CN221482726U - Hydraulic control reversing valve and hydraulic control system - Google Patents

Abstract

The utility model belongs to the technical field of reversing valves, and particularly discloses a hydraulic control reversing valve and a hydraulic control system. The hydraulic control reversing valve comprises a shell and a valve ball, wherein the shell is provided with a valve cavity, and a liquid inlet, a working port, a liquid return port and a hydraulic control port which are communicated with the valve cavity. The valve ball is arranged in the valve cavity, and the valve ball is in sliding fit with the inner wall of the valve cavity. The valve ball is provided with a first position and a second position, when the hydraulic pressure of the hydraulic control port is smaller than the preset pressure, the valve ball is positioned at the first position, the liquid inlet is communicated with the working port, and the working port is disconnected from the liquid return port; when the hydraulic pressure of the hydraulic control port is greater than the preset pressure, the valve ball is located at the second position, the liquid inlet and the working port are disconnected, and the working port and the liquid return port are communicated. The utility model can prolong the service life.

Description

Hydraulic control reversing valve and hydraulic control system

Technical Field

The utility model belongs to the technical field of reversing valves, and in particular relates to a hydraulically controlled reversing valve and a hydraulically controlled system.

Background technique

The reversing valve is a directional control valve with more than two flow forms and more than two oil ports. It is a valve that realizes the circulation, cutting and reversing of hydraulic oil, as well as pressure unloading and sequential action control. The hydraulically controlled reversing valve is a reversing valve operated by the pilot fluid pressure. When the valve core moves a certain distance to the right, the pressure oil output by the hydraulic pump flows to the left chamber of the hydraulic cylinder, the oil in the right chamber of the hydraulic cylinder flows back to the oil tank, and the hydraulic cylinder piston moves to the right; conversely, if the valve core moves a certain distance to the left, the fluid flow reverses and the piston moves to the left. The hydraulically controlled reversing valve in the related art generally realizes the valve port switching by moving the valve stem and cooperating with the valve stem and the valve seat. The valve stem is prone to wear during the movement, which will reduce the sealing effect and service life.

Summary of the invention

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the utility model provides a hydraulically controlled reversing valve, which can increase the service life.

The embodiment of the utility model also provides a hydraulic control system.

The hydraulically controlled reversing valve of the embodiment of the utility model comprises: a shell having a valve cavity and a liquid inlet, a working port, a liquid return port and a hydraulic control port connected to the valve cavity; a valve ball, the valve ball is arranged in the valve cavity, and the valve ball and the inner wall of the valve cavity are slidably matched; the valve ball has a first position and a second position, when the hydraulic pressure of the hydraulic control port is less than a preset pressure, the valve ball is located at the first position, the liquid inlet and the working port are connected, and the working port and the liquid return port are disconnected; when the hydraulic pressure of the hydraulic control port is greater than the preset pressure, the valve ball is located at the second position, the liquid inlet and the working port are disconnected, and the working port and the liquid return port are connected.

In this embodiment, the position of the valve ball is controlled by the hydraulic pressure of the hydraulic control port. When the hydraulic pressure of the hydraulic control port is less than the preset pressure, the valve ball is located at the first position, the liquid inlet and the working port are connected, the liquid entering from the liquid inlet can flow out from the working port, and the working port and the liquid return port are disconnected. When the hydraulic pressure of the hydraulic control port is greater than the preset pressure, the valve ball is located at the second position, the liquid inlet and the working port are disconnected, the working port and the liquid return port are connected, and the liquid at the liquid inlet cannot enter, thereby meeting the use requirements in different states. The valve ball is used to control the circulation, cutting off and reversing of the liquid, and the direction of the valve ball is changed by rolling the valve ball, so that the flow of the liquid is controlled by using different positions of the valve ball, which can reduce the wear of the local position of the valve ball and increase the service life.

In this embodiment, the shell includes a first end cover, a valve seat assembly, and a second end cover connected in sequence, the first end cover has a first chamber, the valve seat assembly has a second chamber, the second end cover has a third chamber, and the first chamber, the second chamber and the third chamber together form the valve chamber.

In this embodiment, the liquid inlet is arranged on the first end cover, the working port is arranged on the valve seat assembly, and the liquid return port and the liquid control port are both arranged on the second end cover.

