Electromagnet structure and electromagnetic valve

Abstract

The utility model discloses an electromagnet structure and an electromagnetic valve, and belongs to the technical field of electromagnetic valves. The electromagnet structure comprises a magnetic conductive framework, a moving iron and a tail yoke; the moving iron is slidably arranged in the magnetic conductive framework along the X axis. One part of the tail yoke is arranged in the magnetic conductive framework and connected with the moving iron in a sleeved mode, the other part of the tail yoke extends out of the magnetic conductive framework, and the length of the part, located outside the magnetic conductive framework, of the tail yoke on the X axis is smaller than the preset length. According to the electromagnet structure, the length of the part, located outside the magnetic conductive framework, of the tail yoke on the X axis is smaller than the preset length, so that it is guaranteed that the length of the part, located outside the magnetic conductive framework, of the tail yoke on the X axis is small, the occupied space of the part, located outside the magnetic conductive framework, of the tail yoke can be reduced, and optimal utilization of the space in the whole electromagnetic valve is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to an electromagnet structure and a solenoid valve. Background Art

[0002] At present, solenoid valves are mainly divided into two types: pull-type solenoid valves and push-type solenoid valves. The specific distinction is based on the movement direction of the moving iron in the solenoid valve. When the moving iron pushes the valve core to move, it is a push-type solenoid valve. When the moving iron pulls the valve core to move, it is a pull-type solenoid valve.

[0003] However, in a push-type solenoid valve, the tail bell and the moving iron are directly in end-face contact, resulting in a longer length of the portion of the tail bell outside the magnetic frame, which makes the portion of the tail bell outside the magnetic frame occupy a larger space, which is not conducive to the rational use of the space inside the solenoid valve.

[0004] In view of the above problems, an electromagnet structure and an electromagnetic valve are urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to propose an electromagnet structure and an electromagnetic valve, which can ensure that the length of the part of the tail valve located outside the magnetic conductive frame on the X-axis is shorter, thereby reducing the space occupied by the tail valve and facilitating the optimal utilization of the space inside the entire electromagnetic valve.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The electromagnet structure comprises:

[0008] Magnetic skeleton;

[0009] A moving iron is arranged in the magnetic conductive frame for sliding along the X axis;

[0010] The tail bell, a part of the tail bell is arranged in the magnetic conductive frame and is sleeved with the moving iron, the other part of the tail bell extends outside the magnetic conductive frame, and the length of the part of the tail bell located outside the magnetic conductive frame on the X-axis is less than the preset length.

[0011] As an optional solution, the tail end includes:

[0012] A tailgate body, a portion of which is disposed within the magnetically conductive frame, and another portion of which extends outside the magnetically conductive frame;

[0013] A plug-in rod is connected to the tail-end main body, the plug-in rod is plug-fitted with the moving iron, and the moving iron can move along the X-axis relative to the plug-in rod.

[0014] As an optional solution, the electromagnet structure further includes:

[0015] A magnetic isolation member is installed in the moving iron, the magnetic isolation member is arranged opposite to the plug-in rod, and a first gap is provided between the magnetic isolation member and the plug-in rod on the X-axis.

[0016] As an optional solution, the electromagnet structure further includes:

[0017] The magnetic isolation sleeve is sleeved outside the movable iron and at least a portion of the tail rotor body, and a second gap is formed between the magnetic isolation sleeve and the movable iron.

[0018] As an optional solution, the tail bell main body has a step surface, and one end of the magnetic isolation sleeve abuts against the step surface, so that the outer circumferential surface of the tail bell main body is flush with the outer circumferential surface of the magnetic isolation sleeve.

[0019] As an optional solution, the electromagnet structure further includes:

[0020] A stop iron, at least part of which is disposed in the magnetic isolation sleeve, and the stop iron is capable of magnetically adhering to the moving iron;

[0021] A front bell, a portion of which is sleeved outside a portion of the stop iron, and a portion of which is sleeved outside a portion of the magnetic isolation sleeve;

[0022] The push rod is inserted into the stop iron while sliding along the X axis. The end of the push rod located in the stop iron contacts the moving iron, and the moving iron can push the push rod to move along the X axis.

