Solenoid valve
By designing a solenoid valve that includes an electromagnetic coil, a driver, and an end cap, and employing two-stage stroke adjustment and linear expansion, contraction, or thermal deformation of the material, the problem of unreliable opening and precise adjustment of existing solenoid valves is solved, thus achieving fine flow control.
Patent Information
- Application Number
- CN202520063231.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing single-stroke solenoid valves cannot reliably open and close, nor can they achieve precise adjustment, and cannot adapt to precise adjustments of different precision and water pressure.
The design employs an electromagnetic valve that includes an electromagnetic coil, a first actuator, a second actuator, an end cap, and an adjustment structure. It achieves precise flow control through two-stage stroke adjustment. The moving valve core of the second actuator undergoes linear expansion and contraction or thermal deformation under the action of an electromagnetic field. Combined with limiting components and elastic elements, it achieves precise sealing of the end cap.
It realizes two-stage adjustment of the solenoid valve, improves the accuracy and adaptability of the adjustment, and can adapt to the adjustment requirements of different precision and water pressure, so as to achieve fine flow regulation.
Smart Images
Figure CN223740166U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an electromagnetic valve. BACKGROUND
[0002] The electromagnetic valve usually utilizes the electromagnetic coil to generate electromagnetic force, thereby driving the valve core to move, to realize closing or opening the valve. Since the required valve opening power is large, the existing conventional single stroke electromagnetic valve needs larger coil size to obtain sufficient magnetic potential to ensure reliable opening of the control electromagnetic valve. The current common electromagnetic valve is prone to failure to open. The prior art can only adjust one section by driving the movement of the valve core, and cannot achieve fine adjustment of different thicknesses, and cannot adapt to precise adjustment of different precision and water pressure. SUMMARY
[0003] The utility model solves the technical problems that the prior art single stroke electromagnetic valve cannot reliably open and close, and cannot achieve precise adjustment, and provides an electromagnetic valve.
[0004] The utility model solves the above technical problems through the following technical scheme:
[0005] An electromagnetic valve comprises an electromagnetic coil, a first driver, a second driver, an end cover and an adjusting structure, the adjusting structure is provided with a valve port, two ends of the second driver are connected to the first driver and the end cover respectively, the electromagnetic coil is sleeved on the first driver and the second driver and is used for driving the movement of the first driver and the second driver respectively, so that the first driver drives the second driver and the end cover to move along the direction close to the valve port, to realize that the end cover and the valve port have a certain interval, and the second driver drives the end cover to move along the direction close to the valve port, to realize that the end cover is sealed against the valve port.
[0006] In the scheme, when the electromagnetic coil is powered, an electromagnetic field is generated, the first driver moves in the direction of the valve port under the action of the magnetic field, the first driver drives the second driver and the end cover to move along the direction close to the valve port to complete the first stroke, at this time, the end cover and the valve port still have a certain interval. Then, the electromagnetic coil is continuously powered on the basis, the second driver is elongated, the second driver drives the end cover to continue moving along the direction close to the valve port, so that the end cover is sealed against the valve port, and the second stroke is completed. The second stroke can be adjusted by the size of the additional current, so as to control the distance of the second stroke, and through the action of the end cover on the adjusting structure, fine displacement adjustment is realized, so as to realize fine flow adjustment.
[0007] Preferably, the second driver comprises a valve core shell and a moving valve core, one end of the valve core shell abuts against the first driver, the other end of the valve core shell is provided with a valve core cavity towards the valve, one end of the moving valve core is connected to the end cover, the other end of the moving valve core is inserted into the valve core cavity and can move in the valve core cavity towards or away from the valve port.
[0008] In the present scheme, the moving valve core of the second driver is in the inner cavity of the valve core shell of the second driver, under the action of the electromagnetic field when the current is increased, the moving valve core moves in the inner cavity of the valve core shell towards the valve port, when the electromagnetic field disappears, the moving valve core moves in the inner cavity of the valve core shell away from the valve port, the end cover is always connected to one end of the moving valve core, so that the end cover is pushed by the moving valve core to control the opening or closing and fine displacement of the adjusting structure.
[0009] Preferably, the electromagnetic valve further comprises a limiting component, the limiting component is located between the valve core shell and the end cover, and the limiting component abuts against the valve core shell to limit the movement of the valve core shell and the first driver towards the valve port.
