Check valve

Abstract

The invention discloses a check valve, and relates to the technical field of valves. Comprising a valve body assembly and a control assembly, the valve body assembly comprises a valve pipe, the control assembly comprises a valve clack, a protection assembly sliding transversely is arranged on the valve clack, the protection assembly and the valve clack are connected through a reset assembly, an impact assembly is arranged on the protection assembly, and a sealing assembly for controlling discharging is arranged on the protection assembly. A vibrating striking assembly is arranged in the protection assembly, the protection assembly comprises a filter box, and the filter box is of a semicircular hollow structure. In the initial stage of opening of the valve clack, the filter box is close to the opening position of the valve clack and the valve pipe, the sealing plate can be pulled open by the connecting rod, impurities entering the filter box through the feeding hole can flow out through the discharging hole, and due to the fact that the speed of the impurities is low when the impurities flow out, the impurities cannot flow out. Therefore, when impurities which are doped in the fluid and flow at a high speed impact on impurities which flow slowly, damage to the valve clack can be effectively reduced, and the protection effect on the valve clack is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a check valve. Background Art

[0002] A check valve is a valve used in a pipeline system. Its main function is to prevent the backflow of fluid in the pipeline. It usually only allows the fluid to flow in one direction to ensure the safety and effectiveness of the system. Check valves are commonly used in water treatment, drainage, gas and other fluid delivery systems, including lift check valves, flap check valves, ball check valves, etc. Check valves play an important role in both industrial and civil pipelines, ensuring the stability and safety of the system. Check valves are usually used to transport liquids or gases, including water, oil, gas, steam, etc. Different check valve materials are suitable for different media.

[0003] The check valve with patent publication number CN108266548A includes a valve core and a hollow water flow pipe, the valve core includes a base, a rotating shaft and a check structure, a water flow channel and a connecting structure are arranged on the base, a connecting piece is arranged on the check structure, the check structure and the base are movably connected through a rotating shaft movably assembled on the connecting structure and the connecting piece, and the position of the check structure corresponds to the water flow channel so that the check structure can cover the water flow channel, and the base is arranged in the water flow pipe. The check valve can effectively prevent water backflow and has a long service life.

[0004] In the above and similar technical solutions, when the flap check valve is opened and closed, during the opening process, the gap between the valve flap and the valve body will gradually increase until it is maximized. At this time, the pressure exerted by the water flow on the valve flap will gradually decrease until the valve flap is fully opened. However, at the moment of opening, since the gap between the valve flap and the valve body is the smallest, the pressure exerted by the fluid on the valve flap is the largest at this time, so the fluid will cause certain impact and wear on the valve flap. Since the valve flap is in an unprotected state, the valve flap will be gradually damaged during long-term use, and eventually lead to problems with the sealing performance. Summary of the invention

[0005] The object of the present invention is to provide a check valve to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a check valve, comprising a valve body assembly and a control assembly, the valve body assembly comprising a valve pipe, the control assembly comprising a valve disc, a transversely sliding protection assembly being arranged on the valve disc, the protection assembly and the valve disc being connected via a reset assembly, an impact assembly being arranged on the protection assembly, a closing assembly for controlling the discharge of materials being arranged on the protection assembly, and a vibrating striking assembly being arranged inside the protection assembly; The protection component includes a filter box, which is a semicircular hollow structure, and is respectively provided with a plurality of feed holes and discharge holes. The closing component includes a closing plate, which is attached to the surface of the filter box, and a connecting spring is fixed between the closing plates. A pull rod is rotatably connected to the valve disc, and a connecting rod is fixedly connected between the pull rod and the closing plate, and a plurality of closing blocks are fixed on the filter box. At the beginning of the valve disc rotation, the gap between the valve disc and the valve tube is small, and the fluid pressure is high. The impact component drives the filter box close to the valve tube under the fluid pressure, and the closing plate opens. The impurities that enter the filter box through the feed hole flow out through the discharge hole, forming an impurity protection layer between the valve disc and the valve tube to resist the impact of impurities mixed in the high-pressure fluid on the valve disc; At the end of the valve disc rotation, the gap between the valve disc and the valve tube is the largest, the fluid pressure is small, the reset assembly resets the filter box, the sealing plate closes the discharge hole, the filter box accumulates impurities, and the process is repeated.

