Solenoid valve

Abstract

The invention provides an electromagnetic valve, relates to the technical field of electromagnetic valves, and aims to solve the problems of low control precision, poor reliability and the like of the electromagnetic valve in the related technology. The electromagnetic valve comprises a first cover body and at least one second cover body; a driving stator yoke, a driving piece, an ejector rod assembly and a driving coil assembly are arranged in the first cover body, a magnetic piece, a counteracting stator yoke and a counteracting coil assembly are arranged in the second cover body, the counteracting stator yoke is connected to the second cover body, when the electromagnetic valve receives a valve opening signal, part of the driving coil assembly and part of the counteracting coil assembly are powered on, and the driving piece moves in the first direction; the first flow guide pipe and the second flow guide pipe are aligned and communicated in the first direction; when the electromagnetic valve receives a valve closing signal, part of the driving coil assembly and part of the counteracting coil assembly are powered on, and the first flow guide pipe and the second flow guide pipe are staggered in the second direction. The control precision of the electromagnetic valve is improved, and the reliability of the electromagnetic valve is improved.

Description

Technical Field

[0001] This application relates to the technical field of solenoid valves, and particularly to a solenoid valve. Background Art

[0002] A solenoid valve is an industrial device controlled by electricity magnetism, and is an electromagnetic actuating element that converts electromagnetic energy into mechanical energy. By simply manipulating the energization of the coil with a logic pulse command, and using electromagnetic suction to achieve fast and stable opening and closing actions, it has the characteristics of fast response speed, low power consumption, switch bistability, simple assembly, etc. It is usually used in industrial automation systems to precisely and quickly control the flow of fluid media, controlling the inlet and outlet, flow rate, pressure, and direction of liquids or gases.

[0003] In related technologies, solenoid valves generally adopt direct-acting solenoid valves, axial-flow solenoid valves or self-locking solenoid valves. However, the control accuracy of the above solenoid valves is relatively low, and the reliability of the solenoid valves is poor. Summary of the Invention

[0004] An embodiment of this application provides a solenoid valve, which helps to improve the control accuracy of the solenoid valve and enhance the reliability of the solenoid valve.

[0005] To achieve the above object, an embodiment of this application provides a solenoid valve, including a first housing and at least one second housing, the second housing is connected to the side of the first housing, and a first diversion pipe is provided on the first housing;

[0006] A driving stator yoke, a driving member, a push rod assembly and a driving coil group are arranged in the first housing, the driving stator yoke is connected to the first housing, the push rod assembly passes through the driving stator yoke and is connected to the driving member, the driving coil group is wound around the outer periphery of the driving stator yoke, a second diversion pipe is provided on the driving member, and the extending direction of the second diversion pipe is parallel to the extending direction of the first diversion pipe;

[0007] A magnetic member, a counteracting stator yoke and a counteracting coil group are arranged in the second housing, the counteracting stator yoke is connected to the second housing, the magnetic member is arranged at one end of the counteracting stator yoke facing the push rod assembly, and the counteracting coil group is wound around the outer periphery of the counteracting stator yoke;

[0008] When the solenoid valve receives an open valve signal, part of the driving coil group and part of the counteracting coil group are both energized, the driving member moves in a first direction, and the first diversion pipe and the second diversion pipe are aligned and communicated in the first direction;

[0009] When the solenoid valve receives a close valve signal, part of the driving coil group and part of the counteracting coil group are both energized, the driving member moves in a second direction, and the first diversion pipe and the second diversion pipe are misaligned in the second direction;

[0010] Wherein, the first direction and the second direction are two opposite directions and intersect with the extending directions of the first diversion tube and the second diversion tube.

[0011] In a possible implementation manner, the second cover body includes a first sub-cover body and a second sub-cover body, and the first sub-cover body and the second sub-cover body are connected to opposite sides of the first cover body along the first direction;

[0012] A first magnetic member, a first cancellation stator yoke and a first cancellation coil are arranged in the first sub-cover body, the first magnetic member is arranged in the first cancellation stator yoke, and the first cancellation coil is wound around the outer periphery of the first cancellation stator yoke;

[0013] A second magnetic member, a second cancellation stator yoke and a second cancellation coil are arranged in the second sub-cover body, the second magnetic member is arranged in the second cancellation stator yoke, and the second cancellation coil is wound around the outer periphery of the second cancellation stator yoke.

[0014] In a possible implementation manner, the driving stator yoke includes a first driving stator yoke and a second driving stator yoke, and the first driving stator yoke and the second driving stator yoke are connected to opposite ends of the first cover body along the first direction;

[0015] The ejector rod assembly includes a first ejector rod and a second ejector rod. The first ejector rod passes through the first driving stator yoke and is connected to one end of the driving member, and the second ejector rod passes through the second driving stator yoke and is connected to the other end of the driving member;

[0016] The driving coil group includes a first driving coil and a second driving coil. The first driving coil is wound around the outer periphery of the first driving stator yoke, and the second driving coil is wound around the outer periphery of the second driving stator yoke.

[0017] In a possible implementation manner, when the solenoid valve is in the closed valve state, neither the driving coil group nor the cancellation coil group is powered on;

[0018] The first ejector rod is attracted to the first magnetic member and jointly forms a permanent magnet closed magnetic circuit with the first cancellation stator yoke and the first sub-cover body, and generates a first permanent magnet magnetic flux. The first ejector rod is fixedly connected to the driving member, and the solenoid valve is in the closed valve self-locking state;

[0019] Wherein, the first diversion tube and the second diversion tube are misaligned in the second direction.

