solenoid valve

Abstract

The application provides an electromagnetic valve, and relates to the technical field of electromagnetic valves, and aims to solve the problems of low control precision and poor reliability of electromagnetic valves in the prior art. The electromagnetic valve comprises a first cover body and at least one second cover body. The first cover body is provided with a driving stator yoke, a driving member, a top rod assembly and a driving coil set. The second cover body is provided with a magnetic member, a counteracting stator yoke and a counteracting coil set. The counteracting stator yoke is connected to the second cover body. When the electromagnetic valve receives an opening valve signal, part of the driving coil set and part of the counteracting coil set are electrified, the driving member moves in a first direction, and 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 closing valve signal, part of the driving coil set and part of the counteracting coil set are electrified, and the first flow guide pipe and the second flow guide pipe are misaligned in a second direction. The application helps to improve the control precision of the electromagnetic valve and improve the reliability of the electromagnetic valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve. BACKGROUND

[0002] The electromagnetic valve is an industrial equipment controlled by electromagnetism, which is an electromagnetic actuator converting electromagnetic energy into mechanical energy. The coil is controlled by simple logic pulse command to realize fast and stable opening and closing action by electromagnetic attraction, which has the characteristics of fast response, low power consumption, double-stable switch, simple assembly, etc. It is usually used in industrial automation system for precise and fast control of fluid medium flow, control of liquid or gas inflow, flow, pressure and direction, etc.

[0003] In the related art, the electromagnetic valve generally adopts a direct-acting electromagnetic valve, an axial-flow electromagnetic valve or a self-locking electromagnetic valve. However, the control accuracy of the above-mentioned electromagnetic valve is low, and the reliability of the electromagnetic valve is poor. SUMMARY

[0004] The embodiments of the present application provide an electromagnetic valve, which helps to improve the control accuracy of the electromagnetic valve and improve the reliability of the electromagnetic valve.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application provide an electromagnetic valve, which comprises a first cover body and at least one second cover body, the second cover body is connected to the side of the first cover body, and a first flow guide pipe is formed on the first cover body;

[0006] A driving stator yoke, a driving member, a top rod assembly and a driving coil group are arranged in the first cover body, the driving stator yoke is connected to the first cover body, the top rod assembly penetrates the driving stator yoke and is connected to the driving member, the driving coil group is arranged around the outer periphery of the driving stator yoke, a second flow guide pipe is formed on the driving member, and the extension direction of the second flow guide pipe is parallel to the extension direction of the first flow guide pipe;

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

[0008] When the electromagnetic valve receives an opening valve signal, part of the driving coil group and part of the counteracting coil group are energized, the driving member moves in a first direction, and the first flow guide pipe and the second flow guide pipe are aligned and communicated in the first direction;

[0009] When the electromagnetic valve receives a closing valve signal, part of the driving coil group and part of the counteracting coil group are energized, the driving member moves in a second direction, and the first flow guide pipe and the second flow guide pipe are misaligned in the second direction.

[0010] The first direction and the second direction are two opposite directions intersecting with the extending directions of the first flow guide pipe and the second flow guide pipe.

[0011] In a possible implementation, 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 in the first direction.

[0012] The first sub-cover body is provided with a first magnetic member, a first cancellation stator yoke, and a first cancellation coil, the first magnetic member is arranged in the first cancellation stator yoke, and the first cancellation coil is arranged around the outer periphery of the first cancellation stator yoke.

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

[0014] In a possible implementation, 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 in the first direction.

[0015] The top rod assembly includes a first top rod and a second top rod, the first top rod is arranged through the first driving stator yoke and connected to one end of the driving member, and the second top rod is arranged through the second driving stator yoke and 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 arranged around the outer periphery of the first driving stator yoke, and the second driving coil is arranged around the outer periphery of the second driving stator yoke.

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

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

[0019] The first flow guide pipe and the second flow guide pipe are misaligned in the second direction.

[0020] In a possible implementation, when the electromagnetic valve is in the closed valve state and receives an open valve signal, the second drive coil and the first cancellation coil are energized, and the first drive coil and the second cancellation coil are not energized; the first cancellation coil and the first permanent magnetic flux are equal in size and opposite in direction.

