Anti-backflow check valve device

Abstract

The utility model discloses an anti-backflow check valve device, and relates to the technical field of anti-backflow check valves, the anti-backflow check valve device comprises a shell, a taper sleeve is arranged on the inner side of the shell, limiting pieces are fixedly arranged in the taper sleeve and in the shell far away from the taper sleeve, valve rods are arranged in the two sets of limiting pieces in a sliding mode, valve cores are fixedly arranged on the valve rods, and the valve cores are arranged on the valve rods. The valve rod on one side of the valve element is sleeved with a spring, a plurality of blocking blocks are arranged on the other side of the valve element, a filter plate is arranged in the shell located at the front end of the valve element, a plurality of filter holes are formed in the filter plate, and the blocking blocks are matched with the filter holes in an inserted mode. When the valve core is closed, the plug block on the valve core is inserted into the filter hole, so that impurities blocked in the filter hole can be pushed out, the problem of blockage of the filter hole is effectively solved, and meanwhile, when the plug block is inserted into the filter hole, the filter hole is sealed, so that an additional sealing guarantee is provided, fluid is further prevented from flowing back, and the service life of the filter hole is prolonged. And the fluid backflow phenomenon is prevented.

Description

Technical Field

[0001] This utility model relates to the field of anti-backflow one-way valve technology, specifically an anti-backflow one-way valve device. Background Technology

[0002] A one-way throttle valve is a valve that controls fluid flow by changing the throttling cross-section or throttling length. One-way throttle valves are widely used in speed control and time delay circuits of hydraulic control systems; they can be used as both check valves and throttle valves.

[0003] According to Chinese Patent Publication No. CN220646883U, an anti-backflow one-way valve device is disclosed, belonging to the field of one-way valves. It includes a one-way valve body, with a mounting sealing plate installed at one end. A valve core and a spring are installed inside the one-way valve body. An adjustment structure is installed on the mounting sealing plate, consisting of a threaded rod and a rotating plate. The rotating plate is installed at the outer end of the threaded rod. A movable plate is installed inside the one-way valve body and at the inner end of the threaded rod. The movable plate is movably installed inside the one-way valve body and is rotatably connected to the threaded rod. The movable plate consists of a plate body and a connecting block, with the connecting block installed at the outer end of the plate body. By setting up the adjustment structure and the movable plate, when the spring force decreases, the adjustable structure can be rotated to push the movable plate towards the spring, thereby shortening the spring's working stroke and increasing the spring's elastic force. Ultimately, this allows the spring to continue to be used, extending its service life and reducing the operating cost of the one-way throttle valve.

[0004] It is known that due to long-term use and frequent switching operations, the seals of the check valve (such as valve core, sealing ring, etc.) may gradually wear or age, leading to seal failure. Seal failure can cause fluid backflow or backflow, which can damage the stability and safety of the system and increase maintenance costs and downtime. Utility Model Content

[0005] The purpose of this utility model is to provide a check valve device that prevents backflow. Due to long-term use and frequent switching operations, the seals of the check valve (such as valve core, sealing ring, etc.) may gradually wear or age, leading to seal failure. Seal failure can cause fluid backflow or backflow, which can damage the stability and safety of the system and increase maintenance costs and downtime.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a backflow prevention single-flow valve device, comprising a housing, a conical sleeve provided on the inner side of the housing, limiting components fixedly provided inside the conical sleeve and in the housing away from the conical sleeve, a valve stem slidably provided in the two sets of limiting components, a valve core fixedly provided on the upper part of the valve stem, a spring sleeved on the valve stem on one side of the valve core, and several blocking blocks provided on the other side of the valve core, a filter plate provided in the housing located at the front end of the valve core, the filter plate having several filter holes, and the blocking blocks being inserted into and engaged with the filter holes.

[0007] As a preferred embodiment of the anti-backflow single-flow valve device of this utility model, a buffer ring is provided on one side of the filter plate, and the buffer ring is close to the water inlet end of the outer shell.

[0008] As a preferred embodiment of the anti-backflow single-flow valve device of this utility model, the valve stem is respectively fixedly provided with a first round sleeve and a second round sleeve at both ends.

[0009] As a preferred embodiment of the anti-backflow single-flow valve device of this utility model, both sides of the second circular sleeve are provided with limit strips, and the limit strips are slidably connected to the limit grooves opened on the inner wall of the outer shell.

[0010] In a preferred embodiment of the anti-backflow single-flow valve device of this utility model, a pair of elastic elements are connected between the limiting strip and the limiting member.

