Slide valve

Abstract

The present disclosure relates to a spool valve. The sliding valve comprises a valve body, a valve element and a reset spring, and a valve cavity, a working valve port and a control valve port are formed in the valve body; the valve element is arranged in the valve cavity in a sliding mode, and the valve cavity is divided into a working cavity and a control cavity. The reset spring is arranged in the control cavity and pre-pressed between the end face of the valve element and the valve body, so that when the pressure of a medium entering the control cavity through the control valve port is smaller than or equal to the pre-tightening force of the reset spring, the valve element blocks the working valve port, or when the pressure of the medium is larger than the pre-tightening force of the reset spring, the valve element blocks the working valve port. The elastic force of the reset spring is overcome to push the valve core to slide to open the working valve port; the valve element is provided with at least one driving groove, and the driving groove is configured to drive the valve element to rotate around the axis under the action of medium pressure. By the adoption of the sliding valve, the valve element can do axial reciprocating motion in the valve cavity and can also do rotating motion around the axis of the valve element in the valve cavity, and the friction stress state of the valve element is changed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of control valves, and in particular to a sliding valve. Background Art

[0002] Sliding valve is a common component in fluid control systems, used to control the flow direction, pressure or flow of fluids (such as gas or liquid). The valve cavity of the sliding valve is equipped with a valve core, which can make linear reciprocating motion in the valve cavity. The change of the position of the valve core in the valve cavity hole changes the connection or disconnection relationship between the various channels of the valve body, realizes the transmission of the medium in different pipelines, and uses the pressure energy of the medium to drive the actuator to work. Sliding valves are widely used in hydraulic systems, pneumatic systems, automatic control and other fields.

[0003] The existing sliding valve core mainly performs linear reciprocating motion with little rotational motion. The friction surface of the valve core and the valve cavity does not change under normal circumstances. The friction surface of the parts is prone to wear, making the annular gap between the valve core and the valve cavity uneven, which in turn leads to increased medium leakage. The valve core is also prone to getting stuck, reducing the reliability of the valve and affecting the service life of the product. Summary of the invention

[0004] The purpose of the present disclosure is to overcome the deficiencies of the prior art and provide a sliding valve.

[0005] According to a first aspect of the present disclosure, a sliding valve is provided, the sliding valve comprising: A valve body, wherein a valve cavity, a working valve port and a control valve port are arranged in the valve body; A valve core, the valve core is slidably disposed in the valve cavity to separate the valve cavity into a working cavity and a control cavity; A return spring, the return spring is arranged in the control cavity and pre-tightened between the end face of the valve core and the valve body, so that when the pressure of the medium entering the control cavity through the control valve port is less than or equal to the pre-tightening force of the return spring, the valve core blocks the working valve port, or when the medium pressure is greater than the pre-tightening force of the return spring, the elastic force of the return spring is overcome to push the valve core to slide to open the working valve port; The valve core is provided with at least one driving groove, and the driving groove is configured to drive the valve core to rotate around an axis under the action of medium pressure.

[0006] In one embodiment of the present disclosure, the drive groove includes a first drive groove, which is arranged on the end face of the valve core located in the control chamber, and the first drive groove has two groove walls extending radially and arranged opposite to each other, and the area of ​​one of the two groove walls is larger than the area of ​​the other groove wall.

[0007] In one embodiment of the present disclosure, at least two first driving grooves are formed on the end surface of the valve core located in the control cavity, and the at least two first driving grooves are sequentially spaced apart in the circumferential direction around the center of the valve core.

[0008] In one embodiment of the present disclosure, in the radial cross section of the valve core, the projection of the first driving groove is fan-shaped.

[0009] In one embodiment of the present disclosure, in a projection of the valve core in an axial plane, an inclination angle α of the first driving groove relative to the axis of the valve core is 75-85°.

[0010] In one embodiment of the present disclosure, the valve core includes a first shaft segment and a second shaft segment which are continuously arranged along the axial direction, and a diameter of the first shaft segment is smaller than a diameter of the second shaft segment.

[0011] In one embodiment of the present disclosure, the valve core includes a valve stem and a sealing flange radially protruding on the valve stem, the sealing flange is constructed to seal the working valve port, and the drive groove includes a second drive groove, the second drive groove is arranged on the sealing flange, and the second drive groove starts from the end face of the sealing flange facing the working valve port and extends obliquely to the peripheral wall of the sealing flange.

