Sealing structure in reversing valve

Abstract

The utility model provides a sealing structure in a reversing valve, which comprises a valve body and a middle seat, the middle seat is connected to one end of the valve body, a mounting hole penetrating through two ends of the middle seat is arranged in the middle seat, a connecting sleeve is arranged in the mounting hole, one end of the connecting sleeve is connected with a motor shaft in a penetrating manner, and a gap is arranged between the connecting sleeve and the motor shaft. A sealing groove is formed in the connecting sleeve, and a sealing ring is arranged between the sealing groove and the motor shaft. The structure that two sealing rings are matched with other parts in a nested mode is changed into one sealing ring, sealing is carried out through elasticity of the sealing rings, the parts in the sealing structure do not need to be tightly matched with one another, gaps do not need to be arranged, the internal structure is further loose, and the parts are not prone to being clamped in the operation process.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic valves, specifically a sealing structure inside a directional valve. Background Technology

[0002] Chinese patent application (application number: 2024207067374) discloses an integrated connection structure that seals the interior with a first sealing ring and a second sealing ring to prevent leakage of the medium inside the valve body. However, the components of this structure are nested together and fit tightly, requiring a very high degree of concentricity. During use, internal components are prone to jamming. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a sealing structure for a reversing valve, including a valve body and a middle seat. The middle seat is connected to one end of the valve body, and an installation hole is provided inside the middle seat, penetrating both ends of the middle seat. A connecting sleeve is provided inside the installation hole, and a motor shaft is connected to one end of the connecting sleeve. A gap is provided between the connecting sleeve and the motor shaft. A sealing groove is provided inside the connecting sleeve, and a sealing ring is provided between the sealing groove and the motor shaft.

[0004] Preferably, the sealing ring has a square cross-section, and a washer with a circular cross-section is fitted on the outer wall of the sealing ring. The washer and the sealing ring are elastic, the combined thickness of the washer and the sealing ring is X, and the distance from the bottom of the sealing groove to the surface of the motor shaft is Y, where X>Y.

[0005] Preferably, one end of the connecting sleeve has a notch that penetrates one end of the sealing groove along the axial direction, and a retaining ring is installed in the notch.

[0006] Preferably, one end of the retaining ring is provided with a radially outward protruding flange.

[0007] Preferably, a deformation groove is formed in the middle of the inner wall of the sealing ring.

[0008] Preferably, two deformation grooves are provided, and the two deformation grooves are spaced apart on the inner wall of the sealing ring.

[0009] Preferably, the front and rear ends of the inner wall of the sealing ring are provided with inwardly contracting slopes.

[0010] Preferably, the width of the gap is 0.05mm-0.15mm.

[0011] The beneficial effects of this utility model are: changing the structure of two sealing rings nested with other parts to a single sealing ring, and sealing by the elasticity of the sealing ring, so that the parts inside the sealing structure do not need to fit tightly with each other. The gap is set to make the internal structure more loose and less prone to jamming during operation. Attached Figure Description

[0012] Figure 1 This is an overall structural diagram of the present invention;

[0013] Figure 2 for Figure 1 A magnified view of the marked area. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0015] Please see Figures 1-2 This utility model provides a sealing structure inside a reversing valve, including a valve body 1 and a middle seat 2. The middle seat 2 is connected to one end of the valve body 1. The middle seat 2 is provided with a mounting hole 3 that passes through both ends of the middle seat 2. A connecting sleeve 4 is provided in the mounting hole 3. A motor shaft 5 is connected to one end of the connecting sleeve 4. A gap 6 is provided between the connecting sleeve 4 and the motor shaft 5. A sealing groove is opened inside the connecting sleeve 4. A sealing ring 7 is provided between the sealing groove and the motor shaft 5.

[0016] By designing this utility model, the structure of two sealing rings 7 nested with other parts is changed to a single sealing ring 7. The sealing is achieved through the elasticity of the sealing ring 7, so that the parts within the sealing structure do not need to fit tightly together. The gap 6 is set to further loosen the internal structure, making it less likely to jam during operation.

[0017] Furthermore, the sealing ring 7 has a square cross-section, and a washer 8 is fitted on the outer wall of the sealing ring 7. The washer 8 has a circular cross-section, and the washer 8 and the sealing ring 7 are elastic. The combined thickness of the washer 8 and the sealing ring 7 is X, and the distance from the bottom of the sealing groove to the surface of the motor shaft 5 is Y, where X>Y.

