Electromagnetic valve with long service life

Abstract

The invention relates to the field of electromagnetic valves, in particular to an electromagnetic valve long in service life, which comprises a valve core assembly, a coil assembly and a valve body assembly which are designed in a split manner, and after being electrified, the coil assembly generates a magnetic field to attract a valve core in the valve core assembly to move, so that fluid on-off control is realized; the valve element assembly, the coil assembly and the valve body assembly are all made of high-performance materials, the abrasion resistance and the fatigue resistance of the electromagnetic valve can be effectively improved, the service life of the electromagnetic valve is further prolonged, and the problem that in the related technology, the electromagnetic valve is not prone to damage under the high-frequency switching and high-temperature environment is solved to a certain extent. And the service life of the electromagnetic valve is shortened due to easy abrasion and clamping stagnation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic valves, in particular to an electromagnetic valve with long service life. BACKGROUND

[0002] At present, the electromagnetic valve is an automatic device for controlling fluid flow by using electromagnetic force, which is widely used in industrial control systems. Its main function is to control the opening and closing of the valve body through on-off electrical signals, so as to realize the on-off control or flow regulation of gas, liquid or steam. When the electromagnetic valve coil is powered on, the electromagnetic force acts on the valve core to make the valve core move to open or close the valve port. When the coil is powered off, the spring or other reset mechanism will reset the valve core to close or open the valve port. The electromagnetic valve has the advantages of simple operation, only needs electrical signal control, fast response suitable for frequent operation, small size, and convenient installation.

[0003] The electromagnetic valve often needs to be used in high-frequency switching and high-temperature environment. In the environment of high-frequency switching, the valve core of the electromagnetic valve will rub against the valve seat or guide rail in frequent movement, causing component wear. Frequent on-off action can make the spring repeatedly compress and stretch, easily losing elasticity and reducing reset ability. Frequent power-on can cause the coil temperature to rise, affecting the performance of the insulating material, and even possibly burning out. In high-temperature environment, the sealing material (such as rubber and plastic) of the electromagnetic valve can easily age, soften or harden at high temperature, causing the sealing performance to decline. High temperature can cause the magnetic material of the coil to demagnetize, affecting the working efficiency of the electromagnetic valve. If there is a lubricant in the electromagnetic valve, high temperature can cause it to evaporate, thereby exacerbating friction and wear.

[0004] In order to solve the problem that the electromagnetic valve in the related art is prone to wear and jam in high-frequency switching and high-temperature environment, thereby shortening the service life of the electromagnetic valve, an electromagnetic valve with long service life is urgently needed. SUMMARY

[0005] In order to solve the problem that the electromagnetic valve in the related art is prone to wear and jam in high-frequency switching and high-temperature environment, thereby shortening the service life of the electromagnetic valve, the present application provides an electromagnetic valve with long service life.

[0006] The electromagnetic valve with long service life provided by the present application adopts the following technical solution: An electromagnetic valve with long service life comprises: A valve core assembly comprising a valve core and a spring, the valve core and the spring being coaxially arranged; A coil assembly arranged outside the valve core assembly to control the valve core assembly by generating a magnetic field through current; A valve body assembly arranged in a hollow shape, the valve body assembly being arranged outside the valve core assembly.

[0007] By adopting the technical scheme, the electromagnetic valve is composed of the spool assembly, the coil assembly and the valve body assembly, the coil assembly is externally arranged, heat dissipation is facilitated, and the coil aging problem during high-frequency operation is alleviated, the coil assembly is wrapped in the valve body assembly, and the influence of the external environment on the internal parts is reduced as much as possible, and the problem that the electromagnetic valve is prone to wear and seizure under high-frequency switching and high-temperature environment, thereby shortening the service life of the electromagnetic valve, is solved to a certain extent.

[0008] Optionally, the spool assembly comprises a first spool and a second spool, the first spool is fixedly connected in the coil assembly, and the second spool is slidably connected in the valve body assembly.

