Anti-blocking check valve with linkage pollution discharge function

Abstract

The invention provides an anti-blocking check valve with linkage pollution discharge, and belongs to the field of check valves, the anti-blocking check valve comprises a valve body, a connecting flange plate and a shell, the connecting flange plate is fixedly connected to the outer wall of the valve body, the shell is fixedly connected to the outer wall of the valve body, the anti-blocking check valve further comprises a filter assembly located in the valve body, and a cleaning assembly located in the valve body and used for cleaning the valve body. The cleaning assembly is located in the valve body, and the stacking assembly is located at the bottom of the valve body. According to the device, the motor is started, the motor drives the eccentric wheel to rotate through the output shaft, so that the eccentric wheel collides with the filter screen, pressure is applied to the first spring, and when impact force generated by collision acts on the surface of the filter screen, impurities adsorbed on the surface of the filter screen can be separated from the filter screen under the action of the impact force; the problems that in the using process of an existing check valve, impurities in a liquid medium cannot be filtered, a large number of impurities block a valve gate, and normal use of the valve gate is affected are solved.

Description

Technical Field

[0001] The present invention relates to the field of check valves, and more particularly, to an anti-clogging check valve with linkage sewage discharge. Background Art

[0002] A check valve refers to a valve whose closing member is a circular valve flap and which uses its own weight and the pressure of the medium to block the reverse flow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, a one-way valve, a reflux valve or an isolation valve. A check valve is commonly used as the bottom valve of a pumping device to prevent the backflow of water. When used in combination with a globe valve, it can play a role in safety isolation. The disadvantages are high resistance and poor sealing when closed.

[0003] When the existing check valve is used in a place with a poor working environment, due to the large amount of impurities contained in the liquid medium, it is easily blocked by the solid impurities mixed in the liquid after long-term use, resulting in the valve gate being stuck and the need to disassemble the check valve for repair, which is very inconvenient. How to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] To make up for the above deficiencies, the present invention provides an anti-clogging check valve with linkage sewage discharge, aiming to solve the problem that during the use of the existing check valve, the impurities in the liquid medium cannot be filtered, resulting in a large amount of impurities blocking the valve gate and affecting the normal use of the valve gate.

[0005] The present invention is implemented as follows:

[0006] The present invention provides an anti-clogging check valve with linkage sewage discharge, including a valve body, a connecting flange and a housing. The connecting flange is fixedly connected to the outer wall of the valve body, and the housing is fixedly connected to the outer wall of the valve body. It further includes:

[0007] A filtering assembly, which is located inside the valve body and is used to filter the fluid flowing inside the valve body.

[0008] A cleaning assembly, which is located inside the valve body and is used to clean the surface of the filtering structure inside the filtering assembly, so as to ensure the filtering effect of the filtering structure.

[0009] A stacking assembly, which is located at the bottom of the valve body and is used to stack and store the impurities cleaned by the cleaning assembly.

[0010] Preferably, the filtering component includes a filter screen, a motor, an eccentric wheel, a slide bar, an arc plate and a first spring. The filter screen is arranged inside the valve body. The motor is fixedly connected to the inner wall of the housing. The eccentric wheel is arranged inside the valve body. The slide bar is fixedly connected to the outer wall of the filter screen. The arc plate is fixedly connected to the inner wall of the valve body. The first spring is fixedly connected to the outer wall of the arc plate.

[0011] Preferably, the outer wall of the filter screen is slidably connected to the inner wall of the valve body. The output shaft of the motor penetrates the outer wall of the valve body and extends into the valve body. The output shaft of the motor is rotatably connected to the inner wall of the valve body through which it penetrates. The top of the eccentric wheel is fixedly connected to one end of the output shaft of the motor extending into the valve body. The outer wall of the eccentric wheel abuts against the outer wall of the filter screen.

[0012] By adopting the above technical solution, the filter screen can slide inside the valve body. After the motor is started, the eccentric wheel can be driven to rotate through the output shaft. When the eccentric wheel rotates, it can push the filter screen to move.

[0013] Preferably, the slide bar penetrates the arc plate and extends outside the arc plate. The outer wall of the slide bar is slidably connected to the inner wall of the arc plate through which it penetrates. The side of the first spring away from the arc plate is fixedly connected to the outer wall of the filter screen.

