CN219510177U

CN219510177U - Hydraulic control reversing valve

Info

Publication number: CN219510177U
Application number: CN202320119268.1U
Authority: CN
Inventors: 王俊
Original assignee: Suzhou Jiuben Machinery Manufacturing Co ltd
Current assignee: Suzhou Jiuben Machinery Manufacturing Co ltd
Priority date: 2023-02-06
Filing date: 2023-02-06
Publication date: 2023-08-11
Anticipated expiration: 2033-02-06

Abstract

The utility model provides a hydraulic control reversing valve, which comprises a valve body and a valve core, wherein a valve core cavity is formed in the valve body, the valve core is arranged in the valve core cavity in a sliding manner, a third hole communicated with the valve core cavity is formed in one side of the valve body, a first hole and a second hole communicated with the valve core cavity are formed in the other side of the valve body, a control hole corresponding to the end part of the valve core is formed in one end of the valve body, an end cover is arranged at the other end of the valve body, the interior of the end cover is communicated with the valve core cavity, a stud is connected to the interior of the end cover in a threaded manner, and a spring is arranged between the stud and the valve core; in the utility model, when the control pressure is increased, the stud needs to be screwed to enable the stud to be close to the valve body, the spring is compressed to increase the elasticity of the stud, when the control pressure is reduced, the stud needs to be screwed to enable the stud to be far away from the valve body, and the spring is released to reduce the elasticity of the stud, so that the elasticity can be adaptively adjusted according to the adjustment of the control oil way, and the stud is not required to be replaced and is flexibly applied.

Description

Hydraulic control reversing valve

Technical Field

The utility model belongs to the technical field of reversing valves, and particularly relates to a hydraulic control reversing valve.

Background

The reversing valve is a directional control valve with more than two flow forms and more than two oil ports, and is a valve for realizing communication, cutting-off and reversing of hydraulic oil flow, pressure unloading and sequential action control and is based on the relative movement of a valve core and a valve body.

In the prior hydraulic control system, one end of a valve core is used for limiting the normal position of the valve core by a spring, the other end of the valve core is connected with a control oil way, and the valve core is driven to move by overcoming the elasticity of the spring through the oil pressure in the control oil way. Because the pressure of the control oil way in different hydraulic systems is different, the elasticity of the spring cannot be adjusted, and when the pressure of the control oil way in the hydraulic system is adjusted, reversing valves with different elasticity specifications need to be replaced to be matched with the reversing valves.

Therefore, it is necessary to design a hydraulic control reversing valve with elasticity capable of being adaptively adjusted according to the adjustment of the control oil path without replacement and flexible application to solve the technical problems faced at present.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides the hydraulic control reversing valve which can be adaptively adjusted according to the adjustment of the control oil way, does not need to be replaced and is flexibly applied.

The technical scheme of the utility model is as follows: the hydraulic control reversing valve comprises a valve body and a valve core, wherein a valve core cavity is formed in the valve body, the valve core is arranged in the valve core cavity in a sliding mode, a third hole communicated with the valve core cavity is formed in one side of the valve body, a first hole and a second hole communicated with the valve core cavity are formed in the other side of the valve body, a control hole corresponding to the end portion of the valve core is formed in one end of the valve body, an end cover is arranged at the other end of the valve body, the valve core cavity is communicated with the inner portion of the end cover, a stud is connected to the inner thread of the end cover, and a spring is arranged between the stud and the valve core.

And a locking screw tube is assembled in one end of the end cover, which is opposite to the valve body, and the end part of the locking screw tube is abutted with the end part of the stud.

The locking screw tube is characterized in that an outer hexagonal block is fixedly arranged on the outer side of one end, which is away from the end cover, of the locking screw tube, an inner thread is arranged on the inner side of the end cover, and an outer thread matched with the inner thread is arranged on the outer side of the locking screw tube.

And one end, close to the spring, of the stud is rotatably provided with a rotating head, and the rotating head is abutted with one end of the spring.

The end cover is fixedly connected with the valve body through a fixing bolt.

Sliding sealing rings are arranged on the outer sides of the two ends of the valve core, and the outer sides of the sliding sealing rings are in contact with the valve core cavity.

