CN215890635U

CN215890635U - Hydraulic valve

Info

Publication number: CN215890635U
Application number: CN202121201002.9U
Authority: CN
Inventors: 汪立平; 贾靖; 杨哲; 哈良; 孙晓龙; 孙浩乾; 杨传家; 翟莉; 刘红光
Original assignee: Jiangsu Hengli Hydraulic Technology Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Technology Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-02-22
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to the technical field of hydraulic pressure, in particular to a hydraulic valve. A hydraulic valve, comprising: the valve body is internally provided with a pressure oil passage and at least two working oil passages; and the valve core is assembled in the valve body in a sliding manner, and can control the pressure oil duct to be communicated with at least two working oil ducts simultaneously in a sliding manner. The number of the working oil passages is two, and the two working oil passages are distributed on two sides of the pressure oil passage. The two working oil passages are symmetrically arranged on two sides of the pressure oil passage. The pressure oil duct comprises two oil dividing ducts, and pressure oil entering from the pressure oil duct inlet flows to the two oil dividing ducts in a one-way mode under the action of a one-way valve. The pressure oil ducts are of a symmetrical structure, and the valve core can control the two oil distribution ducts to be respectively communicated with the adjacent working oil ducts. The technical problems that a reversing valve in the prior art adopts a single oil port for supplying oil and the pressure loss is high are solved.

Description

Hydraulic valve

Technical Field

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

Background

The reversing valve is a valve which changes the on-off relationship of an oil duct connected to a valve body by means of the relative movement between a valve core and the valve body. The hydraulic reversing valve is a control element in a hydraulic system and controls the action of an actuating element of the hydraulic oil cylinder, so that the performance of the hydraulic multi-way valve is good and poor, and the influence on the whole hydraulic system is great.

The reversing valve in the prior art is generally provided with two working oil passages, and the two working oil passages are respectively communicated with a rod cavity and a rodless cavity of a hydraulic oil cylinder to control the action of the hydraulic oil cylinder. The reversing valve is internally provided with a pressure oil duct and an oil return duct, when a valve core of the reversing valve is reversed to a working position, the valve core controls the pressure oil duct to be communicated with one working oil duct, and the other working oil duct is communicated with the oil return duct, so that oil is fed into one rod cavity and oil is returned into the other rod cavity. The reversing valve can realize the control of the hydraulic oil cylinder, but adopts a single oil port oil supply mode, so that the pressure loss is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hydraulic valve, which solves the technical problems that a reversing valve in the prior art adopts a single oil port for supplying oil and the pressure loss is high. The technical scheme of the utility model is as follows:

a hydraulic valve, comprising:

the valve body is internally provided with a pressure oil passage and at least two working oil passages;

and the valve core is assembled in the valve body in a sliding manner, and can control the pressure oil duct to be communicated with at least two working oil ducts simultaneously in a sliding manner.

The utility model provides a set up pressure oil duct and two at least work oil ducts in the valve body of hydrovalve, when the case slided, steerable pressure oil duct communicates with two at least work oil ducts simultaneously, and then the pressure oil in the pressure oil duct can get into two at least work oil ducts simultaneously to through two at least work oil duct oil outlets. Compare in prior art pressure oil duct only with a work oil duct intercommunication, the pressure loss is big, the pressure oil duct of this application simultaneously with two at least work oil ducts intercommunication, can increase the oil and lead to the face, pressure loss greatly reduced.

According to one embodiment of the present invention, the number of the working oil passages is two, and the two working oil passages are arranged on both sides of the pressure oil passage.

According to one embodiment of the utility model, the two working oil passages are symmetrically arranged on both sides of the pressure oil passage.

According to one embodiment of the present invention, the pressure oil passage includes two branch oil passages, and the pressure oil entering from the pressure oil passage inlet is communicated to the two branch oil passages in a one-way manner by a check valve.

According to one embodiment of the utility model, the pressure oil passages are of a symmetrical structure, and the valve core can control the two oil distribution passages to be respectively communicated with the adjacent working oil passages.

According to one embodiment of the utility model, the valve core is a rod-shaped body with a variable outer diameter, two throttling grooves are formed on the outer surface of the valve core, and the oil distribution passage is communicated with the adjacent working oil passages through the throttling grooves.

According to one embodiment of the utility model, pilot oil cavities are formed at two axial ends of the valve core, and the valve core slides under the action of the pilot oil at the two ends.