[0009] By adopting the technical scheme, the first spool is fixed, and the second spool is slidably connected, the function distribution of the spool is optimized, the precision of fluid control is improved, the friction loss of the first spool is reduced, and the service life of the electromagnetic valve as a whole is effectively improved.

[0010] Optionally, the first spool is made of high-strength stainless steel material, and the second spool is made of wear-resistant ceramic material.

[0011] By adopting the technical scheme, the first spool is made of high-strength stainless steel, can adapt to various corrosive fluid environments, and prolong the service life, the second spool is made of wear-resistant ceramic, significantly reduces the friction and wear during high-frequency switching, is suitable for high-frequency working conditions, and the combination of the two materials takes into account the impact resistance and fatigue resistance.

[0012] Optionally, the surface of the second spool is coated with a layer of nano ceramic coating.

[0013] By adopting the technical scheme, the coating improves the hardness and smoothness of the surface of the spool, and further reduces the friction.

[0014] Optionally, the spring is made of high-strength stainless steel material.

[0015] By adopting the technical scheme, the high-strength stainless steel material can withstand long-term high-frequency elastic deformation without failure.

[0016] Optionally, the sealing assembly comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged between the pipeline interface and the valve body assembly, and the second sealing ring is arranged between the second spool and the valve body assembly.

[0017] By adopting the technical scheme, the first sealing ring and the second sealing ring jointly ensure the sealing between the inside of the valve and the outside, and prevent leakage.

[0018] Optionally, the first sealing ring is made of hard alloy material, and the second sealing ring is made of fluororubber.

[0019] By adopting the above technical scheme, the hard alloy can resist high pressure and high temperature, can ensure the long-term sealing reliability of the pipeline interface, the fluororubber sealing ring has good high-temperature resistance and chemical corrosion resistance, can adapt to various fluid environments, and can enhance the sealing life.

[0020] Optionally, a plurality of groups of the second sealing ring are arranged along the length direction of the second valve core.

[0021] By adopting the above technical scheme, the plurality of groups of sealing rings are arranged along the length direction of the valve core, and the dynamic sealing performance is further improved.

[0022] Optionally, an overflow groove is further arranged on the valve body assembly, and the overflow groove is arranged close to the connection between the valve body assembly and the coil assembly.

[0023] By adopting the above technical scheme, the overflow groove can effectively alleviate the damage caused by pressure fluctuation or leakage of accumulated liquid.

[0024] Optionally, the valve core assembly can be manually controlled.

[0025] By adopting the above technical scheme, the manual control function ensures that the operation of the electromagnetic valve is not affected, and the reliability is improved.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. By arranging the electromagnetic valve of the present application in the form of a valve core assembly, a coil assembly and a valve body assembly, the heat dissipation performance of the electromagnetic valve can be effectively improved, and the friction loss of the electromagnetic valve can be reduced. The present application solves the problem that the electromagnetic valve is prone to wear and seizure in high-frequency switching and high-temperature environment, thereby shortening the service life of the electromagnetic valve. 2. The first valve core is made of high-strength stainless steel, which can adapt to various corrosive fluid environments and prolong the service life. The second valve core is made of wear-resistant ceramic, which can significantly reduce friction and wear during high-frequency switching and is suitable for high-frequency working conditions. The combination of the two materials takes into account the impact resistance and fatigue resistance. 3. The selection of the materials of the first sealing ring and the second sealing ring can effectively improve the reliability of the electromagnetic valve, thereby effectively improving the service life of the electromagnetic valve. 4. The manual control function ensures that the operation of the electromagnetic valve is not affected, and the reliability of the electromagnetic valve is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a whole structure schematic view of an electromagnetic valve with high service life according to an embodiment of the present application.

[0028] Figure 2 is a front view of a long service life electromagnetic valve according to an embodiment of the present application.

[0029] Figure 3 is Figure 2 an A-A sectional view of the

[0030] Figure 4 is Figure 3 an enlarged view of the A area in

[0031] Figure 5 is a structural detail view of a second spool of a long service life electromagnetic valve according to an embodiment of the present application.

