Plug-in zero-leakage electromagnetic directional valve with position feedback function

Abstract

The invention discloses a plug-in mounting type zero-leakage electromagnetic reversing valve with a position feedback function. The plug-in mounting type zero-leakage electromagnetic reversing valve comprises a permanent magnet, a left armature, a right armature, a shell, a valve element, a left coil, a right coil, a long moving rod and a Hall position sensor. The left end of the long moving rod is connected with a locking nut, the locking nut fixes a handle through a nut locking screw, and a Hall position sensor is embedded in the inner side of the handle and used for detecting the distance between the handle and a permanent magnet; when the left coil is powered on, an output oil port of a valve port of the electromagnetic reversing valve is communicated with an oil return port, an oil supply port is isolated, and the pressure relief and unloading functions of the output oil port and an oil return path of the hydraulic system are achieved. When the right coil is powered on, the oil supply port of the valve port of the electromagnetic directional valve is communicated with the oil output port, the oil return port is isolated, and the zero-leakage pressure maintaining function of the oil supply port and the oil output port of the hydraulic system is achieved. The reversing valve can be used for emergency hydraulic loop function switching, the reversing valve adopts zero-leakage design, and the requirement for large loads or occasions with high oil pressure maintaining requirements is met.

Description

Technical Field

[0001] The invention relates to the field of hydraulic oil circuit switching, and in particular to a plug-in position feedback type zero-leakage electromagnetic reversing valve. Background Art

[0002] Directional valves are valves that change the on-off relationship of the main oil ports of the valve body according to the relative position of the valve core and the valve body, so as to connect the oil circuits, switch or change the direction of the fluid flow. Directional valves are of many types and widely used, and are often used in traditional industrial hydraulics or walking machinery. At present, industrial directional valves generally have problems such as large leakage and unreliable switching process. If the leakage is too large, it will cause serious heating of the hydraulic system and reduce the switching efficiency. With the development of hydraulic technology, higher requirements are put forward for directional valves, including requirements for small leakage, reliable switching, sensitive action, and smooth and impact-free switching.

[0003] At present, conventional plug-in solenoid reversing valves have the advantages of low cost and reliable switching. However, they cannot meet the requirements of large loads and high oil pressure maintenance after switching. In view of the shortcomings of the existing technology, a plug-in position feedback zero leakage solenoid reversing valve is proposed. The valve is connected to the oil circuit by plug-in method, and the installation method is simple. The reversing valve is designed with a position feedback sensor, which can detect the working position of the valve core in real time. In addition, the reversing of the oil port can be manually controlled to switch the function of the emergency hydraulic circuit. The reversing valve adopts a zero leakage design, which can meet the requirements of large loads or high oil pressure maintenance. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a plug-in zero-leakage electromagnetic reversing valve with position feedback function, which can not only realize the reversal of the hydraulic oil circuit, but also determine the working position of the valve core by detecting the valve core position signal, and has the valve core position monitoring function. It is suitable for hydraulic circuits with large loads and high requirements for maintaining pressure in the oil circuit for a long time.

[0005] The specific technical solutions of the present invention are as follows:

[0006] A plug-in zero-leakage electromagnetic reversing valve with a position feedback function, comprising a permanent magnet, a left armature, a right armature, a housing, a valve core, a left coil, a right coil, a moving long rod, and a Hall position sensor;

[0007] The left end of the moving long rod is connected to a locking nut, and the locking nut fixes the handle through a nut locking screw, wherein: a Hall position sensor is embedded inside the handle for detecting the distance between the handle and the permanent magnet;

[0008] The moving long rod is fixedly connected to the left armature and the right armature;

[0009] The moving long rod is connected to the valve core via a positioning pin;

[0010] The housing is provided with a support sleeve, a left coil, a magnetic conductive ring, and a right coil in sequence from the left end to the right end, and a valve sleeve is provided at the right end of the housing;

[0011] The left coil is energized to control the left armature to move to the left, and at the same time drives the locking nut, the moving long rod, the valve core, and the positioning pin to move to the left together;

[0012] The right coil is energized to control the right armature to move rightward, and at the same time drives the locking nut, the moving long rod, the valve core, and the positioning pin to move rightward together.