[0023] As an optional solution, the moving iron includes a connected cylinder and a cone, the stop iron has a cone end face, the cone end face can be magnetically attached to the cone, and the push rod is in contact with the cone.

[0024] As an optional solution, a first through hole extending along the X-axis is provided in the moving iron, and a straight groove is provided at the end of the push rod in contact with the conical body, and the straight groove is connected to the first through hole.

[0025] As an optional solution, a second through hole is provided on the cylinder, and the second through hole is communicated with the first through hole.

[0026] The solenoid valve includes a winding, a valve core and the electromagnet structure as described above. The winding is wound in the magnetic conductive frame, and the push rod of the electromagnet structure is arranged between the moving iron and the valve core. When the winding is energized, it can drive the moving iron to push the valve core along the X-axis.

[0027] The beneficial effects of the utility model are:

[0028] By sliding the moving iron along the X-axis in the magnetic frame, a part of the tail bell is arranged in the magnetic frame and is sleeved with the moving iron, and the other part of the tail bell extends outside the magnetic frame; compared with the end face abutment connection method in the prior art, the sleeve connection method is used to connect the moving iron and the tail bell, which can shorten the overall length of the moving iron and the tail bell after assembly, so that the partial length of the tail bell coincides with the moving stroke of the moving iron, so that the length of the part of the tail bell located outside the magnetic frame on the X-axis can be less than the preset length, so as to ensure that the length of the part of the tail bell located outside the magnetic frame on the X-axis is shorter, thereby reducing the occupied space of the part of the tail bell located outside the magnetic frame, which is beneficial to the optimal utilization of the space in the entire solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the electromagnet structure (including winding) provided by the utility model Figure 1 ;

[0030] Figure 2 This is a cross-sectional view of the electromagnet structure (including windings) provided by the utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the electromagnet structure provided by the utility model (excluding the magnetic framework) Figure 2 ;

[0032] Figure 4 This is a schematic diagram of the assembly structure between the tailgate, lock nut, moving iron, stop iron and push rod provided by the utility model;

[0033] Figure 5 This is a schematic diagram of the structure in which the tailgate and the stop iron provided by the present invention are not assembled to the moving iron.

[0034] Description of reference numerals:

[0035] 1-magnetic skeleton; 2-moving iron; 21-cylinder; 22-conical body; 23-first through hole; 24-second through hole;

[0036] 3-tail flange; 31-tail flange body; 311-stepped surface; 32-connecting rod; 4-locking nut; 5-magnetic isolation member; 6-magnetic isolation sleeve; 7-stop iron; 71-tapered end surface; 8-front flange; 9-push rod; 91-straight groove;

[0037] 10- Winding. DETAILED DESCRIPTION

[0038] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0039] Any feature disclosed in this specification, unless otherwise stated, may be replaced by an equivalent or similar alternative feature. That is, unless otherwise stated, each feature is merely an example of a set of equivalent or similar features. Throughout this specification, like reference numerals refer to like elements.

[0040] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0041] This embodiment provides an electromagnet structure and a solenoid valve including the electromagnet structure. The electromagnet structure can ensure a relatively compact structure, reduce occupied space, and optimize the use space within the entire solenoid valve. The electromagnet structure in this embodiment can be applied to a push-type solenoid valve, which can specifically be a hydraulic threaded cartridge solenoid valve.

[0042] Specifically, if Figure 1 and Figure 2 As shown, the solenoid valve also includes a winding 10 and a valve core. The electromagnet structure includes a magnetic skeleton 1, a movable iron 2, and a tail 3. The winding 10 is wound within the magnetic skeleton 1. The push rod 9 of the electromagnet structure is arranged between the movable iron 2 and the valve core. When the winding 10 is energized, it can generate an electromagnetic field, thereby directly pushing the valve core along the X-axis through the electromagnetic thrust on the movable iron 2 to achieve the movement of the valve core. Here, the winding 10 and the valve core are both common structures in existing solenoid valves, and the specific structure and working principle of the winding 10 and the valve core will not be described in detail.