[0020] In a possible implementation, when the solenoid valve is in the closed valve state and receives an open valve signal, both the second drive coil and the first cancellation coil are energized, and both the first drive coil and the second cancellation coil are de-energized; the magnitudes of the first cancellation coil and the first permanent magnetic flux are equal and their directions are opposite;

[0021] Under the action of the second drive coil, the drive member moves in the second direction, and the first diversion pipe and the second diversion pipe are aligned and communicated in the first direction.

[0022] In a possible implementation, when the solenoid valve is in the open valve state, the second drive coil is continuously energized, the drive member continuously moves in the second direction, the drive member is attracted to the second drive stator yoke, the second ejector rod is attracted to the second magnetic member, and together with the second cancellation stator yoke and the second sub-housing, a permanent magnetic closed magnetic circuit is formed and a second permanent magnetic flux is generated; the second ejector rod is fixedly connected to the drive member, and the solenoid valve is in the open valve self-locking state;

[0023] Wherein, the first diversion pipe and the second diversion pipe remain aligned and communicated in the first direction.

[0024] In a possible implementation, when the solenoid valve is in the open valve state and receives a closed valve signal, both the first drive coil and the second cancellation coil are energized, both the second drive coil and the first cancellation coil are de-energized, and the magnitudes of the second cancellation coil and the second permanent magnetic flux are equal and their directions are opposite;

[0025] Under the action of the first drive coil, the drive member moves in the first direction, and the first diversion pipe and the second diversion pipe are misaligned in the first direction.

[0026] In a possible implementation, it further includes a winding bracket, the winding bracket is connected to the first housing, and the drive coil group is wound around the outer periphery of the drive stator yoke through the winding bracket.

[0027] In a possible implementation, along the first direction or the second direction, one of the winding bracket and the drive member is provided with a guide slide, and the other of the winding bracket and the drive member is provided with a guide chute;

[0028] When the drive member moves in the first direction or the second direction, the guide slide slides in the guide chute.

[0029] In a possible implementation, an assembly groove is formed in the cancellation stator yoke, and the magnetic member is installed in the assembly groove;

[0030] The solenoid valve further includes a buffer member, which is installed in the assembly groove and surrounds the outer periphery of the magnetic member.

[0031] On the one hand, for the solenoid valve provided by the embodiment of the present application, a first diversion pipe is provided on the first cover body, and a second diversion pipe is provided in the driving member. By controlling the left and right suction of the driving member, the opening and closing moments and the length of the opening and closing time of the valve can be adjusted, so as to realize the function of quickly and accurately controlling the quantity and law of the fluid medium. On the other hand, the present application uses two driving coils to independently control the opening and closing of the valve body. Compared with the conventional reaction spring used in the solenoid valve, it has the advantages of simple structure, convenient assembly, no need for maintenance, and the same fast speed of opening and closing the valve, and can meet the requirements of accurately controlling the inlet and outlet, flow rate, pressure and direction of liquid or gas. On the other hand, the present application uses two magnetic members to replace the conventional reaction spring to maintain the two states of opening and closing of the valve, solving the problems that the conventional solenoid valve needs to overcome the spring reaction force during the suction process, resulting in the inability to balance the holding force and the suction force, and the valve does not need to be continuously energized when maintaining the open state, having the advantages of fast steady-state switching speed, no heat generation, low power consumption and energy saving. On the other hand, the present application uses two driving coils in cooperation with two cancellation coils and two permanent magnets to achieve fast and accurate response and stable holding of the valve. The overall structure is symmetrically arranged, and the opening and closing of the valve are independently controlled, having the advantages of large steady-state position holding force, strong anti-interference ability, no coupling in state conversion, and simple control logic.

[0032] The structure of the present application and its other application purposes and beneficial effects will become more obvious and understandable through the description of the preferred embodiments in conjunction with the drawings. Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic structural diagram of the solenoid valve provided by the embodiment of the present application;

[0035] Figure 2 It is a schematic structural diagram of the solenoid valve provided by the embodiment of the present application in the closed valve self-locking state;

[0036] Figure 3 It is a schematic structural diagram of the solenoid valve provided by the embodiment of the present application in the closed valve energized state;

[0037] Figure 4 It is a schematic structural diagram of the solenoid valve provided by the embodiment of the present application in the open valve self-locking state;

[0038] Figure 5 This is a schematic structural diagram of the solenoid valve provided by the embodiment of the present application when the valve is opened and energized.

