Movable iron core assembly and electromagnetic valve

Abstract

The utility model provides a movable iron core assembly and an electromagnetic valve, and relates to the field of valves. The movable iron core assembly comprises a movable iron core, a movable valve body, a sealing piece and a spring. A mounting groove is formed in one end of the movable iron core in the axial direction of the movable iron core. The movable valve is movably mounted in the mounting groove. The sealing piece is installed on the side, close to an opening of the installation groove, of the movable valve body. The mounting groove is provided with an abutting portion, the spring is mounted in the mounting groove, one end of the spring abuts against the abutting portion, the other end of the spring abuts against the movable valve, and the spring is used for providing elastic force towards the bottom wall of the mounting groove for the movable valve. Under the condition that the valve opening capacity is improved, the modularization degree is high, and assembling is convenient.

Description

Technical Field

[0001] The utility model relates to the field of valves, and more particularly, to a moving iron core assembly and a solenoid valve. Background Art

[0002] A solenoid valve is an industrial device controlled by electromagnetism. It is a basic automation component used to control fluids and belongs to an actuator. It is used in industrial control systems to adjust parameters such as the direction, flow rate, speed, and other parameters of the medium.

[0003] In the existing normally closed solenoid, when in the valve - closed state, the distance between the moving iron core and the static iron core is relatively far, and the electromagnetic force is small, resulting in a weak valve - opening ability of the solenoid valve. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a moving iron core assembly and a solenoid valve, which can be used for a sealed moving valve that can move relative to the moving iron core. In this way, when opening the valve, after the moving iron core moves a certain distance relative to the moving valve body, the distance between the moving iron core and the static iron core is reduced, increasing the electromagnetic force between the moving iron core and the static iron core, and then driving the moving valve to move together to open the solenoid valve, thereby improving the valve - opening ability of the solenoid valve.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a moving iron core assembly for use in a solenoid valve, comprising a moving iron core, a moving valve body, a sealing member, and a spring;

[0007] An installation groove is arranged at one end of the moving iron core along the axial direction of the moving iron core;

[0008] The moving valve is movably installed in the installation groove;

[0009] The sealing member is installed on one side of the moving valve body close to the opening of the installation groove;

[0010] The installation groove is provided with an abutting portion, the spring is installed in the installation groove, and one end of the spring abuts against the abutting portion, and the other end of the spring abuts against the moving valve. The spring is used to provide an elastic force to the moving valve towards the bottom wall of the installation groove.

[0011] In an alternative embodiment, the moving iron core comprises an iron core body and an abutting member;

[0012] The installation groove is arranged at one end of the iron core body;

[0013] An installation ring groove is arranged at one end of the iron core body close to the opening of the installation groove;

[0014] The abutting member is installed in the installation ring groove, and the abutting portion is arranged on the abutting member;

[0015] The abutting member is provided with a hollow area corresponding to the seal member.

[0016] In an alternative embodiment, the abutting member is provided with balance holes in its thickness direction.

[0017] In an alternative embodiment, the movable valve body includes a valve body and a clamping member;

[0018] The valve body is provided with an assembly groove;

[0019] A clamping groove is provided at a position of the assembly groove close to the opening;

[0020] The seal member is installed in the assembly groove, and the clamping member is assembled in the clamping groove and abuts against the seal member;

[0021] The clamping member is provided with an external leakage hole through which part of the seal member can leak out;

[0022] The spring abuts against the valve body.

[0023] In an alternative embodiment, a sleeved ring platform is provided on a side of the clamping member away from the seal member, and the spring is sleeved on the sleeved ring platform.

[0024] In an alternative embodiment, the valve body is made of metal and covers the side wall and the top wall of the seal member.

[0025] In an alternative embodiment, the movable valve body is provided with balance flow channels along its axial direction and / or the side wall of the installation groove.

[0026] In an alternative embodiment, balance channels are provided along the axial direction of the moving iron core on the periphery of the moving iron core.