[0012] In one embodiment of the present disclosure, a projected area of ​​the second driving groove in the axial plane of the valve core is divided into two parts relative to the axis, and an area of ​​one of the two parts is larger than the other.

[0013] In one embodiment of the present disclosure, the blocking flange is provided with at least two second driving grooves, and the at least two second driving grooves are arranged in sequence and spaced apart in the circumferential direction around the center of the blocking flange.

[0014] In one embodiment of the present disclosure, in an axial cross section of the valve core, a projection of the second driving groove is triangular.

[0015] In one embodiment of the present disclosure, in a projection of the valve core in an axial plane, an inclination angle β of the second driving groove relative to the axis of the valve core is 15-20°.

[0016] One beneficial effect of the sliding valve disclosed in the present invention is that, by adopting the sliding valve disclosed in the present invention, the valve core can not only perform axial reciprocating motion in the valve cavity to realize normal switching of different working valve ports, but also, the medium enters the valve cavity and acts on the driving groove on the surface of the valve core, so that the pressure of the medium on the valve core along the circumference is uneven, and the pressure generates torque on the valve core, driving the valve core to perform rotational motion around the axis of the valve core in the valve cavity, thereby changing the friction force state of the valve core, and the friction between the valve core and the valve cavity is uniform in all directions, and the valve core and the valve cavity will not be damaged by repeated friction at the same position, thereby improving the service life of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] Figure 1 is a partial cross-sectional schematic diagram of a slide valve provided in one embodiment of the present disclosure; Figure 2 is a partial cross-sectional schematic diagram of a valve core provided in an embodiment of the present disclosure; Figure 3 yes Figure 2 Schematic diagram of the cross section of the middle valve core along the AA direction; Figure 4 It is a cross-sectional schematic diagram of a sealing flange of a valve core provided in one embodiment of the present disclosure.

[0019] Figure 1-Figure 4 The one-to-one correspondence between the component names and the reference numerals is as follows: Valve chamber: 11-working chamber; 12-control chamber; Valve core: 21-valve stem; 211-first driving groove; 212-first shaft section; 213-second shaft section; 22-sealing flange; 221-second driving groove; 3-Return spring; 4-Control lever. DETAILED DESCRIPTION

[0020] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0021] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0022] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0023] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0024] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0025] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0026] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0027] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0028] In this article, when an observer faces the slide valve, the observer's left hand side is the left, and the observer's right hand side is the right. The axis extension direction of the valve core is the axial direction, and the diameter direction of the valve core cross section is the radial direction.

[0029] The existing sliding valve core mainly performs linear reciprocating motion and rarely performs rotational motion. The friction surface between the valve core and the valve cavity is easily worn, resulting in increased leakage of the medium. To this end, the present invention provides a sliding valve with an actively rotatable valve core.

[0030] For ease of understanding, refer to Figure 1-Figure 4 , the specific structure and working principle of the present invention are described in detail in combination with embodiments.

[0031] In one embodiment, the sliding valve includes: a valve body, a valve core, and a reset spring 3, wherein a valve cavity, a working valve port, and a control valve port are arranged in the valve body; the valve core is slidably arranged in the valve cavity to divide the valve cavity into a working cavity 11 and a control cavity 12; the reset spring 3 is arranged in the control cavity 12 and is pre-tightened between the end face of the valve core and the valve body, so that when the pressure of the medium entering the control cavity 12 through the control valve port is less than or equal to the pre-tightening force of the reset spring 3, the valve core blocks the working valve port, or when the medium pressure is greater than the pre-tightening force of the reset spring 3, the elastic force of the reset spring 3 is overcome to push the valve core to slide to open the working valve port; the valve core is provided with at least one driving groove, and the driving groove is configured to drive the valve core to rotate around the axis under the action of the medium pressure.