[0007] Furthermore, the striking assembly includes a vibration plate, which is fixed between the filter boxes. A plurality of striking blocks are arranged on the vibration plate. A cross bar is fixed between the filter boxes. A baffle plate and a moving block are sleeved on the cross bar. The baffle plate is fixedly connected to the moving block. An extrusion spring is fixed on the moving block. The extrusion spring is sleeved on the cross bar. A plurality of striking springs are fixed on the moving block. A striking ball is fixed on each of the striking springs. The baffle plate and the vibration plate are connected through a sealing assembly. Water flows through a feed hole into between the baffle plate and the vibration plate. Under the action of the sealing assembly and water flow pressure, the baffle plate moves together with the moving block on the cross bar. At this time, under the action of the striking spring, the striking ball will continuously hit the striking block, thereby exerting vibration force on the vibration plate, thereby promoting the normal discharge of the filtered material from the discharge hole. When the fluid pressure decreases, the extrusion spring prompts the moving block to reset.

[0008] Furthermore, the sealing assembly includes a sealing plate and a closing spring, the baffle plate is an I-shaped structure, the closing springs are respectively fixed on the top and bottom of the baffle plate, the sealing plate is fixed on the closing spring, and there is a sealing contact between the sealing plate and the vibrating plate. When the fluid enters between the baffle plate and the vibrating plate through the feed hole, under the action of the sealing plate and the vibrating plate in sealing contact, the fluid will push the baffle plate to move laterally.

[0009] Furthermore, the impact assembly includes an impact plate, a plurality of short rods are fixed on the filter box, and the impact plate is fixed on the short rods. The impact plates are all inclined and expanded outward. When the valve disc rotates, the fluid impacts the impact plate, and the fluid pressure causes the filter box to move laterally.

[0010] Furthermore, the reset assembly includes a reset block and a reset spring. A reset groove is opened on the filter box. The reset spring is fixed in the reset groove. The reset block is fixed to the reset spring. The filter box is fixed on the reset block. The reset block and the reset groove are both in a step-shaped shape. When the impact assembly is impacted by the fluid, the reset block squeezes the reset spring and the filter box moves. When the impact assembly is not impacted by the fluid, the reset spring causes the reset block to reset and the filter box to reset.

[0011] Furthermore, the valve disc is provided with a plurality of discharge grooves and drainage grooves, which are both communicated with the reset grooves, and the filter box is not in contact with the valve disc. When the valve disc is fully opened, the impact assembly is not impacted by the fluid, and the fluid flows through the gap between the valve disc and the filter box, thereby reducing the impact of the fluid on the filter box and facilitating the resetting of the reset block.

[0012] Furthermore, the valve disc is rotatably connected to a plurality of sealing bearings, and the pull rod is fixed on the sealing bearings. When the filter box moves laterally, the pull rod rotates under the action of the sealing bearings, and the closing plate moves in accordance with the filter box under the tension of the connecting spring, leaking out the discharge hole.

[0013] Furthermore, the filter box is provided with filter cotton, which covers part of the feed holes. When the fluid enters between the baffle plate and the vibration plate through the feed holes, the filter cotton filters impurities in the fluid to reduce impurities between the baffle plate and the vibration plate.

[0014] Furthermore, a plurality of docking flanges are fixed on the valve pipe, a rotating ring is arranged on the valve pipe, the rotating ring is connected to the valve disc, a limiting rubber ring is arranged in the valve pipe, and the limiting rubber ring is in contact with the valve disc.

[0015] Compared with the prior art, the present invention has the following beneficial effects: For this check valve, in the initial stage of the valve disc opening, high-pressure fluid will impact on the impact plate, and the fluid pressure will cause the filter box to move laterally. The reset block squeezes the reset spring, so that the filter box is close to the opening position of the valve disc and the valve tube. Since the closing plate is attached to the surface of the filter box and a connecting spring is fixed between the closing plates, a pull rod is rotatably connected to the valve disc, and a connecting rod is fixed between the pull rod and the closing plate. Therefore, the closing plate will be pulled open by the connecting rod, and impurities entering the filter box through the feed hole will flow out through the discharge hole. Since the impurities flow out at a slow speed, when the high-speed flowing impurities mixed in the fluid impact the slower flowing impurities, the damage to the valve disc can be effectively reduced, thereby improving the protection effect of the valve disc.