[0027] In an alternative embodiment, an abutting boss is provided at one end of the moving iron core close to the installation groove.

[0028] In a second aspect, the present invention provides a solenoid valve, including a valve body assembly, a coil, the moving iron core assembly according to any one of the foregoing embodiments, and a valve closing spring;

[0029] The valve body assembly is provided with an outlet and an inlet;

[0030] The outlet is formed in the axial direction of the valve body assembly, and a valve seat protruding towards the top is provided on the periphery of the outlet;

[0031] The coil is installed on the valve body assembly;

[0032] The movable iron core is movably installed within the valve body assembly, and the seal is in contact with the valve seat;

[0033] A closing valve spring configured to apply an elastic force to the movable iron core in the direction towards the valve seat;

[0034] When the coil is de-energized, the closing valve spring can move the movable iron core so that the valve seat is inserted into the installation groove and abuts against the seal for sealing;

[0035] In the first stage when the coil is energized, the electromagnetic force can move the movable iron core upward relative to the movable valve and make the movable valve abut against the abutting portion;

[0036] In the second stage when the coil is energized, the electromagnetic force can move the movable iron core upward together with the movable valve so that the seal is separated from the valve seat, thereby connecting the inlet and the outlet.

[0037] In the third stage when the coil is energized, the electromagnetic force can move the movable iron core to the topmost position, and the spring can move the movable valve body relative to the movable iron core.

[0038] The beneficial effects of the movable iron core assembly and the solenoid valve provided by the embodiments of the present utility model are:

[0039] In this application, the iron core assembly is set as two parts, the seal is installed on the movable valve, and the movable valve is movably installed in the installation groove of the movable iron core. An abutting portion is provided in the installation groove, and a spring is provided. When the coil is de-energized, the closing valve spring can move the movable iron core so that the valve seat is inserted into the installation groove and abuts against the seal for sealing. In the first stage when the coil is energized, the electromagnetic force can move the movable iron core upward relative to the movable valve and make the movable valve abut against the abutting portion. That is, in this stage, it is equivalent to the iron core assembly stretching, and the electromagnetic force only needs to overcome the spring force of the closing valve spring. In the second stage when the coil is energized, the distance between the movable iron core and the static iron core decreases and the electromagnetic force increases. The electromagnetic force can move the movable iron core upward together with the movable valve so that the seal is separated from the valve seat, thereby connecting the inlet and the outlet, thus improving the valve opening ability of the solenoid valve. In the third stage when the coil is energized, the electromagnetic force can move the movable iron core to the topmost position, and the spring can move the movable valve body relative to the movable iron core, which can increase the flow area between the inlet and the outlet, thereby facilitating the flow of more media. Description of the Drawings

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant accompanying drawings can also be obtained based on these drawings.

[0041] Figure 1 Structural schematic diagram of the solenoid valve provided by the embodiment of the present invention;

[0042] Figure 2 Cross-sectional structural schematic diagram of the solenoid valve provided by the embodiment of the present invention, which is a pilot-operated solenoid valve;

[0043] Figure 3 Cross-sectional structural schematic diagram of the moving iron core assembly provided by the embodiment of the present invention;

[0044] Figure 4 Another cross-sectional structural schematic diagram of the moving iron core assembly provided by the embodiment of the present invention;

[0045] Figure 5 Structural schematic diagram of the valve body of the moving valve of the moving iron core assembly provided by the embodiment of the present invention;

[0046] Figure 6 Structural schematic diagram of the clamping member of the moving iron core assembly provided by the embodiment of the present invention;

[0047] Figure 7 Cross-sectional structural schematic diagram of the solenoid valve provided by the embodiment of the present invention, which is a direct-flow solenoid valve;

[0048] Figure 8 Position schematic diagram of the moving iron core assembly of the solenoid valve provided by the embodiment of the present invention in the first stage of energization;

[0049] Figure 9 Position schematic diagram of the moving iron core assembly of the solenoid valve provided by the embodiment of the present invention in the second stage of energization;

[0050] Figure 10 Position schematic diagram of the moving iron core assembly of the solenoid valve provided by the embodiment of the present invention in the third stage of energization.