[0039] Explanation of the reference numerals in the drawings:

[0040] 100 - First cover body; 110 - First diversion pipe; 120 - Coil winding bracket; 121 - Guide chute;

[0041] 200 - Second cover body; 210 - First sub - cover body; 220 - Second sub - cover body;

[0042] 300 - Driving stator yoke; 310 - First driving stator yoke; 320 - Second driving stator yoke;

[0043] 400 - Driving member; 410 - Second diversion pipe; 420 - Guide sliding table;

[0044] 500 - Thumb - rod assembly; 510 - First thumb - rod; 520 - Second thumb - rod;

[0045] 600 - Driving coil group; 610 - First driving coil; 620 - Second driving coil;

[0046] 700 - Magnetic part; 710 - First magnetic part; 720 - Second magnetic part;

[0047] 800 - Canceling stator yoke; 810 - First canceling stator yoke; 820 - Second canceling stator yoke; 830 - Assembly groove;

[0048] 900 - Canceling coil group; 910 - First canceling coil; 920 - Second canceling coil;

[0049] 1000 - Buffer part. Detailed implementation manners

[0050] During the use of current direct - acting solenoid valves and axial - flow solenoid valves, it is necessary to continuously energize the coil. This increases the energy consumption of the solenoid valve, causes serious heating of the coil, increases the coil resistance value, reduces the current, and correspondingly reduces the ampere - turns, resulting in a reduction in electromagnetic attraction, lower reliability and shorter life of the solenoid valve, and lower control accuracy of the solenoid valve; during the use of self - locking solenoid valves, due to the presence of the spring, when maintaining the two stable states and switching between the two stable states, it is necessary to overcome the elastic force of the reaction spring. Therefore, there are disadvantages such as a smaller output force, a slower valve closing response, and a larger reverse coil current required during the stable - state conversion.

[0051] Based on the above technical problems, an embodiment of the present application provides a solenoid valve. On the one hand, a first diversion pipe is provided on the first cover body, and a second diversion is provided in the driving member. The opening and closing time and the length of the opening and closing time of the valve can be adjusted by controlling the left and right suction of the driving member, so as to realize the function of quickly and accurately controlling the quantity and law of the fluid medium. On the other hand, the present application uses two driving coils to independently control the opening and closing of the valve body. Compared with the counter-force spring used in the conventional solenoid valve, it has the advantages of simple structure, convenient assembly, no need for maintenance, and the same fast speed of opening and closing the valve, and can meet the requirements of accurately controlling the inlet and outlet, flow rate, pressure and direction of liquid or gas. On the other hand, the present application uses two magnetic members to replace the conventional counter-force spring to maintain the two states of opening and closing of the valve, solves the problems that the conventional solenoid valve needs to overcome the spring counter-force during the suction process, resulting in the inability to balance the holding force and the suction force, and the valve does not need to be continuously energized when maintaining the open state, and has the advantages of fast steady-state switching speed, no heat generation, low power consumption and energy saving. On the other hand, the present application uses two driving coils in cooperation with two cancellation coils and two permanent magnets to realize the fast and accurate response and stable holding of the valve. The overall structure is symmetrically arranged, and the opening and closing of the valve are independently controlled, and has the advantages of large steady-state position holding force, strong anti-interference ability, no coupling in state conversion, and simple control logic.

[0052] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0053] Refer to Figure 1 As shown, an embodiment of the present application provides a solenoid valve, which includes a first cover body 100 and at least one second cover body 200, and the second cover body 200 is connected to the side of the first cover body 100.

[0054] Among them, the connection method of the second cover body 200 and the first cover body 100 is not limited. Exemplarily, the second cover body 200 and the first cover body 100 can be welded, bonded or snap-connected. This embodiment does not limit this.

[0055] Among them, the number of the second cover bodies 200 is not limited. In this embodiment, mainly two second cover bodies 200 are taken as an example for illustration. Specifically, refer to Figure 1 As shown, the second cover body 200 may include a first sub-cover body 210 and a second sub-cover body 220, and the first sub-cover body 210 and the second sub-cover body 220 are connected to opposite sides of the first cover body 100 along the first direction.

[0056] Among them, the first sub-housing 210 and the second sub-housing 220 can be symmetrically arranged. Such a design makes the overall assembly simpler, the opening and closing valve actions are independent of each other, the state conversion has no coupling, and it has advantages such as a large steady-state position holding force and strong anti-interference ability.

[0057] In the embodiment of the present application, with reference to Figure 1 As shown, a first diversion pipe 110 is provided on the first housing 100. A driving stator yoke 300, a driving member 400, a push rod assembly 500, and a driving coil group 600 are arranged in the first housing 100. The driving stator yoke 300 is connected to the first housing 100. The push rod assembly 500 passes through the driving stator yoke 300 and is connected to the driving member 400. The driving coil group 600 is wound around the outer periphery of the driving stator yoke 300. A second diversion pipe 410 is provided in the driving member 400, and the extending direction of the second diversion pipe 410 is parallel to the extending direction of the first diversion pipe 110.

[0058] Among them, there are no restrictions on the opening method and opening position of the first diversion pipe 110. Exemplarily, a groove can be provided in the first housing 100, and the groove forms the first diversion pipe 110; alternatively, a pipe can also be separately installed in the first housing 100, and there are no restrictions on this in this embodiment. Similarly, there are no restrictions on the opening method and opening position of the second diversion pipe 410.

[0059] Among them, there are no restrictions on the type of the driving member 400. Exemplarily, the driving member 400 in this embodiment can be a moving iron core.

[0060] In the embodiment of the present application, with reference to Figure 1 As shown, a magnetic member 700, a canceling stator yoke 800, and a canceling coil group 900 can be arranged in the second housing 200. The canceling stator yoke 800 is connected to the second housing 200. The magnetic member 700 is arranged at one end of the canceling stator yoke 800 facing the push rod assembly 500. The canceling coil group 900 is wound around the outer periphery of the canceling stator yoke 800.