According to one embodiment of the utility model, the valve body is provided with a first end cover and a second end cover, a first pilot oil chamber is formed in the first end cover, a second pilot oil chamber is formed in the second end cover, and an elastic member is arranged in the first pilot oil chamber and acts on the valve core.

According to one embodiment of the utility model, a relief valve is provided on the working oil gallery.

Based on the technical scheme, the utility model can realize the following technical effects:

1. according to the hydraulic valve, the pressure oil passage and the at least two working oil passages are arranged in the valve body, when the valve core slides, the pressure oil passage can be controlled to be simultaneously communicated with the at least two working oil passages, and pressure oil in the pressure oil passage can simultaneously enter the at least two working oil passages and can be discharged through the at least two working oil passages. Compared with the prior art that the pressure oil duct is only communicated with one working oil duct, and the pressure loss is large, the pressure oil duct is simultaneously communicated with at least two working oil ducts, so that the oil communication surface can be enlarged, and the pressure loss is greatly reduced; oil outlets of the at least two working oil passages can respectively supply oil or carry out confluent oil supply through an external valve block;

2. according to the hydraulic valve, the pressure oil duct comprises the two branch oil ducts, the two working oil ducts are symmetrically arranged on the two sides of the pressure oil duct, and the branch oil ducts are communicated with the adjacent working oil ducts through the throttling grooves by combining the throttling grooves of the valve core, and the two branch oil ducts are simultaneously communicated with the adjacent pressure oil ducts;

3. according to the hydraulic valve, the pilot oil cavities are arranged at the two axial ends of the valve core, so that the movement of the valve core can be controlled through the pilot oil; the safety valve is arranged on the working oil duct, so that the oil pressure on the working oil duct can be controlled, and the oil pressure is prevented from being too high.

Drawings

FIG. 1 is a schematic diagram of a hydraulic valve according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

in the figure: 1-a valve body; 2-a pressure oil duct; 21-a first oil distribution passage; 22-a second oil distribution duct; 23-a one-way valve; 31-a first working oil path; 32-a second working oil path; 4-a valve core; 41-a first throttling groove; 42-a second throttle groove; 51-a first pilot oil chamber; 52-a second pilot oil chamber; 61-a first end cap; 62-a second end cap; 7-an elastic member; 81-a first safety valve; 82-second relief valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 3, the present embodiment provides a hydraulic valve, which includes a valve body 1 and a valve core 4, wherein a plurality of oil ducts are provided in the valve body 1, specifically including a pressure oil duct 2 and a working oil duct, the valve core 4 is slidably assembled in the valve body 1, and the valve core 4 slidably controls on/off of the pressure oil duct 2 and the working oil duct.

The pressure oil duct 2 has an inlet P for receiving pressure oil, the pressure oil duct 2 includes two oil dividing ducts, which are a first oil dividing duct 21 and a second oil dividing duct 22, a check valve 23 is further disposed in the pressure oil duct 2, and the check valve 23 controls the pressure oil to flow in one direction in the pressure oil duct 2. The pressure oil entering from the inlet P passes through the check valve 23 and then flows to the first oil distribution passage 21 and the second oil distribution passage 22, and the first oil distribution passage 21 and the second oil distribution passage 22 are symmetrically arranged.

The number of the working oil passages is two, and the two working oil passages are respectively a first working oil passage 31 and a second working oil passage 32, and the first working oil passage 31 and the second working oil passage 32 are arranged on two sides of the pressure oil passage 2. Specifically, the first working oil passage 31 is provided close to the first working oil passage 21, the second working oil passage 32 is provided close to the second working oil passage 22, and the spool 4 is slidably arranged to control the first working oil passage 21 to communicate with the first working oil passage 31, and the second working oil passage 22 to communicate with the second working oil passage 32. Preferably, the first working oil passage 31 and the second working oil passage 32 are symmetrically arranged.

As a preferred technical solution of this embodiment, in order to ensure the pressure of the working oil gallery, safety valves are disposed on both the first working oil gallery 31 and the second working oil gallery 32, and when the oil pressure of the working oil gallery exceeds a threshold value, the pressure oil on the working oil gallery can be relieved through the safety valves. Specifically, the first relief valve 81 is provided on the first working oil passage 31, and the second relief valve 82 is provided on the second working oil passage 32.

