Modularized electromagnetic assembly, direct-acting electromagnetic valve and pilot-operated electromagnetic valve

Abstract

The utility model provides a modular electromagnetic assembly, a direct-acting electromagnetic valve and a pilot-operated electromagnetic valve, and relates to the field of valves. The electromagnetic assembly comprises a valve cover which is configured to be installed on a valve body of the normally-open electromagnetic valve, the valve cover is provided with a through hole, and one side of the valve cover protrudes outwards on the outer periphery of the through hole to form a static iron core part; the outer sleeve is provided with a cavity with an opening in one end, and the outer sleeve is inserted into the outer periphery of the static iron core through the opening of the cavity and fixedly connected with the valve cover; the movable iron core is movably mounted in the cavity and corresponds to the static iron core part; the spring is arranged between the valve cover and the movable iron core, one end of the spring abuts against the movable iron core, the other end of the spring abuts against the valve cover, and the spring is configured to provide elastic force far away from the static iron core part for the movable iron core; the coil assembly is arranged on the outer periphery of the outer sleeve and is configured to enable the static iron core to generate electromagnetic force on the movable iron core when the coil assembly is powered on. The electromagnetic valve is modularized and can be suitable for different types of electromagnetic valves.

Description

Technical Field

[0001] The utility model relates to the field of valves, and in particular to a modular electromagnetic assembly, a direct-acting electromagnetic valve and a pilot electromagnetic valve. Background Technology

[0002] The solenoid valve is an industrial device controlled by electromagnetics. It is a basic component for controlling fluid automation and belongs to an actuator. It is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium.

[0003] Solenoid valves can be divided into normally open solenoid valves and normally closed solenoid valves. Normally open solenoid valves are connected between the inlet and outlet when the coil is powered off, and normally closed solenoid valves are closed between the inlet and outlet when the coil is powered off.

[0004] The normally open solenoid valve can be divided into direct-acting type and pilot-operated type. The existing normally open solenoid valve needs to assemble the scattered parts on the valve body in sequence according to the type of solenoid valve. It cannot realize modular assembly, resulting in low assembly efficiency, relatively large number of parts, and high cost. Contents of utility model

[0005] The purpose of the utility model is to provide a modular electromagnetic assembly, a direct-acting electromagnetic valve and a pilot-operated electromagnetic valve, which can realize the modular assembly of the electromagnetic assembly and can be applied to direct-acting electromagnetic valves and pilot-operated electromagnetic valves.

[0006] The embodiment of the utility model is implemented as follows:

[0007] In a first aspect, the utility model provides a modular electromagnetic assembly, which is applied to a normally open electromagnetic valve, and the electromagnetic assembly includes:

[0008] A valve cover is configured to be mounted on the valve body of the normally open solenoid valve, the valve cover is provided with a through hole, and one side of the valve cover is convexly formed on the outer periphery of the through hole to form a static iron core;

[0009] An outer sleeve having a cavity with an opening at one end, the outer sleeve is inserted into the outer periphery of the static iron core through the opening of the cavity, and is fixedly connected to the valve cover;

[0010] A moving iron core, the moving iron core is movably installed in the cavity and corresponds to the static iron core;

[0011] A spring is disposed between the valve cover and the moving iron core, with one end abutting against the moving iron core and the other end abutting against the valve cover, and is configured to provide an elastic force to the moving iron core away from the static iron core; and,

[0012] The coil assembly is configured such that the static iron core generates an electromagnetic force on the moving iron core when power is supplied;

[0013] When the coil assembly is powered off, the elastic force of the spring can move the moving iron core in the direction away from the static iron core;

[0014] When the coil assembly is powered on, the electromagnetic force provided by the coil assembly can overcome the elastic force of the spring to move the moving iron core in the direction towards the static iron core.

[0015] In an alternative embodiment, an abutting ring platform is provided on the side wall of the through hole. One end of the spring is inserted into the through hole and abuts against the abutting ring platform.

