Integrated filtering check gate valve

Abstract

The utility model relates to the technical field of valves, in particular to an integrated filtering check gate valve which comprises a valve body, the valve body is of an integrated casting structure, a flow channel is formed in the valve body, an inlet end is arranged on the left side of the valve body, an outlet end is arranged on the right side of the valve body, the inlet end is communicated with the flow channel and the outlet end, and a filtering assembly is arranged on one side of the inlet end and located in the flow channel. The filter assembly comprises a double-layer cylindrical filter screen and a detachable lower valve cover, the double-layer cylindrical filter screen is embedded into the valve body in a sealed mode and is inclined relative to the axis of the flow channel, the lower valve cover is arranged below the inclined end of the double-layer cylindrical filter screen, an O-shaped sealing ring is arranged between the lower valve cover and the valve body, and the lower valve cover is fixed to the valve body through a bolt. A check valve assembly is arranged on the right side of the double-layer cylindrical filter screen and located in the flow channel, and a gate valve assembly is arranged on the right side of the check valve assembly and located in the flow channel.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to an integrated filter check valve. Background Technology

[0002] In traditional piping systems, filters, check valves, and gate valves typically require separate installation and flange connections, resulting in large overall size, increased weight, numerous leakage points, and complex installation. While some combined valves exist in existing technologies, most fail to simultaneously address the issues of sealing reliability, structural compactness, and functional integration. Therefore, there is an urgent need for a valve that integrates all three functions, reduces leakage points, and is easy to install. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide an integrated filter check valve, which has the advantage of integrating the filter, check valve and gate valve into a single valve body, thus solving the problems of large installation space and many leakage points in the prior art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] An integrated filter check gate valve includes a valve body, which is a one-piece cast structure. A flow channel is opened within the valve body. The left side of the valve body is designated as the inlet end, and the right side as the outlet end. The inlet end is connected to the flow channel and the outlet end. A filter assembly is located within the flow channel on one side of the inlet end. The filter assembly includes a double-layer cylindrical filter screen and a detachable lower valve cover. The double-layer cylindrical filter screen is sealed and embedded inside the valve body and arranged at an angle to the axis of the flow channel. The lower valve cover is located below the angled end of the double-layer cylindrical filter screen. An O-ring is provided between the lower valve cover and the valve body. The lower valve cover is fixed to the valve body by bolts. A check valve assembly is located within the flow channel on the right side of the double-layer cylindrical filter screen, and a gate valve assembly is located within the flow channel on the right side of the check valve assembly.

[0006] By adopting the above technical solution, during operation, the medium flows into the flow channel from the inlet end on the left side of the valve body. When the medium passes through the double-layer cylindrical filter screen, impurities in the medium are filtered out. The filtered medium then contacts the check valve assembly through the flow channel. At this time, the pressure of the medium pushes open the check valve assembly and flows into the gate valve assembly. After the medium pushes open the check valve core, the cooperation of the check valve assembly prevents backflow of the medium. Finally, it cooperates to open the gate valve assembly, at which point the medium flows smoothly out of the outlet end through the flow channel. This achieves an integrated design that combines filtration, check valve protection, and gate valve, reducing leakage points and ensuring reliable sealing.

[0007] Further configuration: The check valve assembly includes a check valve core hinged within the flow channel, the surface of the check valve core is coated with an anti-rust coating, a sealing strip is attached to the surface of the check valve core, and a counterweight is adhered to the back of the check valve core.

[0008] By adopting the above technical solution, the filtered medium will contact the check valve core through the flow channel. At this time, the pressure of the medium pushes the check valve core open and flows into the gate valve assembly. After the medium pushes the check valve core open, the check valve core will automatically reset by the counterweight to prevent the medium from flowing back. At the same time, the sealing strip on the check valve core is in sealing contact with the flow channel, which also plays the role of sealing and preventing backflow.

[0009] Further details: The double-layer cylindrical filter screen is made of stainless steel, and the mesh size of the double-layer cylindrical filter screen is uniform.

[0010] By adopting the above technical solution, the double-layer filter screen made of stainless steel and the uniform mesh design can effectively filter impurities.

[0011] Further configuration: The gate valve assembly includes an upper valve cover, which is fixedly connected to the upper part of the valve body by a connecting screw. A sealed chamber is formed between the upper valve cover and the valve body. A valve stem is threadedly connected to the top of the upper valve cover. The top of the valve stem extends to the outside of the upper valve cover. A handwheel is connected to the extended end of the valve stem. A wedge gate is connected to the bottom of the valve stem extending into the flow channel. The wedge gate matches the sealing surface of the flow channel.

