Double-coil two-position four-way electromagnetic directional valve

Abstract

The utility model discloses a double-coil two-position four-way electromagnetic directional valve which comprises a valve element, a limiting sleeve, a first coil control part, a second coil control part and a valve body. The valve element is arranged in a valve sleeve hole in the valve body in a left-right sliding mode, the limiting sleeve is arranged in the valve sleeve hole and attached to the inner surface of the valve sleeve hole so as to limit the valve element to be located at the first position or the second position, and then the valve element and a corresponding oil hole in the valve body are communicated or blocked. The first coil control part is arranged at the end of the valve body and is in driving connection with the valve element. The second coil control part and the first coil control part are arranged at the end of the valve body in series and are in driving connection with the valve element. When the first coil control part or the second coil control part is powered on, the valve element is driven to move to the corresponding first position or the second position so as to conduct oil way switching. The service life of the reversing valve can be prolonged, and the use energy consumption can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic electromagnetic reversing valves, and more specifically to a double-coil two-position four-way electromagnetic reversing valve. Background Art

[0002] Hydraulic solenoid reversing valves are widely used in various hydraulic systems for reversing hydraulic motors and hydraulic cylinders. Conventional hydraulic two-position four-way solenoid reversing valves use a single coil and only switch the oil circuit when powered on. The solenoid coil is always powered on. Long-term power supply can easily cause the coil to overheat and accelerate aging, reducing the service life of the equipment. At the same time, the power supply always provides electricity to the coil, and the energy consumption is relatively large. Therefore, it is of great significance to provide energy-saving and convenient reversing valves so that the reversing valves do not need to be powered on all the time. Utility Model Content

[0003] The utility model provides a double-coil two-position four-way electromagnetic reversing valve, which solves the problem that the electromagnetic coil of the existing hydraulic electromagnetic reversing valve is always in an energized state during operation, which easily reduces the service life of the equipment and consumes a lot of energy. The utility model can increase the service life of the reversing valve and reduce energy consumption.

[0004] In order to achieve the above objectives, the utility model provides the following technical solutions:

[0005] A double-coil two-position four-way electromagnetic reversing valve, comprising: a valve core, a limit sleeve, a first coil control part, a second coil control part and a valve body;

[0006] The valve core is slidably disposed in the valve sleeve hole in the valve body, and the limiting sleeve is disposed in the valve sleeve hole and is closely disposed on the inner surface of the valve sleeve hole to limit the valve core to be in the first position or the second position, thereby connecting or blocking the valve core with the corresponding oil hole on the valve body;

[0007] The first coil control unit is disposed at the end of the valve body and is drivingly connected to the valve core;

[0008] The second coil control unit is connected in series with the first coil control unit and is arranged at the end of the valve body and is drivingly connected to the valve core;

[0009] When the first coil control unit or the second coil control unit is powered on, the valve core is driven to move to the corresponding first position or the second position to switch the oil circuit.

[0010] Preferably, when the first coil control unit is energized, the valve core is driven to move leftward to the first position, and is limited by the limiting sleeve;

[0011] When the second coil control unit is energized, the valve core is driven to move rightward to the second position and is limited by the limiting sleeve.

[0012] Preferably, the first coil control unit comprises: a coil, a magnetic tube and a moving iron core;

[0013] The coil is wound around the magnetic tube, and the magnetic tube is sleeved on the moving iron core. When the coil is energized, the coil and the magnetic tube generate axial magnetic force on the moving iron core, pushing the moving iron core to move axially, thereby driving the valve core to move.

[0014] Preferably, the second coil control unit has the same structure as the first coil control unit.

[0015] Preferably, it further comprises: a first push rod;

[0016] One end of the first push rod is connected to the moving iron core corresponding to the second coil control part, and the other end of the first push rod is connected to the valve core;

[0017] When the second coil control part is energized, the moving iron core corresponding to the second coil control part drives the first push rod to move rightward, so as to push the valve core to move rightward to the second position.

