Check valve structure with cleaning mechanism

Abstract

This invention relates to the field of valve technology, specifically to a check valve structure with a cleaning mechanism, comprising a valve body, a flow port, a valve seat, a through hole, a sealing valve disc, a guide member, a compression spring, and a fixed seat mounted on the valve body within the flow port; cleaning plates hinged to each fixed seat; and reset limiting mechanisms respectively disposed between each cleaning plate and the fixed seat. Through the cooperation of the fluid medium's conveying force and the compression spring, the sealing valve disc in the check valve cleans impurities from its surroundings during its reciprocating rise and fall, reducing the adhesion of impurities such as mud, rust, welding slag, oil, and calcium and magnesium deposits. This cleaning of impurities facilitates a tight fit between the periphery of the sealing valve disc and the through hole, reducing the occurrence of impurities being brought into the sealing surface and causing check valve sealing failure, further improving the sealing effect of the double check valve structure.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically to a check valve structure with a cleaning mechanism. Background Technology

[0002] A check valve is a valve device that allows unidirectional flow of media and prevents backflow. It is widely used in fluid transport systems such as water supply and drainage, sewage treatment, fire protection, and chemical industries. To overcome the technical problem of insufficient sealing reliability in traditional single-disc check valves, double check valve solutions have been proposed in existing technologies. For example, patent CN202511847605.9 discloses a double check valve that adopts a double-disc structure with a sealing disc and a secondary disc connected in series. The linkage shaft enables the coordinated lifting and lowering of the two discs, forming a double seal at the flow port, significantly improving the sealing reliability and backflow prevention performance of the check valve. The sealing disc of this double check valve is typically made of rubber-coated material to form a flexible surface contact seal during the compression fit with the valve seat through-hole, thereby achieving a good sealing effect.

[0003] However, the applicant found that in actual working conditions, the fluid medium often contains impurities such as mud, rust, welding slag, oil, and calcium and magnesium precipitates. Due to the adhesive properties of the rubber-coated valve disc, impurities tend to adhere to the circumference of the valve disc and be carried into the sealing surface during the valve disc's raising and lowering process. The adhered impurities can easily create gaps when the valve disc is squeezed against the through hole, thus failing to form a tight fit. Even with a two-stage valve disc, the loss of valve disc sealing effect can be accelerated, ultimately leading to check valve sealing failure and making it difficult to further improve the sealing effect of the double check valve structure. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of the prior art by providing a check valve structure with a cleaning mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a check valve structure with a cleaning mechanism, comprising a valve body, a flow port on the valve body for supplying medium flow, a valve seat disposed on the valve body within the flow port, a through hole disposed on the valve seat and communicating with the flow port, a sealing valve disc disposed on the valve body within the flow port for closing the through hole after lowering and opening the through hole after rising, a guide member disposed between the valve seat and the sealing valve disc for guiding the lifting direction of the sealing valve disc, and a guide member disposed between the guide member and the sealing valve disc. The compression spring also includes several fixed seats arranged in a ring at equal intervals on the valve body, located inside the flow port and above the through hole, the fixed seats being fixedly mounted on the valve body; several cleaning plates respectively hinged to each of the fixed seats, used to be pushed upwards and flipped by the sealing valve disc when it rises; and reset limiting mechanisms respectively disposed between each of the cleaning plates and the fixed seats, used to drive the cleaning plates to flip downwards and reset after the sealing valve disc rises past the cleaning plates, and to limit the cleaning plates from continuing to flip downwards after resetting, so that the sealing valve disc is squeezed against the cleaning plates when it descends, thus cleaning the attached impurities.

[0006] A further improvement is that the cleaning plate has a connection opening and two hinge holes that are connected to the connection opening. The fixing base is provided with two hinge rods for hinged engagement with the hinge holes, and the reset limiting mechanism is located between the hinge rods and the hinge holes.

[0007] A further improvement is made to the following: the reset limiting mechanism includes a limiting protrusion fixedly disposed on the hinge rod within the hinge hole; an arc-shaped slide is disposed on the cleaning plate within the hinge hole, the arc-shaped slide and the limiting protrusion are in clearance fit, and the arc-shaped slide is connected to the hinge hole; a reset device is disposed between the limiting protrusion and the cleaning plate within the arc-shaped slide, which is used to generate elastic potential energy when the cleaning plate is pushed upward by the rising sealing valve disc and flips upward, and to drive the cleaning plate to flip downward and reset after the sealing valve disc rises past the cleaning plate.

[0008] A further improvement is that the reset device includes a reset arc spring disposed between the limiting protrusion and the cleaning plate within an arc-shaped slide.

[0009] A further improvement is that: an arc-shaped guide rod is provided on the cleaning plate within the arc-shaped slide, the reset arc-shaped spring is sleeved on the arc-shaped guide rod, and the limiting protrusion has a guide hole for the arc-shaped guide rod to pass through the limiting protrusion when the cleaning plate is flipped up or down. The two ends of the reset arc-shaped spring are respectively abutted between the limiting protrusion and the cleaning plate within the arc-shaped slide.

