Full-rubber-covered wafer type check valve

Abstract

The utility model discloses a full rubber covered wafer type check valve, which relates to the technical field of valves and comprises a valve seat, a valve rod is mounted in the valve seat, two valve clacks are sleeved on the outer side of the valve rod, torsion springs are arranged between the valve rod and the two valve clacks, a limit ring is mounted in the valve seat and positioned on one side of the two valve clacks, and the limit ring is sleeved on the valve rod. And a sealing ring is mounted on one side of the limiting ring. The full-rubber-covered wafer type check valve has the advantages that through the sealing ring on one side of the limiting ring and the rubber layer on the surface of the valve clack, the sealing performance between the valve clack and the limiting ring and the sealing performance between the valve clack and the valve seat are improved, leakage is prevented, meanwhile, under the action of the sliding type push rod arranged in front of the valve clack, deformation of the spring on the outer side of the sliding type push rod is matched, and the sealing performance is improved. When fluid circulates, the push rod is squeezed to quickly push the valve clack open and assist the valve clack in folding, resistance borne by the valve clack is reduced, impact force of the fluid is buffered, and damage to the valve clack and the valve body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a fully rubber-covered wafer-type check valve. Background Art

[0002] The check valve is a pipe fitting, which is mainly used to prevent the backflow of fluid in the pipe system. It can effectively prevent the backflow of the medium, avoid the mixing of different mediums, and ensure the stability and safety of the production process. The valve is widely used in pipelines, pumping stations, water treatment, chemical industry, petroleum and other fields.

[0003] Application No. 202222276963.7 discloses a clamp-type check valve, which has an external threaded barrel connected by a threaded structure. The external threaded barrel can be disassembled by means of a sleeve and a hexagonal end. After the disassembled external threaded barrel is taken out, the spring of the valve stem jacket can be smoothly taken out, and then the spring that has elastic fatigue can be replaced, saving costs.

[0004] The valve body structure of the above application has poor sealing performance and forms a relatively closed space at the valve, which will generate certain resistance in the pipeline system, increase energy consumption, and easily cause water hammer phenomenon, causing damage to the valve body. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a fully rubber-covered wafer-type check valve, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a fully rubber-covered clamp-type check valve, comprising a valve seat, a valve stem is installed inside the valve seat, two valve flaps are sleeved on the outside of the valve stem, a torsion spring is arranged between the valve stem and the two valve flaps, a limit ring is installed inside the valve seat and on one side of the two valve flaps, a sealing ring is installed on one side of the limit ring, a rubber layer is installed on the outside of the two valve flaps, a support frame is installed inside the valve seat and on the side of the limit ring away from the two valve flaps, a push rod is slidably connected to the inside of the support frame, and a telescopic spring is sleeved on the outside of the push rod.

[0007] Preferably, a filter plate is threadedly connected inside the valve seat and at one end of the two push rods away from the valve disc.

[0008] Preferably, the outer wall of the filter plate and the inner wall of the valve seat are respectively provided with threads that cooperate with each other.

[0009] Preferably, the structures of the two valve flaps are both semicircular, and the outer diameters of the two valve flaps are consistent with the inner diameter of the valve seat.

[0010] Preferably, a screw is threadedly connected between the valve seat and the valve stem.

[0011] Preferably, a first threaded hole and a second threaded hole matching with screws are respectively formed on the corresponding sides of the valve seat and the valve stem.

[0012] The utility model provides a fully rubber-covered wafer-type check valve, which has the following beneficial effects:

[0013] 1. The fully rubber-covered wafer-type check valve, through the sealing ring on one side of the limit ring and the rubber layer on the surface of the valve disc, is conducive to increasing the sealing between the valve disc, the limit ring and the valve seat to prevent leakage. At the same time, under the action of the sliding push rod arranged in front of the valve disc, combined with the deformation of its outer spring, when the fluid flows, the push rod can be squeezed to quickly push the valve disc open, assisting the valve disc to fold in half, which is conducive to reducing the resistance of the valve disc, and buffering the impact force of the fluid, which is conducive to reducing the damage to the valve disc and the valve body.

[0014] 2. The fully rubber-covered wafer-type check valve can intercept large particles or fibers and other impurities in the fluid through the filter plate installed in the valve seat to avoid blockage. The threaded connection is easy to replace. Similarly, the valve stem is fixed with screws, which facilitates the installation and disassembly of the valve stem, valve disc and torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a front sectional view of the utility model;

[0017] Figure 3 This is a schematic diagram of the operation of the utility model;

[0018] Figure 4 It is a side sectional view of the utility model.

