Rotary reversing valve
By setting a symmetrical bore group in the outer sleeve and valve core of the rotary reversing valve, the leakage and bearing damage caused by the asymmetry of the valve core in the prior art is solved, and a longer service life and higher reliability are achieved.
Patent Information
- Application Number
- CN202421479048.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The valve core of the existing rotary reversing valve is subjected to asymmetric force, which can easily cause valve core leakage or bearing damage during long-term use, especially under high flow or high pressure conditions.
By providing a symmetrical bore group in the outer sleeve and valve core, the valve core of the rotary reversing valve is subjected to symmetrical force in the working state, and the force of the valve core is designed to balance the valve core by using the symmetrical bore group to reduce the eccentric force.
The symmetrical force of the rotary reversing valve valve spool in the working state is achieved, which extends the service life of the valve spool and bearings, reduces the risk of leakage and damage, and is more obvious in high flow or high pressure conditions.
Smart Images
Figure CN222616081U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reversing valves, in particular to a rotary reversing valve. Background Art
[0002] The reversing valve includes an electromagnetic reversing valve, which is usually composed of a valve body, a valve core, an electromagnet, etc. When the electromagnet is energized, the magnetic field generated acts on the valve core, attracting the valve core to one side of the electromagnet, thereby closing the original passage and opening a new passage to change the flow direction of the fluid. When the electromagnet is powered off, the valve core returns to its original position, the original passage is restored, and the fluid flow direction returns to its initial state. However, the electromagnet in the electromagnetic reversing valve may be disturbed by external factors such as electromagnetic interference and voltage fluctuations, affecting the normal operation of the reversing valve. In order to solve the problems existing in the electromagnetic valve, a rotary reversing valve has appeared on the market, which realizes the switching of the oil circuit direction by rotating the valve core. However, the force on the valve core of the existing rotary reversing valve is asymmetric. When the asymmetric area deviation is larger, the pressure is larger, and the eccentric force is larger. When used for a long time, the wear of the bearing or valve core will be greater, which is easy to cause leakage of the valve core or damage to the bearing. For some valves with large flow or high pressure, the wear effect will be greater. Utility Model Content
[0003] The first object of the utility model is to provide a transmission device, wherein a symmetrical hole group is arranged on the valve core so that the valve core of the rotary reversing valve is subjected to symmetrical force in a working state, which is beneficial to prolonging the life of the rotary reversing valve.
[0004] In order to achieve the above object, the utility model provides a rotary reversing valve, comprising:
[0005] An outer sleeve, the outer sleeve comprising a pair of first hole groups symmetrically arranged along its axis, each of the first hole groups comprising an oil supply port, an oil return port, a first working port, and a second working port;
[0006] The valve core is axially rotatably arranged in the outer sleeve, and the outer wall of the valve core is provided with a pair of second hole groups symmetrical along the axis thereof, each of the second hole groups includes a first oil hole, a second oil hole, an oil passage and an oil groove, and the oil groove is arranged between the first oil hole and the second oil hole; the valve core is provided with an oil passage inside, and the first oil hole and the second oil hole are respectively connected with the oil passage;
[0007] The valve core has a first position, a second position and a third position relative to the outer sleeve;
[0008] When in the first position, the oil supply port and the first working port are both connected to the first oil hole; the oil return port and the second working port are both connected to the oil groove;
[0009] When in the second position, the oil supply port is connected to the first oil hole; the oil return port is connected to the oil groove; the first working port is disconnected from the first oil hole and the oil groove; the second working port is disconnected from the oil groove and the second oil hole;
[0010] In the third position, the oil supply port is connected to the first oil hole; the oil return port and the first working port are respectively connected to the oil groove; and the second working port is connected to the second oil hole.
[0011] In a preferred embodiment, the oil groove comprises a first section, a second section, a third section and a fourth section which are connected in sequence; the first section and the third section extend along the circumferential direction of the valve core; the second section and the fourth section extend along the axial direction of the valve core; in the axial direction of the valve core, the first section is aligned with the second oil hole, and the fourth section is aligned with the first oil hole;
[0012] Along the axial direction of the valve core, the oil supply port, the first working port and the fourth section are aligned, and the oil return port, the second working port and the third section are aligned.