[0032] Figure 6 is a structural detail view of a valve body assembly of a long service life electromagnetic valve according to an embodiment of the present application.

[0033] Explanation of Reference Signs: 1, spool assembly; 11, first spool; 12, second spool; 2, coil assembly; 3, valve body assembly; 4, seal assembly; 41, first seal ring; 42, second seal ring; 5, overflow groove. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying Figures 1-6 Further detailed description will be made to the present application.

[0035] The present application discloses a long service life electromagnetic valve.

[0036] It should be noted that in the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] It also needs to be explained that some conventional theoretical knowledge about solenoid valves is relatively easy for those skilled in the art to understand, but in order to make the present application easier to understand, specific elaboration is still made. The solenoid valve drives the valve core to act by electromagnetic induction to control the on-off of the fluid. Its working principle is that when the coil is powered on, the current passing through the coil generates an electromagnetic field, attracting the moving iron core to move towards the static iron core, pushing the valve core away from the valve seat or switching to the designated position, thereby opening or changing the fluid passage; when the coil is powered off, the magnetic field disappears, and the moving iron core returns to the initial position under the resetting force of the spring or the fluid pressure, closing the passage or restoring the default flow direction. The solenoid valve is simple in design, fast in response, and can stably operate in high-frequency switching, remote control and automation scenarios, and is suitable for flow, pressure or direction control of liquids and gases.

[0038] Reference Figure 1 A solenoid valve with a long service life includes a valve core assembly, a coil assembly 2, a valve body assembly 3, and the three are designed separately. The coil assembly 2 generates a magnetic field after being powered on, attracting the valve core in the valve core assembly to move, thereby realizing fluid on-off control. The valve core assembly, coil assembly 2 and valve body assembly 3 in the present application are all made of high-performance materials, which can effectively improve the wear resistance and fatigue resistance of the solenoid valve, thereby prolonging the service life of the solenoid valve. The present application solves the problem of wear and jam in the related art solenoid valve under high-frequency switching and high-temperature environment, thereby shortening the service life of the solenoid valve.

[0039] Specifically, referring to Figure 2 and Figure 3 , the valve core assembly includes a valve core group 1 and a spring, and the valve core group 1 and the spring are coaxially arranged. The valve core group 1 includes a first valve core 11 and a second valve core 12, the first valve core 11 is fixedly connected in the coil assembly 2, and the second valve core 12 is slidably connected in the valve body assembly 3. As for how the first valve core 11 is fixedly connected in the coil assembly 2, the present application is made by an integral molding process in the present application embodiment. In other embodiments, welding can also be used, which is also an embodiment that can be implemented by the present application. Specifically, in the present application embodiment, the coil assembly 2 is arranged outside the valve core assembly to control the valve core assembly by generating a magnetic field through current.

[0040] It should be noted here that since the improvement of the spring in the present application is mainly in the selection of the material, the spring is not specifically shown in the drawings of the present application specification, but those skilled in the art should be able to understand how the spring is arranged in combination with the principle of the solenoid valve and the textual description of the present application.

[0041] The first valve core 11 is fixed, and the second valve core 12 is slid, the function distribution of the valve core is optimized, the accuracy of fluid control is improved, and the friction loss of the first valve core 11 is reduced, so that the service life of the electromagnetic valve as a whole is effectively improved.

[0042] Further, in the embodiment of the application, the spring is made of high-strength stainless steel material. In other embodiments, nickel-based alloy, titanium alloy, beryllium copper, silicon manganese spring steel, carbon fiber composite material, etc. can also be used as the material of the spring, which is also a preferred embodiment of the application. The spring can be selected according to the working environment of the electromagnetic valve.

[0043] The high-strength stainless steel material can withstand long-term high-frequency elastic deformation without failure, and at the same time is suitable for humid, high-temperature or corrosive working conditions, avoiding damage to the valve function caused by spring failure.

