Fiber-reinforced superhigh-pressure direct-acting electromagnetic valve

Abstract

The application provides a fiber material reinforced superhigh pressure direct acting electromagnetic valve, and belongs to the technical field of electromagnetic valve design, which comprises a valve body, a sealing pipe assembly, a winding body, a movable iron core assembly, a valve port sealing element, an electromagnetic coil and a magnetic conductive shell. The fiber material reinforced structure design skillfully solves the contradiction between pressure bearing capacity and magnetic circuit efficiency in the superhigh pressure electromagnetic valve field, optimizes the overall mechanical properties of the electromagnetic valve, guarantees the magnetic circuit efficiency, effectively enhances the mechanical properties of the movable part due to the high strength of the fiber material, thereby improving the performance of the movable part, effectively solving the dynamic response lag bottleneck, and improving the response speed. In the sealing part, the fiber material reinforcement can enhance the overall strength and stability of the sealing part, and the good corrosion resistance of the fiber material can prevent the sealing part from being corroded by the medium and failing, completely eliminating the sealing instability hidden danger in the high pressure environment, and guaranteeing the sealing reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electromagnetic valve design, in particular to a fiber material reinforced ultra-high pressure direct-acting electromagnetic valve. BACKGROUND

[0002] As the core executive element of fluid control system, electromagnetic valve has the functions of controlling fluid switch, changing fluid direction and regulating flow size. Due to its convenience and small size, electromagnetic valve is widely used in various fields of society.

[0003] With the continuous progress of science and technology, various application environments and equipment have increasingly higher requirements for fluid pressure, which also puts forward higher standards for the performance of electromagnetic valve. In the ultra-high pressure application scene, the electromagnetic valve in the prior art faces several key technical contradictions and problems:

[0004] Conflict between magnetic circuit efficiency and pressure bearing capacity: In the working environment of ultra-high pressure, in order to improve the pressure bearing capacity of the sealing pipe of electromagnetic valve, the prior art usually adopts the method of thickening the metal component, such as using stainless steel valve body. However, the increase of metal thickness will significantly increase the magnetic resistance, which seriously hinders the penetration of magnetic force line. This not only leads to the reduction of electromagnetic force, but also forces the coil to need larger current to drive, thereby causing problems such as energy consumption rising and heat loss out of control. Specifically, the electromagnetic valve has the conditions of low magnetic circuit efficiency, large magnetic resistance, no good closed loop of magnetic conducting parts, serious leakage of magnetic force line, high energy consumption and large current driving, insufficient electromagnetic force, etc.

[0005] In the prior art, the method of thickening the valve body can improve the pressure bearing performance in the short term, but it will reduce the magnetic circuit efficiency and form a performance bottleneck. In addition, there is also a method of using multiple coils to compensate, but this method can only alleviate the problem of magnetic hysteresis and cannot fundamentally solve the core contradiction of magnetic resistance, and cannot break through the physical limitation of the thickness of the sealing pipe to the magnetic circuit.

[0006] Opening and closing response speed problem: At the moment of opening and closing, the traditional metal sealing pipe of electromagnetic valve will produce strong eddy current. This strong eddy current will weaken the driving magnetic field in the opposite direction, which will hinder the opening and closing process of the electromagnetic valve, and further reduce the response speed of the electromagnetic valve.

[0007] The influence of vibration on the sealing performance: In some mobile devices or devices with strong vibration, the electromagnetic valve will be disturbed by strong vibration. In this case, the sealing force of the valve port will fluctuate with the vibration, which has a great influence on the sealing performance of the electromagnetic valve. SUMMARY

[0008] (1) Technical problems to be solved.

[0009] The present application provides a kind of fiber material reinforced superhigh pressure direct-acting electromagnetic valve to solve the problems of pressure capacity and magnetic circuit efficiency contradiction, high pressure sealing instability and dynamic response lag of existing superhigh pressure electromagnetic valve in the prior art.

[0010] (II) Technical solutions.

[0011] To solve the technical problem, the present application provides a kind of fiber material reinforced superhigh pressure direct-acting electromagnetic valve, comprising a valve body, a sealing pipe assembly connected to the upper end of the valve body;

[0012] The sealing pipe assembly comprises an upper sealing pipe, a lower sealing pipe and a sealing assembly, and the lower sealing pipe is in direct contact with the upper sealing pipe to form a closed magnetic circuit.