[0013] In a preferred embodiment, the oil groove also includes a fifth section connected to the third section; in the circumferential direction of the valve core, the fifth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil supply port and the first working port.
[0014] In a preferred embodiment, the oil groove also includes a sixth section connected to the third section; in the circumferential direction of the valve core, the sixth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil return port and the second working port.
[0015] In a preferred embodiment, the oil groove further includes a fifth section connected to the third section; in the circumferential direction of the valve core, the fifth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil supply port and the first working port;
[0016] The oil groove also includes a sixth section connected to the third section; in the circumferential direction of the valve core, the sixth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil return port and the second working port.
[0017] In a preferred embodiment, the first oil hole extends around the circumference of the valve core, and the length of the first oil hole is consistent with the length of the first section.
[0018] In a preferred embodiment, the oil supply port, the oil return port, the first working port, and the second working port are distributed in a matrix on the outer sleeve.
[0019] Compared with the prior art, the beneficial effects achieved by the utility model are:
[0020] The rotary reversing valve provided by the utility model arranges symmetrical hole groups on the outer sleeve and the valve core so that the valve core of the rotary reversing valve is subjected to symmetrical force in a working state, thereby solving the technical problems in the prior art of valve core leakage or bearing damage caused by the valve core being affected by the deflection force, and is beneficial to prolonging the service life of the rotary reversing valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 It is a structural schematic diagram of the middle and outer sleeve of the utility model;
[0023] Figure 2 It is a structural schematic diagram of the valve core in the first embodiment of the utility model;
[0024] Figure 3 is a perspective view of the rotary reversing valve in the first embodiment when the valve core is in the first position;
[0025] Figure 4 is a perspective view of the rotary reversing valve in the first embodiment when the valve core is in the second position;
[0026] Figure 5 is a perspective view of the rotary reversing valve when the valve core is in the third position in the first embodiment;
[0027] Figure 6 This is a schematic diagram of the structure of the valve core in the second embodiment of the utility model;
[0028] Figure 7 It is a structural schematic diagram of the valve core in the third embodiment of the utility model;
[0029] Figure 8 It is a structural schematic diagram of the valve core in the fourth embodiment of the utility model;
[0030] Description of Figure Numbers:
[0031] 1. Outer sleeve; P, oil supply port; T, oil return port; A, first working port; B, second working port; 2. Valve core; 21, first oil hole; 22, second oil hole; 23, oil groove; 231, first section; 232, second section; 233, third section; 234, fourth section; 235, fifth section; 236, sixth section; 24, oil passage. DETAILED DESCRIPTION
[0032] In order to facilitate a better understanding of the purpose, structure, features and efficacy of the utility model, the utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the figures are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.
[0033] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0034] Embodiment 1
[0035] See also Figure 1-5, this embodiment provides a rotary reversing valve for connecting an actuator, such as a hydraulic cylinder structure. The rotary reversing valve includes an outer sleeve 1 and a valve core 2. The outer sleeve 1 and the valve core 2 are both axially symmetrical structures, wherein the outer sleeve 1 includes a pair of first hole groups symmetrical along its axis, each of which includes an oil supply port P, an oil return port T, a first working port A, and a second working port B; the valve core 2 is axially rotatably arranged in the outer sleeve 1, and the outer wall of the valve core 2 is provided with a pair of second hole groups symmetrical along the axis of the valve core, each of which includes a first oil hole 21, a second oil hole 22, an oil passage and an oil groove 23, and the oil groove 23 is arranged between the first oil hole 21 and the second oil hole 22; an oil passage is arranged inside the valve core 2, and the first oil hole 21 and the second oil hole 22 are respectively connected to the oil passage. That is, the first oil hole 21 and the second oil hole 22 are connected, and the valve core 2 can be driven to rotate by an external driving mechanism (not shown), and the external mechanism is preferably a servo motor, which can accurately control the rotation angle of the valve core 2.