In this embodiment, the second chamber has a first section, a second section and a third section arranged in sequence along the central axis direction thereof, the valve ball is arranged in the second section, and the aperture of the second section is larger than the apertures of the first section and the third section.

In this embodiment, the valve seat assembly includes: a first valve seat, one end of which is connected to the first end cover, and the first valve seat has the first section; a second valve seat, the second valve seat is arranged between the first valve seat and the second end cover, the second valve seat has the third section, the second section is formed between the first valve seat and the second valve seat, the valve ball is arranged in the second section, the working port is arranged on the side wall of the second section, and the working port is connected to the second section.

In this embodiment, the valve seat assembly further includes a gasket, which is disposed between the first valve seat and the second valve seat, and has the second section, and the working port is disposed on the gasket.

In this embodiment, the hydraulically controlled reversing valve also includes: a first valve stem and a second valve stem, the first valve stem and the second valve stem are arranged in the valve cavity along the axial direction of the valve cavity, and the first valve stem and the second valve stem are both slidably matched with the inner wall of the valve cavity, the first valve stem and the second valve stem are located on both sides of the valve ball, and one end of the second valve stem away from the valve ball is connected to the hydraulic control port; an elastic member, one end of the elastic member abuts against the inner wall of the valve cavity, and the other end of the elastic member abuts against the first valve stem, and the first valve stem and the valve ball abut.

In this embodiment, the hydraulically controlled reversing valve further includes a first sealing ring, a first sealing groove is circumferentially formed on the outer wall of the second valve stem, and the first sealing ring is disposed in the first sealing groove.

In this embodiment, the hydraulically controlled reversing valve further includes a sealing component, and the sealing component is disposed on the outer wall of the shell.

A hydraulic control system comprises the above hydraulic control reversing valve.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a hydraulically controlled reversing valve according to an embodiment of the present utility model.

Reference numerals:

1. Shell; 11. Valve cavity; 12. Liquid inlet; 13. Working port; 14. Liquid return port; 15. Liquid control port; 16. First end cover; 17. Valve seat assembly; 171. First valve seat; 172. Second valve seat; 173. Spacer; 18. Second end cover; 2. Valve ball; 3. First valve stem; 4. Second valve stem; 5. Elastic member; 6. First sealing ring; 7. Sealing assembly.

Detailed ways

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

As shown in FIG1 , the hydraulically controlled reversing valve in this embodiment includes a housing 1 and a valve ball 2. The housing 1 has a valve cavity 11 and a liquid inlet 12, a working port 13, a liquid return port 14 and a hydraulic control port 15 connected to the valve cavity 11. The valve ball 2 is arranged in the valve cavity 11, and the valve ball 2 and the inner wall of the valve cavity 11 are slidably matched. The valve ball 2 has a first position and a second position. When the hydraulic pressure of the hydraulic control port 15 is less than the preset pressure, the valve ball 2 is located in the first position, the liquid inlet 12 is connected to the working port 13, and the working port 13 is disconnected from the liquid return port 14; when the hydraulic pressure of the hydraulic control port 15 is greater than the preset pressure, the valve ball 2 is located in the second position, the liquid inlet 12 and the working port 13 are disconnected, and the working port 13 is connected to the liquid return port 14.

Specifically, the hydraulically controlled reversing valve in this embodiment is a two-position three-way reversing valve. The hydraulic pressure of the hydraulic control port 15 is less than the preset pressure, including the situation that the hydraulic control port 15 has no hydraulic pressure.

In this embodiment, the position of the valve ball 2 is controlled by the hydraulic pressure of the hydraulic control port 15. When the hydraulic pressure of the hydraulic control port 15 is less than the preset pressure, the valve ball 2 is located in the first position, the liquid inlet 12 and the working port 13 are connected, and the liquid entering from the liquid inlet 12 can flow out from the working port 13, and the working port 13 and the return liquid port 14 are disconnected. When the hydraulic pressure of the hydraulic control port 15 is greater than the preset pressure, the valve ball 2 is located in the second position, the liquid inlet 12 and the working port 13 are disconnected, the working port 13 and the return liquid port 14 are connected, and the liquid at the liquid inlet 12 cannot enter, thereby meeting the use requirements in different states. The valve ball 2 is used to control the circulation, cutting and reversing of the liquid, and the direction of the valve ball 2 is changed by rolling the valve ball 2, so as to control the flow of the liquid by using different positions of the valve ball 2, which can reduce the wear of the local position of the valve ball 2 and increase the service life.