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

[0022] In a possible implementation, when the electromagnetic valve is in the open valve state, the second drive coil is continuously energized, the driving member continuously moves in the first direction, the driving member is attracted to the second drive stator yoke, the second top rod is attracted to the second magnetic member, and the second top rod, the driving member, the second cancellation stator yoke, and the second sub-housing together form a permanent closed magnetic circuit and generate a second permanent magnetic flux; the second top rod is fixedly connected to the driving member, and the electromagnetic valve is in the open valve self-locking state.

[0023] The first flow guide pipe and the second flow guide pipe remain aligned and communicated in the first direction.

[0024] In a possible implementation, when the electromagnetic valve is in the open valve state and receives a closed valve signal, the first drive coil and the second cancellation coil are energized, the second drive coil and the first cancellation coil are not energized, and the second cancellation coil and the second permanent magnetic flux are equal in size and opposite in direction.

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

[0026] In a possible implementation, a winding support is further included, the winding support 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 support.

[0027] In a possible implementation, one of the winding support and the driving member is provided with a guide sliding table, and the other of the winding support and the driving member is provided with a guide sliding groove in the first direction or the second direction.

[0028] When the driving member moves in the first direction or the second direction, the guide sliding table slides in the guide sliding groove.

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

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

[0031] The electromagnetic valve provided by the embodiment of the present application can adjust the opening and closing time and the length of the opening and closing time of the valve by controlling the left and right suction of the driving member, so as to realize the quick and accurate control function of the quantity and regularity of the fluid medium. On the other hand, compared with the counterforce spring used in the conventional electromagnetic valve, the electromagnetic valve provided by the embodiment of the present application has the advantages of simple structure, convenient assembly, no maintenance, same quick switching speed, and the like, and can meet the requirements of accurate control of the in-out, flow, pressure and direction of the liquid or gas. On the other hand, the two magnetic members are used to replace the conventional counterforce spring to keep the valve in the open and closed states, so as to solve the problems that the conventional electromagnetic valve needs to overcome the spring counterforce in the suction process, and the holding force and the suction force cannot be considered, and the like. In addition, the valve does not need to be continuously powered in the open state, has the advantages of fast steady-state switching speed, no heating, low power consumption and energy saving, and the like. On the other hand, the electromagnetic valve provided by the embodiment of the present application uses the double driving coils to cooperate with the double counteracting coils and the double permanent magnets to realize the quick and accurate response and stable holding of the valve, the overall structure is symmetrically arranged, the opening and closing valves are independently controlled, has the advantages of large steady-state position holding force, strong anti-interference ability, state conversion without coupling, simple control logic, and the like.

[0032] The structure of the present application and other application purposes and beneficial effects thereof will be more obvious and understandable through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The structure diagram of the electromagnetic valve provided by the embodiment of the present application;

[0035] Figure 2 The structure diagram of the electromagnetic valve provided by the embodiment of the present application in the closed valve self-locking state;

[0036] Figure 3 The structure diagram of the electromagnetic valve provided by the embodiment of the present application in the closed valve power-on state;

[0037] Figure 4 The structure diagram of the electromagnetic valve provided by the embodiment of the present application in the open valve self-locking state;

[0038] Figure 5 The electromagnetic valve provided by the embodiment of the present application is in the structure schematic diagram of open valve energization.

[0039] Explanation of reference signs:

[0040] 100 - first cover body; 110 - first flow guide pipe; 120 - winding support; 121 - guide sliding groove;

[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 flow guide pipe; 420 - guide sliding table;

[0044] 500 - top rod assembly; 510 - first top rod; 520 - second top rod;

[0045] 600 - driving coil group; 610 - first driving coil; 620 - second driving coil;

[0046] 700 - magnetic member; 710 - first magnetic member; 720 - second magnetic member;

[0047] 800 - counteracting stator yoke; 810 - first counteracting stator yoke; 820 - second counteracting stator yoke; 830 - assembly groove;

[0048] 900 - counteracting coil group; 910 - first counteracting coil; 920 - second counteracting coil;

[0049] 1000 - buffer member. DETAILED DESCRIPTION

[0050] The current direct-acting electromagnetic valve and axial-flow electromagnetic valve need to be continuously energized in the use process, which increases the energy consumption of the electromagnetic valve, causes the coil to heat seriously, increases the coil resistance value, reduces the current, reduces the corresponding ampere-turns, reduces the electromagnetic attraction, reduces the reliability and service life of the electromagnetic valve, and reduces the control precision of the electromagnetic valve. The self-locking electromagnetic valve needs to overcome the elastic force of the spring when maintaining at two steady states and converting between the two steady states in the use process, and thus has the disadvantages of small output force, slow valve closing response, and the need to input large reverse coil current during steady state conversion.