[0014] By adopting the above technical solution, the cooperation between the slide bar and the arc plate can ensure the stability of the filter screen during the movement. When the filter screen moves, it can push the slide bar to slide inside the arc plate, thereby applying pressure to the first spring, so that the first spring can push the filter screen to reset.

[0015] Preferably, the cleaning component includes a fixed rod, a triangular plate, a cylinder, a second spring, a threaded rod, a scraper and a rotating shaft. The fixed rod is fixedly connected to the inner wall of the valve body. The triangular plate is arranged inside the valve body. The cylinder is arranged inside the valve body. The second spring is fixedly connected inside the cylinder. The threaded rod is arranged inside the cylinder. The scraper is arranged on the outer wall of the filter screen. The rotating shaft is rotatably connected to the inside of the filter screen.

[0016] Preferably, the triangular plate is located on the outer wall of the fixed rod. The outer wall of the cylinder is fixedly connected to the outer wall of the fixed rod. The outer wall of the second spring is fixedly connected to the outer wall of the threaded rod.

[0017] By adopting the above technical solution, the presence of the triangular plate can divert the fluid flowing inside the valve body, avoiding a large impact force on the fixed rod during the fluid flow, thereby prolonging the service life of the fixed rod. The presence of the fixed rod can support the cylinder and ensure the stability of the cylinder.

[0018] Preferably, one end of the threaded rod penetrates through the cylinder and extends to the outside of the cylinder. The outer wall of the threaded rod is adapted to the inner wall of the cylinder penetrated. The outer walls of the scraping plate are fixedly connected to one end of the threaded rod extending to the outside of the cylinder and one end of the rotating shaft respectively.

[0019] By adopting the above technical solution, when the threaded rod moves inside the cylinder, it will rotate under the action of the thread. When the filter screen moves, the threaded rod can be driven to move through the rotating shaft and the scraping plate.

[0020] Preferably, the stacking assembly includes a drainage frame, a stacking bin, a sliding frame, a sealing strip, a fixing plate, bolts, nuts, a slide rail and a closing plate. The drainage frame is fixedly connected to the bottom of the valve body. The stacking bin is arranged at the bottom of the drainage frame. The sliding frame is fixedly connected to the top of the stacking bin. The sealing strip is fixedly connected to the top of the sliding frame. The fixing plate is fixedly connected to the outer wall of the stacking bin. The bolts are arranged on the outer wall of the fixing plate. The nuts are arranged on the outer wall of the fixing plate. The slide rail is opened inside the valve body. The closing plate is fixedly connected to the bottom of the filter screen.

[0021] Preferably, the sliding frame is located inside the drainage frame and is slidably connected to the inner wall of the drainage frame. The fixing plates are distributed on the outer walls of the drainage frame and the stacking bin. The bolts are adapted to the nuts. The closing plate is located inside the slide rail and is slidably connected to the inner wall of the slide rail.

[0022] By adopting the above technical solution, the stacking bin can be moved by sliding, so that the sliding frame moves to the inside of the drainage frame. The fixation between the drainage frame and the stacking bin can be completed by using bolts and nuts. When the filter screen moves, the closing plate can be driven to move inside the slide rail.

[0023] The beneficial effects of the present invention are:

[0024] 1. Start the motor. The motor drives the eccentric wheel to rotate through the output shaft, so that a collision occurs between the eccentric wheel and the filter screen, and a pressure is applied to the first spring. When the impact force generated by the collision acts on the surface of the filter screen, the impurities adsorbed on the surface of the filter screen will be separated from the filter screen under the action of the impact force, solving the problem that in the existing check valve during use, impurities in the liquid medium cannot be filtered, resulting in a large amount of impurities blocking the valve gate and affecting the normal use of the valve gate. At the same time, when the first spring pushes the filter screen to reset, the fluid inside the valve body will generate a backwash on the filter screen during the reset process, thereby further cleaning the filter screen, flushing out the impurities adsorbed inside the filter screen, further improving the cleaning effect of the filter screen and prolonging the service life of the filter screen.

[0025] 2. Driven by the eccentric wheel and Spring 1, the filter screen will move horizontally back and forth inside the valve body. At this time, the filter screen will push the threaded rod to move inside the cylinder through the rotating shaft. Since the inner wall of the threaded rod fits the inner wall of the cylinder, when the filter screen moves back and forth, the threaded rod will rotate inside the cylinder under the action of the thread and drive the scraper to rotate on the surface of the filter screen, further improving the cleaning effect of the impurities on the surface of the filter screen and avoiding the accumulation of impurities.

