CN114593262A

CN114593262A - Electromagnetic valve

Info

Publication number: CN114593262A
Application number: CN202210305087.8A
Authority: CN
Inventors: 胡海波; 朱峰; 张勇; 潘忠林
Original assignee: Wuxi Jewel Technology Co ltd
Current assignee: Wuxi Jewel Technology Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-06-07
Anticipated expiration: 2042-03-25
Also published as: CN114593262B

Abstract

The application provides a solenoid valve belongs to solenoid valve technical field. The technical scheme that this application embodiment provided, through set up antiseized groove on the terminal surface at quiet iron core's second end, and the symmetry sets up two at least earial drainage grooves on the lateral wall of armature, make between quiet iron core and the armature and all have great space between the lateral wall of armature and accommodation space to supply the fluid to flow, can prevent because airtight and laminating between quiet iron core and the armature, thereby make both realize the flash separation based on control, avoid armature by the condition of sticking or card death, thereby make the solenoid valve can close fast. During the process of opening the electromagnetic valve, the armature moves towards the static iron core, and fluid between the static iron core and the armature can rapidly flow out through the anti-sticking groove and the drainage groove, so that impurities are prevented from accumulating around the static iron core and the armature. The electromagnetic valve based on the structure can realize sensitive switching action, can avoid causing equipment failure, and has good long-term sealing effect.

Description

Electromagnetic valve

Technical Field

The application relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve.

Background

The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, is not limited to hydraulic pressure and pneumatic pressure, and is used for adjusting the direction, the flow direction, the speed and other parameters of a medium in an industrial control system. The electromagnetic valve enables the armature to be attracted or disconnected by electrifying, and the fluid is switched on or off by power-off reset disconnection.

Disclosure of Invention

The embodiment of the application provides an electromagnetic valve, can avoid impurity to gather around quiet iron core and armature, realizes that the switching action is sensitive, avoids causing equipment trouble. The technical scheme is as follows:

there is provided a solenoid valve including: the valve comprises a valve body assembly, a coil assembly, a valve sleeve and a valve core assembly;

the valve body assembly is provided with a valve cavity, a cylindrical coil assembly is arranged in the valve cavity, the valve cavity is connected to an opening of the coil assembly, and an accommodating space of the valve core assembly is formed in the coil assembly and the valve cavity;

the side wall of the valve sleeve is provided with a flow inlet, the end part of the valve sleeve is provided with a flow outlet, and the interior of the valve sleeve is provided with a fluid channel;

the valve core assembly comprises: the static iron core, the elastic piece, the armature and the steel ball are sequentially connected and sequentially arranged in the accommodating space from inside to outside;

the first end of the static iron core is fixed at the end part of the containing space, the end surface of the second end of the static iron core is provided with an anti-sticking groove, the side wall of the armature is symmetrically provided with at least two through drainage grooves, the first end of the armature is provided with a blind hole for containing an elastic piece, and the two ends of the elastic piece are respectively fixed on the end surfaces of the anti-sticking groove of the static iron core and the blind hole of the armature;

the armature and the steel ball can slide in the accommodating space, and the steel ball is abutted to the opening of the fluid channel in the valve sleeve based on the elasticity of the elastic piece.

In one possible design, the coil assembly includes: the coil is arranged on the shell;

the valve body assembly also comprises an encapsulating plastic body and two connecting terminals;

the first end of the static iron core is fixed in the guide sleeve, the framework is fixed on the outer wall of the guide sleeve, the coil is wound on the framework, the shell covers the first end face and the side face of the coil, and the cover body covers the shell;

the plastic-coated body is coated on the outer sides of the shell and the cover body, the two wiring terminals are respectively connected with two ends of the coil, and the two wiring terminals penetrate out of the plastic-coated body.

In a possible design, the plastic-coated body has at least one ring groove on the end surface close to the valve sleeve, the bottom of the ring groove has at least one rib made of soft plastic material, and the end of the rib protrudes out of the end surface of the plastic-coated body.

In one possible design, the valve body assembly further includes: at least three reinforcing rings, this at least three reinforcing ring evenly distributed is between this shell and this plastic-covered body.

