Sliding block assembly and switching valve

Abstract

A sliding block assembly and a switching valve. The sliding block assembly comprises a sliding block main body (1) and an inner housing (2). An inner chamber (11) is formed in the sliding block main body (1). The inner housing (2) is located in the inner chamber (11). The outer surface of the inner housing (2) and the chamber wall of the inner chamber (11) enclose an outer flow path (2). The inner surface of the inner housing (2) encloses an inner flow path (22). The inner housing (2) is welded to the chamber wall of the inner chamber (11).

Description

Slider assembly and switching valve

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202323290508.3, filed on December 4, 2023, entitled “A Slider Assembly and Switching Valve,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of switching valves, and more particularly to a slider assembly and a switching valve. Background Art

[0004] The switching valve comprises a valve body and a slider assembly. The valve body is connected to multiple pipes, and the slider assembly is slidably mounted within the valve body. The slider assembly defines an inner cavity. As the slider assembly slides within the valve body, the different pipes are connected through the inner cavity, thereby achieving switching of the switching valve.

[0005] Some slider assemblies also include an inner shell, which divides the inner cavity of the slider assembly into two flow channels, thereby preventing turbulence when the fluid flows in the inner cavity. Existing slider assemblies equipped with an inner shell typically snap the inner shell onto the slider assembly. On the one hand, the inner shell and the slider assembly need to be separately machined to form snap-fit ​​structures, which complicates the processing of the inner shell and the slider assembly and increases production costs. On the other hand, the inner shell is not securely installed and will shake and generate noise when impacted by the fluid. There is also a risk that the inner shell will fall off the slider assembly. Summary of the Invention

[0006] According to various embodiments of the present application, a slider assembly and a switching valve are provided.

[0007] The present application provides the following technical solution: a slider assembly, comprising a slider body and an inner shell, wherein an inner cavity is formed in the slider body, the inner shell is located in the inner cavity, an outer flow channel is formed between the outer surface of the inner shell and the cavity wall of the inner cavity, an inner flow channel is formed on the inner surface of the inner shell, and the inner shell is welded to the cavity wall of the inner cavity.

[0008] In some embodiments, the inner shell is provided with two welding portions, one on each side of the inner shell, so that both sides of the inner shell are welded to the slider body, making the connection more stable.

[0009] In some embodiments, the inner shell is provided with a notch located at the opening of the inner shell, and the notch forms the welding portion. This simplifies the processing of the welding portion, and the provision of the notch for welding can prevent solder from flowing onto the first end surface of the slider body and affecting the seal between the slider body and the valve seat.

[0010] In some embodiments, the notch includes a straight line segment, so that the welder can weld along the straight line segment, making the welding operation more convenient.

[0011] In some embodiments, the slider body has a first end surface, the inner shell has a second end surface, the second end surface is located within the inner cavity, and the distance between the first end surface and the second end surface is A, where 0.1 mm ≤ A ≤ 1 mm. Thus, the distance A provides a wear margin for the first end surface of the slider body.

[0012] In some embodiments, the slider body has a first end surface, the straight line segment is parallel to the first end surface, and the spacing between the straight line segment and the first end surface is B, where 1.5 mm ≤ B ≤ 8 mm. It can be understood that the spacing B ensures a sufficient distance between the welding position and the first end surface, preventing welding from affecting the flatness of the first end surface.

[0013] In some embodiments, the slider assembly further includes a support pin, the support pin being located in the inner cavity, and the end of the support pin being welded to the slider body and / or the inner shell. In this way, the support pin can improve the compressive strength of the slider body.

[0014] In some embodiments, the notch includes positioning notches whose shape matches the outer contour of the support pin, so that both ends of the support pin can be snapped into the two positioning notches, thereby positioning the support pin and facilitating subsequent welding of the support pin.

[0015] In some embodiments, the slider body includes a main body and a steel liner, wherein the outer surface of the steel liner is fixedly connected to the main body, and the inner surface of the steel liner forms the inner cavity. In this way, the steel liner can reinforce the slider body and improve the pressure resistance of the slider body.

[0016] To achieve the above objectives, the present application also provides the following technical solution: a switching valve, comprising the above slider assembly.

[0017] The beneficial effects of this application are as follows: by welding the inner shell to the slider body, the inner shell and the slider body are fixed together. Neither the inner shell nor the slider assembly requires processing of a snap-fit ​​structure, simplifying processing and helping to reduce production costs. Furthermore, the inner shell and the slider body are welded together, providing a secure connection. There is no risk of the inner shell falling off the slider body, and the inner shell will not shake, thus avoiding the noise caused by shaking of the inner shell.

[0018] The details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the accompanying drawings should not be considered to limit the scope of the disclosed inventions, the presently described embodiments and / or examples, and any of the best modes currently understood for these inventions.

