High pressure check valve detachable seat connection structure

Abstract

The utility model relates to check valve technical field, and disclose high pressure check valve detachable valve seat connecting structure, include: for abutting in the valve seat of valve body, the valve seat is rotationally arranged with the seat fastener for with valve body screw connection, the inside vertical of seat fastener is provided with pressure regulating part, and the bottom of pressure regulating part is provided with the valve clack for with the valve seat overlap. This high pressure check valve detachable valve seat connecting structure, through design one with its abutment valve seat in the valve body, make valve seat replace the structure in the valve body become the pad layer for medium, utilize seat fastener and the screw connection in the valve body to control the tightness of valve seat abutment, after medium flows through the valve seat and produces more serious wear to it, can through the fastener seat with valve seat from the valve body and detach, reach the effect of quick replacement valve seat, need not spend time and take down the valve body from high pressure pipeline.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically to a detachable valve seat connection structure for a high-pressure check valve. Background Technology

[0002] High-pressure check valves are crucial safety components in industrial pipeline systems. Their primary function is to ensure unidirectional flow of fluid media, preventing backflow that could cause equipment damage or safety accidents. They open automatically by relying on the force generated by the flow of the medium itself, and close automatically by relying on the weight of the valve disc, spring force, or reverse pressure of the medium when the flow of the medium stops or reverses. They are also known as non-return valves, one-way valves, backflow valves, and back pressure valves. Check valves are a type of automatic valve, and their operation depends entirely on the flow state of the medium in the pipeline.

[0003] After a check valve is installed on a high-pressure pipeline, it operates under high pressure. The fluid in the pipeline continuously impacts the valve disc. If the fluid carries small particles, these particles will collide with the sealing surfaces of the valve disc and seat as they pass through, inevitably causing scratches. This wears down the sealing surfaces of the valve disc and seat. In the current technology, once a check valve loses its sealing performance, it must be replaced entirely. This not only requires a long time to remove the check valve from the high-pressure pipeline, but also necessitates a pressure test after installing a new check valve, severely impacting the use of the high-pressure pipeline. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a detachable valve seat connection structure for high-pressure check valves, thus solving the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a detachable valve seat connection structure for a high-pressure check valve, comprising: a valve seat for abutting against the valve body, a fixed seat for threaded connection with the valve body being rotatably provided on the valve seat, a pressure regulating component being vertically provided inside the fixed seat, and a valve disc for overlapping with the valve seat being provided at the bottom of the pressure regulating component.

[0006] Preferably, the valve body includes a valve housing for installation on a high-pressure pipeline, the valve housing has an integrally formed partition, the inner wall of the valve housing near the top has an internal thread for mating with a fixed seat, and the top of the valve housing is fitted with a top cover connected to a pressure regulating component via a stuffing box.

[0007] Preferably, the partition layer is provided with a flow channel, the position of the flow channel corresponds to the position of the packing box on the top cover, the flow channel is opened outward along the edge near the top to form a stepped embedding groove, and the inner wall of the embedding groove is provided with a limiting groove.

[0008] Preferably, the valve seat includes a seat body for abutting against the valve body, and a first washer for contacting the valve body is sleeved on the seat body. A flow channel is opened in the middle of the seat body and passes through it. A sealing interface for valve disc abutting is formed at the top of the seat body along the edge of the flow channel. A limit block is integrally provided on the outer peripheral wall of the seat body. A guide rod is provided at the top of the seat body at the outer edge of the sealing interface. A positioning ring is provided at the top of the guide rod. A rotating rail for rotating with the fixed seat is provided on the outer peripheral wall of the positioning ring.

[0009] Preferably, the mounting member includes a threaded connector for being threaded into the valve body. The threaded connector is generally annular, and the inner wall of the threaded connector at the top opening has an inner corner groove for engaging with a wrench. The bottom of the threaded connector is provided with a rail sleeve for rotating with the valve seat.

[0010] Preferably, the valve disc includes a disc body for overlapping on the valve seat, and a second washer is provided at the overlap between the bottom of the disc body and the valve seat. A sliding column for sliding into the pressure regulating component is provided at the center of the top of the disc body, and a positioning seat is installed on the top of the sliding column after it has penetrated into the pressure regulating component. A spring for being positioned between the pressure regulating component and the disc body is sleeved on the sliding column.

