Light quick-response high-temperature-resistant redundant sealing electromagnetic valve

Abstract

The invention provides a light quick-response high-temperature-resistant redundant sealing electromagnetic valve. The light quick-response high-temperature-resistant redundant sealing electromagnetic valve comprises a coil assembly, a valve element assembly, a spring, a spring seat and a valve seat. An inner cavity flow channel is formed in the coil assembly in the axial direction, and a plurality of electromagnetic valve single bodies connected in series are arranged in the inner cavity flow channel. Each electromagnetic valve single body comprises a valve element assembly, a spring seat and a valve seat. A valve element assembly sliding in the axial direction is arranged between the spring seat and the valve seat, a spring is arranged between the valve element assembly and the spring seat, and the valve element assembly and the corresponding valve seat form a sealing pair. When the coil assembly is powered on, the valve element assembly, the coil assembly and the spring seat form a magnetic loop, and the valve element assembly overcomes the elastic force of the spring and moves towards one side of the spring seat. According to the scheme that one coil winding is adopted to control the two sets of relatively independent valve element assemblies in the inner cavity of the electromagnetic valve, the weight of the electromagnetic valve is far lighter than the sum of two single valves, a control circuit is simple, the reliability of the control circuit is improved, and on the other hand, the leakage risk of the electromagnetic valve is greatly reduced by only adopting one coil winding.

Description

Technical Field

[0001] The invention relates to the field of solenoid valve structures, and in particular to a lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve. Background Art

[0002] The solenoid valve is an important part of the propulsion system. At present, the requirements of the propulsion system for high-pressure solenoid valves have been greatly improved compared with the past. The propulsion system requires the solenoid valve to have methylhydrazine and nitrogen tetroxide as the working medium, a weight requirement of no more than 180g, an operating temperature requirement of -40 to 80°C, and a long service life: 4 years of storage after delivery for final assembly, 2 years of final assembly testing, and no less than 10 years on orbit. Traditional solenoid valves have a low operating temperature, insufficient sealing reliability, and a lifespan that cannot meet such stringent requirements, and cannot be used in this propulsion system. Summary of the invention

[0003] In view of the defects in the prior art, an object of the present invention is to provide a lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve.

[0004] A lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve provided by the present invention comprises: a coil assembly, a valve core assembly, a spring, a spring seat and a valve seat;

[0005] An inner cavity flow channel is arranged in the coil assembly along the axial direction, and a plurality of electromagnetic valve monomers connected in series are arranged in the inner cavity flow channel;

[0006] The solenoid valve monomer comprises: a valve core assembly, a spring seat and a valve seat;

[0007] A valve core assembly that slides in the axial direction is arranged between the spring seat and the valve seat, a spring is arranged between the valve core assembly and the spring seat, and the valve core assembly and the corresponding valve seat form a sealing pair;

[0008] When the coil assembly is energized, the valve core assembly, the coil assembly and the spring seat form a magnetic circuit, and the valve core assembly overcomes the elastic force of the spring and moves toward the spring seat.

[0009] Preferably, the valve core assembly, the spring, the valve seat and the spring seat are arranged inside the solenoid valve housing, the coil assembly is installed on the circumference of the solenoid valve housing, and a transfer nozzle is installed at one end of the solenoid valve housing.

[0010] Preferably, a throttle ring is provided inside the adapter nozzle, and the throttle ring is fixed by a locking nut.

[0011] Preferably, a filter assembly is provided between the adapter nozzle and the solenoid valve housing.

[0012] Preferably, the spring seat includes an upper spring seat and a lower spring seat, the valve seat includes an upper valve seat and a lower valve seat, the valve core assembly includes an independently arranged first valve core assembly and a second valve core assembly, the first valve core assembly is located between the upper spring seat and the upper valve seat, the second valve core assembly is located between the lower spring seat and the lower valve seat, and springs are arranged between the first valve core assembly and the upper spring seat and between the second valve core assembly and the lower spring seat.

[0013] Preferably, the upper spring seat is located at one end close to the adapter nozzle, the lower valve seat is located at one end away from the adapter nozzle, and the lower spring seat is connected to the upper valve seat.

