A combined electromagnetic control valve

Abstract

The present invention provides a combined electromagnetic control valve, belonging to the technical field of solenoid valves. The combined electromagnetic control valve includes a base and a solenoid valve assembly mounted on the base. The solenoid valve assembly includes a plurality of solenoid valves arranged side by side. The solenoid valve includes a valve body, a valve stem and an electromagnetic coil. One end of the valve stem located inside the flow passage is provided with an acting portion, and the acting portion includes a magnetic sheet, a sliding sleeve and an elastic member. Among them, the magnetic sheet is fixedly arranged on the top wall of the flow passage. The sliding sleeve is located below the magnetic sheet. The sliding sleeve is sleeved on the valve stem and is slidably connected to the valve stem, and the sliding sleeve can be attracted to the magnetic sheet. The two ends of the elastic member are respectively connected to the sliding sleeve and the bottom of the valve stem, and the elastic member can pull the sliding sleeve away from the magnetic sheet after the valve stem fits with the sealing sleeve. In the combined electromagnetic control valve of the present invention, the impact force of the bottom of the valve stem on the sealing sleeve is released in segments, which not only reduces the impact on the sealing sleeve and reduces wear, but also ensures that the sealing sleeve can receive sufficient pressing force to ensure the sealing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and particularly to a combined electromagnetic control valve. Background Art

[0002] An electromagnetic control valve is an industrial device controlled by electricity. It is a basic automation component for controlling fluids and belongs to an actuator, not limited to hydraulic or pneumatic applications. It is used in industrial control systems to adjust parameters such as the direction, flow rate, speed, and others of the medium. The electromagnetic control valve can cooperate with different circuits to achieve the expected control, and both the control accuracy and flexibility can be ensured. There are many types of electromagnetic control valves, and different electromagnetic control valves play roles in different positions of the control system. The most commonly used ones are check valves, safety valves, direction control valves, speed control valves, etc. In the prior art, the electromagnetic force of the solenoid valve can cause the valve stem to impact the valve body, and the excessive impact force causes wear between the valve stem and the valve body. Over time, the sealing effect is affected, resulting in leakage of the solenoid valve.

[0003] The information disclosed in the background art part of the present invention is only intended to deepen the understanding of the general background art of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0004] Based on this, in view of the problems existing in the current solenoid valve, it is necessary to provide a combined electromagnetic control valve to solve the problem of wear caused by the impact between the valve stem and the valve body inside the existing solenoid valve.

[0005] The above object is achieved by the following technical solutions:

[0006] A combined electromagnetic control valve includes a base and a solenoid valve assembly installed on the base. The solenoid valve assembly includes a plurality of solenoid valves arranged side by side.

[0007] Wherein, the solenoid valve includes a valve body, a valve stem, and an electromagnetic coil.

[0008] The valve body has a flow channel inside, and at least a part of the valve stem structure is located in the flow channel. A sealing sleeve is arranged in the flow channel, and the valve stem can fit with the end of the sealing sleeve to close the flow channel.

[0009] The valve stem is slidably arranged inside the valve body, and the electromagnetic coil is arranged on one side of the valve body. The electromagnetic coil is configured to drive the valve stem to move closer to the sealing sleeve when it is energized.

[0010] One end of the valve stem located inside the flow channel is provided with an acting part, and the acting part includes a magnetic sheet, a sliding sleeve, and an elastic member.

[0011] Among them, the magnetic sheet is fixedly arranged on the top wall of the flow channel;

[0012] The sliding sleeve is located below the magnetic sheet. The sliding sleeve is sleeved on the valve stem and is slidably connected to the valve stem. The sliding sleeve can be attracted to the magnetic sheet;

[0013] Both ends of the elastic member are respectively connected to the sliding sleeve and the bottom of the valve stem. The elastic member can pull the sliding sleeve away from the magnetic sheet after the valve stem is in contact with the sealing sleeve.

[0014] Furthermore, the acting part further includes a piston. The piston is fixedly connected to the sliding sleeve. The edge of the piston is in contact with the inner wall of the flow channel. The piston is configured to move towards the sealing sleeve side under the drive of the sliding sleeve, so as to form a pressure chamber between the piston and the sealing sleeve.