[0032] Specifically, refer to Figure 1 , Figure 2, the valve body includes two working valve ports A and B, the central oil inlet valve port P and the control valve port. When the sliding valve is in a non-working state, the valve core blocks the two working valve ports A and B respectively, and at the same time, the valve core divides the valve cavity as a whole into three chambers, namely the middle working chamber 11 and the control chambers 12 on both sides. A reset spring 3 is arranged in the control chamber 12, and the reset spring 3 is pre-tightened between the end face of the valve core and the valve body. The control chamber 12 on the left is hydraulically controlled, and the control chamber 12 on the right is electromagnetically controlled. The working chamber 11 is connected to the oil inlet valve port P, and the medium is discharged through one of the working valve ports A and B. The control valve port and the oil inlet valve port P share a valve port, and the control chamber 12 is connected to the control valve port through the control channel C.

[0033] Working principle of electromagnetic control: In the control chamber 12 on the right side, a control rod 4 is axially arranged. The control rod 4 is an iron core. Under the action of the magnetic field generated by the energized coil, it can reciprocate along the axial direction. When the magnetic field generated by the energized coil causes the control rod 4 to move to the left, the control rod 4 pushes the valve core to overcome the preload force of the left return spring 3 and move axially to the left. The valve core opens the working valve port A, and the working valve port A is connected with the oil inlet valve port P through the working chamber 11. The medium of the oil inlet valve port P flows out from the working valve port A through the working chamber 11. After the work is completed, the control rod 4 moves to the right under the action of the magnetic field of the energized coil, and the valve core moves to the right to restore the initial state under the action of the elastic force of the return spring 3, blocking the two working valve ports A and B.

[0034] Hydraulic control working principle: After the medium enters the control chamber 12 on the left side through the control valve port C, the pressure of the medium gradually increases. When the medium pressure is greater than the preload of the right return spring 3, the medium pushes the valve core to move axially to the right, and the valve core opens the working valve port B, while still blocking the working valve port A. The working valve port B is connected to the oil inlet valve port P through the working chamber 11, and the medium at the oil inlet valve port P flows out from the working valve port B through the working chamber 11.

[0035] When the A and B working valve ports need to be switched, the medium in the control chamber 12 pushes the valve core to make axial reciprocating motion in the valve chamber. If the valve core rarely rotates, the friction between the valve core and the valve chamber will cause wear, and the wear position will rarely change, which will lead to increased leakage of the medium, affect the normal working performance of the valve body, and reduce the service life of the valve body.

[0036] The surface of the valve core is provided with at least one driving groove. The structure of the driving groove makes the pressure state of the medium on the valve core in all directions unbalanced, especially the pressure on the valve core along the circumferential direction. Therefore, when the medium enters the valve cavity and acts on the driving groove, it gives the valve core a force to rotate around the axis. The valve core rotates circumferentially while moving axially, so that the valve core and the valve cavity rub evenly, reducing the friction damage between the valve core and the valve cavity.

[0037] It should be noted that the valve core disclosed in the present invention can be applied to any sliding valve structure, and the sliding valve structure in this embodiment is only used to illustrate the principle.

[0038] When the sliding valve is adopted, the valve core can not only perform axial reciprocating motion in the valve cavity to realize normal switching of the working valve ports A and B, but also, the medium enters the valve cavity and acts on the driving groove on the surface of the valve core, so that the pressure of the medium on the valve core along the circumference is uneven. The pressure generates torque on the valve core, driving the valve core to perform rotational motion around the axis of the valve core in the valve cavity, thereby changing the friction force state of the valve core. The friction between the valve core and the valve cavity is uniform in all directions, and the valve core and the valve cavity will not be damaged by repeated friction at the same position, thereby improving the service life of the valve body.

[0039] In one embodiment, the drive groove includes a first drive groove 211, which is arranged on the end face of the valve core located in the control chamber 12. The first drive groove 211 has two groove walls extending radially and arranged opposite to each other, and the area of ​​one of the two groove walls is larger than the area of ​​the other groove wall.

[0040] Specifically, at least one first driving groove 211 is provided on the end surface of the end of the valve core located in the control chamber 12. The first driving groove 211 extends radially and the areas of the two groove walls arranged opposite to each other are unequal, that is, the groove surface of the first driving groove 211 is inclined relative to the radial direction, and the inclination angle β is 15-20°. When the medium enters the control chamber 12, the medium impacts the groove walls of unequal areas. The pressure on the groove wall with a larger area is smaller, while the pressure on the groove wall with a smaller area is concentrated and larger. The combined force of the two pressures generates torque on the valve core, causing the valve core to rotate circumferentially. The valve core rotates circumferentially while moving axially, so that the valve core and the valve chamber rub evenly, reducing the friction damage between the valve core and the valve chamber. The rotation direction of the valve core does not need to be limited, and there is no need to change direction, as long as the valve core rotates under the push of the medium.