[0051] Based on the above technical problems, the electromagnetic valve provided by the embodiment of the present application has the following advantages: on the one hand, a first flow guide pipe is formed on the first cover body, and a second flow guide pipe is formed in the driving member, so that the opening and closing time of the valve can be adjusted by controlling the left and right suction of the driving member, thereby realizing the quick and accurate control of the quantity and regularity of the fluid medium; on the other hand, the opening and closing of the valve body are independently controlled by the two driving coils, compared with the counterforce spring used in the conventional electromagnetic valve, the electromagnetic valve has the advantages of simple structure, convenient assembly, no maintenance, same quick opening and closing speed, and can meet the requirements of accurate control of the in-out, flow, pressure and direction of the liquid or gas; on the other hand, the two magnetic members are used to replace the conventional counterforce spring to keep the valve in the open and closed states, which solves the problem that the conventional electromagnetic valve needs to overcome the spring counterforce during the suction process, so that the holding force and the suction force cannot be considered, and the valve does not need to be continuously powered when keeping the open state, has the advantages of fast switching speed in the steady state, no heating, low power consumption and energy saving; on the other hand, the two driving coils are used to realize the quick and accurate response and stable holding of the valve together with the double cancellation coils and the double permanent magnets, the overall structure is symmetrically arranged, the opening and closing of the valve are independently controlled, has the advantages of large steady-state position holding force, strong anti-interference ability, state conversion without coupling, simple control logic and the like.

[0052] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] Referring to Figure 1 The embodiment of the present application provides an electromagnetic valve, which comprises 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] Wherein, the connection mode of the second cover body 200 and the first cover body 100 is not limited. For example, the second cover body 200 and the first cover body 100 can be welded, bonded or clamped. The present embodiment does not limit this.

[0055] Wherein, the number of the second cover body 200 is not limited, and in the present embodiment, two second cover bodies 200 are mainly taken as an example for description. Specifically, referring to Figure 1 The second cover body 200 can comprise 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 the opposite sides of the first cover body 100 along the first direction.

[0056] The first sub-cover 210 and the second sub-cover 220 can be symmetrically arranged, which makes the overall assembly simpler, the opening and closing valve actions independent of each other, the state conversion uncoupled, and has the advantages of large steady-state position holding force, strong anti-interference ability and the like.

[0057] In the embodiment of the present application, referring to Figure 1 The first cover 100 is provided with a first flow guide pipe 110, and the first cover 100 is provided with a driving stator yoke 300, a driving member 400, a top rod assembly 500 and a driving coil group 600. The driving stator yoke 300 is connected to the first cover 100. The top rod assembly 500 penetrates the driving stator yoke 300 and is connected to the driving member 400. The driving coil group 600 is arranged around the outer periphery of the driving stator yoke 300. The driving member 400 is provided with a second flow guide pipe 410. The extension direction of the second flow guide pipe 410 is parallel to the extension direction of the first flow guide pipe 110.

[0058] The first flow guide pipe 110 can be formed by a groove in the first cover 100, or a pipe can be separately installed in the first cover 100. The same applies to the second flow guide pipe 410.

[0059] The type of the driving member 400 is not limited. In the embodiment, the driving member 400 can be a moving iron core.

[0060] In the embodiment of the present application, referring to Figure 1 The second cover 200 can be provided with a magnetic member 700, a counteracting stator yoke 800 and a counteracting coil group 900. The counteracting stator yoke 800 is connected to the second cover 200. The magnetic member 700 is arranged at one end of the counteracting stator yoke 800 facing the top rod assembly 500. The counteracting coil group 900 is arranged around the outer periphery of the counteracting stator yoke 800.

[0061] The type of the magnetic member 700 is not limited. In the embodiment, the magnetic member 700 can be a permanent magnet.

[0062] The counteracting coil group 900 is arranged around the outer periphery of the counteracting stator yoke 800, which can effectively reduce the magnetic leakage phenomenon. By generating a counteracting magnetic field opposite to the driving magnetic field, the counteracting coil group 900 can limit the diffusion of magnetic flux, thereby improving the efficiency of the magnetic circuit.