[0026] 3. When the fluid flows inside the valve body, it will enter the accumulation bin through the drainage frame. Since the accumulation bin is rectangular and the drainage frame is located on the upper right side of the accumulation bin, the fluid will flow towards the left side inside the accumulation bin under the action of the impact force after entering the accumulation bin, which effectively prevents the fluid flowing into the accumulation bin from flowing back into the valve body through the drainage frame under the action of the impact force. Moreover, the accumulation bin can collect the impurities separated from the surface of the filter screen, facilitating the subsequent cleaning operation of the impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 is the overall structural schematic diagram of an anti-blocking check valve with linkage sewage discharge provided by the embodiment of the present invention;

[0029] Figure 2 is the structural schematic diagram of the accumulation component of an anti-blocking check valve with linkage sewage discharge provided by the embodiment of the present invention;

[0030] Figure 3 is the internal structural schematic diagram of the valve body of an anti-blocking check valve with linkage sewage discharge provided by the embodiment of the present invention;

[0031] Figure 4 is the present invention Figure 3 magnified schematic diagram of the structure at A;

[0032] Figure 5 is the structural schematic diagram of the filter screen of an anti-blocking check valve with linkage sewage discharge provided by the embodiment of the present invention;

[0033] Figure 6 is the structural schematic diagram of the closing plate of an anti-blocking check valve with linkage sewage discharge provided by the embodiment of the present invention;

[0034] Figure 7 This is a schematic structural diagram of a cleaning component of an anti-blocking check valve with linkage sewage discharge provided by an embodiment of the present invention;

[0035] Figure 8 This is a schematic internal structure diagram of a cylinder of an anti-blocking check valve with linkage sewage discharge provided by an embodiment of the present invention.

[0036] In the figure: 1, valve body; 2, connecting flange; 3, outer shell; 4, filtering component; 401, filter screen; 402, motor; 403, eccentric wheel; 404, sliding rod; 405, arc plate; 406, first spring; 5, cleaning component; 501, fixed rod; 502, triangular plate; 503, cylinder; 504, second spring; 505, threaded rod; 506, scraping plate; 507, rotating shaft; 6, accumulation component; 601, drainage frame; 602, accumulation bin; 603, sliding frame; 604, sealing strip; 605, fixing plate; 606, bolt; 607, nut; 608, slide rail; 609, closing plate. Specific embodiments

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Refer to Figures 1-8 , an anti-blocking check valve with linkage sewage discharge, including a valve body 1, a connecting flange 2, and an outer shell 3. The connecting flange 2 is fixedly connected to the outer wall of the valve body 1, and the outer shell 3 is fixedly connected to the outer wall of the valve body 1. It further includes:

[0039] A filtering component 4, which is located inside the valve body 1 and is used to filter the fluid flowing inside the valve body 1.

[0040] A cleaning component 5, which is located inside the valve body 1 and is used to clean the surface of the filtering structure inside the filtering component 4, thereby ensuring the filtering effect of the filtering structure.

[0041] An accumulation component 6, which is located at the bottom of the valve body 1 and is used to accumulate and store the impurities cleaned by the cleaning component 5.

[0042] The filtering component 4 includes a filter screen 401, a motor 402, an eccentric wheel 403, a slide bar 404, an arc plate 405 and a first spring 406. The filter screen 401 is arranged inside the valve body 1. The motor 402 is fixedly connected to the inner wall of the housing 3. The eccentric wheel 403 is arranged inside the valve body 1. The slide bar 404 is fixedly connected to the outer wall of the filter screen 401. The arc plate 405 is fixedly connected to the inner wall of the valve body 1. The first spring 406 is fixedly connected to the outer wall of the arc plate 405.