[0016] In an alternative embodiment, the outer sleeve is inserted into the static iron core part.

[0017] In an alternative embodiment, the moving iron core includes a first section and a second section connected to each other, and the first section and the second section are integrally formed;

[0018] Wherein, the diameter of the second section is larger than that of the first section, and the diameter of the first section is smaller than the diameter of the through hole. The second section is installed in the outer sleeve, and a part of the first section is inserted into the inner cavity of the static iron core part;

[0019] The spring is partially sleeved on the outer periphery of the first section, and the end of the spring away from the valve cover abuts against the end face of the second section close to the first section.

[0020] In an alternative embodiment, a stepped ring groove is provided on one side of the second section close to the first section, and the side wall of the stepped ring groove is inclined towards the center of the moving iron core to form a conical surface;

[0021] A chamfer is provided on the inner periphery of the end plate of the static iron core part, and the chamfer corresponds to the conical surface.

[0022] In an alternative embodiment, a weight-reducing cavity is provided in the second section, and the weight-reducing cavity penetrates through one end of the second section away from the first section.

[0023] In an alternative embodiment, a balance cavity is axially provided in the first section. One end of the balance cavity is communicated with the weight-reducing cavity, and a lateral flow channel is provided in the first section along the radial direction, and the lateral flow channel is communicated with the balance cavity.

[0024] In an alternative embodiment, the electromagnetic assembly further includes a seal;

[0025] A clamping groove is provided at the end of the first section, the seal is installed in the clamping groove, and a communication hole is provided on the bottom wall of the clamping groove, and the communication hole is communicated with the balance cavity.

[0026] In a second aspect, the present utility model provides a direct-acting solenoid valve, which includes a valve body, the electromagnetic assembly and the valve body described in any one of the foregoing embodiments. The valve body is provided with a first opening and a second opening. The first opening is arranged axially on the valve body, and the second opening is arranged on the side wall of the valve body;

[0027] A valve seat protrudes corresponding to the position of the first opening inside the valve body;

[0028] The valve cover is installed on the valve body, and a part of the valve seat extends into the through hole. A flow channel is formed between the valve seat and the side wall of the through hole;

[0029] After the coil assembly is energized, the moving iron core moves downward, so that the seal at the end of the moving iron core abuts and seals against the top of the valve seat, so as to block the communication between the first opening and the second opening;

[0030] When the coil assembly is de-energized, the moving iron core moves upward under the action of the spring, so that the first opening and the second opening are communicated through the flow channel.

[0031] In a third aspect, the present utility model provides a pilot-operated solenoid valve, which includes a pilot valve body, a valve plug, a valve plug spring and the electromagnetic assembly described in any one of the foregoing embodiments;

[0032] The pilot valve body specifically has an inlet and an outlet. The outlet is arranged axially on the pilot valve body, and the inlet is arranged on the side wall of the pilot valve body;

[0033] The valve cover is installed on the pilot valve body;

[0034] The valve plug is movably installed inside the pilot valve body and can move towards the valve cover;

[0035] The valve plug has a pilot hole. The top of the valve plug abuts against a seat corresponding to the pilot hole, and the end of the abutting seat is inserted into the through hole;

[0036] The valve plug spring is configured to provide an elastic force towards the valve cover direction to the valve plug;

[0037] When the coil assembly is energized, the moving iron core can move downward under the action of electromagnetic force. After abutting against the abutting seat, it can drive the valve plug to move downward, so that the valve plug closes the outlet;

[0038] When the coil assembly is de-energized, the moving iron core can move upward under the action of the spring elastic force, so that the pilot hole is opened. The valve plug can be lifted under the action of the valve plug spring, so that the inlet and the outlet are communicated.

