Lifting type check valve

Abstract

The invention relates to the technical field of check valves for water purifiers, in particular to a lifting type check valve which comprises a valve body, a valve clack and a valve deck, an inlet pipeline and an outlet pipeline are arranged in the valve body, and a valve seat is arranged between the inlet pipeline and the outlet pipeline; a valve seat channel corresponding to the valve seat is arranged in the valve body, and the valve clack is arranged in the valve seat channel and matched with the valve seat. A connecting block is arranged on the valve clack and extends towards the inlet pipe, a filtering piece is connected to the connecting block in a sliding mode in the axial direction, and the end of the filtering piece is located in the inlet pipe and connected with the pipe wall of the inlet pipe. According to the check valve, the problems that the check valve is prone to being blocked, the limiting block slides in the hollow sliding groove to be blocked, and water flow is not smooth or completely cannot circulate are solved.

Description

Technical Field

[0001] The present application relates to the technical field of check valves for water purifiers, and more specifically, to a lifting check valve. Background Art

[0002] A check valve is a valve whose opening and closing parts are circular discs and which rely on their own weight and medium pressure to produce movement to block the backflow of the medium. The working principle of the check valve is to rely on the weight of the parts and the medium pressure to achieve automatic opening and closing, thereby preventing the backflow of the medium. When the medium flows in from the inlet and flows out from the outlet, the disc opens under the action of the medium pressure; when the inlet pressure is less than the sum of the disc weight and its flow resistance or the medium flows back, the disc closes under the dual action of its own weight and the backflow medium pressure to prevent the backflow of the medium. In water purification equipment, if shutdown or unstable operation occurs, liquid reflux or even reverse flow may occur. If the filtered sewage is retained in the unfiltered part, it will seriously affect the quality of purified water. The check valve can effectively prevent this from happening.

[0003] The related technology reference patent number is CN219827830U, which discloses a lifting check valve, which includes a valve body, the valve body includes a first cavity, a second cavity and a top cavity, the first cavity is connected to the first connecting port, the second cavity is connected to the second connecting port, the two ends of the top cavity are respectively connected to the first cavity and the second cavity, a sealing port is arranged between the first box body and the top cavity, a valve cover is arranged at the top cavity, a bottom protrusion is arranged at the bottom of the valve cover, a limiting bottom plate with a middle through hole is arranged at the bottom side of the bottom protrusion, the inner side of the bottom protrusion is a hollow slide groove, the slide groove is slidably connected with a seal, the seal includes a limit stop, a slide rod and a sealing cover, the limit stop and the limit bottom plate cooperate for the sliding state of the seal and the slide groove, and the seal cooperates with the sealing port. During operation, dirt may accumulate in the first cavity, the second cavity and the top cavity, causing the check valve to become clogged easily, causing the limit stop to slide and get stuck in the hollow slide groove, resulting in poor water flow or complete inability to flow. Summary of the invention

[0004] The technical problem to be solved by the present application is that the check valve is prone to clogging, causing the limit stop to slide and get stuck in the hollow slide groove, resulting in poor water flow or complete inability to flow. In view of the above-mentioned defects of the prior art, a lifting check valve is provided.

[0005] The technical solution adopted by this application to solve its technical problem is:

[0006] A lifting check valve comprises a valve body, a valve disc and a valve cover, wherein an inlet pipe and an outlet pipe are arranged in the valve body, and a valve seat is arranged between the inlet pipe and the outlet pipe; a valve seat channel is arranged in the valve body corresponding to the valve seat, and the valve disc is arranged in the valve seat channel and cooperates with the valve seat; a connecting block is arranged on the valve disc extending toward the inlet pipe, and a filter element is connected to the connecting block along the axial sliding direction; the end of the filter element is located in the inlet pipe and connected to the pipe wall of the inlet pipe.

[0007] By adopting the above technical solution, in the process of transporting the fluid medium, the fluid medium passes through the inlet pipe and is filtered by the filter element before entering the valve seat channel. The filter element can effectively filter the solid particle impurities in the fluid medium, reduce the deposition of solid particle impurities in the valve seat channel and affect the movement of the valve disc, thereby reducing the occurrence of check valve blockage.

[0008] Preferably, the filter element comprises a filter plate and a connecting portion, the filter plate is coaxially connected to the connecting portion, a mounting tongue is provided on the circumferential surface of the connecting portion, and a mounting groove is provided on the inner wall of the inlet pipe corresponding to the mounting tongue.

