Double-coil permanent magnet self-locking electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to a double-coil permanent magnet self-locking electromagnetic valve which comprises a valve seat, a valve body and a valve element, a containing groove is formed in the outer side of the valve seat in the circumferential direction, a first coil and a second coil are arranged in the containing groove, a medium outlet channel is formed in the valve seat in the axial direction, and one end of the valve seat is sequentially connected with a magnetic conduction ring, a magnetic isolation ring and the valve body. The valve body is provided with a medium inlet channel in the axial direction and comprises an armature, a permanent magnet and a sealing part, the armature is arranged in a sliding cavity defined by the valve seat and the valve body in a sliding mode, the permanent magnet is fixedly connected to the side, close to the valve seat, of the armature, the sealing part is fixed to the side opposite to the permanent magnet, and an elastic piece is arranged between the armature and the valve body and used for driving the armature to be close to the valve body. And the sealing part is propped against the medium inlet channel in a sealing manner. The utility model has the advantages of long service life, quick movement response of the valve core, energy conservation and consumption reduction.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromagnetic valve, especially relates to a double coil permanent magnet self locking electromagnetic valve. BACKGROUND

[0002] As the key element of flow path on-off control, electromagnetic valve is widely used in aerospace, automobile, medical health and other industries. Electromagnetic valve can be divided into two categories according to power supply characteristics, namely ordinary electromagnetic valve and self locking electromagnetic valve. The self locking electromagnetic valve is more and more widely used in various industries due to its energy saving and reliability.

[0003] The commonly used double coil permanent magnet self locking electromagnetic valve is roughly the same as the structure of general solenoid type electromagnetic valve, generally adopts single coil plus permanent magnet structure, the structure uses permanent magnet as constant magnetic field source to form polarized magnetic field, and the control magnetic field is formed by the forward and reverse power supply of coil, and the opening and closing and locking of electromagnetic valve are realized through the coupling structure of the double magnetic circuit structure of polarized magnetic field and control magnetic field. The single coil scheme is sensitive to the matching relationship of the maximum air gap suction force, the minimum air gap suction force and the spring force of electromagnetic valve, and has the problems of large volume, high power consumption and difficult to realize matching when the difference between the maximum air gap suction force and the minimum air gap suction force is large. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a double coil permanent magnet self locking electromagnetic valve, through control solenoid can satisfy more complex suction demand, improve the valve service life and sealing performance, solve the magnetic circuit matching difficult problem when the difference between the maximum air gap suction force and the minimum air gap suction force is large, the service life of the electromagnetic valve is long, the valve core moves fast, and energy consumption is reduced.

[0005] The above-mentioned purpose of the utility model is realized by the following technical scheme:

[0006] A double coil permanent magnet self locking electromagnetic valve, characterized by comprising a valve seat, a valve body and a valve core, the outer side of the valve seat is provided with a containing groove in the circumferential direction, the containing groove is provided with a coil one and a coil two, the valve seat is provided with a medium outlet channel in the axial direction, one end of the valve seat is sequentially connected with a magnetic conducting ring, a magnetic shielding ring and the valve body, the valve body is provided with a medium inlet channel in the axial direction, the valve body comprises an armature, a permanent magnet block and a sealing part, the armature is slidably arranged in the sliding cavity surrounded by the valve seat and the valve body, the permanent magnet block is fixedly connected to the side of the armature close to the valve seat, the sealing part is fixedly connected to the side away from the permanent magnet block, an elastic element is arranged between the armature and the valve body, and the elastic element is used for driving the armature and the valve body to be close to each other and enabling the sealing part to be sealingly abutted against the medium inlet channel.

[0007] The double coil permanent magnet self locking electromagnetic valve, wherein the coil one and the coil two are sequentially and outwardly stacked and wound in the containing groove.

[0008] The double-coil permanent magnet self-locking electromagnetic valve, wherein the sealing part comprises a sealing gasket, a groove is arranged on the armature near one end of the valve body, the sealing gasket is embedded in the groove, the sealing gasket corresponds to the medium inlet channel, and the end face of the sealing gasket protrudes from the same side of the end face of the armature.

[0009] The double-coil permanent magnet self-locking electromagnetic valve, wherein a stepped groove is arranged on the outer edge of the end face of the armature on the same side of the sealing gasket in a circumferential direction.

[0010] The double-coil permanent magnet self-locking electromagnetic valve, wherein a ring-shaped mounting groove is arranged on the armature in a circumferential direction near one side of the valve body, and the elastic member is arranged in the mounting groove.