[0039] The beneficial effects of the modular electromagnetic component, direct-acting solenoid valve, and pilot-operated solenoid valve provided by the embodiments of the present utility model are as follows:

[0040] In this application, the moving iron core and the spring are installed in the installation space formed by the valve seat and the outer sleeve, and the coil assembly is installed on the outer sleeve, thus realizing the modularization of the electromagnetic component. This modular electromagnetic component can be applied to direct-acting solenoid valves and pilot-operated solenoid valves, facilitating assembly and improving assembly efficiency. Secondly, this modular electromagnetic component has a simple structure, fewer parts, and lower costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative efforts.

[0042] Figure 1 It is a schematic cross-sectional view of the structure of the electromagnetic component provided by the embodiment of the present utility model;

[0043] Figure 2 It is a schematic cross-sectional view of the structure of the direct-acting solenoid valve provided by the embodiment of the present utility model;

[0044] Figure 3 It is a schematic cross-sectional view of the structure of the pilot-operated solenoid valve provided by the embodiment of the present utility model.

[0045] Reference numerals: 100 - modular electromagnetic component; 110 - valve cover; 111 - through hole; 113 - static iron core part; 115 - abutting ring platform; 117 - chamfer; 130 - outer sleeve; 131 - cavity; 140 - moving iron core; 141 - first section; 142 - second section; 143 - stepped annular groove; 144 - conical surface; 145 - weight reduction cavity; 146 - balance cavity; 147 - side flow channel; 148 - clamping groove; 149 - flanging; 150 - spring; 170 - coil assembly; 180 - seal; 300 - direct-acting solenoid valve; 310 - valve body; 311 - first opening; 313 - second opening; 314 - valve seat; 315 - flow channel; 500 - pilot-operated solenoid valve; 510 - pilot valve body; 511 - inlet; 513 - outlet; 530 - valve plug; 531 - pilot hole; 533 - abutting seat; 550 - valve plug spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0048] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0049] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model 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 cannot be construed as a limitation of the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0050] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0051] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0052] Existing normally open solenoid valves require assembling various scattered parts on the valve body in sequence according to the type of the solenoid valve, which cannot achieve modular assembly, resulting in low assembly efficiency, and relatively more parts and higher costs.

[0053] Embodiment 1

[0054] Please refer to Figure 1 , the present utility model provides a modular electromagnetic assembly 100, which is applied to a normally open solenoid valve. Through modular setting, after the modular electromagnetic assembly 100 is pre-assembled in advance, it can be further assembled with parts such as the valve body 310, thereby improving the assembly efficiency, and the modular electromagnetic module can also be used with solenoid valves of different types.

[0055] Please refer to Figure 1 , in this embodiment, the electromagnetic assembly includes a valve body 310, an outer sleeve 130, a moving iron core 140, a spring 150, and a coil assembly 170. The valve cover 110 is configured to be installed on the valve body 310 of the normally open solenoid valve. The valve cover 110 is provided with a through hole 111, and a static iron core portion 113 protrudes outward on one side of the outer periphery of the through hole 111. The outer sleeve 130 has a cavity 131 with one end open. The outer sleeve 130 is inserted into the outer periphery of the static iron core portion 113 through the opening of the cavity 131 and is fixedly connected to the valve cover 110. The moving iron core 140 is movably installed in the cavity 131 and corresponds to the static iron core portion 113. The spring 150 is disposed between the valve cover 110 and the moving iron core 140, and one end abuts against the moving iron core 140 and the other end abuts against the valve cover 110, and is configured to provide an elastic force to the moving iron core 140 away from the static iron core portion 113. The coil assembly 170 is disposed on the outer periphery of the outer sleeve 130 and is configured to generate an electromagnetic force on the moving iron core 140 by the static iron core portion 113 when energized. In the case where the coil assembly 170 is de-energized, the elastic force of the spring 150 can move the moving iron core 140 away from the static iron core. In the case where the coil assembly 170 is energized, the electromagnetic force provided by the coil assembly 170 can overcome the elastic force of the spring 150 to move the moving iron core 140 toward the static iron core.