[0012] By adopting the above technical solution, when the medium passes through the wedge gate, the operator turns the handwheel forward or backward according to the operation requirements, which drives the valve stem and the wedge gate at the bottom of the valve stem to rotate, thereby realizing the wedge gate to fit into or move away from the flow channel, thus realizing the opening and closing of the medium in the flow channel.

[0013] Further configuration: Symmetrical auxiliary filters are provided on both sides of the gate within the flow channel.

[0014] By adopting the above technical solution, when the medium in the flow channel enters the outlet end, the filtration area of ​​the medium can be increased again through the design of the auxiliary filter screen.

[0015] Further feature: The outer side of the valve body is coated with an anti-corrosion coating.

[0016] By adopting the above technical solution and setting the anti-corrosion coating, the outer side of the valve body can be protected, thereby improving the service life of the valve body.

[0017] In summary, this utility model has the following beneficial effects:

[0018] This utility model provides an integrated filter check gate valve that achieves three core advantages through innovative structural design: First, the integrated cast valve body combines filtration, check, and gate valve functions, reducing installation space and leakage points compared to traditional split valves, significantly improving sealing reliability; second, the modular design of the detachable filter assembly, combined with a dual filtration system (an inclined double-layer stainless steel main filter + auxiliary filters on both sides of the gate), improves maintenance efficiency; finally, the optimized fluid control structure (counterweight check valve + wedge gate hard seal) combined with anti-corrosion treatment reduces leakage rate under operating pressure, making it particularly suitable for harsh conditions such as shipbuilding and chemical industries. This design achieves breakthrough improvements in space utilization, sealing performance, and ease of maintenance through structural simplification and functional integration. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0022] In the diagram, 1. Valve body; 2. Flow channel; 3. Inlet end; 4. Outlet end; 5. Filter assembly; 6. Double-layer cylindrical filter screen; 7. Lower valve cover; 8. O-ring seal; 9. Check valve assembly; 10. Gate valve assembly; 11. Check valve core; 12. Anti-rust coating; 13. Sealing strip; 14. Counterweight; 15. Upper valve cover; 16. Sealing chamber; 17. Valve stem; 18. Handwheel; 19. Wedge gate; 20. Auxiliary filter screen; 21. Anti-corrosion coating. Detailed Implementation

[0023] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figure 1 To be continued Figure 2 The detailed description of the embodiments will make this clear. All structural details mentioned in the following embodiments are based on the accompanying drawings.

[0024] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0025] Example 1: An integrated filter check valve, such as Figure 1 , 2As shown, the valve body 1 is an integrally cast structure. The outer side of the valve body 1 is coated with an anti-corrosion coating 21. A flow channel 2 is opened inside the valve body 1. The left side of the valve body 1 is set as the inlet end 3, and the right side of the valve body 1 is set as the outlet end 4. The inlet end 3 is connected to the flow channel 2 and the outlet end 4. A filter assembly 5 is set on one side of the inlet end 3 inside the flow channel 2. The filter assembly 5 includes a double-layer cylindrical filter screen 6 and a detachable lower valve cover 7. The double-layer cylindrical filter screen 6 is sealed and embedded inside the valve body 1 and is arranged at an angle to the axis of the flow channel 2. The double-layer cylindrical filter screen 6 is made of stainless steel and has a uniform mesh density. The lower valve cover 7 is set below the inclined end of the double-layer cylindrical filter screen 6. An O-ring seal 8 is provided between the lower valve cover 7 and the valve body 1. The lower valve cover 7 is fixed to the valve body 1 by bolts.

[0026] like Figure 1 As shown, a check valve assembly 9 is provided on the right side of the double-layer cylindrical filter screen 6 in the flow channel 2. The check valve assembly 9 includes a check valve core 11 hinged in the flow channel 2. The surface of the check valve core 11 is coated with an anti-rust coating 12. A sealing strip 13 is attached to the surface of the check valve core 11. A counterweight 14 is attached to the back of the check valve core 11.

[0027] like Figure 1 , 2 As shown, a gate valve assembly 10 is provided on the right side of the check valve assembly 9 within the flow channel 2. The gate valve assembly 10 includes an upper valve cover 15, which is fixedly connected to the valve body 1 via a connecting screw. A sealing chamber 16 is formed between the upper valve cover 15 and the valve body 1. A valve stem 17 is threadedly connected to the top of the upper valve cover 15. The top of the valve stem 17 extends to the outside of the upper valve cover 15, and a handwheel 18 is connected to the extended end of the valve stem 17. A wedge gate 19 is connected to the bottom of the valve stem 17 within the flow channel 2. The wedge gate 19 matches the sealing surface of the flow channel 2.