[0043] Specifically, if Figure 2 As shown, the moving iron 2 is slidingly arranged in the magnetic skeleton 1 along the X-axis; a part of the tail nut 3 is arranged in the magnetic skeleton 1 and is sleeved with the moving iron 2, and the other part of the tail nut 3 extends outside the magnetic skeleton 1, and the length of the part of the tail nut 3 located outside the magnetic skeleton 1 on the X-axis is less than the preset length. Among them, the preset length is less than the length of the part of the tail nut 3 located outside the magnetic skeleton 1 on the X-axis when the moving iron 2 and the tail nut 3 are directly abutted by end faces. Here, the specific value of the preset length is not limited and needs to be determined according to the overall layout and working conditions. In this embodiment, the material of the moving iron 2 and the material of the tail nut 3 are both magnetic materials.

[0044] The electromagnet structure in this embodiment changes the connection method of the moving iron 2 and the tail shank 3 compared with the prior art; by sliding the moving iron 2 along the X-axis and setting it in the magnetic skeleton 1, a part of the tail shank 3 is set in the magnetic skeleton 1 and is sleeved with the moving iron 2, and the other part of the tail shank 3 extends outside the magnetic skeleton 1; compared with the end-face abutment connection method in the prior art, the use of a sleeve connection method to connect the moving iron 2 and the tail shank 3 can shorten the overall length of the moving iron 2 and the tail shank 3 after assembly, so that the length of part of the tail shank 3 coincides with the moving stroke of the moving iron 2, so that the length of the part of the tail shank 3 located outside the magnetic skeleton 1 on the X-axis is less than the preset length, so as to ensure that the length of the part of the tail shank 3 located outside the magnetic skeleton 1 on the X-axis is shorter, thereby reducing the space occupied by the part of the tail shank 3 located outside the magnetic skeleton 1, which is conducive to the optimal utilization of the space in the entire solenoid valve. The working principle of the magnetic skeleton 1, the moving iron 2 and the tail shank 3 in this embodiment is the common working principle in the existing solenoid valve, and its working principle will not be described in detail here.

[0045] It is worth noting that the above-mentioned socketing method can not only shorten the occupied length of the tail bell 3 on the X-axis, but also ensure the magnetic conductivity of the tail bell 3, and thus ensure that the electromagnetic thrust generated on the moving iron 2 meets the use requirements.

[0046] Furthermore, if Figure 2 、 Figure 4 and Figure 5 As shown, the tailgate 3 includes a tailgate body 31 and a connecting rod 32. Part of the tailgate body 31 is located within the magnetic frame 1, while another part extends outside the magnetic frame 1. The connecting rod 32 extends along the X-axis. One end of the connecting rod 32 is connected to an end surface of the tailgate body 31 located within the magnetic frame 1, and the other end of the connecting rod 32 is plugged into the movable iron 2, allowing the movable iron 2 to move along the X-axis relative to the connecting rod 32. In this embodiment, the tailgate body 31 and the connecting rod 32 are an integrated structure.

[0047] By enabling the movable iron 2 to move along the X-axis relative to the plug-in rod 32 , the plug-in rod 32 can provide guidance for the movement of the movable iron 2 , thereby ensuring guidance and stability of the movable iron 2 moving along the X-axis.

[0048] Moreover, by inserting the other end of the plug-in rod 32 into the moving iron 2, that is, making the connection between the tail 3 and the moving iron 2 a plug-in connection; on the one hand, making the connection between the tail 3 and the moving iron 2 relatively simple and convenient, and easy to disassemble; on the other hand, by means of a plug-in connection, the tail 3 and the moving iron 2 can have a portion of overlap, thereby shortening the overall length of the tail 3 and the moving iron 2 on the X-axis, ensuring the optimal utilization of the space inside the entire solenoid valve; and, the electromagnetic force generated inside the solenoid valve is transmitted through the overlapping portion between the tail 3 and the moving iron 2. Here, the moving iron 2 can also be inserted into the plug-in rod 32, and the specific socketing method between the specific moving iron 2 and the tail 3 is not limited.

[0049] Furthermore, if Figure 2 As shown, the electromagnet structure also includes a magnetic isolation member 5, which is installed in the moving iron 2. The magnetic isolation member 5 is specifically installed in the moving iron 2, and the magnetic isolation member 5 is arranged opposite to the plug-in rod 32. The material of the magnetic isolation member 5 is a non-magnetic material, so that there is a first gap between the magnetic isolation member 5 and the plug-in rod 32 on the X-axis.