In this embodiment, as shown in Figure 1, the shell 1 includes a first end cover 16, a valve seat assembly 17, and a second end cover 18 which are connected in sequence. The first end cover 16 has a first chamber, the valve seat assembly 17 has a second chamber, and the second end cover 18 has a third chamber. The first chamber, the second chamber and the third chamber together form a valve chamber 11.

The first chamber is processed on the first end cover 16, the second chamber is processed on the valve seat assembly 17, and the third chamber is processed on the second end cover 18. The first chamber, the second chamber and the third chamber are assembled into a valve chamber 11. The split processing method is adopted to facilitate the processing of the shell 1.

In this embodiment, the liquid inlet 12 is disposed on the first end cover 16 , the working port 13 is disposed on the valve seat assembly 17 , and the liquid return port 14 and the liquid control port 15 are both disposed on the second end cover 18 .

Specifically, the liquid inlet 12 is arranged on the first end cover 16, and the liquid inlet 12 is connected to the first chamber, the working port 13 is arranged on the valve seat assembly 17, and the working port 13 is connected to the second chamber, the liquid return port 14 and the hydraulic control port 15 are both arranged on the second end cover 18, and the liquid return port 14 and the hydraulic control port 15 are both connected to the third chamber. The liquid return port 14 is arranged on the side wall of the third chamber, and the hydraulic control port 15 is arranged on the side wall of the third chamber away from the second chamber.

By arranging the liquid inlet 12 on the first end cover 16, the working port 13 on the valve seat assembly 17, and the return liquid port 14 and the hydraulic control port 15 on the second end cover 18, the positional arrangement of the liquid inlet 12, the working port 13, the return liquid port 14 and the hydraulic control port 15 can be facilitated, thereby reducing the volume of a single component.

In this embodiment, as shown in FIG. 1 , the second chamber has a first section, a second section and a third section arranged in sequence along its central axis, the valve ball 2 is arranged in the second section, and the aperture of the second section is larger than the apertures of the first section and the third section.

It should be noted that when the valve ball 2 is located at the first position, the valve ball 2 blocks the third section, and when the valve ball 2 is located at the second position, the valve ball 2 blocks the first section. The aperture of the second section is larger than the apertures of the first section and the third section, and the valve ball 2 is arranged in the second section. The valve ball 2 can slide along the second section. When the valve ball 2 slides toward the first section and blocks the first section, the working port 13 can be connected to the third section, and the third section is connected to the third chamber. Since the third chamber is connected to the liquid return port 14, the working port 13 is connected to the liquid return port 14; when the valve ball 2 slides toward the third section and blocks the third section, the working port 13 can be connected to the first section, and the first section is connected to the first chamber. Since the first chamber is connected to the liquid inlet 12, the working port 13 is connected to the liquid inlet 12.

In this embodiment, as shown in FIG. 1 , the valve seat assembly 17 includes a first valve seat 171 and a second valve seat 172. One end of the first valve seat 171 is connected to the first end cover 16. The first valve seat 171 has a first section. The second valve seat 172 is disposed between the first valve seat 171 and the second end cover 18. The second valve seat 172 has a third section. A second section is formed between the first valve seat 171 and the second valve seat 172. The valve ball 2 is disposed in the second section. The working port 13 is disposed on the side wall of the second section, and the working port 13 is connected to the second section.

Specifically, the first section is the center hole of the first valve seat 171 , the third section is the center hole of the second valve seat 172 , and the center axis of the second section coincides with the center axes of the first section and the third section.

For example, the first valve seat 171 and the second valve seat 172 may be arranged symmetrically. Of course, the first valve seat 171 and the second valve seat 172 may also be asymmetrical, and those skilled in the art may select the arrangement of the first valve seat 171 and the second valve seat 172 as required.