[0013] The winding body is tightly wound around the outer surface of the sealing pipe assembly.

[0014] The movable iron core assembly comprises a needle limiting ring, a valve port sealing needle, a sealing spring and a return spring, and is arranged in the sealing pipe assembly.

[0015] The valve port sealing element comprises a main valve port and an air inlet groove, and is fixedly installed on the inner lower end of the sealing pipe assembly and tightly connected with the sealing pipe assembly.

[0016] The electromagnetic coil is installed at the rear end (or nearby) of the movable iron core assembly, and is covered by the magnetic conductive shell, connected and tightly fitted.

[0017] The magnetic conductive shell is usually connected with the valve body by bolts, buckles or other fixing structures.

[0018] By adopting the above technical solutions, the superhigh pressure electromagnetic valve can break through the magnetic shielding bottleneck caused by metal thickening, suppress eddy current loss to improve dynamic response and eliminate the risk of sealing failure under high pressure vibration, etc.

[0019] Further, the valve body is provided with an inner sealing groove and an inner sealing ring for blocking unintended leakage between the air inlet and the air outlet.

[0020] By adopting the above technical solutions, the valve body is designed and installed in a specific structure to ensure stable operation and efficient sealing of the electromagnetic valve under superhigh pressure working conditions.

[0021] Further, the lower sealing pipe and the upper sealing pipe are provided with a non-magnetic middle sealing pipe, and the three are connected through a sealing assembly; the sealing assembly comprises a sealing groove, a sealing gasket and a sharp sealing surface, and realizes airtight sealing through thread extrusion.

[0022] By adopting the technical scheme, the sealing pipe can withstand super-high pressure and form a closed magnetic circuit to improve electromagnetic force, provide a movement space for the movable core assembly, and ensure sealing.

[0023] Further, the winding body is a carbon fiber large-tension wet winding layer, which can improve the pressure-bearing capacity of the sealing pipe assembly to super-high pressure working conditions.

[0024] By adopting the technical scheme, the carbon fiber large-tension wet winding layer can improve mechanical and structural performance by virtue of high-strength bearing, enhanced rigidity stability, good interlayer combination, strong designability, and the like, and has the advantages of improving production efficiency, reducing cost, and enhancing environmental adaptability such as corrosion resistance and fatigue resistance, with remarkable application benefits.

[0025] Further, the plunger limiting ring is arranged at the lower end of the movable core assembly, and the return spring is arranged at the upper end of the movable core assembly; the plunger limiting ring is in sliding cooperation with the valve port sealing plunger, and sealing pre-tightening force is provided by the sealing spring to form a sealing balance device capable of offsetting vibration interference.

[0026] By adopting the technical scheme, the separate double design of the return spring of the movable core assembly and the sealing spring of the valve port sealing plunger forms a sealing balance device capable of offsetting vibration interference, which effectively improves the maximum bearing pressure of the electromagnetic valve and further improves the maximum electromagnetic force of the electromagnetic valve.

[0027] Further, the valve port sealing member is made of high-performance special engineering plastic material, and an air inlet groove is formed in the side wall of the valve port sealing member, and the main valve port cooperates with the valve port sealing plunger at the lower end of the movable core assembly to control air flow on-off.

[0028] By adopting the technical scheme, the air inlet groove can further enhance the sealing effect.

[0029] Further, the electromagnetic coil is provided with an insulating layer, and the electromagnetic coil is a non-skeleton coil, thereby reducing the volume of the electromagnetic coil.

[0030] By adopting the technical scheme, the non-skeleton coil of the electromagnetic coil has a small volume, and the small electromagnetic coil volume can enhance the magnetic field strength and increase the magnetic flux under reasonable design, so the electromagnetic force is further improved.

[0031] Further, the magnetically conductive shell covers the electromagnetic coil and forms a continuous magnetic conduction loop with the lower sealing pipe and the upper sealing pipe, so that the electromagnetic force is improved.