[0011] As a preferred embodiment of the anti-backflow single-flow valve device of this utility model, a sealing ring is provided at the end of the cone sleeve, and the size of the sealing ring is adapted to the size of the rear end of the valve core.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention features a filter plate installed inside the housing. The filter holes on the filter plate filter the fluid entering the housing, reducing the amount of impurities entering. Simultaneously, when the valve core is closed, a plug on the valve core is inserted into the filter hole. This not only pushes out the impurities blocking the filter hole, effectively solving the problem of filter hole blockage, but also seals the filter hole when the plug is inserted, providing additional sealing protection and further preventing fluid backflow. This dual sealing mechanism effectively avoids the sealing failure problem that may occur after the valve core has been used for a long time, preventing fluid backflow. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a top view of the overall structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the present invention along line A to A;

[0017] Figure 4 This is a cross-sectional view of the outer shell structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the valve stem and other structures of this utility model;

[0019] Figure 6 This is a schematic diagram of the assembly of the filter plate, buffer ring, and filter holes of this utility model.

[0020] Reference numerals in the attached drawings: 1. Outer shell; 2. Conical sleeve; 3. Limiting element; 4. Valve stem; 5. Valve core; 6. Spring; 7. Circular sleeve one; 8. Circular sleeve two; 9. Limiting strip; 10. Filter plate; 11. Filter hole; 12. Buffer ring; 13. Limiting groove; 14. Elastic element; 15. Sealing ring; 16. Block. Detailed Implementation

[0021] Please see Figure 1-6 Figure shows an anti-backflow check valve device, including a housing 1, which is the main structure of the entire check valve device and is used to house and protect the internal components. It is usually made of corrosion-resistant, high-strength material to ensure stability and durability under various operating conditions. A cone sleeve 2 is located inside the housing 1 and has a cone-shaped design, close to the valve core 5. Its cone-shaped design helps guide fluid flow and ensures that the valve core 5 can fit tightly against the cone sleeve 2 to achieve an effective seal. Limiting elements 3 are fixedly installed inside the cone sleeve 2 and in the housing 1 away from the cone sleeve 2. Each limiting element 3 has a sliding hole in the middle for the valve stem 4 to slide inside it. The limiting element 3 not only provides a guiding function but also limits the range of motion of the valve stem 4, ensuring that the valve core 5 moves in the correct position.

[0022] A valve stem 4 is slidably installed within two sets of limiting components 3. The valve stem 4 can slide within the sliding hole. A valve core 5 is fixedly installed on the valve stem 4. A spring 6 is sleeved on the valve stem 4 on one side of the valve core 5. The size of the valve core 5 is adapted to the size of the cone sleeve 2. When the fluid pushes the valve core 5 to move, the valve core 5 squeezes the spring 6. At this time, the fluid can flow through the gap between the valve core 5 and the cone sleeve 2. When the spring 6 drives the valve core 5 to reset, the valve core 5 seals the cone sleeve 2 to prevent fluid backflow. The main function of the spring 6 is to provide restoring force so that the valve core 5 can automatically reset and seal the cone sleeve 2 without external pressure. The selection of the spring 6 needs to be adjusted according to the specific working pressure and flow requirements to ensure the best sealing effect.

[0023] In addition, a filter plate 10 is provided inside the outer shell 1 located at the front end of the valve core 5. The filter plate 10 has several filter holes 11. The filter holes 11 can filter the fluid entering the outer shell 1, intercepting particulate matter and other impurities, and preventing these impurities from entering the valve and causing wear or blockage. At the same time, several plugs 16 are provided on the other side of the valve core 5. The plugs 16 are inserted and cooperate with the filter holes 11. When the valve core 5 seals the cone sleeve 2, the plugs 16 will be inserted into the filter holes 11, thereby pushing out any impurities that may accumulate in the filter holes 11. This can also effectively solve the problem of filter hole blockage and ensure that the filter holes 11 are always unobstructed.

[0024] In addition, when the plug 16 is inserted into the filter hole 11, it not only cleans the filter hole 11 but also seals it, thereby preventing fluid flow. This design provides additional sealing protection when the valve core 5 is closed, further preventing fluid backflow and assisting the sealing of the valve core 5 against the cone sleeve 2. Through the double sealing mechanism, it effectively avoids the sealing failure problem that may occur after the valve core 5 has been used for a long time, and prevents the occurrence of fluid backflow.

[0025] A buffer ring 12 is provided on one side of the filter plate 10. The buffer ring 12 is close to the water inlet end of the outer casing 1. The buffer ring 12 buffers the impact of the fluid. The buffer ring 12 effectively absorbs and disperses the impact force when the fluid enters, protects the internal components from damage, and extends the service life of the equipment.