[0036] By setting a symmetrical hole group on the valve core, the rotary reversing valve is subjected to symmetrical force in the working state, which solves the technical problem in the prior art that the valve core is easily leaked or the bearing is damaged due to the asymmetric force area of the valve core, and is beneficial to improving the life of the rotary reversing valve.
[0037] See also Figure 1-5 , under the drive of the external mechanism, the valve core 2 has a first position, a second position and a third position relative to the outer sleeve 1; in the first position, the oil supply port P and the first working port A are both connected to the first oil hole 21; the oil return port T and the second working port B are both connected to the oil groove 23. At this time, the oil supply port P is connected to the first working port A; the oil return port T is connected to the second working port B. The oil path direction is from the first working port A to the second working port B.
[0038] When the valve core 2 rotates to the second position, the oil supply port P is connected to the first oil hole 21; the oil return port T is connected to the oil groove 23; the first working port A is disconnected from the first oil hole 21 and the oil groove 23; the second working port B is disconnected from the oil groove 23 and the second oil hole 22; at this time, the first working port A and the second working port B are both disconnected from the oil outlet and the oil return port T. In this way, the rotary reversing valve is in a closed state, and the position and pressure of the actuator remain unchanged.
[0039] When the valve core 2 rotates to the third position, the oil supply port P is connected to the first oil hole 21; the oil return port T and the first working port A are respectively connected to the oil groove 23; the second working port B is connected to the second oil hole 22. At this time, the oil return port T is connected to the first working port A, and the second working port B is connected to the oil supply hole. The oil path direction is from the second working port B to the first working port A. That is, the oil path direction of the valve core 2 in the third position is opposite to the oil path direction of the valve core 2 in the first position.
[0040] By controlling the rotation position of the valve core 2, the direction of the oil circuit can be adjusted to switch in the opposite direction or stop the flow. The rotary reversing valve does not need to be provided with an electromagnet structure, which can solve the problem in the prior art that the reversing valve may be affected by external factors such as electromagnetic interference and voltage fluctuations, affecting the normal operation of the reversing valve, and can reduce the impact force caused by the reversal of the valve core 2. In addition, by controlling the valve core 2 to rotate slightly, the working port and the oil hole or oil groove 23 are partially offset, and the flow rate of the first working port A or the second working port B can be adjusted, thereby controlling the moving speed of the actuator. Compared with the solenoid valve, the operation is more flexible and stepless speed regulation can be achieved.
[0041] In this embodiment, the oil groove 23 includes a first section 231, a second section 232, a third section 233 and a fourth section 234 which are connected in sequence; the first section 231 and the third section 233 extend along the circumferential direction of the valve core 2; the second section 232 and the fourth section 234 extend along the axial direction of the valve core 2; in the axial direction of the valve core 2, the first section 231 is aligned with the second oil hole 22, and the fourth section 234 is aligned with the first oil hole 21; in the axial direction of the valve core 2, the oil supply port P, the first working port A and the fourth section 234 are aligned, and the oil return port T, the second working port B and the third section 233 are aligned. The first section 231, the second section 232, the third section 233 and the fourth section 234 can be extended in a straight line or with a certain arc.
[0042] In this embodiment, the oil supply port P, the oil return port T, the first working port A, and the second working port B are arranged in a matrix on the outer sleeve 1. Along the axial direction of the valve core 2, the oil supply port P and the oil return port T are located in the same column, and the first working port A and the second working port B are located in the same column.
[0043] In this embodiment, the first oil hole 21 is strip-shaped and extends around the circumference of the valve core 2, and its length is consistent with the length of the first section 231. The length of the first oil hole 21 corresponds to the distance between the oil supply hole and the first working port A, so that the oil supply hole and the first working port A can be connected to the first oil hole 21 at the same time; the length of the first section 231 corresponds to the distance between the oil return port T and the second working port B.