[0050] By disposing a non-magnetic magnetic shielding member 5 within the movable iron 2, and since both the tailgate 3 and the movable iron 2 are magnetically conductive, the relative arrangement of the magnetic shielding member 5 and the plug-in rod 32 enables the magnetic shielding member 5 to function as a position limiter between the plug-in rod 32 and the movable iron 2, ensuring a first gap between the magnetic shielding member 5 and the plug-in rod 32 on the X-axis. This prevents the movable iron 2 and the plug-in rod 32 from being too close together on the X-axis and thus engaging, thereby effectively ensuring the reliability of the movable iron 2's movement on the X-axis. The specific value of the first gap is not limited here and needs to be determined based on the specific operating conditions.

[0051] Specifically, the magnetic isolation member 5 can be a magnetic isolation ring. Correspondingly, an annular groove is provided in the movable iron 2 so that the magnetic isolation ring can be directly clamped and limited into the annular groove.

[0052] Furthermore, if Figure 2 and Figure 3 As shown, the electromagnet structure also includes a magnetic isolation sleeve 6, which is sleeved outside at least part of the moving iron 2 and at least part of the tail iron body 31. The material of the magnetic isolation sleeve 6 is non-magnetic material, and there is a second gap between the inner circumference of the magnetic isolation sleeve 6 and the outer circumference of the moving iron 2.

[0053] By providing a second gap between the inner circumference of the magnetic isolation sleeve 6 and the outer circumference of the moving iron 2, that is, there is no direct contact between the moving iron 2 and the magnetic isolation sleeve 6, on the one hand, it can avoid the wear caused by contact friction between the moving iron 2 and the magnetic isolation sleeve 6 during movement, thereby better protecting the moving iron 2 and the magnetic isolation sleeve 6; on the other hand, it can avoid the problem of positional offset of the moving iron 2 caused by contact friction between the moving iron 2 and the magnetic isolation sleeve 6, thereby ensuring the stability of the moving iron 2 in moving on the X-axis; at the same time, since there is no need to ensure the appropriate abutment accuracy between the inner circumference of the magnetic isolation sleeve 6 and the outer circumference of the moving iron 2, the processing difficulty of the magnetic isolation sleeve 6 can be reduced, ensuring that the processing of the magnetic isolation sleeve 6 is relatively simple and easy.

[0054] Furthermore, if Figures 2 to 5 As shown, the tail ear main body 31 has a step surface 311, and one end of the magnetic isolation sleeve 6 abuts against the step surface 311, so that the outer peripheral surface of the tail ear main body 31 is flush with the outer peripheral surface of the magnetic isolation sleeve 6. On the one hand, it can ensure the aesthetic appearance of the outer peripheral surface of the tail ear main body 31 and the outer peripheral surface of the magnetic isolation sleeve 6 after assembly; on the other hand, it can facilitate the installation of other components on the flush outer peripheral surface of the tail ear main body 31 and the outer peripheral surface of the magnetic isolation sleeve 6.

[0055] Specifically, if Figures 2 to 5 As shown, the electromagnet structure also includes a stop iron 7, a front nut 8, and a push rod 9; wherein, at least a portion of the stop iron 7 is disposed within the magnetic isolation sleeve 6, and the stop iron 7 can be magnetically attached to the movable iron 2; a portion of the front nut 8 is sleeved outside a portion of the stop iron 7, and a portion of the front nut 8 is sleeved outside a portion of the magnetic isolation sleeve 6; the push rod 9 is slidably inserted into the stop iron 7 along the X-axis, and the end of the push rod 9 located within the stop iron 7 is in direct contact with the movable iron 2, so that the movable iron 2 can directly push the push rod 9 to move along the X-axis. The material of the front nut 8 and the stop iron 7 are both magnetic conductive materials, and the material of the push rod 9 is non-magnetic conductive material.