[0041] In one embodiment, at least two first driving grooves 211 are formed on the end surface of the valve core located in the control chamber 12 , and the at least two first driving grooves 211 are sequentially spaced apart in the circumferential direction around the center of the valve core.

[0042] Specifically, refer to Figure 2, the combined force of the medium on the groove walls of unequal areas drives the valve core to rotate, but if there is only one first driving groove 211, the impact of the medium on the inclined lower groove surface of the first driving groove 211 makes the valve core tend to move radially outward, so the rotation of the valve core in the valve cavity is not stable enough. At least two first driving grooves 211 are arranged on the end surface of the valve core. Taking two first driving grooves 211 as an example, if the two first driving grooves 211 are symmetrically arranged along the center of the valve core, the pressure directions of the medium on the two first driving grooves 211 are opposite, and the two pressures are not on the same straight line, then the tendency of the valve core to move radially outward is offset, and the valve core can rotate smoothly around the axis of the valve core. In addition, at least two first driving grooves 211 are arranged in sequence along the circumferential direction around the center of the valve core at the edge of the valve core end face. Since the pressure of the medium on the first driving groove 211 as a whole is affected by the groove wall area, the larger the groove wall area, the greater the pressure of the medium on the at least two first driving grooves 211 as a whole. The first driving groove 211 is arranged at the edge of the valve core end face, which can expand the groove wall area as much as possible to realize the rotational movement of the valve core under the medium pressure.

[0043] In one embodiment, in the radial cross section of the valve core, the projection of the first driving groove 211 is fan-shaped.

[0044] Specifically, since the first drive groove 211 is arranged at intervals in the circumferential direction around the center of the valve core, the fan-shaped cross-sectional structure can maximize the area of ​​the first drive groove 211. The larger the area of ​​the first drive groove 211, the greater the pressure of the medium on the first drive groove 211 as a whole, and the valve core can be driven to rotate better. The fan-shaped edge coincides with the edge of the valve core, so that the first drive groove 211 is arranged at the edge of the end face of the valve core, which can also increase the area of ​​the first drive groove 211.

[0045] In one embodiment, in the projection in the axial plane of the valve core, the inclination angle α of the first driving groove 211 relative to the axis of the valve core is 75-85°.

[0046] Specifically, the inclination angle α of the first driving groove 211 relative to the axis of the valve core, that is, the inclination angle α between the lower groove surface of the first driving groove 211 and the axis of the valve core is 75-85°. As the inclination angle α increases, the difference between the two groove wall areas of the first driving groove 211 decreases, and the circumferential torque generated by the medium on the first driving groove 211 decreases. As the inclination angle α decreases, the groove depth increases, and the axial length of the end of the valve stem 21 needs to be increased, thereby increasing the volume of the valve body. Therefore, preferably, the inclination angle α of the first driving groove 211 relative to the axis of the valve core is 75-85°.

[0047] In one embodiment, the valve core includes a first shaft segment 212 and a second shaft segment 213 which are continuously arranged along the axial direction, and the diameter of the first shaft segment 212 is smaller than the diameter of the second shaft segment 213 .

[0048] Specifically, refer to Figure 2 The first driving groove 211 is arranged on the end face of the second shaft section 213, and the area of ​​the first driving groove 211 can also be increased to increase the pressure of the medium on the first driving groove 211 as a whole, and at the same time increase the impact area of ​​the medium on the end face. The radially extending end face can play a guiding role, ensuring that the valve core maintains a straight line motion during the movement process to avoid deviation.

[0049] In one embodiment, the valve core includes a valve stem 21 and a sealing flange 22 radially protruding on the valve stem 21, the sealing flange 22 is constructed to seal the working valve port, and the driving groove includes a second driving groove 221, the second driving groove 221 is arranged on the sealing flange 22, and the second driving groove 221 starts from the end face of the sealing flange 22 facing the working valve port side and extends obliquely to the peripheral wall of the sealing flange 22.

