Large-caliber low-temperature exhaust electromagnetic valve

Abstract

The invention discloses a large-diameter low-temperature exhaust electromagnetic valve, and relates to the technical field of electromagnetic valves. According to the large-diameter low-temperature exhaust electromagnetic valve, a valve deck is installed at the top of a main valve body through a bolt assembly, a main valve is arranged in the main valve body, an auxiliary valve is arranged at the top of the valve deck, an auxiliary valve is arranged in the auxiliary valve body, and the auxiliary valve body is provided with an electromagnetic assembly through a jacket nut; an air hole is formed in the surface of the valve cover, the main valve body communicates with the auxiliary valve body through an air leakage hole, the bottom of the auxiliary valve is movably connected with the surface of the valve cover, a first air leakage hole communicates with a second air leakage hole, a gap between the main valve and the valve body forms an air supplementing channel, and the surface of the main valve is plated with hard chromium, so that the frictional wear and clamping stagnation risks between the main valve and the valve body are reduced; the auxiliary valve and the armature are designed in a split mode, assembling is prevented from being affected by coaxiality deviation of integrated machining, limiting is achieved by limiting the movement stroke of the auxiliary valve to be smaller than the movement stroke of the armature, movement loss of the armature is reduced, and the service life of the electromagnet is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and in particular to a large-caliber low-temperature exhaust solenoid valve. Background Art

[0002] Liquid rocket cryogenic exhaust valves often utilize a pneumatic valve + solenoid valve combination to vent the tank. In related technologies, an additional air source is required to provide the forced opening force for the pneumatic valve. The solenoid valve acts as a control element, controlling the on / off flow of the air source pressure, which in turn controls the opening and closing of the pneumatic valve to rapidly vent the tank.

[0003] The pneumatic valve + solenoid valve combination already adds weight to the entire system. Furthermore, the additional air source required to power the pneumatic valve further increases the weight of the entire system. Furthermore, the solenoid valves used in this combination are often two-position, three-way solenoid valves. After the tank is vented, the pneumatic valve + solenoid valve combination closes, and the gas in the pneumatic valve cylinder is discharged into the atmosphere through the solenoid valve, resulting in a waste of resources and even environmental pollution. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a large-caliber low-temperature exhaust solenoid valve, which can reduce the weight of traditional exhaust valves while achieving resource conservation and environmental protection.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a large-caliber, low-temperature exhaust solenoid valve, comprising a main valve body and a valve cover, the valve cover being mounted on the top of the main valve body through a bolt assembly, a main valve being provided inside the main valve body, and an electromagnetic assembly being installed on the top of the valve cover; an auxiliary valve body being provided on the top of the valve cover, an auxiliary valve being provided inside the auxiliary valve body, and an electromagnetic assembly being provided on the auxiliary valve body through an outer sleeve nut; an air hole being provided on the surface of the valve cover, the main valve body being connected to the auxiliary valve body through the air hole, and the bottom of the auxiliary valve being movably connected to the surface of the valve cover; a first air leaking hole being provided inside the valve cover, a second air leaking hole being provided inside the main valve body, and the first air leaking hole being connected to the second air leaking hole.

[0006] Furthermore, the surface of the main valve is connected to the inner wall of the main valve body, the interior of the main valve is connected to a main spring, and the end of the main spring away from the main valve is movably connected to the top of the inner wall of the main valve body; the bottom of the main valve is fixedly connected to a first sealing gasket, and the surface of the first sealing gasket is movably connected to the inner wall of the main valve body.

[0007] Furthermore, a secondary spring is sleeved on the surface of the secondary valve, and two ends of the secondary spring are respectively connected to the surface of the secondary valve and the inner wall of the secondary valve body.

[0008] Furthermore, the auxiliary valve includes a frame, an upper sealing gasket and a lower sealing gasket, and the upper sealing gasket and the lower sealing gasket are both connected to the frame. The upper sealing gasket is used to seal the connection between the frame and the auxiliary valve body after the frame moves upward, and the lower sealing gasket is used to seal the air hole after the frame is restored.