[0028] like Figure 2 As shown, symmetrical auxiliary filter screens 20 are provided on both sides of the gate in the flow channel 2.

[0029] In this embodiment of the invention, during operation, the medium flows into the flow channel 2 from the left inlet end 3 of the valve body 1. When the medium passes through the double-layer cylindrical filter screen 6, it can filter impurities in the medium. The filtered medium will contact the check valve core 11 through the flow channel 2. At this time, the pressure of the medium pushes open the check valve core 11 and flows into the gate valve assembly 10. After the medium pushes open the check valve core 11, the check valve core 11 will automatically reset by the counterweight 14 to prevent the medium from flowing back. At the same time, the sealing strip 13 on the check valve core 11 seals with the flow channel 2, which also plays the role of sealing and preventing backflow. When passing through the wedge gate 19, the operator turns the handwheel 18 forward or backward according to the operation requirements, which drives the valve stem 17 and the wedge gate 19 at the bottom of the valve stem 17 to rotate, so as to make the wedge gate 19 fit into or move away from the flow channel 2, thereby controlling the opening and closing of the medium in the flow channel 2. When the medium in the flow channel 2 enters the outlet end 4, the auxiliary filter screen 20 is designed to further increase the filtration area of ​​the medium. The integrated cast valve body 1 integrates filtration, check valve and gate valve functions, which reduces installation space and leakage points compared with traditional split valves, and significantly improves sealing reliability.

[0030] The above description is a further detailed explanation of the present utility model in conjunction with specific embodiments, and it should not be considered that the specific implementation of the present utility model is limited to this. For those skilled in the art to which the present utility model pertains and related fields, any extensions, operation methods, and data substitutions made based on the technical solution concept of the present utility model should fall within the protection scope of the present utility model.

Claims

1. An integrated filter check valve, comprising a valve body (1), characterized in that: The valve body (1) is an integrally cast structure. A flow channel (2) is opened inside the valve body (1). The left side of the valve body (1) is set as the inlet end (3), and the right side of the valve body (1) is set as the outlet end (4). The inlet end (3) is connected to the flow channel (2) and the outlet end (4). A filter assembly (5) is provided on one side of the inlet end (3) inside the flow channel (2). The filter assembly (5) includes a double-layer cylindrical filter screen (6) and a detachable lower valve cover (7). The double-layer cylindrical filter screen (6) 6) The seal is embedded inside the valve body (1) and is arranged at an angle to the axis of the flow channel (2). The lower valve cover (7) is located below the inclined end of the double-layer cylindrical filter screen (6). An O-ring (8) is provided between the lower valve cover (7) and the valve body (1). The lower valve cover (7) is fixed to the valve body (1) by bolts. A check valve assembly (9) is provided on the right side of the double-layer cylindrical filter screen (6) in the flow channel (2). A gate valve assembly (10) is provided on the right side of the check valve assembly (9) in the flow channel (2).

2. The integrated filter check valve according to claim 1, characterized in that: The check valve assembly (9) includes a check valve core (11) hinged in the flow channel (2), the surface of the check valve core (11) is coated with an anti-rust coating (12), a sealing strip (13) is attached to the surface of the check valve core (11), and a counterweight (14) is attached to the back of the check valve core (11).

3. The integrated filter check valve according to claim 1, characterized in that: The double-layer cylindrical filter screen (6) is made of stainless steel and has a uniform mesh size.

4. The integrated filter check valve according to claim 1, characterized in that: The gate valve assembly (10) includes an upper valve cover (15), which is fixedly connected to the valve body (1) above by a connecting screw. A sealed chamber (16) is formed between the upper valve cover (15) and the valve body (1). A valve stem (17) is threadedly connected to the top of the upper valve cover (15). The top of the valve stem (17) extends to the outside of the upper valve cover (15). A handwheel (18) is connected to the extended end of the valve stem (17). A wedge gate (19) is connected to the bottom of the valve stem (17) extending into the flow channel (2). The wedge gate (19) matches the sealing surface of the flow channel (2).

5. The integrated filter check valve according to claim 1, characterized in that: The flow channel (2) is provided with symmetrical auxiliary filter screens (20) on both sides of the gate.

6. The integrated filter check valve according to claim 1, characterized in that: The valve body (1) is coated with an anti-corrosion coating (21) on the outside.

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