The valve core 4 is slidably assembled in the valve body 1, the valve core 4 is a rod-shaped body with a variable outer diameter, a first throttle groove 41 and a second throttle groove 42 are formed on the outer surface of the valve core 4, the first throttle groove 41 and the second throttle groove 42 are annular grooves formed on the outer surface of the valve core 4, the first branch oil gallery 21 is communicated with the first working oil gallery 31 through the first throttle groove 41, and the second branch oil gallery 22 is communicated with the second working oil gallery 32 through the second throttle groove 42.

As a preferable technical solution of the present embodiment, pilot oil chambers are formed at both ends of the valve element 4 in the axial direction, and the valve element 4 slides in the valve body 1 under the action of the pilot oil. Specifically, a slide hole with openings at two ends is formed in the valve body 1, the valve core 4 is assembled in the slide hole in a sliding mode, end covers are fixed on the valve body 1 at the openings at two ends of the slide hole, and a pilot oil cavity is formed in each end cover. In this embodiment, a first end cover 61 is fixed at an opening at one end of a slide hole of the valve body 1, a first pilot oil chamber 51 is formed in the first end cover 61, a second end cover 62 is fixed at an opening at the other end of the slide hole of the valve body 1, a second pilot oil chamber 52 is formed in the second end cover 62, and pilot oil is introduced into the first pilot oil chamber 51 and the second pilot oil chamber 52. Preferably, the elastic member 7 is provided in the first pilot oil chamber 51 and/or the second pilot oil chamber 52.

Based on the above structure, the hydraulic valve of the present embodiment works according to the following principle: the pressure oil enters the pressure oil duct 2 from an inlet P of the pressure oil duct 2, and flows to the first oil distribution duct 21 and the second oil distribution duct 22 through the check valve 23; the valve core 4 slides to a working position under the action of pilot oil at two ends, at this time, the first branch oil gallery 21 is communicated with the first working oil gallery 31 through the first throttling groove 41, the second branch oil gallery 22 is communicated with the second working oil gallery 32 through the second throttling groove 42, the pressure oil in the first branch oil gallery 21 is output through the first working oil gallery 31, the pressure oil in the second branch oil gallery 21 is output through the second working oil gallery 32, and the two working oil galleries can simultaneously supply oil.

The first working oil passage 31 and the second working oil passage 32 may be supplied with oil respectively as needed, or may be supplied with oil by merging pressure oil in the two working oil passages 32 by providing an external valve block.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A hydraulic valve, comprising:

the oil-water mixing valve comprises a valve body (1), wherein a pressure oil duct (2) and at least two working oil ducts are formed in the valve body (1);

the valve core (4) is assembled in the valve body (1) in a sliding mode, and the valve core (4) can control the pressure oil duct (2) to be communicated with at least two working oil ducts at the same time in a sliding mode.

2. A hydraulic valve according to claim 1, characterized in that the number of said working oil passages is two, and two said working oil passages are arranged on both sides of said pressure oil passage (2).

3. A hydraulic valve according to claim 2, characterized in that the two working oil passages are symmetrically arranged on both sides of the pressure oil passage (2).

4. A hydraulic valve according to any one of claims 1-3, characterised in that the pressure oil gallery (2) comprises two component oil galleries to which pressure oil entering from an inlet P of the pressure oil gallery is communicated in one way under the influence of a non-return valve (23).

5. The hydraulic valve according to claim 4, wherein the pressure oil passage (2) is of a symmetrical structure, and the valve core (4) can control the two branch oil passages to be respectively communicated with the adjacent working oil passages.

6. The hydraulic valve according to claim 5, wherein the valve core (4) is a rod-shaped body with a variable outer diameter, two throttling grooves are formed on the outer surface of the valve core (4), and the oil distribution passage and the adjacent working oil passage are communicated through the throttling grooves.

7. A hydraulic valve according to claim 1, wherein pilot oil chambers are formed at both axial ends of the spool (4), and the spool (4) slides under the action of the pilot oil at both ends.

8. A hydraulic valve according to claim 7, characterized in that the valve body (1) is provided with a first end cover (61) and a second end cover (62), the first end cover (61) forms a first pilot oil chamber (51), the second end cover (62) forms a second pilot oil chamber (52), and the first pilot oil chamber (51) is provided with an elastic member (7) acting on the valve core (4).

9. The hydraulic valve according to claim 1, wherein a relief valve is provided on the working oil passage.