[0010] Further effects: The arc-shaped guide rod and guide hole prevent the reset arc spring from bending when compressing or releasing elastic potential energy. The cooperation between the arc-shaped guide rod and the guide hole restricts the reset arc spring, allowing it to deform only along the arc of the arc-shaped guide rod, thus ensuring stability during reset and compression.

[0011] Further benefits include: The return spring, mounted on the arc-shaped guide rod in a sleeved manner, not only serves as a guide and limiter after assembly, but also facilitates assembly and disassembly. During assembly, simply slip the return arc-shaped spring onto the arc-shaped guide rod, align the limiting protrusion with the position of the arc-shaped slide, insert the hinge rod into the hinge hole, and place the return arc-shaped spring against the limiting protrusion and the cleaning plate. When disassembly, maintenance, or replacement is required, it is also easy to pull outward to disengage the hinge rod from the hinge hole.

[0012] A further improvement is that the cleaning plate is provided with an elastic contact plate, which is used to elastically squeeze the periphery of the sealing valve disc when the sealing valve disc descends, so as to reduce the damage to the sealing valve disc caused by hard friction and reduce the driving force required for the sealing valve disc to descend.

[0013] Further effects: By setting up the elastic contact plate, not only can the sealing valve disc make elastic compression contact with the elastic contact plate during descent, but the elastic contact plate can also maintain compression contact with the periphery of the sealing valve disc during deformation. Furthermore, as the degree of deformation increases, the compression force between the elastic contact plate and the periphery of the sealing valve disc will also increase.

[0014] A further improvement is that the bottom of the cleaning plate is provided with a flow-guiding protrusion, which is used to guide the fluid medium to flow out towards the connection opening when the fluid medium flows upward, so as to reduce the upward pushing force of the fluid medium on the cleaning plate; the bottom of the cleaning plate is provided with a flow-guiding ramp, and both the flow-guiding ramp and the flow-guiding protrusion are connected to the connection opening, which is used to further guide the fluid medium to flow towards the connection opening after the fluid medium comes into contact with the flow-guiding protrusion.

[0015] Further effects: By setting the guide protrusions and guide ramps, the fluid medium can be guided to flow out from the connection opening when it flows from bottom to top, reducing the upward driving force of the flowing medium on the cleaning plate. This reduces the resistance of the cleaning plate during the downward flipping process when the cleaning plate is driven to reset by the reset arc spring, preventing the fluid medium from impacting the lower surface of the cleaning plate and affecting the reset effect of the cleaning plate.

[0016] A further improvement is that the cleaning plate is provided with an elastic contact plate, which is used to elastically squeeze the periphery of the sealing valve disc when the sealing valve disc descends, so as to reduce the damage to the sealing valve disc caused by hard friction and reduce the driving force required for the sealing valve disc to descend. The guide protrusion and guide slope are provided on the elastic contact plate, and the connection opening is opened on the cleaning plate.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are as follows: During the upward movement of the sealing valve disc by the fluid medium, the circumference of the sealing valve disc pushes the cleaning plate upward, causing each cleaning plate to rotate upward around the fixed seat, thereby reducing the resistance generated when the sealing valve disc opens. After the sealing valve disc rises past the cleaning plate, the reset and limiting mechanism drives the cleaning plate to rotate downward and reset, and also forms a limiting state for the reset cleaning plate. An inner ring is formed between the reset and limited cleaning plates, the diameter of which is smaller than the circumference diameter of the sealing valve disc, so that the inner ring formed between several cleaning plates can contact the circumference of the descending sealing valve disc. This prevents the sealing valve disc from losing its cleaning state due to individual or individual cleaning plates being in an upward rotating state, and also prevents… To prevent the cleaning plate from excessively tilting downwards and reducing the cleaning effect, when the fluid medium's conveying force decreases, the compression spring releases its elastic potential energy to push the sealing valve disc downwards. The periphery of the sealing valve disc squeezes against the periphery of the cleaning plate, thereby scraping away and cleaning the impurities attached to the periphery of the sealing valve disc. Through the cooperation of the fluid medium's conveying force and the compression spring, the sealing valve disc in the check valve can clean the impurities on its periphery during the reciprocating lifting and lowering process, reducing the adhesion of impurities such as mud, rust, welding slag, oil stains, and calcium and magnesium deposits. The cleaning of impurities helps to form a tight fit between the periphery of the sealing valve disc and the through hole, reducing the phenomenon of impurities being brought into the sealing surface and causing the check valve to fail to seal, and further improving the sealing effect of the double check valve structure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a cross-sectional view of the cleaning plate and the connecting opening in this invention; Figure 3 This is a schematic diagram of the structure of the fixing base in this invention; Figure 4 It corresponds Figure 2 Another state diagram; Figure 5 This is a cross-sectional view of the fixing base and the cleaning plate in this invention; Figure 6 This is a bottom perspective view of the fixing base and cleaning plate in this invention; Figure 7 This is a top perspective view of the cleaning plate in this invention; Figure 8 This is a top perspective view of the fixing base and cleaning plate in this invention; Figure 9 This is a top view of the annular array of valve seats and cleaning plates in this invention; Figure 10 This is a schematic diagram of the cleaning plate flipping downwards and resetting in this invention; Figure 11 This is a schematic diagram of the cleaning plate flipping upwards in this invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Flow port; 3. Valve seat; 4. Through hole; 5. Sealing valve disc; 6. Guide component; 7. Compression spring; 8. Fixed seat; 9. Cleaning plate; 10. Connection opening; 11. Hinge hole; 12. Hinge rod; 13. Restricting protrusion; 14. Arc-shaped slide; 15. Return arc-shaped spring; 16. Arc-shaped guide rod; 17. Guide through hole; 18. Elastic contact plate; 19. Guide protrusion; 20. Guide ramp. Detailed Implementation

