Integrated self-filtering check butterfly valve

Abstract

The utility model relates to the technical field of valves, in particular to an integrated self-filtering check butterfly valve which comprises a valve body, the valve body is of an integrated casting structure, a flow channel is arranged in the valve body, the left side of the valve body is provided with an inlet end, the right side of the valve body is provided with an outlet end, and the inlet end, the flow channel and the outlet end are communicated. A filter assembly, a check valve assembly and a butterfly valve assembly are sequentially arranged in the flow channel.

Description

Technical Field

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

[0002] In industrial and civil piping systems, butterfly valves, check valves, and Y-type filters are three commonly used valves. Butterfly valves are characterized by reliable sealing, suitability for high-temperature and high-pressure conditions, and bidirectional sealing; check valves feature unidirectional flow and low flow resistance; and Y-type filters offer low flow resistance, a large flow area, and easy cleaning. However, in practical applications, these three types of valves often need to be installed in series in the piping system to meet the requirements of media control, including filtering impurities, unidirectional flow, and shut-off. This installation method not only occupies a large space, increasing installation difficulty and cost, but also makes it difficult to meet user needs in some space-constrained locations, such as inside ships and spacecraft. 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 self-filtering check butterfly valve, which integrates the functions of Y-type filter, check valve and butterfly valve into one, and has the advantages of reliable sealing, automatic filtration of impurities, light weight and few leakage points.

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

[0005] An integrated self-filtering check butterfly valve includes a valve body, which is a one-piece cast structure. The valve body has a flow channel, with an inlet on the left side and an outlet on the right side. The inlet, flow channel, and outlet are connected. A filter assembly is located within the flow channel on one side of the inlet. The filter assembly includes a Y-shaped filter screen and a removable valve cover. The Y-shaped filter screen is sealed and embedded inside the valve body and arranged at an angle to the axis of the flow channel. The valve cover is located below the angled end of the Y-shaped filter screen. An O-ring seal is provided between the valve cover and the valve body. The Y-shaped filter screen is fixed to the valve body with bolts. A check valve assembly is provided on the right side of the flow channel. The check valve assembly includes a check valve core hinged in the flow channel. The sealing surface of the check valve core is covered with a rubber layer. The check valve core forms a line contact seal with the inner wall of the flow channel and is pushed open by the medium pressure or by self-repositioning. A butterfly valve assembly is also provided on the right side of the check valve core in the flow channel. The butterfly valve assembly includes a disc and a valve stem fixedly connected above the disc. Sealing packing is filled between the valve stem and the valve body. The top of the valve stem extends to the outside of the valve body and is connected to an external drive mechanism.

[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 Y-type filter screen, it can filter impurities in the medium. The filtered medium will contact the check valve core through the flow channel. At this time, the pressure of the medium pushes open the check valve core and flows into the disc. After the medium pushes open the check valve core, the check valve core will automatically reset to prevent the medium from flowing back. At the same time, the rubber layer on the sealing surface of the check valve core is in sealing contact with the flow channel, which also plays the role of sealing and preventing backflow. Finally, the valve stem is driven by the external drive mechanism to drive the disc to open and close 90°. At this time, the medium flows smoothly out of the outlet end through the flow channel, thus realizing the integrated design of filtration, protection check valve and butterfly valve, reducing leakage points and ensuring reliable sealing.

[0007] Further feature: The filter screen can be pulled out axially for cleaning.

[0008] By adopting the above technical solution, after the Y-type filter screen has been used for a period of time, the valve cover can be removed to take out the Y-type filter screen for cleaning or replacement, thereby improving the utilization rate.

[0009] Further configuration: A counterweight is provided on the side of the check valve core near the disc.

[0010] By adopting the above technical solution, the medium pressure pushes open the valve core to achieve unidirectional flow. When there is no medium flow, the valve core closes automatically by its own weight or counterweight.

[0011] Further feature: The surface of the check valve core is coated with an anti-corrosion coating.

[0012] By adopting the above technical solution, and by coating the surface of the check valve core with an anti-corrosion coating, corrosion resistance can be achieved, thereby improving the service life of the check valve core.

[0013] Further configuration: Both the inlet and outlet ends are equipped with flange interfaces.

[0014] By adopting the above technical solution and through the design of the flange interface, it is possible to achieve compatibility with existing pipeline systems.

[0015] In summary, this utility model has the following beneficial effects:

[0016] This utility model reduces the installation length compared to traditional split valves (Y-type filter + check valve + butterfly valve + two sets of flanges) through an integrated cast valve body design. It also eliminates the need for intermediate connecting flanges and seals, resulting in a reduction in overall weight. It is particularly suitable for space-constrained scenarios such as ships and aviation.