[0051] Icons: 100 - moving iron core assembly; 110 - moving iron core; 111 - mounting groove; 113 - abutting portion; 115 - iron core body; 117 - abutting member; 119 - mounting ring groove; 121 - hollow area; 122 - balance channel; 123 - balance hole; 124 - abutting boss; 130 - moving valve; 131 - valve body; 133 - clamping member; 135 - assembly groove; 137 - clamping groove; 139 - sleeved ring platform; 141 - balance flow channel; 150 - seal; 170 - spring; 300 - solenoid valve; 310 - valve body assembly; 311 - outlet; 312 - inlet; 313 - valve seat; 314 - valve body; 315 - valve plug; 316 - cover body; 317 - sleeve; 318 - static iron core; 319 - first outlet; 321 - second outlet; 322 - through hole; 323 - valve plug spring; 324 - flow channel; 351 - coil; 353 - valve closing spring. Detailed implementation manners

[0052] 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. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying 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.

[0054] It should be noted that: similar reference numerals and letters denote 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.

[0055] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed when in 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 thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0056] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, 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.

[0057] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" 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 components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0058] Embodiment

[0059] Please refer to Figure 1 , this embodiment provides a solenoid valve 300. By making special settings for the moving iron core assembly 100, the valve opening ability of the solenoid valve 300 can be increased.

[0060] Please refer to Figure 1 and Figure 7 , in this embodiment, the solenoid valve 300 includes a valve body assembly 310, a coil 351, a closing valve spring 353, and a moving iron core assembly 100. The valve body assembly 310 is provided with an outlet 311 and an inlet 312. The outlet 311 is formed in the axial direction of the valve body assembly 310, and a valve seat 313 protruding towards the top is provided on the periphery of the outlet 311. The coil 351 is installed on the valve body assembly 310. The moving iron core assembly 100 is movably installed inside the valve body assembly 310. The closing valve spring 353 is configured to apply an elastic force towards the opening direction to the moving iron core assembly 100. When the coil 351 is powered off, the closing valve spring 353 can move the moving iron core assembly 100, thereby realizing valve closing.

[0061] Please refer to Figure 1 and Figure 2, in an embodiment of the present application, the solenoid valve 300 is a pilot-operated solenoid valve 300. The valve body assembly 310 includes a valve body 314, a valve plug 315, a cover body 316, a sleeve 317, and a stationary iron core 318. The outlet 311 includes a first outlet 319 and a second outlet 321. The first outlet 319 is provided at the bottom end of the valve body 314, and the inlet 312 is provided on the side wall of the valve body 314. The valve plug 315 is movably disposed within the valve body 314. The second outlet 321 is provided in the valve plug 315 and penetrates through the valve plug 315. The second outlet 321 is the pilot hole of the valve plug 315. A valve seat 313 is provided on the periphery of the second outlet 321 and protrudes toward the top of the valve plug 315. The valve plug 315 is provided with a flow passage 324 that communicates the inlet 312 with the chamber at the top of the valve plug 315 when the valve plug 315 is closed, so that a high-pressure area is formed at the top of the valve plug 315. The cover body 316 is mounted on the valve body 131, and the cover body 316 is provided with a through hole 322. The sleeve 317 is mounted on the cover body 316. The stationary iron core 318 is fixedly provided at the top end of the sleeve 317. The top end of the moving iron core assembly 100 is inserted into the sleeve through the through hole 322 and faces the stationary iron core 318. A valve plug spring 323 is further provided between the valve plug 315 and the valve body. The valve plug spring 323 is used to provide an upward elastic force to the valve plug 315. And the bottom end of the moving iron core assembly 100 corresponds to the second outlet 321 (i.e., the pilot hole) of the valve plug 315. The coil 351 is mounted on the outside of the sleeve. When the moving iron core assembly 100 moves upward under the action of electromagnetic force, the second outlet 321 can be communicated with the inlet 312, and the first outlet 319 and the second outlet 321 are always communicated, so that the chamber at the top of the valve plug 315 is depressurized, and the valve plug 315 is lifted under the action of the pressure difference force and the valve plug spring 323, so that the inlet 312 and the first outlet 319 can be directly communicated.