[0011] The double-coil permanent magnet self-locking electromagnetic valve, wherein the elastic member is a tension spring, one end of the tension spring is hung on the armature, and the other end of the tension spring is hung on the valve body.

[0012] The double-coil permanent magnet self-locking electromagnetic valve, wherein a blind hole opposite to the medium outlet channel is arranged on the armature near one side of the valve seat, and a side discharge hole is arranged on the armature in a radial direction and communicates with the mounting groove and the blind hole.

[0013] The double-coil permanent magnet self-locking electromagnetic valve, wherein the side discharge hole is uniformly distributed in 2-6 on the center of the armature.

[0014] The double-coil permanent magnet self-locking electromagnetic valve, wherein a magnetic isolation sleeve is arranged between the inner side of the magnetic conducting ring and the valve seat.

[0015] The double-coil permanent magnet self-locking electromagnetic valve, wherein the permanent magnet block is annular, and the permanent magnet block is coaxially arranged with the valve body.

[0016] Therefore, the double-coil permanent magnet self-locking electromagnetic valve has the beneficial technical effects that:

[0017] The double-coil permanent magnet self-locking electromagnetic valve has the beneficial technical effects that:

[0018] By controlling the opening and closing of the magnetic core by the coil one and the coil two respectively, the coil one and the coil two can make the electromagnetic valve open or close at the moment of power-on, and the opening and closing state of the magnetic core remains unchanged after power-off, which is suitable for working conditions that need to be kept open or closed for a long time, saves energy, and has a long service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a cross-sectional view of a sealing state of a valve core and a valve body of the utility model;

[0020] Figure 2 is a cross-sectional view of a separation state of the valve core and the valve body of the utility model.

[0021] Figure 3 is Figure 2 A enlarged view of A part of the figure.

[0022] Fig. 1, valve seat; 11, accommodating groove; 12, coil one; 13, coil two; 14, medium outlet passage; 2, valve body; 21, medium inlet passage; 211, filter screen; 3, valve core; 31, armature; 311, mounting groove; 312, blind hole; 313, side discharge hole; 32, permanent magnet block; 33, sealing part; 331, sealing gasket; 332, groove; 333, stepped groove; 4, magnetic conducting ring; 5, magnetic shielding ring; 6, magnetic shielding sleeve; 7, sliding cavity; 8, elastic member; 9, shell. DETAILED DESCRIPTION

[0023] The following will be described in detail in combination with the accompanying Figures 1-3 The utility model is further described in detail.

[0024] A double-coil permanent magnet self-locking electromagnetic valve, comprising a valve seat 1, a valve body 2 and a valve core 3, the outer side of the valve seat 1 is provided with an accommodating groove 11 in the circumferential direction, the accommodating groove 11 is provided with a coil one 12 and a coil two 13, the valve seat 1 is provided with a medium outlet passage 14 in the axial direction, one end of the valve seat 1 is sequentially connected with a magnetic conducting ring 4, a magnetic shielding ring 5 and the valve body 2, the valve body 2 is provided with a medium inlet passage 21 in the axial direction, the valve body 2 comprises an armature 31, a permanent magnet block 32 and a sealing part 33, the armature 31 is slidably arranged in a sliding cavity 7 formed by the valve seat 1 and the valve body 2, the permanent magnet block 32 is fixedly connected to the side of the armature 31 close to the valve seat 1, the sealing part 33 is fixed to the side opposite to the permanent magnet block 32, an elastic member 8 is arranged between the armature 31 and the valve body 2, and the elastic member 8 is used to drive the armature 31 and the valve body 2 to be close to each other and make the sealing part 33 sealingly abut against the medium inlet passage 21.

[0025] As Figure 1 shown in the embodiment, the coil one and the coil two are sequentially overlapped and wound from inside to outside in the accommodating groove 11.

[0026] As Figure 1 shown in an embodiment, the magnetic shielding sleeve 6 is arranged between the inner side of the magnetic conducting ring 4 and the valve seat 1.

[0027] As Figure 2 , 3 shown, the sealing part 33 comprises a sealing gasket 331, the middle part of the armature 31 close to one end of the valve body 2 is provided with a groove 332, the sealing gasket 331 is embedded in the groove 332, the sealing gasket 331 corresponds to the medium inlet passage 21, and the end face of the sealing gasket 331 protrudes from the end face of the armature 31 on the same side, so that the sealing gasket 331 can better sealingly abut against the medium inlet passage 21.