[0043] It should be noted that: the outer wall of the filter screen 401 is slidably connected to the inner wall of the valve body 1, and the filter screen 401 can slide inside the valve body 1. The output shaft of the motor 402 penetrates the outer wall of the valve body 1 and extends into the valve body 1. The output shaft of the motor 402 is rotatably connected to the inner wall of the valve body 1 that is penetrated. The top of the eccentric wheel 403 is fixedly connected to one end of the output shaft of the motor 402 extending into the valve body 1. After the motor 402 is started, the eccentric wheel 403 can be driven to rotate through the output shaft. The outer wall of the eccentric wheel 403 abuts against the outer wall of the filter screen 401. When the eccentric wheel 403 rotates, the filter screen 401 can be pushed to move. The slide bar 404 penetrates the arc plate 405 and extends outside the arc plate 405. The outer wall of the slide bar 404 is slidably connected to the inner wall of the arc plate 405 that is penetrated. The cooperation between the slide bar 404 and the arc plate 405 can ensure the stability of the filter screen 401 during the movement. The side of the first spring 406 away from the arc plate 405 is fixedly connected to the outer wall of the filter screen 401. When the filter screen 401 moves, the slide bar 404 can be pushed to slide inside the arc plate 405, thereby applying pressure to the first spring 406, so that the first spring 406 can push the filter screen 401 to reset.

[0044] When the motor 402 is started, the motor 402 drives the eccentric wheel 403 to rotate through the output shaft, so that a collision occurs between the eccentric wheel 403 and the filter screen 401, and pressure is applied to the first spring 406. When the impact force generated by the collision acts on the surface of the filter screen 401, the impurities adsorbed on the surface of the filter screen 401 will be separated from the filter screen 401 under the action of the impact force, solving the problem that in the existing check valve during use, impurities in the liquid medium cannot be filtered, resulting in a large amount of impurities blocking the valve gate and affecting the normal use of the valve gate. At the same time, when the first spring 406 pushes the filter screen 401 to reset, the fluid inside the valve body 1 will generate a backwash on the filter screen 401 during the reset process, thereby further cleaning the filter screen 401, flushing out the impurities adsorbed inside the filter screen 401, further improving the cleaning effect of the filter screen 401 and extending the service life of the filter screen 401.

[0045] Start the motor 402. The motor 402 drives the eccentric wheel 403 to rotate through the output shaft. When the eccentric wheel 403 rotates, it pushes the filter screen 401 to slide inside the valve body 1, and the filter screen 401 pushes the slide bar 404 to move and applies pressure to the first spring 406. After the eccentric wheel 403 resets, the first spring 406 pushes the filter screen 401 to reset, enabling the fluid inside the valve body 1 to clean the filter screen 401.

[0046] The cleaning assembly 5 includes a fixed rod 501, a triangular plate 502, a cylinder 503, a second spring 504, a threaded rod 505, a scraper 506, and a rotating shaft 507. The fixed rod 501 is fixedly connected to the inner wall of the valve body 1. The triangular plate 502 is arranged inside the valve body 1. The cylinder 503 is arranged inside the valve body 1. The second spring 504 is fixedly connected inside the cylinder 503. The threaded rod 505 is arranged inside the cylinder 503. The scraper 506 is arranged on the outer wall of the filter screen 401. The rotating shaft 507 is rotatably connected inside the filter screen 401.

[0047] It should be noted that: The triangular plate 502 is located on the outer wall of the fixed rod 501. The outer wall of the cylinder 503 is fixedly connected to the outer wall of the fixed rod 501. The presence of the triangular plate 502 can divert the fluid flowing inside the valve body 1, avoiding a large impact force on the fixed rod 501 during the fluid flow, thereby extending the service life of the fixed rod 501. The presence of the fixed rod 501 can support the cylinder 503 and ensure the stability of the cylinder 503. The outer wall of the second spring 504 is fixedly connected to the outer wall of the threaded rod 505. One end of the threaded rod 505 penetrates the cylinder 503 and extends to the outside of the cylinder 503. The outer wall of the threaded rod 505 is adapted to the inner wall of the cylinder 503 penetrated. When the threaded rod 505 moves inside the cylinder 503, it will rotate under the action of the thread. The outer wall of the scraper 506 is fixedly connected to one end of the threaded rod 505 extending to the outer wall of the cylinder 503 and one end of the rotating shaft 507. When the filter screen 401 moves, it can drive the threaded rod 505 to move through the rotating shaft 507 and the scraper 506.