[0018] Preferably, the valve core is surrounded by a first positioning groove and a second positioning groove;

[0019] When the first coil control part is powered on, the moving iron core corresponding to the first coil control part drives the valve core to move leftward to the first position, and the limiting sleeve cooperates with the first positioning groove to limit the position;

[0020] When the second coil control part is energized, the moving iron core corresponding to the second coil control part drives the valve core to move rightward to the second position, and the limiting sleeve cooperates with the second positioning groove to limit the position.

[0021] Preferably, a connecting pin hole is provided at one end of the valve core close to the first coil control part, and an axial through hole is provided at the moving iron core corresponding to the first coil control part. One end of the first push rod can movably pass through the axial through hole and be inserted in the valve core, and then the first push rod is axially connected to one end of the valve core through a connecting pin.

[0022] Preferably, the limiting sleeve is provided with a limiting groove, a limiting clamp ring and a steel ball are provided in the limiting groove, and the limiting clamp ring is used to press the steel ball into the first positioning groove or the second positioning groove on the surface of the valve core.

[0023] Preferably, the valve body is provided with a plurality of radial oil ports and an end axial oil port around one end of the valve core;

[0024] When the first coil control unit or the second coil control unit is energized, the valve core is driven to move to the corresponding first position or the second position, so that the corresponding radial oil port is connected to the end axial oil to switch the oil circuit.

[0025] Preferably, it also includes: a manual nut and a manual push rod;

[0026] The manual push rod is provided at one end of the moving iron core corresponding to the second coil control part and away from the first push rod, and the manual nut is sleeved on the manual push rod and connected to the end of the valve body;

[0027] By adjusting the relative positions of the manual push rod and the manual nut, the moving iron core corresponding to the second coil control part is driven to move rightward, so that the valve core is reset.

[0028] The utility model provides a double-coil two-position four-way electromagnetic reversing valve, which adopts a double-coil working mode. The first coil control part and the second coil control part respectively control the valve core to be in the corresponding first position or second position, and the valve core is limited by a limit sleeve; when the working oil circuit needs to be switched, only the first coil control part needs to be powered on for a short time, and the power supply can be stopped after the reversal is completed. At this time, the oil circuit still maintains the switching state. When it needs to be reset, only the second coil control part needs to be powered on to complete the switching, and the power can be cut off after the switching, and the state after the power is cut off is still maintained. The problem that the electromagnetic coil of the existing hydraulic electromagnetic reversing valve is always in the energized state during operation, which easily reduces the service life of the equipment and consumes a lot of energy, can be improved. The service life of the reversing valve can be improved, and the energy consumption can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0030] Figure 1 The utility model is a schematic diagram of a double-coil two-position four-way electromagnetic reversing valve.

[0031] Figure 2 It is a schematic diagram of the setting position of the limit sleeve provided in the embodiment of the utility model.

[0032] Figure 3 It is a cross-sectional schematic diagram of the electromagnetic reversing valve provided in the embodiment of the utility model.

[0033] Figure 4 It is a structural schematic diagram of the valve core provided in an embodiment of the utility model.

[0034] Figure 5 It is a schematic diagram of the oil port conduction between the valve core and the valve body provided by the embodiment of the utility model.

[0035] Figure 6 It is a schematic diagram of the limiting of the limiting clamp ring and the steel ball provided in the embodiment of the utility model.

[0036] Figure 7 It is a schematic diagram of the connection between the valve core and the first push rod provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present utility model, the embodiments of the present utility model are further described in detail below in conjunction with the accompanying drawings and implementation methods.

[0038] In view of the problem that the electromagnetic coil of the current single-coil hydraulic electromagnetic reversing valve is always in an energized state when it is working, which easily reduces the service life of the equipment and consumes a lot of energy, the utility model provides a double-coil two-position four-way electromagnetic reversing valve, which solves the problem that the electromagnetic coil of the existing hydraulic electromagnetic reversing valve is always in an energized state when it is working, which easily reduces the service life of the equipment and consumes a lot of energy. The utility model can increase the service life of the reversing valve and reduce energy consumption.