[0044] Embodiment 2
[0045] See also Figure 6 The difference between this embodiment and the first embodiment is that the oil groove 23 also includes a fifth section 235 connected to the third section 233; in the circumferential direction of the valve core 2, the fifth section 235 is located between the second section 232 and the fourth section 234; along the axial direction of the valve core 2, the fifth section 235 is aligned with the oil supply port P and the first working port A.
[0046] Embodiment 3
[0047] See also Figure 7The difference between this embodiment and the first embodiment is that the oil groove 23 also includes a sixth section 236 connected to the third section 233; in the circumferential direction of the valve core 2, the sixth section 236 is located between the second section 232 and the fourth section 234; along the axial direction of the valve core 2, the fifth section 235 is aligned with the return oil port T and the second working port B.
[0048] Embodiment 4
[0049] See also Figure 8 , the difference between this embodiment and the first embodiment is that the oil groove 23 further includes a fifth section 235 and a sixth section 236 connected to the third section 233; in the circumferential direction of the valve core 2, the fifth section 235 is located between the second section 232 and the fourth section 234; along the axial direction of the valve core 2, the fifth section 235 is aligned with the oil supply port P and the first working port A. In the circumferential direction of the valve core 2, the sixth section 236 is located between the second section 232 and the fourth section 234; along the axial direction of the valve core 2, the fifth section 235 is aligned with the oil return port T and the second working port B.
[0050] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A rotary reversing valve, characterized in that: include: An outer sleeve, the outer sleeve comprising a pair of first hole groups symmetrically arranged along its axis, each of the first hole groups comprising an oil supply port, an oil return port, a first working port, and a second working port; The valve core is axially rotatably arranged in the outer sleeve, and the outer wall of the valve core is provided with a pair of second hole groups symmetrically along the axis of the valve core, each of the second hole groups includes a first oil hole, a second oil hole, an oil passage and an oil groove, and the oil groove is arranged between the first oil hole and the second oil hole; the valve core is provided with an oil passage inside, and the first oil hole and the second oil hole are respectively connected to the oil passage; The valve core has a first position, a second position and a third position relative to the outer sleeve; When in the first position, the oil supply port and the first working port are both connected to the first oil hole; the oil return port and the second working port are both connected to the oil groove; When in the second position, the oil supply port is connected to the first oil hole; The oil return port is connected to the oil groove; the first working port is disconnected from the first oil hole and the oil groove; The second working port is disconnected from the oil groove and the second oil hole; When in the third position, the oil supply port is connected to the first oil hole; The oil return port and the first working port are respectively connected to the oil tank; The second working port is communicated with the second oil hole.
2. A rotary reversing valve according to claim 1, characterized in that: The oil groove comprises a first section, a second section, a third section and a fourth section which are connected in sequence; the first section and the third section extend along the circumferential direction of the valve core; the second section and the fourth section extend along the axial direction of the valve core; along the axial direction of the valve core, the first section is aligned with the second oil hole, and the fourth section is aligned with the first oil hole; Along the axial direction of the valve core, the oil supply port, the first working port and the fourth section are aligned.
3. A rotary reversing valve according to claim 2, characterized in that: The oil groove also includes a fifth section connected to the third section; in the circumferential direction of the valve core, the fifth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil supply port and the first working port.
4. A rotary reversing valve according to claim 3, characterized in that: The oil groove also includes a sixth section connected to the third section; in the circumferential direction of the valve core, the sixth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil return port and the second working port.
5. A rotary reversing valve according to claim 2, characterized in that: The oil groove also includes a fifth section and a sixth section connecting the third section; in the circumferential direction of the valve core, the fifth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil supply port and the first working port; in the circumferential direction of the valve core, the sixth section is located between the second section and the fourth section; along the axial direction of the valve core, the fifth section is aligned with the oil return port and the second working port.
6. A rotary reversing valve according to claim 2, characterized in that: The first oil hole extends around the circumference of the valve core, and the length of the first oil hole is consistent with the length of the first section.
7. A rotary reversing valve according to claim 2, characterized in that: The oil supply port, the oil return port, the first working port, and the second working port are distributed in a matrix on the outer sleeve.