[0013] Preferably, the shell is connected to the support sleeve and the valve sleeve by threaded connection.

[0014] Preferably, sealing ring grooves are provided at the left and right ends of the valve core, a sealing ring f is installed in the left groove, and a sealing ring e is installed in the right groove, which can realize the connection between the isolated output oil, the return oil port and the oil supply port.

[0015] Preferably, the outer surface of the valve sleeve is provided with two sealing ring grooves, in which sealing rings c and d are respectively installed, so as to achieve sealing isolation between the oil circuits.

[0016] Preferably, a sealing ring a is provided on the left side of the moving long rod, and a sealing groove is provided on the right side of the shell, and a sealing ring b is installed in the groove.

[0017] Preferably, when the left coil is energized, the oil output port of the electromagnetic reversing valve is connected to the oil return port, and the oil supply port is isolated, thereby realizing the pressure relief and unloading function of the oil output port and the oil return circuit of the hydraulic system.

[0018] Preferably, when the right coil is energized, the oil supply port and the oil output port of the electromagnetic reversing valve are connected, and the oil return port is isolated, thereby achieving a zero-leakage and pressure-maintaining function for the oil supply port and the oil output port of the hydraulic system.

[0019] Preferably, when the left coil is energized, the right coil is de-energized; when the left coil is de-energized, the right coil is energized.

[0020] Preferably, by pulling the electromagnetic reversing valve handle, the reversing function of the electromagnetic reversing valve can be completed instead of energizing the left coil and the right coil.

[0021] Preferably, the Hall sensor detects the position signal of the valve core movement process in real time by sensing the magnetic flux size of the permanent magnet.

[0022] The present invention proposes a plug-in zero-leakage electromagnetic reversing valve with position feedback function, which is suitable for hydraulic oil circuit switching of hydraulic systems. Compared with the prior art, its advantages and beneficial effects are:

[0023] (1) The present invention can realize electromagnetically controlled hydraulic oil switching under a higher supply pressure environment through the electromagnetic structure and valve core structure design, meeting the working load of the hydraulic system or the functional switching requirements of the actuator circuit;

[0024] (2) The present invention can meet the working conditions where the system has high leakage requirements through reasonable sealing valve core design, and is particularly suitable for hydraulic circuits requiring large load output and high pressure maintenance requirements;

[0025] (3) The present invention uses an electromagnetic reversing valve with a built-in Hall position sensor to monitor and determine the working position of the valve core during movement in real time, and to understand the state of the electromagnetic reversing valve in the entire hydraulic circuit;

[0026] (4) The present invention can realize the reversing function not only by electromagnetic control but also by manual control through the electromagnetic reversing valve, which can meet the requirements of emergency or special use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 The utility model is a structure diagram of a plug-in zero-leakage electromagnetic reversing valve with position feedback.

[0029] Figure 2 It is a schematic diagram of the position of the hydraulic valve port part of the solenoid reversing valve working mechanism.

[0030] Figure 3 This is a schematic diagram of the position of the hydraulic valve port part in the second situation of the working mechanism of the electromagnetic reversing valve.

[0031] Explanation of the accompanying drawings: 1. locking nut; 2. handle; 3. nut fastening screw; 4. permanent magnet; 5. support sleeve; 6. sealing ring a; 7. left armature; 8. left coil; 9. magnetic ring; 10. right coil; 11. right armature; 12. housing; 13. sealing ring b; 14. magnetic sleeve; 15. valve sleeve; 16. sealing ring c; 17. sealing ring d; 18. sealing ring e; 19. valve core; 20. sealing ring f; 21. positioning pin; 22. moving long rod; 23. Hall sensor. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] Figure 1 The utility model is a structure diagram of a plug-in zero-leakage electromagnetic reversing valve with position feedback.