[0062] Please refer to Figure 7 , in some other embodiments of the present application, the solenoid valve 300 may also be a direct-acting solenoid valve 300. The valve body assembly 310 includes a valve body 314, a cover body 316, a sleeve 317, and a stationary iron core 318. The valve plug 315 is cancelled relative to the pilot-operated solenoid valve 300. The outlet 311 is provided axially on the valve body 314, the valve seat 313 protrudes corresponding to the outlet 311, and the inlet 312 is provided on the side wall of the valve body 131. The cover body 316 is provided with a through hole 322. The sleeve 317 is mounted on the cover body 316. The stationary iron core 318 is fixedly provided at the top end of the sleeve 317. The top end of the moving iron core assembly 100 is inserted into the sleeve 317 through the through hole 322 and faces the stationary iron core 318. The coil 351 is mounted on the outside of the sleeve 317. By moving the moving iron core assembly 100, the inlet 312 and the outlet 311 can be directly communicated.

[0063] In the prior art, a gasket is generally fixedly arranged at the bottom end of the moving iron core. In this way, at the initial stage of valve opening, the electromagnetic force needs to overcome the elastic force of the closing valve spring and the pressure difference force at both ends of the moving iron core assembly to open the valve. At the initial stage of valve opening, the distance between the moving iron core assembly and the static iron core 318 is relatively far, and the electromagnetic force is small, which results in a weak valve opening ability.

[0064] Please refer to Figures 1 to 7 , in this embodiment, the moving iron core assembly 100 includes a moving iron core 110, a moving valve 130, a sealing member 150, and a spring 170. An installation groove 111 is arranged along the axial direction of one end of the moving iron core 110. The moving valve 130 is movably installed in the installation groove 111. The sealing member 150 is installed on one side of the moving valve 130 body close to the opening of the installation groove 111. The installation groove 111 is provided with an abutting portion 113. The spring 170 is installed in the installation groove 111, and one end of the spring 170 abuts against the abutting portion 113, and the other end of the spring 170 abuts against the moving valve 130. The spring 170 is used to provide an elastic force for the moving valve 130 towards the bottom wall of the installation groove 111.

[0065] In this embodiment, by setting the structure of the moving iron core assembly 100 as described above, please refer to Figure 2 , when the coil 351 is powered off, the closing valve spring 353 can move the moving iron core 110 so that the valve seat 313 is inserted into the installation groove 111 and abuts against the sealing member 150 to achieve valve closing. Please refer to Figure 8 , in the first stage when the coil 351 is powered on, the electromagnetic force can move the moving iron core 110 upward relative to the moving valve 130. In this stage, due to a large pressure difference at both ends of the moving valve 130, when the moving iron core 110 moves upward, it will not move upward with the moving iron core 110, but only the moving iron core 110 moves upward. In this stage, the moving valve 130 abuts against the abutting portion 113, so that the distance between the top end of the moving iron core 110 and the static iron core 318 becomes smaller. Please refer to Figure 9 , in the second stage when the coil 351 is powered on, since the moving valve 130 abuts against the abutting portion 113 and the distance between the moving iron core 110 and the static iron core 318 becomes smaller, the increased electromagnetic force can make the moving iron core 110 move upward with the moving valve 130 during the lifting process so that the sealing member 150 is separated from the valve seat 313, and the inlet 312 is communicated with the outlet 311. Please refer to Figure 10 , in the third stage when the coil 351 is powered on, the electromagnetic force can move the moving iron core 110 to the topmost position, and the spring 170 can make the moving valve 130 move relative to the moving iron core 110 to the topmost position of the installation groove 111.

