EP-4741690-A1 - SLIDING BLOCK ASSEMBLY AND SWITCHING VALVE

Abstract

A sliding block assembly and a switching valve are provided. The sliding block assembly includes a slider body (1) and an inner shell (2). The slider body (1) is provided with an internal cavity (11), the inner shell (2) is located in the internal cavity (11), an outer flow channel (21) is enclosed between an outer surface of the inner shell (2) and a cavity wall of the internal cavity (11). An inner flow channel (22) is enclosed by an inner surface of the inner shell (2), the inner shell (2) is fixed to the cavity wall of the internal cavity (11) by welding.

Inventors

• SHAO, Jucan
• LIU, HAIBO
• Yi, Wei

Assignees

• Zhejiang Dunan Artificial Environment Co., Ltd.

Dates

Publication Date

20260513

Application Date

20241115

Claims (10)

1. A sliding block assembly, comprising a slider body and an inner shell, wherein the slider body is provided with an internal cavity, the inner shell is located in the internal cavity, an outer flow channel is enclosed between an outer surface of the inner shell and a cavity wall of the internal cavity, an inner flow channel is enclosed by an inner surface of the inner shell, characterized in that the inner shell is fixed to the cavity wall of the internal cavity by welding.
2. The sliding block assembly of claim 1, wherein two welding portions are disposed on the inner shell and located on two sides of the inner shell, respectively.
3. The sliding block assembly of claim 2, wherein the inner shell is provided with a notch, the notch is located at an opening of the inner shell, and the notch is configured as the welding portion.
4. The sliding block assembly of claim 3, wherein the notch comprises a straight section.
5. The sliding block assembly of claim 1, wherein the slider body has a first end surface, the inner shell has a second end surface, the second end surface of the inner shell is located in the internal cavity, a distance between the first end surface of the slider body and the second end surface of the inner shell is defined as A, and the distance A between the first end surface of the slider body and the second end surface of the inner shell is in a range of 0.1 mm to 1 mm.
6. The sliding block assembly of claim 4, wherein the slider body has a first end surface, the straight section is parallel to the first end surface of the slider body, a distance between the straight section and the first end surface of the slider body is defined as B, and the distance B between the straight section and the first end surface of the slider body is in a range of 1.5 mm to 8 mm.
7. The sliding block assembly of claim 3, further comprising a support pin, wherein the support pin is located in the internal cavity, and an end of the support pin is fixed to the slider body and/or the inner shell by welding.
8. The sliding block assembly of claim 7, wherein the notch further comprises a positioning recess, and a shape of the positioning recess is adapted to an outer contour of the support pin.
9. The sliding block assembly of claim 1, wherein the slider body comprises a main body and a steel bushing, an outer surface of the steel bushing is fixedly connected to the main body, and an inner surface of the steel bushing forms the internal cavity.
10. A switching valve, characterized by comprising the sliding block assembly of any one of claims 1 to 9.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to Chinese Patent Application No. 202323290508.3, filed on December 04, 2023 with Chinese patent office, entitled "SLIDING BLOCK ASSEMBLY AND SWITCHING VALVE", the content of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD The present application relates to the field of switching valve technology, and in particular, to a sliding block assembly and a switching valve. BACKGROUND The switching valve includes a valve body and a sliding block assembly. A plurality of nozzles are connected to the valve body, and the sliding block assembly is slidably disposed within the valve body, with an internal cavity formed inside the sliding block assembly. By sliding the sliding block assembly within the valve body, different nozzles can communicate with each other via the internal cavity, thereby achieving reversing of the switching valve. Some sliding block assemblies is further provided with an inner shell. The inner shell divides the internal cavity of the sliding block assembly into two flow passages, so as to avoid turbulence when a fluid flows through the internal cavity. In the relate art, the sliding block assembly configured with an inner shell, the inner shell is generally clamped to the sliding block assembly. On the one hand, separate machining of clamping-fit structures is required for both the inner shell and the sliding block assembly, which complicates machining of the inner shell and the sliding block assembly and increases production costs. On the other hand, the inner shell is not stably mounted; the inner shell may wobble under fluid impact, generating noise, and there is a risk that the inner shell may detach from the sliding block assembly. SUMMARY According to various embodiments of the present application, a slider block assembly and a switching valve are provided. The present application provides the following technical solutions: a sliding block assembly. The sliding block assembly includes a slider body and an inner shell. The slider body is provided with an internal cavity, the inner shell is located in the internal cavity, an outer flow channel is enclosed between an outer surface of the inner shell and a cavity wall of the internal cavity. An inner flow channel is enclosed by an inner surface of the inner shell. The inner shell is fixed to the cavity wall of the internal cavity by welding. In some embodiments, two welding portions are disposed on the inner shell and located on two sides of the inner shell, respectively. In this way, both sides of the inner shell are fixed to the slider body by welding, resulting in a more stable connection. In some embodiments, the inner shell is provided with a notch, the notch is located at an opening of the inner shell, and the notch is configured as the welding portion. In this way, the welding portion is simple to machine, and welding via the notch prevents solder from flowing to the first end surface of the slider body, which would otherwise affect the sealing between the slider body and a valve seat. In some embodiments, the notch includes a straight section. In this way, an operator can perform welding along the straight section, making the welding operation more convenient. In some embodiments, the slider body has a first end surface, the inner shell has a second end surface, the second end surface of the inner shell is located in the internal cavity, a distance between the first end surface of the slider body and the second end surface of the inner shell is defined as A, and the distance A between the first end surface of the slider body and the second end surface of the inner shell is in a range of 0.1 mm to 1 mm. In this way, the distance A between the first end surface of the slider body and the second end surface of the inner shell reserves a wear allowance for the first end surface of the slider body. In some embodiments, the slider body has a first end surface, the straight section is parallel to the first end surface of the slider body, a distance between the straight section and the first end surface of the slider body is defined as B, and the distance B between the straight section and the first end surface of the slider body is in a range of 1.5 mm to 8 mm. In this way, the distance B between the straight section and the first end surface of the slider body ensures the spacing between the welding position and the first end surface of the slider body, preventing welding from affecting the flatness of the first end surface of the slider body. In some embodiments, the sliding block assembly further includes a support pin, the support pin is located in the internal cavity, and an end of the support pin is fixed to the slider body and/or the inner shell by welding. In this way, the support pin can improve a compressive capacity of the slider body. In some embodiments, the notch further includes a positioning recess, and a shape of the positioning