Iodine working medium high-pressure electromagnetic valve with reed structure

Abstract

The iodine working medium high-pressure electromagnetic valve of the reed structure comprises an inlet assembly, a coil assembly, a valve element assembly and a valve seat which are sequentially connected from left to right in the axial direction, and the coil assembly is arranged to be capable of controlling the valve element assembly to do reciprocating motion through power on and off so that the valve element assembly can control on and off of a valve runner; wherein the valve element assembly comprises an outer armature, an inner armature, a reed, a valve element, an inner backing ring, an outer backing ring and a pressing ring, the inner armature, the valve element and the pressing ring are coaxially arranged in sequence from left to right, and the outer backing ring and the outer armature are arranged outside the inner armature in sequence from inside to outside; the inner armature is connected and clamped by reeds arranged at the two ends of the inner armature, so that the inner armature does not have a sliding fit surface during axial movement; the valve element is made of polytrifluorochloroethylene, and it is guaranteed that the valve element is not corroded in the iodine working medium state. The electromagnetic valve is reasonable in structure, convenient to machine and assemble, high in corrosion resistance and long in service life, and the production qualification rate is increased while miniaturization and light weight are achieved.

Description

Technical Field

[0001] This invention relates to the field of high-pressure solenoid valve technology, specifically to a high-pressure solenoid valve with a reed structure and iodine working fluid. Background Technology

[0002] Small, long-life solenoid valves are a crucial component of space propulsion systems. Their working medium is high-pressure iodine propellant. Since valve failure in propulsion systems can lead to serious consequences, these valves must be capable of long-term, stable operation. Specific design requirements necessitate an operational lifespan of over 10 years and a high cumulative number of operations (≥1×10⁻⁶). 5 (Second time), high sealing requirements (internal and external leakage rates ≤1×10⁻⁶ at both low pressure 0.5MPa and high pressure 35MPa). -7 Pa·m 3 ( / s), and the valve weight requirement is less than 80g.

[0003] The difference between miniature, long-life solenoid valves and existing solenoid valves lies in the fact that existing solenoid valves have fewer operating cycles, lower leakage rate requirements, and cannot be used with iodine as the working medium. Furthermore, existing solenoid valves are too heavy to meet current design requirements. Currently, there are no reliable, long-life, miniature solenoid valves for iodine working media on the market. Therefore, there is an urgent need to provide a high-pressure solenoid valve for iodine working media to solve these problems. Summary of the Invention

[0004] 1. The technical problem that the invention aims to solve: The purpose of this invention is to provide a high-pressure solenoid valve with iodine working fluid and a reed structure. This solenoid valve has a reasonable structure, is easy to process and assemble, has a long service life, and improves the production qualification rate while achieving miniaturization and weight reduction.

[0005] 2. Technical Solution: To achieve the above objectives, the technical solution provided by the present invention is as follows: a high-pressure solenoid valve for iodine working fluid with a reed structure, the solenoid valve comprising an inlet assembly, a coil assembly, a valve core assembly, and a valve seat connected sequentially from left to right along the axial direction; the coil assembly is configured to control the reciprocating motion of the valve core assembly by switching on and off power, so that the valve core assembly can control the opening and closing of the valve flow channel; wherein, the valve core assembly comprises an outer armature, an inner armature, a valve core, a clamping ring, an outer washer ring, an inner washer ring one, an inner washer ring two, and a reed; the inner armature, the valve core, and the clamping ring are coaxially arranged sequentially from left to right; the outer armature, the outer washer ring, the inner washer ring one, and the inner washer ring two are arranged sequentially from the inside to the outside of the inner armature; the inner armature is connected and clamped by the reeds arranged at both ends thereon, so that the inner armature has no sliding mating surface when moving axially.

[0006] Preferably, the reed has a plurality of S-shaped ribs.

[0007] Preferably, the inlet component is welded to the left end of the coil component, a medium entry channel is formed on the inlet component for the flow of iodine working fluid, and a filter screen is provided at the connection between the channel and the coil component.