[0009] By adopting the above technical solution, neither the filtration of the fluid medium nor the normal transportation of the fluid medium is affected; in the process of filtering the fluid medium, the tongue buckle is installed to fix the filter plate and the connecting part inside the inlet channel so that they do not move with the movement of the valve disc, thereby enhancing the stability of the filter element in the inlet channel without affecting the normal operation of the valve disc.

[0010] Preferably, friction strips are provided on the circumferential surfaces of the connecting portion and the inlet pipe that are in contact with each other.

[0011] By adopting the above technical solution, the friction strip can effectively increase the friction between the connecting part and the inlet pipe, thereby increasing the stability of the filter element to a certain extent.

[0012] Preferably, the filter element also includes a sliding portion, which is coaxially arranged with the connecting portion and slidably connected to the connecting portion, the cross-section of the sliding portion is T-shaped, and a sliding groove adapted to the sliding portion is axially opened on the connecting portion, the sliding groove and the sliding portion are clearance-matched, and a limiting plate is provided at the opening of the sliding groove, and the limiting plate is used to limit the sliding portion within the sliding groove.

[0013] By adopting the above technical solution, in the process of transmitting the fluid medium, the fluid medium flows through the valve seat and the valve disc through the inlet pipe, and flows into the outlet pipe after the valve disc is lifted up. When the valve disc is lifted up, the sliding part slides in the sliding groove; when the inside of the valve body needs to be inspected, the valve disc is removed from the valve seat, and the filter element can be taken out together with the valve disc with the cooperation of the sliding part and the limit plate.

[0014] Preferably, the filter element further comprises a connecting rod, which passes through the connecting part, the filter plate and the middle part of the sliding part in sequence along the axial direction, and quick-release baffles are provided at both ends of the connecting rod, and the quick-release baffles are used to restrict the connecting part, the filter plate and the sliding part to the connecting rod.

[0015] By adopting the above technical solution, the connecting rod can enhance the integrity between the connecting part, the filter plate and the sliding part. At the same time, the cooperation between the quick-release baffle and the connecting rod can also realize the rapid installation and disassembly of various components of the filter element, thereby facilitating the replacement of the filter element.

[0016] Preferably, the connecting portion is in a circular ring shape and is provided with a cross support in the middle, and the end of the sliding portion close to the filter plate is provided with a plurality of hollow holes.

[0017] By adopting the above technical solution, not only the overall mass of the filter element can be reduced, but also the resistance of the fluid medium flowing in the valve body can be reduced, making the transportation process of the fluid medium smoother.

[0018] Preferably, a filter plate is rotatably connected to the pipe opening of the inlet pipe in one direction, and the filter plate is rotatably connected to the inner wall of the inlet pipe via an elastic retaining spring.

[0019] Preferably, an abutment rod is provided on the side wall of the inlet pipe close to the filter element, and the side edge of the abutment rod abuts against the side wall of the filter plate. A limiting block is detachably connected to the side wall of the inlet pipe close to the filter plate, and the limiting block abuts against one side of the filter plate close to the filter element.

[0020] The beneficial effects of this application are:

[0021] 1. By setting the filter element, during the process of transporting the fluid medium, the fluid medium passes through the inlet pipe and is filtered by the filter element before entering the valve seat channel. The filter element can effectively filter the solid particle impurities in the fluid medium, reduce the situation where the solid particle impurities are deposited in the valve seat channel and affect the movement of the valve disc, thereby reducing the occurrence of check valve blockage;

[0022] 2. By setting the filter plate and the connection part, it does not affect the filtration of the fluid medium, nor does it affect the normal transportation of the fluid medium; in the process of filtering the fluid medium, the tongue buckle is installed to fix the filter plate and the connection part inside the inlet channel so that they do not move with the movement of the valve disc, thereby enhancing the stability of the filter element in the inlet channel;

[0023] 3. By setting the sliding part, it neither affects the filtration of the fluid medium nor the normal transportation of the fluid medium; in the process of filtering the fluid medium, the tongue buckle is installed to fix the filter plate and the connecting part inside the inlet channel so that they do not move with the movement of the valve disc, thereby enhancing the stability of the filter element in the inlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the present application will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0025] Figure 1 It is a schematic diagram of the overall structure of the lifting check valve according to the embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the structure of the filter element of the embodiment of the present application.