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. Example 1

[0022] See Figures 1 to 11 As shown, the technical solution adopted in this specific embodiment is: A check valve structure with a cleaning mechanism includes a valve body 1, a flow port 2 opened on the valve body 1 for medium flow, a valve seat 3 disposed on the valve body 1 and located in the flow port 2, a through hole 4 opened on the valve seat 3 and connected to the flow port 2, a sealing valve disc 5 disposed on the valve body 1 and located in the flow port 2 for closing the through hole 4 after descending and opening the through hole 4 after rising, a guide member 6 disposed between the valve seat 3 and the sealing valve disc 5 for guiding the rising and falling direction of the sealing valve disc 5, a compression spring 7 disposed between the guide member 6 and the sealing valve disc 5, and also includes a plurality of fixed seats 8 disposed annularly and equidistantly on the valve body 1, located in the flow port 2 and above the through hole 4, the fixed seats 8 being fixedly disposed on the valve body 1; Several cleaning plates 9 are respectively hinged on each fixed seat 8, and are used to flip upward by the push of the sealing valve disc 5 when the sealing valve disc 5 rises; The reset limiting mechanism is respectively set between each cleaning plate 9 and the fixed seat 8. It is used to drive the cleaning plate 9 to flip down and reset after the sealing valve disc 5 rises and passes the cleaning plate 9, and to restrict the cleaning plate 9 from continuing to flip down after resetting, so that the sealing valve disc 5 is squeezed against the cleaning plate 9 when it descends, and the attached impurities are cleaned.

[0023] The cleaning plate 9 has a connection opening 10 and two hinge holes 11. The two hinge holes 11 are connected to the connection opening 10. The fixing base 8 is provided with two hinge rods 12 for hinged engagement with the hinge holes 11. The reset limiting mechanism is provided between the hinge rods 12 and the hinge holes 11.

[0024] The hinge rod 12 and the hinge hole 11 are fitted with a clearance to form a hinge fit.

[0025] The reset limiting mechanism includes a limiting protrusion 13 fixedly disposed on the hinge rod 12 and located in the hinge hole 11; An arc-shaped slide 14 is provided on the cleaning plate 9 inside the hinge hole 11. The arc-shaped slide 14 is in clearance fit with the limiting protrusion 13, and the arc-shaped slide 14 is connected to the hinge hole 11. A reset device is provided between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14. This device generates elastic potential energy when the cleaning plate 9 is pushed upward by the rising sealing valve disc 5, and drives the cleaning plate 9 to flip downward and reset after the sealing valve disc 5 rises past the cleaning plate 9. Figure 2 As shown, when the cleaning plate 9 is in the reset state, the limiting protrusion 13 is affected by the top of the arc-shaped slide 14, limiting the protrusion 13 from abutting against the inner wall of the cleaning plate 9, thereby limiting the cleaning plate 9 from continuing to flip downward; as Figure 3 As shown, when the cleaning plate 9 is flipped upwards, the limiting protrusion 13 is located in the middle or below the arc-shaped slide 14, which does not affect the upward flipping of the cleaning plate 9. The center of the arc-shaped slide 14 is the same as the center of the hinge hole 11, and the arc-shaped slide 14 and the limiting protrusion 13 are in clearance fit.

[0026] The reset device includes a reset arc spring 15 disposed between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14. The reset arc spring 15 is a compression spring.

[0027] An arc-shaped guide rod 16 is provided on the cleaning plate 9 within the arc-shaped slide 14. A reset arc-shaped spring 15 is sleeved on the arc-shaped guide rod 16. A guide hole 17 is provided on the limiting protrusion 13 for the arc-shaped guide rod 16 to pass through when the cleaning plate 9 is flipped up or down. The two ends of the reset arc-shaped spring 15 are respectively abutted between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14.

[0028] The guide hole 17 is an arc-shaped hole, and the center positions of the guide hole 17 and the arc-shaped guide rod 16 are the same as the center positions of the hinge rod 12 and the hinge hole 11, respectively.

[0029] By setting the arc-shaped guide rod 16 and the guide hole 17, the return arc spring 15 can be prevented from bending when compressing or releasing elastic potential energy. The cooperation between the arc-shaped guide rod 16 and the guide hole 17 restricts the return arc spring 15, so that it can only deform along the arc of the arc-shaped guide rod 16, thereby ensuring stability during reset and compression.