[0016] At the same time, at the end of the valve disc rotation, that is, when the valve disc is fully open, the gap between the valve disc and the valve tube is the largest, and the fluid pressure is the smallest. Since the filter box and the valve disc are not in contact, when the valve disc is fully open, the fluid will flow through the gap between the valve disc and the filter box, thereby further reducing the impact force of the fluid on the filter box, so that the filter box can be successfully reset under the action of the reset block and the reset spring, and the closing plate will close the discharge hole under the action of the connecting rod and the connecting spring. At this time, impurities entering the filter box will accumulate, achieving a process repetition effect, which is convenient for providing protection to the valve disc again when the valve disc is closed.

[0017] Moreover, when the valve disc is opened, water will flow into between the baffle plate and the vibration plate through two of the feed holes, and the filter cotton will filter the impurities in the fluid to reduce the impurities between the baffle plate and the vibration plate. At this time, under the extrusion of the closing spring, the sealing plate will always maintain a sealed contact with the vibration plate, and the baffle plate will move laterally and move together with the moving block. At this time, under the action of the striking spring, the striking ball will swing irregularly on the striking spring, so that it can continuously hit the striking block, thereby exerting a vibration force on the vibration plate. When impurities accumulate on the vibration plate, the vibration force will promote the normal discharge of the filtered material from the discharge hole, thereby achieving the effect of preventing blockage, and when the fluid pressure decreases, the extrusion spring will cause the moving block to move laterally and reset. During the resetting process, the striking ball will still hit the vibration plate, thereby achieving a continuous knocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the internal structure of the valve tube of the present invention; Figure 4 It is a schematic diagram of the structures of the protection component, the impact component and the sealing component of the present invention; Figure 5 It is a schematic diagram of the leakage structure of the discharge hole of the present invention; Figure 6 It is a schematic diagram of the structure of the reset component of the present invention; Figure 7 It is a schematic diagram of the structure of the striking assembly of the present invention; Figure 8 For the present invention Figure 7 A is an enlarged structural diagram; Fig. 9 It is a schematic diagram of the closed spring structure of the present invention; Fig.10 It is a schematic diagram of the movement result of the striking assembly of the present invention; Fig.11 For the present invention Fig.10 Enlarged structural diagram at point B.

[0019] In the figure: 1. Valve body assembly; 101. Valve pipe; 102. Butt flange; 103. Limiting rubber ring; 2. Control assembly; 201. Rotating ring; 202. Valve disc; 3. Protection assembly; 301. Filter box; 302. Filter cotton; 303. Discharge hole; 304. Feed hole; 4. Impact assembly; 401. Impact plate; 5. Closing assembly; 501. Pull rod; 502. Connecting rod; 503. Connecting spring; 50 4. Closing block; 505. Closing plate; 6. Reset assembly; 601. Reset block; 602. Reset spring; 603. Discharge trough; 604. Drainage trough; 7. Striking assembly; 701. Vibrating plate; 702. Striking block; 703. Shielding plate; 704. Cross bar; 705. Closing spring; 706. Sealing plate; 707. Moving block; 708. Extrusion spring; 709. Striking spring; 710. Striking ball. DETAILED DESCRIPTION

[0020] 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.