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

[0064] When the electromagnetic valve receives an opening signal, the partial driving coil group 600 and the partial counter coil group 900 are both energized, the driving member 400 moves in a first direction (horizontally to the right), and the first flow guide pipe 110 and the second flow guide pipe 410 are aligned and communicated in the first direction.

[0065] The state in which the first flow guide pipe 110 and the second flow guide pipe 410 are aligned and communicated in the first direction can be referred to as shown in Figs. 1 and 2. Figure 4 Figure 5

[0066] When the electromagnetic valve receives a closing signal, the partial driving coil group 600 and the partial counter coil group 900 are both energized, the driving member 400 moves in a second direction (horizontally to the left), and the first flow guide pipe 110 and the second flow guide pipe 410 are misaligned in the second direction.

[0067] The state in which the first flow guide pipe 110 and the second flow guide pipe 410 are misaligned in the second direction can be referred to as shown in Figs. 3 and 4. Figure 2 Figure 3

[0068] The first direction and the second direction are two directions away from each other and cross the extension direction of the first flow guide pipe 110 and the second flow guide pipe 410.

[0069] It should be noted that in the embodiment, the first direction is a direction of moving to the right, which can be referred to as shown by the arrow A1 direction in Fig. 1, and the second direction is a direction of moving to the left, which can be referred to as shown by the arrow A2 direction in Fig. 3. The extension direction of the first flow guide pipe 110 and the second flow guide pipe 410 is perpendicular to the first direction, which can be referred to as shown by the arrow B direction in Fig. 5. Figures 1 to 5 Figures 1 to 5 Figures 1 to 5

[0070] In a possible implementation, referring to Fig. 5, the first sub-housing 210 can be provided with a first magnetic member 710, a first counter stator yoke 810, and a first counter coil 910. The first magnetic member 710 is arranged in the first counter stator yoke 810, and the first counter coil 910 is arranged around the outer periphery of the first counter stator yoke 810. Figure 1 The second sub-housing 220 is provided with a second magnetic member 720, a second counter stator yoke 820, and a second counter coil 920. The second magnetic member 720 is arranged in the second counter stator yoke 820, and the second counter coil 920 is arranged around the outer periphery of the second counter stator yoke 820.

[0071]

[0072] ​​​​​​​​In the embodiment, the first magnetic member 710 and the second magnetic member 720 can be permanent magnets. In this way, a stable magnetic field can be provided, and an external power supply or continuous energy input is not required, so that the electromagnetic valve is more reliable in operation, and the dependence on the power supply is reduced. In addition, the use of permanent magnets can simplify the design and structure of the device, and help to reduce manufacturing costs and improve the reliability and durability of the electromagnetic valve.

[0073] In one possible implementation, referring to Figure 1 The driving stator yoke 300 can include a first driving stator yoke 310 and a second driving stator yoke 320, which are connected to opposite ends of the first cover 100 in the first direction.

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

[0075] The driving coil assembly 600 can include a first driving coil 610 and a second driving coil 620. The first driving coil 610 is arranged around the outer periphery of the first driving stator yoke 310. The second driving coil 620 is arranged around the outer periphery of the second driving stator yoke 320.

[0076] In the embodiment, 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. During assembly, the number of assembled threads can be adjusted to adjust 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. In this way, it is helpful 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 in the closed state of the driving member 400.

[0077] It should be noted that the absence of air gap means that if there is an air gap, the first flow guide pipe 110 and the second flow guide pipe 410 can not be aligned, which affects the smooth passage of the fluid medium through the valve. The length of the air gap between the two ends should be 0.

[0078] In the embodiment, the winding method of the first driving coil 610 and the second driving coil 620 is not limited. For example, the first driving coil 610 and the second driving coil 620 can be tightly wound according to the number of turns, and the embodiment does not limit this.

