Pressure balance structure of reversing valve

Abstract

The utility model provides a pressure balancing structure of a reversing valve, which comprises a guide sleeve and a screw rod, the guide sleeve is provided with a guide hole, the screw rod is connected with a guide block matched with the guide hole in shape, the screw rod is provided with a pressure stabilizing hole arranged along the axial direction, the side wall of the pressure stabilizing hole is provided with a through hole, and a pressure stabilizing channel is arranged between the side wall of the guide hole and the guide block. When the lead screw works, liquid in front of and behind the lead screw circulates through the through hole and the pressure stabilizing hole, and the hydraulic difference generated when the lead screw moves is greatly reduced; liquid in front of and behind the guide block circulates through the pressure stabilizing channel, hydraulic pressure difference in front of and behind the guide block is greatly reduced, hydraulic vibration of components in the front end cover is avoided, normal work of the components is kept, and the service life of the components is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic equipment, in particular to a pressure balancing structure of a reversing valve. Background Art

[0002] A Chinese patent (Announcement No.: CN220566342U) discloses a reversing valve, in which a moving sleeve, a screw and other structures are installed in the front cover. Since the front cover is connected to the valve body, the front cover will be filled with liquid during operation; when the screw moves along the axial direction, a pressure difference will be generated before and after the screw guide structure, causing hydraulic vibrations in the components in the front cover, affecting the normal operation of the components and shortening the life of the components. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a pressure balancing structure for a reversing valve, including a guide sleeve and a screw rod, the guide sleeve is provided with a guide hole, the screw rod is connected with a guide block whose shape matches the guide hole, the screw rod is provided with a pressure stabilizing hole arranged along the axial direction, the side wall of the pressure stabilizing hole is provided with a through hole, and a pressure stabilizing channel is provided between the side wall of the guide hole and the guide block.

[0004] Preferably, the pressure-stabilizing channel includes a groove that penetrates the guide sleeve axially, and the groove is arranged on the side wall of the guide hole.

[0005] Preferably, four grooves are provided and are evenly arranged at the four corners of the guide hole.

[0006] Preferably, a pressure stabilizing groove is provided on the guide block and penetrates the guide block in the axial direction.

[0007] Preferably, the pressure stabilizing groove is arranged on the outer side wall of the guide block.

[0008] Preferably, the cross section of the guide block is waist-shaped, and two voltage-stabilizing grooves are provided, symmetrically arranged on both sides of the length direction of the cross section of the guide block.

[0009] Preferably, the width of the guide block is 0.1 mm-0.5 mm larger than the outer diameter of the screw rod.

[0010] Preferably, the screw rod and the guide block are integrally arranged.

[0011] The beneficial effects of the utility model are as follows: when the screw rod is working, the liquid before and after the screw rod flows through the through hole and the pressure-stabilizing hole, which greatly reduces the hydraulic pressure difference generated when the screw rod moves; the liquid before and after the guide block flows through the pressure-stabilizing channel, which greatly reduces the hydraulic pressure difference before and after the guide block, thereby avoiding hydraulic vibration of the components inside the front end cover, maintaining the normal operation of the components, and extending the service life of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the overall structure diagram of the utility model;

[0013] Figure 2 for Figure 1 A partial enlarged view of the marked area;

[0014] Figure 3 This is the structural diagram of the guide sleeve;

[0015] Figure 4 It is a structural diagram of the first embodiment of the screw rod and the guide block;

[0016] Figure 5 It is a structural diagram of the second embodiment of the screw rod and the guide block. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0018] See also Figure 1-Figure 3 The utility model provides a pressure balancing structure of a reversing valve, including a guide sleeve 1 and a screw rod 2. The guide sleeve 1 is provided with a guide hole 3. The screw rod 2 is connected with a guide block 4 whose shape matches the guide hole 3. The screw rod 2 is provided with an axially arranged pressure stabilizing hole 5. A through hole 6 is provided on the side wall of the pressure stabilizing hole 5. A pressure stabilizing channel is provided between the side wall of the guide hole 3 and the guide block 4.