[0061] Among them, there are no restrictions on the type of the magnetic member 700. Exemplarily, the magnetic member 700 in this embodiment can be a permanent magnet.

[0062] Among them, the canceling coil group 900 is wound around the outer periphery of the canceling stator yoke 800. In this way, the magnetic leakage phenomenon can be effectively reduced. By generating a canceling magnetic field opposite to the driving magnetic field, the canceling coil group 900 can limit the diffusion of magnetic flux, thereby improving the efficiency of the magnetic circuit.

[0063] The working states of opening and closing the solenoid valve provided in this embodiment are as follows:

[0064] When the solenoid valve receives an open-valve signal, a part of the drive coil group 600 and a part of the cancellation coil group 900 are both energized, the drive member 400 moves in the first direction (horizontally to the right), and the first diversion pipe 110 and the second diversion pipe 410 are aligned and communicated in the first direction.

[0065] Among them, the state where the first diversion pipe 110 and the second diversion pipe 410 are aligned and communicated in the first direction can be referred to Figure 4 and Figure 5 as shown.

[0066] When the solenoid valve receives a close-valve signal, a part of the drive coil group 600 and a part of the cancellation coil group 900 are both energized, the drive member 400 moves in the second direction (horizontally to the left), and the first diversion pipe 110 and the second diversion pipe 410 are misaligned in the second direction.

[0067] Among them, the state where the first diversion pipe 110 and the second diversion pipe 410 are misaligned in the second direction can be referred to Figure 2 and Figure 3 as shown.

[0068] Among them, the first direction and the second direction are two opposite directions and intersect with the extending directions of the first diversion pipe 110 and the second diversion pipe 410.

[0069] It should be noted that in this embodiment, the first direction is the direction of moving to the right, which can be referred to the direction of arrow A1 shown in Figures 1 to 5 , and the second direction is the direction of moving to the left, which can be referred to the direction of arrow A2 shown in Figures 1 to 5 . The extending directions of the first diversion pipe 110 and the second diversion pipe 410 are perpendicular to the first direction, which can be referred to the direction of arrow B shown in Figures 1 to 5 .

[0070] In a possible implementation manner, as shown in Figure 1 , a first magnetic member 710, a first cancellation stator yoke 810, and a first cancellation coil 910 can be arranged in the first sub-housing 210. The first magnetic member 710 is arranged in the first cancellation stator yoke 810, and the first cancellation coil 910 is wound around the outer periphery of the first cancellation stator yoke 810.

[0071] A second magnetic member 720, a second cancellation stator yoke 820, and a second cancellation coil 920 are arranged in the second sub-housing 220. The second magnetic member 720 is arranged in the second cancellation stator yoke 820, and the second cancellation coil 920 is wound around the outer periphery of the second cancellation stator yoke 820.

[0072] Among them, the first magnetic member 710 and the second magnetic member 720 in this embodiment can both be permanent magnets. In this way, a stable magnetic field can be provided without an external power source or continuous energy input, making the solenoid valve more reliable during operation and helping to reduce the dependence on the power supply. Additionally, using permanent magnets can simplify the design and structure of the device, contribute to reducing the manufacturing cost, and improve the reliability and durability of the solenoid valve.

[0073] In a possible implementation, referring to Figure 1 as shown, the driving stator yoke 300 may include a first driving stator yoke 310 and a second driving stator yoke 320, and the first driving stator yoke 310 and the second driving stator yoke 320 are connected to opposite ends of the first housing 100 along the first direction.

[0074] The ejector rod assembly 500 may include a first ejector rod 510 and a second ejector rod 520. The first ejector rod 510 passes through the first driving stator yoke 310 and is connected to one end of the driving member 400, and the second ejector rod 520 passes through the second driving stator yoke 320 and is connected to the other end of the driving member 400.

[0075] The driving coil group 600 may include a first driving coil 610 and a second driving coil 620. The first driving coil 610 is wound around the outer periphery of the first driving stator yoke 310, and the second driving coil 620 is wound around the outer periphery of the second driving stator yoke 320.

[0076] In the embodiment of the present application, the first ejector rod 510 is assembled with one end of the driving member 400, and the second ejector rod 520 is assembled with the other end of the driving member 400. Among them, during the assembly process, by adjusting the number of turns of the assembly thread, the distance between the contact surface of the first ejector rod 510 and the first driving stator yoke 310 and the contact surface of the second ejector rod 520 and the second driving stator yoke 320 can be adjusted. In this way, it helps to ensure that there is no air gap between the contact surface of the first ejector rod 510 and the first driving stator yoke 310 and the contact surface of the second ejector rod 520 and the second driving stator yoke 320 when the driving member 400 is in the closed state.

[0077] It should be noted that no air gap means that if there is an air gap, it may cause the first flow guide pipe 110 and the second flow guide pipe 410 to be misaligned, affecting the smooth passage of the fluid medium through the valve. Among them, the corresponding air gap lengths at both ends should be 0.

[0078] In the embodiment of the present application, the winding methods of the first driving coil 610 and the second driving coil 620 are not limited. Exemplarily, the first driving coil 610 and the second driving coil 620 can be tightly wound according to the number of turns requirements, and this embodiment does not limit this.