[0030] Furthermore, the reset spring is mounted on the arc-shaped guide rod 16 in a sleeved manner. This not only serves as a guide and limiter after assembly, but also facilitates assembly and disassembly. During assembly, simply put the reset arc-shaped spring 15 onto the arc-shaped guide rod 16, align the limiting protrusion 13 with the position of the arc-shaped slide rail 14, and insert the hinge rod 12 into the hinge hole 11 so that the reset arc-shaped spring 15 abuts against the limiting protrusion 13 and the cleaning plate 9. When disassembly, maintenance, or replacement is required, it is also easy to pull outward to disengage the hinge rod 12 from the hinge hole 11.

[0031] A resilient contact plate 18 is provided on the cleaning plate 9. This plate elastically presses against the periphery of the sealing valve disc 5 as it descends, reducing damage to the sealing valve disc 5 from hard friction and decreasing the driving force required for its descent. The resilient contact plate 18 is made of rubber or silicone. It is installed at one end of the cleaning plate 9 by bonding or injection molding. The resilient contact plate 18 is as follows... Figure 7 As shown.

[0032] Furthermore, to increase the contact friction between the descending sealing valve disc 5 and the elastic contact plate 18, several friction protrusions can be provided on the elastic contact plate 18. The friction protrusions can be conical, rectangular, square, or arc-shaped, and are integrally formed with the elastic contact plate 18. By providing friction protrusions on the elastic contact plate 18, when the elastic contact plate 18 is elastically deformed by the descending sealing valve disc 5, the friction force between the elastic contact plate 18 and the sealing valve disc 5 gradually increases with the degree of deformation of the elastic contact plate 18.

[0033] The working principle of this invention is as follows: When the fluid medium pushes the sealing valve disc 5 upward, the circumference of the sealing valve disc 5 pushes the cleaning plate 9 upward, causing each cleaning plate 9 to flip upward around the fixed seat 8. The return arc spring 15 is compressed to generate elastic potential energy. After the sealing valve disc 5 rises past the cleaning plate 9, the return arc spring 15 releases the elastic potential energy, driving the cleaning plate 9 to flip downward and reset. Furthermore, the setting of the limiting protrusion 13 and the arc slide 14 can also restrict the cleaning plate 9 after reset. An inner ring is formed between each cleaning plate 9 after reset and restriction. The diameter of this inner ring is smaller than the circumference diameter of the sealing valve disc 5, so that the inner ring formed between several cleaning plates 9 can contact the circumference of the descending sealing valve disc 5, preventing the loss of cleaning of the sealing valve disc 5 due to individual or each cleaning plate 9 being in an upward flipped state. While maintaining a clean state, it also prevents the cleaning plate 9 from excessively tilting downwards, which would reduce the cleaning effect. When the conveying force of the fluid medium decreases, the compression spring 7 releases its elastic potential energy to push the sealing valve disc 5 down. The periphery of the sealing valve disc 5 is squeezed against the periphery of the cleaning plate 9, thereby scraping and cleaning the impurities attached to the periphery of the sealing valve disc 5. Through the cooperation of the conveying force of the fluid medium and the compression spring 7, the sealing valve disc 5 in the check valve can clean the impurities on the periphery during the reciprocating lifting and lowering process, reducing the adhesion of impurities such as mud, rust, welding slag, oil stains and calcium and magnesium precipitates. The cleaning of impurities helps to form a tight fit between the periphery of the sealing valve disc 5 and the through hole 4, reducing the phenomenon of impurities being brought into the sealing surface and causing the check valve to fail to seal, and further improving the sealing effect of the double check valve structure.

[0034] By setting the elastic contact plate 18, not only can the sealing valve disc 5 descend and elastically press against the elastic contact plate 18, but the elastic contact plate 18 can also maintain pressing contact with the sealing valve disc 5 around the periphery during the deformation process. Furthermore, as the degree of deformation increases, the pressing force between the elastic contact plate 18 and the periphery of the sealing valve disc 5 will also increase. Example 2

[0035] See Figures 1 to 11 As shown, the technical solution adopted in this specific embodiment is: A check valve structure with a cleaning mechanism includes a valve body 1, a flow port 2 opened on the valve body 1 for medium flow, a valve seat 3 disposed on the valve body 1 and located in the flow port 2, a through hole 4 opened on the valve seat 3 and connected to the flow port 2, a sealing valve disc 5 disposed on the valve body 1 and located in the flow port 2 for closing the through hole 4 after descending and opening the through hole 4 after rising, a guide member 6 disposed between the valve seat 3 and the sealing valve disc 5 for guiding the rising and falling direction of the sealing valve disc 5, a compression spring 7 disposed between the guide member 6 and the sealing valve disc 5, and also includes a plurality of fixed seats 8 disposed annularly and equidistantly on the valve body 1, located in the flow port 2 and above the through hole 4, the fixed seats 8 being fixedly disposed on the valve body 1; Several cleaning plates 9 are respectively hinged on each fixed seat 8, and are used to flip upward by the push of the sealing valve disc 5 when the sealing valve disc 5 rises; A reset limiting mechanism is respectively set between each cleaning plate 9 and the fixed base 8. This mechanism drives the cleaning plate 9 to flip downwards and reset after the sealing valve disc 5 rises past it. After resetting, it restricts the cleaning plate 9 from continuing to flip downwards, so that the sealing valve disc 5 is squeezed against the cleaning plate 9 when it descends, thus cleaning the attached impurities. The cleaning plate 9 can be made entirely of rubber or silicone.