[0019] When the screw rod 2 is working, the liquid before and after the screw rod 2 flows through the through hole 6 and the pressure-stabilizing hole 5, which greatly reduces the hydraulic pressure difference generated when the screw rod 2 moves; the liquid before and after the guide block 4 flows through the pressure-stabilizing channel, which greatly reduces the hydraulic pressure difference before and after the guide block 4, thereby avoiding hydraulic vibration of the components inside the front end cover, maintaining the normal operation of the components, and extending the service life of the components.

[0020] Furthermore, the pressure stabilizing channel includes a groove 7 that penetrates the guide sleeve 1 in the axial direction, and the groove 7 is arranged on the side wall of the guide hole 3 .

[0021] Through the above design, the liquids before and after the guide block 4 are connected, the structure is simple and easy to manufacture, and the influence on the overall structural strength is small.

[0022] Furthermore, four grooves 7 are provided, which are evenly arranged at the four corners of the guide hole 3. Through the above design, the liquid before and after the guide sleeve flows more smoothly, and the hydraulic pressure difference generated during movement is reduced to a greater extent.

[0023] Furthermore, a pressure stabilizing groove 8 is provided on the guide block 4 and penetrates the guide block 4 in the axial direction, so as to increase the pressure stabilizing channel before and after the guide block 4 and further reduce the hydraulic pressure difference before and after the guide block 4 .

[0024] As a first embodiment of the pressure stabilizing groove 8, the pressure stabilizing groove 8 is arranged on the outer wall of the guide block 4. The pressure stabilizing groove 8 is designed on the outer wall of the guide block 4. When the guide block 4 is formed, it is more convenient to form the overall structure and reduce subsequent processing steps.

[0025] As a second embodiment, the cross-section of the guide block 4 is waist-shaped, and two pressure-stabilizing grooves 8 are provided, which are symmetrically arranged on both sides of the length direction of the cross-section of the guide block 4. The guide block 4 is designed to be waist-shaped, so that the guide block 4 has the function of cooperating with the guide hole 3, and the overall structure is easier to form and more convenient to process.

[0026] Furthermore, the width of the guide block 4 is 0.1 mm to 0.5 mm larger than the outer diameter of the screw rod 2 , which ensures the function of the guide block 4 while saving materials, reducing the space required for installing the guide block 4 and making the overall structure more compact.

[0027] Furthermore, the screw rod 2 and the guide block 4 are integrally arranged, so that the structure of the screw rod 2 and the guide block 4 is more solid.

[0028] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A pressure balancing structure of a reversing valve, characterized in that: The invention comprises a guide sleeve (1) and a screw rod (2), wherein the guide sleeve (1) is provided with a guide hole (3), the screw rod (2) is connected with a guide block (4) whose shape matches the guide hole (3), the screw rod (2) is provided with a pressure stabilizing hole (5) arranged along the axial direction, a through hole (6) is provided on the side wall of the pressure stabilizing hole (5), and a pressure stabilizing channel is provided between the side wall of the guide hole (3) and the guide block (4).

2. The pressure balancing structure of a reversing valve according to claim 1, characterized in that: The pressure-stabilizing channel comprises a groove (7) that penetrates the guide sleeve (1) in the axial direction, and the groove (7) is arranged on the side wall of the guide hole (3).

3. The pressure balancing structure of a reversing valve according to claim 2, characterized in that: Four grooves (7) are provided and are evenly arranged at the four corners of the guide hole (3).

4. The pressure balancing structure of a reversing valve according to claim 3, characterized in that: The guide block (4) is provided with a pressure stabilizing groove (8) which penetrates the guide block (4) in the axial direction.

5. The pressure balancing structure of a reversing valve according to claim 4, characterized in that: The pressure stabilizing groove (8) is arranged on the outer side wall of the guide block (4).

6. The pressure balancing structure of a reversing valve according to claim 4, characterized in that: The cross section of the guide block (4) is waist-shaped, and two voltage-stabilizing grooves (8) are provided, symmetrically arranged on both sides of the cross section of the guide block (4) in the length direction.

7. The pressure balancing structure of a reversing valve according to claim 6, characterized in that: The width of the guide block (4) is 0.1 mm to 0.5 mm greater than the outer diameter of the screw rod (2).

8. The pressure balancing structure of a reversing valve according to claim 1, characterized in that: The screw rod (2) and the guide block (4) are arranged integrally.

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