[0015] Furthermore, the acting part further includes a sealing plate, an airbag and a connecting ring;

[0016] Among them, the sealing plate is fixedly arranged at the bottom of the valve stem;

[0017] The connecting ring is fixedly arranged at the bottom of the sealing plate. The connecting ring can be in contact with the end of the sealing sleeve;

[0018] There are two airbags. The two airbags are respectively located inside and outside the sealing sleeve. The two airbags are communicated through the connecting ring.

[0019] Furthermore, chamfer structures are arranged on both the inner and outer sides of the end of the sealing sleeve. The airbag is of an annular structure and its cross-section is a D-shaped structure. The side wall of the airbag can be in contact with the chamfer structure.

[0020] Furthermore, the connecting ring is of a hollow structure. Through holes are arranged on both the inner ring surface and the outer ring surface of the connecting ring. The connecting ring is communicated with the airbag through the through holes.

[0021] Furthermore, the elastic member includes a first spring. The first spring is sleeved on the valve stem.

[0022] Furthermore, the valve body has a reset cavity. A part of the valve stem located in the reset cavity is sleeved with a second spring. A connecting piece is fixedly connected to a part of the valve stem located in the reset cavity. The second spring is respectively connected to the connecting piece and the top wall of the reset cavity.

[0023] Furthermore, the valve stem includes a blocking section and a pressing section arranged away from each other. The blocking section can be in contact with the end of the sealing sleeve. The pressing section can be attracted by the electromagnetic coil.

[0024] Furthermore, the solenoid valve is a normally open solenoid valve. When the solenoid valve is in the open state, the downward pressing section is located above the electromagnetic coil, and the cross-sectional area of the downward pressing section is larger than the cross-sectional area of the valve stem part structure below it.

[0025] Furthermore, the base has a total liquid inlet channel and a total liquid outlet channel. The liquid inlet end of the solenoid valve is connected to the total liquid inlet channel, and the liquid outlet end of the solenoid valve is connected to the total liquid outlet channel.

[0026] The beneficial effects of the present invention are:

[0027] In the combined electromagnetic regulating valve of the present invention, after the electromagnetic coil is energized, it attracts the valve stem to move downward until the bottom of the valve stem seals the sealing sleeve. During this process, the valve stem drives the elastic member to stretch. On the contrary, the elastic member exerts a pulling force on the valve stem to hinder the downward movement of the valve stem, thereby reducing the impact force of the bottom of the valve stem on the sealing sleeve, reducing the wear at the contact part between the bottom of the valve stem and the sealing sleeve, extending the service life of the valve stem and the sealing sleeve, and ensuring the sealing performance of the solenoid valve.

[0028] In the combined electromagnetic regulating valve of the present invention, when the bottom of the valve stem fits with the sealing sleeve, since the elastic member is stretched, the pulling force of the elastic member is greater than the attraction force between the magnetic sheet and the sliding sleeve. The elastic member pulls the sliding sleeve to move downward. During this process, the resistance of the elastic member to the valve stem disappears, and the valve stem can further press the sealing sleeve to ensure the sealing performance of the solenoid valve.

[0029] In the combined electromagnetic regulating valve of the present invention, the impact force of the bottom of the valve stem on the sealing sleeve is released in stages, which not only reduces the impact on the sealing sleeve and reduces wear, but also ensures that the sealing sleeve can receive sufficient pressing force to ensure the sealing performance. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the combined electromagnetic regulating valve according to an embodiment of the present invention;

[0031] Figure 2 is the front view of the combined electromagnetic regulating valve according to an embodiment of the present invention;

[0032] Figure 3 For the present invention Figure 2 is the A-A cross-sectional view of the combined electromagnetic regulating valve in the open state in the present invention;

[0033] Figure 4 For the present invention Figure 3 is the cross-sectional view of the combined electromagnetic regulating valve in the closed state in the present invention;

[0034] Figure 5 For the present invention Figure 3 is the partial enlarged view at B in the present invention;

[0035] Figure 6 For the present invention Figure 4 Partial enlarged view at position C in the present invention.