[0039] like Figures 1 to 7 As shown, a dual-coil two-position four-way electromagnetic reversing valve comprises: a valve core 2, a limit sleeve 3, a first coil control part S1, a second coil control part S2 and a valve body 1. The valve core 2 can be slidably arranged in the valve sleeve hole in the valve body 1, and the limit sleeve 3 is arranged in the valve sleeve hole and is closely arranged on the inner surface of the valve sleeve hole to limit the valve core 2 to be in the first position or the second position, so as to make the valve core 2 and the corresponding oil hole on the valve body 1 conduct or block. The first coil control part S1 is arranged at the end of the valve body and is connected to the valve core. The second coil control part S2 is connected to the first coil control part S1 in series at the end of the valve body 1 and is connected to the valve core 2. When the first coil control part S1 or the second coil control part S2 is energized, the valve core 2 is driven to move to the corresponding first position or the second position to switch the oil circuit.

[0040] Specifically, a first coil control unit and a second coil control unit are arranged in series at the end of the valve body. The first coil control unit and the second coil control unit control the movement of the valve core when the power is on. When the power is off, the position of the valve core is limited by the limit sleeve to prevent the valve core from moving and switching the oil circuit. When the working oil circuit needs to be switched, it is only necessary to briefly energize the first coil control unit or the second coil control unit. After the switching is completed, the power can be stopped. At this time, the oil circuit still maintains the switching state. Therefore, the coil of the electromagnetic reversing valve does not need to be kept energized all the time, which can increase the service life of the reversing valve and reduce energy consumption.

[0041] Further, when the first coil control unit S1 is powered on, the valve core 2 is driven to move leftward to the first position and is limited by the limit sleeve 3. When the second coil control unit S2 is powered on, the valve core is driven to move rightward to the second position and is limited by the limit sleeve 3.

[0042] In one embodiment, if Figure 3 and Figure 5 As shown, when the power is not on, the valve core is limited by the limit sleeve at the first position of the valve body so that the oil meets the functional requirements: oil port ③ and oil port ② are connected; oil port ④ and oil port ① are connected. When the oil circuit needs to be switched, the first coil control part S1 is energized, and the valve core 2 is driven to move to the left under the action of magnetic force, so that the valve core is in the first position, realizing the reversal, and meeting the function of use after power on, that is, oil port ③ and oil port ④ are connected; oil port ② and oil port ① are connected. When the first coil control part S1 is powered off, the oil circuit remains unchanged because the valve core is stuck by the limit sleeve. When the oil circuit needs to be reset, the second coil control part S2 is energized, and the valve core 2 is driven to move to the right by the second coil control part S2 under the action of magnetic force, so that the valve core is in the second position, realizing the reset, and meeting the function of reset after power on, that is, oil port ③ and oil port ② are connected; oil port ④ and oil port ① are connected. When the second coil control part is powered off, the position of the valve core 2 remains unchanged and the oil circuit remains unchanged. Therefore, the oil circuit switching can be completed by only energizing the first coil control unit and the second coil control unit for a short time (about 20 milliseconds), and the power can be turned off after the switching, and it does not need to be energized for a long time, which is particularly suitable for long-term work. The electromagnetic reversing valve can solve the problem that the electromagnetic coil of the existing hydraulic electromagnetic reversing valve is always in the energized state during operation, which easily reduces the service life of the equipment and consumes a lot of energy. It can increase the service life of the reversing valve and reduce energy consumption.

[0043] Furthermore, the first coil control unit includes: a coil, a magnetic tube and a moving iron core. The coil is wound on the magnetic tube, and the magnetic tube is sleeved on the moving iron core. When the coil is energized, the coil and the magnetic tube generate an axial magnetic force on the moving iron core, pushing the moving iron core to move axially, thereby driving the valve core to move.

[0044] In practical applications, the magnetic tube is connected to the valve sleeve of the valve body through threads and is tightened on the valve sleeve. The magnetic tube and the wound coil generate magnetic force to drive the moving iron core to move.

[0045] Furthermore, the second coil control unit has the same structure as the first coil control unit.

[0046] like Figure 3 As shown, the electromagnetic reversing valve further includes: a first push rod 9; one end of the first push rod 9 is connected to the moving iron core 10 corresponding to the second coil control part, and the other end of the first push rod 9 is connected to the valve core 2.

[0047] When the second coil control part is energized, the moving iron core 10 corresponding to the second coil control part drives the first push rod 9 to move rightward, so as to push the valve core 2 to move rightward to the second position.