In one possible design, the valve core assembly further comprises a metal gasket, the metal gasket is detachably arranged in the valve sleeve, the outer edge of the bottom of the metal gasket is provided with a first chamfer, and an inclined surface matched with the first chamfer of the metal gasket is arranged in the valve sleeve;

the interior of the metal gasket forms the fluid channel.

In one possible design, the opening of the metal washer in contact with the steel ball has a second chamfer matching the shape of the steel ball.

In one possible design, the anti-sticking slots on the second end of the stationary core are in the shape of a cross, a radial, a stripe or a grid.

In one possible embodiment, the bottom side wall of the blind hole of the armature is provided with at least two symmetrical vent holes.

In one possible design, the vent hole is in communication with the vent channel.

In a possible design, at least two ball grooves are symmetrically arranged on the side wall of the armature, at least one ball is arranged in each ball groove, the diameter of one end, close to the static iron core, of each ball groove is smaller than that of the corresponding ball, and the end, far away from the static iron core, of each ball groove is not through.

The technical scheme that this application embodiment provided, through set up antiseized groove on the terminal surface at quiet iron core's second end, and the symmetry sets up two at least earial drainage grooves on the lateral wall of armature, make between quiet iron core and the armature and all have great space between the lateral wall of armature and accommodation space to supply the fluid to flow, can prevent because airtight and laminating between quiet iron core and the armature, thereby make both realize the flash separation based on control, avoid armature by the condition of sticking or card death, thereby make the solenoid valve can close fast. During the process of opening the electromagnetic valve, the armature moves towards the static iron core, and fluid between the static iron core and the armature can rapidly flow out through the anti-sticking groove and the drainage groove, so that impurities are prevented from accumulating around the static iron core and the armature. The electromagnetic valve based on the structure can realize sensitive switching action, can avoid causing equipment failure and has good long-term sealing effect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a solenoid valve provided in an embodiment of the present application;

FIG. 2 is a schematic front view of a solenoid valve provided in an embodiment of the present application;

FIG. 3 is a left side view schematic diagram of a solenoid valve provided in an embodiment of the present application;

FIG. 4 is a front cross-sectional view of a solenoid valve provided in an embodiment of the present application;

FIG. 5 is a left side cross-sectional view of a solenoid valve provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a stationary core 41 of a solenoid valve according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an armature 43 of a solenoid valve according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a metal gasket 45 of a solenoid valve according to an embodiment of the present disclosure.

The reference numerals for the various parts in the drawings are illustrated below:

1-a valve body assembly;

11-an inclusion body;

111-ring grooves;

112-ribs;

12-a connection terminal;

13-a reinforcement ring;

2-a coil assembly;

21-guide sleeve;

22-a backbone;

23-a coil;

24-a housing;

25-a cover body;

3-valve housing;

31-an inlet;

32-an outflow port;

33-sealing ring;

4-a valve core assembly;

41-static iron core;

411-anti-sticking groove;

42-an elastic member;

43-an armature;

431-a drainage groove;

432-blind hole;

433-a drain hole;

434-ball grooves;

435-balls;

44-steel ball;

45-metal gaskets;

451-first chamfer;

452-second chamfer.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

FIG. 1 is a schematic structural diagram of a solenoid valve provided in an embodiment of the present application; FIG. 2 is a schematic front view of a solenoid valve provided in an embodiment of the present application; FIG. 3 is a left side view schematic diagram of a solenoid valve provided in an embodiment of the present application; FIG. 4 is a front cross-sectional view of a solenoid valve provided in an embodiment of the present application;

