Rolling device of double-clack check valve
By introducing a rolling device into the double-flap check valve, the wear problem caused by the relative movement between the valve disc and the spring is solved, achieving the effect of reducing maintenance costs and extending the life of the spring.
Patent Information
- Application Number
- CN202421867936.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-03
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-08-03
AI Technical Summary
When the existing double-flap check valve is in use, the relative movement between the valve flap and the spring causes severe wear, which increases maintenance costs and inconveniences in use.
The rolling device is used to replace the relative movement of the butterfly plate and the spring through the friction between the rolling rod and the butterfly plate, thereby reducing friction.
Extends the service life of the spring and reduces maintenance frequency and cost.
Smart Images
Figure CN223331156U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a rolling device of a double-flap check valve. Background Art
[0002] Double-flap check valves are used in pure pipelines and water supply and drainage pipelines for industry, environmental protection, water treatment, and high-rise buildings to prevent the reverse flow of media. The check valve adopts a clamping type, the butterfly plate is two semicircles, and is forced to reset by a spring. The sealing surface can be a wear-resistant material welded on the body or lined with rubber. The butterfly plate opens under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, in the use of the existing technology, when the valve disc is opened, one end of the two sets of valve discs moves relative to the two ends of the spring, and performs hard friction. When the spring closes the two sets of valve discs, one end of the valve disc also moves relative to the two ends of the spring. Long-term friction use causes serious wear of one end of the valve disc and the two ends of the spring, and the spring needs to be replaced, which increases maintenance costs and delays use. Utility Model Content
[0003] The purpose of the utility model is to provide a rolling device for a double-flap check valve, which can reduce the relative friction between the valve flap and the spring and increase the service life of the spring.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rolling device of a double-flap check valve, comprising a valve body, a valve stem, a hinged rod, a compression spring assembly, a left butterfly plate and a right butterfly plate, wherein the left butterfly plate and the right butterfly plate are symmetrically arranged in a fan shape and hinged on the valve stem, one end of the compression spring assembly is sleeved on the hinged rod and the other end is elastically pressed against the left butterfly plate and the right butterfly plate respectively, the compression spring assembly comprises two left compression springs and a right compression spring, the two left compression springs and the right compression springs are staggered and sleeved on the hinged rod, and two groups of symmetrically arranged rolling assemblies are respectively clamped on the extension sections on the two left compression springs and the right compression springs, the rolling assembly comprises a positioning panel and several arrays of rolling rods, the two ends of the positioning panel are respectively clamped on the extension sections of the two left compression springs, the rolling rod is rotatably arranged on the positioning panel and pressed against the left butterfly plate and the right butterfly plate.
[0005] Preferably, a first mounting hole and a second mounting hole are respectively opened on both sides of the positioning panel, and a first support leg and a second support leg are respectively extended from the two left compression springs, and the first support leg and the second support leg are respectively inserted into the first mounting hole and the second mounting hole.
[0006] Preferably, a groove adapted to the rolling rod is provided on the side of the positioning panel facing the left butterfly plate, and the rolling rod is installed in the groove.
[0007] Preferably, a first rotating part and a second rotating part are respectively provided at both ends of the rolling rod, and a first fixed part and a second fixed part corresponding to the first rotating part and the second rotating part are provided on the positioning panel, and a first fixing hole and a second fixing hole adapted to the first rotating part and the second rotating part are opened on the first fixing part and the second fixing part.
[0008] Preferably, a rotating rod and a limit block are sequentially provided on the first rotating part, one end of the rotating rod is connected to the rolling rod, and the other end is connected to the limit block through the first fixing hole, and the limit block is tightly pressed against one side of the first fixing hole. The limit block is set in a conical shape and is set in a gradually expanding state toward the side of the first fixing hole.
[0009] Preferably, the rotating rod and the limiting block are provided with communicating openings.
[0010] Preferably, the first fixing portion and the second fixing portion are located on one side of the limiting block and are respectively provided with a first telescopic groove and a second telescopic groove.