[0017] The inclined Y-type filter screen can be pulled out axially without disassembling the entire valve, thus shortening maintenance time and improving work efficiency.

[0018] The pre-filter protects the sealing surfaces of the check valve and butterfly valve, extending the service life of critical components. 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. Y-type filter screen; 7. Valve cover; 8. O-ring seal; 9. Check valve assembly; 10. Check valve core; 11. Rubber layer; 12. Butterfly valve assembly; 13. Disc; 14. Valve stem; 15. Sealing packing; 16. Counterweight; 17. Flange interface. 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 self-filtering check valve, such as Figure 1 , 2 As shown, the valve body is a one-piece cast structure with a flow channel inside. The left side of the valve body is the inlet end, and the right side is the outlet end. The inlet end, the flow channel, and the outlet end are connected. A filter assembly is located in the flow channel on one side of the inlet end. The filter assembly includes a Y-type filter screen and a detachable valve cover. The Y-type filter screen is sealed and embedded inside the valve body and is arranged at an angle to the axis of the flow channel. The valve cover is located below the inclined end of the Y-type filter screen. An O-ring is provided between the valve cover and the valve body. The valve cover is fixed to the valve body by bolts.

[0026] The right side of the Y-type filter screen is equipped with a check valve assembly located in the flow channel. The check valve assembly includes a check valve core hinged in the flow channel. The sealing surface of the check valve core is covered with a rubber layer. The check valve core forms a line contact seal with the inner wall of the flow channel and is pushed open by the medium pressure or by self-repositioning.

[0027] A butterfly valve assembly is also provided on the right side of the check valve core within the flow channel. The butterfly valve assembly includes a disc and a valve stem fixedly connected above the disc. Sealing packing is filled between the valve stem and the valve body. The top of the valve stem extends to the outside of the valve body and is connected to an external drive mechanism.

[0028] like Figure 1 As shown, the filter screen can be pulled out along the axial direction for cleaning.

[0029] like Figure 1 As shown, a counterweight is provided on the side of the check valve core near the disc, and the surface of the check valve core is coated with an anti-corrosion coating.

[0030] like Figure 2 As shown, both the inlet and outlet ends are equipped with flange interfaces.

[0031] In this embodiment of the invention, 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 Y-type filter screen, it can filter impurities in the medium. The filtered medium will contact the check valve core through the flow channel. At this time, the pressure of the medium pushes open the check valve core and flows into the disc. After the medium pushes open the check valve core, the check valve core will automatically reset to prevent the medium from flowing back. At the same time, the rubber layer on the sealing surface of the check valve core is in sealing contact with the flow channel, which also plays the role of sealing and preventing backflow. Finally, the valve stem is driven by the external drive mechanism to drive the disc to open and close 90°. At this time, the medium flows smoothly out of the outlet end through the flow channel, thus realizing the integrated design of filtration, protection check valve and butterfly valve, reducing leakage points and ensuring reliable sealing.

[0032] 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 self-filtering check butterfly valve comprising a valve body, characterized in that: The valve body is an integral casting structure, the valve body is provided with a flow channel, the left side of the valve body is provided with an inlet end, the right side of the valve body is provided with an outlet end, the inlet end, the flow channel and the outlet end are communicated, the inlet end is provided with a filter assembly in the flow channel, the filter assembly comprises a Y-shaped filter screen and a detachable valve cover, the Y-shaped filter screen is sealingly embedded in the valve body and is arranged in an inclined manner with the axis of the flow channel, the valve cover is arranged below the inclined end of the Y-shaped filter screen, an O-shaped sealing ring is arranged between the valve cover and the valve body, the valve cover is fixed to the valve body by bolts, a check valve assembly is arranged on the right side of the Y-shaped filter screen in the flow channel, the check valve assembly comprises a check valve core hinged in the flow channel, the sealing surface of the check valve core is covered with a rubber layer, the check valve core forms a line contact seal with the inner wall of the flow channel and is pushed away by the medium pressure or is reset by gravity, a butterfly valve assembly is further arranged on the right side of the check valve core in the flow channel, the butterfly valve assembly comprises a disc plate and a valve rod fixedly connected above the disc plate, sealing packing is filled between the valve rod and the valve body, and an external driving mechanism is connected to the top of the valve rod extending to the outside of the valve body.

2. The one-piece self-filtering check butterfly valve according to claim 1, characterized in that: The filter screen can be pulled out axially for cleaning.

3. The integrated self-filtering check butterfly valve according to claim 1, wherein: The check valve core is provided with a counterweight on the side close to the disc plate.

4. The integrated self-filtering check butterfly valve according to claim 1, wherein: The surface of the check valve core is coated with a corrosion-resistant coating.

5. The integrated self-filtering check butterfly valve according to claim 1, wherein: The inlet end and the outlet end are both provided with a flange interface.

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