[0056] Specifically, if Figure 2 and Figure 5 As shown, the movable iron 2 comprises a connected cylindrical body 21 and a conical body 22. The cylindrical body 21 slides along the X-axis within the magnetically conductive frame 1. The stop iron 7 has a conical end surface 71 that can magnetically adhere to the conical body 22, and the push rod 9 is in contact with the conical body 22. The magnetic isolation member 5 is provided at the connection between the cylindrical body 21 and the conical body 22, and the connecting rod 32 is inserted into the cylindrical body 21. In this embodiment, the cylindrical body 21 and the conical body 22 are an integrated structure.

[0057] like Figure 2 and Figure 5As shown, by making the conical end face 71 of the stop iron 7 and the conical body 22 of the movable iron 2 magnetically fit together, the magnetic bonding area between the stop iron 7 and the movable iron 2 can be increased by the tapered surface fit, so that the magnetic stability between the stop iron 7 and the movable iron 2 is better. In other embodiments, the stop iron 7 and the movable iron 2 can also be made into a plane fit magnetic attraction structure or a step fit magnetic attraction structure. Here, the specific fit magnetic attraction structure is not limited. Further, as Figure 4 and Figure 5 As shown, a first through hole 23 extending along the X-axis is provided in the moving iron 2, and a straight groove 91 is provided at the end of the push rod 9 that contacts the cone 22. The straight groove 91 is connected to the first through hole 23, and the connecting rod 32 is inserted into the first through hole 23.

[0058] By connecting the straight groove 91 with the first through hole 23, the two opposite ends of the moving iron 2 on the X-axis can be connected, so that during the linear motion of the moving iron 2, the oil at the two opposite ends of the moving iron 2 on the X-axis can be interconnected, thereby preventing pressure buildup and hindering the movement of the moving iron 2, and further ensuring the smoothness and reliability of the movement of the moving iron 2.

[0059] Specifically, if Figure 4 and Figure 5 As shown, a second through hole 24 is provided on the cylinder 21, and the second through hole 24 is connected to the first through hole 23, so as to further enable the oil at the two opposite ends of the moving iron 2 on the X-axis to communicate with each other, thereby better ensuring the smoothness and reliability of the movement of the moving iron 2.

[0060] Further, if Figures 1 to 4 As shown, the electromagnet structure also includes a locking nut 4, which is threadedly connected to the part of the tail bell body 31 located outside the magnetic skeleton 1, and the locking nut 4 can be pressed against one end face of the magnetic skeleton 1 so that the tail bell 3 can be locked by the locking nut 4 to ensure the stability of the position of the tail bell 3.

[0061] By threading the locking nut 4 onto the portion of the tail bell body 31 located outside the magnetic conductive frame 1, and since the length of the portion of the tail bell body 31 located outside the magnetic conductive frame 1 on the X-axis is less than the preset length, the length of the locking nut 4 threadedly connected to the tail bell body 31 on the X-axis can also be shorter, thereby reducing the space occupied by the locking nut 4, which is further beneficial to the optimal utilization of the space inside the entire solenoid valve.

[0062] The electromagnet structure in this embodiment makes the length of the part of the tail bell 3 located outside the magnetic frame 1 on the X-axis less than the preset length, and makes the locking nut 4 threadedly connected to the part of the tail bell 3 located outside the magnetic frame 1, so as to reduce the space occupied by the tail bell 3 and the locking nut 4 respectively outside the magnetic frame 1, which is beneficial to the optimal utilization of the space in the entire solenoid valve.

[0063] The electromagnet structure in this embodiment prevents the moving iron 2 and the rear ear from being attracted due to being too close to each other on the X-axis by providing a first gap between the non-magnetic magnetic isolation member 5 and the plug-in rod 32, thereby effectively ensuring the smoothness and reliability of the moving iron 2 moving toward the front ear 8 on the X-axis.

[0064] The electromagnet structure in this embodiment can prevent the moving iron 2 from wearing due to contact friction with the magnetic isolation sleeve 6 during movement by providing a second gap between the inner circumference of the magnetic isolation sleeve 6 and the outer circumference of the cylinder 21 of the moving iron 2. This can better protect the moving iron 2 and the magnetic isolation sleeve 6, and can also avoid the problem of positional displacement of the moving iron 2 caused by contact friction between the moving iron 2 and the magnetic isolation sleeve 6.

