecting frame 303 to move the connecting ring 304. The connecting ring 304 can touch the position of the box body 200 through the connecting rod 305 to achieve the purpose of moving the box body 200 toward the inner wall of the valve body 100.

[0061] As a further solution of the present invention, a bracket 306 is rotatably connected to the valve seat 106, a limit rod 307 slidably connected to the box body 200 is connected to the bracket 306, and a fourth spring 308 is connected between the box body 200 and the bracket 306;

[0062] By setting the bracket 306, the bracket 306 and the limiting rod 307 can limit the position of the box body 200. After the box body 200 is displaced, the fourth spring 308 can be stretched to facilitate the subsequent resetting of the box body 200. When in use, the connecting ring 304 can be rotated. The rotation of the connecting ring 304 can allow the box body 200 to rotate through the connecting rod 305. The rotation of the box body 200 can allow the bracket 306 to rotate through the limiting rod 307, so as to ensure that the bracket 306 and the limiting rod 307 limit the box body 200 while avoiding affecting the rotation of the box body 200.

[0063] As a further solution of the present invention, a receiving port 309 is provided on one side of the valve core 107;

[0064] By setting the receiving port 309, when the valve core 107 is reset toward the valve seat 106, the box body 200 is reset toward the connecting shaft 302 by the force of the fourth spring 308, and when the second sealing ring 109 on the valve core 107 contacts the first sealing ring 108 on the valve seat 106, the box body 200 can shrink to the extreme position. At this time, the receiving port 309 set can be used for avoidance and to accommodate the position of the box body 200, so as to avoid the problem that the valve core 107 touches the box body 200 and the first sealing ring 108 and the second sealing ring 109 cannot fit together.

[0065] As a further solution of the present invention, the first ring 104 is connected to a first fixing frame 400, and a connecting pipe 401 sleeved with the connecting shaft 302 is rotatably connected to the first fixing frame 400, and a blade 402 is provided on the connecting pipe 401, and a telescopic rod 403 is connected between the blade 402 and the connecting ring 304;

[0066] By setting the blade 402, when the liquid enters the valve body 100 and passes through the first ring 104 and the valve seat 106, the flow of the liquid will push the blade 402 to rotate. The rotation of the blade 402 can rotate the connecting ring 304 through the telescopic rod 403, so as to achieve the purpose of providing driving force for the rotation of the connecting ring 304 and the box body 200.

[0067] As a further solution of the present invention, the telescopic rod 403 includes a first rod 404 connected to the blade 402, a second rod 405 connected to the first rod 404 in a sliding manner is connected to the connecting ring 304, and a fifth spring 406 is connected between the first rod 404 and the second rod 405;

[0068] By providing the first rod 404 and the second rod 405 , while ensuring that the connecting ring 304 can be displaced, when the subsequent blades 402 rotate, the connecting ring 304 can also rotate through the first rod 404 and the second rod 405 .

[0069] As a further solution of the present invention, the rotating component includes a second fixed frame 500 connected to the second ring 105, a sliding shaft 501 connected to the fixed plate 301 is slidably connected to the second fixed frame 500, an elastic member 111 is connected between the fixed plate 301 and the second fixed frame 500, a support rod 502 is connected to the fixed plate 301, a rotating shaft 503 is rotatably connected to the support rod 502, a sixth spring 504 is connected between the rotating shaft 503 and the support rod 502, a first gear 505 is provided on the rotating shaft 503, a second gear 506 meshing with the first gear 505 is connected to the valve core 107, a second traction rope 507 is connected to the second fixed frame 500, and one end of the second traction rope 507 is wound around the rotating shaft 503;

[0070] By setting the sixth spring 504, the potential energy of the elastic member 111 is greater than the sixth spring 504. In the initial state, the sixth spring 504 is in a torsion state. When the valve core 107 moves toward the second ring 105, the distance between the valve core 107 and the second ring 105 gradually shortens, and the sixth spring 504 gradually releases the potential energy. The shaft 503 rotates to reel in the second traction rope 507. When the valve core 107 is subsequently reset to the valve seat 106, the second ring 105 can pull the second traction rope 507 to allow the second traction rope 507 to rotate the shaft 503, so that the shaft 503 rotates through the first gear 505 and the second gear 506 to rotate the valve core 107, thereby achieving the purpose of rotating the valve core 107 when the valve core 107 moves toward the valve seat 106.

[0071] As a further solution of the present invention, a ratchet mechanism 508 is provided between the rotating shaft 503 and the first gear 505;

[0072] By setting up the ratchet mechanism 508, when the valve core 107 moves toward the second ring 105, the rotating shaft 503 can idle in the first gear 505. When the valve core 107 moves toward the valve seat 106, the rotating shaft 503 can allow the first gear 505 to rotate along with it through the ratchet mechanism 508, so as to achieve the purpose of rotating the valve core 107 by a preset angle when the valve core 107 moves toward the valve seat 106 to change the position of the second sealing ring 109 corresponding to the inspection port 103. The ratchet mechanism 508 is set to avoid the problem of rotation when the valve core 107 moves toward the second ring 105.