And a limiting step corresponding to the end part of the valve core is arranged on the inner side of one end, close to the end cover, of the valve core cavity.

A third cavity corresponding to the third hole is formed in the middle of the valve core cavity, and the third hole is communicated with the third cavity; the first cavity and the second cavity are respectively formed in two sides of the third cavity, the first hole is communicated with the first cavity, and the second hole is communicated with the second cavity.

The utility model has the beneficial effects that: in the utility model, when the control oil way connected with the control hole is changed, the control pressure is changed, the elasticity of the spring needs to be adjusted, when the control pressure is increased, the stud needs to be screwed to enable the stud to be close to the valve body, the spring is compressed to increase the elasticity of the stud, when the control pressure is reduced, the stud needs to be screwed to enable the stud to be far away from the valve body, and the spring is released to reduce the elasticity of the stud, so that the elasticity can be adaptively adjusted according to the adjustment of the control oil way, the replacement is not needed, and the spring is flexibly applied.

Drawings

Fig. 1 is a schematic diagram of the external structure of a pilot operated directional control valve according to the present utility model.

Fig. 2 is a schematic diagram of the internal structure of the pilot operated directional control valve according to the present utility model.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the utility model, its application, or uses. The present utility model may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

As shown in fig. 1 and 2, the pilot operated directional control valve comprises a valve body 1 and a valve core 12, wherein a valve core cavity 15 is formed in the valve body 1, the valve core 12 is slidably arranged in the valve core cavity 15, a third hole 6 communicated with the valve core cavity 15 is formed in one side of the valve body 1, a first hole 4 and a second hole 5 communicated with the valve core cavity are formed in the other side of the valve body 1, a control hole 7 corresponding to the end part of the valve core 12 is formed in one end of the valve body 1, an end cover 2 is arranged at the other end of the valve body 1, the interior of the end cover 2 is communicated with the valve core cavity 15, a stud 9 is connected with the interior of the end cover 2 in a threaded manner, and a spring is arranged between the stud 9 and the valve core 11; in this embodiment, the control hole 7 is connected to the control oil path, and when the control oil path is not connected or the pressure is insufficient to overcome the elastic force of the spring 11, the valve core 12 is located at one end inside the valve core cavity 15 near the control hole 7, and at this time, the second hole 5 is communicated with the third hole 6; when the pressure of the control oil way overcomes the elasticity of the spring 11, under the action of oil in the control oil way, the valve core 12 is driven to move to one end close to the end cover 2, and the spring 11 is compressed, and at the moment, the first hole 4 is communicated with the third hole 6; when the control oil path connected with the control hole 7 is changed, the control pressure is changed, the elasticity of the spring 11 needs to be adjusted, when the control pressure is increased, the stud 9 needs to be screwed to enable the stud 9 to be close to the valve body 1, the spring 11 is compressed to increase the elasticity of the stud 9, when the control pressure is reduced, the stud 9 needs to be screwed to enable the stud 9 to be far away from the valve body 1, the spring 11 is released to reduce the elasticity of the stud 9, and therefore the elasticity can be adjusted adaptively according to the adjustment of the control oil path, replacement is not needed, and the valve is flexible to apply.

In some embodiments, a locking screw tube 3 is assembled inside one end of the end cover 2, which is away from the valve body 1, the end of the locking screw tube 3 is abutted against the end of the stud 9, after the elastic force of the stud 9 to the spring 11 is adjusted, the locking screw tube 3 can be screwed, so that the end of the locking screw tube 3 is abutted against the stud 9, and the stud 9 and the end cover 2 are locked through axial force matching with a threaded structure, so that the loosening of the stud 9 in the use process is avoided, and the elastic force of the spring 11 is changed.

In some embodiments, an external hexagonal block 8 is fixedly arranged on the outer side of one end, which is away from the end cover 2, of the locking screw tube 3, the external hexagonal block 8 and the locking screw tube 3 are of an integrated structure, the external hexagonal block 8 is convenient for clamping and rotating the locking screw tube by a spanner, the locking screw tube 9 is locked or released, an internal thread is arranged on the inner side of the end cover 2, and an external thread matched with the internal thread is arranged on the outer side of the locking screw tube 3.