[0044] Further, in the embodiment of the application, the first valve core 11 is made of high-strength stainless steel material, and the second valve core 12 is made of wear-resistant ceramic material. In other embodiments, the first valve core 11 can also be made of nickel-based alloy, titanium alloy, beryllium copper, silicon manganese spring steel, carbon fiber composite material, etc. as the material of the first valve core 11, which is also a preferred embodiment of the application. In other embodiments, the second valve core 12 can be made of tungsten carbide, titanium carbide, nickel-based alloy, etc. as the material of the second valve core 12, which is also a preferred embodiment of the application. The materials of the first valve core 11 and the second valve core 12 described above need to be selected according to the working environment of the electromagnetic valve.

[0045] The first valve core 11 is made of high-strength stainless steel, which can adapt to various corrosive fluid environments and prolong the service life. The second valve core 12 is made of wear-resistant ceramic, which significantly reduces friction and wear during high-frequency switching, is suitable for high-frequency working conditions, and the combination of the two materials takes into account the impact resistance and fatigue resistance.

[0046] Further, in the embodiment of the application, the surface of the second valve core 12 is coated with a layer of nano ceramic coating. In other embodiments, the surface of the second valve core 12 can also be coated with a tungsten carbide coating, a diamond coating, a titanium nitride coating, etc., which are all preferred embodiments of the application. The selection of the coating needs to be selected according to the working environment of the electromagnetic valve.

[0047] The coating improves the hardness and smoothness of the surface of the valve core, further reduces friction, the nano ceramic material has self-lubricating properties, reduces the dependence on lubricants during operation, and in harsh environments, the coating can effectively protect the substrate and delay the occurrence of corrosion and wear.

[0048] Specifically, referring to Figure 4 and Figure 5In the embodiment of the present application, the valve body assembly 3 is hollow, and the valve body assembly 3 covers the outside of the valve core assembly. In the embodiment of the present application, the valve body assembly 3 is a hollow cylindrical structure, which is compact in shape and convenient for connection with the pipeline, and has a flow channel designed inside for guiding the flow of fluid.

[0049] It should be further noted that, in the embodiment of the present application, the inlet and outlet holes of the fluid on the valve body assembly 3 are not specifically described, because the holes on the valve body assembly 3 are the core part of the electromagnetic valve for realizing accurate fluid control. Their design and layout determine the fluid passage, sealing property, durability and operating performance of the electromagnetic valve. In different application scenarios, multiple holes may be designed according to needs, which work together to ensure that the electromagnetic valve can work reliably and efficiently. However, this is not the distribution of the present application, and therefore is not specifically described.

[0050] Meanwhile, the valve body assembly 3 of the present application is provided with a lubrication system for the electromagnetic valve to realize lubrication, so that only a small amount of lubricating oil is needed to realize lubrication when the electromagnetic valve of the present application is maintained, thereby reducing friction and prolonging the service life of the electromagnetic valve of the present application.

[0051] Further, the valve body assembly 3 is also provided with an overflow groove 5, which is close to the connection between the valve body assembly 3 and the coil assembly 2.

[0052] The overflow groove 5 can effectively slow down the damage caused by pressure fluctuation or leakage of accumulated liquid. The overflow groove 5 close to the connection between the coil and the valve body reduces the pressure borne by the sealing assembly 4, delays aging, and at the same time, the overflow groove 5 facilitates the cleaning of accumulated liquid or impurities, reducing the difficulty of maintenance.

[0053] Specifically, referring to Figure 5 and Figure 6 The electromagnetic valve of the present application also includes a sealing assembly 4, which includes a first sealing ring 41 and a second sealing ring 42. The first sealing ring 41 is arranged between the pipeline interface and the valve body assembly 3, and the second sealing ring is arranged between the second valve core 12 and the valve body assembly 3.

[0054] The first sealing ring 41 and the second sealing ring 42 work together to ensure the sealing property between the inside of the valve and the outside, preventing leakage.

[0055] Further, the first sealing ring 41 is made of hard alloy material, and the second sealing ring 42 is made of fluorine rubber.