[0032] By adopting the technical scheme, the structure can reduce magnetic resistance, concentrate magnetic field, and enhance magnetic flux density, thereby improving the force of the magnetic field on the core and the like. Advantages

[0033] The beneficial effects of the present application are as follows by adopting the above technical solutions:

[0034] The contradiction between pressure bearing capacity and magnetic circuit efficiency in the field of super-high pressure electromagnetic valves is ingeniously resolved by adopting the innovative structure design of fiber material reinforcement, the structure optimizes the overall mechanical properties of the electromagnetic valve, so that the magnetic circuit efficiency is guaranteed, and the high strength characteristics of the fiber material can effectively enhance the mechanical properties of the moving parts, thereby improving the performance of the moving parts, effectively overcoming the dynamic response lag bottleneck, and improving the response speed; in the sealing part, the fiber material reinforcement can enhance the overall strength and stability of the sealing part, and the good corrosion resistance of the fiber material can prevent the sealing part from failing due to medium corrosion, completely eliminating the sealing instability hidden danger in the high pressure environment, and guaranteeing the sealing reliability. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 Structure diagram of the fiber material reinforced super-high pressure direct-acting electromagnetic valve of the present application;

[0037] Figure 2 Structure diagram of the sealing tube assembly in the fiber material reinforced super-high pressure direct-acting electromagnetic valve of the present application;

[0038] Figure 3 Enlarged diagram of the sealing assembly in the sealing tube assembly in the fiber material reinforced super-high pressure direct-acting electromagnetic valve of the present application;

[0039] Figure 4 Structure diagram of the moving core assembly in the fiber material reinforced super-high pressure direct-acting electromagnetic valve of the present application;

[0040] Figure 5 Structure diagram of the valve port sealing element in the fiber material reinforced super-high pressure direct-acting electromagnetic valve of the present application;

[0041] Figure 6 Local enlarged diagram of the fiber material reinforced super-high pressure direct-acting electromagnetic valve of the present application.

[0042] Among them:

[0043] 1, valve body; 2, sealing tube assembly; 21, outer sealing groove; 22, outer sealing ring; 23, lower sealing tube; 24, middle sealing tube; 25, upper sealing tube; 26, sealing assembly; 261, sealing groove; 262, sealing gasket; 263, tip sealing surface; 3, winding body; 4, movable core assembly; 41, thimble limiting ring; 42, valve port sealing thimble; 43, sealing spring; 44, return spring; 5, valve port sealing piece; 51, main valve port; 52, air inlet groove; 6, electromagnetic coil; 7, magnetically permeable shell; 8, fixed nut; 9, air inlet; 10, air outlet; 11, inner sealing groove; 12, inner sealing ring. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0045] Reference Figures 1 to 3 A fiber-reinforced super-high-pressure direct-acting electromagnetic valve, comprising:

[0046] The sealing tube assembly 2, as the core pressure-bearing component of the electromagnetic valve, is rigidly and sealingly connected to the upper end of the valve body 1 and extends to the inner cavity of the valve body 1 to form a closed guide sleeve. The winding body 3 is wound on the outer side of the sealing tube assembly 2 by carbon fiber large tension wet winding. In this way, the strength and sealing performance of the sealing tube assembly 2 are both high, and it can be easily used under super-high pressure conditions, significantly improving the axial compressive strength and radial deformation resistance of the sealing tube assembly 2, so that it can withstand the extreme load generated by the super-high pressure fluid medium.

[0047] The sealing tube assembly 2 can be divided into an upper sealing tube 25 assembly, a middle sealing tube 24 assembly, and a lower sealing tube 23 assembly. The materials of the upper sealing tube 25 assembly and the lower sealing tube 23 assembly are magnetically permeable materials, and a sealing combination is arranged between the lower sealing tube 23 assembly and the middle sealing tube 24 assembly. The sealing combination is composed of a sealing groove 261, a sealing gasket 262, and a tip sealing surface 263. The sealing combination makes the tip sealing surface 263 extrude the sealing gasket 262 and the sealing groove 261 to form a seal through threads.