[0036] like Figure 1 As shown, a position feedback plug-in zero-leakage electromagnetic reversing valve structure comprises a permanent magnet (4), a left armature (7), a right armature (11), a housing (12), a valve core (19), a left coil (8), a right coil (10), a moving long rod (22), and a Hall position sensor (23);

[0037] The left end of the moving long rod (22) is connected to a locking nut (1), and the locking nut (1) fixes the handle (2) through a nut locking screw (3), wherein: a Hall position sensor (23) is embedded inside the handle (2) for detecting the distance between the handle and the permanent magnet (4);

[0038] The moving long rod (22) is fixedly connected to the left armature (7) and the right armature (11);

[0039] The moving long rod (22) is connected to the valve core (19) via a positioning pin (21);

[0040] The housing (12) is provided with a support sleeve (5), a left coil (8), a magnetic conductive ring (9), and a right coil (10) in sequence from the left end to the right end, and a valve sleeve (15) is provided at the right end of the housing (12);

[0041] The left coil (8) is energized to control the left armature (7) to move leftward, and at the same time drives the locking nut (1), the moving long rod (22), the valve core (19), and the positioning pin (21) to move leftward together;

[0042] The right coil (10) is energized to control the right armature (11) to move rightward, and at the same time drives the locking nut (1), the moving long rod (22), the valve core (19) and the positioning pin (21) to move rightward together.

[0043] The housing (12) is connected to the support sleeve (5) and the valve sleeve (15) by threaded connection.

[0044] The valve core (19) is provided with sealing ring grooves at both ends, the left groove is provided with a sealing ring f (20), and the right groove is provided with a sealing ring e (18).

[0045] The outer surface of the valve sleeve (15) is provided with two sealing ring grooves, in which sealing rings c (16) and sealing rings d (17) are respectively installed, so as to realize sealing isolation between oil circuits.

[0046] A sealing ring a (6) is arranged on the left side of the moving long rod (22), and a sealing groove is arranged on the right side of the housing (12), in which a sealing ring b (13) is arranged.

[0047] When the left coil (8) is energized, the oil output port of the electromagnetic reversing valve is connected to the oil return port, and the oil supply port is isolated, thereby realizing the pressure relief and unloading function of the oil output port and the oil return circuit of the hydraulic system.

[0048] When the right coil (10) is energized, the oil supply port and the oil output port of the electromagnetic reversing valve are connected, and the oil return port is isolated, thereby realizing the zero leakage and pressure maintenance function of the oil supply port and the oil output port of the hydraulic system.

[0049] When the left coil (8) is energized, the right coil (10) is de-energized; when the left coil (8) is de-energized, the right coil (10) is energized.

[0050] By pulling the electromagnetic reversing valve handle (2), the reversing function of the electromagnetic reversing valve can be completed instead of the way in which the left coil (8) and the right coil (10) are energized.

[0051] The Hall sensor (23) detects the position signal of the movement process of the valve core (19) in real time by sensing the size of the permanent magnet magnetic flux.

[0052] Figure 2 It is a schematic diagram of the position of the hydraulic valve port part of the solenoid reversing valve working mechanism.

[0053] Working mechanism of the electromagnetic reversing valve: When the left coil (8) is energized, the left armature (7), the locking nut (1), the moving long rod (22), the valve core (19), and the positioning pin (21) move to the left together, and the output oil port of the electromagnetic reversing valve is connected to the return oil port, and the oil supply port is isolated. Since the valve core (19) is equipped with a sealing ring f (20) and a sealing ring e (18), the pressure relief and unloading function of the hydraulic system output oil port and the return oil circuit can be realized.

[0054] Figure 3 This is a schematic diagram of the position of the hydraulic valve port part in the second situation of the working mechanism of the electromagnetic reversing valve.