[0014] Preferably, the sealing surface between the valve seat and the corresponding valve core assembly is made of metal cutting edge, and the sealing surface between the valve core assembly and the corresponding valve seat is made of fluoroplastic material.

[0015] Preferably, two ends of the coil assembly are welded to the lower valve seat and the adapter nozzle.

[0016] Preferably, the valve core assembly is made of soft magnetic alloy material.

[0017] Preferably, a test port channel is connected between the second valve core assembly and the lower valve seat, and the test port channel is inclined;

[0018] A test port screw is arranged outside the test port channel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Lightweight: This application adopts a solution of one coil winding controlling two relatively independent valve core components in the inner cavity of the solenoid valve, which is much lighter than the sum of two single valves, and the control circuit is simple, which improves the reliability of the control circuit. On the other hand, the use of only one coil winding also greatly reduces the leakage risk of the solenoid valve;

[0021] At the same time, the present application obliquely arranges the test port channel between the second valve core assembly and the lower valve seat. Compared with the conventional test port channel extended at the bottom of the lower valve seat, the present application shortens the length and thus reduces the weight.

[0022] After optimization, the weight of the solenoid valve is only 75% of the weight of the same type of double-seat solenoid valve, which can reduce the weight of the propulsion subsystem by about 4kg.

[0023] 2. Fast response: This application adopts a local special-shaped magnetic conductive structure of the shell and an appropriate magnetic isolation structure design, so that the solenoid valve load opening time and closing time are both within 10ms, thereby achieving the requirement of fast response.

[0024] 3. High temperature resistance: This application adopts a fully welded structure to replace the O-ring sealing structure with poor tolerance to high temperature oxidant environment, thereby achieving the high temperature resistance requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of the solenoid valve;

[0027] As shown in the figure:

[0028] DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0030] Example 1

[0031] like Figure 1 As shown, this embodiment includes: a coil assembly 1, a valve core assembly 2, a filter assembly 3, a spring 4, an adapter nozzle 6, a test port screw 7, a throttle ring 8, a locking nut 9, a spring seat 10 and a valve seat; the valve seat includes a lower valve seat 5 and an upper valve seat 11. An inner cavity flow channel is arranged axially in the coil assembly 1, and a plurality of electromagnetic valve monomers in series are arranged in the inner cavity flow channel. The electromagnetic valve monomer includes: a valve core assembly 2, a spring seat 10 and a valve seat; a valve core assembly 2 sliding along the axial direction is arranged between the spring seat 10 and the valve seat, a spring 4 is arranged between the valve core assembly 2 and the spring seat 10, and the valve core assembly 2 and the corresponding valve seat form a sealing pair; when the coil assembly 1 is energized, the valve core assembly 2, the coil assembly 1 and the spring seat 10 form a magnetic circuit, and the valve core assembly 2 overcomes the elastic force of the spring 4 and moves toward the side of the spring seat 10. The valve core assembly 2, the spring 4, the valve seat and the spring seat 10 are arranged inside the electromagnetic valve housing, the coil assembly 1 is installed on the peripheral side of the electromagnetic valve housing, and the adapter nozzle 6 is installed at one end of the electromagnetic valve housing. A throttle ring 8 is arranged inside the adapter nozzle 6, and the throttle ring 8 is fixed by a locking nut 9. A filter assembly 3 is arranged between the adapter nozzle 6 and the solenoid valve housing.

[0032] In one embodiment, the spring seat 10 includes an upper spring seat and a lower spring seat, the valve seat includes an upper valve seat 11 and a lower valve seat 5, the valve core assembly 2 includes a first valve core assembly and a second valve core assembly that are independently arranged, the first valve core assembly is located between the upper spring seat and the upper valve seat 11, the second valve core assembly is located between the lower spring seat and the lower valve seat 5, and a spring 4 is arranged between the first valve core assembly and the upper spring seat and between the second valve core assembly and the lower spring seat. The upper spring seat is located at one end close to the adapter nozzle 6, the lower valve seat 5 is located at one end away from the adapter nozzle 6, and the lower spring seat is connected to the upper valve seat 11. The two ends of the coil assembly 1 are welded to connect the lower valve seat 5 and the adapter nozzle 6.