fig. 5 is a left side sectional view of a solenoid valve provided in an embodiment of the present application, please refer to fig. 1 to 5, the solenoid valve includes: the valve comprises a valve body assembly 1, a coil assembly 2, a valve sleeve 3 and a valve core assembly 4; the valve body component 1 is provided with a valve cavity, a cylindrical coil component 2 is arranged in the valve cavity, the valve sleeve 3 is connected to an opening of the coil component 2, and an accommodating space of the valve core component 4 is formed in the coil component 2 and the valve sleeve 3; the side wall of the valve sleeve 3 is provided with a flow inlet 31, the end part of the valve sleeve 3 is provided with a flow outlet 32, and the interior of the valve sleeve 3 is provided with a fluid channel; the valve core assembly 4 comprises: the static iron core 41, the elastic piece 42, the armature 43 and the steel ball 44 are sequentially connected and sequentially arranged in the accommodating space from inside to outside; wherein, the first end of the static iron core 41 is fixed at the end of the accommodating space, the end face of the second end of the static iron core 41 is provided with an anti-sticking groove 411, the side wall of the armature 43 is symmetrically provided with at least two through drainage grooves 431, the first end of the armature 43 is provided with a blind hole 432 for accommodating the elastic element 42, and the two ends of the elastic element 42 are respectively fixed at the end faces of the anti-sticking groove 411 of the static iron core 41 and the blind hole 432 of the armature 43; the armature 43 and the steel ball 44 are slidable in the accommodation space, and the steel ball 44 abuts on an opening of a fluid passage in the valve housing 3 based on the elastic force of the elastic member 42.

The structure and the working principle of the solenoid valve are described as follows:

valve body assembly 1:

the valve body assembly 1 is used for supporting and accommodating the coil assembly 2 and the valve core assembly 4, the valve body assembly 1 is provided with a valve cavity, the cylindrical coil assembly 2 is arranged in the valve cavity, the valve sleeve 3 is connected to an opening of the coil assembly 2, and an accommodating space of the valve core assembly 4 is formed in the coil assembly 2 and the valve sleeve 3.

The coil component 2:

the coil assembly 2 is used for providing a magnetic field for the valve core assembly 4, and the valve core assembly 4 moves through the change of the magnetic field, so that the electromagnetic valve is opened or closed.

Valve housing 3:

the side wall of the valve housing 3 is provided with an inlet 31, the end of the valve housing 3 is provided with an outlet 32, and the interior of the valve housing 3 is provided with a fluid passage.

On one hand, after the valve core assembly 4 is installed in the coil assembly 2, the valve core assembly 4 is fixed through the valve sleeve 3, and on the other hand, the on-off of the electromagnetic valve is realized through the movement of the valve core assembly 4 relative to the valve sleeve 3.

The valve core assembly 4:

the valve core assembly 4 comprises: the static iron core 41, the elastic member 42, the armature 43 and the steel ball 44 are sequentially connected and sequentially arranged in the accommodating space from inside to outside. When the coil 23 is energized, the stationary core 41 and the energized coil 23 form a magnet, which can attract the armature 43, and the solenoid valve is opened and closed by the movement of the armature 43.

The stationary iron core 41:

fig. 6 is a schematic structural diagram of a stationary core 41 of an electromagnetic valve according to an embodiment of the present application, please refer to fig. 6, the stationary core 41 is an iron cylindrical component, a first end of the stationary core 41 is fixed at an end of the accommodating space, an anti-sticking groove 411 is formed on an end surface of a second end of the stationary core 41, the anti-sticking groove 411 has a certain depth, so as to prevent small impurities in a fluid from being accumulated on the end surface, prevent the stationary core 41 and an armature 43 from being stuck, and prevent the armature 43 from being stuck or jammed, so that the electromagnetic valve can be quickly closed.

Armature 43:

fig. 7 is a schematic structural diagram of an armature 43 of an electromagnetic valve according to an embodiment of the present application, please refer to fig. 7, where at least two through drainage grooves 431 are symmetrically disposed on a side wall of the armature 43, a first end of the armature 43 has a blind hole 432 for receiving the elastic member 42, and the two drainage grooves 431 are used to prevent the static core 41 and the armature 43 from being adhered to each other, so that when the valve cavity is closed, fluid in the valve cavity can flow back to the outflow port 32 through the drainage grooves 431 in time, and a decrease in the cavity, which causes an increase in fluid pressure, and retards the actuation of the armature 43, which causes a delay in the opening of the valve. Small impurities in the fluid can flow down and be discharged from the drainage groove 431 of the armature 43 in each movement of the armature 43, so that the long-term stable movement of the armature 43 is ensured not to be blocked, the condition that the armature 43 is stuck or jammed is avoided, and the electromagnetic valve can be quickly closed.