[0036] The cleaning plate 9 has a connection opening 10 and two hinge holes 11. The two hinge holes 11 are connected to the connection opening 10. The fixing base 8 is provided with two hinge rods 12 for hinged engagement with the hinge holes 11. The reset limiting mechanism is provided between the hinge rods 12 and the hinge holes 11.

[0037] The hinge rod 12 and the hinge hole 11 are fitted with a clearance to form a hinge fit.

[0038] The reset limiting mechanism includes a limiting protrusion 13 fixedly disposed on the hinge rod 12 and located in the hinge hole 11; An arc-shaped slide 14 is provided on the cleaning plate 9 inside the hinge hole 11. The arc-shaped slide 14 is in clearance fit with the limiting protrusion 13, and the arc-shaped slide 14 is connected to the hinge hole 11. A reset device is provided between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14. This device generates elastic potential energy when the cleaning plate 9 is pushed upward by the rising sealing valve disc 5, and drives the cleaning plate 9 to flip downward and reset after the sealing valve disc 5 rises past the cleaning plate 9. Figure 2 As shown, when the cleaning plate 9 is in the reset state, the limiting protrusion 13 is affected by the top of the arc-shaped slide 14, limiting the protrusion 13 from abutting against the inner wall of the cleaning plate 9, thereby limiting the cleaning plate 9 from continuing to flip downward; as Figure 3As shown, when the cleaning plate 9 is flipped upwards, the limiting protrusion 13 is located in the middle or below the arc-shaped slide 14, which does not affect the upward flipping of the cleaning plate 9. The center of the arc-shaped slide 14 is the same as the center of the hinge hole 11, and the arc-shaped slide 14 and the limiting protrusion 13 are in clearance fit.

[0039] The reset device includes a reset arc spring 15 disposed between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14. The reset arc spring 15 is a compression spring.

[0040] An arc-shaped guide rod 16 is provided on the cleaning plate 9 within the arc-shaped slide 14. A reset arc-shaped spring 15 is sleeved on the arc-shaped guide rod 16. A guide hole 17 is provided on the limiting protrusion 13 for the arc-shaped guide rod 16 to pass through when the cleaning plate 9 is flipped up or down. The two ends of the reset arc-shaped spring 15 are respectively abutted between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14.

[0041] The guide hole 17 is an arc-shaped hole, and the center positions of the guide hole 17 and the arc-shaped guide rod 16 are the same as the center positions of the hinge rod 12 and the hinge hole 11, respectively.

[0042] By setting the arc-shaped guide rod 16 and the guide hole 17, the return arc spring 15 can be prevented from bending when compressing or releasing elastic potential energy. The cooperation between the arc-shaped guide rod 16 and the guide hole 17 restricts the return arc spring 15, so that it can only deform along the arc of the arc-shaped guide rod 16, thereby ensuring stability during reset and compression.

[0043] Furthermore, the reset spring is mounted on the arc-shaped guide rod 16 in a sleeved manner. This not only serves as a guide and limiter after assembly, but also facilitates assembly and disassembly. During assembly, simply put the reset arc-shaped spring 15 onto the arc-shaped guide rod 16, align the limiting protrusion 13 with the position of the arc-shaped slide rail 14, and insert the hinge rod 12 into the hinge hole 11 so that the reset arc-shaped spring 15 abuts against the limiting protrusion 13 and the cleaning plate 9. When disassembly, maintenance, or replacement is required, it is also easy to pull outward to disengage the hinge rod 12 from the hinge hole 11.

[0044] The bottom of the cleaning plate 9 is provided with a guide protrusion 19, which is used to guide the fluid medium to flow out of the connection opening 10 when the fluid medium flows upward, so as to reduce the upward pushing force of the fluid medium on the cleaning plate 9; The bottom of the cleaning plate 9 is provided with a flow guide slope 20. Both the flow guide slope 20 and the flow guide protrusion 19 are connected to the connection opening 10. After the fluid medium comes into contact with the flow guide protrusion 19, it is used to further guide the fluid medium to flow to the connection opening 10.

[0045] Furthermore, in order to increase the contact friction between the descending sealing valve disc 5 and the cleaning plate 9, several friction protrusions can be provided on the elastic contact plate 18. The friction protrusions can be conical, rectangular, square, or arc-shaped, and are integrally formed with the cleaning plate 9.

