CN220365983U - Hydraulic reversing valve - Google Patents

Abstract

The utility model discloses a hydraulic reversing valve, which comprises a valve body and a valve core, wherein the valve body comprises a left valve body, a valve body main body and a right valve body which are distributed in sequence from left to right; the left valve body is provided with a control oil channel; the right valve body is provided with an oil supply channel; the inner wall of the valve body main body is provided with an oil inlet cavity, a working cavity and an oil return cavity which are sequentially distributed from left to right; the valve core is arranged in the valve body, a first control cavity is arranged between the left valve body and the valve core, the control oil channel is communicated with the first control cavity, a second control cavity is arranged between the right valve body and the valve core, the oil supply channel is communicated with the second control cavity, and the size of the first control cavity is larger than that of the second control cavity; the valve core is internally provided with a compensation channel and a damping hole, and the compensation channel is communicated with the first control cavity; one end of the damping hole is communicated with the compensation channel, and the other end of the damping hole extends to the outside of the valve core; the outer wall of the valve core is provided with a first communication cavity and a second communication cavity which are distributed in sequence from left to right. The utility model can ensure the stable and reliable valve core position and prolong the service life.

Description

Hydraulic reversing valve

Technical Field

The utility model relates to the technical field of reversing valves, in particular to a hydraulic reversing valve.

Background

The reversing valve is a directional control valve with more than two flow forms and more than two oil ports, is a valve for realizing communication, cutting-off and reversing of hydraulic oil flow, pressure unloading and sequential action control, and generally comprises an electromagnetic reversing valve, a hydraulic reversing valve and a pneumatic reversing valve, wherein the hydraulic reversing valve is a directional control valve for changing the flow direction of fluid by pushing a valve core by controlling the pressure of the liquid.

However, in the use process of the existing hydraulic reversing valve, on one hand, the position of the valve core is easy to generate fluctuation deviation, and misoperation of an executing element and a control element can be possibly caused; on the other hand, the reversing valve and the executive component are easy to wear after long-time use, so that leakage is generated, and the service life is influenced.

Therefore, it is a great need for a hydraulic reversing valve that operates stably and reliably.

Disclosure of Invention

In view of the above, the utility model provides a hydraulic reversing valve, which can ensure the stable and reliable valve core position and prolong the service life.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a hydraulic reversing valve comprising:

the valve body comprises a left valve body, a valve body main body and a right valve body which are sequentially distributed from left to right and are connected into a whole; the left valve body is provided with a control oil channel; the right valve body is provided with an oil supply channel; an oil inlet cavity, a working cavity and an oil return cavity are sequentially distributed on the inner wall of the valve body main body from left to right;

the valve core is arranged in the valve body main body and the right valve body, a first control cavity is formed between the left valve body and the valve core, the control oil channel is communicated with the first control cavity, a second control cavity is formed between the right valve body and the valve core, the oil supply channel is communicated with the second control cavity, and the size of the first control cavity is larger than that of the second control cavity; the valve core is internally provided with a compensation channel which is horizontally distributed and damping holes which are vertically distributed, one end of the compensation channel is closed, and the other end of the compensation channel is communicated with the first control cavity; one end of the damping hole is communicated with the compensation channel, and the other end of the damping hole extends to the outside of the valve core; the outer wall of the valve core is provided with a first communication cavity and a second communication cavity which are distributed in sequence from left to right.

By adopting the scheme, the utility model has the beneficial effects that:

1) Through the action of the damping hole, even if the control oil source has small fluctuation, the damping hole can compensate in time, so that the stable and reliable valve core position is ensured;

2) When the reversing valve and the executing element are worn for a long time to generate leakage, the damping hole can be compensated in time, so that the service life is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a valve core of a hydraulic reversing valve in a left position;

fig. 2 is a schematic structural view of a valve core of the hydraulic reversing valve provided by the utility model in a right position state.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 and 2, the embodiment of the utility model discloses a hydraulic reversing valve, which comprises a valve body 1 and a valve core 2, wherein the valve body 1 comprises a left valve body 11, a valve body main body 12 and a right valve body 13 which are sequentially distributed from left to right and are connected into a whole; the left valve body 11 has a control oil passage 111; the right valve body 13 has an oil supply passage 131; the inner wall of the valve body main body 12 is provided with an oil inlet cavity 121, a working cavity 122 and an oil return cavity 123 which are sequentially distributed from left to right; the valve core 2 is arranged in the valve body main body 12 and the right valve body 13, a first control cavity 3 is formed between the left valve body 11 and the valve core 2, a control oil channel 111 is communicated with the first control cavity 3, a second control cavity 4 is formed between the right valve body 13 and the valve core 2, an oil supply channel 131 is communicated with the second control cavity 4, and the size of the first control cavity 3 is larger than that of the second control cavity 4; the valve core 2 is internally provided with a compensating channel 21 which is horizontally distributed and a damping hole 22 which is vertically distributed, one end of the compensating channel 21 is closed, and the other end of the compensating channel 21 is communicated with the first control cavity 3; one end of the damping hole 22 is communicated with the compensation channel 21, and the other end extends to the outside of the valve core 2; the outer wall of the valve core 2 is provided with a first communication cavity 23 and a second communication cavity 24 which are distributed in sequence from left to right. According to the utility model, through the action of the damping hole 22, even if the control oil source has small fluctuation, the damping hole 22 can be compensated in time, so that the stable and reliable position of the valve core 2 is ensured; meanwhile, after the reversing valve and the executive component are worn for a long time to generate leakage, the damping hole 22 can be compensated in time, so that the service life is prolonged.

The working principle of the utility model is as follows:

the reversing action of the utility model is to reverse by the pressure difference of the first control cavity 3 and the second control cavity 4, and the reversing impact is reduced by the pressure change of the first control cavity 3, wherein the second control cavity 4 is in a normal oil supply state, when the first control cavity 3 is in a low pressure state, the working cavity 122 and the oil return cavity 123 are communicated through the second communication cavity 24, and the valve core 2 is stable at the position due to the compensation action of the damping hole 22; when the first control chamber 3 introduces high pressure oil, the valve core 2 is pushed to move to the other side, and at this time, the working chamber 122 and the oil inlet chamber 121 are communicated through the first communication chamber 23, and at this time, the valve core 2 is stabilized at a position after reversing due to the effect of the damping hole 22.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (1)

1. A hydraulic reversing valve, comprising:

the valve body comprises a left valve body, a valve body main body and a right valve body which are sequentially distributed from left to right and are connected into a whole; the left valve body is provided with a control oil channel; the right valve body is provided with an oil supply channel; an oil inlet cavity, a working cavity and an oil return cavity are sequentially distributed on the inner wall of the valve body main body from left to right;

the valve core is arranged in the valve body main body and the right valve body, a first control cavity is formed between the left valve body and the valve core, the control oil channel is communicated with the first control cavity, a second control cavity is formed between the right valve body and the valve core, the oil supply channel is communicated with the second control cavity, and the size of the first control cavity is larger than that of the second control cavity; the valve core is internally provided with a compensation channel which is horizontally distributed and damping holes which are vertically distributed, one end of the compensation channel is closed, and the other end of the compensation channel is communicated with the first control cavity; one end of the damping hole is communicated with the compensation channel, and the other end of the damping hole extends to the outside of the valve core; the outer wall of the valve core is provided with a first communication cavity and a second communication cavity which are distributed in sequence from left to right.