[0056] In this embodiment, by installing the moving iron core 140 and the spring 150 in the installation space formed by the valve seat 314 and the outer sleeve 130, and installing the coil assembly 170 on the outer sleeve 130, the modularization of the electromagnetic assembly is realized. The modular electromagnetic assembly can be applied to a direct-acting solenoid valve 300 and a pilot-operated solenoid valve 500, thereby facilitating assembly and improving assembly efficiency. Secondly, the modular electromagnetic assembly has a simple structure, fewer parts, and lower costs.

[0057] Generally, the end of the outer sleeve 130 is connected to the valve cover 110 by welding. And the end of the through hole 111 and the moving iron core 140 protrude out or other components of the solenoid valve extend in.

[0058] Please refer to Figure 1 In this embodiment, an abutting ring platform 115 is provided on the side wall of the through hole 111. One end of the spring 150 is inserted into the through hole 111 and abuts against the abutting ring platform 115.

[0059] In this embodiment, the abutting ring platform 115 is provided on the side wall of the through hole 111, and the bottom end of the spring 150 can be inserted into the through hole 111, so that the spring 150 can be prevented from being bent. At the same time, the assembly of the spring 150 can be facilitated.

[0060] Furthermore, the bottom surface of the abutting ring platform is flush with the bottom surface of the valve cover. In this way, both the insertion depth can be increased and the thickness of the valve cover 110 is not affected.

[0061] In this embodiment, the moving iron core 140 includes a first section 141 and a second section 142 which are connected to each other, and the first section 141 and the second section 142 are integrally formed. Among them, the diameter of the second section 142 is larger than that of the first section 141, and the diameter of the first section 141 is smaller than the diameter of the through hole 111. The second section 142 is installed in the outer sleeve 130, and a part of the first section 141 is inserted into the inner cavity of the static iron core part 113. The spring 150 is partially sleeved on the outer peripheral edge of the first section 141, and one end of the spring 150 away from the valve cover 110 abuts against the end surface of the second section 142 close to the first section 141.

[0062] Please refer to Figure 1 In this embodiment, by setting the moving iron core 140 into two ends, the upper end of the spring 150 can be sleeved on the outer peripheral edge of the first section 141 and can abut against the end surface of the second section 142, improving the installation stability. Let a part of the first section 141 be inserted into the cavity 131 (i.e., the through hole 111) inside the moving iron core 140, so that the spring 150 can be prevented from being bent and getting stuck.

[0063] In this embodiment, a stepped ring groove 143 is provided on one side of the second section 142 close to the first section 141, and the side wall of the stepped ring groove 143 is inclined towards the center of the moving iron core 140 to form a conical surface 144. A chamfer 117 is provided on the inner peripheral edge of the end plate of the static iron core part 113, and the chamfer 117 corresponds to the conical surface 144.

[0064] In this embodiment, a stepped ring groove 143 is provided at the end of the second section 142, and the side wall of the stepped ring groove 143 is set as an inclined conical surface corresponding to the chamfer 117 of the static iron core part 113. In this way, the effective corresponding area between the static iron core part 113 and the moving iron core 140 can be increased, thereby increasing the electromagnetic force to drive the moving iron core 140 to move downward.

[0065] In this embodiment, a weight reduction cavity 145 is provided in the second section 142, and the weight reduction cavity 145 penetrates through one end of the second section 142 away from the first section 141.

[0066] Please refer to Figure 1 , in this embodiment, a weight reduction cavity 145 is provided, which can reduce the mass of the moving iron core 140, thereby improving the response sensitivity.

[0067] In this embodiment, a balance cavity 146 is axially provided in the first section 141. One end of the balance cavity 146 is communicated with the weight reduction cavity 145. The first section 141 is provided with a lateral flow channel 147 along the radial direction, and the lateral flow channel 147 is communicated with the balance cavity 146.

[0068] In this embodiment, the balance cavity 146 and the lateral flow channel 147 are provided in the first section 141, which can balance the pressures at both ends and facilitate the movement of the moving iron core 140.