[0048] like Figure 4 and Figure 5 As shown, the valve core 2 is surrounded by a first positioning groove 21 and a second positioning groove 22. When the first coil control part is energized, the movable iron core 8 corresponding to the first coil control part drives the valve core 2 to move left to the first position, and the limiting sleeve 3 cooperates with the first positioning groove to limit.

[0049] When the second coil control part is energized, the movable iron core 10 corresponding to the second coil control part drives the valve core 2 to move rightward to the second position, and the limiting sleeve 3 cooperates with the second positioning groove to limit the position.

[0050] like Figure 7 As shown, a connecting pin hole 23 is provided at one end of the valve core 2 close to the first coil control part, and an axial through hole is provided at the moving iron core 8 corresponding to the first coil control part, and one end of the first push rod 9 can movably pass through the axial through hole and be inserted into the valve core 2, and then the first push rod 9 is axially connected to one end of the valve core 2 through a connecting pin 7.

[0051] like Figure 6 As shown, the limiting sleeve 3 is provided with a limiting groove, in which a limiting clamp ring 31 and a steel ball 32 are provided, and the limiting clamp ring 31 is used to press the steel ball 32 into the first positioning groove 21 or the second positioning groove 22 on the surface of the valve core.

[0052] Furthermore, the valve body is located at one end of the valve core and is surrounded by a plurality of groups of radial oil ports and end axial oil ports; when the first coil control unit or the second coil control unit is energized, the valve core is driven to move to the corresponding first position or the second position, so that the corresponding radial oil port is connected to the end axial oil to switch the oil circuit.

[0053] In one embodiment, if Figure 3 and Figure 5As shown, when the power is off, the valve core 2 is fixed in the first positioning groove of the valve core 2 by the steel ball 32 and the limit sleeve 3, so that the oil meets the functional requirements: oil port ③ and oil port ② are connected; oil port ④ and oil port ① are connected. When the oil circuit needs to be switched, the first coil control unit S1 is energized, and the valve core 2 is driven to move to the left by the moving iron core 8 of the first coil control unit under the action of magnetic force, so that the steel ball 32 is stuck in the right slot, and the reversal is achieved, which meets the function of use after power is turned on, that is, oil port ③ and oil port ④ are connected; oil port ② and oil port ① are connected. When the oil circuit needs to be reset, the second coil control unit S2 is energized, and the valve core 2 is driven to move to the right by the moving iron core 10 of the second coil control unit under the action of magnetic force, so that the steel ball 32 is stuck in the left slot, and the reset is achieved, which meets the function of reset after power is turned on, that is, oil port ③ and oil port ② are connected; oil port ④ and oil port ① are connected.

[0054] The electromagnetic reversing valve also includes: a manual nut 4 and a manual push rod 5; the manual push rod 5 is provided at the end of the moving iron core corresponding to the second coil control part away from the first push rod 9, and the manual nut 4 is sleeved on the manual push rod 5 and connected to the end of the valve body; by adjusting the relative position of the manual push rod 5 and the manual nut 4, the moving iron core corresponding to the second coil control part is driven to move rightward to reset the valve core.

[0055] In actual applications, when the second coil control unit loses power and does not work or fails, it can be manually reset by a manual push rod. The manual push rod can be adjusted by a hard object such as a screwdriver or a screwdriver to push the valve core to reset.

[0056] It can be seen that the utility model provides a dual-coil two-position four-way electromagnetic reversing valve, which adopts a dual-coil working mode. The first coil control unit and the second coil control unit respectively control the valve core to be in the corresponding first position or second position, and the valve core is limited by the limit sleeve; when the working oil circuit needs to be switched, only the first coil control unit needs to be powered on for a short time, and the power can be stopped after the reversal is completed. At this time, the oil circuit still maintains the switching state. When it needs to be reset, only the second coil control unit needs to be powered on to complete the switching. After the switching, the power can be turned off, and the state after the switching is maintained after the power is turned off. The problem that the electromagnetic coil of the existing hydraulic electromagnetic reversing valve is always in the energized state during operation, which easily reduces the service life of the equipment and consumes a lot of energy, can be improved. The service life of the reversing valve can be improved and the energy consumption can be reduced.