[0026] like Figure 5 As shown, circular sleeve 1 7 and circular sleeve 2 8 are fixedly installed at both ends of the valve stem 4, respectively. The circular sleeve 1 7 and circular sleeve 2 8 play a physical limiting role, preventing the valve stem 4 from sliding out or separating from the limiting member 3, ensuring that it is always in the correct position throughout the operation, providing an additional guiding function, helping the valve stem 4 to slide smoothly in the sliding hole of the limiting member 3, and reducing friction and wear.

[0027] Meanwhile, limit strips 9 are provided on both sides of the circular sleeve 2 8. The limit strips 9 are slidably connected to the limit grooves 13 opened on the inner wall of the outer shell 1. The cooperation between the limit strips 9 and the limit grooves 13 ensures that the valve stem 4 and the valve core 5 will not deviate or tilt during the movement, ensuring the precise alignment between the valve core 5 and the cone sleeve 2, improving the sealing performance. Through the above-mentioned optimized guiding and limiting mechanism, unnecessary friction and wear are reduced, and the service life of the equipment is extended.

[0028] A pair of elastic elements 14 are connected between the limiting strip 9 and the limiting member 3. The elastic elements 14 can absorb and buffer the vibration caused by fluid flow, reduce the overall system vibration, and ensure that the valve stem 4 and valve core 5 are more stable during operation. When the valve core 5 needs to be quickly reset, the spring 6 provides the main restoring force, while the elastic element 14 assists in this process. The elastic element 14 can provide additional restoring force when the valve core 5 is closed, helping the valve core 5 to return to the sealing position more quickly and improving the system response speed. The flexibility of the elastic element 14 makes the valve core 5 more smooth during opening and closing, reducing impact and noise.

[0029] like Figure 4 As shown, a sealing ring 15 is provided at the end of the cone sleeve 2. The size of the sealing ring 15 is adapted to the size of the rear end of the valve core 5. When the valve core 5 seals the cone sleeve 2, the sealing ring 15 contacts the rear end of the valve core 5 to enhance the sealing effect.

[0030] In summary: The fluid first passes through the filter holes 11 on the filter plate 10. The filter holes 11 intercept particulate matter and other impurities in the fluid, preventing these impurities from entering the valve and causing wear or blockage. The buffer ring 12 effectively absorbs and disperses the impact force when the fluid enters, reducing direct impact on internal components and extending the service life of the equipment. When the fluid pushes the valve core 5 upward, the valve core 5 compresses the spring 6. At this time, a gap is formed between the valve core 5 and the cone sleeve 2, allowing the fluid to continue flowing forward through the gap. The sliding hole in the limiting member 3 provides precise guidance for the valve stem 4, ensuring that the valve core 5 moves in the correct position. The first round sleeve 7 and the second round sleeve 8 further limit the range of motion of the valve stem 4, preventing it from sliding out or separating from the limiting member 3. When the valve core 5 seals the cone sleeve 2, the plug 16 is inserted into the filter hole 11, pushing out any impurities that may have accumulated in the filter hole 11, solving the problem of filter hole 11 blockage, and ensuring that the filter hole 11 is always unobstructed. When the plug 16 is inserted into the filter hole 11, it not only plays a cleaning role but also seals the filter hole 11 to prevent fluid flow.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A return fl ow preventing single flow valve device comprising a housing (1), characterized in that: The inner side of the shell (1) is provided with a taper sleeve (2), the inside of the taper sleeve (2) and the shell (1) away from the taper sleeve (2) are fixedly provided with a limiting piece (3), the limiting piece (3) is slidably provided with a valve rod (4) in the limiting piece (3), the upper end of the valve rod (4) is fixedly provided with a valve core (5), the valve rod (4) on one side of the valve core (5) is sleeved with a spring (6), the other side of the valve core (5) is provided with a plurality of plugs (16), the shell (1) at the front end of the valve core (5) is provided with a filter plate (10), a plurality of filter holes (11) are formed in the filter plate (10), and the plug (16) is inserted and matched with the filter hole (11).

2. A return fl ow preventing single flow valve device according to claim 1, characterized in that: The filter plate (10) is provided with a buffer ring (12) on one side, and the buffer ring (12) is close to the water inlet end of the shell (1).

3. A return flapper valve device according to claim 1, wherein: The valve rod (4) is fixedly provided with a round sleeve one (7) and a round sleeve two (8) at both ends.

4. A return flapper valve device according to claim 3, wherein: The round sleeve two (8) is provided with a limiting strip (9) on both sides, and the limiting strip (9) is slidably connected with the limiting groove (13) formed on the inner wall of the shell (1).

5. A return flapper valve device according to claim 4, wherein: A pair of elastic members (14) are connected between the limiting strip (9) and the limiting piece (3).

6. A return fluih preventing uniflow valve apparatus according to claim 1, wherein: The end of the taper sleeve (2) is provided with a sealing ring (15), and the size of the sealing ring (15) is matched with the size of the rear end of the valve core (5).

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