[0008] Preferably, the valve seat is welded to the right end of the coil assembly, and a cutting edge structure is formed on the valve seat, which cooperates with the valve core to form a sealing pair.

[0009] Preferably, the valve seat also forms a flow channel for the medium to flow out of the valve, for the flow of iodine working fluid.

[0010] Preferably, the coil assembly includes a housing component, a coil, and a cover. A winding chamber is formed on the housing component. The coil is a single-sided single-coil structure and is wound inside the winding chamber of the housing component. The coil is capable of providing a positive helical current for opening the valve and heating the inside of the valve chamber. The coil is an open coil. The cover is provided outside the coil and the housing component.

[0011] Preferably, the housing component is formed by welding sections of soft magnetic material and stainless steel material.

[0012] Preferably, the working pressure of the gaseous iodine working medium inside the housing component is 35 MPa.

[0013] Preferably, the valve core assembly is aligned by the cooperation between the outer armature and the inner wall of the housing component, which drives the movement of the spring in the valve core assembly to prevent leakage of the gaseous iodine working medium inside the valve body when the valve is normally closed, thereby ensuring the stable delivery of the gaseous iodine working medium.

[0014] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: The internal armature of this invention is supported by a spring-loaded suspension, eliminating the need for sliding contact surfaces and completely preventing jamming or failure due to wear. Testing has shown that the cumulative number of operations can reach 1×10⁻⁶. 5 More than once, meeting the requirements for an operating life of more than 10 years.

[0015] The solenoid valve of this invention boasts advantages in miniaturization and lightweight design. By integrating the valve core and spring within the internal armature, the component layout is optimized, structural redundancy is reduced, and the overall valve weight is less than 80g, perfectly meeting the lightweight requirements of space propulsion systems. The valve core assembly of this invention employs a modular design, reducing the number of parts and assembly steps, lowering the difficulty of controlling excess material during processing, and significantly improving the production yield. The coil of this invention serves both to drive the valve opening and to heat the valve chamber, preventing the condensation of gaseous iodine and eliminating the need for additional heating components, further simplifying the structure.

[0016] The valve core of this invention is made of polychlorotrifluoroethylene, which has excellent resistance to iodine corrosion; the valve seat cutting edge structure and the valve core form a reliable sealing pair, and combined with neutral control, the leakage rate can be stably controlled at ≤1×10 under high and low pressure conditions. -7 Pa·m 3 / s, which has advantages in high corrosion resistance and sealing performance compared to existing technologies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the coil assembly structure of the present invention; Figure 3 This is a schematic diagram of the valve core assembly structure of the present invention; Figure 4 This is a schematic diagram of the reed structure of the present invention.

[0018] Figure label: 1. Coil assembly; 2. Valve core assembly; 3. Inlet assembly; 4. Valve seat; 11. Housing component; 12. Coil; 13. Cover; 21. Outer armature; 22. Inner armature; 23. Valve core; 24. Pressure ring; 25. Outer washer ring; 26. Inner washer ring one; 27. Inner washer ring two; 28. Spring. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "page," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] It should be noted that the structures not described in this invention are not related to the design points and improvement directions of this invention, and are the same as or can be implemented using existing technologies, so they will not be elaborated here. Example

[0024] See attached document Figures 1-4 A high-pressure solenoid valve for iodine working fluid with a reed structure is disclosed. The solenoid valve comprises, from left to right and axially, an inlet assembly 3, a coil assembly 1, a valve core assembly 2, and a valve seat 4. The coil assembly 1 is configured to control the reciprocating motion of the valve core assembly 2 by switching it on and off, thereby enabling the valve core assembly 2 to control the opening and closing of the valve flow channel. like Figure 3 As shown, the valve core assembly 2 includes an outer armature 21, an inner armature 22, a valve core 23, a clamping ring 24, an outer washer ring 25, an inner washer ring one 26, an inner washer ring two 27, and a spring 28. The inner armature 22, the valve core 23, and the clamping ring 24 are arranged coaxially from left to right. The outer armature 22 is provided with the outer armature 21, the outer washer ring 25, the inner washer ring one 26, and the inner washer ring two 27 from the inside to the outside. The inner armature 22 is connected and clamped by the springs 28 arranged at both ends of it, so that the inner armature 22 has no sliding mating surface when it moves axially.