[0021] During the opening process of the valve disc, the gap between the valve disc and the valve body is not constant. As the valve disc gradually opens, the gap will gradually increase until it reaches the maximum. At this time, the flow resistance of the fluid decreases, and the pressure exerted by the fluid on the valve disc also decreases. When the valve disc is fully opened, the fluid can pass through the valve smoothly and freely. At the moment the valve disc opens, since the gap between the valve disc and the valve body is the smallest, the pressure exerted by the fluid on the valve disc is the largest at this time. This instantaneous high pressure will cause obvious impact wear to the valve disc. In daily use, the material and structure of the valve disc withstand the strong impact force from the fluid. At the same time, due to being in an unprotected state, its surface has a relatively significant wear. Therefore, the wear degree of the valve disc will gradually increase during long-term use, thereby affecting the overall performance of the valve, especially the decline in sealing performance. Secondly, the wear of the valve disc is not only manifested in the reduction of its surface finish, it will also cause the seal between the valve disc and the valve seat to be loose, thereby causing fluid leakage. Fluid leakage will not only lead to a decrease in system efficiency and increase energy consumption, but also may bring safety hazards. The technical method provided by this application In the initial stage of the valve disc opening, the high-pressure fluid will impact the impact plate, and the fluid pressure will cause the filter box to move laterally. The reset block squeezes the reset spring, so that the filter box is close to the opening position of the valve disc and the valve pipe. The closing plate will be pulled open by the connecting rod, and the impurities entering the filter box through the feed hole will flow out through the discharge hole. Since the impurities flow out at a slow speed, the high-speed impurities mixed in the fluid will effectively reduce the damage to the valve disc when they impact the slower-flowing impurities, thereby improving the protection effect of the valve disc. At the end of the valve disc rotation, that is, When the valve disc is fully open, the gap between the valve disc and the valve tube is the largest and the fluid pressure is the smallest. Since the filter box and the valve disc are not in contact, when the valve disc is fully open, the fluid will flow through the gap between the valve disc and the filter box, thereby further reducing the impact force of the fluid on the filter box, so that the filter box can be successfully reset under the action of the reset block and the reset spring, and the closing plate will close the discharge hole under the action of the connecting rod and the connecting spring. At this time, impurities entering the filter box will accumulate, achieving a process repetition effect, which is convenient for providing protection to the valve disc again when the valve disc is closed.

[0022] like Figure 1-Figure 11As shown, the present invention provides a technical solution: a check valve, including a valve body component 1 and a control component 2, the valve body component 1 includes a valve tube 101, the control component 2 includes a valve disc 202, a transversely sliding protection component 3 is provided on the valve disc 202, the protection component 3 and the valve disc 202 are connected via a reset component 6, an impact component 4 is provided on the protection component 3, a closing component 5 for controlling the discharge is provided on the protection component 3, and a vibrating striking component 7 is provided in the protection component 3; the protection component 3 includes a filter box 301, the filter box 301 is a semicircular hollow structure, a plurality of feed holes 304 and discharge holes 303 are respectively opened on the filter box 301, the closing component 5 includes a closing plate 505, the closing plate 505 is attached to the surface of the filter box 301, a connecting spring 503 is fixed between the closing plates 505, and a pull rod 50 is rotatably connected to the valve disc 202. 1. A connecting rod 502 is fixedly connected between the pull rod 501 and the closing plate 505, and a plurality of closing blocks 504 are fixed on the filter box 301; at the initial stage of the rotation of the valve disc 202, the gap between the valve disc 202 and the valve tube 101 is small, and the fluid pressure is large. The impact component 4 drives the filter box 301 close to the valve tube 101 under the fluid pressure, and the closing plate 505 opens. The impurities entering the filter box 301 through the feed hole 304 flow out through the discharge hole 303, and an impurity protection layer is formed between the valve disc 202 and the valve tube 101 to resist the impact of impurities mixed in the high-pressure fluid on the valve disc 202; at the final stage of the rotation of the valve disc 202, the gap between the valve disc 202 and the valve tube 101 is the largest, and the fluid pressure is small. The reset component 6 resets the filter box 301, and the closing plate 505 closes the discharge hole 303. The filter box 301 accumulates impurities, and the process is repeated.