[0036] Wherein:

[0037] 100, base; 101, liquid outlet; 102, liquid inlet; 200, solenoid valve assembly; 210, electromagnetic coil; 220, valve stem; 221, blocking section; 222, second spring; 223, downward pressing section; 230, acting part; 231, piston; 232, sliding sleeve; 233, magnetic sheet; 234, first spring; 235, sealing plate; 236, airbag; 237, connecting ring; 240, valve body; 241, sealing sleeve; 250, first chamber; 260, second chamber. Specific embodiments

[0038] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise clearly specified and limited, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be construed as a limitation of the present invention.

[0040] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0041] In some embodiments, with reference to Figures 1 to 3, The combined electromagnetic control valve includes a base 100 and a solenoid valve assembly 200 mounted on the base 100. The solenoid valve assembly 200 includes a plurality of solenoid valves arranged side by side. The number of solenoid valves can be selected from 2 to 6, and the number of solenoid valves can be increased or decreased according to actual needs.

[0042] Among them, the solenoid valve includes a valve body 240, a valve stem 220, and an electromagnetic coil 210. The valve body 240 has a flow channel inside, and at least a part of the valve stem 220 is located in the flow channel. A sealing sleeve 241 is arranged in the flow channel, and the valve stem 220 can fit with the end of the sealing sleeve 241 to close the flow channel. The valve stem 220 is slidably arranged inside the valve body 240, and the electromagnetic coil 210 is arranged on one side of the valve body 240. The electromagnetic coil 210 is configured to drive the valve stem 220 to move closer to the sealing sleeve 241 when it is energized. It should be noted that gas or liquid can pass through the solenoid valve. Here, the liquid is taken as an example for illustration.

[0043] Refer to Figure 3 , The liquid enters the flow channel from the liquid inlet 102 at the bottom of the valve body 240. When the valve stem 220 and the sealing sleeve 241 are in a separated state, the liquid can flow out through the flow channel from the liquid outlet 101. At this time, the solenoid valve is in an open state; when the valve stem 220 and the sealing sleeve 241 are in a fitted state, the liquid cannot flow out through the flow channel from the liquid outlet 101. At this time, the solenoid valve is in a closed state.

[0044] Refer to Figure 5 and Figure 6 , One end of the valve stem 220 located inside the flow channel is provided with an acting part 230. The acting part 230 includes a magnetic sheet 233, a sliding sleeve 232, and an elastic member. Among them, the magnetic sheet 233 is fixedly arranged on the top wall of the flow channel; the sliding sleeve 232 is located below the magnetic sheet 233. The sliding sleeve 232 is sleeved on the valve stem 220 and is slidably connected to the valve stem 220. The sliding sleeve 232 can be attracted to the magnetic sheet 233; both ends of the elastic member are respectively connected to the sliding sleeve 232 and the bottom of the valve stem 220. The elastic member can pull the sliding sleeve 232 away from the magnetic sheet 233 after the valve stem 220 fits with the sealing sleeve 241.

[0045] Specifically in this embodiment, after the electromagnetic coil 210 is energized, it attracts the valve stem 220 to move downward until the bottom of the valve stem 220 blocks the sealing sleeve 241. During this process, the valve stem 220 drives the elastic member to stretch. Conversely, the elastic member exerts a pulling force on the valve stem 220 to hinder the downward movement of the valve stem 220, thereby reducing the impact force of the bottom of the valve stem 220 on the sealing sleeve 241, reducing the wear of the contact part between the bottom of the valve stem 220 and the sealing sleeve 241, extending the service life of the valve stem 220 and the sealing sleeve 241, and ensuring the sealing performance of the solenoid valve. Further, when the bottom of the valve stem 220 is in contact with the sealing sleeve 241, since the elastic member is stretched, the pulling force of the elastic member is greater than the attraction force between the magnetic sheet 233 and the sliding sleeve 232. The elastic member pulls the sliding sleeve 232 to move downward. During this process, the resistance of the elastic member to the valve stem 220 disappears, and the valve stem 220 can further press the sealing sleeve 241 to ensure the sealing performance of the solenoid valve. In this example, the impact force of the bottom of the valve stem 220 on the sealing sleeve 241 is released in segments, having a buffering effect, which not only reduces the impact on the sealing sleeve 241 and reduces wear, but also ensures that the sealing sleeve 241 can receive sufficient pressing force to ensure the sealing performance.