[0028] The outer edge of the end face of the armature 31 on the same side of the sealing gasket 331 is provided with a stepped groove 333 in the circumferential direction. By arranging the annular stepped groove 333, the sealing gasket 331 can be better sealed against the medium inlet channel 21 on the valve body 2, and meanwhile, when the valve core 3 is opened, the medium can flow smoothly from the space between the stepped groove 333 and the valve body 2.

[0029] The annular mounting groove 311 is arranged on the side of the armature 31 close to the valve body 2 in the circumferential direction, and the elastic member 8 is arranged in the mounting groove 311.

[0030] The elastic member 8 is a tension spring, one end of which is hung on the armature 31, and the other end of which is hung on the valve body 2.

[0031] The blind hole 312 opposite to the medium outlet channel 14 is arranged on the side of the armature 31 close to the valve seat 1 in the center, and the side discharge hole 313 is arranged on the armature 31 in the radial direction and communicates the mounting groove 311 and the blind hole 312.

[0032] The side discharge hole 313 is evenly distributed in 2-6 on the center of the armature 31.

[0033] The permanent magnet block 32 is annular, and the permanent magnet block 32 is coaxially arranged with the valve body 2, and the permanent magnet block 32 is composed of an axially magnetized neodymium iron boron material.

[0034] The housing 9 is fixedly connected to the outer side of the valve seat 1 in the circumferential direction.

[0035] The filter screen 211 is arranged on the medium inlet channel 21.

[0036] The utility model discloses a kind of control methods of double-coil permanent magnet self-locking electromagnetic valve, comprising the following steps:

[0037] As Figure 1 As shown in the drawing, the initial state of the electromagnetic valve is the valve closing state, that is, the armature 31 overcomes the attraction force of the permanent magnet block 32 and the valve seat 1 under the tension of the elastic member 8, and the sealing part 33 is sealed against the medium inlet channel 21.

[0038] The coil one 12 is powered to generate electromagnetic force, and the armature 31 overcomes the tension of the elastic member 8 under the action of electromagnetic force, and the permanent magnet block 32 is attracted to the valve seat 1, and the sealing part 33 is separated from the valve body 2.

[0039] The coil one 12 is powered to generate electromagnetic force, and the armature 31 overcomes the tension of the elastic member 8 under the action of electromagnetic force, and the permanent magnet block 32 is attracted to the valve seat 1, and the sealing part 33 is separated from the valve body 2.

[0040] The coil two 13 is powered to generate electromagnetic force, and the armature 31 overcomes the attraction force of the permanent magnet block 32 and the valve seat 1 under the action of electromagnetic force and the tension of the elastic member 8, and the armature 31 moves towards the valve body 2, and the sealing part 33 is close to the valve body 2 and sealed against the medium inlet channel 21.

[0041] When coil 13 is de-energized, the tension generated by elastic element 8 overcomes the magnetic attraction between permanent magnet block 32 and valve seat 1, and the sealing part 33 on armature 31 and the medium inlet channel 21 on valve body 2 maintain a sealed state.

[0042] Coil 12 and coil 23 are control coils. By controlling them, control magnetic fields of different sizes and directions are formed. The control magnetic field and the permanent magnet 32 ​​work together to control the movement state of the valve core 3.

[0043] like Figure 2 As shown, when the valve core 3 is at the minimum magnetic gap, the medium flows along the path in the direction of the dotted line, that is, from the medium inlet channel 21 --- the sliding cavity 7 --- the mounting groove 311 --- the side drain hole 313 --- the blind hole 312 --- the medium outlet channel 14.

[0044] like Figure 1 As shown, when armature 31 is at its maximum magnetic gap, and the solenoid valve needs to be opened, coil 12 is energized. At this time, the magnetic lines of force generated by coil 12 are in the same direction as the magnetic lines of force emitted from the N pole of permanent magnet 32. After passing through the soft magnetic material, a closed magnetic circuit is formed, increasing the attractive force on armature 31. When the attractive force exceeds the tension of the elastic element, armature 31 is attracted, and the valve opens, i.e., as shown... Figure 2 As shown; when coil 12 is de-energized, the polarization magnetic field of permanent magnet block 32 has a much greater attraction than the tension of elastic element 8, ensuring that the valve can be opened reliably; permanent magnet block 32 overcomes the tension generated by elastic element 8 by its own magnetic field, so that armature 31 is kept attracted to valve seat 1.