[0079] The working states of the electromagnetic valve provided in the embodiments of the present application are described in detail below. The electromagnetic valve of the present application mainly includes four states, which can be divided into closed valve self-locking, closed valve energization, open valve self-locking and open valve energization according to the working process. The complete working principle of the electromagnetic valve in the embodiments is as follows:

[0080] Closed valve self-locking: when the electromagnetic valve is in the closed valve state, neither the driving coil group 600 nor the counter coil group 900 is energized; the first top rod 510 is attracted to the first magnetic member 710 and, together with the first counter stator yoke 810 and the first sub-housing 210, forms a permanent magnet closed magnetic circuit and generates a first permanent magnet magnetic flux. The first top rod 510 is fixedly connected to the driving member 400, and the electromagnetic valve is in the closed valve self-locking state; wherein 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 electromagnetic valve remains stably closed.

[0081] It should be noted that in the embodiments, the first magnetic member 710, the first counter stator yoke 810 and the first sub-housing 210 are all composed of high magnetic permeability material, which is used to form the closed magnetic circuit of the electromagnetic valve.

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

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

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

[0085] Wherein, Figure 2 The structure diagram of the electromagnetic valve provided in the embodiments of the present application in the closed valve self-locking state is shown in FIG. 5, and the internal magnetic circuit trend is shown in FIG. 6. Figure 2

[0086] Closed valve energization: when the electromagnetic valve is in the closed valve state and receives an open valve signal, the second driving coil 620 and the first counter coil 910 are both energized, and the first driving coil 610 and the second counter coil 920 are both not energized; the first counter coil 910 and the first permanent magnet magnetic flux are equal in size and opposite in direction.

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

[0088] ​It should be noted that the power supply here can be the pulse current, wherein the second drive coil 620 and the first cancellation coil 910 are powered, and the drive magnetic flux and the cancellation magnetic flux are generated in the electromagnetic valve at the same time, the cancellation magnetic flux is used to cancel the first permanent magnetic flux, and the two have the same size and opposite directions. After the permanent magnetic flux is cancelled, the permanent magnetic attraction acting on the first top rod 510 disappears, and the driving member 400 is subjected to the electromagnetic attraction in the horizontal right direction under the action of the drive magnetic flux of the second drive coil 620, and the driving member 400 moves to the right.

[0089] It can be understood that the power supply in the closed valve state is the process state of the electromagnetic valve.

[0090] Wherein, Figure 3 The structure schematic diagram of the electromagnetic valve in the closed valve power supply state provided by the embodiment of the application is shown in Figure 3 .

[0091] The valve opening self-locking: on the basis of the previous state, the second drive coil 620 is continuously powered, the driving member 400 continuously moves in the first direction (horizontally to the right), the air gap between the driving member 400 and the second drive stator yoke 320 is smaller and smaller until complete attraction.

[0092] In the assembly process, the relative distance between the first top 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, so that when the driving member 400 is completely attracted to the second drive stator yoke 320, the second top rod 520 is in contact with and attracted to the second magnetic member 720, and together with the second cancellation stator yoke 820 and the second sub-shield body 220, the second top rod 520 forms a permanent closed magnetic circuit and generates a second permanent magnetic flux. The second top rod 520 is fixedly connected with the driving member 400, and the electromagnetic valve is in the valve opening self-locking state.

[0093] In this state, the first flow guide pipe 110 and the second flow guide pipe 410 are aligned and conductive in the first direction, and the electromagnetic valve remains stable and open.

[0094] It should be noted that in the embodiment, the second magnetic member 720, the second cancellation stator yoke 820 and the second sub-shield body 220 are composed of high magnetic permeability material, which is used to form a closed magnetic circuit of the electromagnetic valve.

[0095] Wherein, Figure 4 The structure schematic diagram of the electromagnetic valve in the valve opening self-locking state provided by the embodiment of the application is shown in Figure 4 .

[0096] Open valve energization: when the electromagnetic valve is in the open valve state and receives the closing signal, the first drive coil 610 and the second cancellation coil 920 are both energized, the second drive coil 620 and the first cancellation coil 910 are both not energized, and the second cancellation coil 920 and the second permanent magnetic flux are equal in size and opposite in direction. Among them, the second cancellation coil 920 generates a cancellation magnetic flux to cancel the permanent magnetic flux generated by the second magnetic member 720, and the holding attraction force between the second top rod 520 and the second magnetic member 720 disappears. Under the action of the driving magnetic flux of the second drive coil 620, the driving member 400 is subjected to an electromagnetic attraction force horizontally to the left, and the electromagnetic valve has a tendency to close.