[0046] In some embodiments, the acting part 230 further includes a piston 231. The piston 231 is fixedly connected to the sliding sleeve 232. The edge of the piston 231 is in contact with the inner wall of the flow channel. The piston 231 is configured to be able to move toward the sealing sleeve 241 side under the drive of the sliding sleeve 232, so as to form a pressure chamber between the piston 231 and the sealing sleeve 241.

[0047] In the above embodiment, the solenoid valve is normally open. Before the solenoid valve is closed, there will be liquid in the flow channel. The sliding sleeve 232 drives the piston 231 to move downward, squeezing the liquid existing in the flow channel, so as to form a high-pressure chamber between the piston 231 and the sealing sleeve 241. The high-pressure chamber can increase the pressure of the bottom of the valve stem 220 on the sealing sleeve 241, which is helpful for improving the sealing performance.

[0048] In some embodiments, referring to Figure 5 and Figure 6 , the acting part 230 further includes a sealing plate 235, an airbag 236 and a connecting ring 237. Among them, the sealing plate 235 is fixedly arranged at the bottom of the valve stem 220. The connecting ring 237 is fixedly arranged at the bottom of the sealing plate 235. The connecting ring 237 can be in contact with the end of the sealing sleeve 241. There are two airbags 236. The two airbags 236 are respectively located inside and outside the sealing sleeve 241. The two airbags 236 are communicated through the connecting ring 237.

[0049] Specifically, in this embodiment, during the downward movement of the valve stem 220, the sealing plate 235 is driven to make the two air bags 236 fit against the inner and outer sides of the sealing sleeve 241 respectively. The air bags 236 are made of an elastic material, such as rubber. After being squeezed, the air bags 236 generate a certain amount of deformation and fit tightly against the sealing sleeve 241, enhancing the sealing performance.

[0050] In addition, in some cases of the solenoid valves in the prior art, such as when the pressure difference on both sides of the valve stem is too large, there is a high risk of leakage, which affects the safety of the electromagnetic control valve. Refer to Figure 6 , when the sealing plate 235 fits against the sealing sleeve 241, a first chamber 250 and a second chamber 260 are formed inside the flow channel. The second chamber 260 is in communication with the external liquid. Since the two air bags 236 are interconnected, the two air bags 236 can play a role in adjusting the pressure difference between the first chamber 250 and the second chamber 260 when the external liquid pressure fluctuates, so that the pressure difference between the first chamber 250 and the second chamber 260 is reduced, improving the impact resistance of the fitting part of the sealing plate 235 and the sealing sleeve 241 and preventing the leakage of the solenoid valve caused by the sudden change of the liquid pressure in the second chamber 260.

[0051] In some embodiments, chamfer structures are provided on both the inner and outer sides of the end of the sealing sleeve 241. The air bag 236 is of an annular structure and its cross-section is a D-shaped structure. The side wall of the air bag 236 can fit against the chamfer structure. The flat side of the air bag 236 fits against the chamfer structure. The two air bags 236 and the connecting ring 237 completely wrap and seal the end of the sealing sleeve 241, enhancing the sealing performance and preventing liquid leakage. Specifically, the two air bags 236 can be integrally formed, and the connecting ring 237 is located inside the air bag structure. Such a setting can make the fitting part of the sealing plate 235 and the sealing sleeve 241 made of elastic materials, further enhancing the sealing performance.