[0023] It should be noted that when the valve flap 202 is in a vertical state with respect to the valve tube 101, the valve tube 101 is in a closed state and the fluid cannot pass through. When the valve tube 101 is to be opened, the valve flap 202 is rotated by a certain angle. When a gap appears between the valve flap 202 and the valve tube 101, the fluid can flow through the gap, but the pressure of the fluid is at its maximum at this time because the gap is small. When the gap gradually increases, the pressure of the fluid also gradually decreases. When the valve flap 202 is horizontal with the valve tube 101, the valve flap 202 is fully opened and the fluid pressure is at its minimum. Therefore, when the valve flap 202 is opened to the fully opened state, the pressure trend of the fluid is from high to bottom. Conversely, when the valve flap 202 is closed, the pressure trend of the fluid is from low to high until the valve flap 202 is fully closed. Therefore, in the initial stage of the opening of the valve flap 202, the high pressure The fluid with force will impact the impact component 4 and drive the entire filter box 301 to move, so that the filter box 301 is close to the opening position of the valve disc 202 and the valve tube 101. Since the closing plate 505 is attached to the surface of the filter box 301 and a connecting spring 503 is fixed between the closing plates 505, a pull rod 501 is rotatably connected to the valve disc 202, and a connecting rod 502 is fixed between the pull rod 501 and the closing plate 505. Therefore, when the filter box 301 moves horizontally, the closing plate 505 will be pulled open by the connecting rod 502. At this time, impurities entering the filter box 301 through the feed hole 304 will flow out through the discharge hole 303. Since the impurities flow out at a slow speed, when the high-speed flowing impurities mixed in the fluid impact the slower flowing impurities, the damage to the valve disc 202 can be effectively reduced, thereby improving the protection effect of the valve disc 202.

[0024] It should be noted that at the end of the rotation of the valve flap 202, that is, when the valve flap 202 is fully open, the gap between the valve flap 202 and the valve tube 101 is the largest, and the fluid pressure is the smallest. At this time, the reset component 6 will reset the filter box 301, and the closing plate 505 will close the discharge hole 303 under the action of the connecting rod 502 and the connecting spring 503. At this time, impurities entering the filter box 301 will accumulate, achieving a process repetition effect, which is convenient for providing protection to the valve flap 202 again when the valve flap 202 is closed.

[0025] like Figure 7-Figure 11As shown, the striking assembly 7 includes a vibration plate 701, the vibration plate 701 is fixed between the filter boxes 301, a plurality of striking blocks 702 are arranged on the vibration plate 701, a cross bar 704 is fixed between the filter boxes 301, a shielding plate 703 and a moving block 707 are sleeved on the cross bar 704, the shielding plate 703 is fixedly connected to the moving block 707, a pressing spring 708 is fixed on the moving block 707, the pressing spring 708 is sleeved on the cross bar 704, a plurality of striking springs 709 are fixed on the moving block 707, and a striking ball 709 is fixed on each of the striking springs 709. 10. The shielding plate 703 is connected to the vibration plate 701 through a sealing assembly. Water flows through the feed hole 304 into between the shielding plate 703 and the vibration plate 701. Under the action of the sealing assembly and the water pressure, the shielding plate 703 and the moving block 707 move on the cross bar 704. At this time, under the action of the striking spring 709, the striking ball 710 will continue to hit the striking block 702, thereby applying a vibration force to the vibration plate 701, promoting the normal discharge of the filtered material from the discharge hole 303. When the fluid pressure decreases, the extrusion spring 708 prompts the moving block 707 to reset.

[0026] It should be noted that when the valve flap 202 is opened, water will flow into between the baffle plate 703 and the vibration plate 701 through the two feed holes 304. At this time, under the action of the sealing component and the water flow pressure, the baffle plate 703 moves laterally and moves together with the moving block 707. At this time, under the action of the striking spring 709, the striking ball 710 will swing irregularly on the striking spring 709, so that it can continuously hit the striking block 702, and thus can exert a vibration force on the vibration plate 701. When impurities accumulate on the vibration plate 701, the vibration force will promote the normal discharge of the filtrate from the discharge hole 303, thereby achieving the effect of preventing blockage, and when the fluid pressure decreases, the extrusion spring 708 will cause the moving block 707 to move laterally and reset. During the resetting process, the striking ball 710 will still hit the vibration plate 701, thereby achieving a continuous knocking effect.