[0009] Furthermore, the electromagnetic assembly includes an electromagnet shell, a coil, a connector, a sleeve and an armature, the coil is arranged on the surface of the coil frame and installed inside the electromagnet shell; the connector is fixedly connected to the surface of the electromagnet shell, the armature is movably arranged inside the sleeve, the sleeve is installed inside the electromagnet shell, and the coil frame is sleeved on the surface of the sleeve; the auxiliary valve is connected to the armature.

[0010] Furthermore, the sleeve includes a stop iron, a magnetic isolation ring and an end head, the magnetic isolation ring is fixedly connected to the bottom of the stop iron, and the end head is fixedly connected to the bottom of the magnetic isolation ring; the armature is movably arranged inside the magnetic isolation ring.

[0011] Furthermore, a through hole is formed on the surface of the armature.

[0012] Furthermore, a second sealing gasket is fixedly connected to the upper surface of the auxiliary valve body, the surface of the second sealing gasket is movably connected to the bottom of the sleeve, and a third sealing gasket is fixedly connected to the lower surface of the auxiliary valve body, and the third sealing gasket is movably connected to the surface of the valve cover.

[0013] Furthermore, a fourth sealing gasket is fixedly connected to the valve cover at positions corresponding to the first air leakage hole and the second air leakage hole, and the fourth sealing gasket is movably connected to the surface of the main valve body.

[0014] Furthermore, a fifth sealing gasket is fixedly connected to the bottom of the valve cover, and a surface of the fifth sealing gasket is movably connected to a surface of the main valve body.

[0015] The present invention has the following beneficial effects:

[0016] (1) The large-caliber low-temperature exhaust solenoid valve has a gap between the main valve and the valve body to form an air supply channel. The main valve surface is hard chrome-plated, which reduces the friction, wear and jamming risk between the main valve and the valve body. The auxiliary valve and the armature adopt a split design to increase redundancy and avoid the impact of coaxial deviation caused by one-piece processing on assembly. The auxiliary valve is limited to a smaller movement stroke than the armature to limit the movement loss of the armature and improve the service life of the electromagnet.

[0017] (2) This large-diameter, low-temperature exhaust solenoid valve is a pilot-operated, internal exhaust solenoid valve. Compared with the combination of a pneumatic valve and a solenoid valve, its mass is greatly reduced. In addition, the pilot gas used in the pilot-operated, internal exhaust solenoid valve is the medium itself, and after the valve is closed, the pilot gas is directly discharged downstream of the valve rather than directly into the atmosphere, which, to a certain extent, plays a role in saving energy and protecting the environment. Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the large-diameter low-temperature exhaust solenoid valve of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the main valve body of the large-caliber low-temperature exhaust solenoid valve of the present invention.

[0020] Figure 3 This is the large-caliber low-temperature exhaust solenoid valve of the present invention Figure 2 A magnified view of the structure in the middle.

[0021] Figure 4 This is an enlarged view of the structure of the air hole of the large-diameter low-temperature exhaust solenoid valve of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the electromagnetic assembly of the large-diameter low-temperature exhaust solenoid valve of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the large-diameter low-temperature exhaust solenoid valve sleeve of the present invention.

[0024] Figure 7 This is a schematic diagram of the auxiliary valve structure of the large-caliber low-temperature exhaust solenoid valve of the present invention.

[0025] Figure 8 This is a schematic diagram of the main valve structure of the large-caliber low-temperature exhaust solenoid valve of the present invention.

[0026] In the figure, 1. main valve body; 2. valve cover; 3. main valve; 4. auxiliary valve body; 5. auxiliary valve; 501. skeleton; 502. upper sealing gasket; 503. lower sealing gasket; 6. outer sleeve nut; 7. air hole; 8. main spring; 9. first sealing gasket; 10. auxiliary spring; 11. electromagnet housing; 12. coil; 13. connector; 14. sleeve; 1401. stop iron; 1402. magnetic isolation ring; 1403. end; 15. armature; 16. through hole; 17. second sealing gasket; 18. third sealing gasket; 19. fourth sealing gasket; 20. fifth sealing gasket; 21. first air bleed hole; 22. second air bleed hole. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] See also Figures 1-8 The embodiment of the present invention provides a technical solution: a large-caliber low-temperature exhaust solenoid valve, comprising a main valve body 1 and a valve cover 2, the valve cover 2 being mounted on the top of the main valve body 1 by a bolt assembly, the main valve body 1 being provided with a main valve 3, and the top of the valve cover 2 being provided with an electromagnetic assembly; the top of the valve cover 2 being provided with an auxiliary valve body 4, the auxiliary valve body 4 being provided with an auxiliary valve 5, and the auxiliary valve body 4 being provided with an electromagnetic assembly through an outer sleeve nut 6; an air hole 7 being opened on the surface of the valve cover 2, the main valve body 1 being communicated with the auxiliary valve body 4 through the air hole 7, and the bottom of the auxiliary valve 5 being movably connected to the surface of the valve cover 2; a first air leakage hole 21 being provided inside the valve cover 2, a second air leakage hole 22 being provided inside the main valve body 1, and the first air leakage hole 21 being communicated with the second air leakage hole 22.