By setting the first section on the first valve seat 171, setting the third section on the second valve seat 172, and forming the third section between the first valve seat 171 and the second valve seat 172, the first chamber, the first section, and the second section can form a channel connecting the liquid inlet 12 and the working port 13, and the third chamber, the third section, and the second section can form a channel connecting the working port 13 and the liquid return port 14. The setting of the first valve seat 171 and the second valve seat 172 can facilitate the processing of the first section, the second section, and the third section.

In this embodiment, as shown in FIG. 1 , the valve seat assembly 17 further includes a cushion block 173 . The cushion block 173 is disposed between the first valve seat 171 and the second valve seat 172 . The cushion block 173 has a second section. The working port 13 is disposed on the cushion block 173 .

For example, the second section may be the center hole on the cushion block 173. A groove may be machined on the end face of the cushion block 173 so that the cushion block 173 and the first valve seat 171 or the second valve seat 172 may be combined to form the working port 13. Of course, the working port 13 may also be machined in the middle of the cushion block 173. The processing method of the working port 13 may be selected by technicians in this field as needed and is not limited here. A groove may also be machined on the end face of the second valve seat 172 facing the cushion block 173 so that the second valve seat 172 and the cushion block 173 may be combined to form the liquid return port 14. Similarly, the liquid return port 14 may also be machined in the middle of the second valve seat 172. The processing method of the liquid return port 14 may be selected by technicians in this field as needed and is not limited here.

It is understandable that a cushion block 173 is provided between the first valve seat 171 and the second valve seat 172 , and the second section is provided on the cushion block 173 , which can facilitate the processing of the second section and also reduce the processing steps of the first valve seat 171 and the second valve seat 172 .

In this embodiment, as shown in FIG1 , the hydraulically controlled reversing valve further includes a first valve stem 3, a second valve stem 4, and an elastic member 5. The first valve stem 3 and the second valve stem 4 are arranged in the valve cavity 11 along the axial direction of the valve cavity 11, and the first valve stem 3 and the second valve stem 4 are both slidably matched with the inner wall of the valve cavity 11. The first valve stem 3 and the second valve stem 4 are located on both sides of the valve ball 2, and one end of the second valve stem 4 away from the valve ball 2 is connected to the hydraulic control port 15. One end of the elastic member 5 abuts against the inner wall of the valve cavity 11, and the other end of the elastic member 5 abuts against the first valve stem 3, and the first valve stem 3 abuts against the valve ball 2.

For example, the elastic member 5 may be a spring. Those skilled in the art may also select the form of the elastic member 5 as required, which is not limited here.

Specifically, the elastic member 5 and the first valve stem 3 are sequentially arranged in the first chamber, the middle part of the first valve stem 3 and the inner wall of the first chamber are slidably matched, under the elastic force of the elastic member 5, the first valve stem 3 and the valve ball 2 are abutted, the second valve stem 4 is arranged in the third chamber, and the end of the second valve stem 4 away from the valve ball 2 is slidably matched with the inner wall of the third chamber

It can be understood that when the hydraulic pressure of the hydraulic control port 15 is less than the preset pressure, under the elastic force of the elastic member 5, the first valve stem 3 will push the valve ball 2 to the first position, and the liquid inlet 12 and the working port 13 are connected. When the hydraulic pressure of the hydraulic control port 15 is greater than the preset pressure, the pressure of the hydraulic control port 15 can overcome the elastic force of the elastic member 5, push the second valve stem 4 to move toward the valve ball 2, and push the valve ball 2 to the second position, so that the working port 13 and the return liquid port 14 are connected.

In this embodiment, the hydraulically controlled reversing valve further includes a first sealing ring 6 , a first sealing groove is circumferentially formed on the outer wall of the second valve stem 4 , and the first sealing ring 6 is disposed in the first sealing groove.

For example, the first sealing ring 6 may be a rubber sealing ring.

By not necessarily setting a sealing ring on the second valve stem 4, the sealing effect between the second valve stem 4 and the inner wall of the third cavity can be better, so that the liquid at the liquid control port 15 cannot enter the valve cavity 11, so that the reversing valve can work reliably.

In this embodiment, the hydraulically controlled reversing valve further includes a sealing assembly 7 , and the sealing assembly 7 is disposed on the outer wall of the housing 1 .