[0027] like Fig. 9 As shown, the sealing assembly includes a sealing plate 706 and a closing spring 705, the baffle plate 703 is an I-shaped structure, the closing spring 705 is respectively fixed on the top and the bottom of the baffle plate 703, the sealing plate 706 is fixed on the closing spring 705, and there is a sealing contact between the sealing plate 706 and the vibration plate 701. When the fluid enters between the baffle plate 703 and the vibration plate 701 through the feed hole 304, under the action of the sealing plate 706 and the vibration plate 701 in sealing contact, the fluid will push the baffle plate 703 to move laterally.

[0028] It should be noted that under the pressure of the closing spring 705, the sealing plate 706 will always maintain a sealed contact with the vibration plate 701. Therefore, when the fluid enters between the baffle plate 703 and the vibration plate 701 through the feed hole 304 so that the fluid pushes the baffle plate 703 to move laterally, the sealing plate 706 is always in a sealed contact with the vibration plate 701, thereby ensuring that the baffle plate 703 can move laterally stably.

[0029] like Figure 5 As shown, the impact assembly 4 includes an impact plate 401, and a plurality of short rods are fixed on the filter box 301. The impact plate 401 is fixed on the short rods. The impact plates 401 are all inclined and expanded outward. When the valve flap 202 rotates, the fluid impacts the impact plate 401, and the fluid pressure causes the filter box 301 to move laterally.

[0030] like Figure 6 As shown, the reset assembly 6 includes a reset block 601 and a reset spring 602. A reset groove is opened on the filter box 301. The reset spring 602 is fixed in the reset groove. The reset block 601 is fixed to the reset spring 602. The filter box 301 is fixed on the reset block 601. The reset block 601 and the reset groove are both in a step-shaped shape. When the impact assembly 4 is impacted by the fluid, the reset block 601 squeezes the reset spring 602, and the filter box 301 moves. When the impact assembly 4 is not impacted by the fluid, the reset spring 602 causes the reset block 601 to reset, and the filter box 301 is reset.

[0031] like Figure 6 As shown, a plurality of discharge grooves 603 and drainage grooves 604 are formed on the valve flap 202, and both the discharge grooves 603 and the drainage grooves 604 are communicated with the reset grooves. The filter box 301 is not in contact with the valve flap 202. When the valve flap 202 is fully opened, the impact assembly 4 is not impacted by the fluid, and the fluid flows through the gap between the valve flap 202 and the filter box 301, thereby reducing the impact of the fluid on the filter box 301 and facilitating the resetting of the reset block 601.

[0032] It should be noted that since the filter box 301 is not in contact with the valve flap 202, when the valve flap 202 is fully opened, the fluid impact force on the impact assembly 4 and the filter box 301 will be reduced, and the fluid will flow through the gap between the valve flap 202 and the filter box 301, thereby further reducing the impact force of the fluid on the filter box 301, so that the filter box 301 can be successfully reset under the action of the reset block 601 and the reset spring 602.

[0033] like Figure 6As shown, the valve disc 202 is rotatably connected to a plurality of sealing bearings, and the pull rod 501 is fixed on the sealing bearings. When the filter box 301 moves laterally, the pull rod 501 rotates under the action of the sealing bearings, and the closing plate 505 moves in close contact with the filter box 301 under the tension of the connecting spring 503, leaking out of the discharge hole 303.

[0034] like Figure 4 As shown, filter cotton 302 is provided on the filter box 301, and the filter cotton 302 covers part of the feed hole 304 therein. When the fluid enters between the baffle plate 703 and the vibration plate 701 through the feed hole 304, the filter cotton 302 filters impurities in the fluid to reduce the impurities between the baffle plate 703 and the vibration plate 701.

[0035] like Figure 1-Figure 2 As shown, a plurality of docking flanges 102 are fixed on the valve tube 101, a rotating ring 201 is provided on the valve tube 101, the rotating ring 201 is connected to the valve disc 202, a limiting rubber ring 103 is provided in the valve tube 101, the limiting rubber ring 103 is in contact with the valve disc 202, when the valve disc 202 is rotated, the limiting rubber ring 103 is used to limit the valve disc 202 to prevent the valve disc 202 from excessive rotation.