[0079] The working states of the solenoid valve provided in the embodiments of the present application will be described in detail below. The solenoid valve of the present application mainly includes four states. Among them, according to the working process, it can be divided into the closed valve self-locking state, the closed valve energized state, the open valve self-locking state, and the open valve energized state. The complete working principle of the solenoid valve in this embodiment is as follows:

[0080] Closed valve self-locking: When the solenoid valve is in the closed valve state, both the drive coil group 600 and the cancellation coil group 900 are not energized; the first ejector rod 510 is attracted to the first magnetic member 710, and together with the first cancellation stator yoke 810 and the first sub-housing 210, they form a permanent magnet closed magnetic circuit and generate a first permanent magnet magnetic flux. The first ejector rod 510 is fixedly connected to the drive member 400, and the solenoid valve is in the closed valve self-locking state; among them, the first flow guide pipe 110 and the second flow guide pipe 410 are kept misaligned and closed in the second direction. In this state, the solenoid valve remains stably closed.

[0081] It should be noted that in this embodiment, the first magnetic member 710, the first cancellation stator yoke 810, and the first sub-housing 210 are all composed of high magnetic permeability materials and are used to form the closed magnetic circuit of the solenoid valve.

[0082] It should be noted that in this working state, there is only the permanent magnet closed magnetic circuit jointly generated by the first magnetic member 710, the first cancellation stator yoke 810, and the first sub-housing 210 in the entire system.

[0083] It should be noted that when the first ejector rod 510 is attracted to the first magnetic member 710, there is a distance between the second ejector rod 520 and the second magnetic member 720, which helps to ensure that the drive member 400 can move to the right.

[0084] It can be understood that the closed valve self-locking means that if the solenoid valve can still remain in the closed state when the power supply is lost, it remains safe or prevents fluid leakage in the case of power failure.

[0085] Among them, Figure 2 is the structural schematic diagram of the solenoid valve in the closed valve self-locking state provided by the embodiments of the present application, and the internal magnetic circuit trend is referred to Figure 2 as shown.

[0086] Closed valve energized: When the solenoid valve is in the closed valve state and receives an open valve signal, both the second drive coil 620 and the first cancellation coil 910 are energized, and both the first drive coil 610 and the second cancellation coil 920 are not energized; the first cancellation coil 910 and the first permanent magnet magnetic flux are equal in magnitude and opposite in direction;

[0087] Under the action of the second drive coil 620, the drive member 400 moves in the second direction (horizontally to the right), and the first flow guide pipe 110 and the second flow guide pipe 410 are aligned and connected in the first direction.

[0088] It should be noted that the energization here can be the application of a pulsed current. After both the second drive coil 620 and the first cancellation coil 910 are energized, a drive magnetic flux and a cancellation magnetic flux are generated inside the solenoid valve simultaneously. The cancellation magnetic flux is used to cancel the first permanent magnetic flux, and they have the same magnitude and opposite directions. After the permanent magnetic flux is cancelled, the permanent magnetic suction force acting on the first ejector rod 510 disappears. Under the action of the drive magnetic flux of the second drive coil 620, the driving member 400 is subjected to an electromagnetic suction force horizontally to the right, and the driving member 400 moves to the right.

[0089] It can be understood that the valve-closed energization is the process state of the solenoid valve.

[0090] Among them, Figure 3 is a schematic structural diagram of the solenoid valve provided in the embodiment of the present application in the valve-closed energization state, and the internal magnetic flux trend is referred to Figure 3 as shown.

[0091] Valve-opening self-locking: On the basis of the previous state, the second drive coil 620 continues to be energized, and the driving member 400 continues to move in the second direction (horizontally to the right). The smaller the air gap between the driving member 400 and the second drive stator yoke 320, until they are completely attracted.

[0092] During the assembly process, the relative distance between the first ejector rod 510 and the first magnetic member 710 is adjusted to be equal to the distance between the driving member 400 and the first drive stator yoke 310. Therefore, when the driving member 400 is completely attracted to the second drive stator yoke 320, the second ejector rod 520 contacts and is attracted to the second magnetic member 720, and together with the second cancellation stator yoke 820 and the second sub-housing 220, they form a permanent magnetic closed magnetic circuit and generate a second permanent magnetic flux. The second ejector rod 520 is fixedly connected to the driving member 400, and the solenoid valve is in the valve-opening self-locking state.

[0093] In this state, the first guide pipe 110 and the second guide pipe 410 are aligned and conducting in the first direction, and the solenoid valve remains stably open.

[0094] It should be noted that in this embodiment, the second magnetic member 720, the second cancellation stator yoke 820, and the second sub-housing 220 are all composed of high-permeability materials and are used to form the closed magnetic circuit of the solenoid valve.

[0095] Among them, Figure 4 is a schematic structural diagram of the solenoid valve provided in the embodiment of the present application in the valve-opening self-locking state, and the internal magnetic circuit trend is referred to Figure 4 as shown.

[0096] Valve opening and energization: When the solenoid valve is in the valve-opening state and receives a valve-closing signal, both the first drive coil 610 and the second cancellation coil 920 are energized, while both the second drive coil 620 and the first cancellation coil 910 are not energized. The magnitudes of the second cancellation coil 920 and the second permanent magnetic flux are equal and their directions are opposite. Among them, the cancellation magnetic flux generated by the second cancellation coil 920 cancels the permanent magnetic flux generated by the second magnetic member 720, and the holding suction force between the second ejector rod 520 and the second magnetic member 720 disappears. Under the action of the drive magnetic flux of the second drive coil 620, the drive member 400 is subjected to an electromagnetic suction force to the left, and the solenoid valve has a tendency to close.