[0027] Explanation of the accompanying drawings: 1. valve body; 11. valve disc; 12. valve cover; 13. inlet pipe; 131. mounting groove; 14. outlet pipe; 15. valve seat; 16. valve seat channel; 17. connecting block; 171. sliding groove; 18. limit plate; 2. filter element; 21. filter plate; 22. connecting part; 221. cross support; 23. sliding part; 231. hollow perforation; 24. mounting tongue buckle; 25. friction strip; 26. connecting rod; 261. quick-release baffle; 3. filter plate; 31. abutment rod; 32. limit block. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0029] The preferred embodiment of this application is as follows Figure 1As shown, a lifting check valve includes a valve body 1, a valve disc 11 and a valve cover 12. An inlet pipe 13 and an outlet pipe 14 are arranged in the valve body 1, and a valve seat 15 is arranged between the inlet pipe 13 and the outlet pipe 14; a valve seat channel 16 is arranged in the valve body 1 corresponding to the valve seat 15, and the valve disc 11 is arranged in the valve seat channel 16 and cooperates with the valve seat 15; a connecting block 17 is extended toward the inlet pipe on the valve disc 11, and a filter element 2 is axially slidably connected to the connecting block 17, and the end of the filter element 2 is located in the inlet pipe 13 and connected to the pipe wall of the inlet pipe 13.

[0030] The filter element 2 includes a filter sheet 21, a connecting portion 22, a sliding portion 23 and a connecting rod 26. The filter sheet 21 is coaxially connected to the connecting portion 22. A mounting tongue 24 is provided on the peripheral surface of the connecting portion 22. A mounting groove 131 is provided on the inner wall of the inlet pipe 13 corresponding to the mounting tongue 24. The filter sheet 21 can filter the fluid medium.

[0031] During the transportation of the fluid medium, the fluid medium passes through the inlet pipe 13 and is filtered by the filter element 2 before entering the valve seat channel 16. The filter element 2 can effectively filter the solid particle impurities in the fluid medium, reduce the deposition of solid particle impurities in the valve seat channel 16 and affect the movement of the valve disc 11, thereby reducing the occurrence of check valve blockage.

[0032] It neither affects the filtration of the fluid medium nor the normal transportation of the fluid medium; in the process of filtering the fluid medium, the tongue buckle 24 is installed to fix the filter plate 21 and the connecting part 22 inside the inlet channel so that they do not move with the movement of the valve flap 11, thereby enhancing the stability of the filter element 2 in the inlet channel.

[0033] The connecting portion 22 is annular and has a cross support 221 in the middle. The sliding portion 23 has a plurality of hollow holes 231 at the end close to the filter plate 21. The connecting portion 22 and the inlet pipe 13 are both provided with friction strips 25 on the circumference thereof.

[0034] The friction strip 25 can effectively increase the friction between the connecting portion 22 and the inlet pipe 13, thereby increasing the stability of the filter element 2 to a certain extent.

[0035] The sliding portion 23 is coaxially arranged with the connecting portion 22 and is slidably connected to the connecting block 17. The cross-section of the sliding portion 23 is T-shaped. A sliding groove 171 adapted to the sliding portion 23 is axially opened on the connecting block 17. The sliding groove 171 is clearance-matched with the sliding portion 23. A limiting plate 18 is provided at the opening of the sliding groove 171. The limiting plate 18 is used to limit the sliding portion 23 within the sliding groove 171.

[0036] During the transmission of the fluid medium, the fluid medium flows through the valve seat 15 and the valve disc 11 through the inlet pipe 13, and lifts the valve disc 11 and then flows into the outlet pipe 14. When the valve disc 11 is lifted, the sliding part 23 slides in the sliding groove 171; when the inside of the valve body 1 needs to be inspected, the valve disc 11 is removed from the valve seat 15, and at the same time, the filter element 2 can be taken out together with the valve disc 11 with the cooperation of the sliding part 23 and the limit plate 18.

[0037] The connecting rod 26 axially passes through the connecting portion 22 , the filter plate 21 and the middle portion of the sliding portion 23 in sequence. Quick-release baffles 261 are provided at both ends of the connecting rod 26 . The quick-release baffles 261 are used to restrict the connecting portion 22 , the filter plate 21 and the sliding portion 23 on the connecting rod 26 .