[0069] In this embodiment, the electromagnetic assembly further includes a seal 180. A clamping groove 148 is provided at the end of the first section 141. The seal 180 is installed in the clamping groove 148. A communication hole 111 is provided in the bottom wall of the clamping groove 148, and the communication hole 111 is communicated with the balance cavity 146.

[0070] Please refer to Figure 1 , in this embodiment, better sealing can be achieved by providing the seal 180. Before the seal 180 is installed, the installation groove is a stepped groove, and the side wall at the end is thinner. After the seal 180 is installed in the installation groove, a flanging 149 is formed at the periphery of the outer end of the seal 180 through a spinning process, and the seal 180 is fixed in the installation groove. Of course, in some other embodiments of the present application, the seal 180 can also be directly injection-molded in the installation groove. In order to improve the bonding strength, a fitting boss can be provided on the side wall of the installation groove, and the fitting boss can be fitted in the seal 180 after the injection molding.

[0071] In summary, the modular electromagnetic assembly 100 provided in this embodiment realizes the modularization of the electromagnetic assembly by installing the moving iron core 140 and the spring 150 in the installation space formed by the valve seat 314 and the outer sleeve 130, and installing the coil assembly 170 on the outer sleeve 130. This modular electromagnetic assembly can be applied to the direct-acting solenoid valve 300 and the pilot-operated solenoid valve 500, which can facilitate assembly and improve the assembly efficiency. Secondly, this modular electromagnetic assembly has a simple structure, fewer parts, and lower costs.

[0072] Embodiment 2

[0073] Please refer to Figure 2 , this embodiment provides a direct-acting solenoid valve 300, which is an application of the modular electromagnetic assembly 100 provided in Embodiment 1. The structure of the modular electromagnetic assembly 100 is the same as that in Embodiment 1.

[0074] Please refer to Figure 2, The direct-acting solenoid valve 300 includes a valve body 310 and the electromagnetic assembly of Embodiment 1. The valve body 310 is provided with a first opening 311 and a second opening 313. The first opening 311 is arranged axially on the valve body, and the second opening 313 is arranged on the side wall of the valve body 310. Among them, one of the first opening 311 and the second opening 313 is an inlet and the other is an outlet. Generally, the second opening 313 can be selected as the inlet. A valve seat 314 protrudes at a position corresponding to the first opening 311 inside the valve body 310. The valve cover 110 is installed on the valve body 310, and a part of the valve seat 314 extends into the through hole 111. A flow passage 315 is formed between the valve seat 314 and the side wall of the through hole. After the coil assembly 170 is energized, the moving iron core 140 moves downward, so that the seal 180 at the end of the moving iron core 140 abuts and seals against the top of the valve seat 314 to block the communication between the first opening 311 and the second opening 313. When the coil assembly 170 is de-energized, the moving iron core 140 moves upward under the action of the spring 150, so that the first opening 311 and the second opening 313 are communicated through the flow passage 315.

[0075] It should be noted that the assembly between the valve cover 110 and the valve body 310 can be assembled by screw fitting or fixed by welding.

[0076] The direct-acting solenoid valve 300 provided in this embodiment has a simple structure, and the assembly process is simpler by pre-assembling the modular electromagnetic assembly 100 first and then performing the general assembly. Especially when the valve cover 110 and the valve body 310 are fixed by welding, the assembly is more convenient.

[0077] Embodiment 3

[0078] Please refer to Figure 3 , This embodiment provides a pilot-operated solenoid valve 500, which is another application of the modular electromagnetic assembly 100 provided in Embodiment 1. The structure of the modular electromagnetic assembly 100 is the same as that in Embodiment 1.