[0097] Among them, under the action of the first drive coil 610, the drive member 400 continuously moves in the first direction. When the drive member 400 is attracted to the left, the first flow guide pipe 110 and the second flow guide pipe 410 are misaligned in the first direction, and return to the valve-closing self-locking state under the action of the first magnetic member 710.

[0098] Among them, Figure 5 is a schematic structural diagram of the solenoid valve in the valve-opening and energized state provided by the embodiment of the present application, and the internal magnetic circuit trend is referred to Figure 5 as shown.

[0099] It can be understood that valve opening and energization is the process state of the solenoid valve.

[0100] It can be understood that during the state conversion, the cancellation coil connected in series with the drive coil is energized simultaneously, generating a cancellation magnetic flux with the opposite direction and equal magnitude to the permanent magnetic flux, canceling the holding suction force of the permanent magnet, and the moving iron core completes the rapid switching between the two stable states under the combined action of the drive coil and the cancellation coil.

[0101] The above is the complete working principle of the solenoid valve provided by the embodiment of the present application. Among them, the solenoid valve provided by this embodiment has the following technical effects:

[0102] First, the solenoid valve provided by the present application has the advantage of fast response speed. Among them, the fast response can be reflected in the use of the drive coil group 600 to be energized to generate a strong suction force, and at the same time, the cancellation coil is energized to cancel the magnetic force of the permanent magnet, releasing the moving iron core and driving the valve to open or close quickly.

[0103] Second, the solenoid valve provided by the present application has the advantage of bistability. Among them, the bistability can be reflected in the use of the suction force of the permanent magnet to maintain the two states of stable opening and stable closing of the valve.

[0104] Third, the solenoid valve provided by the present application has the advantage of low power consumption. Among them, the low power consumption is reflected in the use of the permanent magnet to replace the conventional reaction spring, without continuously energizing to maintain the open state of the valve, and only consuming power at the moment of steady-state transformation.

[0105] Fourth, this application combines the advantages of axial flow and self-locking solenoid valves. A first diversion pipe 110 is provided on the first cover body 100, and a second diversion pipe 410 is arranged inside the driving member 400. By controlling the left and right suction of the driving member 400, the opening and closing moments and the length of the opening and closing time of the valve can be adjusted, so as to realize the functions of quickly and accurately controlling the quantity and law of fluid media.

[0106] It can be understood that the opening and closing moments can be adjusted according to actual situations, and the length of the opening and closing time can be controlled by adjusting the energization time of the solenoid valve coil, thereby controlling the opening and closing speed and time of the valve. Alternatively, a timer circuit can also be used to control the energization and de-energization time of the solenoid valve, so as to adjust the opening and closing time of the valve. This embodiment does not make any limitations in this regard.

[0107] Fifth, this application uses double driving coils to independently control the opening and closing of the valve body, replacing the reaction spring used in conventional solenoid valves. It has the advantages of simple structure, convenient assembly, no need for maintenance, and the same fast speed of opening and closing the valve, and can meet the requirements of accurately controlling the inlet and outlet, flow rate, pressure and direction of liquid or gas.

[0108] Sixth, this application uses two permanent magnets to replace the conventional reaction spring to maintain the two states of opening and closing of the valve, solving the problems that the conventional solenoid valve needs to overcome the spring reaction force during the suction process, resulting in the inability to balance the holding force and the suction force, etc. Moreover, the valve does not need to be continuously energized when maintaining the open state, and has the advantages of fast steady-state switching speed, no heat generation, low power consumption and energy saving.

[0109] Seventh, this application uses double driving coils in cooperation with double cancellation coils and double permanent magnets to achieve fast and accurate response and stable holding of the valve. The overall structure is symmetrically arranged, and the opening and closing of the valve are independently controlled, having the advantages of large steady-state position holding force, strong anti-interference ability, no coupling in state conversion, and simple control logic.

[0110] Eighth: This application symmetrically arranges the first cancellation coil 910 and the second cancellation coil 920, and arranges the first driving coil 610 and the second driving coil 620 accordingly. In this way, the overall structure is simple to assemble, the opening and closing valve actions are independent of each other, and there is no coupling in state conversion.

[0111] Ninth, the driving coil is paired with the corresponding cancellation coil to complete the accurate and fast opening and closing valve actions, and the permanent magnet is used to maintain the stable state, and cooperate with the cancellation coil to achieve the fast conversion of the state.

[0112] It should be noted that there is no limitation on the connection method of the driving coil and the corresponding cancellation coil. Exemplarily, the driving coil and the corresponding cancellation coil can be connected in series. In this way, while meeting the requirements of fast and accurate control, the control logic can also be simplified.

[0113] It should be noted that whether the solenoid valve is opened or closed, the magnetic member 700 provides the attracting and holding force. If the attracting force is small or significantly less than the theoretical value, it is necessary to check whether there is a large gap between the permanent magnet and the ejector rod assembly 500.