[0055] The second performance of the electromagnetic reversing valve reversing working mechanism: when the right coil (10) is energized, the right armature (11), the locking nut (1), the moving long rod (22), the valve core (19), and the positioning pin (21) move to the right together, the oil supply port and the oil output port of the electromagnetic reversing valve are connected, and the oil return port is isolated. Since the valve core (19) is equipped with a sealing ring f (20) and a sealing ring e (18), the zero leakage and pressure maintenance function of the hydraulic system oil supply port and the oil output port can be achieved.

[0056] The embodiments of the present invention described above are only used to help explain the present invention. These embodiments are selected and specifically described in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification, which all belong to the protection scope of the present invention.

Claims

1. A plug-in zero-leakage electromagnetic reversing valve with position feedback function, characterized in that: It comprises a permanent magnet (4), a left armature (7), a right armature (11), a housing (12), a valve core (19), a left coil (8), a right coil (10), a moving long rod (22), and a Hall position sensor (23); The left end of the moving long rod (22) is connected to the locking nut (1), and the locking nut (1) fixes the handle (2) via a nut locking screw (3); A Hall position sensor (23) is embedded inside the handle (2) for detecting the distance between the handle and the permanent magnet (4); The moving long rod (22) is fixedly connected to the left armature (7) and the right armature (11); The moving long rod (22) is connected to the valve core (19) via a positioning pin (21); The housing (12) is provided with a support sleeve (5), a left coil (8), a magnetic conductive ring (9), and a right coil (10) in sequence from left to right, and a valve sleeve (15) is provided at the right end of the housing (12); The left coil (8) is energized to control the left armature (7) to move leftward, and at the same time drives the locking nut (1), the moving long rod (22), the valve core (19), and the positioning pin (21) to move leftward together; The right coil (10) is energized to control the right armature (11) to move rightward, and at the same time drives the locking nut (1), the moving long rod (22), the valve core (19) and the positioning pin (21) to move rightward together.

2. A plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: The housing (12) is connected to the support sleeve (5) and the valve sleeve (15) by threaded connection.

3. A plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: The valve core (19) is provided with sealing ring grooves at both ends, a sealing ring f (20) is installed in the left groove, and a sealing ring e (18) is installed in the right groove, so as to realize the connection between the isolation output oil, the oil return port and the oil supply port.

4. A plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: The outer surface of the valve sleeve (15) is provided with two sealing ring grooves, in which sealing rings c (16) and sealing rings d (17) are respectively installed, so as to realize sealing isolation between oil circuits.

5. The plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: A sealing ring a (6) is arranged on the left side of the moving long rod (22), and a sealing groove is arranged on the right side of the housing (12), in which a sealing ring b (13) is arranged.

6. A plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: When the left coil (8) is energized, the oil output port of the electromagnetic reversing valve is connected to the oil return port, and the oil supply port is isolated, thereby realizing the pressure relief and unloading function of the oil output port and the oil return circuit of the hydraulic system.

7. A plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: When the right coil (10) is energized, the oil supply port and the oil output port of the electromagnetic reversing valve are connected, and the oil return port is isolated, thereby realizing the zero leakage and pressure maintenance function of the oil supply port and the oil output port of the hydraulic system.

8. The plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: When the left coil (8) is energized, the right coil (10) is de-energized; when the left coil (8) is de-energized, the right coil (10) is energized.

9. The plug-in zero-leakage electromagnetic reversing valve with position feedback function as claimed in claim 1, characterized in that: By pulling the electromagnetic reversing valve handle (2), the reversing function of the electromagnetic reversing valve can be completed instead of the way in which the left coil (8) and the right coil (10) are energized.

10. The plug-in zero-leakage electromagnetic reversing valve with position feedback function according to claim 1, characterized in that: The Hall sensor (23) detects the position signal of the movement process of the valve core (19) in real time by sensing the size of the permanent magnet magnetic flux.

Images