[0079] The pilot-operated solenoid valve 500 includes a pilot valve body 510, a valve plug 530, a valve plug spring 550, and the modular electromagnetic assembly 100 of Embodiment 1. The pilot valve body 510 has a specific inlet 511 and an outlet 513. The outlet 513 is arranged axially on the pilot valve body 510, and the inlet 511 is arranged on the side wall of the pilot valve body 510. The valve cover 110 is installed on the pilot valve body 510. The valve plug 530 is movably installed in the pilot valve body 510 and can move towards the valve cover 110. The valve plug 530 has a pilot hole 531. A contact seat 533 is provided corresponding to the pilot hole 531 at the top end of the valve plug 530, and the end of the contact seat 533 is inserted into the through hole 111. The valve plug spring 550 is configured to provide an elastic force to the valve plug 530 in the direction towards the valve cover 110. When the coil assembly 170 is energized, the moving iron core 140 can move downward under the action of the electromagnetic force, and can drive the valve plug 530 to move downward after abutting against the contact seat 533, so that the valve plug 530 closes the outlet 513. When the coil is de-energized, the moving iron core 140 can move upward under the elastic force of the spring 150, so that the pilot hole 531 is opened, and the valve plug 530 can be lifted under the action of the pressure difference force and the valve plug spring 550, so that the inlet 511 and the outlet 513 are communicated.

[0080] It should be noted that the assembly between the valve cover 110 and the pilot valve body 510 can be assembled by screw fit or fixed by welding.

[0081] Please refer to Figure 3 , the pilot-operated solenoid valve 500 provided in this embodiment has a simple structure, and can be pre-assembled for the modular electromagnetic assembly 100 first and then assembled as a whole, and the assembly process is simpler. Especially when the pilot valve body 510 and the valve cover 110 are fixed by welding, the assembly is more convenient.

[0082] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A modular electromagnetic assembly, applied to a normally open electromagnetic valve, characterized in that: The electromagnetic assembly comprises: A valve cover (110) is configured to be installed on the valve body (310) of the normally open solenoid valve, wherein the valve cover (110) is provided with a through hole (111), and one side of the valve cover (110) is formed with a static iron core portion (113) protruding outward from the outer periphery of the through hole (111); An outer sleeve (130) has a cavity (131) with an opening at one end, the outer sleeve (130) is inserted into the outer periphery of the static iron core through the opening of the cavity (131), and is fixedly connected to the valve cover (110); A moving iron core (140), the moving iron core (140) being movably installed in the cavity (131) and corresponding to the stationary iron core portion (113); a spring (150) disposed between the valve cover (110) and the moving iron core (140), with one end abutting against the moving iron core (140) and the other end abutting against the valve cover (110), and configured to provide an elastic force to the moving iron core (140) away from the static iron core portion (113); and The coil assembly (170) is arranged on the outer periphery of the outer sleeve (130) and is configured such that when power is supplied, the static iron core (113) generates electromagnetic force on the moving iron core (140); When the coil assembly (170) is powered off, the elastic force of the spring (150) can cause the moving iron core (140) to move in a direction away from the stationary iron core; When the coil assembly (170) is energized, the electromagnetic force provided by the coil assembly (170) can overcome the elastic force of the spring (150), so that the moving iron core (140) moves in the direction of the stationary iron core.

2. The modular electromagnetic assembly according to claim 1, characterized in that: A contact ring (115) is provided on the side wall of the through hole (111), and one end of the spring (150) is inserted into the through hole (111) and contacts the contact ring (115).

3. The modular electromagnetic assembly according to claim 1, characterized in that: The outer sleeve (130) is inserted into the static iron core (113).

4. The modular electromagnetic assembly according to any one of claims 1 to 3, characterized in that: The moving iron core (140) comprises a first section (141) and a second section (142) connected to each other, and the first section (141) and the second section (142) are integrally formed; The diameter of the second section (142) is greater than the diameter of the first section (141), and the diameter of the first section (141) is smaller than the diameter of the through hole (111); the second section (142) is installed in the outer sleeve (130), and the first section (141) is partially inserted into the inner cavity of the static iron core (113); The spring (150) is partially sleeved on the outer periphery of the first section (141), and one end of the spring (150) away from the valve cover (110) abuts against an end surface of the second section (142) close to the first section (141).