[0048] Driven by the eccentric wheel 403 and the first spring 406, the filter screen 401 will move horizontally back and forth inside the valve body 1. At this time, the filter screen 401 will push the threaded rod 505 to move inside the cylinder 503 through the rotating shaft 507. Since the inner wall of the threaded rod 505 is adapted to the inner wall of the cylinder 503, when the filter screen 401 moves back and forth, the threaded rod 505 will rotate inside the cylinder 503 under the action of the thread and drive the scraper 506 to rotate on the surface of the filter screen 401, further improving the cleaning effect of the impurities on the surface of the filter screen 401 and avoiding the accumulation of impurities.

[0049] When the filter screen 401 slides driven by the eccentric wheel 403 and the first spring 406, the rotating shaft 507 and the scraping plate 506 push the threaded rod 505 to move inside the cylinder 503, and apply pressure to the second spring 504. When the threaded rod 505 moves, under the action of the thread, it drives the scraping plate 506 to rotate on the surface of the filter screen 401 and clean the surface of the filter screen 401.

[0050] The accumulation assembly 6 includes a drainage frame 601, an accumulation bin 602, a sliding frame 603, a sealing strip 604, a fixing plate 605, bolts 606, nuts 607, a slide rail 608 and a closing plate 609. The drainage frame 601 is fixedly connected to the bottom of the valve body 1. The accumulation bin 602 is arranged at the bottom of the drainage frame 601. The sliding frame 603 is fixedly connected to the top of the accumulation bin 602. The sealing strip 604 is fixedly connected to the top of the sliding frame 603. The fixing plate 605 is fixedly connected to the outer wall of the accumulation bin 602. The bolts 606 are arranged on the outer wall of the fixing plate 605. The nuts 607 are arranged on the outer wall of the fixing plate 605. The slide rail 608 is opened inside the valve body 1. The closing plate 609 is fixedly connected to the bottom of the filter screen 401.

[0051] It should be noted that: The sliding frame 603 is located inside the drainage frame 601 and is slidably connected to the inner wall of the drainage frame 601. The accumulation bin 602 can be moved by sliding, so that the sliding frame 603 moves to the inside of the drainage frame 601. The fixing plates 605 are distributed on the outer walls of the drainage frame 601 and the accumulation bin 602. The bolts 606 are adapted to the nuts 607. The fixing between the drainage frame 601 and the accumulation bin 602 can be completed by using the bolts 606 and the nuts 607. The closing plate 609 is located inside the slide rail 608 and is slidably connected to the inner wall of the slide rail 608. When the filter screen 401 moves, it can drive the closing plate 609 to move inside the slide rail 608.

[0052] When the fluid flows inside the valve body 1, it will enter the inside of the accumulation bin 602 through the drainage frame 601. Since the accumulation bin 602 is rectangular and the drainage frame 601 is located on the upper right side of the accumulation bin 602, the fluid will flow towards the left side inside the accumulation bin 602 under the action of the impact force after entering the inside of the accumulation bin 602, which well avoids the fluid flowing back into the inside of the valve body 1 through the drainage frame 601 under the action of the impact force. And the accumulation bin 602 can collect the impurities separated from the surface of the filter screen 401, which is convenient for subsequent cleaning operations on the impurities.

[0053] When the filter screen 401 slides driven by the eccentric wheel 403, it will drive the closing plate 609 to move inside the slide rail 608, thereby closing the notch at the bottom of the valve body 1 and avoiding the situation that the fluid directly discharges through the notch and the accumulation bin 602 bypassing the filter screen 401.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A non-return valve with linkage sewage discharge and anti-blocking function, comprising a valve body (1), a connecting flange (2) and a housing (3), wherein the connecting flange (2) is fixedly connected to the outer wall of the valve body (1), and the housing (3) is fixedly connected to the outer wall of the valve body (1), characterized in that: It further includes: A filtering component (4), which is located inside the valve body (1) and is used to filter the fluid flowing inside the valve body (1); A cleaning component (5), which is located inside the valve body (1) and is used to clean the surface of the filtering structure inside the filtering component (4), so as to ensure the filtering effect of the filtering structure; A stacking component (6), which is located at the bottom of the valve body (1) and is used to stack and store the impurities cleaned by the cleaning component (5).