[0011] Preferably, the pressure regulating component includes a valve stem for rotatably disposed in the stuffing box, the top of the valve stem passing through the valve body and forming a quadrangular prism for inserting a handle, the bottom of the valve stem being threaded with a pressure regulating sleeve, and the bottom of the pressure regulating sleeve being connected to a pressure guiding sleeve for being fitted onto the valve disc structure via a welded fixed connecting rod.

[0012] Preferably, the outer edge of the pressure guide sleeve is integrally provided with a sliding sleeve, and the sliding sleeve is slidably sleeved on the structure of the valve seat.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This high-pressure check valve features a detachable valve seat connection structure. By designing a valve seat within the valve body that abuts against it, the valve seat replaces the internal structure of the valve body as a pad for the medium to pass through. The tightness of the valve seat abutment is controlled by a threaded connection between a fixed part and the valve body. After the medium flows through the valve seat and causes significant wear, the valve seat can be removed from the valve body using a fixed part, achieving quick valve seat replacement without the need to spend time removing the valve body from the high-pressure pipeline. This also reduces the steps of pressure testing and minimizes the impact of valve seat replacement on the use of the high-pressure pipeline.

[0014] 2. This high-pressure check valve features a detachable valve seat connection structure. By incorporating a pressure regulating component, the valve disc's sealing pressure can be adaptively adjusted according to the pressure within the high-pressure pipeline and the media flow requirements during operation. This enhances the flexibility of the check valve in high-pressure pipeline applications, eliminating the need for additional customization based on media flow requirements and reducing the cost of practical check valves for high-pressure pipelines. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the cross-sectional structure of the valve shell of this utility model; Figure 4 This is a schematic diagram of the valve seat and valve disc separation structure of this utility model; Figure 5 This is a schematic diagram showing the disassembled structure of the fixing component and valve seat of this utility model; Figure 6 This is a schematic diagram of the disassembled structure of the valve disc and pressure regulating component of this utility model.

[0016] In the diagram: 1. Valve body; 11. Valve shell; 12. Partition; 13. Flow channel; 14. Seat groove; 15. Limiting groove; 16. Internal thread; 17. Top cover; 2. Valve seat; 21. Seat body; 22. Flow channel; 23. Sealing interface; 24. First washer; 25. Limiting block; 26. Guide rod; 27. Positioning ring; 3. Valve disc; 31. Disc body; 32. Sliding column; 33. Positioning seat; 34. Spring; 35. Second washer; 4. Fixed seat; 41. Threaded connection; 42. Internal corner groove; 5. Pressure adjusting component; 51. Valve stem; 52. Pressure adjusting sleeve; 53. Fixed connecting rod; 54. Pressure guiding sleeve; 55. Sliding sleeve; 56. Quadrilateral prism; 57. Handle; 6. Rail sleeve; 7. Rotary rail. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-6The high-pressure check valve has a detachable valve seat connection structure, including: a valve seat 2 for abutting against the valve body 1, a fixed seat 4 for threaded connection with the valve body 1 is rotatably provided on the valve seat 2, a pressure regulating component 5 is vertically provided inside the fixed seat 4, and a valve disc 3 for overlapping with the valve seat 2 is provided at the bottom of the pressure regulating component 5.

[0019] The valve body 1 includes a valve shell 11 for installation on a high-pressure pipeline. The valve shell 11 has an integrally formed partition 12 inside. The inner wall of the valve shell 11 near the top has an internal thread 16 for cooperating with the fixed seat 4. The top of the valve shell 11 is equipped with a top cover 17 connected to the pressure regulating component 5 through a stuffing box. The fixed seat 4 is installed in the valve body 1 through the internal thread 16, thereby stably fixing the valve seat 2 in the valve body 1. At the same time, the contact force of the valve seat 2 is controlled to the maximum extent to prevent fluid medium from seeping out of the valve seat 2 under high pressure.