5. The modular electromagnetic assembly according to claim 4, characterized in that: A step ring groove (143) is provided on one side of the second section (142) close to the first section (141), and a side wall of the step ring groove (143) is inclined toward the center of the moving iron core (140) to form a conical surface (144); The inner peripheral edge of the end plate of the static iron core (113) is provided with a chamfer (117), and the chamfer (117) corresponds to the conical surface (144).

6. The modular electromagnetic assembly according to claim 4, characterized in that: The second section (142) is provided with a weight-reducing cavity (145), and the weight-reducing cavity (145) runs through an end of the second section (142) away from the first section (141).

7. The modular electromagnetic assembly according to claim 6, characterized in that: The first section (141) is provided with a balancing chamber (146) in the axial direction, one end of the balancing chamber (146) is communicated with the weight reduction chamber (145), and the first section (141) is provided with a side flow channel (147) in the radial direction, and the side flow channel (147) is communicated with the balancing chamber (146).

8. The modular electromagnetic assembly according to claim 7, characterized in that: The electromagnetic assembly also includes a sealing member (180); A snap-fit ​​groove (148) is provided at the end of the first section (141), the sealing member (180) is installed in the snap-fit ​​groove (148), and a connecting hole (111) is provided on the bottom wall of the snap-fit ​​groove (148), and the connecting hole (111) is connected to the balancing chamber (146).

9. A direct-acting solenoid valve, characterized in that: A valve body (310) and a modular electromagnetic assembly as claimed in any one of claims 1 to 8, wherein the valve body (310) is provided with a first opening (311) and a second opening (313), the first opening (311) being provided in the axial direction of the valve body (310), and the second opening (313) being provided on the side wall of the valve body (310); A valve seat (314) is protrudingly provided in the valve body (310) at a position corresponding to the first opening (311); The valve cover (110) is mounted on the valve body (310), and the valve seat (314) partially extends into the through hole (111), and a flow channel (315) is formed between the valve seat (314) and a side wall of the through hole (111); After the coil assembly (170) is energized, the moving iron core (140) moves downward so that the sealing member (180) at the end of the moving iron core (140) abuts against and seals the top end of the valve seat (314), thereby blocking the communication between the first opening (311) and the second opening (313); When the coil assembly (170) is powered off, the moving iron core (140) moves upward under the action of the spring (150), so that the first opening (311) and the second opening (313) are connected through the flow channel (315).

10. A pilot-operated solenoid valve, characterized in that: A modular electromagnetic assembly comprising a pilot valve body (510), a valve plug (530), a valve plug spring (550) and any one of claims 1 to 8; The pilot valve body (510) specifically includes an inlet (511) and an outlet (513), wherein the outlet (513) is arranged in the axial direction of the pilot valve body (510), and the inlet (511) is arranged on the side wall of the pilot valve body (510); The valve cover (110) is mounted on the pilot valve body (510); The valve plug (530) is movably installed in the pilot valve body (510) and is movable toward the valve cover (110); The valve plug (530) has a pilot hole (531), and a top end of the valve plug (530) is provided with an abutment seat (533) corresponding to the pilot hole (531), and an end of the abutment seat (533) is inserted into the through hole (111); The valve plug spring (550) is configured to provide an elastic force to the valve plug (530) in a direction toward the valve cover (110); When the coil assembly (170) is energized, the moving iron core (140) can move downward under the action of electromagnetic force, and after abutting against the abutment seat (533), it can drive the valve plug (530) to move downward, so that the valve plug (530) closes the outlet (513); When the coil assembly (170) is powered off, the moving iron core (140) can move upward under the action of the elastic force of the spring (150) to open the pilot hole (531), and the valve plug (530) can be lifted under the action of the pressure difference force and the valve plug spring (550) to connect the inlet (511) and the outlet (513).

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