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

[0098] Among them, Figure 5 The structure diagram of the electromagnetic valve in the open valve energization state provided by the embodiment of the present application is shown in FIG. 6. Figure 5

[0099] It can be understood that the open valve energization is a process state of the electromagnetic valve.

[0100] It can be understood that when the state is transformed, the cancellation coil corresponding to the drive coil is energized at the same time, generates a cancellation magnetic flux opposite in direction and equal in size to the permanent magnetic flux, cancels the holding attraction force of the permanent magnet, and the moving iron core completes the rapid switching of the two stable states under the joint action of the drive coil and the cancellation coil.

[0101] The above is the complete working principle of the electromagnetic valve provided by the embodiment of the present application, wherein the electromagnetic valve provided by the embodiment has the following technical effects:

[0102] First, the electromagnetic valve provided by the present application has the advantage of fast response, wherein the fast response can be reflected in that the strong attraction force is generated by energizing the drive coil group 600, and the permanent magnet magnetic force is canceled by energizing the cancellation coil, so that the moving iron core is released while driving the valve to quickly open or close.

[0103] Second, the electromagnetic valve provided by the present application has the advantage of bistability, wherein the bistability can be reflected in that the stable opening and stable closing of the valve are maintained by the attraction force of the permanent magnet.

[0104] Third, the electromagnetic valve provided by the present application has the advantage of low power consumption, wherein the low power consumption is reflected in that the permanent magnet is used to replace the conventional counterforce spring, and the valve is not continuously energized to maintain the opening state, but only needs to consume power at the moment of stable state transformation.

[0105] ​Fourth, the application integrates the advantages of axial flow and self-locking electromagnetic valve, the first cover 100 is provided with a first flow guide pipe 110, and the second flow guide pipe 410 is arranged in the driving member 400, so that the opening and closing time of the valve can be adjusted by controlling the left and right suction of the driving member 400, thereby realizing the quick and accurate control function of the quantity and regularity of the fluid medium.

[0106] It can be understood that the opening and closing time can be adjusted according to actual conditions, and the opening and closing time length can be adjusted by adjusting the energization time of the electromagnetic 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 electromagnetic valve, thereby adjusting the opening and closing time of the valve. The present embodiment does not limit this.

[0107] Fifth, the application uses two driving coils to independently control the opening and closing of the valve body, replacing the counterforce spring used in conventional electromagnetic valves, and has the advantages of simple structure, convenient assembly, no maintenance, fast opening and closing valve speed, etc., and can meet the requirements of accurate control of liquid or gas inlet, outlet, flow, pressure and direction.

[0108] Sixth, the application uses two permanent magnets to replace the conventional counterforce spring for maintaining the opening and closing states of the valve, solving the problem that the conventional electromagnetic valve needs to overcome the spring counterforce during the suction process, resulting in the problem that the holding force and the suction force cannot be considered, and the valve does not need to be continuously energized in the open state, having the advantages of fast switching speed in steady state, no heating, low power consumption and energy saving.

[0109] Seventh, the application uses two driving coils to realize fast and accurate response and stable maintenance of the valve, and the overall structure is symmetrically arranged, the opening and closing valves are independently controlled, and has the advantages of large steady-state position holding force, strong interference resistance, state conversion without coupling, simple control logic, etc.

[0110] Eighth, the first and second counterforce coils 910 and 920 are symmetrically arranged, and the first and second driving coils 610 and 620 are arranged in this way, so that the overall structure is simple to assemble, the opening and closing valve actions are independent of each other, and the state conversion is uncoupled.

[0111] Ninth, the driving coil is matched with the corresponding counterforce coil to complete the accurate and fast opening and closing valve action, the permanent magnet is used for stable state maintenance, and the counterforce coil is used for fast state conversion.

[0112] It should be noted that the connection mode of the driving coil and the corresponding counterforce coil is not limited. For example, the driving coil and the corresponding counterforce coil can be connected in series. In this way, the control logic can be simplified while meeting the requirements of fast and accurate control.

[0113] It should be noted that no matter the electromagnetic valve is opened or closed, the magnetic member 700 provides the attraction holding force. If the attraction force is smaller or significantly smaller than the theoretical value, it should be checked whether there is a larger gap between the permanent magnet and the top rod assembly 500.

[0114] In a possible implementation, referring to Figure 1 As shown in the figure, the winding support 120 can also be connected to the first cover 100. Specifically, after the driving coil set 600 is assembled on the winding support 120, the winding support 120 is arranged on the outer periphery of the driving stator yoke 300.