[0025] Through the above technical solution, the internal armature 22 of the solenoid valve is supported by the spring 28, which prevents the internal armature 22 from rubbing against the inner wall of the housing during movement. This avoids the internal armature 22 from jamming or even failing due to surface wear. The final test results prove that it can achieve 1×10 5More than one action. At the same time, by placing the valve core 23 and the spring 28 in the armature in the structural design, the size and weight of the valve can be reduced, ultimately making the product weight less than 80g, meeting the requirements of long service life and miniaturization.

[0026] like Figure 4 As shown, in this embodiment, the spring 28 preferably has multiple S-shaped ribs. The S-shaped rib structure increases the deformability of the spring 28 and reduces the deformation stress of each rib, allowing the spring 28 to achieve a service life of tens of thousands of cycles.

[0027] The inlet component 3 is welded to the left end of the coil assembly 1. A flow channel for medium entry is formed on the inlet component 3, and a filter screen is provided at the connection between the flow channel and the coil assembly 1. The valve seat 4 is welded to the right end of the coil assembly 1. A cutting edge structure is formed on the valve seat 4, and it cooperates with the valve core 23 to form a sealing pair. Furthermore, the valve seat 4 also has a flow channel for medium to flow out of the valve. Thus, the medium enters the valve from the inlet component 3 and flows out of the valve from the valve seat 4.

[0028] In this embodiment, the coil assembly 1 includes a housing component 11, a coil 12, and a cover 13. The coil 12 has a single-sided single-coil structure and is sleeved on the housing component 11 and is configured to provide a positive spiral current for opening the valve and heating the inside of the valve chamber. The cover 13 covers the outside of the coil 12 and the housing component 11.

[0029] Meanwhile, a winding chamber is formed on the housing component 11, and a coil 12 is wound inside the winding chamber. The coil 12 is an open coil used to control the opening of the valve and heat the inside of the valve chamber.

[0030] Thus, when the coil in coil assembly 1 is energized, the coil generates an induced magnetic field, which, together with the soft magnetic material housing component 11 (which is segmented and welded from soft magnetic material and stainless steel), forms a magnetic induction loop. This induced magnetic field causes the inner armature 22 to experience a magnetic force pointing towards the inlet assembly 3, and this force is greater than the medium pressure and the preload of the spring 28. Therefore, the inner armature 22 moves towards the valve inlet assembly 3 until the valve is fully open. After de-energization, the induced magnetic field generated by the coil gradually weakens until it disappears, and the inner armature 22, under the action of the medium pressure and the preload of the spring 28, moves towards the valve seat 4 until the valve is fully closed.

[0031] In addition, the valve core assembly 2 needs to be precisely controlled during the opening and closing process to ensure the stable delivery of gaseous iodine working fluid. The outer armature 21 and the inner wall of the housing component 11 cooperate to drive the movement of the spring 28 in the valve core assembly 2 to ensure its alignment, so as to prevent the gaseous iodine working fluid inside the valve body from leaking when the valve is normally closed.

[0032] In summary, this invention extends the valve's service life by suspending the inner armature 22, eliminating sliding contact surfaces, and preventing failures caused by wear of the inner armature 22. Furthermore, by incorporating the spring 28 and valve core 23 within the inner armature 22, this invention reduces the valve's size and weight without compromising product performance, achieving miniaturization of the solenoid valve. In addition, this invention optimizes the structure of the valve core assembly 2, reducing the difficulty of controlling foreign matter during manufacturing and improving the production yield.

[0033] Weight test: The overall mass of the solenoid valve was between 65g and 71g when weighed by an electronic balance, with an average mass of 68g, all of which were less than 80g.