[0073] As a further solution of the present invention, a third sealing ring 509 is provided between the fixing plate 301 and the valve core 107;

[0074] By setting the third sealing ring 509, the third sealing ring 509 can seal between the fixed plate 301 and the valve core 107 to avoid liquid leakage. At the same time, the third sealing ring 509 is accommodated between the fixed plate 301 and the valve core 107 and does not contact with the liquid. It can ensure that the valve core 107 can rotate on the fixed plate 301 while ensuring the sealing performance between the two.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure-sealed piston valve cover check valve mechanism, characterized in that: include: A valve body (100), the valve body (100) comprising a water inlet (101), a water outlet (102) and an inspection port (103); a first ring (104), a second ring (105) and a valve seat (106) arranged in the valve body (100), the first ring (104) and the valve seat (106) being located between the water inlet (101) and the inspection port (103), and a valve core (107) being arranged between the valve seat (106) and the second ring (105); A first sealing ring (108) provided on the valve seat (106) and a second sealing ring (109) provided on the valve core (107), wherein the first sealing ring (108) and the second sealing ring (109) are respectively provided with an oblique opening (110); an elastic member (111) disposed between the valve core (107) and the second ring (105); a cleaning portion provided between the valve seat (106) and the valve core (107), used for cleaning the first sealing ring (108) when liquid passes through the valve body (100); a rotating component provided between the valve core (107) and the second ring (105), used for rotating the valve core (107) by a preset angle when the valve core (107) moves toward the valve seat (106); a moving component disposed in the valve body (100), used to move the position of the cleaning portion when the valve core (107) moves toward the second ring (105), and the cleaning portion moves toward the inner wall of the valve body (100); The cleaning portion comprises a cleaning brush (112), and the cleaning brush (112) is capable of rotating when the cleaning portion moves toward the inner wall of the valve body (100) to a preset position, so as to contact the oblique opening (110) on the first sealing ring (108); The cleaning portion comprises a plurality of box bodies (200) arranged between the valve seat (106) and the valve core (107); a side opening (201) is provided on one side of the box body (200); the cleaning brush (112) is arranged in the box body (200) and extends to the outside through the side opening (201); a top plate (202) is provided on the top of the box body (200); a connecting rod (203) is connected to the bottom of the top plate (202); and the top plate (202) is provided with a connecting rod (203). A first spring (204) is connected to the box body (200), a fixed shaft (205) is rotatably connected inside the box body (200), the cleaning brush (112) is fixed on the fixed shaft (205), a third spring (206) is connected between the cleaning brush (112) and the box body (200), a first traction rope (207) is wound on the fixed shaft (205), and one end of the first traction rope (207) is connected to the connecting rod (203); The moving component comprises a connecting opening (300) opened on the valve core (107), a fixing plate (301) is arranged in the connecting opening (300), the valve core (107) is rotatably connected to the fixing plate (301) through the connecting opening (300), a connecting shaft (302) is connected to one side of the fixing plate (301), a connecting frame (303) is connected to the fixing plate (301), a connecting ring (304) sleeved on the connecting shaft (302) is rotatably connected to the connecting frame (303), a connecting rod (305) is rotatably connected to the connecting ring (304), and the other end of the connecting rod (305) is rotatably connected to the box body (200); A bracket (306) is rotatably connected to the valve seat (106), a limit rod (307) slidably connected to the box body (200) is connected to the bracket (306), and a fourth spring (308) is connected between the box body (200) and the bracket (306); The rotating component comprises a second fixing frame (500) connected to the second ring (105); a sliding shaft (501) connected to the fixing plate (301) is slidably connected to the second fixing frame (500); the elastic member (111) is connected between the fixing plate (301) and the second fixing frame (500); a support rod (502) is connected to the fixing plate (301); a rotating shaft (503) is rotatably connected to the support rod (502); a sixth spring (504) is connected between the rotating shaft (503) and the support rod (502); a first gear (505) is provided on the rotating shaft (503); a second gear (506) meshing with the first gear (505) is connected to the valve core (107); a second traction rope (507) is connected to the second fixing frame (500); one end of the second traction rope (507) is wound around the rotating shaft (503).

2. A pressure-sealed piston valve cover check valve mechanism according to claim 1, characterized in that: A receiving opening (309) is provided on one side of the valve core (107).

3. A pressure-sealed piston valve cover check valve mechanism according to claim 1, characterized in that: The first ring (104) is connected to a first fixing frame (400), the first fixing frame (400) is rotatably connected to a connecting tube (401) sleeved on the connecting shaft (302), the connecting tube (401) is provided with blades (402), and a telescopic rod (403) is connected between the blades (402) and the connecting ring (304).

4. A pressure-sealed piston valve cover check valve mechanism according to claim 3, characterized in that: The telescopic rod (403) comprises a first rod (404) connected to the blade (402); a second rod (405) slidably connected to the first rod (404) is connected to the connecting ring (304); and a fifth spring (406) is connected between the first rod (404) and the second rod (405).

5. A pressure-sealed piston valve cover check valve mechanism according to claim 1, characterized in that: A ratchet mechanism (508) is provided between the rotating shaft (503) and the first gear (505).

6. A pressure-sealed piston valve cover check valve mechanism according to claim 1, characterized in that: A third sealing ring (509) is provided between the fixing plate (301) and the valve core (107).

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