An adjustable swing check valve
By adjusting the valve disc opening angle and height of the swing check valve through the limit rod and screw structure, the adaptability problem of the fixed stroke check valve under different working conditions is solved, achieving efficient media transportation and reducing leakage, thereby improving the reliability and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI BAIHU VALVE FACTORY
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-14
AI Technical Summary
The existing swing check valves have a fixed valve disc stroke, which makes it difficult to adapt to changes in operating conditions under different pressure conditions. This leads to problems such as leakage in media transportation, improper closing speed, or jamming, increasing maintenance costs and downtime.
An adjustable swing check valve was designed, which adjusts the opening angle and installation height of the valve disc through a limit rod and screw structure to adapt to different working conditions, including adaptive adjustment for high flow rates and particulate media.
This achieves high adaptability of the check valve under different operating conditions, reduces media leakage, extends valve life, and lowers maintenance costs.
Smart Images
Figure CN224497570U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of check valve technology, and in particular to an adjustable swing check valve. Background Technology
[0002] Swing check valves open by rotating the valve disc around the hinge axis due to the thrust of the medium flow. When the medium flows backward, it closes by its own weight or the pressure of the medium. They are widely used to prevent backflow of medium in pipelines. They have a simple structure, strong flow capacity, and are suitable for medium and low pressure and large diameter pipelines.
[0003] Most current check valves have a fixed valve disc stroke, making them difficult to adapt to complex operating conditions. With a fixed stroke, if designed for high pressure, low-pressure media may not be able to push the valve disc open; if optimized for low pressure, high pressure may lead to frequent opening and closing due to impact. In liquid systems, a fixed stroke often results in water hammer due to excessively fast closing speed, or leakage due to excessively slow closing speed; in media containing particles, the fixed gap is prone to blockage, and the wear of the sealing surface cannot be compensated, requiring complete replacement, increasing maintenance costs and downtime.
[0004] Based on this, an adjustable swing check valve is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide an adjustable swing check valve in order to solve the above-mentioned problems.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An adjustable swing check valve includes a valve body, a connecting pipe connected to the valve body, a limit ring connected inside the connecting pipe, a connecting post above the limit ring, a connecting frame rotatably connected to the connecting post, a valve disc connected to one side of the connecting frame, and an adjustment mechanism for adjusting the rotational buffer stroke of the valve disc connected to the connecting post.
[0008] Preferably, an extrusion column is provided above the connecting column, and a sealing cap is connected to the upper end of the extrusion column. The sealing cap is connected to the connecting pipe by bolts.
[0009] Preferably, the adjusting mechanism includes a limiting rod, a hexagonal groove is provided on the connecting column, the limiting rod is connected through the connecting column, and the upper end of the limiting rod is disposed in the hexagonal groove.
[0010] Preferably, the hexagonal groove is located at the center of the upper end of the connecting post.
[0011] Preferably, the connecting column has a hexagonal groove 2 and a connecting groove, the connecting groove and the hexagonal groove 2 are interconnected, a hinge frame is connected to the connecting groove, the hinge frame is rotatably connected to one end of the connecting frame, a screw is threaded to the upper end of the hinge frame, the screw is connected through the connecting column, and the upper end of the screw is set on the hexagonal groove 2.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0013] 1. This application adopts a limit rod structure to limit the opening angle of the valve disc. The opening angle of the valve disc can be adjusted by replacing the limit rod with one of different lengths, so that the check valve can be adapted to different application environments.
[0014] 2. This application adopts a screw structure, which allows for adjustment of the valve disc's installation height, thereby enabling the valve disc to mate with the pipe end housing of the valve body, preventing media leakage and improving the operational reliability of the check valve. Attached Figure Description
[0015] Figure 1 A schematic diagram of the overall structure of the check valve according to an embodiment of the present invention is shown;
[0016] Figure 2 A schematic diagram of a partial cross-section of a check valve according to an embodiment of the present invention is shown;
[0017] Figure 3 An exploded structural diagram of the articulated frame connection provided according to an embodiment of the present invention is shown.
[0018] Legend:
[0019] 1. Valve body; 2. Connecting pipe; 3. Sealing cap; 4. Extrusion column; 5. Limiting ring; 6. Connecting column; 7. Valve disc; 8. Connecting frame; 9. Hinge frame; 10. Limiting rod; 11. Connecting groove; 12. Hexagonal groove one; 13. Hexagonal groove two; 14. Screw. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figures 1-3 This utility model provides a technical solution:
[0022] An adjustable swing check valve includes a valve body 1, a connecting pipe 2 connected to the valve body 1, the connecting pipe 2 being vertically connected to the valve body 1, a limit ring 5 connected inside the connecting pipe 2, a connecting post 6 disposed above the limit ring 5, the connecting post 6 abutting against the upper surface of the limit ring 5, a connecting frame 8 rotatably connected to the connecting post 6, a valve disc 7 connected to one side of the connecting frame 8, the connection structure between the valve disc 7 and the connecting frame 8 being a direct reference to the prior art, and an adjustment mechanism connected to the connecting post 6 for adjusting the rotational buffer stroke of the valve disc 7, this adjustment structure enabling the check valve to adapt to various transportation needs.