[0066] In this embodiment, the iron core assembly is set as two parts, the seal 150 is installed on the moving valve 130, and then the moving valve 130 is movably installed in the installation groove 111 of the moving iron core 110. An abutting portion 113 is provided in the installation groove 111, and a spring 170 is provided. When the coil 351 is de-energized, the closing valve spring 353 can move the moving iron core 110, so that the valve seat 313 is inserted into the installation groove 111 and abuts against the seal 150 for sealing. In the first stage when the coil 351 is energized, the electromagnetic force can move the moving iron core 110 upward relative to the moving valve 130 and make the moving valve 130 abut against the abutting portion 113. That is, in this stage, it is equivalent to the elongation of the iron core assembly, and the electromagnetic force only needs to overcome the spring force of the closing valve spring 353. In the second stage when the coil 351 is energized, the distance between the moving iron core 110 and the static iron core 318 is reduced and the electromagnetic force increases. The electromagnetic force can move the moving iron core 110 upward together with the moving valve 130 to separate the seal 150 from the valve seat 313, and to connect the inlet 312 and the outlet 311, thereby improving the valve opening ability of the solenoid valve 300. In the third stage when the coil 351 is energized, the electromagnetic force can move the moving iron core 110 to the topmost position, and the spring 170 can move the moving valve 130 body relative to the moving iron core 110, which can increase the flow area between the inlet 312 and the outlet 311, thus facilitating the flow of more media. Most importantly, the formed moving iron core assembly 100 has a high integration degree, is convenient for assembly, and can improve the stability of use.

[0067] Please refer to Figures 3 to 6 , in this embodiment, the moving iron core 110 includes an iron core body 115 and an abutting member 117. The installation groove 111 is provided at one end of the iron core body 115. An installation ring groove 119 is provided at one end of the iron core body 115 close to the opening of the installation groove 111. The abutting member 117 is installed in the installation ring groove 119, and the abutting portion 113 is provided on the abutting member 117. The abutting member 117 is provided with a hollow area 121, and the hollow area 121 corresponds to the seal 150.

[0068] In this embodiment, the moving iron core 110 is set as two parts, which is convenient for limiting the moving valve 130 in the installation groove 111, so that the moving valve 130 can move axially along the installation groove 111 within a certain range in the installation groove 111, thus facilitating assembly and manufacturing.

[0069] In this embodiment, the structure of the abutting member 117 is annular and is installed in the installation ring groove 119. The specific installation can adopt a spinning process to form an inward flanging at the end of the moving iron core 110 to fix the abutting member 117. Of course, in some other embodiments of the present application, the abutting member 117 can also be fixed to the moving iron core 110 by processes such as welding.

[0070] Please refer to Figures 3 to 6, in this embodiment, the abutting member 117 is provided with a balance hole 123 along its thickness direction. This balance hole 123 can balance the pressure of the medium during the movement of the moving valve 130.

[0071] In this embodiment, the moving valve 130 body includes a valve body 131 and a clamping member 133. The valve body 131 is provided with an assembly groove 135. A clamping groove 137 is provided at a position close to the opening of the assembly groove 135. The sealing member 150 is installed in the assembly groove 135, the clamping member 133 is assembled in the clamping groove 137, and abuts against the sealing member 150. The clamping member 133 is provided with an external leakage hole, and the external leakage hole can cause partial external leakage of the sealing member 150. The spring 170 abuts against the valve body 131.

[0072] Through the above structural settings in this embodiment, the fixing of the sealing member 150 can be conveniently achieved and the assembly is facilitated. The sealing member 150 is generally made of materials such as rubber blocks or polytetrafluoroethylene, and the valve body 131 can wrap it for easy movement and to avoid non-preset deformation.

[0073] It should be noted that the formation of the clamping groove 137 is also formed by a spinning process. Of course, in some other embodiments of the present application, the sealing member 150 can also be provided in the valve body 131 by an integral injection molding method.