The elastic member 42:

the two ends of the elastic member 42 are respectively fixed on the anti-sticking slot 411 of the static iron core 41 and the end face of the blind hole 432 of the armature 43, and are used for applying thrust to the armature 43 based on the elastic force of the elastic member 42 when the armature 43 is not acted by electromagnetic force, so that the armature 43 and the steel ball 44 are abutted to the opening of the fluid channel in the valve sleeve 3.

Steel ball 44:

the armature 43 and the steel ball 44 are fixedly connected, and specifically, the bottom of the armature 43 may be provided with a groove adapted to the steel ball 44, so as to fix the steel ball 44 in the groove.

The armature 43 and the steel ball 44 are slidable in the accommodation space, and the steel ball 44 abuts against the opening of the fluid passage in the valve housing 3 based on the elastic force of the elastic member 42. The ball 44 is spherical in shape to facilitate quick opening or abutment against the opening of the fluid passage.

The electromagnetic valve is suitable for general media, and the media in the electromagnetic valve can be liquid, gas and other fluids, so that the electromagnetic valve can be applied to various scenes, for example, the electromagnetic valve can be applied to a new energy automobile using hydrogen as an energy source, and can be used as a metering valve or a control valve in a hydrogen conveying pipeline and the like.

The technical scheme that this application embodiment provided, through set up antiseized groove 411 on the terminal surface at the second end of quiet iron core 41, and the symmetry sets up two at least discharge chutes 431 on the lateral wall of armature 43, make between quiet iron core 41 and armature 43 and all have great space between the lateral wall of armature 43 and accommodation space to supply the fluid flow, can prevent to laminate because airtight between quiet iron core 41 and the armature 43, thereby make both can realize quick separation based on control, avoid armature 43 by the condition of sticking or sticking, thereby make the solenoid valve can close fast. During the process of opening the solenoid valve, the armature 43 moves toward the stationary core 41, and the fluid between the stationary core 41 and the armature 43 can rapidly flow out through the anti-sticking groove 411 and the drainage groove 431, so as to avoid the accumulation of impurities around the stationary core 41 and the armature 43. The electromagnetic valve based on the structure can realize sensitive switching action, can avoid causing equipment failure, and has good long-term sealing effect.

The specific structure and operation principle of the solenoid valve are described as follows:

valve body assembly 1 and coil assembly 2:

in one possible design, the coil assembly 2 includes: the guide sleeve 21, the framework 22, the coil 23, the shell 24 and the cover 25; the valve body assembly 1 comprises an encapsulating body 11 and two connecting terminals 12; the first end of the static iron core 41 is fixed in the guide sleeve 21, the framework 22 is fixed on the outer wall of the guide sleeve 21, the coil 23 is wound on the framework 22, the shell 24 is coated on one end face 231 and the side face of the coil 23, and the cover body 25 is covered on the shell 24; the plastic-coated body 11 is coated on the outer sides of the shell 24 and the cover 25, the two connecting terminals 12 are respectively connected to two ends of the coil 23, and the two connecting terminals 12 penetrate out of the plastic-coated body 11.

In the structure, the guide sleeve 21, the static iron core 41 and the valve sleeve 3 can be connected by adopting a continuous laser welding sealing technology, so that the problem of reliability of connection and air tightness is solved, two sealing rings are saved compared with other valves in design, and the cost is reduced.

In the structure, the plastic-coated body 11 is integrally formed through an injection molding process and is used for protecting the internal structure.

The coil assembly 2 comprises a framework 22, an aligned coil 23 is uniformly wound on the framework 22, the coil 23 is connected with two connecting terminals 12 in a resistance welding mode to form the coil 23, and the coil 23 is fixed by a metal shell 24 and a cover body 25 in a press riveting mode. The wound coil 23 and the connecting terminal 12 are precisely resistance welded, and a closed magnetic circuit is formed after the magnetic conductive shell 24 and the magnetic conductive cover 25 are assembled, because the windings are arranged in an array, the dimensions of the precisely punched shell 24 and the cover 25 are stable, the magnetic field of the formed magnetic circuit is stable, and the magnetic flux is stable.

The coil 23 may be a high-temperature enameled wire, and is wound on the bobbin 22 neatly and uniformly.