[0030] This solenoid valve is a pilot-operated internal exhaust solenoid valve. Compared with the combination of pneumatic valve and solenoid valve, its mass is greatly reduced. In addition, the pilot gas used in the pilot-operated internal exhaust solenoid valve is the medium itself, and after the valve is closed, the pilot gas is directly discharged downstream of the valve instead of directly into the atmosphere, which plays a role in saving energy and protecting the environment to a certain extent.

[0031] Specifically, when the valve is open, the auxiliary valve 5 forms a seal with the auxiliary valve body 4, and a gap remains between the armature 15 and the auxiliary valve seat, slowing heat transfer. The solenoid valve is secured to the valve cover 2 via the outer nut 6, and the valve cover 2 is connected to the main valve body 1 using a bolt assembly, forming a single unit.

[0032] Specifically, the surface of the main valve 3 is connected to the inner wall of the main valve body 1, and the inside of the main valve 3 is connected to the main spring 8. The end of the main spring 8 away from the main valve 3 is movably connected to the top of the inner wall of the main valve body 1; the bottom of the main valve 3 is fixedly connected to the first sealing gasket 9, and the surface of the first sealing gasket 9 is movably connected to the inner wall of the main valve body 1.

[0033] An auxiliary spring 10 is sleeved on the surface of the auxiliary valve 5 , and two ends of the auxiliary spring 10 are respectively connected to the surface of the auxiliary valve 5 and the inner wall of the auxiliary valve body 4 .

[0034] Specifically, the auxiliary valve 5 includes a skeleton 501, an upper sealing gasket 502 and a lower sealing gasket 503. The upper sealing gasket 502 and the lower sealing gasket 503 are both connected to the skeleton 501. The upper sealing gasket 502 is used to seal the connection between the skeleton 501 and the auxiliary valve body 4 after the skeleton 501 moves upward, and the lower sealing gasket 503 is used to seal the air hole 7 after the skeleton 501 is restored.

[0035] In this embodiment, the auxiliary valve 5 is composed of a frame 501, an upper sealing gasket 502 and a lower sealing gasket 503, wherein the upper sealing gasket 502 and the lower sealing gasket 503 are made of ultra-low temperature resistant plastic. Similarly, the surface of the auxiliary valve 5 is hard chrome-plated, which reduces the friction, wear and jamming risk between the auxiliary valve 5 and the auxiliary valve body 4.

[0036] Specifically, the electromagnetic assembly includes an electromagnetic housing 11, a coil 12, a connector 13, a sleeve 14, and an armature 15. The coil 12 is mounted on the surface of a coil bobbin and installed inside the electromagnetic housing 11. The connector 13 is fixedly connected to the surface of the electromagnetic housing 11, and the armature 15 is movably mounted inside the sleeve 14. The sleeve 14 is installed inside the electromagnetic housing 11, and the coil bobbin is sleeved on the surface of the sleeve 14. The auxiliary valve 5 is connected to the armature 15. In addition, because the coil bobbin is made of plastic with low thermal conductivity, the impact of low-temperature media on the coil 12 is also reduced, making this solenoid valve suitable for ultra-low temperature media.

[0037] The sleeve 14 includes a stop iron 1401 , a magnetic isolation ring 1402 and an end head 1403 . The magnetic isolation ring 1402 is fixedly connected to the bottom of the stop iron 1401 , and the end head 1403 is fixedly connected to the bottom of the magnetic isolation ring 1402 . The armature 15 is movably arranged inside the magnetic isolation ring 1402 .