For example, the sealing group assembly includes a second sealing ring, a third sealing ring, a fourth sealing ring, and a fifth sealing ring. The outer wall of the first end cover 16 is provided with a second sealing groove in the circumferential direction, and the second sealing ring is arranged in the second sealing groove. The outer wall of the first valve seat 171 is provided with a third sealing groove in the circumferential direction, and the third sealing ring is arranged in the third sealing groove. The outer wall of the second valve seat 172 is provided with a fourth sealing groove in the circumferential direction, and the fourth sealing ring is arranged in the fourth sealing groove. The outer wall of the second end cover 18 is provided with a fifth sealing ring, and the fifth sealing ring is arranged in the fifth sealing groove. Of course, those skilled in the art can set the form of the sealing assembly 7 as needed, and it is not limited here.

It is understandable that the sealing assembly 7 is provided on the outer wall of the housing 1 so that the housing 1 can have a better sealing effect with other components when connected with other components.

This embodiment also provides a hydraulic control system, which includes the above-mentioned hydraulic control reversing valve.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims (10)

1. A hydraulically controlled reversing valve, comprising:

the shell is provided with a valve cavity, a liquid inlet, a working port, a liquid return port and a liquid control port, wherein the liquid inlet, the working port, the liquid return port and the liquid control port are communicated with the valve cavity;

the valve ball is arranged in the valve cavity, and the valve ball is in sliding fit with the inner wall of the valve cavity;

The valve ball is provided with a first position and a second position, when the hydraulic pressure of the hydraulic control port is smaller than the preset pressure, the valve ball is positioned at the first position, the liquid inlet is communicated with the working port, and the working port is disconnected with the liquid return port; when the hydraulic pressure of the hydraulic control port is greater than the preset pressure, the valve ball is located at the second position, the liquid inlet is disconnected from the working port, and the working port is communicated with the liquid return port.

2. The pilot operated directional valve of claim 1, wherein the housing comprises a first end cap, a valve seat assembly, and a second end cap connected in sequence, the first end cap having a first chamber, the valve seat assembly having a second chamber, the second end cap having a third chamber, the first chamber, the second chamber, and the third chamber surrounding the valve chamber.

3. The pilot operated directional control valve of claim 2 characterized in that said inlet is disposed in said first end cap, said working port is disposed in said valve seat assembly, and said return port and said pilot operated port are both disposed in said second end cap.

4. The pilot operated directional control valve as set forth in claim 2 wherein said second chamber has a first section, a second section and a third section disposed in sequence along a central axis thereof, said valve ball being disposed in said second section, said second section having a larger aperture than said first section and said third section.

5. The pilot operated directional valve of claim 4, wherein the valve seat assembly comprises:

A first valve seat, one end of which is connected with the first end cover, the first valve seat having the first section;

The second valve seat is arranged between the first valve seat and the second end cover, the third section is arranged in the second valve seat, the second section is formed between the first valve seat and the second valve seat, the valve ball is arranged in the second section, the working port is arranged on the side wall of the second section, and the working port is communicated with the second section.

6. The pilot operated directional valve of claim 5, wherein the valve seat assembly further comprises a spacer disposed between the first valve seat and the second valve seat, the spacer having the second segment, the working port being disposed on the spacer.

7. The hydraulically operated switching valve of claim 1, further comprising:

The first valve rod and the second valve rod are arranged in the valve cavity along the axial direction of the valve cavity, the first valve rod and the second valve rod are in sliding fit with the inner wall of the valve cavity, the first valve rod and the second valve rod are positioned on two sides of the valve ball, and one end, far away from the valve ball, of the second valve rod is communicated with the hydraulic control port;

and one end of the elastic piece is abutted to the inner wall of the valve cavity, the other end of the elastic piece is abutted to the first valve rod, and the first valve rod is abutted to the valve ball.

8. The pilot operated directional control valve of claim 7, further comprising a first seal ring, wherein a first seal groove is circumferentially defined in an outer wall of the second valve stem, and wherein the first seal ring is disposed within the first seal groove.

9. The pilot operated directional valve of any one of claims 1 to 8, further comprising a seal assembly disposed on an outer wall of the housing.

10. A pilot operated system comprising a pilot operated directional valve as claimed in any one of claims 1 to 9.