[0036] It should be noted that in the initial stage of the valve flap 202 opening, the high-pressure fluid will impact the impact plate 401, and the fluid pressure will cause the filter box 301 to move laterally. The reset block 601 squeezes the reset spring 602, so that the filter box 301 is close to the opening position of the valve flap 202 and the valve tube 101, and the closing plate 505 will be pulled open by the connecting rod 502. At this time, the impurities entering the filter box 301 through the feed hole 304 will flow out through the discharge hole 303. At the end of the rotation of the valve flap 202, that is, when the valve flap 202 is fully opened, the gap between the valve flap 202 and the valve tube 101 is the largest, and the fluid pressure is the smallest. Since the filter box 301 is not in contact with the valve flap 202, when the valve flap 202 is fully opened, the fluid will flow from the gap between the valve flap 202 and the filter box 301, and the closing plate 505 will be between the connecting rod 502 and the connecting spring 5 03, the discharge hole 303 is closed. At this time, the impurities entering the filter box 301 will accumulate. When the valve disc 202 is opened, the water flow will enter between the baffle plate 703 and the vibration plate 701 through the two feed holes 304. The filter cotton 302 filters the impurities in the fluid and reduces the impurities between the baffle plate 703 and the vibration plate 701. At this time, under the extrusion of the closing spring 705, the sealing plate 706 will always maintain a sealed contact with the vibration plate 701, the baffle plate 703 moves laterally, and moves together with the moving block 707. At this time, under the action of the striking spring 709, the striking ball 710 will swing irregularly on the striking spring 709, so that it can continuously strike the striking block 702. When the fluid pressure decreases, the extrusion spring 708 will cause the moving block 707 to move laterally and reset. During the resetting process, the striking ball 710 will still strike the vibration plate 701.

[0037] 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 limited by the attached embodiments and their equivalents.

Claims

1. A check valve, comprising a valve body assembly (1) and a control assembly (2), wherein the valve body assembly (1) comprises a valve tube (101), the control assembly (2) comprises a valve flap (202), a protective assembly (3) for transverse sliding is arranged on the valve flap (202), and the valve flap (202) is characterized in that: The protection component (3) is connected to the valve flap (202) via a reset component (6); an impact component (4) is provided on the protection component (3); a sealing component (5) for controlling the discharge of materials is provided on the protection component (3); and a vibrating striking component (7) is provided inside the protection component (3); The protection component (3) comprises a filter box (301), the filter box (301) is a semicircular hollow structure, and a plurality of feed holes (304) and discharge holes (303) are respectively opened on the filter box (301); the closing component (5) comprises a closing plate (505), the closing plate (505) is attached to the surface of the filter box (301), a connecting spring (503) is fixed between the closing plates (505), a pull rod (501) is rotatably connected to the valve flap (202), a connecting rod (502) is fixedly connected between the pull rod (501) and the closing plate (505), and a plurality of closing blocks (504) are fixed on the filter box (301); In the initial stage of the valve disc (202) rotating, the gap between the valve disc (202) and the valve tube (101) is small, and the fluid pressure is high. The impact assembly (4) drives the filter box (301) close to the valve tube (101) under the fluid pressure, and the closing plate (505) opens. Impurities that enter the filter box (301) through the feed hole (304) flow out through the discharge hole (303), and an impurity protection layer is formed between the valve disc (202) and the valve tube (101) to resist the impact of impurities mixed in the high-pressure fluid on the valve disc (202); At the end of the rotation of the valve disc (202), the gap between the valve disc (202) and the valve tube (101) is at its maximum, the fluid pressure is low, the reset assembly (6) resets the filter box (301), the sealing plate (505) closes the discharge hole (303), and the filter box (301) accumulates impurities, thereby achieving a repeated process.