[0050] Specifically, refer to Figure 2 The valve core is composed of a valve stem 21 and two sealing flanges 22 radially protruding from the valve stem 21. The two sealing flanges 22 respectively seal the two working valve ports A and B. The axial length of the sealing flange 22 is greater than the diameter of the working valve ports A and B. The distance that the sealing flange 22 on the left side exceeds the left side of the working valve port A is greater than the distance that exceeds the right side of the working valve port A. The distance that the sealing flange 22 on the right side exceeds the left side of the working valve port B is less than the distance that exceeds the right side of the working valve port B. That is, when the valve core moves to the right to open the working valve port B, the sealing flange 22 on the left side still seals the working valve port A. Similarly, when the valve core moves to the left to open the working valve port A, the sealing flange 22 on the right side still seals the working valve port B. The two sealing flanges 22 divide the valve stem 21 into a central annular oil groove and the ends of the valve stem 21 on both sides. The annular oil groove is connected to the oil inlet valve port P. When the valve core moves to communicate with one of the working valve ports A and B, the oil inlet valve port P is connected to the working valve ports A and B through the annular oil groove. The end surfaces of the ends of the valve stems 21 on both sides are provided with first drive grooves 211. At least one second drive groove 221 is provided on the end surface of the sealing flange 22 close to the annular oil groove. The groove surface starts from the end surface of the sealing flange 22 facing the working valve port, that is, from the end surface of the sealing flange 22 close to the annular oil groove, and extends to the peripheral wall of the sealing flange 22. At the same time, the second drive groove 221 is arranged obliquely relative to the axis of the valve core.

[0051] When the valve core is switched, the medium pressure and flow rate in the control chamber 12 suddenly change, causing pressure shock to the system, increasing the friction damage between the valve core and the valve chamber, and generating a large noise. With the second drive groove 221 disclosed in the present invention, a part of the medium first flows into the second drive groove 221, and the medium pressure is buffered, so that the pressure and flow rate changes at the beginning of work are slowed down, the friction damage between the valve core and the valve chamber is reduced, and the noise during work is reduced. The second drive groove 221 can guide the fluid to flow between the sealing flange 22 and the working valve port, help establish the pilot pressure, and thus control the switching action of the valve. At the same time, a tiny flow channel can be formed when the sealing flange 22 contacts the working valve port, which helps to improve the sealing effect and prevent leakage. The inclined second drive groove 221 can disperse the impact force of the fluid on the sealing flange 22, reduce excessive wear in specific areas, and extend the service life of the sliding valve.

[0052] In one embodiment, the projected area of ​​the second driving groove 221 in the axial plane of the valve core is divided into two parts relative to the axis, and the area of ​​one of the two parts is larger than the other.

[0053] Specifically, refer to Figure 3 , Figure 4 , the projection area of ​​the second driving groove 221 in the axial plane of the valve core is divided into two parts a and b relative to the axis, and the areas of the two parts a and b are not equal. Since both parts a and b start from the end surface of the plugging flange 22 facing the working valve port side, that is, from the end surface of the plugging flange 22 close to the annular oil groove, and extend to the peripheral wall of the plugging flange 22, the areas of the two parts a and b are not equal, that is, the groove surfaces of the two parts a and b have different inclination degrees, and the groove surface of the part with a larger area has a larger inclination angle with the vertical direction.

[0054] When the medium enters the second driving groove 221, the pressure on parts a and b can be decomposed into the tangential force of the valve core, and the valve core is driven to rotate around the axis. The rotation of the valve core changes the friction force state of the valve core, and the friction between the valve core and the valve cavity is uniform in all directions. The valve core and the valve cavity will not be damaged by repeated friction at the same position, which increases the service life of the valve body. In addition, the asymmetric design can help the slide valve quickly establish pilot pressure, speed up the opening or closing speed of the valve, and improve the response performance of the system.

[0055] like Figure 3 As shown in the figure, the area of ​​part a is larger than that of part b, so the inclination angle of part a with the vertical direction is larger, the pressure component of the medium on part a in the horizontal direction is smaller, and the pressure component of part b in the horizontal direction is larger. Therefore, the direction of the resultant force is consistent with the direction of the pressure component of part b in the horizontal direction, and the valve core is driven to rotate clockwise.