[0020] FIG1 is a schematic diagram of the three-dimensional structure of the slider assembly.

[0021] FIG2 is a cross-sectional view of the slider assembly.

[0022] FIG3 is an enlarged view of point A in FIG2 .

[0023] FIG4 is a schematic diagram of the three-dimensional structure of the inner shell.

[0024] FIG5 is a schematic diagram of the three-dimensional structure of a slider assembly without a support pin.

[0025] Figure numerals: 1. Slider body; 11. Inner cavity; 12. First end face; 13. Main body; 14. Steel lining; 2. Inner shell; 21. Outer flow channel; 22. Inner flow channel; 23. Notch; 24. Straight segment; 25. Second end face; 26. Positioning notch; 3. Support pin. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0029] 1 , 2 and 5 , a slider assembly of the present embodiment includes a slider body 1 and an inner shell 2. The slider body 1 includes a main body 13 and a steel liner 14. The steel liner 14 has inner and outer surfaces. The outer surface of the steel liner 14 is fixed to the main body 13, and the inner surface forms an inner cavity 11. The main body 13 can be injection molded. The main body 13 is directly injection molded on the outer surface of the steel liner 14, thereby achieving a connection between the main body 13 and the steel liner 14. The main body 13 is made of plastic, and the steel liner 14 is made of steel. The steel liner 14 can reinforce the slider body 1 and enhance the compressive performance of the slider body 1. The slider body 1 may also not have the steel liner 14. In this case, the inner surface of the main body 13 forms an inner cavity 11.

[0030] As shown in Figures 2 and 4, the inner shell 2 is located within the inner cavity 11. The inner shell 2 is bowl-shaped and has an opening. The outer surface of the inner shell 2 partially contacts the wall of the inner cavity 11, while a gap is formed between the outer surface of the inner shell 2 and the wall of the inner cavity 11. This creates an outer flow channel 21 between the outer surface of the inner shell 2 and the wall of the inner cavity 11, and an inner flow channel 22 on the inner surface of the inner shell 2. The portion where the outer surface of the inner shell 2 contacts the wall of the inner cavity 11 is welded to the wall of the inner cavity 11.

[0031] When the slider assembly is installed on the switching valve for use, the inner cavity 11 connects the two interfaces of the switching valve. When the fluid in the interface flows through the inner cavity 11, part of the fluid flows through the outer flow channel 21, and the other part of the fluid flows through the inner flow channel 22. By diverting the fluid, turbulence of the fluid in the inner cavity 11 can be avoided, thereby increasing the flow channel speed of the fluid.

[0032] By welding the inner shell 2 to the slider body 1, the inner shell 2 and the slider body 1 are secured together. Neither the inner shell 2 nor the slider assembly requires machining of a snap-fit ​​structure, simplifying processing and helping to reduce production costs. Furthermore, the welded connection between the inner shell 2 and the slider body 1 provides a secure connection, eliminating the risk of the inner shell 2 falling off the slider body 1 and preventing the inner shell 2 from shaking, thus preventing noise generated by shaking of the inner shell 2.

[0033] Specifically, as shown in Figures 1, 2, and 5, the inner shell 2 is provided with two welding portions, one on each side of the inner shell 2. The inner shell 2 is welded to the wall of the inner cavity 11 via the two welding portions. Welding methods can include laser welding, argon arc welding, cold welding, etc. Both sides of the inner shell 2 are welded to the slider body 1, providing a more stable connection.

[0034] In one embodiment, as shown in FIG. 4 , the inner shell 2 is provided with a notch 23 located at the opening of the inner shell 2 . The notch 23 forms a welding portion, and the notch 23 includes a straight line segment 24 located on the side of the notch 23 away from the opening of the inner shell 2 . Specifically, the notch 23 can be configured as a rectangular notch 23 . The notch 23 simplifies the processing of the welding portion. Furthermore, the provision of the notch 23 during welding can prevent solder from flowing onto the first end face 12 of the slider body 1 . The first end face 12 is the mating surface between the slider body 1 and the switching valve seat, which could affect the seal between the slider body 1 and the valve seat. A welder uses a welding torch to weld the notch 23 . The welding at the notch 23 can be spot welding or multi-segment continuous welding. The provision of the straight line segment 24 allows the welder to weld along the straight line segment 24 , making the welding operation more convenient.

[0035] In one embodiment, as shown in Figures 1, 2, and 3, the slider assembly further includes a support pin 3, which is positioned within the inner cavity 11. The ends of the support pin 3 are welded to the slider body 1 and / or the inner shell 2. The support pin 3 is used to support the slider body 1 and improve the compressive strength of the slider body 1. Specifically, both ends of the support pin 3 may be welded to the slider body 1, to the inner shell 2, or to both the slider body 1 and the inner shell 2. When the support pin 3 is welded to both the slider body 1 and the inner shell 2, the support pin 3, the slider body 1, and the inner shell 2 are welded together.