[0057] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation as shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A double-coil two-position four-way electromagnetic reversing valve, characterized in that: include: A valve core, a limit sleeve, a first coil control part, a second coil control part and a valve body; The valve core is slidably disposed in the valve sleeve hole in the valve body, and the limiting sleeve is disposed in the valve sleeve hole and is closely disposed on the inner surface of the valve sleeve hole to limit the valve core to be in the first position or the second position, thereby connecting or blocking the valve core with the corresponding oil hole on the valve body; The first coil control unit is disposed at the end of the valve body and is drivingly connected to the valve core; The second coil control unit is connected in series with the first coil control unit and is arranged at the end of the valve body and is drivingly connected to the valve core; When the first coil control unit or the second coil control unit is powered on, the valve core is driven to move to the corresponding first position or the second position to switch the oil circuit.

2. The double-coil two-position four-way electromagnetic reversing valve according to claim 1 is characterized in that: When the first coil control unit is energized, the valve core is driven to move leftward to the first position, and is limited by the limiting sleeve; When the second coil control unit is energized, the valve core is driven to move rightward to the second position and is limited by the limiting sleeve.

3. The double-coil two-position four-way electromagnetic reversing valve according to claim 2 is characterized in that: The first coil control unit includes: a coil, a magnetic tube and a moving iron core; The coil is wound around the magnetic tube, and the magnetic tube is sleeved on the moving iron core. When the coil is energized, the coil and the magnetic tube generate axial magnetic force on the moving iron core, pushing the moving iron core to move axially, thereby driving the valve core to move.

4. The double-coil two-position four-way electromagnetic reversing valve according to claim 3 is characterized in that: The second coil control unit has the same structure as the first coil control unit.

5. The double-coil two-position four-way electromagnetic reversing valve according to claim 4, characterized in that: Also includes: First putt; One end of the first push rod is connected to the moving iron core corresponding to the second coil control part, and the other end of the first push rod is connected to the valve core; When the second coil control part is energized, the moving iron core corresponding to the second coil control part drives the first push rod to move rightward, so as to push the valve core to move rightward to the second position.

6. The double-coil two-position four-way electromagnetic reversing valve according to claim 5, characterized in that: The valve core is surrounded by a first positioning groove and a second positioning groove; When the first coil control part is powered on, the moving iron core corresponding to the first coil control part drives the valve core to move leftward to the first position, and the limiting sleeve cooperates with the first positioning groove to limit the position; When the second coil control part is energized, the moving iron core corresponding to the second coil control part drives the valve core to move rightward to the second position, and the limiting sleeve cooperates with the second positioning groove to limit the position.

7. The double-coil two-position four-way electromagnetic reversing valve according to claim 6, characterized in that: A connecting pin hole is provided at one end of the valve core close to the first coil control part, and an axial through hole is provided at the moving iron core corresponding to the first coil control part. One end of the first push rod can movably pass through the axial through hole and be inserted into the valve core, and then the first push rod is axially connected to one end of the valve core through a connecting pin.

8. The double-coil two-position four-way electromagnetic reversing valve according to claim 7, characterized in that: The limiting sleeve is provided with a limiting groove, and a limiting clamp ring and a steel ball are provided in the limiting groove. The limiting clamp ring is used to press the steel ball into the first positioning groove or the second positioning groove on the surface of the valve core.

9. The double-coil two-position four-way electromagnetic reversing valve according to claim 8, characterized in that: The valve body is located at one end of the valve core and is surrounded by a plurality of radial oil ports and an end axial oil port; When the first coil control unit or the second coil control unit is energized, the valve core is driven to move to the corresponding first position or the second position, so that the corresponding radial oil port is connected to the end axial oil to switch the oil circuit.

10. The double-coil two-position four-way electromagnetic reversing valve according to claim 9, characterized in that: Also includes: Manual nut and manual push rod; The manual push rod is provided at one end of the moving iron core corresponding to the second coil control part and away from the first push rod, and the manual nut is sleeved on the manual push rod and connected to the end of the valve body; By adjusting the relative positions of the manual push rod and the manual nut, the moving iron core corresponding to the second coil control part is driven to move rightward, so that the valve core is reset.

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