[0056] In addition, in another embodiment, the drive groove includes both a first drive groove 211 and a second drive groove 221. The first drive groove 211 and the second drive groove 221 work together to rotate the valve core along the axis. The rotation direction of the valve core driven by the pressure at the second drive groove 221 is consistent with the rotation direction of the valve core driven by the pressure at the first drive groove 211. The pressure at the first drive groove 211 drives the valve core to rotate clockwise, and the areas of parts a and b of the second drive groove 221 are correspondingly set to drive the valve core to rotate clockwise as well.

[0057] In one embodiment, the sealing flange 22 is provided with at least two second driving grooves 221 , and the at least two second driving grooves 221 are sequentially spaced apart in the circumferential direction around the center of the sealing flange 22 .

[0058] Specifically, the tangential force of the valve core drives the valve core to rotate, but if there is only one force, the valve core has a tendency to move radially outward, so the rotational movement of the valve core in the valve cavity is not stable enough. At least two second drive grooves 221 are provided on the sealing flange 22. Taking the two second drive grooves 221 as an example, if the two second drive grooves 221 are symmetrically arranged along the center of the valve core, the force components generated by the pressure of the medium on the two second drive grooves 221 are in opposite directions, and the two force components are not on the same straight line, then the tendency of the valve core to move radially outward is offset, and the valve core can rotate smoothly around the axis of the valve core. Therefore, at least two second drive grooves 221 are arranged in sequence along the circumferential direction around the center of the valve core to achieve a smooth rotational movement of the valve core under the pressure of the medium. In addition, the stress distribution of the sealing flange 22 during operation can be changed to avoid damage caused by local stress concentration, thereby extending the service life of the sliding valve.

[0059] In one embodiment, in the axial cross section of the valve core, the projection of the second driving groove 221 is triangular.

[0060] Specifically, the triangular second driving groove 221 can realize progressive control of the pilot pressure. When the valve core moves, the opening area of ​​the triangular groove gradually increases or decreases, thereby smoothly adjusting the pilot pressure. In addition, the tip of the triangular groove can better cooperate with the valve cavity to reduce the leakage of the medium between different channels. The design of the triangular groove can enable the valve core to quickly switch between different positions, thereby improving the response speed of the slide valve.

[0061] In one embodiment, in the projection in the axial plane of the valve core, the inclination angle β of the second driving groove 221 relative to the axis of the valve core is 15-20°.

[0062] Specifically, the inclination angle β of the second driving groove 221 relative to the axis of the valve core, that is, the inclination angle β between the intersection of the two parts a and b and the axis of the valve core is 15-20°. Reducing the inclination angle β can increase the inclination area of ​​the second driving groove 221 and increase the component force of the pressure of the medium on the second driving groove 221 in the tangential direction of the valve core, so that the valve core can be easily rotated under the pressure of the medium.

[0063] In addition, in order to facilitate better understanding, the use process of the sliding valve disclosed in the present invention is described in detail below in combination with the application scenario of the actual sliding valve.

[0064] 1. The valve core is in the starting position, blocking the two working valve ports A and B; 2. When the working valve port A needs to output the medium, under the action of the magnetic field generated by the energized coil, the control rod 4 moves axially to the left, and the control rod 4 pushes the valve core to overcome the preload force of the left return spring 3 and move axially to the left, and the valve core opens the working valve port A; 3. Through the oil inlet valve port P, the medium enters the annular oil groove between the two blocking flanges 22, and then enters the second driving groove 221 on the blocking flange 22. The medium enters the second driving groove 221, and the pressure on the two parts a and b can be decomposed into the tangential force of the valve core, and drives the valve core to rotate around the axis; 4. The working valve port A is connected to the oil inlet valve port P through the working chamber 11, and the medium is transported from the working valve port A; 5. After the work is completed, the control rod 4 moves to the right under the action of the magnetic field of the energized coil, and the valve core moves to the right to restore the initial state under the elastic force of the return spring 3, blocking the two working valve ports A and B; 6. When the working valve port B needs to output the medium, after the medium is introduced into the control chamber 12 on the left side through the control valve port C, the pressure of the medium gradually increases. When the medium pressure is greater than the preload force of the right return spring 3, the medium pushes the valve core to move axially to the right. At the same time, the medium acts on the first driving groove 211 on the end face of the valve core. The first driving groove 211 has two groove walls with unequal areas arranged relatively. The pressure of the medium on the groove wall with a smaller area is greater than the pressure on the groove wall with a larger area. The combined force generates a torque on the valve core. While the valve core moves axially in the valve chamber, it rotates around the axis of the valve core. The valve core opens the working valve port B and still blocks the working valve port A. 7. Through the oil inlet valve port P, the medium enters the annular oil groove between the two blocking flanges 22, and then enters the second driving groove 221 on the blocking flange 22. The medium enters the second driving groove 221, and the pressure on the two parts a and b can be decomposed into the tangential force of the valve core, and drives the valve core to rotate around the axis, and the rotation direction is consistent with the rotation direction of the valve core driven by the pressure of the first driving groove 211; 8. The working valve port B is connected to the oil inlet valve port P through the working chamber 11, and the medium is transported from the working valve port A.