[0056] Hard alloy can resist high pressure and high temperature, and can ensure the long-term sealing reliability of the pipeline interface. The fluorine rubber sealing ring has good high temperature resistance and chemical corrosion resistance, and is suitable for various fluid environments, thereby enhancing the sealing life.

[0057] Further, the second sealing ring 42 is provided with multiple groups along the length direction of the second spool 12.

[0058] The multiple groups of sealing rings arranged along the length direction of the spool further improve the dynamic sealing performance, and prevent the risk of leakage caused by failure of a single sealing point under high pressure or high flow rate working conditions.

[0059] Specifically, the spool assembly can be manually controlled. A practical example is a pneumatic or hydraulic solenoid valve with a manual bypass function. These valves are controlled by the solenoid coil during normal operation, but when the electromagnetic system fails, the spool can be directly operated by a manual valve stem or a rotating valve stem, ensuring that the fluid control system can still operate.

[0060] In the event of a power outage or control system failure, the manual control function ensures that the valve operation is not affected, improving reliability. Manual control is easy to install and debug, reducing the reliance on complex operations of the electric control system, providing compatibility for automatic and manual operation scenarios, and meeting various needs.

[0061] The implementation principle of the solenoid valve with a long service life according to an embodiment of the present application is that the solenoid valve is set as a combination of a spool assembly, a coil assembly 2, and a valve body assembly 3. First, the external coil assembly 2 can facilitate heat dissipation, which helps to slow down the problem of coil aging during high-frequency operation. Second, the coil assembly 2 is wrapped in the valve body assembly 3, which can minimize the influence of the external environment on the internal parts. To some extent, the present application solves the problem that the solenoid valve in the related art is prone to wear and jam under high-frequency switching and high-temperature environments, thereby shortening the service life of the solenoid valve.

[0062] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made in terms of structure, shape, and principle based on the present application should be covered within the protection scope of the present application.

Claims

1. A solenoid valve with a long service life, characterized in that, Include: Valve core assembly, including valve core group (1) and spring, the valve core group (1) and spring coaxial arrangement; Coil assembly (2) is arranged outside the valve core assembly to control the valve core assembly by generating magnetic field through electric current; Valve body assembly (3) is arranged in a hollow state, the valve body assembly (3) is coated outside the valve core assembly.

2. The electromagnetic valve with a long service life according to claim 1, characterized by The valve core group (1) includes a first valve core (11) and a second valve core (12), the first valve core (11) is fixedly connected in the coil assembly (2), and the second valve core (12) is slidably connected in the valve body assembly (3).

3. The electromagnetic valve with high service life according to claim 2, characterized by The first valve core (11) is made of high-strength stainless steel material, and the second valve core (12) is made of wear-resistant ceramic material.

4. The electromagnetic valve with high service life according to claim 2, characterized by The surface of the second valve core (12) is coated with a layer of nano ceramic coating.

5. The electromagnetic valve with high service life according to claim 1, wherein The spring is made of high-strength stainless steel material.

6. The electromagnetic valve with high service life according to claim 2, wherein It also includes a sealing assembly (4), the sealing assembly (4) includes a first sealing ring (41) and a second sealing ring (42), the first sealing ring (41) is arranged between the pipeline interface and the valve body assembly (3), and the second sealing ring is arranged between the second valve core (12) and the valve body assembly (3).

7. The electromagnetic valve with high service life according to claim 6, characterized by The first sealing ring (41) is made of hard alloy material, and the second sealing ring (42) is made of fluorine rubber.

8. The electromagnetic valve with high service life according to claim 6, wherein The second sealing ring (42) is provided with a plurality of groups along the length direction of the second valve core (12).

9. The electromagnetic valve with high service life according to claim 6, wherein The valve body assembly (3) is also provided with an overflow groove (5), and the overflow groove (5) is close to the connection between the valve body assembly (3) and the coil assembly (2).

10. The electromagnetic valve of claim 1, wherein The valve core assembly can be manually controlled.

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