[0046] The working principle of this embodiment is as follows: When the fluid medium pushes the sealing valve disc 5 upward, the periphery of the sealing valve disc 5 pushes the cleaning plate 9 upward, causing each cleaning plate 9 to flip upward around the fixed seat 8. The return arc spring 15 is compressed to generate elastic potential energy. After the sealing valve disc 5 rises past the cleaning plate 9, the return arc spring 15 releases the elastic potential energy, driving the cleaning plate 9 to flip downward and reset. The setting of the limiting protrusion 13 and the arc slide 14 can also form a limiting state for the reset cleaning plate 9. An inner ring is formed between each cleaning plate 9 after reset and limitation. The diameter of the inner ring is smaller than the periphery diameter of the sealing valve disc 5, so that the inner ring formed between several cleaning plates 9 can contact the periphery of the descending sealing valve disc 5, preventing the loss of cleaning of the sealing valve disc 5 due to individual or each cleaning plate 9 being in an upward flipped state. While maintaining a clean state, it also prevents the cleaning plate 9 from excessively tilting downwards, which would reduce the cleaning effect. When the conveying force of the fluid medium decreases, the compression spring 7 releases its elastic potential energy to push the sealing valve disc 5 down. The periphery of the sealing valve disc 5 is squeezed against the periphery of the cleaning plate 9, thereby scraping and cleaning the impurities attached to the periphery of the sealing valve disc 5. Through the cooperation of the conveying force of the fluid medium and the compression spring 7, the sealing valve disc 5 in the check valve can clean the impurities on the periphery during the reciprocating lifting and lowering process, reducing the adhesion of impurities such as mud, rust, welding slag, oil stains and calcium and magnesium precipitates. The cleaning of impurities helps to form a tight fit between the periphery of the sealing valve disc 5 and the through hole 4, reducing the phenomenon of impurities being brought into the sealing surface and causing the check valve to fail to seal, and further improving the sealing effect of the double check valve structure.

[0047] By setting the guide protrusion 19 and the guide ramp 20, the fluid medium can be guided to flow out from the connection opening 10 when it flows from bottom to top, reducing the upward driving force of the flowing medium on the cleaning plate 9. This reduces the resistance of the cleaning plate 9 during the downward flipping process when the cleaning plate 9 is driven to reset by the reset arc spring 15, and prevents the fluid medium from impacting the lower surface of the cleaning plate 9 and affecting the reset effect of the cleaning plate 9. Example 3

[0048] See Figures 1 to 11 As shown, the technical solution adopted in this specific embodiment is: A check valve structure with a cleaning mechanism includes a valve body 1, a flow port 2 opened on the valve body 1 for medium flow, a valve seat 3 disposed on the valve body 1 and located in the flow port 2, a through hole 4 opened on the valve seat 3 and connected to the flow port 2, a sealing valve disc 5 disposed on the valve body 1 and located in the flow port 2 for closing the through hole 4 after descending and opening the through hole 4 after rising, a guide member 6 disposed between the valve seat 3 and the sealing valve disc 5 for guiding the rising and falling direction of the sealing valve disc 5, a compression spring 7 disposed between the guide member 6 and the sealing valve disc 5, and also includes a plurality of fixed seats 8 disposed annularly and equidistantly on the valve body 1, located in the flow port 2 and above the through hole 4, the fixed seats 8 being fixedly disposed on the valve body 1; Several cleaning plates 9 are respectively hinged on each fixed seat 8, and are used to flip upward by the push of the sealing valve disc 5 when the sealing valve disc 5 rises; The reset limiting mechanism is respectively set between each cleaning plate 9 and the fixed seat 8. It is used to drive the cleaning plate 9 to flip down and reset after the sealing valve disc 5 rises and passes the cleaning plate 9, and to restrict the cleaning plate 9 from continuing to flip down after resetting, so that the sealing valve disc 5 is squeezed against the cleaning plate 9 when it descends, and the attached impurities are cleaned.

[0049] The cleaning plate 9 has a connection opening 10 and two hinge holes 11. The two hinge holes 11 are connected to the connection opening 10. The fixing base 8 is provided with two hinge rods 12 for hinged engagement with the hinge holes 11. The reset limiting mechanism is provided between the hinge rods 12 and the hinge holes 11.

[0050] The hinge rod 12 and the hinge hole 11 are fitted with a clearance to form a hinge fit.

[0051] The reset limiting mechanism includes a limiting protrusion 13 fixedly disposed on the hinge rod 12 and located in the hinge hole 11; An arc-shaped slide 14 is provided on the cleaning plate 9 inside the hinge hole 11. The arc-shaped slide 14 is in clearance fit with the limiting protrusion 13, and the arc-shaped slide 14 is connected to the hinge hole 11. A reset device is provided between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14. This device generates elastic potential energy when the cleaning plate 9 is pushed upward by the rising sealing valve disc 5, and drives the cleaning plate 9 to flip downward and reset after the sealing valve disc 5 rises past the cleaning plate 9. Figure 2 As shown, when the cleaning plate 9 is in the reset state, the limiting protrusion 13 is affected by the top of the arc-shaped slide 14, limiting the protrusion 13 from abutting against the inner wall of the cleaning plate 9, thereby limiting the cleaning plate 9 from continuing to flip downward; as Figure 3As shown, when the cleaning plate 9 is flipped upwards, the limiting protrusion 13 is located in the middle or below the arc-shaped slide 14, which does not affect the upward flipping of the cleaning plate 9. The center of the arc-shaped slide 14 is the same as the center of the hinge hole 11, and the arc-shaped slide 14 and the limiting protrusion 13 are in clearance fit.