In a possible design, the plastic-covered body 11 has at least one ring groove 111 on the end surface close to the valve sleeve 3, the bottom of the ring groove 111 has at least one ring of ribs 112, and the end of the ribs 112 slightly protrudes from the end surface of the plastic-covered body 11.

Specifically, an annular rib 112 in the shape of a plastic sharp tooth is formed when the plastic-covered body 11 is subjected to injection molding, and the ring of sharp teeth is slightly higher than the bottom plane of the plastic-covered body 11, so that the ring of sharp teeth can be crushed to form a sealed space when the electromagnetic valve and the cylinder body are installed, dust and moisture in the external environment can be effectively prevented from entering, meanwhile, the cost of using a sealing gasket is avoided, and low-cost dust prevention and water prevention are realized.

In one possible design, the valve body assembly 1 further comprises: at least three reinforcing rings 13, the at least three reinforcing rings 13 being evenly distributed between the outer shell 24 and the plastic-covered body 11.

Specifically, the height of the reinforcing ring 13 may be 10-12mm, for example, 11mm, and the 3 reinforcing rings 13 with the height of 11mm are fixed on the cylinder body or the valve seat of the fluid flow path after being coated with plastic, and can bear the pressure of 20bar for a long time.

Valve sleeve 3:

in a possible design, the side wall of the valve housing 3 is provided with at least one sealing groove, in which a sealing ring 33 is arranged.

The sealing ring 33 replaces an outlet end face sealing gasket, the radial air tightness of the valve can be ensured through the sealing ring 33, the installation process of the valve only needs to control the concentricity, the control process of the axial height is simplified, the process is simple, and the air tightness of the product is easier to ensure. Based on the structure, the inlet 31 does not need to be provided with a filter screen, so that the pressure loss caused by the filter screen can be reduced. Correspondingly, the filter screen can be arranged at the outlet of an oil pump or other medium pumps and used for filtering the fluid and reducing impurities in the fluid.

The valve core assembly 4:

the stationary iron core 41:

in a possible design, the anti-sticking slot 411 on the second end of the static iron core 41 is in a cross shape, a radial shape, a stripe shape or a grid shape, that is, the anti-sticking slot 411 is in a centrosymmetric or axisymmetric shape and can equally divide the area of the end face, so that the armature 43 is stressed in all directions uniformly when in contact, and the motion clamping stagnation caused by the local abrasion of the top of the armature 43 is prevented by utilizing the stress balance of the armature 43.

The elastic member 42:

the elastic part 42 is a spring, is made of stainless steel SUS631-WPC-10SJ, is closed at two ends and is wound flat, so that the force for pushing the armature iron 43 can be ensured to be vertical and stable, and the elastic part 42 can ensure the extension life of more than 1 hundred million times.

Armature 43:

with continued reference to fig. 7, in a possible design, at least two symmetrical drain holes 433 are formed on a bottom side wall of the blind hole 432 of the armature 43, for allowing the fluid in the blind hole 432 to quickly flow out of the armature 43 through the drain holes 433 when the fluid is pressurized, so as to avoid the increase of the fluid pressure caused by the decrease of the cavity, and prevent the armature 43 from being stuck to cause the delay of the valve opening.

In a possible design, the drainage hole 433 is communicated with the drainage groove 431, so that the fluid flowing out through the drainage hole 433 can be quickly discharged out of the valve cavity through the drainage groove 431, and the phenomenon that the pressure of the fluid rises due to the reduction of the cavity and the attraction of the armature 43 is retarded, so that the valve opening is delayed is further avoided.

With continued reference to fig. 6, in a possible design, at least two ball grooves 434 are symmetrically disposed on a side wall of the armature 43, an end of the ball groove 434 close to the static iron core 41 is not through, at least one ball 435 is disposed in each ball groove 434, a diameter of the end of the ball groove 434 close to the static iron core 41 is smaller than a diameter of the ball 435, and an end of the ball groove 434 away from the static iron core 41 is not through. Because the armature 43 is at a certain distance from the inner wall of the valve cavity, the ball 435 has the function of righting the armature 43 by being supported on the inner wall of the valve cavity, so that the concentricity of the armature 43 and the valve cavity is ensured, meanwhile, the ball can play a role of reducing the moving resistance of the armature 43 by rolling, is beneficial to the armature 43 to quickly move along the axial direction in the valve cavity, ensures the balance of the movable core, reduces the sliding resistance and improves the response speed. For example, the number of the ball grooves 434 may be 3 to 5, and are uniformly distributed on the side wall of the armature 43 in the circumferential direction.