[0115] In this embodiment, the structure of the winding support 120 is not limited. For example, the winding support 120 in this embodiment can be a winding rail.

[0116] In this way, the design of the winding rail provides a structural support, so that the driving coil set 600 can be uniformly arranged on the outer periphery of the driving stator yoke 300, which helps to maintain the shape and position of the driving coil set 600 and prevent displacement or deformation during operation.

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

[0118] In a possible implementation, one of the winding support 120 and the driving member 400 can be provided with a guide sliding table along the first direction or the second direction, and the other of the winding support 120 and the driving member 400 can be provided with a guide sliding groove; when the driving member 400 moves along the first direction or the second direction, the guide sliding table slides in the guide sliding groove.

[0119] In this embodiment, referring to Figure 2 As shown in the figure, the guide sliding table 420 is mainly arranged on the driving member 400, and the guide sliding groove 121 is mainly arranged on the winding support 120. In this way, the guide sliding table 420 and the guide sliding groove 121 slide in cooperation, which helps to guide the sliding of the driving member 400, thereby avoiding the deviation of the movement path of the driving member 400 and maximizing the control accuracy of the electromagnetic valve.

[0120] In this embodiment, one of the driving stator yoke 300 and the winding support 120 can be provided with a positioning step, and the other of the driving stator yoke 300 and the winding support 120 can be provided with a positioning groove, and the positioning step is located in the positioning groove. In this embodiment, the position, number, size, shape, etc. of the positioning step and the positioning groove are not limited.

[0121] In this way, under the cooperation of the positioning steps and the positioning grooves, the winding rail is prevented from rotating in the circumferential direction, thereby ensuring the assembly stability of the driving coil group 600 and the winding rail.

[0122] In one possible implementation, referring to Figure 2 As shown in the figure, the counter stator yoke 800 can be provided with an assembly groove 830, and the magnetic member 700 is installed in the assembly groove 830. In this way, on the one hand, the magnetic member 700 can be fixed and positioned to 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, referring to Figure 1 As shown in the figure, the electromagnetic valve can further include a buffer member 1000, which 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 top 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 of the top rod assembly 500 and the permanent magnet, and help improve the sealing effect between the top rod assembly 500 and the permanent magnet, reducing the magnetic leakage phenomenon. For example, the buffer member 1000 of the present embodiment can be a buffer gasket.

[0125] The electromagnetic valve provided by the embodiment of the present application can, on the one hand, be provided with a first flow guide pipe on the first cover body and a second flow guide pipe in the driving member, so as to adjust 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, thereby achieving the function of quickly and accurately controlling the amount and regularity 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, which has the advantages of simple structure, convenient assembly, no maintenance, same fast switching valve speed, etc. compared with the counterforce spring used in the conventional electromagnetic valve, and can meet the requirements of accurately controlling the inflow, flow, pressure and direction of liquid or gas; on the other hand, the present application uses two magnetic members to replace the conventional counterforce spring to keep the valve in the open and closed states, which solves the problem that the conventional electromagnetic valve needs to overcome the spring counterforce during the attraction process, so that the holding force and the attraction force cannot be considered, and the valve does not need to be continuously powered when keeping the open state, which has the advantages of fast steady-state switching speed, no heating, low power consumption and energy saving; on the other hand, the present application uses two driving coils to cooperate with two counter 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 is independently controlled, and has the advantages of large steady-state position holding force, strong anti-interference ability, state conversion without coupling, simple control logic, etc.

[0126] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

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

[0128] Unless otherwise clearly specified and limited, the terms "mount", "connect", "connect", "fix", and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or become an integral part; can be directly connected, can also be indirectly connected through an intermediate medium, can make the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated.