[0052] The reset device includes a reset arc spring 15 disposed between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14. The reset arc spring 15 is a compression spring.

[0053] An arc-shaped guide rod 16 is provided on the cleaning plate 9 within the arc-shaped slide 14. A reset arc-shaped spring 15 is sleeved on the arc-shaped guide rod 16. A guide hole 17 is provided on the limiting protrusion 13 for the arc-shaped guide rod 16 to pass through when the cleaning plate 9 is flipped up or down. The two ends of the reset arc-shaped spring 15 are respectively abutted between the limiting protrusion 13 and the cleaning plate 9 within the arc-shaped slide 14.

[0054] The bottom of the cleaning plate 9 is provided with a guide protrusion 19, which is used to guide the fluid medium to flow out of the connection opening 10 when the fluid medium flows upward, so as to reduce the upward pushing force of the fluid medium on the cleaning plate 9; The bottom of the cleaning plate 9 is provided with a flow guide slope 20. Both the flow guide slope 20 and the flow guide protrusion 19 are connected to the connection opening 10. After the fluid medium comes into contact with the flow guide protrusion 19, it is used to further guide the fluid medium to flow to the connection opening 10.

[0055] The cleaning plate 9 is provided with an elastic contact plate 18, which is used to elastically squeeze the sealing valve disc 5 with the periphery of the sealing valve disc 5 when the sealing valve disc 5 descends, so as to reduce the damage to the sealing valve disc 5 caused by hard friction and reduce the driving force required for the sealing valve disc 5 to descend. The guide protrusion 19 and the guide slope 20 are provided on the elastic contact plate 18, and the connection opening 10 is opened on the cleaning plate 9.

[0056] Furthermore, to increase the contact friction between the descending sealing valve disc 5 and the elastic contact plate 18, several friction protrusions can be provided on the elastic contact plate 18. The friction protrusions can be conical, rectangular, square, or arc-shaped, and are integrally formed with the elastic contact plate 18. By providing friction protrusions on the elastic contact plate 18, when the elastic contact plate 18 is elastically deformed by the descending sealing valve disc 5, the friction force between the elastic contact plate 18 and the sealing valve disc 5 gradually increases with the degree of deformation of the elastic contact plate 18.

[0057] The working principle of this invention is as follows: When the fluid medium pushes the sealing valve disc 5 upward, the circumference of the sealing valve disc 5 pushes the cleaning plate 9 upward, causing each cleaning plate 9 to flip upward around the fixed seat 8. The return arc spring 15 is compressed to generate elastic potential energy. After the sealing valve disc 5 rises past the cleaning plate 9, the return arc spring 15 releases the elastic potential energy, driving the cleaning plate 9 to flip downward and reset. Furthermore, the setting of the limiting protrusion 13 and the arc slide 14 can also restrict the cleaning plate 9 after reset. An inner ring is formed between each cleaning plate 9 after reset and restriction. The diameter of this inner ring is smaller than the circumference diameter of the sealing valve disc 5, so that the inner ring formed between several cleaning plates 9 can contact the circumference of the descending sealing valve disc 5, preventing the loss of cleaning of the sealing valve disc 5 due to individual or each cleaning plate 9 being in an upward flipped state. While maintaining a clean state, it also prevents the cleaning plate 9 from excessively tilting downwards, which would reduce the cleaning effect. When the conveying force of the fluid medium decreases, the compression spring 7 releases its elastic potential energy to push the sealing valve disc 5 down. The periphery of the sealing valve disc 5 is squeezed against the periphery of the cleaning plate 9, thereby scraping and cleaning the impurities attached to the periphery of the sealing valve disc 5. Through the cooperation of the conveying force of the fluid medium and the compression spring 7, the sealing valve disc 5 in the check valve can clean the impurities on the periphery during the reciprocating lifting and lowering process, reducing the adhesion of impurities such as mud, rust, welding slag, oil stains and calcium and magnesium precipitates. The cleaning of impurities helps to form a tight fit between the periphery of the sealing valve disc 5 and the through hole 4, reducing the phenomenon of impurities being brought into the sealing surface and causing the check valve to fail to seal, and further improving the sealing effect of the double check valve structure.

[0058] By setting the elastic contact plate 18, not only can the sealing valve disc 5 descend and elastically press against the elastic contact plate 18, but the elastic contact plate 18 can also maintain pressing contact with the sealing valve disc 5 around the periphery during the deformation process. Furthermore, as the degree of deformation increases, the pressing force between the elastic contact plate 18 and the periphery of the sealing valve disc 5 will also increase.