2. The anti-blocking check valve with linkage sewage discharge according to claim 1, wherein: The filtering component (4) includes a filter screen (401), a motor (402), an eccentric wheel (403), a sliding rod (404), an arc plate (405) and a first spring (406). The filter screen (401) is arranged inside the valve body (1), the motor (402) is fixedly connected to the inner wall of the housing (3), the eccentric wheel (403) is arranged inside the valve body (1), the sliding rod (404) is fixedly connected to the outer wall of the filter screen (401), the arc plate (405) is fixedly connected to the inner wall of the valve body (1), and the first spring (406) is fixedly connected to the outer wall of the arc plate (405).

3. The anti-blocking check valve with linkage sewage discharge according to claim 2, characterized in that: The outer wall of the filter screen (401) is slidably connected to the inner wall of the valve body (1). The output shaft of the motor (402) penetrates the outer wall of the valve body (1) and extends into the valve body (1). The output shaft of the motor (402) is rotatably connected to the inner wall of the valve body (1) where it is penetrated. The top of the eccentric wheel (403) is fixedly connected to one end of the output shaft of the motor (402) extending into the valve body (1), and the outer wall of the eccentric wheel (403) abuts against the outer wall of the filter screen (401).

4. The anti-blocking check valve with linkage sewage discharge according to claim 3, characterized in that: The sliding rod (404) penetrates the arc plate (405) and extends outside the arc plate (405). The outer wall of the sliding rod (404) is slidably connected to the inner wall of the arc plate (405) where it is penetrated. The side of the first spring (406) away from the arc plate (405) is fixedly connected to the outer wall of the filter screen (401).

5. The anti-clogging check valve with linkage sewage discharge according to claim 1, characterized in that: The cleaning component (5) includes a fixed rod (501), a triangular plate (502), a cylinder (503), a second spring (504), a threaded rod (505), a scraper (506) and a rotating shaft (507). The fixed rod (501) is fixedly connected to the inner wall of the valve body (1), the triangular plate (502) is arranged inside the valve body (1), the cylinder (503) is arranged inside the valve body (1), the second spring (504) is fixedly connected to the inside of the cylinder (503), the threaded rod (505) is arranged inside the cylinder (503), the scraper (506) is arranged on the outer wall of the filter screen (401), and the rotating shaft (507) is rotatably connected to the inside of the filter screen (401).

6. The anti-clogging check valve with linkage sewage discharge according to claim 5, characterized in that: The triangular plate (502) is located on the outer wall of the fixed rod (501), the outer wall of the cylinder (503) is fixedly connected to the outer wall of the fixed rod (501), and the outer wall of the second spring (504) is fixedly connected to the outer wall of the threaded rod (505).

7. A clogging prevention check valve with linkage sewage discharge according to claim 6, characterized in that: One end of the threaded rod (505) penetrates through the cylinder (503) and extends to the outside of the cylinder (503). The outer wall of the threaded rod (505) is adapted to the inner wall of the cylinder (503) that is penetrated. The outer walls of the scraping plate (506) are fixedly connected to one end of the threaded rod (505) extending to the outer wall of the cylinder (503) and one end of the rotating shaft (507), respectively.

8. The anti-blocking check valve with linkage sewage discharge according to claim 1, characterized in that: The stacking assembly (6) includes a drainage frame (601), a stacking bin (602), a sliding frame (603), a sealing strip (604), a fixing plate (605), a bolt (606), a nut (607), a slide rail (608) and a closing plate (609). The drainage frame (601) is fixedly connected to the bottom of the valve body (1). The stacking bin (602) is arranged at the bottom of the drainage frame (601). The sliding frame (603) is fixedly connected to the top of the stacking bin (602). The sealing strip (604) is fixedly connected to the top of the sliding frame (603). The fixing plate (605) is fixedly connected to the outer wall of the stacking bin (602). The bolt (606) is arranged on the outer wall of the fixing plate (605). The nut (607) is arranged on the outer wall of the fixing plate (605). The slide rail (608) is formed in the valve body (1). The closing plate (609) is fixedly connected to the bottom of the filter screen (401).

9. The anti-blocking check valve with linkage sewage discharge according to claim 8, characterized in that: The sliding frame (603) is located inside the drainage frame (601) and is slidably connected to the inner wall of the drainage frame (601). The fixing plates (605) are distributed on the outer walls of the drainage frame (601) and the stacking bin (602). The bolt (606) is adapted to the nut (607). The closing plate (609) is located inside the slide rail (608) and is slidably connected to the inner wall of the slide rail (608).

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