[0010] Preferably, the valve core shell comprises an abutting end and a sleeve part, the abutting end is connected to the end of the sleeve part and extends radially outward, the abutting end abuts against the first driver, and the valve core cavity is located in the sleeve part.
[0011] In the present scheme, the limiting component is sleeved outside the sleeve part of the valve core shell, when the valve core shell and the first driver continuously move towards the valve port to a certain position, the abutting end of the valve core shell is limited by the limiting component to prevent the valve core shell from further moving towards the valve port, the abutting end of the valve core shell abuts against the first driver, when the abutting end of the valve core shell is limited to move, the first driver is also limited to continuously move towards the valve port, and the valve core shell and the first driver no longer move. The second driver comprises the valve core shell and the moving valve core, the moving valve core is not limited by the limiting component in the valve core cavity in the valve core shell, when the valve core shell is limited to no longer further move towards the valve port, the moving valve core is still not limited and can move in the valve core cavity towards or away from the valve port.
[0012] Preferably, the electromagnetic valve further comprises an elastic member, two ends of the elastic member abut against the valve core shell and the limiting component respectively.
[0013] In the scheme, the valve core shell comprises an abutting end and a sleeve part, the elastic part is arranged outside the sleeve part, one end of the elastic part abuts against the abutting end of the valve core shell, and the other end of the elastic part abuts against the limiting part. When the electromagnetic coil is connected with current, under the action of the electromagnetic field, the first driver and the valve core shell move in the direction of approaching the valve port, and the elastic part arranged between the limiting part and the valve core shell is continuously compressed until completely compressed; when the electromagnetic coil is disconnected with current, the electromagnetic field action disappears, and the elastic part resets under the action of the rebound force, and drives the valve core shell and the first driver to reset and move in the direction of moving away from the valve port.
[0014] Preferably, the elastic part is a reset spring, and the reset spring is sleeved on the valve core shell.
[0015] In the scheme, the reset spring is sleeved outside the sleeve part of the valve core shell, and the reset spring abuts against the abutting end of the valve core shell and the first driver. When the electromagnetic coil is connected with current, the abutting end of the valve core shell moving in the direction of the valve port is compressed, and when the electromagnetic coil is disconnected with current, the reset spring resets under the action of the rebound force, and the rebound force resets and moves the valve core shell and the first driver in the direction of moving away from the valve port.
[0016] Preferably, the moving valve core is a material that linearly elongates under the action of the magnetic field or when heated.
[0017] In the scheme, the second driver comprises a valve core shell and a moving valve core, the moving valve core is arranged in the valve core shell and can move in the direction of approaching the valve port or moving away from the valve port, as the current increases, the moving valve core is linearly stretched and lengthened, one end of the moving valve core is connected with the end cover, and the end cover is pushed by the elongated moving valve core and moves toward the valve port. Alternatively, the moving valve core is linearly stretched and lengthened when heated, and also pushes the end cover connected at one end to move toward the valve port.
[0018] Preferably, the material of the moving valve core is super magnetostrictive material, graphene material or memory alloy material.
[0019] In the present scheme, the mobile valve core material is super magnetostrictive material, and its working principle is based on the magnetoelasticity of magnetic material. If a magnetic material can change in its magnetic induction field as the result of external tension or compression force. Magnetic field and electric field can also cause the elongation and shortening of the size of the object. The ferromagnetic material is elongated or shortened under the action of external magnetic field, and returns to the original length after the external magnetic field is removed. The magnetostriction effect refers to the fact that the size and shape of the ferromagnetic material change when it is magnetized in a magnetic field. The mechanism of this phenomenon is that the ferromagnetic or ferrimagnetic material is spontaneously magnetized below the Curie point to form magnetic domains. When an external magnetic field is applied, the magnetic domains inside the material immediately rotate, making the magnetization direction of each magnetic domain consistent, and the macroscopic effect of the object is elongated or shortened along the magnetic field direction.
[0020] When the material of the mobile valve core is graphene material, the graphene material expands in the heated state, pushing the end cover connected to one end of the mobile valve core to move towards the valve port.
[0021] The material of the mobile valve core is a memory alloy material. The shape memory alloy with a very significant change (contraction) in length when heated can be deformed under the action of mechanical force, and will return to their pre-deformation state when heated. Because they are electrically conductive, they can be heated by electric current. Deformation causes the material to change from one crystal orientation to another, and this process can be reversed by heating.