[0048] Reference Figure 1 and Figure 4 :

[0049] The movable iron core assembly 4 includes a needle limiting ring 41, a valve port sealing needle 42, a sealing spring 43, and a reset spring 44. The movable iron core assembly 4 is arranged in the sealing pipe assembly 2. The movable iron core assembly 4 has a stepped shaft structure. The outer edge of the upper section of the movable iron core assembly 4 is in precise sliding fit with the inner wall of the sealing pipe assembly 2. The middle section of the movable iron core assembly 4 is provided with an annular groove for mounting the reset spring 44. The lower section of the movable iron core assembly 4 has a tapered end surface which constitutes a dynamic sealing pair with the valve port sealing element 5. The movable iron core assembly 4 is internally provided with a central through hole along the axis, which serves as a magnetic circuit channel of the electromagnetic coil 6 and forms a double-layer magnetic circuit through a built-in non-magnetic spacer sleeve. The movable iron core assembly 4 is arranged below the needle limiting ring 41, and the movable iron core assembly 4 and the needle limiting ring 41 are fixedly connected.

[0050] The valve port sealing needle 42 is arranged above the needle limiting ring 41, and the needle limiting ring 41 and the valve port sealing needle 42 are in sliding fit. The sealing spring 43 is arranged above the valve port sealing needle 42. The sealing spring 43 provides a sealing force when the electromagnetic valve is not powered. The movable iron core assembly 4 is provided with the reset spring 44. The sealing spring 43, the reset spring 44, and the valve port sealing element 5 constitute a sealing balance device. The movable iron core is in abutment with the valve port sealing needle 42 through the valve port sealing element 5. The sealing balance device can reduce the damage of the weight and vibration of the movable iron core to the valve port. The sealing force between the needle limiting ring 41 and the valve port sealing element 5 is always guaranteed, and a good sealing effect is achieved.

[0051] Reference Figure 1 and Figure 5 :

[0052] The valve port sealing element 5 is made of high-performance polyether ether ketone (PEEK) engineering plastic and is injection molded. A plurality of rectangular air inlet grooves 52 are uniformly arranged on the side wall of the sealing element in the circumferential direction. The groove depth and the groove width are optimized through flow field simulation. The air inlet grooves 52 can form stable air inlet vortex when the valve is opened, and can realize buffer pressure reduction through throttling effect during the closing process. The valve port sealing element 5 is press-fitted into the lower end inner hole of the sealing pipe assembly 2 through interference fit. The lower end of the valve port sealing element 5 is provided with an annular positioning step which is in axial limiting position with the sealing step of the inner cavity of the valve body 1.

[0053] Reference Figure 1 :

[0054] The inner side of the valve body 1 is provided with an inner sealing groove 11. The inner side of the inner sealing groove 11 is provided with a sealing ring, which can prevent gas from leaking from the air outlet 10 in the electromagnetic valve to the air inlet 9.

[0055] The electromagnetic coil 6 is a low-power skeleton-free high-thrust potting electromagnetic coil 6. The use of such an electromagnetic coil 6 can significantly improve the maximum opening pressure of the electromagnetic valve as a whole, while keeping the current small and having no noise. The coil is immersed in epoxy resin for vacuum potting, which not only ensures the insulation reliability, but also optimizes the heat dissipation performance through heat-conducting fillers.

[0056] The inner wall of the magnetic conductive shell 7 is provided with a stepped magnetic circuit optimization structure. The upper cylindrical cavity and the movable iron core assembly (4) form a main magnetic flux loop, and the lower tapered transition section and the valve port sealing element 5 constitute a magnetic leakage shielding structure. The surface of the shell is subjected to electrophoretic coating treatment, which not only prevents the electromagnetic valve from rusting in a humid environment, but also enhances the surface magnetic conductivity through the ferromagnetic particles in the coating. The magnetic conductive shell 7 and the sealing tube assembly 2 are laser welded to form an integrated magnetic circuit structure, effectively reducing the magnetic resistance and eliminating assembly gaps, so that the electromagnetic valve can still maintain high magnetic circuit efficiency under super-high pressure working conditions.

[0057] During the operation of the electromagnetic valve, when the medium enters the valve body 1, the gas outlet 10 is first fully filled with fluid medium. At the same time that the electromagnetic coil 6 is connected to the control power supply, the movable iron core assembly 4 generates an axial pulling force under the action of the electromagnetic field, overcoming the elastic force of the return spring 44, and moving upward, while driving the valve port sealing needle 42 to separate from the sealing surface of the main valve port 51. At this time, the gas inlet groove 52 of the valve port sealing element 5 and the main valve port 51 form an annular pressure relief channel, so that the pressure in the sealing cavity is instantaneously released, and the electromagnetic valve is in an open state at this time.