Steel ball 44:

the armature 43 and the steel ball 44 are connected through a rivet joint to control the opening and closing of the fluid flow path. The armature 43 and the steel ball 44 are connected reliably through riveting.

Referring to fig. 8, fig. 8 is a schematic structural view of a metal washer 45 of a solenoid valve provided in an embodiment of the present application, in a possible design, the valve core assembly 4 further includes a metal washer 45, the metal washer 45 is detachably disposed in the valve housing 3, a bottom outer edge of the metal washer 45 has a first chamfer 451, and the valve housing 3 has a slope adapted to the first chamfer 451 of the metal washer 45; the interior of the metal gasket 45 forms the fluid passage.

The first chamfer 451 on the lower end surface of the metal washer 45 is engaged with the inclined surface inside the valve housing 3, thereby ensuring good sealing performance and preventing leakage.

In one possible design, the opening of the metal washer 45 that contacts the steel ball 44 has a second chamfer 452 that matches the profile of the steel ball 44.

The spherical surface of the steel ball 44 is matched with the central C angle of the metal gasket 45 to form ball valve type contact, and under the thrust of the elastic piece 42, the spherical surface can be tightly matched with the C angle to prevent leakage and well ensure the air tightness of combination.

Based on the above structure, under the condition of no electricity, the elastic piece 42 pushes the armature 43 and the steel ball 44 to seal the inner diameter of the metal gasket 45, so that the fluid flow path from the inlet 31 to the outlet 32 is blocked, and at the moment, the electromagnetic valve is in a closed state, and the fluid flow path is closed. After the power supply is connected to the terminal 12, the coil assembly 2 and the valve core assembly 4 generate electromagnetic force, the armature 43 is subjected to upward electromagnetic force, and the electromagnetic force is greater than the thrust of the elastic piece 42 and the self weight of the armature 43 and the steel ball 44, the armature 43 drives the steel ball 44 to rise, the elastic piece 42 is compressed, the inner diameter of the metal gasket 45 is opened, the fluid in the inlet 31 flows out from the outlet 32 through the inner diameter of the metal gasket 45, at this time, the electromagnetic valve is in an open state, and the fluid flow path is conducted.

The technical scheme that this application embodiment provided, through set up antiseized groove 411 on the terminal surface at the second end of quiet iron core 41, and the symmetry sets up two at least discharge chutes 431 on the lateral wall of armature 43, make between quiet iron core 41 and armature 43 and all have great space between the lateral wall of armature 43 and accommodation space to supply the fluid flow, can prevent to laminate because airtight between quiet iron core 41 and the armature 43, thereby make both can realize quick separation based on control, avoid armature 43 by the condition of sticking or sticking, thereby make the solenoid valve can close fast. During the opening of the solenoid valve, the armature 43 moves toward the stationary core 41, and the fluid between the stationary core 41 and the armature 43 can rapidly flow out through the anti-sticking groove 411 and the drainage groove 431, so that the impurities are prevented from accumulating around the stationary core 41 and the armature 43. The electromagnetic valve based on the structure can realize sensitive switching action, can avoid causing equipment failure and has good long-term sealing effect.

The device has the advantages of compact structure, low cost and stable and reliable work; the response speed is high, and the on-off response time is less than 10 ms; the mechanical strength is high, the pressure of 20bar can be resisted to the maximum extent, and the test of 50g acceleration can be borne; the working voltage range is wide and is 10-32 VDC; the flow is stable, and the bearing flow is more than 600 g/min; the opening and closing are stable, the pressure drop of an inlet and an outlet is less than 0.2bar under the pressure of 10bar, the air tightness is good, and the maximum leakage amount is less than 0.01 ml/min.