[0074] Please refer to Figures 3 to 6 , in this embodiment, a sleeved ring platform 139 is provided on a side of the clamping member 133 away from the sealing member 150, and the spring 170 is sleeved on the sleeved ring platform 139.

[0075] By providing the sleeved ring platform 139 in this embodiment, the stable installation of the spring 170 can be achieved.

[0076] In this embodiment, the valve body 131 is made of metal and covers the side wall and the top wall of the sealing member 150.

[0077] In this embodiment, the valve body 131 is made of metal, so that it can not only cover the sealing member 150 but also slide better relative to the side wall of the installation groove 111.

[0078] In this embodiment, the moving valve 130 body is provided with a balance flow channel 141 along its axial direction and / or the side wall of the installation groove 111.

[0079] By providing the balance flow channel 141 in this embodiment, the pressure on both sides of the moving valve 130 can be balanced during the movement of the moving valve 130.

[0080] Please refer to Figures 3 to 6, in this embodiment, a balance channel 122 is provided along the axial direction of the moving iron core 110 at the periphery of the moving iron core 110. The balance channel 122 can balance the pressures at both ends of the moving iron core 110 during the upward movement of the moving iron core 110.

[0081] In this embodiment, an abutting boss 124 is provided at one end of the moving iron core 110 close to the mounting groove 111. The abutting boss 124 is used for mounting the valve closing spring 353.

[0082] Specifically, the valve closing spring 353 is sleeved on the moving iron core 110, and the bottom end of the valve closing spring 353 abuts against the abutting boss 124, while the top end of the valve closing spring 353 abuts against the cover body 316. This facilitates the installation of the valve closing spring 353 and can avoid the problem that the valve closing spring 353 is bent during the lifting process of the moving iron core 110.

[0083] In summary, the working principles and beneficial effects of the moving iron core assembly 100 and the solenoid valve 300 provided in this embodiment include:

[0084] In this embodiment, the iron core assembly is set as two parts. The seal 150 is installed on the moving valve 130, and then the moving valve 130 is movably installed in the mounting groove 111 of the moving iron core 110. An abutting portion 113 is provided in the mounting groove 111, and a spring 170 is provided. When the coil 351 is de-energized, the valve closing spring 353 can move the moving iron core 110 so that the valve seat 313 is inserted into the mounting groove 111 and abuts against the seal 150 for sealing. In the first stage when the coil 351 is energized, the electromagnetic force can move the moving iron core 110 upward relative to the moving valve 130 and make the moving valve 130 abut against the abutting portion 113. That is, in this stage, it is equivalent to the elongation of the iron core assembly, and the electromagnetic force only needs to overcome the spring force of the valve closing spring 353. In the second stage when the coil 351 is energized, the distance between the moving iron core 110 and the static iron core 318 is reduced and the electromagnetic force increases. The electromagnetic force can move the moving iron core 110 together with the moving valve 130 upward so that the seal 150 is separated from the valve seat 313, and the inlet 312 is communicated with the outlet 311, thereby improving the valve opening ability of the solenoid valve 300. In the third stage when the coil 351 is energized, the electromagnetic force can move the moving iron core 110 to the topmost position, and the spring 170 can move the moving valve 130 body relative to the moving iron core 110, which can increase the flow area between the inlet 312 and the outlet 311, thus facilitating the flow of more media.

[0085] The above is only the preferred embodiment of the present invention and is 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 in the protection scope of the present invention.

Claims

1. A moving iron core assembly, applied to a solenoid valve (300), characterized in that: It includes a moving iron core (110), a movable valve (130), a sealing element (150) and a spring (170); One end of the moving iron core (110) is provided with a mounting groove (111) along the axial direction of the moving iron core (110); The movable valve (130) is movably mounted on the mounting groove (111); The sealing member (150) is installed on a side of the movable valve (130) body close to the opening of the installation groove (111); The mounting groove (111) is provided with an abutment portion (113), the spring (170) is mounted on the mounting groove (111), and one end of the spring (170) abuts against the abutment portion (113), and the other end of the spring (170) abuts against the movable valve (130), and the spring (170) is used to provide the movable valve (130) with an elastic force toward the bottom wall of the mounting groove (111).