[0018] By setting the washer 8, the position of the sealing ring 7 can be adjusted by its own elasticity during use, so as to prevent the sealing ring 7 from being pressed to one side of the sealing groove during use, which would affect the sealing effect. X>Y ensures that the sealing ring 7 can effectively seal the structure on the side of the motor shaft 5.

[0019] Furthermore, one end of the connecting sleeve 4 has a notch that penetrates one end of the sealing groove along the axial direction, and a retaining ring 9 is installed in the notch.

[0020] By designing the notch, the gasket 8 can be installed with minimal deformation. When selecting materials for the gasket 8, harder materials can be chosen, ensuring that the sealing structure is less prone to deformation and failure after long-term use. Furthermore, when installing the gasket 8 and sealing ring 7, the gasket 8 and sealing ring 7 are pushed into the sealing groove through the notch, and then the retaining ring 9 is installed to complete the installation. There is no need to adjust the shape and position of the sealing ring 7 and gasket 8 during installation, simplifying the installation process.

[0021] Furthermore, one end of the retaining ring 9 is provided with a radially outward protruding flange 10. The flange 10 facilitates the equipment in finding the pressing position during installation and can limit the retaining ring 9 to prevent it from compressing the sealing ring 7.

[0022] Furthermore, a deformation groove 11 is provided in the middle of the inner wall of the sealing ring 7.

[0023] The design of the deformation groove 11 makes it easy to install the sealing ring 7 onto the motor shaft 5.

[0024] Furthermore, two deformation grooves 11 are provided, and the two deformation grooves 11 are spaced apart on the inner wall of the sealing ring 7.

[0025] Furthermore, the inner walls of the sealing ring 7 are provided with inwardly contracting inclined surfaces 12 at both the front and rear ends.

[0026] With the design of the inclined surface 12, when the inside of the reversing valve is filled with medium, one end of the sealing ring 7 can be lifted. At this time, the other end can still ensure the sealing effect. After one end of the sealing ring 7 is lifted, the medium can enter the deformation groove 11. Through the pressure of the medium, the end of the sealing ring 7 that is in contact with the medium can be lifted and positioned, thereby avoiding the sealing effect from being affected by displacement.

[0027] Furthermore, the width of gap 6 is 0.05mm-0.15mm, which ensures a good seal while leaving a certain gap, thereby achieving a good balance between sealing and preventing jamming.

[0028] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A sealing structure within a reversing valve, characterized in that: The valve includes a valve body (1) and a middle seat (2). The middle seat (2) is connected to one end of the valve body (1). The middle seat (2) has mounting holes (3) that pass through both ends of the middle seat (2). A connecting sleeve (4) is provided in the mounting holes (3). A motor shaft (5) is connected to one end of the connecting sleeve (4). A gap (6) is provided between the connecting sleeve (4) and the motor shaft (5). A sealing groove is provided inside the connecting sleeve (4). A sealing ring (7) is provided between the sealing groove and the motor shaft (5).

2. The sealing structure within a reversing valve according to claim 1, characterized in that: The sealing ring (7) has a square cross-section. A gasket (8) is fitted on the outer wall of the sealing ring (7). The gasket (8) has a circular cross-section. The gasket (8) and the sealing ring (7) are elastic. The combined thickness of the gasket (8) and the sealing ring (7) is X. The distance from the bottom of the sealing groove to the surface of the motor shaft (5) is Y, where X>Y.

3. The sealing structure within a reversing valve according to claim 2, characterized in that: One end of the connecting sleeve (4) has a notch that penetrates one end of the sealing groove along the axial direction, and a retaining ring (9) is installed in the notch.

4. The sealing structure within a reversing valve according to claim 3, characterized in that: One end of the retaining ring (9) is provided with a radially outward protruding flange (10).

5. The sealing structure within a reversing valve according to claim 2, characterized in that: A deformation groove (11) is provided in the middle of the inner wall of the sealing ring (7).

6. The sealing structure within a reversing valve according to claim 5, characterized in that: Two deformation grooves (11) are provided, and the two deformation grooves (11) are spaced apart on the inner wall of the sealing ring (7).

7. A sealing structure within a reversing valve according to claim 5 or 6, characterized in that: The inner walls of the sealing ring (7) are provided with inwardly contracting inclined surfaces (12) at both the front and rear ends.

8. The sealing structure within a reversing valve according to claim 1, characterized in that: The width of the gap (6) is 0.05mm-0.15mm.

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