[0020] The partition 12 has a flow channel 13, the position of which corresponds to the position of the packing box on the top cover 17. The flow channel 13 is opened outward along the edge near the top to form a stepped seat groove 14. The inner wall of the seat groove 14 has a limiting groove 15. The seat groove 14 provides a groove for the valve seat 2 to abut, improving the tightness of the valve seat 2 when abutting. At the same time, the limiting groove 15 is set to cooperate with the structure on the valve seat 2, so that the valve seat 2 will not rotate when it is pushed and abutted by the fixed part 4, thereby avoiding wear on the abutting part of the valve seat 2 and further ensuring the abutting effect of the valve seat 2.

[0021] The valve seat 2 includes a seat body 21 for abutting against the valve body 1, and a first washer 24 for contacting the valve body 1 is fitted on the seat body 21. A flow channel 22 is opened in the middle of the seat body 21, and a sealing interface 23 for the valve disc 3 to abut against is formed at the top of the seat body 21 along the edge of the flow channel 22. A limit block 25 is integrally provided on the outer peripheral wall of the seat body 21. A guide rod 26 is provided at the top of the seat body 21 at the outer edge of the sealing interface 23. A positioning ring 27 is provided at the top of the guide rod 26. A rotating rail 7 for rotating with the fixed seat 4 is provided on the outer peripheral wall of the positioning ring 27. By designing the structure of each part of the valve seat 2, the valve seat 2 becomes a detachable component for cooperating with the internal structure of the valve body 1. Therefore, when the valve seat 2 wears out after long-term use, it can be quickly replaced without disassembling the valve body 1, reducing the impact on the transmission of the flowing medium in the high-pressure pipeline.

[0022] The fixed seat 4 includes a threaded connector 41 for being threaded into the valve body 1. The threaded connector 41 is generally annular, and the inner wall of the threaded connector 41 at the top opening has an inner corner groove 42 for cooperating with a wrench. The bottom of the threaded connector 41 is provided with a rail sleeve 6 for rotating with the valve seat 2. By using the threaded connection between the threaded connector 41 and the valve body 1, after the valve seat 2 is fixed in the valve body 1, it can be integrated with the interior of the valve body 1 to form an integral unit, avoiding the valve seat 2 from shaking and edge leakage under high pressure impact, thus improving the stability of the valve seat 2.

[0023] The valve disc 3 includes a disc body 31 that overlaps with the valve seat 2. A second washer 35 is provided at the overlap between the bottom of the disc body 31 and the valve seat 2. A sliding column 32 is provided at the center of the top of the disc body 31 for sliding into the pressure regulating component 5. The top of the sliding column 32 is inserted into the pressure regulating component 5 and a positioning seat 33 is installed. A spring 34 is sleeved on the sliding column 32 for being positioned between the pressure regulating component 5 and the disc body 31. The sliding column 32 is inserted into the pressure regulating component 5 to guide the valve disc 3, so that the disc body 31 under the action of the spring 34 can only move along the sliding direction of the sliding column 32, thereby ensuring that the valve disc 3 smoothly abuts against the valve seat 2 and avoiding the situation where the edge is warped and the sealing surface is damaged.

[0024] The pressure regulating component 5 includes a valve stem 51 for rotating within the stuffing box. The top of the valve stem 51 passes through the valve body 1 and forms a quadrangular prism 56 for inserting a handle 57. A pressure regulating sleeve 52 is threaded onto the bottom of the valve stem 51. The bottom of the pressure regulating sleeve 52 is connected to a pressure guiding sleeve 54 fitted onto the valve disc 3 structure via a welded connecting rod 53. By threading the pressure regulating sleeve 52 onto the valve stem 51, the rotation of the valve stem 51 can adjust the position of the pressure regulating sleeve 52, thereby controlling the distance between the pressure regulating component 5 and the valve disc 3, achieving the effect of adjusting the sealing pressure of the valve disc 3. At the same time, the quadrangular prism 56 at the top of the valve stem 51 makes the handle 57 detachable. After the check pressure adjustment is completed, the handle 57 can be removed to avoid accidental activation.