[0058] When the power supply connected to the electromagnetic coil 6 is cut off, the magnetic field of the electromagnetic coil 6 disappears, and the movable iron core assembly 4 moves downward under the elastic restoring force of the return spring 44. The tapered sealing surface of the valve port sealing needle 42 forms a seal with the main valve port 51, cooperating with the sealing spring 43 to build a double-stage sealing structure in the valve port area. At this time, the fluid passage is completely cut off, and the electromagnetic valve switches to a closed state at this time.

[0059] The synergistic effect of the above technical solutions effectively solves the technical contradiction of the super-high pressure electromagnetic valve: the carbon fiber reinforced structure improves the pressure bearing capacity of the equipment, and the optimized magnetic circuit design ensures that the electromagnetic force is simultaneously improved; the double-spring system shortens the dynamic response time, and the double-stage sealing structure improves the reliability of high-pressure sealing. Ultimately, the comprehensive performance of the electromagnetic valve under super-high pressure working conditions is broken through, significantly prolonging the service life of the equipment under harsh working conditions.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fiber-reinforced ultra-high pressure direct-acting solenoid valve, characterized in that, include: Valve body (1); The sealing tube assembly (2) is installed on the upper end of the valve body (1) and extends outward from the valve body (1). The sealing tube assembly (2) includes a lower sealing tube (23), a middle sealing tube (24) and an upper sealing tube (25). The lower sealing tube (23) is connected to the valve body (1), the middle sealing tube (24) is located at the end of the lower sealing tube (23), and the upper sealing tube (25) is located at the end of the middle sealing tube (24). The magnetic housing (7) is sleeved on the outside of the sealing tube assembly (2), and the magnetic housing (7) contacts the upper sealing tube (25) and the lower sealing tube (23) respectively to form a closed magnetic circuit; The winding body (3) is tightly wound around the outer surface of the sealing tube assembly (2); The movable iron core assembly (4) is installed inside the sealing tube assembly (2); The valve port seal (5) is installed below the movable iron core assembly (4); Electromagnetic coil (6) is installed at the end of movable iron core assembly (4). Electromagnetic coil (6) is covered by magnetic shell (7). The two are connected and fit tightly together. The lower end of the movable iron core assembly (4) is provided with a pin limiting ring (41), and the reset spring (44) is provided at the upper end of the movable iron core assembly (4); the pin limiting ring (41) slides with the valve port sealing pin (42) and provides sealing pre-tightening force through the sealing spring (43), forming a sealing balance device that can offset vibration interference. The electromagnetic coil (6) is a frameless coil, and the electromagnetic coil (6) has an insulating layer on the outside.

2. The ultra-high pressure direct-acting solenoid valve reinforced with fiber material according to claim 1, characterized in that: The valve body (1) is provided with an inner sealing groove (11) and an inner sealing ring (12), which are configured to block unexpected leakage between the air inlet (9) and the air outlet (10).

3. The ultra-high pressure direct-acting solenoid valve reinforced with fiber material according to claim 1, characterized in that: The sealing tube assembly (2) also includes a sealing assembly (26). A sealing assembly (26) is provided at the connection between the upper sealing tube (25) and the middle sealing tube (24), and at the connection between the lower sealing tube (23) and the middle sealing tube (24). The sealing assembly (26) includes a sealing groove (261) and a sealing gasket (262) placed in the sealing groove (261). A pointed sealing surface (263) is provided at the center of the sealing gasket (262).

4. The ultra-high pressure direct-acting solenoid valve reinforced with fiber material according to claim 1, characterized in that: The winding body (3) is a carbon fiber high-tension wet winding layer, which can improve the pressure bearing capacity of the sealing pipe assembly (2) to ultra-high pressure conditions.

5. The ultra-high pressure direct-acting solenoid valve reinforced with fiber material according to claim 2, characterized in that: The valve port seal (5) is made of polyetheretherketone material, and an air inlet groove (52) is opened on its side wall. The main valve port (51) cooperates with the valve port sealing pin (42) at the lower end of the movable iron core assembly (4) to control the air flow.

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