[0038] The auxiliary valve 5 and armature 15 are designed as separate components, rather than the more common integrated design. This reduces weight while increasing redundancy and preventing assembly problems caused by coaxial deviations in integrated manufacturing. The auxiliary valve body 4 limits the position of the auxiliary valve 5, which in turn limits the travel of the armature 15. This prevents the armature 15 from colliding with the stop 1401 during movement, thereby extending the life of the electromagnet.

[0039] In this embodiment, when the connector 13 is energized, the coil 12 is powered, generating a magnetic force. Under the action of this electromagnetic force, the armature 15 drives the auxiliary valve 5 toward the stopper 1401, thereby compressing the auxiliary spring 10. The movement of the auxiliary valve 5, and therefore the frame 501, drives the upper and lower sealing gaskets 502 and 503, causing the lower sealing gasket 503 to break contact with the valve seat, thereby opening the air hole 7 and the first air vent 21. The upper sealing gasket 502 then connects to the top of the inner wall of the auxiliary valve body 4, and the auxiliary valve 5 stops moving.

[0040] The first bleed hole 21 is connected to the second bleed hole 22. Due to the opening of the auxiliary valve, the medium in the upper chamber of the main valve flows through the first and second bleed holes 21, 22, respectively, to the valve outlet, causing the pressure in the upper chamber of the main valve to decrease. A gap exists between the main valve 3 and the main valve body 1, but this gap is smaller than that between the first and second bleed holes 21, 22. This results in a much lower air supply rate than the air release rate, causing the pressure in the upper chamber of the main valve 3 to decrease rapidly. The pressure in the lower chamber of the main valve 3 then increases above that in the upper chamber. This pressure differential eventually overcomes the force of the main spring 8, causing the main valve 3 to move upward and the valve to open.

[0041] The gap between the main valve 3 and the main valve body 1 forms an air supply channel, which reduces one seal and reduces the friction during the movement of the main valve 3, thereby reducing the main spring force. At the same time, the surface of the main valve is hard chrome-plated, reducing the friction, wear and jamming risk between the main valve 3 and the main valve body 1.

[0042] A through hole 16 is formed on the surface of the armature 15 for quickly releasing gas during the movement of the armature 15 , thereby reducing resistance during the movement of the armature 15 .

[0043] After the electromagnet is powered off, the electromagnetic field disappears, the electromagnetic force disappears, and the auxiliary valve 5 drives the armature 15 to move downward under the force of the auxiliary spring 10. The auxiliary valve 5 is sealed against the valve cover 2, and the air hole 7 is closed, causing the medium in the upper chamber of the main valve 3 to no longer flow out. Instead, air is only supplied through the air supply channel between the main valve 3 and the main valve body 1, causing the air pressure in the chamber above the main valve 3 to increase rapidly, and under the action of the main spring 8, the original pressure difference force is overcome, and the main valve 3 begins to move downward. As the air pressure in the chamber above the main valve 3 continues to increase, the main valve 3 continues to accelerate downward until the main valve 3 is sealed against the main valve body 1, and the air pressure in the chamber above the main valve 3 finally reaches the same level as the air pressure in the chamber below, and the valve closes.

[0044] The upper surface of the auxiliary valve body 4 is fixedly connected to a second sealing gasket 17, the surface of the second sealing gasket 17 is movably connected to the bottom of the sleeve 14, and the lower surface of the auxiliary valve body 4 is fixedly connected to a third sealing gasket 18, which is movably connected to the surface of the valve cover 2.

[0045] A fourth sealing gasket 19 is fixedly connected to the valve cover 2 at positions corresponding to the first air leakage hole 21 and the second air leakage hole 22 . The fourth sealing gasket 19 is movably connected to the surface of the main valve body 1 .

[0046] A fifth sealing gasket 20 is fixedly connected to the bottom of the valve cover 2 , and a surface of the fifth sealing gasket 20 is movably connected to the surface of the main valve body 1 .