[0038] The connecting rod 26 can enhance the integrity between the connecting portion 22, the filter plate 21 and the sliding portion 23. At the same time, the cooperation between the quick-release baffle 261 and the connecting rod 26 can also realize the rapid installation and removal of various components of the filter element 2, thereby facilitating the replacement of the filter element 2.

[0039] The inlet pipe 13 is rotatably connected to the filter plate 3 at its mouth, and the filter plate 3 is rotatably connected to the inner wall of the inlet pipe 13 through an elastic retaining spring. An abutment rod 31 is provided on the side wall of the inlet pipe 13 close to the filter element 2, and the side of the abutment rod 31 abuts against the side wall of the filter plate 3. A limit block 32 is detachably connected to the side wall of the inlet pipe 13 close to the filter plate 3, and the limit block 32 abuts against one side of the filter plate 3 close to the filter element 2.

[0040] The implementation principle of a lifting check valve in an embodiment of the present application is as follows: in the process of transporting a fluid medium, the fluid medium passes through an inlet pipe 13, is first filtered by a filter disc 21, and then flows through a filter element 2. The filter element 2 can effectively filter solid particle impurities in the fluid medium, reduce the deposition of solid particle impurities in the valve seat channel 16 and affect the movement of the valve flap 11, thereby reducing the occurrence of blockage of the check valve; at the same time, it neither affects the filtration of the fluid medium nor the normal transportation of the fluid medium; in the process of filtering the fluid medium, the tongue buckle 24 is installed to fix the filter disc 21 and the connecting part 22 inside the inlet channel so that they do not move with the movement of the valve flap 11, thereby enhancing the stability of the filter element 2 in the inlet channel and not affecting the normal operation of the valve flap 11.

[0041] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A lift check valve, comprising a valve body, a valve disc and a valve cover, wherein an inlet pipe and an outlet pipe are arranged in the valve body, and a valve seat is arranged between the inlet pipe and the outlet pipe; characterized in that: A valve seat channel is provided in the valve body corresponding to the valve seat, and the valve flap is provided in the valve seat channel and cooperates with the valve seat; a connecting block is provided on the valve flap extending toward the inlet pipe, and a filter is connected to the connecting block along the axial sliding direction; the end of the filter is located in the inlet pipe and connected to the pipe wall of the inlet pipe.

2. A lift check valve according to claim 1, characterized in that: The filter element comprises a filter plate and a connecting portion, wherein the filter plate is coaxially connected to the connecting portion, a mounting tongue buckle is arranged on the peripheral surface of the connecting portion, and a mounting groove is arranged on the inner wall of the inlet pipe corresponding to the mounting tongue buckle.

3. A lift check valve according to claim 2, characterized in that: Friction strips are arranged on the peripheral surfaces of the connecting portion and the inlet pipe that are in contact with each other.

4. A lift check valve according to claim 2, characterized in that: The filter element also includes a sliding portion, which is coaxially arranged with the connecting portion and slidably connected to the connecting block. The cross-section of the sliding portion is T-shaped. A sliding groove adapted to the sliding portion is axially opened on the connecting block. The sliding groove and the sliding portion are clearance-matched. A limiting plate is arranged at the opening of the sliding groove, and the limiting plate is used to limit the sliding portion within the sliding groove.

5. A lift check valve according to claim 3, characterized in that: The filter element also includes a connecting rod, which passes through the connecting part, the filter plate and the middle part of the sliding part in sequence along the axial direction. Quick-release blocking plates are provided at both ends of the connecting rod, and the quick-release blocking plates are used to limit the connecting part, the filter plate and the sliding part on the connecting rod.

6. A lift check valve according to claim 2, characterized in that: The connecting portion is in a circular ring shape and is provided with a cross support in the middle, and a plurality of hollow holes are provided at the end of the sliding portion close to the filter plate.

7. A lift check valve according to claim 1, characterized in that: A filter plate is rotatably connected to the pipe opening of the inlet pipe in one direction, and the filter plate is rotatably connected to the inner wall of the inlet pipe through an elastic retaining spring.

8. A lift check valve according to claim 7, characterized in that: A contact rod is arranged on the side wall of the inlet pipe close to the filter element, and the side edge of the contact rod contacts the side wall of the filter plate. A limit block is detachably connected to the side wall of the inlet pipe close to the filter plate, and the limit block contacts the side of the filter plate close to the filter element.

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