All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described herein again.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A solenoid valve, characterized in that it comprises: the valve comprises a valve body assembly (1), a coil assembly (2), a valve sleeve (3) and a valve core assembly (4);

the valve body assembly (1) is provided with a valve cavity, a cylindrical coil assembly (2) is arranged in the valve cavity, the valve sleeve (3) is connected to an opening of the coil assembly (2), and an accommodating space of the valve core assembly (4) is formed in the coil assembly (2) and the valve sleeve (3);

the side wall of the valve sleeve (3) is provided with a flow inlet (31), the end part of the valve sleeve (3) is provided with a flow outlet (32), and the interior of the valve sleeve (3) is provided with a fluid channel;

the valve core assembly (4) comprises: the iron core comprises a static iron core (41), an elastic piece (42), an armature (43) and a steel ball (44), wherein the static iron core (41), the elastic piece (42), the armature (43) and the steel ball (44) are sequentially connected and are sequentially arranged in the accommodating space from inside to outside;

the first end of the static iron core (41) is fixed at the end of the accommodating space, an anti-sticking groove (411) is formed in the end face of the second end of the static iron core (41), at least two through drainage grooves (431) are symmetrically formed in the side wall of the armature (43), a blind hole (432) used for accommodating an elastic piece (42) is formed in the first end of the armature (43), and two ends of the elastic piece (42) are respectively fixed on the end faces of the anti-sticking groove (411) of the static iron core (41) and the blind hole (432) of the armature (43);

the armature (43) and the steel ball (44) are capable of sliding in the accommodating space, and the steel ball (44) abuts against an opening of a fluid passage in the valve housing (3) based on the elastic force of the elastic member (42).

2. Solenoid valve according to claim 1, characterized in that said coil assembly (2) comprises: the device comprises a guide sleeve (21), a framework (22), a coil (23), a shell (24) and a cover body (25);

the valve body assembly (1) comprises an encapsulating body (11) and two wiring terminals (12);

the first end of the static iron core (41) is fixed in the guide sleeve (21), the framework (22) is fixed on the outer wall of the guide sleeve (21), the coil (23) is wound on the framework (22), the shell (24) covers one end face (231) and the side face of the coil (23), and the cover body (25) covers the shell (24);

the plastic-coated body (11) is coated on the outer sides of the shell (24) and the cover body (25), the two wiring terminals (12) are respectively connected with two ends of the coil (23), and the two wiring terminals (12) penetrate out of the plastic-coated body (11).

3. The electromagnetic valve according to claim 2, characterized in that the plastic-coated body (11) has at least one ring groove (111) on its end surface near the valve sleeve (3), the bottom of the ring groove (111) has at least one rib (112) made of soft plastic material, and the end of the rib (112) protrudes from the end surface of the plastic-coated body (11).

4. The solenoid valve according to claim 2, characterized in that said valve body assembly (1) further comprises: at least three reinforcing rings (13), the at least three reinforcing rings (13) being evenly distributed between the outer shell (24) and the overmold (11).

5. The solenoid valve according to claim 1, characterized in that the valve core assembly (4) further comprises a metal washer (45), the metal washer (45) is detachably arranged in the valve sleeve (3), the bottom outer edge of the metal washer (45) is provided with a first chamfer (451), and the valve sleeve (3) is internally provided with a slope matched with the first chamfer (451) of the metal washer (45);

the interior of the metal gasket (45) forms the fluid channel.

6. The solenoid valve according to claim 5, characterized in that the opening of the metal washer (45) in contact with the steel ball (44) has a second chamfer (452) adapted to the profile of the steel ball (44).

7. The solenoid valve according to claim 1, characterized in that the anti-sticking slots (411) on the second end of the static core (41) have the shape of a cross, a radial, a stripe or a grid.

8. The solenoid valve according to claim 1, characterized in that the bottom side wall of the blind hole (432) of the armature (43) is provided with at least two symmetrical drain holes (433).

9. The solenoid valve according to claim 8, characterized in that said drain hole (433) is in communication with said drain groove (431).

10. The electromagnetic valve according to claim 1, characterized in that at least two ball grooves (434) are symmetrically arranged on the side wall of the armature (43), at least one ball (435) is arranged in each ball groove (434), the diameter of one end of the ball groove (434) close to the static iron core (41) is smaller than that of the ball (435), and the end of the ball groove (434) far away from the static iron core (41) is not through.