[0036] In one embodiment, as shown in Figures 1 to 4, the notch 23 includes a positioning notch 26. The shape of the positioning notch 26 matches the outer contour of the support pin 3 and is located on the straight section 24. The cross-section of the support pin 3 can be circular, square, rectangular, semicircular, polygonal, or D-shaped. The shape of the positioning notch 26 matches the support pin 3 so that the support pin 3 can be snapped into the positioning notch 26. In this application, the cross-section of the support pin 3 is D-shaped, and the positioning notch 26 is configured as a semicircle. Since the positioning notch 26 is located on the straight section 24, after the support pin 3 is snapped into the positioning notch 26, the support pin 3 and the notch 23 still form a straight section 24, facilitating welding between the support pin 3, the inner cavity 11 wall, and the inner shell 2. The positioning notches 26 allow both ends of the support pin 3 to snap into the two positioning notches 26, thereby positioning the support pin 3 and facilitating subsequent welding of the support pin 3.

[0037] In one embodiment, as shown in Figures 2 and 3, the slider body 1 has a first end surface 12, which is the mating surface between the slider body 1 and the valve seat of the switching valve. The inner shell 2 has a second end surface 25, which is the end surface at the opening of the inner shell 2. The second end surface 25 is located within the inner cavity 11. The distance A between the first end surface 12 and the second end surface 25 is 0.1 mm ≤ A ≤ 1 mm. The straight line segment 24 is parallel to the first end surface 12. The distance B between the straight line segment 24 and the first end surface 12 is 1.5 mm ≤ B ≤ 8 mm. The slider body 1 will wear after long-term use. The inner shell 2 is located within the inner cavity 11 of the slider body 1. After wear, the inner shell 2 may be exposed outside the inner cavity 11, affecting the sealing between the slider body 1 and the main valve body of the switching valve. The setting of the distance A provides a wear margin for the first end surface 12 of the slider body 1. The distance A can be set to 0.1 mm, 0.3 mm, 0.5 mm, or 1 mm. When the spacing B is less than 1.5 mm, there is a risk that solder will flow onto the first end surface 12 of the slider body 1, affecting sealing. Furthermore, a too small spacing is not conducive to the welding of the support pin 3. When the spacing B is greater than 8 mm, if the support pin 3 is welded on the straight segment 24 of the spacing, the support pin 3 will be positioned too deep into the inner housing 2, resulting in excessive flow resistance in the inner flow channel 22 and hindering fluid flow within the inner flow channel 22. The spacing B can be set to 1.5 mm, 3 mm, 5.5 mm, or 8 mm.

[0038] The present application also provides a switching valve, including the slider assembly of any of the above embodiments. The switching valve can be specifically configured as a four-way valve. The switching valve using the above sliding assembly can simplify the processing of the slider assembly and the inner housing 2. When the switching valve is in use, the inner housing 2 does not shake or generate noise, and the inner housing 2 does not fall off.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

[0040] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A slider assembly, comprising a slider body and an inner shell, wherein an inner cavity is formed in the slider body, the inner shell is located in the inner cavity, an outer flow channel is formed between the outer surface of the inner shell and the cavity wall of the inner cavity, and an inner flow channel is formed on the inner surface of the inner shell, characterized in that: The inner shell is welded to the cavity wall of the inner cavity.

2. A slider assembly according to claim 1, wherein: The inner shell is provided with a welding part, and two welding parts are provided. The two welding parts are respectively located at two sides of the inner shell.

3. A slider assembly according to claim 2, wherein: The inner shell is provided with a notch, the notch is located at the opening of the inner shell, and the notch forms the welding portion.

4. A slider assembly according to claim 3, wherein: The notch includes a straight line segment.

5. A slider assembly according to claim 1, wherein: The slider body has a first end surface, the inner shell has a second end surface, the second end surface is located in the inner cavity, and the distance between the first end surface and the second end surface is A, 0.1mm≤A≤1mm.

6. A slider assembly according to claim 4, wherein: The slider body has a first end surface, the straight line segment is parallel to the first end surface, and the distance between the straight line segment and the first end surface is B, 1.5 mm≤B≤8 mm.

7. A slider assembly according to claim 3, wherein: The slider assembly further includes a support pin, which is located in the inner cavity, and an end of the support pin is welded to the slider body and / or the inner shell.

8. A slider assembly according to claim 7, wherein: The notch includes a positioning recess, and the shape of the positioning recess is matched with the outer contour of the support pin.

9. A slider assembly according to claim 1, wherein: The slider body comprises a main body and a steel liner, the outer surface of the steel liner is fixedly connected to the main body, and the inner surface of the steel liner forms the inner cavity.

10. A switching valve, characterized in that: A slider assembly comprising any one of claims 1-9.

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