In some embodiments, a rotating head 10 is rotatably arranged on one end of the stud 9 near the spring 11, the rotating head 10 is abutted against one end of the spring 11, but when the stud 9 is rotated, relative rotation occurs between the stud 9 and the rotating head 10, and the rotating head 10 and the spring 11 are kept relatively static, so that abrasion to the spring 11 is avoided when the stud 9 is adjusted.

In some embodiments, the end cover 2 is fixedly connected with the valve body 1 through the fixing bolt 19, an internal threaded hole matched with the fixing bolt 19 is formed in the end part of the valve body 1, the end cover 2 is detachably and fixedly connected with the end part of the valve body 1 through the fixing bolt 19, and the end cover 2 can be detached, so that the maintenance of the inside of the end cover 2 is facilitated.

In some embodiments, the outer sides of the two ends of the valve core 12 are provided with sliding sealing rings 13, the outer sides of the sliding sealing rings 13 are in contact with the inner sides of the valve core cavity 15, and the sealing effect between the valve core 12 and the valve core cavity 15 is improved through the sliding sealing rings 13.

In some embodiments, a limiting step 14 corresponding to the end of the valve core 12 is arranged on the inner side of one end, close to the end cover 2, of the valve core cavity 15, and when the valve core 12 moves towards the end cover 2, the limiting step 14 just forms a blocking for the valve core 12 when the valve core 12 just communicates between the first hole 4 and the third hole 6.

In some embodiments, a third cavity 18 corresponding to the third hole 6 is formed in the middle part of the spool cavity 15, and the third hole 6 is communicated with the third cavity 18; the first cavity 16 and the second cavity 17 are respectively arranged on two sides of the third cavity 18, the first hole 4 is communicated with the first cavity 16, and the second hole 5 is communicated with the second cavity 17.

Thus, various embodiments of the present utility model have been described in detail. In order to avoid obscuring the concepts of the utility model, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

The above examples only represent some embodiments of the utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a hydraulically controlled reversing valve, its characterized in that, includes valve body and case, the valve core chamber has been seted up to the inside of valve body, the case slides and sets up the valve core intracavity portion, one side of valve body be provided with the third hole that the valve core chamber is linked together, the opposite side of valve body be provided with the first hole and the second hole that the valve core chamber is linked together, one end of valve body is provided with the corresponding control hole of case tip, the other end of valve body is provided with the end cover, the inside of end cover with the valve core chamber is linked together, the internal thread connection of end cover has the double-screw bolt, the double-screw bolt with be provided with the spring between the case.

2. The pilot operated directional valve of claim 1, wherein: and a locking screw tube is assembled in one end of the end cover, which is opposite to the valve body, and the end part of the locking screw tube is abutted with the end part of the stud.

3. The pilot operated directional valve of claim 2, wherein: the locking screw tube is characterized in that an outer hexagonal block is fixedly arranged on the outer side of one end, which is away from the end cover, of the locking screw tube, an inner thread is arranged on the inner side of the end cover, and an outer thread matched with the inner thread is arranged on the outer side of the locking screw tube.

4. The pilot operated directional valve of claim 1, wherein: and one end, close to the spring, of the stud is rotatably provided with a rotating head, and the rotating head is abutted with one end of the spring.

5. The pilot operated directional valve of claim 1, wherein: the end cover is fixedly connected with the valve body through a fixing bolt.

6. The pilot operated directional valve of claim 1, wherein: sliding sealing rings are arranged on the outer sides of the two ends of the valve core, and the outer sides of the sliding sealing rings are in contact with the valve core cavity.

7. The pilot operated directional valve of claim 1, wherein: and a limiting step corresponding to the end part of the valve core is arranged on the inner side of one end, close to the end cover, of the valve core cavity.

8. The pilot operated directional valve of claim 1, wherein: a third cavity corresponding to the third hole is formed in the middle of the valve core cavity, and the third hole is communicated with the third cavity; the first cavity and the second cavity are respectively formed in two sides of the third cavity, the first hole is communicated with the first cavity, and the second hole is communicated with the second cavity.