[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the two ends of the rolling rod are plugged into the first fixing hole and the second fixing hole at one time through the limit blocks on the rotating rod. After the array is installed, the positioning panel is plugged into and installed with the first support leg and the second support leg, and then fixed by welding. When the left butterfly plate and the right butterfly plate are opened or closed, friction is generated with the rolling rod, and the rolling rod reduces friction by rolling, and can avoid friction between the butterfly plate and the compression spring. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a cross-sectional view of the overall structure of the utility model;
[0013] Figure 2 This is a structural diagram of the left butterfly plate, right butterfly plate and compression spring assembly of the utility model;
[0014] Figure 3 This is a schematic structural diagram of the compression spring assembly and rolling assembly of the utility model;
[0015] Figure 4 This is an exploded view of the local structure of the rolling assembly of the utility model;
[0016] Figure 5 A portion of the utility model is an enlarged view;
[0017] Figure 6 This is an enlarged view of part B of the present invention.
[0018] In the figure: 1. valve body; 2. valve stem; 3. hinged rod; 4. compression spring assembly; 5. left butterfly plate; 8. right butterfly plate; 9. left compression spring; 10. right compression spring; 11. rolling assembly; 12. positioning panel; 13. rolling rod; 14. first mounting hole; 15. second mounting hole; 16. first support leg; 17. second support leg; 18. groove; 19. first rotating part; 20. second rotating part; 21. first fixing part; 23. second fixing part; 24. first fixing hole; 25. second fixing hole; 26. rotating rod; 27. limit block; 28. clearance opening; 29. first telescopic slot; 30. second telescopic slot. DETAILED DESCRIPTION
[0019] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0020] Example: As shown in the attached Figures 1 to 5 The rolling device of a double-flap check valve shown in the figure includes a valve body 1, a valve stem 2, a hinged rod 3, a compression spring assembly 4, a left butterfly plate 5 and a right butterfly plate 8. The left butterfly plate 5 and the right butterfly plate 8 are symmetrically arranged in a fan shape and are hinged to the valve stem 2. One end of the compression spring assembly 4 is sleeved on the hinged rod 3 and the other end is elastically pressed against the left butterfly plate 5 and the right butterfly plate 8 respectively. The compression spring assembly 4 includes two left compression springs 9 and a right compression spring 10. The two left compression springs 9 and the right compression springs 10 are staggered and sleeved on the hinged rod 3 (specifically, they are staggered horizontally). Two groups of symmetrically arranged rolling assemblies 11 are respectively clamped on the extending sections of the two left compression springs 9 and the right compression springs 10. The rolling assembly 11 includes a positioning panel 12 and a plurality of arrays provided with rolling assemblies. The movable rod 13 (specifically, there are six), the two ends of the positioning panel 12 are respectively clamped on the extension sections of the two left compression springs 9, the rolling rod 13 is rotatably set on the positioning panel 12 and pressed against the left butterfly plate 5 and the right butterfly plate 8, and the two ends of the rolling rod 13 are plugged into the first fixing hole 24 and the second fixing hole 25 at one time through the limit block 27 on the rotating rod 26. After the array is installed, the positioning panel 12 is plugged and installed with the first support leg 16 and the second support leg 17, and then fixed by welding. When the left butterfly plate 5 and the right butterfly plate 8 are opened or closed, friction is formed with the rolling rod 13, and the rolling rod 13 reduces friction by rolling, and can avoid friction between the butterfly plate and the compression spring.
[0021] As attached Figure 3As shown, a first mounting hole 14 and a second mounting hole 15 are respectively provided on both sides of the positioning panel 12, and a first support leg 16 and a second support leg 17 (an integrated structure) are respectively extended from the two left compression springs 9. The first support leg 16 and the second support leg 17 are respectively inserted into the first mounting hole 14 and the second mounting hole 15, so that the pressure of the compression spring can be evenly distributed on the positioning panel 12, and welding is adopted to prevent the positioning panel 12 from falling off.
[0022] As attached Figure 4 As shown, the positioning panel 12 is provided with a groove 18 adapted to the rolling rod 13 on the side facing the left butterfly plate 5 , and the rolling rod 13 is installed in the groove 18 to stabilize the rolling stroke of the rolling rod.
[0023] As attached Figure 4 and attached Figure 6 As shown, a first rotating portion 19 and a second rotating portion 20 (an integrated structure) are respectively provided at both ends of the rolling rod 13, and a first fixing portion 21 and a second fixing portion 23 (an integrated structure) corresponding to the first rotating portion 19 and the second rotating portion 20 are provided on the positioning panel 12. A first fixing hole 24 and a second fixing hole 25 adapted to the first rotating portion 19 and the second rotating portion 20 are opened on the first fixing portion 21 and the second fixing portion 23, so that the rolling rod 13 is rotatably mounted and is not easy to fall off.