[0129] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. An electromagnetic valve characterized by comprising: The first cover body and the second cover body are provided, and a first flow guide pipe is arranged on the first cover body; The first cover body is provided with a driving stator yoke, a driving member, a top rod assembly and a driving coil group. The driving stator yoke comprises 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 the opposite ends of the first cover body along a first direction; The top rod assembly comprises a first top rod and a second top rod. The first top rod is arranged through the first driving stator yoke and connected to one end of the driving member. The second top rod is arranged through the second driving stator yoke and connected to the other end of the driving member. The driving coil group comprises a first driving coil and a second driving coil. The first driving coil is arranged around the outer periphery of the first driving stator yoke. The second driving coil is arranged around the outer periphery of the second driving stator yoke. A second flow guide pipe is arranged in the driving member, and the extension direction of the second flow guide pipe is parallel to the extension direction of the first flow guide pipe; The second cover body comprises a first sub-cover body and a second sub-cover body. The first sub-cover body and the second sub-cover body are connected to the opposite sides of the first cover body along the first direction. The first sub-cover body is provided with a first magnetic member, a first offset stator yoke and a first offset coil. The first magnetic member is arranged in the first offset stator yoke. The first offset coil is arranged around the outer periphery of the first offset stator yoke. The second sub-cover body is provided with a second magnetic member, a second offset stator yoke and a second offset coil. The second magnetic member is arranged in the second offset stator yoke. The second offset coil is arranged around the outer periphery of the second offset stator yoke. When the electromagnetic valve receives an opening signal, the second driving coil and the first offset coil are energized, the driving member moves along a first direction, and 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 closing signal, the first driving coil and the second offset coil are energized, the driving member moves along a second direction, and the first flow guide pipe and the second flow guide pipe are misaligned and closed in the second direction. The first direction and the second direction are two directions away from each other and cross the extension directions of the first flow guide pipe and the second flow guide pipe.

2. The electromagnetic valve according to claim 1, characterized by When the electromagnetic valve is in a closed state, neither the driving coil group nor the offset coil group is energized. The first top rod is attracted to the first magnetic member, and together with the first offset stator yoke and the first sub-cover body, forms a permanent magnet closed magnetic circuit and generates a first permanent magnetic flux. The first top rod is fixedly connected to the driving member, and the electromagnetic valve is in a closed self-locking state. When the electromagnetic valve is in a closed state and receives an opening signal, the second driving coil and the first offset coil are energized, the first driving coil and the second offset coil are not energized, and the size of the first offset coil and the first permanent magnetic flux is equal and the direction is opposite.

3. The electromagnetic valve according to claim 2, characterized by ​ Under the action of the second driving coil, the driving member moves in the first direction, and the first flow guide pipe and the second flow guide pipe are aligned and conductive in the first direction.

4. The electromagnetic valve according to claim 3, characterized by When the electromagnetic valve is in the open valve state, the second driving coil is continuously energized, the driving member continuously moves in the first direction, the driving member is attracted to the second driving stator yoke, the second top rod is attracted to the second magnetic member, and the second top rod, the second counter stator yoke and the second sub-housing together form a permanent magnet closed magnetic circuit and generate a second permanent magnet magnetic flux; the second top rod is fixedly connected with the driving member, and the electromagnetic valve is in the open valve self-locking state. Wherein, the first flow guide pipe and the second flow guide pipe remain aligned and conductive in the first direction.

5. The electromagnetic valve according to claim 4, characterized by When the electromagnetic valve is in the open valve state and receives a closed valve signal, the first driving coil and the second counter coil are energized, the second driving coil and the first counter coil are not energized, and the second counter coil and the second permanent magnet magnetic flux are equal in size and opposite in direction. Under the action of the first driving coil, the driving member moves in the second direction, and the first flow guide pipe and the second flow guide pipe are misaligned in the second direction.

6. The electromagnetic valve according to any one of claims 1 to 5, characterized by Further comprising a winding support connected to the first housing, and the driving coil group is wound around the outer periphery of the driving stator yoke through the winding support.

7. The electromagnetic valve according to claim 6, characterized by In the first direction or the second direction, one of the winding support and the driving member is provided with a guide sliding table, and the other of the winding support and the driving member is provided with a guide sliding groove; when the driving member moves in the first direction or the second direction, the guide sliding table slides in the guide sliding groove. And / or, one of the driving stator yoke and the winding support is provided with a positioning step, and the other of the driving stator yoke and the winding support is provided with a positioning groove, and the positioning step is located in the positioning groove.

8. The electromagnetic valve according to any one of claims 1 to 5, characterized by The counter stator yoke is provided with an assembly groove, and the magnetic member is installed in the assembly groove. The electromagnetic valve further comprises a buffer member, and the buffer member is installed in the assembly groove and surrounds the outer periphery of the magnetic member.

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