[0019] In the figure: 1. valve seat; 2. valve stem; 3. valve disc; 4. torsion spring; 5. limit ring; 6. support frame; 7. push rod; 8. telescopic spring; 9. sealing ring; 10. rubber layer; 11. filter plate; 12. screw; 13. first threaded hole; 14. second threaded hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figures 1 to 4The utility model provides a technical solution: a fully rubber-covered wafer-type check valve, comprising a valve seat 1, a valve stem 2 is installed inside the valve seat 1, two valve flaps 3 are sleeved on the outer side of the valve stem 2, and a torsion spring 4 is arranged between the valve stem 2 and the two valve flaps 3. When the fluid flows, the two valve flaps 3 can rotate accordingly and automatically fold in half, thereby expanding the gap between the two valve flaps 3 and the valve stem 2 so that the fluid can pass through. A limiting ring 5 is installed inside the valve seat 1 and on one side of the two valve flaps 3 to limit the valve flap 3 so that the valve flap 3 It cannot rotate in the opposite direction, which is beneficial to avoid fluid backflow. A sealing ring 9 is installed on one side of the limit ring 5. A rubber layer 10 is installed on the outer sides of the two valve flaps 3. The structures of the two valve flaps 3 are semicircular. The outer diameters of the two valve flaps 3 are consistent with the inner diameter of the valve seat 1. They fit the inner wall of the valve seat 1 and the sealing ring 9 respectively, which is beneficial to increase the sealing between the valve flap 3 and the sealing ring 9 and the valve stem 2 respectively. A support frame 6 is installed inside the valve seat 1 and on the side of the limit ring 5 away from the two valve flaps 3. The internal sliding connection of the support frame 6 There is a push rod 7, and a telescopic spring 8 is sleeved on the outer side of the push rod 7. When impacted by the fluid, it automatically moves and pushes the two valve flaps 3 to flip, assisting the valve flap 3 to fold in half, which is beneficial to reducing the resistance of the valve flap 3 and resetting it under the action of the telescopic spring 8. At the same time, the impact force of the fluid is damped and buffered. The inside of the valve seat 1 and the end of the two push rods 7 away from the valve flap 3 are threadedly connected with a filter plate 11 to intercept large particles or impurities such as fibers in the fluid, which is beneficial to avoid clogging. The outer wall of the filter plate 11 and the inner wall of the valve seat 1 are respectively provided with mutually matching threads, and the detachable structure is convenient for replacing the filter plate 11. A screw 12 is threadedly connected between the valve seat 1 and the valve stem 2. The corresponding two sides of the valve seat 1 and the valve stem 2 are respectively provided with a first threaded hole 13 and a second threaded hole 14 that match the screw 12. When the screw 12 rotates, one end of it passes through the first threaded hole 13 and the second threaded hole 14 in sequence to fix the valve stem 2, or separate from it, which is convenient for disassembly of the valve stem 2 and replacement of the valve flap 3 and the torsion spring 4.

[0022] In summary, when the fully rubber-covered wafer-type check valve is used, the fluid enters the valve seat 1, and after being filtered by the filter plate 11, squeezes the push rods 7 in the two support frames 6, causing one end of the push rods 7 to displace and push the two valve flaps 3 on the valve stem 2 to flip. At the same time, the telescopic spring 8 on the outer side of the push rod 7 is deformed accordingly to buffer the impact of the fluid. The two valve flaps 3 are folded in half as the fluid flows, allowing the fluid to pass through the gap between the two valve flaps 3 and the valve seat 1. When the fluid stops or flows back, the torque between the valve stem 2 and the two valve flaps 3 is Under the action of the spring 4, the two valve flaps 3 are pushed to reset and fit with the sealing ring 9 on one side of the limit ring 5. Due to the limitation of the limit ring 5, the two valve flaps 3 cannot be folded in reverse, thereby closing the valve seat 1. When the valve stem 2, valve flap 3, and torsion spring 4 need to be replaced, the two screws 12 between the valve seat 1 and the valve stem 2 are rotated to disengage one end of the two screws 12 from the first threaded hole 13 and the second threaded hole 14 in the valve seat 1 and the valve stem 2 respectively, and the valve stem 2 together with the valve flap 3 and the torsion spring 4 are taken out from the valve seat 1.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully rubber-covered wafer-type check valve, comprising a valve seat (1), characterized in that: A valve stem (2) is installed inside the valve seat (1), and two valve flaps (3) are sleeved on the outer side of the valve stem (2). A torsion spring (4) is arranged between the valve stem (2) and the two valve flaps (3). A limit ring (5) is installed inside the valve seat (1) and on one side of the two valve flaps (3). A sealing ring (9) is installed on one side of the limit ring (5). A rubber layer (10) is installed on the outer side of the two valve flaps (3). A support frame (6) is installed inside the valve seat (1) and on the side of the limit ring (5) away from the two valve flaps (3). A push rod (7) is slidably connected inside the support frame (6), and a telescopic spring (8) is sleeved on the outer side of the push rod (7).

2. A fully rubber-covered wafer-type check valve according to claim 1, characterized in that: A filter plate (11) is threadedly connected inside the valve seat (1) and at one end of the two push rods (7) away from the valve disc (3).

3. A fully rubber-covered wafer-type check valve according to claim 2, characterized in that: The outer wall of the filter plate (11) and the inner wall of the valve seat (1) are respectively provided with mutually matching threads.

4. The fully rubber-covered wafer-type check valve according to claim 1, characterized in that: The structures of the two valve flaps (3) are both semicircular, and the outer diameters of the two valve flaps (3) are consistent with the inner diameter of the valve seat (1).

5. The fully rubber-covered wafer-type check valve according to claim 1, characterized in that: A screw (12) is threadedly connected between the valve seat (1) and the valve stem (2).

6. A fully rubber-covered wafer-type check valve according to claim 5, characterized in that: The valve seat (1) and the valve stem (2) are respectively provided with a first threaded hole (13) and a second threaded hole (14) which are matched with the screw (12).

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