[0065] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A sliding valve, characterized in that: The slide valve comprises: A valve body, wherein a valve cavity, a working valve port and a control valve port are arranged in the valve body; A valve core, the valve core being slidably disposed in the valve cavity and dividing the valve cavity into a working cavity (11) and a control cavity (12); a return spring (3), the return spring (3) being arranged in the control chamber (12) and pre-tightened between the end surface of the valve core and the valve body, so that when the pressure of the medium entering the control chamber (12) through the control valve port is less than or equal to the pre-tightening force of the return spring (3), the valve core blocks the working valve port, or when the medium pressure is greater than the pre-tightening force of the return spring (3), the medium pressure overcomes the elastic force of the return spring (3) and pushes the valve core to slide to open the working valve port; The valve core is provided with at least one driving groove, and the driving groove is configured to drive the valve core to rotate around an axis under the action of medium pressure.

2. The slide valve according to claim 1, characterized in that: The driving groove comprises a first driving groove (211), the first driving groove (211) being arranged on an end surface of the valve core located in the control chamber (12), the first driving groove (211) having two groove walls extending radially and arranged opposite to each other, the area of ​​one of the two groove walls being larger than the area of ​​the other groove wall.

3. The slide valve according to claim 2, characterized in that: At least two first driving grooves (211) are provided on the end surface of the valve core located in the control chamber (12), and the at least two first driving grooves (211) are arranged in sequence and spaced apart in the circumferential direction around the center of the valve core.

4. The slide valve according to claim 2, characterized in that: In the radial cross section of the valve core, the projection of the first driving groove (211) is fan-shaped.

5. The slide valve according to claim 2, characterized in that: In the projection on the axial plane of the valve core, the inclination angle α of the first driving groove (211) relative to the axis of the valve core is 75-85°.

6. The slide valve according to claim 2, characterized in that: The valve core comprises a first shaft section (212) and a second shaft section (213) which are arranged continuously along the axial direction, and the diameter of the first shaft section (212) is smaller than the diameter of the second shaft section (213).

7. The slide valve according to any one of claims 1 to 6, characterized in that: The valve core comprises a valve stem (21) and a sealing flange (22) which is radially protruding and is arranged on the valve stem (21); the sealing flange (22) is configured to seal the working valve port; the driving groove comprises a second driving groove (221); the second driving groove (221) is arranged on the sealing flange (22); the second driving groove (221) starts from an end surface of the sealing flange (22) facing the working valve port and extends obliquely to a peripheral wall of the sealing flange (22).

8. The slide valve according to claim 7, characterized in that: The projected area of ​​the second driving groove (221) in the axial plane of the valve core is divided into two parts relative to the axis, and the area of ​​one of the two parts is larger than the other.

9. The slide valve according to claim 7, characterized in that: The blocking flange (22) is provided with at least two second driving grooves (221), and the at least two second driving grooves (221) are arranged in sequence and spaced apart in the circumferential direction around the center of the blocking flange (22).

10. The slide valve according to claim 7, characterized in that In the axial cross section of the valve core, the projection of the second driving groove (221) is triangular.

11. The slide valve according to claim 7, characterized in that In the projection on the axial plane of the valve core, the inclination angle β of the second driving groove (221) relative to the axis of the valve core is 15-20°.

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