[0114] In a possible implementation, as shown in Figure 1 it may further include a winding bracket 120. The winding bracket 120 is connected to the first housing 100. Specifically, during assembly, after the driving coil group 600 is assembled on the winding bracket 120, it is wound around the outer periphery of the driving stator yoke 300.

[0115] In this embodiment, the structure of the winding bracket 120 is not limited. Exemplarily, the winding bracket 120 in this embodiment may be a winding keel.

[0116] In this way, the design of the winding keel provides a structural support, enabling the driving coil group 600 to be evenly wound around the outer periphery of the driving stator yoke 300, which helps to maintain the shape and position of the driving coil group 600 and prevent displacement or deformation during operation.

[0117] Exemplarily, the winding keel is usually designed to have good heat dissipation performance, which helps to effectively dissipate heat when current passes through the coil and prevent the coil from overheating.

[0118] In a possible implementation, along the first direction or the second direction, one of the winding bracket 120 and the driving member 400 may be provided with a guiding slide, and the other of the winding bracket 120 and the driving member 400 may be provided with a guiding chute; when the driving member 400 moves along the first direction or the second direction, the guiding slide slides in the guiding chute.

[0119] In this embodiment, as shown in Figure 2 it is mainly described by taking the guiding slide 420 provided on the driving member 400 and the guiding chute 121 provided on the winding bracket 120 as an example. In this way, the cooperation between the guiding slide 420 and the guiding chute 121 for sliding helps to guide the sliding of the driving member 400 to a certain extent, thereby avoiding problems such as deviation of the moving path of the driving member 400 and maximizing the control accuracy of the solenoid valve.

[0120] In this embodiment, one of the driving stator yoke 300 and the winding bracket 120 may be provided with a positioning step, and the other of the driving stator yoke 300 and the winding bracket 120 may be provided with a positioning groove, and the positioning step is located in the positioning groove. In this embodiment, the positions, numbers, dimensions, shapes, etc. of the positioning step and the positioning groove are not limited.

[0121] In this way, under the combined action of the positioning step and the positioning groove, it helps to prevent the winding keel from rotating in the circumferential direction, thereby ensuring the assembly stability of the driving coil group 600 and the winding keel.

[0122] In a possible implementation manner, as shown in Figure 2 , an assembly groove 830 may be formed in the counteracting stator yoke 800, and the magnetic member 700 is installed in the assembly groove 830. In this way, on the one hand, it can play a certain role in installing and fixing the magnetic member 700 to accurately position the magnetic member 700 and achieve a stable magnetic field effect; on the other hand, the design of the assembly groove 830 can help reduce the leakage of magnetic flux, ensure that more magnetic flux is concentrated in the required area, and improve the efficiency.

[0123] In the embodiment of the present application, as shown in Figure 1 , the solenoid valve may further include a buffer member 1000, and the buffer member 1000 is installed in the assembly groove 830 and surrounds the outer periphery of the magnetic member 700. In this way, when the moving iron core is completely attracted to the driving stator yoke 300, the ejector rod assembly 500 contacts and is attracted to the permanent magnet through the buffer member 1000.

[0124] In this way, the design of the buffer member 1000 can improve the attraction effect between the ejector rod assembly 500 and the permanent magnet, and help improve the sealing effect between the ejector rod assembly 500 and the permanent magnet, reducing the magnetic leakage phenomenon. Exemplarily, the buffer member 1000 in this embodiment may be a buffer gasket.

[0125] The solenoid valve provided by the embodiment of the present application, on the one hand, a first diversion pipe is provided on the first housing, and a second diversion pipe is provided in the driving member, and it can control the opening and closing time and the length of the opening and closing time of the valve by controlling the left and right attraction of the driving member, so as to realize the function of quickly and accurately controlling the quantity and law of the fluid medium; on the other hand, the present application uses two driving coils to independently control the opening and closing of the valve body. Compared with the conventional solenoid valve using a return spring, it has the advantages of simple structure, convenient assembly, no need for maintenance, and the same fast speed of opening and closing the valve, and can meet the requirements of accurately controlling the inlet and outlet, flow rate, pressure and direction of liquid or gas; on the other hand, the present application uses two magnetic members to replace the conventional return spring to maintain the opening and closing states of the valve, solving the problems that the conventional solenoid valve needs to overcome the spring reaction force during the attraction process, resulting in the inability to balance the holding force and the attraction force, and the valve does not need to be continuously powered on when maintaining the open state, having the advantages of fast steady-state switching speed, no heat generation, low power consumption and energy saving; on the other hand, the present application uses two driving coils in cooperation with two counteracting coils and two permanent magnets to achieve fast and accurate response and stable holding of the valve. The overall structure is symmetrically arranged, the opening and closing of the valve are independently controlled, and it has the advantages of large steady-state position holding force, strong anti-interference ability, no coupling in state conversion, and simple control logic.