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A large-caliber low-temperature exhaust solenoid valve, comprising a main valve body (1) and a valve cover (2), wherein the valve cover (2) is mounted on the top of the main valve body (1) by a bolt assembly, and is characterized in that: A main valve (3) is arranged inside the main valve body (1), and an electromagnetic component is installed on the top of the valve cover (2); The top of the valve cover (2) is provided with an auxiliary valve body (4), the interior of the auxiliary valve body (4) is provided with an auxiliary valve (5), and the auxiliary valve body (4) is provided with an electromagnetic component through a sleeve nut (6); The surface of the valve cover (2) is provided with an air hole (7), the main valve body (1) is connected with the auxiliary valve body (4) through the air hole (7), and the bottom of the auxiliary valve (5) is movably connected with the surface of the valve cover (2); A first air leakage hole (21) is arranged inside the valve cover (2), and a second air leakage hole (22) is arranged inside the main valve body (1), and the first air leakage hole (21) is communicated with the second air leakage hole (22).

2. A large-caliber low-temperature exhaust solenoid valve according to claim 1, characterized in that: The surface of the main valve (3) is connected to the inner wall of the main valve body (1), the interior of the main valve (3) is connected to a main spring (8), and one end of the main spring (8) away from the main valve (3) is movably connected to the top of the inner wall of the main valve body (1); A first sealing gasket (9) is fixedly connected to the bottom of the main valve (3), and a surface of the first sealing gasket (9) is movably connected to the inner wall of the main valve body (1).

3. A large-caliber low-temperature exhaust solenoid valve according to claim 2, characterized in that: The surface of the auxiliary valve (5) is sleeved with an auxiliary spring (10), and the two ends of the auxiliary spring (10) are respectively connected to the surface of the auxiliary valve (5) and the inner wall of the auxiliary valve body (4).

4. A large-caliber low-temperature exhaust solenoid valve according to claim 3, characterized in that: The auxiliary valve (5) comprises a frame (501), an upper sealing gasket (502) and a lower sealing gasket (503), wherein the upper sealing gasket (502) and the lower sealing gasket (503) are both connected to the frame (501), the upper sealing gasket (502) is used to seal the connection between the frame (501) and the auxiliary valve body (4) after the frame (501) moves upward, and the lower sealing gasket (503) is used to seal the air hole (7) after the frame (501) is restored.

5. A large-caliber low-temperature exhaust solenoid valve according to claim 3, characterized in that: The electromagnetic assembly comprises an electromagnetic iron shell (11), a coil (12), a connector (13), a sleeve (14) and an armature (15); the coil (12) is arranged on the surface of a coil frame and installed inside the electromagnetic iron shell (11); The connector (13) is fixedly connected to the surface of the electromagnet shell (11), the armature (15) is movably arranged inside the sleeve (14), the sleeve (14) is installed inside the electromagnet shell (11), and the coil skeleton is sleeved on the surface of the sleeve (14); The auxiliary valve (5) is connected to the armature (15).

6. A large-caliber low-temperature exhaust solenoid valve according to claim 5, characterized in that: The sleeve (14) comprises a stop iron (1401), a magnetic isolation ring (1402) and an end head (1403); the magnetic isolation ring (1402) is fixedly connected to the bottom of the stop iron (1401), and the end head (1403) is fixedly connected to the bottom of the magnetic isolation ring (1402); The armature (15) is movably arranged inside the magnetic isolation ring (1402).

7. A large-caliber low-temperature exhaust solenoid valve according to claim 6, characterized in that: A through hole (16) is provided on the surface of the armature (15).

8. The large-caliber low-temperature exhaust solenoid valve according to claim 5, characterized in that: The upper surface of the auxiliary valve body (4) is fixedly connected to a second sealing gasket (17), the surface of the second sealing gasket (17) is movably connected to the bottom of the sleeve (14), and the lower surface of the auxiliary valve body (4) is fixedly connected to a third sealing gasket (18), and the third sealing gasket (18) is movably connected to the surface of the valve cover (2).

9. The large-caliber low-temperature exhaust solenoid valve according to claim 1, characterized in that: A fourth sealing gasket (19) is fixedly connected to the valve cover (2) at positions corresponding to the first air leakage hole (21) and the second air leakage hole (22), and the fourth sealing gasket (19) is movably connected to the surface of the main valve body (1).

10. A large-caliber low-temperature exhaust solenoid valve according to claim 1, characterized in that: A fifth sealing gasket (20) is fixedly connected to the bottom of the valve cover (2), and a surface of the fifth sealing gasket (20) is movably connected to a surface of the main valve body (1).

Images