[0045] like Figure 2 As shown, when the armature 31 is at its minimum magnetic gap and the solenoid valve needs to be closed, the coil 13 is energized. At this time, the magnetic lines of force generated by the coil 13 are opposite in direction to the magnetic lines of force emitted from the N pole of the permanent magnet 32, and after passing through the soft magnetic material, they form a closed magnetic circuit, canceling the magnetic force of the permanent magnet 32 ​​on the armature 31. The armature 31 then returns to its original position under the pulling force of the elastic element 8, i.e. Figure 1 As shown in the figure; when coil 13 is de-energized, the polarization magnetic field attraction of permanent magnet 32 ​​is much smaller than the pulling force of elastic element 8, ensuring that the valve has sufficient sealing force. The pulling force generated by elastic element 8 overcomes the attraction force between permanent magnet 32 ​​and valve seat 1, so that armature 31 maintains the maximum magnetic gap, that is, valve core 3 is maintained in the closed position.

[0046] When the armature 31 is in the position of abutting the valve seat 1 or the valve body 2, there is no need to energize the coil 12 or the coil 2 13, which can effectively reduce energy consumption. By setting the magnetic ring 4, the magnetic isolation ring 5, and the magnetic isolation sleeve 6, the magnetic force during the movement of the valve core 3 is effectively controlled, and the response time of the movement of the valve core 3 is also controlled.

[0047] The coil one 12 and the coil two 13 are stacked and wound outside the valve seat 1 along the circumference and are arranged in the accommodating groove 11, effectively saving the coil winding space, reducing the volume in the axial direction of the electromagnetic valve, and realizing the miniaturization of the electromagnetic valve.

[0048] The embodiments of the specific embodiment are the preferred embodiments of the utility model, not limited to the protection scope of the utility model, so that: all equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A double-coil permanent-magnetic self-locking electromagnetic valve, characterized by, The valve comprises a valve seat, a valve body and a valve core, the valve seat is provided with a containing groove along the circumference, the containing groove is provided with a coil one and a coil two, the valve seat is provided with a medium outlet channel along the axial direction, the valve seat is connected with a magnetic conducting ring, a magnetic shielding ring and the valve body in sequence, the valve body is provided with a medium inlet channel along the axial direction, the valve body comprises an armature, a permanent magnet block and a sealing part, the armature is slidably arranged in a sliding cavity formed by the valve seat and the valve body, the permanent magnet block is fixedly connected to the side of the armature close to the valve seat, the sealing part is fixedly connected to the side of the permanent magnet block away from the valve seat, an elastic member is arranged between the armature and the valve body, the elastic member is used to drive the armature and the valve body to be close to each other and make the sealing part sealingly abut against the medium inlet channel.

2. The dual-coil permanent-magnet latching solenoid valve according to claim 1, characterized in that, The coil one and the coil two are arranged in the containing groove in sequence from inside to outside.

3. The dual-coil permanent magnet latching solenoid valve according to claim 1, wherein The sealing part comprises a sealing gasket, the armature is provided with a groove at the middle part close to the valve body, the sealing gasket is embedded in the groove, the sealing gasket corresponds to the medium inlet channel, and the end surface of the sealing gasket protrudes from the end surface of the armature on the same side.

4. The dual-coil permanent-magnet latching solenoid valve according to claim 3, characterized in that, The end surface of the armature on the same side of the sealing gasket is provided with a stepped groove along the circumference.

5. The dual-coil permanent magnet latching solenoid valve of claim 1, wherein, The armature is provided with an annular mounting groove along the circumference on the side close to the valve body, and the elastic member is arranged in the mounting groove.

6. The dual-coil permanent-magnet latching solenoid valve according to claim 5, characterized in that, The elastic member is a tension spring, one end of the tension spring is hung on the armature, and the other end of the tension spring is hung on the valve body.

7. The dual-coil permanent magnet latching solenoid valve of claim 1, wherein, The armature is provided with a blind hole opposite to the medium outlet channel on the side close to the valve seat, and the armature is provided with a side discharge hole along the radial direction and connecting the mounting groove and the blind hole.

8. The dual-coil permanent-magnet latching solenoid valve according to claim 7, characterized in that, The side discharge hole is uniformly distributed by 2-6 along the center of the armature.

9. The dual-coil permanent magnet latching solenoid valve of claim 1, wherein, The magnetic shielding sleeve is arranged between the inner side of the magnetic conducting ring and the valve seat.

10. The dual-coil permanent-magnet latching solenoid valve according to claim 1, wherein The permanent magnet block is annular, and the permanent magnet block is coaxially arranged with the valve body.

Images