[0022] Preferably, the electromagnetic valve further comprises a valve core shell, the first driver and the second driver are arranged in the valve core shell, the valve core shell is located in the electromagnetic coil, and a heat dissipation channel is formed between the outer wall surface of the valve core shell and the inner wall surface of the electromagnetic coil.
[0023] In the present scheme, the outer wall surface of the valve core shell is not attached to the inner wall surface of the electromagnetic coil, and a heat dissipation channel is left between them. When the electromagnetic coil is in an energized state, the temperature rises, and ventilation and heat dissipation are achieved through the channel.
[0024] Preferably, the end cover is made of flexible material.
[0025] In the present scheme, the end cover connected to one end of the mobile valve core is made of flexible material, has good sealing performance, and has plastic deformation when moved by the mobile valve core towards the valve port.
[0026] On the basis of common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred embodiments of the present utility model.
[0027] The positive progress effect of the present utility model is that:
[0028] This invention's solenoid valve achieves two-stage adjustment. In particular, the second-stage adjustment utilizes the linear expansion and contraction of the material, improving adjustment accuracy and adapting to varying precision and water pressure requirements. By achieving fine displacement adjustment, fine flow rate regulation is thus realized. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the structure of the solenoid valve according to an embodiment of the present invention.
[0030] Figure 2 This is a cross-sectional view of the solenoid valve according to an embodiment of the present utility model.
[0031] Figure 3 This is a schematic diagram of the internal structure of the solenoid valve in an embodiment of the present invention.
[0032] Explanation of reference numerals in the attached figures:
[0033] 100 First Drive
[0034] 11 Valve Core Housing
[0035] 12 heat dissipation channels
[0036] 200 Second Drive
[0037] 21 Valve Core Housing
[0038] 211 Affiliation End
[0039] 212 Sleeve section
[0040] 22 movable valve core
[0041] 300 end cap
[0042] 400 Adjustment Structure
[0043] 41 Valve Port
[0044] 500 coil
[0045] 600 limit component
[0046] 700 return spring
[0047] 800 bracket Detailed Implementation
[0048] The following examples, in conjunction with the appendix, illustrate the concepts. Figure 1 The present invention is described in a clearer and more complete manner, but is not limited to the scope of the embodiments described below.
[0049] like Figures 1-3As shown, this embodiment discloses a solenoid valve, which includes an electromagnetic coil 500, a first actuator 100, a second actuator 200, an end cap 300, and an adjustment structure 400. The adjustment structure 400 has a valve port 41. The two ends of the second actuator 200 are respectively connected to the first actuator 100 and the end cap 300. The electromagnetic coil 500 is disposed in a bracket 800. The electromagnetic coil 500 is sleeved on the first actuator 100 and the second actuator 200 and is used to drive the movement of the first actuator 100 and the second actuator 200, so that the first actuator 100 drives the second actuator 200 and the end cap 300 to move in a direction close to the valve port 41, so as to achieve a certain distance between the end cap 300 and the valve port 41. The second actuator 200 drives the end cap 300 to move in a direction close to the valve port 41, so as to achieve the sealing of the end cap 300 against the valve port 41.
[0050] In this embodiment, the first actuator 100, the second actuator 200, the end cap 300, and the adjusting structure 400 are installed sequentially. When the electromagnetic coil 500 is energized, under the influence of the electromagnetic field, the first actuator 100 moves towards the valve port 41, sequentially pushing the second actuator 200 and the end cap 300 towards the valve port 41, completing the first stage of the stroke. When the current in the electromagnetic coil 500 further increases, the second actuator 200, under the influence of the electromagnetic field, pushes the end cap 300 further towards the valve port 41. When the second stage of the stroke is at its maximum, the second actuator 200 will drive the end cap 300 to completely close the valve port 41 of the adjusting structure 400. The stroke distance of the second stage is linearly related to and measurable with the increase in the current of the electromagnetic coil 500. By increasing the current value, the stroke distance of the second stage is controlled, thereby precisely controlling the flow rate.
[0051] like Figure 2 As shown, the second actuator 200 in this embodiment includes a valve core housing 21 and a movable valve core 22. One end of the valve core housing 21 abuts against the first actuator 100, and the other end of the valve core housing 21 faces the valve port 41 and has an inwardly recessed valve core cavity. One end of the movable valve core 22 is connected to the end cap 300, and the other end of the movable valve core 22 is inserted into the valve core cavity and can move in the valve core cavity in a direction close to or away from the valve port 41.