[0052] In some embodiments, the connecting ring 237 is of a hollow structure, and through holes are provided on both the inner ring surface and the outer ring surface of the connecting ring 237. The connecting ring 237 is connected to the air bag 236 through the through holes. The connecting ring 237 is made of a rigid material to prevent deformation and blockage of the through holes under the pressure of the sealing plate 235, affecting the gas flow between the air bags 236.

[0053] In some embodiments, the elastic member includes a first spring 234, and the first spring 234 is sleeved on the valve stem 220. A sleeve can be provided at the bottom of the first spring 234, and the bottom of the first spring 234 is connected to the sealing plate 235 through the sleeve.

[0054] In some embodiments, the valve body 240 has a reset cavity. A part of the valve stem 220 located in the reset cavity is sleeved with a second spring 222. A connecting piece is fixedly connected to the part of the valve stem 220 located in the reset cavity. The second spring 222 is connected to the connecting piece and the top wall of the reset cavity respectively. The second spring 222 has a pulling force. After the electromagnetic coil 210 is powered off, the second spring 222 pulls the valve stem 220 to move upward for reset.

[0055] In some embodiments, the valve stem 220 includes a plugging section 221 and a pressing section 223 which are arranged away from each other. The plugging section 221 can be attached to the end of the sealing sleeve 241, and the pressing section 223 can be attracted by the electromagnetic coil 210. The pressing section 223 can be made of materials such as iron, stainless steel, and nickel steel that can be attracted by a magnet.

[0056] In some embodiments, the solenoid valve is a normally open solenoid valve. When the solenoid valve is in the open state, the pressing section 223 is located above the electromagnetic coil 210, and the cross-sectional area of the pressing section 223 is larger than the cross-sectional area of a part of the valve stem 220 below it. After the electromagnetic coil 210 is energized, a magnetic force is generated. Under the action of the magnetic force, the electromagnetic coil 210 attracts the pressing section 223, causing the entire valve stem 220 to move downward and drive the plugging section 221 to block the sealing sleeve 241.

[0057] In some embodiments, referring to Figure 4 , the base 100 has a total liquid inlet channel and a total liquid outlet channel. The liquid inlet end of the solenoid valve is connected to the total liquid inlet channel, and the liquid outlet end of the solenoid valve is connected to the total liquid outlet channel. The base 100 has a liquid outlet 101 and a liquid inlet 102. The flow rate and pressure of the liquid outlet 101 are adjusted by controlling the opening and closing of each solenoid valve.

[0058] The working process of the combined electromagnetic control valve in the above embodiments is as follows: The solenoid valve is a normally open solenoid valve. When it is necessary to close the solenoid valve, after the electromagnetic coil 210 is energized, it attracts the valve stem 220 to move downward until the sealing plate 235 and the airbag 236 at the bottom of the valve stem 220 block the sealing sleeve 241. During this process, the valve stem 220 drives the first spring 234 to stretch. On the contrary, the first spring 234 exerts a pulling force on the valve stem 220 to hinder the downward movement of the valve stem 220, thereby reducing the impact force of the sealing plate 235 and the airbag 236 on the sealing sleeve 241 and reducing the wear of the contact part between the bottom of the valve stem 220 and the sealing sleeve 241; when the bottom of the valve stem 220 is in contact with the sealing sleeve 241, since the first spring 234 is stretched, the pulling force of the first spring 234 is greater than the attraction between the magnetic sheet 233 and the sliding sleeve 232, and the first spring 234 pulls the sliding sleeve 232 to move downward. During this process, the valve stem 220 can further press the sealing sleeve 241 to ensure the sealing performance of the solenoid valve. The sliding sleeve 232 drives the piston 231 to move downward, so that a high-pressure chamber is formed between the piston 231 and the sealing sleeve 241, which helps to improve the sealing performance. The two airbags 236 can also reduce the pressure difference between the first chamber 250 and the second chamber 260 and prevent the leakage of the solenoid valve caused by the sudden change of the liquid pressure in the second chamber 260.