2. The moving iron core assembly according to claim 1, characterized in that: The moving iron core (110) comprises an iron core body (115) and an abutment member (117); The mounting groove (111) is arranged at one end of the core body (115); An installation ring groove (119) is provided at one end of the core body close to the opening of the installation groove (111); The abutment member (117) is installed in the installation ring groove, and the abutment portion (113) is arranged on the abutment member (117); The abutment member (117) is provided with a hollow area (121), and the hollow area (121) corresponds to the sealing member (150).

3. The moving iron core assembly according to claim 2, characterized in that: The abutment member (117) is provided with a balancing hole (123) along its thickness direction.

4. The moving iron core assembly according to any one of claims 1 to 3, characterized in that: The movable valve (130) comprises a valve body (131) and a clamping member (133); The valve body (131) is provided with a mounting groove (135); A clamping groove (137) is provided near the opening of the assembly groove (135); The sealing member (150) is installed in the assembly groove (135), and the clamping member (133) is installed in the clamping groove (137) and abuts against the sealing member (150); The clamping member (133) is provided with an external leakage hole, and the external leakage hole can allow a portion of the sealing member (150) to leak out; The spring (170) abuts against the valve body (131).

5. The moving iron core assembly according to claim 4, characterized in that: A sleeve ring platform (139) is provided on a side of the clamping member (133) away from the sealing member (150), and the spring (170) is sleeved on the sleeve ring platform (139).

6. The moving iron core assembly according to claim 4, characterized in that: The valve body (131) is made of metal and covers the side wall and the top wall of the sealing member (150).

7. The moving iron core assembly according to any one of claims 1 to 3, characterized in that: The movable valve (130) body is provided with a balancing flow channel (141) along its axial direction and / or the side wall of the installation groove (111).

8. The moving iron core assembly according to any one of claims 1 to 3, characterized in that: A balancing channel (122) is provided on the periphery of the moving iron core (110) along the axial direction of the moving iron core (110).

9. The moving iron core assembly according to any one of claims 1 to 3, characterized in that: An abutment boss (124) is provided at one end of the moving iron core (110) close to the mounting groove (111).

10. A solenoid valve, characterized in that: It comprises a valve body assembly (310), a coil (351), a valve closing spring (353) and a moving iron core assembly as claimed in any one of claims 1 to 9; The valve body assembly (310) is provided with an outlet (311) and an inlet (312); The outlet (311) is formed in the axial direction of the valve body assembly (310), and a valve seat (313) protruding toward the top is provided on the periphery of the outlet (311); The coil (351) is installed on the valve body assembly (310); The moving iron core (110) is movably installed in the valve body assembly (310), and the sealing member (150) is in contact with the valve seat (313); The valve closing spring (353) is configured to apply an elastic force toward the valve seat (313) to the moving iron core (110); When the coil (351) is powered off, the valve closing spring (353) can move the moving iron core (110) so that the valve seat (313) is inserted into the mounting groove (111) and abuts against the sealing member (150) to form a seal; In the first stage when the coil (351) is energized, the electromagnetic force can cause the moving iron core (110) to move upward relative to the movable valve (130) and cause the movable valve (130) to abut against the abutment portion (113); In the second stage when the coil (351) is energized, the electromagnetic force can cause the moving iron core (110) to move upward with the movable valve (130) so that the sealing member (150) is separated from the valve seat (313), thereby connecting the inlet (312) with the outlet (311); In the third stage when the coil (351) is energized, the electromagnetic force can move the moving iron core (110) to the topmost point, and the spring (170) can move the movable valve (130) relative to the moving iron core (110).

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