Hydraulic control valve, hydraulic operating mechanism and circuit breaker using the hydraulic control valve

A technology of hydraulic control valve and hydraulic operation, applied in the fields of hydraulic control valve, hydraulic operation mechanism and circuit breaker, can solve the problems of easy oil leakage, complex structure of hydraulic control valve, complex structure of hydraulic operation mechanism, etc. Simple structure and the effect of reducing the difficulty of processing and assembling

Active Publication Date: 2022-01-28
PINGGAO GRP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a hydraulic control valve to solve the technical problems of complex structure and easy oil leakage in the prior art; also provide a hydraulic operating mechanism using the hydraulic control valve to solve the existing problems. In the technology, the structure of the hydraulic operating mechanism is complicated, and it is impossible to ensure that the moving contact is in place or difficult to maintain the opening and closing state; a circuit breaker using the hydraulic control valve is also provided to solve the above technical problems

Method used

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  • Hydraulic control valve, hydraulic operating mechanism and circuit breaker using the hydraulic control valve
  • Hydraulic control valve, hydraulic operating mechanism and circuit breaker using the hydraulic control valve

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specific Embodiment 1

[0058] Such as Figure 1 to Figure 2 As shown, the hydraulic control valve includes a valve body 1, a valve core 9, a driving rod 8, and a repulsion mechanism 2 that drives the valve core 9 to reciprocate.

[0059] Such as figure 1 As shown, the longitudinal direction of the valve body 1 is the axial direction of the valve body 1 , the axial direction of the valve body 1 is the left-right direction, and the repulsion mechanism 2 is located on the left side of the valve body 1 . There is a valve cavity 3 inside the valve body 1, and the valve cavity 3 extends left and right, and the inner walls of the valve cavity 3 are all of equal diameter, so that the valve cavity 3 forms an equal diameter structure. The valve body 1 is provided with a normal high pressure oil port 4 , a control oil port 5 and a normal low pressure oil port 6 sequentially from left to right, and each oil port communicates with the inside of the valve cavity 3 . The normal and high pressure oil port 4, the ...

Embodiment 1

[0070] In Embodiment 1, the axial length of the spool is smaller than the axial distance between the normal high pressure oil port and the control oil port, and is also smaller than the axial distance between the normal low pressure oil port and the control oil port. In this embodiment, the axial length of the spool can be only smaller than the axial distance between the normal high pressure oil port and the control oil port, and equal to the axial distance between the normal low pressure oil port and the control oil port. Of course, it can also be slightly larger than the normal low pressure oil port. Axial distance between oil port and control oil port. Or the axial length of the spool can be only smaller than the axial distance between the normal low pressure oil port and the control oil port, and equal to the axial distance between the normal high pressure oil port and the control oil port. Of course, it can also be slightly larger than the normal high pressure oil port and...

specific Embodiment 3

[0072] In Embodiment 1, each oil port is radially arranged on the valve body. In this embodiment, the normal and low pressure oil ports can be arranged at the end of the valve body.

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Abstract

The invention relates to a hydraulic control valve, a hydraulic operating mechanism and a circuit breaker using the hydraulic control valve. The hydraulic control valve includes a valve body with a valve cavity inside. High-pressure oil port, control oil port and normal low-pressure oil port; valve core; the inner wall of the valve cavity is provided with an equal-diameter straight section between the normal-high-pressure oil port and the normal-high-low oil port. At least one of them is provided with a sealing ring to realize the sliding and sealing fit between the valve core and the equal-diameter straight section; the reciprocating sliding stroke of the valve core has a first limit position and a second limit position. Between the high pressure oil port and the control oil port, the normal and low pressure oil port is connected with the control oil port; when it is in the second limit position, the spool is located between the normal and low pressure oil port and the control oil port, and the normal and high pressure oil port is connected with the control oil port . The requirements for the position of the spool after it moves into place are not too strict, and a certain position deviation is allowed, which reduces the difficulty of processing and assembly.

Description

technical field [0001] The invention relates to a hydraulic control valve, a hydraulic operating mechanism and a circuit breaker using the hydraulic control valve. Background technique [0002] The opening and closing speed of the circuit breaker is a key parameter of the performance of the circuit breaker. For the circuit breaker whose opening and closing are controlled by the hydraulic operating mechanism, the opening and closing speed of the circuit breaker is determined by the hydraulic operating mechanism. The hydraulic operating mechanism includes a working cylinder and a hydraulic control valve. The piston in the working cylinder drives the moving contact to open and close, and the hydraulic control valve controls the movement of the piston in the working cylinder. Therefore, the opening and closing speed of the circuit breaker is finally controlled by the hydraulic pressure. It depends on the response speed of the valve. [0003] Most of the existing hydraulic contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F16K31/06H01H3/32
CPCF15B13/021F16K31/0613F16K31/0679F16K31/0689H01H3/32
Inventor 陈维江钟建英李海文林莘韩彬刘煜郄鑫韩国辉雷琴刘宇段晓辉魏建巍孙珂珂李新刚
Owner PINGGAO GRP
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