[0033] In one embodiment, the sealing surface between the valve seat and the corresponding valve core assembly 2 is made of metal cutting edge, and the sealing surface between the valve core assembly 2 and the corresponding valve seat is made of fluoroplastic material.

[0034] In one embodiment, the valve core component 2 is made of soft magnetic alloy material.

[0035] In one embodiment, a test port channel is connected between the second valve core assembly and the lower valve seat 5 , the test port channel is inclined, and a test port screw 7 is disposed outside the test port channel.

[0036] Example 2

[0037] Example 2 is a preferred example of Example 1.

[0038] like Figure 1 As shown, this embodiment includes: coil assembly 1, valve core assembly 2, filter assembly 3, spring 4, lower valve seat 5, adapter nozzle 6, test port screw 7, throttle ring 8, locking nut 9 and spring seat 10. The inner cavity flow channel has two relatively independent valve core assemblies 2 and valve seats, forming two sealing pairs arranged in series. Both valve core assemblies 2 use spring 4 as a reset mechanism. In this embodiment, when the coil assembly 1 is not energized, the two valve core assemblies 2 including the armature are pressed against their respective corresponding valve seats by the medium pressure and the pre-tightening force of the spring 4, forming two sealing pairs in series on the inner cavity flow channel of the solenoid valve. The medium is located in the cavity of the valve core assembly 2 on the side facing away from the valve seat. When a certain voltage is applied to the coil assembly 1, the two valve core assemblies 2 made of soft magnetic alloy material, the coil assembly 1, and the spring seat 10 form a magnetic circuit, which generates axial suction on the valve core assembly 2, attracting the upper and lower valve core assemblies 2 to move in the direction of overcoming the elastic force of the spring 4 at the same time, until the electromagnetic suction overcomes the spring force and the medium pressure, so that the solenoid valve is fully opened. As long as the coil assembly 1 is continuously energized, the solenoid valve will remain in the open state until the electrical signal is cut off, and the electromagnetic suction drops to a level that is insufficient to overcome the combined force of the spring force and the medium pressure, the valve core assembly 2 resets, and the valve closes. The two valve core assemblies 2 of the solenoid valve are independently opened and closed under the action of the same coil assembly 1, without interfering with each other.

[0039] The throttle ring 8 and the locking nut are installed inside the adapter nozzle 6. The throttle ring 8 itself is a device known in the art for adjusting the flow rate and flow resistance of the medium. This embodiment is used to adjust the flow rate and flow resistance of the upstream medium. The cleanliness of the medium is guaranteed by the filter assembly 3. The fixation of the throttle ring 8 is achieved by the locking nut 9. During assembly, the test port screw 7 needs to be opened when testing the sealing performance of the sealing pair of the second valve core assembly 2. Helium is introduced from the test port and tested from the small hole of the lower valve seat 5. The leakage of the solenoid valve is guaranteed by the welding of the coil assembly 1 and the adapter nozzle 6 and the welding of the coil assembly 1 and the lower valve seat 5.

[0040] This embodiment uses a coil winding to control two relatively independent valve core components 2 in the inner cavity of the solenoid valve. The function is similar to two single valves connected in series, but the weight is much lighter than the sum of the two single valves, and the control circuit is simple. This embodiment improves the reliability of the control circuit on the one hand, and greatly reduces the leakage of the solenoid valve on the other hand. The two sealing pairs of the solenoid valve both adopt a "hard to soft" sealing structure: the valve seat sealing surface is a metal cutting edge, and the sealing surface of the valve core component 2 is a mechanically crimped fluoroplastic, which can ensure reliable sealing during the mission cycle.

[0041] This embodiment eliminates the structure in which the traditional aluminum alloy gasket serves as both a sealing gasket and an adjusting gasket, and adopts a stainless steel gasket instead, thereby avoiding the situation in which the solenoid valve is affected by the chemical reaction between the aluminum alloy and the oxidant during the mission cycle and affecting the product performance; at the same time, the non-metallic sealing material is also improved from the traditional polyperfluoroethylene propylene to a denser and more high-temperature resistant modified fluoroplastic rod, and the O-ring sealing structure with poor tolerance to high-temperature oxidant environment is eliminated and a fully welded structure is adopted.