[0059] By setting the guide protrusion 19 and the guide ramp 20, the fluid medium can be guided to flow out from the connection opening 10 when it flows from bottom to top, reducing the upward driving force of the flowing medium on the cleaning plate 9. This reduces the resistance of the cleaning plate 9 during the downward flipping process when the cleaning plate 9 is driven to reset by the reset arc spring 15, and prevents the fluid medium from impacting the lower surface of the cleaning plate 9 and affecting the reset effect of the cleaning plate 9.

[0060] This invention protects the product structure; the model numbers of the components are not protected by this invention and are common technology. Any component on the market that can achieve the functions described above can be used as a check valve structure with a cleaning mechanism. Therefore, the model numbers and other parameters of the components are not described in detail in this invention. The contribution of this invention lies in the scientific combination of the various components.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions above are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents. Any aspects not detailed in the present invention are well-known to those skilled in the art.

Claims

1. A check valve structure with a cleaning mechanism, comprising a valve body, a flow port on the valve body for supplying medium, a valve seat disposed on the valve body within the flow port, a through hole disposed on the valve seat and communicating with the flow port, a sealing valve disc disposed on the valve body within the flow port for closing the through hole upon descent and opening the through hole upon descent, a guide member disposed between the valve seat and the sealing valve disc for guiding the descent direction of the sealing valve disc, and a compression spring disposed between the guide member and the sealing valve disc, characterized in that: It also includes a number of fixed seats that are equidistantly arranged in a ring on the valve body, located inside the flow port and above the through hole, and the fixed seats are fixedly arranged on the valve body; Several cleaning plates are respectively hinged to each of the fixed seats, and are used to be pushed upward by the sealing valve disc when the sealing valve disc rises; The reset limiting mechanism is respectively set between each of the cleaning plates and the fixed base. It is used to drive the cleaning plate to flip downward and reset after the sealing valve disc rises past the cleaning plate, and to restrict the cleaning plate from continuing to flip downward after resetting, so that the sealing valve disc is squeezed against the cleaning plate when it descends, and the attached impurities are cleaned.

2. A check valve structure with a cleaning mechanism according to claim 1, characterized in that: The cleaning plate has a connection opening and two hinge holes that communicate with the connection opening. The fixing base has two hinge rods for hinged engagement with the hinge holes, and the reset limiting mechanism is located between the hinge rods and the hinge holes.

3. A check valve structure with a cleaning mechanism according to claim 2, characterized in that: The reset limiting mechanism includes a limiting protrusion fixedly disposed on the hinge rod and located within the hinge hole; The cleaning plate is provided with an arc-shaped slide in the hinge hole. The arc-shaped slide is in clearance fit with the limiting protrusion and is connected to the hinge hole. A reset device is provided between the limiting protrusion and the cleaning plate in the arc-shaped slide. It is used to generate elastic potential energy when the cleaning plate is pushed upward by the rising sealing valve disc and flips. After the sealing valve disc rises past the cleaning plate, it drives the cleaning plate to flip downward and reset.

4. A check valve structure with a cleaning mechanism according to claim 3, characterized in that: The reset device includes a reset arc spring disposed between the limiting protrusion and the cleaning plate within an arc-shaped slide.

5. A check valve structure with a cleaning mechanism according to claim 4, characterized in that: An arc-shaped guide rod is provided on the cleaning plate within the arc-shaped slide. The reset arc-shaped spring is sleeved on the arc-shaped guide rod. The limiting protrusion has a guide hole for the arc-shaped guide rod to pass through when the cleaning plate is flipped up or down. The two ends of the reset arc-shaped spring abut against the limiting protrusion and the cleaning plate within the arc-shaped slide.

6. A check valve structure with a cleaning mechanism according to any one of claims 1 to 5, characterized in that: The cleaning plate is provided with an elastic contact plate, which is used to elastically squeeze the periphery of the sealing valve disc when the sealing valve disc descends, so as to reduce the damage to the sealing valve disc caused by hard friction and reduce the driving force required for the sealing valve disc to descend.

7. The check valve structure with a cleaning mechanism according to claim 2, characterized in that: The bottom of the cleaning plate is provided with a flow guide protrusion, which is used to guide the fluid medium to flow out of the connection opening when the fluid medium flows upward, so as to reduce the upward pushing force of the fluid medium on the cleaning plate; The bottom of the cleaning plate is provided with a flow guide slope, and both the flow guide slope and the flow guide protrusion are connected to the connection opening. This is used to further guide the fluid medium to flow towards the connection opening after the fluid medium comes into contact with the flow guide protrusion.

8. A check valve structure with a cleaning mechanism according to claim 7, characterized in that: The cleaning plate is provided with an elastic contact plate, which is used to elastically squeeze the periphery of the sealing valve disc when the sealing valve disc descends, so as to reduce the damage to the sealing valve disc caused by hard friction and reduce the driving force required for the sealing valve disc to descend; the flow guiding protrusion and flow guiding slope are provided on the elastic contact plate, and the connection opening is opened on the cleaning plate.

Images