[0126] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0127] In the description of the present application, it should be understood that the terms "comprising" and "having" used herein and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0128] Unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the connection inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A solenoid valve, characterized in that: It comprises a first cover body and at least one second cover body, wherein the second cover body is connected to the side of the first cover body, and the first cover body is provided with a first flow guide pipe; The first cover body is provided with a driving stator yoke, a driving member, a push rod assembly and a driving coil group, the driving stator yoke is connected to the first cover body, the push rod assembly passes through the driving stator yoke and is connected to the driving member, the driving coil group is wound around the outer circumference of the driving stator yoke, and a second flow guide tube is opened in the driving member, and the extension direction of the second flow guide tube is parallel to the extension direction of the first flow guide tube; The second cover body is provided with a magnetic member, a counteracting stator yoke and a counteracting coil group, the counteracting stator yoke is connected to the second cover body, the magnetic member is provided at one end of the counteracting stator yoke facing the push rod assembly, and the counteracting coil group is wound around the outer circumference of the counteracting stator yoke; When the solenoid valve receives a valve opening signal, part of the drive coil group and part of the offset coil group are energized, the drive member moves along a first direction, and the first flow guide tube and the second flow guide tube are aligned and connected in the first direction; When the solenoid valve receives a valve closing signal, part of the drive coil group and part of the offset coil group are energized, the drive member moves along the second direction, and the first flow guide tube and the second flow guide tube are staggered and closed in the second direction; The first direction and the second direction are two opposite directions and intersect with the extending directions of the first flow guiding tube and the second flow guiding tube.

2. The solenoid valve according to claim 1, characterized in that: The second cover body includes a first sub-cover body and a second sub-cover body, wherein the first sub-cover body and the second sub-cover body are connected to two opposite sides of the first cover body along the first direction; The first sub-cover is provided with a first magnetic member, a first offset stator yoke and a first offset coil, wherein the first magnetic member is provided in the first offset stator yoke, and the first offset coil is wound around the outer periphery of the first offset stator yoke; The second sub-cover is provided with a second magnetic member, a second offset stator yoke and a second offset coil. The second magnetic member is provided in the second offset stator yoke, and the second offset coil is wound around the outer circumference of the second offset stator yoke.

3. The solenoid valve according to claim 2, characterized in that: The driving stator yoke comprises a first driving stator yoke and a second driving stator yoke, wherein the first driving stator yoke and the second driving stator yoke are connected to opposite ends of the first cover along a first direction; The push rod assembly includes a first push rod and a second push rod, the first push rod passes through the first driving stator yoke and is connected to one end of the driving member, and the second push rod passes through the second driving stator yoke and is connected to the other end of the driving member; The driving coil group includes a first driving coil and a second driving coil. The first driving coil is wound around the outer circumference of the first driving stator yoke, and the second driving coil is wound around the outer circumference of the second driving stator yoke.

4. The solenoid valve according to claim 3, characterized in that: When the solenoid valve is in a closed valve state, the driving coil group and the offset coil group are not energized; The first push rod is attracted to the first magnetic member, and together with the first offset stator yoke and the first sub-cover, forms a permanent magnetic closed magnetic circuit, and generates a first permanent magnetic flux. The first push rod is fixedly connected to the driving member, and the solenoid valve is in a closed valve self-locking state. The first flow guide tube and the second flow guide tube are kept staggered and closed in the second direction.

5. The solenoid valve according to claim 4, characterized in that: When the solenoid valve is in a closed state and receives a valve opening signal, the second drive coil and the first offset coil are both energized, and the first drive coil and the second offset coil are both not energized; the first offset coil and the first permanent magnet magnetic flux are equal in magnitude and opposite in direction; Under the action of the second driving coil, the driving member moves along the second direction, and the first flow guide tube and the second flow guide tube are aligned and connected in the first direction.

6. The solenoid valve according to claim 5, characterized in that: When the solenoid valve is in the valve-opening state, the second driving coil is continuously energized, the driving member is continuously moved in the second direction, the driving member is attracted to the second driving stator yoke, the second push rod is attracted to the second magnetic member, and together with the second offset stator yoke and the second sub-cover, a permanent magnetic closed magnetic circuit is formed, and a second permanent magnetic flux is generated; the second push rod is fixedly connected to the driving member, and the solenoid valve is in the valve-opening self-locking state; The first flow guide tube and the second flow guide tube are aligned and connected in the first direction.

7. The solenoid valve according to claim 6, characterized in that: When the solenoid valve is in an open state and receives a valve closing signal, the first drive coil and the second cancelling coil are both energized, the second drive coil and the first cancelling coil are both not energized, and the second cancelling coil and the second permanent magnet magnetic flux are equal in magnitude and opposite in direction; Under the action of the first driving coil, the driving member moves along a first direction, and the first flow guiding tube and the second flow guiding tube are misaligned in the first direction.

8. The solenoid valve according to any one of claims 1 to 7, characterized in that: It also includes a winding bracket, which is connected to the first cover body, and the driving coil group is wound around the outer periphery of the driving stator yoke through the winding bracket.

9. The solenoid valve according to claim 8, characterized in that: Along the first direction or the second direction, one of the winding bracket and the driving member is provided with a guide slide, and the other of the winding bracket and the driving member is provided with a guide slide groove; when the driving member moves along the first direction or the second direction, the guide slide slides in the guide slide groove; And / or, one of the driving stator yoke and the winding bracket is provided with a positioning step, and one of the driving stator yoke and the winding bracket is provided with a positioning groove, and the positioning step is located in the positioning groove.

10. The solenoid valve according to any one of claims 1 to 7, characterized in that: The offset stator yoke is provided with an assembly groove, and the magnetic member is installed in the assembly groove; The solenoid valve further comprises a buffer component, which is installed in the assembly groove and surrounds the outer circumference of the magnetic component.

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