[0024] As attached Figure 5 As shown, a rotating rod 26 and a limit block 27 (an integrated structure) are sequentially provided on the first rotating portion 19. One end of the rotating rod 26 is connected to the rolling rod 13, and the other end passes through the first fixing hole 24 and is connected to the limit block 27. The limit block 27 is tightly pressed against one side of the first fixing hole 24. The limit block 27 is set in a conical shape and is gradually expanded toward the side of the first fixing hole 24. The limit block 27 is used for limiting the engagement.
[0025] As attached Figure 5 As shown, the rotating rod 26 and the limit block 27 are provided with a communicating clearance opening 28. During installation, the limit block 27 is squeezed inward to retract through the first fixing hole 24 and the second fixing hole 25, and the rear limit block 27 is reset to form a snap connection to prevent the rolling rod 13 from falling.
[0026] As attached Figure 4 and attached Figure 6 As shown, the first fixing portion 21 and the second fixing portion 23 are respectively provided with a first telescopic groove 29 and a second telescopic groove 30 on one side of the limit block 27, which facilitates the installation of the rolling rod 13. When the limit block 27 on one side is plugged in and installed, it continues to extend toward the first telescopic groove 29 to make way for the rotating rod 26 and the limit block 27 on the other side to be installed.
[0027] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and cannot be understood as a limitation on the present invention.
Claims
1. A rolling device for a double-flap check valve, comprising a valve body (1), a valve stem (2), a hinged rod (3), a compression spring assembly (4), a left butterfly plate (5), and a right butterfly plate (8), wherein the left butterfly plate (5) and the right butterfly plate (8) are symmetrically arranged in a fan-shaped shape and hinged to the valve stem (2), and one end of the compression spring assembly (4) is sleeved on the hinged rod (3) and the other end is elastically pressed against the left butterfly plate (5) and the right butterfly plate (8), respectively, and characterized in that: The compression spring assembly (4) includes two left compression springs (9) and a right compression spring (10), and the two left compression springs (9) and the right compression spring (10) are staggered and sleeved on the hinge rod (3). The extension sections of the two left compression springs (9) and the right compression springs (10) are respectively clamped with two groups of symmetrically arranged rolling assemblies (11). The rolling assembly (11) includes a positioning panel (12) and a plurality of arrays of rolling rods (13). The two ends of the positioning panel (12) are respectively clamped on the extension sections of the two left compression springs (9). The rolling rods (13) are rotatably arranged on the positioning panel (12) and pressed against the left butterfly plate (5) and the right butterfly plate (8).
2. The rolling device of a double-flap check valve according to claim 1, characterized in that: A first mounting hole (14) and a second mounting hole (15) are respectively provided on both sides of the positioning panel (12); a first support leg (16) and a second support leg (17) are respectively extended from the two left compression springs (9); the first support leg (16) and the second support leg (17) are respectively inserted into the first mounting hole (14) and the second mounting hole (15).
3. The rolling device of a double-flap check valve according to claim 2, characterized in that: The positioning panel (12) is provided with a groove (18) adapted to the rolling rod (13) on one side facing the left butterfly plate (5), and the rolling rod (13) is installed in the groove (18).
4. The rolling device of a double-flap check valve according to claim 1, characterized in that: A first rotating portion (19) and a second rotating portion (20) are respectively provided at both ends of the rolling rod (13); a first fixing portion (21) and a second fixing portion (23) corresponding to the first rotating portion (19) and the second rotating portion (20) are provided on the positioning panel (12); and a first fixing hole (24) and a second fixing hole (25) adapted to the first rotating portion (19) and the second rotating portion (20) are opened on the first fixing portion (21) and the second fixing portion (23).
5. The rolling device of a double-flap check valve according to claim 4, characterized in that: A rotating rod (26) and a limiting block (27) are sequentially provided on the first rotating portion (19); one end of the rotating rod (26) is connected to the rolling rod (13), and the other end passes through the first fixing hole (24) and is connected to the limiting block (27); the limiting block (27) is tightly pressed against one side of the first fixing hole (24); the limiting block (27) is conical in shape and is gradually expanded toward the first fixing hole (24).
6. The rolling device of a double-flap check valve according to claim 5, characterized in that: The rotating rod (26) and the limiting block (27) are provided with communicating openings (28).
7. The rolling device of a double-flap check valve according to claim 5, characterized in that: The first fixing portion (21) and the second fixing portion (23) are located on one side of the limiting block (27) and are respectively provided with a first telescopic slot (29) and a second telescopic slot (30).