2. A check valve according to claim 1, characterized in that: The striking assembly (7) comprises a vibration plate (701), the vibration plate (701) being fixed between the filter boxes (301), a plurality of striking blocks (702) being arranged on the vibration plate (701), a cross bar (704) being fixed between the filter boxes (301), a shielding plate (703) and a moving block (707) being sleeved on the cross bar (704), the shielding plate (703) being fixedly connected to the moving block (707), a pressing spring (708) being fixed on the moving block (707), the pressing spring (708) being sleeved on the cross bar (704), a plurality of striking springs (709) being fixed on the moving block (707), and a striking spring (709) being fixed on each of the striking springs (709). The ball (710) is hit, the shielding plate (703) and the vibration plate (701) are connected via a sealing assembly, and water flows through the feed hole (304) into the space between the shielding plate (703) and the vibration plate (701). Under the action of the sealing assembly and the water flow pressure, the shielding plate (703) and the moving block (707) move on the crossbar (704). At this time, under the action of the striking spring (709), the striking ball (710) will continue to strike the striking block (702), thereby applying a vibration force to the vibration plate (701), promoting the normal discharge of the filtered material from the discharge hole (303). When the fluid pressure decreases, the extrusion spring (708) causes the moving block (707) to reset.

3. A check valve according to claim 2, characterized in that: The sealing assembly comprises a sealing plate (706) and a closing spring (705); the baffle plate (703) is an I-shaped structure; the closing spring (705) is respectively fixed to the top and bottom of the baffle plate (703); the sealing plate (706) is fixed to the closing spring (705); the sealing plate (706) and the vibration plate (701) are in sealing contact; when a fluid enters between the baffle plate (703) and the vibration plate (701) through the feed hole (304), the fluid pushes the baffle plate (703) to move laterally under the action of the sealing plate (706) and the vibration plate (701) in sealing contact.

4. A check valve according to claim 1, characterized in that: The impact assembly (4) comprises an impact plate (401). A plurality of short rods are fixed on the filter box (301). The impact plate (401) is fixed on the short rods. The impact plates (401) are all in an outwardly expanding and inclined shape. When the valve flap (202) rotates, the fluid impacts the impact plate (401), and the fluid pressure causes the filter box (301) to move laterally.

5. A check valve according to claim 1, characterized in that: The reset assembly (6) comprises a reset block (601) and a reset spring (602); a reset groove is formed on the filter box (301); the reset spring (602) is fixed in the reset groove; the reset block (601) and the reset spring (602) are fixed; the filter box (301) is fixed on the reset block (601); the reset block (601) and the reset groove are both in a step-shaped manner; when the impact assembly (4) is impacted by a fluid, the reset block (601) squeezes the reset spring (602) and the filter box (301) moves; when the impact assembly (4) is not impacted by a fluid, the reset spring (602) causes the reset block (601) to reset and the filter box (301) to reset.

6. A check valve according to claim 5, characterized in that: The valve flap (202) is provided with a plurality of discharge grooves (603) and drainage grooves (604), and the discharge grooves (603) and drainage grooves (604) are both in communication with the reset grooves. The filter box (301) and the valve flap (202) are not in contact. When the valve flap (202) is fully opened, the impact assembly (4) is not impacted by the fluid, and the fluid flows through the gap between the valve flap (202) and the filter box (301), thereby reducing the impact of the fluid on the filter box (301) and facilitating the resetting of the reset block (601).

7. A check valve according to claim 1, characterized in that: The valve flap (202) is rotatably connected to a plurality of sealing bearings, and the pull rod (501) is fixed on the sealing bearings. When the filter box (301) moves laterally, the pull rod (501) rotates under the action of the sealing bearings, and the closing plate (505) moves in close contact with the filter box (301) under the pulling force of the connecting spring (503), leaking out of the discharge hole (303).

8. A check valve according to claim 1, characterized in that: The filter box (301) is provided with filter cotton (302), which covers part of the feed hole (304) therein. When the fluid enters between the baffle plate (703) and the vibration plate (701) through the feed hole (304), the filter cotton (302) filters impurities in the fluid, thereby reducing the impurities between the baffle plate (703) and the vibration plate (701).

9. A check valve according to claim 1, characterized in that: A plurality of docking flanges (102) are fixed to the valve tube (101), a rotating ring (201) is provided on the valve tube (101), the rotating ring (201) is connected to the valve disc (202), a limiting rubber ring (103) is provided in the valve tube (101), and the limiting rubber ring (103) is in contact with the valve disc (202).

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