[0042] The electrical interface of this embodiment is changed from a socket to a direct wire-swinging form. In order to shorten the product length and reduce the weight, the test port channel is moved up from the bottom to between the second valve core assembly and the lower valve seat 5. After moving up, in order to prevent the small hole of the test port from affecting the movement of the movable part, an inclined hole is used. After optimization, the weight of the solenoid valve is only 75% of the weight of the same type of double-valve seat solenoid valve, which can reduce the weight of the propulsion subsystem by about 4kg.

[0043] The solenoid valve housing of this embodiment adopts a partially shaped magnetic conductive structure and an appropriate magnetic isolation structure design, so that the load opening time and closing time of the solenoid valve are both within 10ms. That is, at the saturation point of the magnetic induction intensity, the size of the parts increases slightly, and the bottom of the coil assembly 1 is not a smooth cylinder, but presents anisotropy.

[0044] The inlet end of this embodiment adopts a split structure, which is divided into a transfer nozzle 6 and a solenoid valve housing assembly, and the filter assembly 3 is pressed between the two. This structure not only improves the process performance of the product and reduces the difficulty of inspection, but also avoids the hidden danger of trace metal chips falling into the inner cavity of the solenoid valve and affecting the working performance of the solenoid valve when installing the adjusting flow orifice plate.

[0045] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve, characterized in that: include: Coil assembly (1), valve core assembly (2), spring (4), spring seat (10) and valve seat; An inner cavity flow channel is arranged in the coil assembly (1) along the axial direction, and a plurality of electromagnetic valve monomers connected in series are arranged in the inner cavity flow channel; The solenoid valve monomer comprises: a valve core component (2), a spring seat (10) and a valve seat; A valve core assembly (2) is arranged between the spring seat (10) and the valve seat and slides in the axial direction, a spring (4) is arranged between the valve core assembly (2) and the spring seat (10), and the valve core assembly (2) and the corresponding valve seat form a sealing pair; When the coil assembly (1) is energized, the valve core assembly (2), the coil assembly (1) and the spring seat (10) form a magnetic circuit, and the valve core assembly (2) overcomes the elastic force of the spring (4) and moves toward the spring seat (10).

2. According to claim 1, the lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve is characterized by: The valve core assembly (2), the spring (4), the valve seat and the spring seat (10) are arranged inside the solenoid valve housing, the coil assembly (1) is installed on the circumference of the solenoid valve housing, and a transfer nozzle (6) is installed at one end of the solenoid valve housing.

3. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 2 is characterized by: A throttle ring (8) is arranged inside the adapter nozzle (6), and the throttle ring (8) is fixed by a locking nut (9).

4. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 2 is characterized by: A filter assembly (3) is provided between the adapter nozzle (6) and the solenoid valve housing.

5. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 2 is characterized by: The spring seat (10) includes an upper spring seat and a lower spring seat, the valve seat includes an upper valve seat (11) and a lower valve seat (5), the valve core assembly (2) includes a first valve core assembly and a second valve core assembly which are independently arranged, the first valve core assembly is located between the upper spring seat and the upper valve seat (11), the second valve core assembly is located between the lower spring seat and the lower valve seat (5), and a spring (4) is arranged between the first valve core assembly and the upper spring seat and between the second valve core assembly and the lower spring seat.

6. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 5 is characterized by: The upper spring seat is located at one end close to the transfer nozzle (6), the lower valve seat (5) is located at one end away from the transfer nozzle (6), and the lower spring seat is connected to the upper valve seat (11).

7. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 1 is characterized by: The sealing surface between the valve seat and the corresponding valve core component (2) is made of metal cutting edge, the sealing surface between the valve core component (2) and the corresponding valve seat is made of fluoroplastic material, and the valve core component (2) is made of soft magnetic alloy material.

8. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 5 is characterized by: The two ends of the coil assembly (1) are welded to a lower valve seat (5) and a transfer nozzle (6).

9. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 1, characterized in that: The solenoid valve housing adopts a partially special-shaped magnetic conductive structure.

10. The lightweight, fast-response, high-temperature-resistant redundant sealed solenoid valve according to claim 5, characterized in that: A test port channel is connected between the second valve core assembly and the lower valve seat (5), and the test port channel is arranged in an inclined manner; A test port screw (7) is arranged outside the test port channel.

Images