[0065] The electromagnet structure in this embodiment can ensure that the oil at the opposite ends of the moving iron 2 on the X-axis can communicate with each other by connecting the straight groove 91 of the push rod 9 with the first through hole 23 of the moving iron 2, and connecting the first through hole 23 of the moving iron 2 with the second through hole 24, thereby avoiding the occurrence of pressure buildup that affects the smooth movement of the moving iron 2.

[0066] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. Electromagnet structure, characterized in that, include: Magnetic conductive frame (1); A moving iron (2) is arranged in the magnetic conductive frame (1) so as to slide along the X-axis; A tail stop (3), a portion of the tail stop (3) is arranged in the magnetic conductive frame (1) and is sleeved with the moving iron (2), another portion of the tail stop (3) extends outside the magnetic conductive frame (1), and the length of the portion of the tail stop (3) located outside the magnetic conductive frame (1) on the X-axis is less than a preset length.

2. The electromagnet structure according to claim 1, wherein: The tail disease (3) includes: A tail-end body (31), a portion of the tail-end body (31) is disposed within the magnetic conductive frame (1), and another portion of the tail-end body (31) extends outside the magnetic conductive frame (1); A plug-in rod (32), the plug-in rod (32) is connected to the tail end body (31), the plug-in rod (32) is plug-fitted with the movable iron (2), and the movable iron (2) can move along the X axis relative to the plug-in rod (32).

3. The electromagnet structure according to claim 2, wherein: The electromagnet structure further comprises: A magnetic isolation member (5) is installed in the moving iron (2), the magnetic isolation member (5) is arranged opposite to the plug-in rod (32), and a first gap is provided between the magnetic isolation member (5) and the plug-in rod (32) on the X-axis.

4. The electromagnet structure according to claim 2, wherein: The electromagnet structure further comprises: The magnetic isolation sleeve (6) is sleeved outside the movable iron (2) and at least a portion of the tail iron body (31), and a second gap is provided between the magnetic isolation sleeve (6) and the movable iron (2).

5. The electromagnet structure according to claim 4, wherein: The tailgate body (31) has a stepped surface (311), and one end of the magnetic isolation sleeve (6) abuts against the stepped surface (311), so that the outer peripheral surface of the tailgate body (31) is flush with the outer peripheral surface of the magnetic isolation sleeve (6).

6. The electromagnet structure according to claim 4 or 5, characterized in that: The electromagnet structure further comprises: A stop iron (7), at least a portion of which is disposed in the magnetic isolation sleeve (6), and the stop iron (7) is capable of magnetically adhering to the moving iron (2); A front nut (8), a portion of which is sleeved outside a portion of the stop iron (7), and a portion of which is sleeved outside a portion of the magnetic isolation sleeve (6); The push rod (9) is inserted into the stop iron (7) by sliding along the X-axis. The end of the push rod (9) located in the stop iron (7) contacts the moving iron (2), and the moving iron (2) can push the push rod (9) to move along the X-axis.

7. The electromagnet structure according to claim 6, wherein: The movable iron (2) comprises a connected cylinder (21) and a conical body (22); the stop iron (7) has a conical end face (71); the conical end face (71) can be magnetically attached to the conical body (22); and the push rod (9) is in contact with the conical body (22).

8. The electromagnet structure according to claim 7, wherein: A first through hole (23) extending along the X-axis is provided in the movable iron (2); a straight groove (91) is provided at the end of the push rod (9) in contact with the conical body (22); and the straight groove (91) is connected to the first through hole (23).

9. The electromagnet structure according to claim 8, wherein: The cylindrical body (21) is provided with a second through hole (24), and the second through hole (24) is communicated with the first through hole (23).

10. Solenoid valve, characterized in that, The invention comprises a winding (10), a valve core and an electromagnet structure as described in any one of claims 1 to 9, wherein the winding (10) is wound inside the magnetic conductive skeleton (1), and the push rod (9) of the electromagnet structure is arranged between the moving iron (2) and the valve core. When the winding (10) is energized, it can drive the moving iron (2) to push the valve core along the X-axis.

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