[0059] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0060] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A combined electromagnetic regulating valve, characterized in that: It comprises a base (100) and a solenoid valve assembly (200) mounted on the base (100), wherein the solenoid valve assembly (200) comprises a plurality of solenoid valves arranged side by side; Wherein, the solenoid valve comprises a valve body (240), a valve stem (220) and a solenoid coil (210); The valve body (240) has a flow channel inside, at least a part of the structure of the valve stem (220) is located in the flow channel, a sealing sleeve (241) is provided in the flow channel, and the valve stem (220) can fit with the end of the sealing sleeve (241) to close the flow channel; The valve stem (220) is slidably disposed inside the valve body (240), the electromagnetic coil (210) is disposed on one side of the valve body (240), and the electromagnetic coil (210) is configured to drive the valve stem (220) to move closer to the sealing sleeve (241) when it is energized; An action portion (230) is provided at one end of the valve stem (220) located inside the flow channel, and the action portion (230) comprises a magnetic sheet (233), a sliding sleeve (232) and an elastic member; Wherein, the magnetic sheet (233) is fixedly arranged on the top wall of the flow channel; The sliding sleeve (232) is located below the magnetic sheet (233), the sliding sleeve (232) is sleeved on the valve stem (220) and is slidably connected to the valve stem (220), and the sliding sleeve (232) can be attracted to the magnetic sheet (233); Two ends of the elastic member are respectively connected to the sliding sleeve (232) and the bottom of the valve stem (220), and the elastic member can pull the sliding sleeve (232) and the magnetic sheet (233) apart after the valve stem (220) and the sealing sleeve (241) are in contact with each other; The action portion (230) further comprises a piston (231), wherein the piston (231) is fixedly connected to the sliding sleeve (232), an edge of the piston (231) is in contact with an inner wall of the flow channel, and the piston (231) is configured to be able to move toward one side of the sealing sleeve (241) under the drive of the sliding sleeve (232), so that a pressure chamber is formed between the piston (231) and the sealing sleeve (241); The action portion (230) further comprises a sealing plate (235), an air bag (236) and a connecting ring (237); Wherein, the sealing plate (235) is fixedly arranged at the bottom of the valve stem (220); The connecting ring (237) is fixedly arranged at the bottom of the sealing plate (235), and the connecting ring (237) can fit with the end of the sealing sleeve (241); Two airbags (236) are provided, and the two airbags (236) are respectively located on the inner side and the outer side of the sealing sleeve (241), and the two airbags (236) are connected via the connecting ring (237); The sealing sleeve (241) has chamfered structures on both inner and outer sides of its end, the airbag (236) is an annular structure and its cross section is a D-shaped structure, and the side wall of the airbag (236) can fit in with the chamfered structure; The connecting ring (237) is a hollow structure, and through holes are provided on the inner and outer ring surfaces of the connecting ring (237), and the connecting ring (237) is connected to the airbag (236) through the through holes; The valve stem (220) comprises a blocking section (221) and a pressing section (223) which are arranged away from each other, the blocking section (221) can fit with the end of the sealing sleeve (241), and the pressing section (223) can be attracted by the electromagnetic coil (210); The solenoid valve is a normally open solenoid valve. When the solenoid valve is in an open state, the pressing section (223) is located above the solenoid coil (210), and the cross-sectional area of ​​the pressing section (223) is larger than the cross-sectional area of ​​the valve stem (220) structure below it.

2. The combined electromagnetic regulating valve according to claim 1, characterized in that: The elastic member comprises a first spring (234), and the first spring (234) is sleeved on the valve stem (220).

3. The combined electromagnetic regulating valve according to claim 1, characterized in that: The valve body (240) has a reset cavity, a portion of the valve stem (220) located in the reset cavity is sleeved with a second spring (222), a portion of the valve stem (220) located in the reset cavity is fixedly connected to a connecting plate, and the second spring (222) is respectively connected to the connecting plate and the top wall of the reset cavity.

4. The combined electromagnetic regulating valve according to claim 1, characterized in that: The base (100) has a total liquid inlet channel and a total liquid outlet channel, the liquid inlet end of the solenoid valve is connected to the total liquid inlet channel, and the liquid outlet end of the solenoid valve is connected to the total liquid outlet channel.

Images