[0034] Life test: Test conditions: 100 solenoid valves were selected as test specimens, and high-purity nitrogen or helium gas with the same maximum working pressure (35MPa) was loaded into the test specimens; the test environment temperature was set to room temperature, and the medium pressure and temperature were kept stable during the test.

[0035] Test Procedure: The solenoid valve was controlled to perform cyclic on / off operations, accumulating 100,000 switching actions. After the test, a preliminary inspection of the specimen's appearance and basic condition was conducted. Once no obvious structural damage was confirmed, the work order record was filled out, and the specimen was delivered to the next process according to the established procedure. For the specimen that completed the life test, three key performance tests were further conducted: coil 12 resistance check; valve internal / external leakage rate check; coil 12 opening voltage check. The tests showed that all three performance indicators met the design requirements of this invention, and the test results were qualified.

[0036] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A high-pressure solenoid valve for iodine working fluid with a reed structure, characterized in that: The solenoid valve includes an inlet assembly (3), a coil assembly (1), a valve core assembly (2), and a valve seat (4) connected sequentially from left to right along the axial direction. The coil assembly (1) is configured to control the reciprocating motion of the valve core assembly (2) by switching the power on and off, so that the valve core assembly (2) can control the opening and closing of the valve flow channel. The valve core assembly (2) includes an outer armature (21), an inner armature (22), a valve core (23), a clamping ring (24), an outer gasket (25), and an inner gasket. (26), inner pad ring two (27) and spring (28), the inner armature (22), valve core (23) and clamping ring (24) are arranged coaxially from left to right, and the outer armature (21), outer pad ring (25), inner pad ring one (26) and inner pad ring two (27) are arranged from the inside to the outside of the inner armature (22); the inner armature (22) is connected and clamped by the spring (28) at both ends of it, so that the inner armature (22) has no sliding mating surface when it moves axially.

2. The high-pressure solenoid valve with a reed structure for iodine working fluid according to claim 1 is characterized in that: The reed (28) is provided with several S-shaped rib structures.

3. The iodine-based high-pressure solenoid valve with a reed structure according to claim 1, characterized in that: The inlet component (3) is welded to the left end of the coil component (1). A medium entry channel is formed on the inlet component (3) for the flow of iodine working fluid. A filter screen is provided at the connection between the channel and the coil component (1).

4. The iodine-based high-pressure solenoid valve with a reed structure according to claim 1, characterized in that: The valve seat (4) is welded to the right end of the coil assembly (1). The valve seat (4) has a cutting edge structure and cooperates with the valve core (23) to form a sealing pair.

5. The iodine-based high-pressure solenoid valve with a reed structure according to claim 4, characterized in that: The valve seat (4) also forms a flow channel for the medium to flow out of the valve, for the flow of iodine working fluid.

6. The iodine-based high-pressure solenoid valve with a reed structure according to claim 1, characterized in that: The coil assembly (1) includes a housing component (11), a coil (12), and a cover (13). A winding chamber is formed on the housing component (11). The coil (12) is a single-sided single-coil structure and is wound inside the winding chamber of the housing component (11). The coil (12) can provide a positive spiral current for opening the valve and heating the inside of the valve chamber. The coil (12) is an open coil. The cover (13) covers the outside of the coil (12) and the housing component (11).

7. The iodine-based high-pressure solenoid valve with a reed structure according to claim 6, characterized in that: The housing component (11) is formed by welding soft magnetic material and stainless steel material in sections.

8. A high-pressure solenoid valve with a reed structure for iodine working fluid according to any one of claims 1-7, characterized in that: The working pressure of the gaseous iodine working medium inside the shell component (11) is 35 MPa.

9. A high-pressure solenoid valve with a reed structure for iodine working fluid according to claim 8, characterized in that: The valve core assembly (2) is driven by the cooperation between the outer armature (21) and the inner wall of the housing component (11) to ensure its centering by moving the spring (28) in the valve core assembly (2), so as to prevent the gaseous iodine working medium inside the valve body from leaking when the valve is normally closed, thereby ensuring the stable delivery of the gaseous iodine working medium.

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