[0023] Specifically, such as Figure 2 As shown, a compression column 4 is provided above the connecting column 6, and a sealing cap 3 is connected to the upper end of the compression column 4. The sealing cap 3 is connected to the connecting pipe 2 by bolts, and the sealing cap 3 ensures the stability of the valve disc 7 connection.
[0024] Specifically, such as Figure 2 and Figure 3 As shown, the adjustment mechanism includes a limiting rod 10. When the valve disc 7 deflects, its structure can contact the limiting rod 10, thereby limiting the opening angle of the valve disc 7 by using the limiting rod 10. A hexagonal groove 12 is provided on the connecting column 6, and the limiting rod 10 is connected through the connecting column 6. The upper end of the limiting rod 10 is set in the hexagonal groove 12.
[0025] Specifically, such as Figure 3 As shown, hexagonal groove 12 is located at the center of the upper end of connecting column 6, and the upper end of the limiting rod 10 connected to hexagonal groove 12 abuts against the extrusion column 4, using the extrusion column 4 to limit the screw 14 and the limiting rod 10.
[0026] Specifically, such as Figure 2 and Figure 3 As shown, the connecting column 6 has a hexagonal groove 13 and a connecting groove 11. The connecting groove 11 and the hexagonal groove 13 are interconnected. A hinge frame 9 is connected to the connecting groove 11. The hinge frame 9 is rotatably connected to one end of the connecting frame 8. A screw 14 is threadedly connected to the upper end of the hinge frame 9. The screw 14 is connected through the connecting column 6. The upper end of the screw 14 is set on the hexagonal groove 13.
[0027] In summary, the adjustable swing check valve provided in this embodiment allows the hinge bracket 9 to be inserted into the connecting groove 11 during valve disc 7 installation, so that the upper end of the screw 14 is away from the hexagonal groove 13. At this time, the position of the hinge bracket 9 connected to the screw 14 can be changed by rotating the screw 14. After adjustment, the upper end of the screw 14 is put back into the hexagonal groove 13. At this time, observe whether the valve disc 7 is connected to the pipe port in the valve body 1.
[0028] When it is necessary to adjust the opening angle of valve disc 7, the maximum opening angle of valve disc 7 can be limited by assembling different limit rods 10. Then, the extrusion column 4 is assembled into the connecting column 6, and the extrusion column 4 and the limit ring 5 are used to extrude and position the connecting column 6. Then, the sealing cover 3 is connected to the connecting pipe 2.
[0029] The limit rod 10 enables the check valve to adapt to different flow requirements. The large-angle opening meets high flow conditions and reduces flow resistance. The small-angle limit avoids slow reset or vibration caused by excessive rotation of the valve disc 7 under low pressure. At the same time, the angle can be adjusted to a smaller angle for media containing particles to prevent impurities from getting stuck, extend valve life, and improve adaptability to complex working conditions.
[0030] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An adjustable swing check valve, comprising a valve body (1), characterized in that, A connecting pipe (2) is connected to the valve body (1). A limit ring (5) is connected inside the connecting pipe (2). A connecting column (6) is provided above the limit ring (5). A connecting frame (8) is rotatably connected to the connecting column (6). A valve disc (7) is connected to one side of the connecting frame (8). An adjustment mechanism for adjusting the rotation buffer stroke of the valve disc (7) is connected to the connecting column (6).
2. The adjustable swing check valve according to claim 1, characterized in that, An extrusion column (4) is provided above the connecting column (6), and a sealing cap (3) is connected to the upper end of the extrusion column (4). The sealing cap (3) is connected to the connecting pipe (2) by bolts.
3. The adjustable swing check valve according to claim 1, characterized in that, The adjustment mechanism includes a limiting rod (10), and a hexagonal groove (12) is provided on the connecting column (6). The limiting rod (10) is connected through the connecting column (6), and the upper end of the limiting rod (10) is set in the hexagonal groove (12).
4. An adjustable swing check valve according to claim 3, characterized in that, The hexagonal groove (12) is located at the center of the upper end of the connecting column (6).
5. An adjustable swing check valve according to claim 1, characterized in that, The connecting column (6) is provided with a hexagonal groove 2 (13) and a connecting groove (11). The connecting groove (11) and the hexagonal groove 2 (13) are interconnected. A hinge frame (9) is connected to the connecting groove (11). The hinge frame (9) is rotatably connected to one end of the connecting frame (8). A screw (14) is threadedly connected to the upper end of the hinge frame (9). The screw (14) is connected through the connecting column (6). The upper end of the screw (14) is set on the hexagonal groove 2 (13).