[0052] Specifically, one end of the mobile spool 22 in the embodiment is in the middle of the spool cavity in the spool shell 21, and the other end extends out of the spool cavity of the spool shell 21 and is connected to the end cover 300. When the spool shell 21 is moved in the first stroke, that is, the electromagnetic coil 500 is connected to the current, the electromagnetic field generated drives the first driver 100 to move, the spool shell 21 is pushed by the first driver 100 to move in the direction of approaching the valve port 41, and the mobile spool 22 moves in the direction of the valve port 41 along with the spool shell 21, and pushes the end cover 300 connected at one end to move to a certain distance from the valve port 41; then when the electromagnetic coil 500 increases the connected current to start the second stroke, the mobile spool 22 pushes the end cover 300 connected at one end to move in the direction of the valve port 41 to approach the valve port 41 to complete the second stroke, and the distance of the second stroke is accurately adjusted by the increased current value, thereby controlling the flow of the valve, and the end cover 300 can be completely sealed against the valve port 41 in the maximum stroke.
[0053] As shown in Figure 2 , the spool shell 21 of the embodiment includes an abutting end 211 and a sleeve part 212, the abutting end 211 is connected to the end of the sleeve part 212 and extends radially outward, the abutting end 211 abuts against the first driver 100, and the spool cavity is located in the sleeve part 212.
[0054] Specifically, the abutting end 211 of the spool shell 21 abuts against the first driver 100, and when the spool shell 21 is moved in the first stroke, that is, the electromagnetic coil 500 is connected to the current, the electromagnetic field generated drives the first driver 100 to move, the first driver 100 drives the abutting end 211 of the spool shell 21 to move, and through the connection of the abutting end 211 and the sleeve part 212 of the spool shell 21, the entire spool shell 21 is pushed by the first driver 100 to move in the direction of approaching the valve port 41. With respect to the cross section of the first driver 100, the cross section of the sleeve part 212 of the spool shell 21 is smaller, the abutting end 211 of the spool shell 21 abuts against the first driver 100 completely, and the cross sections are consistent. The spool cavity in the sleeve part 212 is hollow and can accommodate the mobile spool 22, and the mobile spool 22 can move freely in the direction of approaching or moving away from the valve port 41.
[0055] As shown in Figure 2 , the electromagnetic valve of the embodiment further includes a limiting component 600, the limiting component 600 is located between the spool shell 21 and the end cover 300, and the limiting component 600 abuts against the spool shell 21 to limit the movement of the spool shell 21 and the first driver 100 in the direction of approaching the valve port 41.
[0056] Specifically, in this embodiment, the limiting component 600 is sleeved on the sleeve portion 212 of the valve core shell 21, with its two ends abutting against the abutting end 211 of the valve core portion and the end cover 300, respectively. When the electromagnetic coil 500 is connected to the current, the first driver 100 moves under the action of the electromagnetic field, driving the valve core shell 21 to push the end cover 300 to move continuously in the direction close to the valve port 41. When it reaches the limiting component 600, the stroke is limited, and the first stroke is completed.
[0057] like Figure 2 As shown, the solenoid valve in this embodiment also includes an elastic element, the two ends of which abut against the valve core shell 21 and the limiting component 600, respectively. The elastic element is a resettable component such as the return spring 700 in this embodiment, which is sleeved on the valve core shell 21 in this embodiment.
[0058] Specifically, in this embodiment, when the solenoid valve is working, the first driver 100 moves toward the end cover 300 and presses the reset spring 700. When the solenoid valve stops working, the reset spring 700 rebounds and resets the first driver 100 in a direction away from the end cover 300.
[0059] like Figure 3 As shown, the movable valve core 22 in this embodiment is a material that linearly elongates under the action of a magnetic field or when heated. The material of the movable valve core 22 is a super magnetostrictive material, graphene material, or shape memory alloy material.
[0060] Specifically, in this embodiment, the movable valve core 22 is made of a magnetostrictive material. After the first actuator 100 completes the first stroke, the current of the electromagnetic coil 500 is increased. Under the action of the electromagnetic field, the movable valve core 22, made of the magnetostrictive material, is stretched. The movable valve core 22 drives the end cap 300 to move towards the valve port 41. By controlling the increased current, the movable valve core 22 linearly elongates, thereby controlling the flow rate in the solenoid valve. At the maximum current, the movable valve core 22 can drive the end cap 300 to close the valve port 41. The movement of the movable valve core 22 after linear elongation is the second stroke of the solenoid valve, which can be finely adjusted by increasing the current value. Of course, in other embodiments, the material of the movable valve core 22 can also be graphene or shape memory alloy.