[0025] The outer edge of the pressure guiding sleeve 54 is integrally provided with a sliding sleeve 55, which is slidably sleeved on the structure of the valve seat 2. By using the sliding sleeve 55 to slide and engage with the guide rod 26 on the valve seat 2, the rotation direction of the pressure guiding sleeve 54 is restricted, so that it can only move up and down under the rotation of the valve rod 51, thereby achieving the effect of regulating pressure.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable valve seat connection structure for a high-pressure check valve, characterized in that, include: A valve seat (2) is used to abut against the valve body (1). A fixed seat (4) is rotatably provided on the valve seat (2) for threaded connection with the valve body (1). A pressure regulating component (5) is vertically provided inside the fixed seat (4), and a valve disc (3) is provided at the bottom of the pressure regulating component (5) for overlapping with the valve seat (2).

2. The detachable valve seat connection structure for the high-pressure check valve according to claim 1, characterized in that, The valve body (1) includes a valve shell (11) for installation on a high-pressure pipeline. The valve shell (11) has an integrally formed partition (12) inside. The inner wall of the valve shell (11) near the top has an internal thread (16) for cooperating with the fixed part (4). The top of the valve shell (11) is equipped with a top cover (17) connected to the pressure regulating part (5) through a stuffing box.

3. The detachable valve seat connection structure for the high-pressure check valve according to claim 2, characterized in that, The partition (12) is provided with a flow channel (13), the position of the flow channel (13) corresponds to the position of the packing box on the top cover (17), the flow channel (13) is opened outward along the edge near the top to form a stepped embedding groove (14), and the inner wall of the embedding groove (14) is provided with a limiting groove (15).

4. The detachable valve seat connection structure for the high-pressure check valve according to claim 1, characterized in that, The valve seat (2) includes a seat (21) for abutting against the valve body (1), and a first gasket (24) for contacting the valve body (1) is sleeved on the seat (21). A flow channel (22) is opened in the middle of the seat (21) to pass through it. A sealing interface (23) for the valve disc (3) to abut is formed at the top of the seat (21) along the edge of the flow channel (22). A limit block (25) is integrally provided on the outer peripheral wall of the seat (21). A guide rod (26) is provided at the top of the seat (21) at the outer edge of the sealing interface (23). A positioning ring (27) is provided at the top of the guide rod (26). A rotating rail (7) for rotating with the fixed seat (4) is provided on the outer peripheral wall of the positioning ring (27).

5. The detachable valve seat connection structure for the high-pressure check valve according to claim 1, characterized in that, The fixed part (4) includes a threaded part (41) for being threaded in the valve body (1). The threaded part (41) is generally annular, and the inner wall of the threaded part (41) at the top opening has an inner corner groove (42) for cooperating with a wrench. The bottom of the threaded part (41) is provided with a rail sleeve (6) for rotating with the valve seat (2).

6. The detachable valve seat connection structure for the high-pressure check valve according to claim 1, characterized in that, The valve disc (3) includes a disc body (31) for overlapping on the valve seat (2), and a second washer (35) is provided at the overlap between the bottom of the disc body (31) and the valve seat (2). A sliding column (32) for sliding into the pressure regulating component (5) is provided at the center of the top of the disc body (31), and a positioning seat (33) is installed on the top of the sliding column (32) after it is inserted into the pressure regulating component (5). A spring (34) is sleeved on the sliding column (32) for being positioned between the pressure regulating component (5) and the disc body (31).

7. The detachable valve seat connection structure for the high-pressure check valve according to claim 1, characterized in that, The pressure regulating component (5) includes a valve stem (51) for rotating and disposed in the stuffing box. The top of the valve stem (51) passes through the valve body (1) and forms a quadrangular prism (56) for inserting a handle (57). The bottom of the valve stem (51) is threaded with a pressure regulating sleeve (52). The bottom of the pressure regulating sleeve (52) is connected to a pressure guiding sleeve (54) for being fitted onto the structure of the valve disc (3) by a welded fixed connecting rod (53).

8. The detachable valve seat connection structure for the high-pressure check valve according to claim 7, characterized in that, The outer edge of the pressure guide sleeve (54) is integrally provided with a sliding sleeve (55), and the sliding sleeve (55) is slidably sleeved on the structure of the valve seat (2).

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