[0061] like Figure 2 As shown, the solenoid valve in this embodiment also includes a valve core housing 11. The first actuator 100 and the second actuator 200 are both disposed inside the valve core housing 11. The valve core housing 11 is located inside the solenoid coil 500, and a heat dissipation channel 12 is formed between the outer wall surface of the valve core housing 11 and the inner wall surface of the solenoid coil 500.
[0062] Specifically, the electromagnetic coil 500 of the embodiment emits heat in the energized state, and if there is no timely ventilation and heat dissipation, the temperature of the coil 500 will continue to rise, and there is a risk of being burned out. The valve core shell 11 of the embodiment does not completely abut against the electromagnetic coil 500, but leaves a gap, and a heat dissipation channel 12 is left between the outer wall surface of the valve core shell 11 and the inner wall surface of the electromagnetic coil 500, so that the electromagnetic coil 500 has a heat dissipation channel, and the risk of the electromagnetic coil 500 being burned out is reduced.
[0063] As shown in Figure 3 The end cover 300 of the embodiment is a flexible material. The end cover 300 of the case is set to be a flexible material with good plasticity and can be deformed.
[0064] The outer peripheral surface of the movable valve core 22 has an inwardly recessed clamping groove, and the end cover 300 is embeddedly connected in the clamping groove. In this way, when it is in contact with the movable valve core 22, it is wrapped and adhered to one end of the movable valve core 22. The connecting end of the movable valve core 22 is set to be inwardly recessed, and can be embeddedly connected with the end cover 300. When it needs to abut against the valve port 41 of the adjusting structure 400, it can close the valve port 41.
[0065] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only an example, the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, but these changes and modifications all fall within the protection scope of the utility model.
Claims
1. An electromagnetic valve characterized by comprising: The electromagnetic valve comprises an electromagnetic coil, a first driver, a second driver, an end cover and an adjusting structure, the adjusting structure is provided with a valve port, two ends of the second driver are connected to the first driver and the end cover respectively, the electromagnetic coil is sleeved on the first driver and the second driver and is used for driving the movement of the first driver and the second driver respectively, so that the first driver drives the movement of the second driver and the end cover in the direction of approaching the valve port, so as to realize that the end cover has a certain interval with the valve port, and the second driver drives the movement of the end cover in the direction of approaching the valve port, so as to realize that the end cover is sealed against the valve port.
2. The electromagnetic valve according to claim 1, wherein The second driver comprises a valve core shell and a movable valve core, one end of the valve core shell is against the first driver, the other end of the valve core shell is towards the valve port and is provided with a valve core cavity which is recessed inward, one end of the movable valve core is connected to the end cover, and the other end of the movable valve core is inserted into the valve core cavity and can move in the direction of approaching or moving away from the valve port in the valve core cavity.
3. The electromagnetic valve according to claim 2, wherein The electromagnetic valve further comprises a limiting component, the limiting component is located between the valve core shell and the end cover, and the limiting component is against the valve core shell to limit the movement of the valve core shell and the first driver in the direction of approaching the valve port.
4. The electromagnetic valve according to claim 3, wherein The electromagnetic valve further comprises an elastic member, two ends of the elastic member are against the valve core shell and the limiting component respectively.
5. The electromagnetic valve according to claim 4, wherein The elastic member is a return spring, and the return spring is sleeved on the valve core shell.
6. The electromagnetic valve according to claim 2, wherein The valve core shell comprises an abutting end and a sleeve part, the abutting end is connected to the end of the sleeve part and extends radially outward, the abutting end is against the first driver, and the valve core cavity is located in the sleeve part.
7. The electromagnetic valve according to claim 2, wherein The movable valve core is a material which linearly elongates under the action of a magnetic field or under heating.
8. The electromagnetic valve according to claim 7, wherein The material of the movable valve core is super magnetostrictive material, graphene material or memory alloy material.
9. The electromagnetic valve according to claim 1, wherein The electromagnetic valve further comprises a valve core housing, the first driver and the second driver are arranged in the valve core housing, the valve core housing is located in the electromagnetic coil, and a heat dissipation channel is formed between the outer wall surface of the valve core housing and the inner wall surface of the electromagnetic coil.
10. The electromagnetic valve according to claim 1, wherein The end cover is made of flexible material.