High temperature gas flow automatic regulating valve

Abstract

The application discloses a high-temperature gas flow automatic regulating valve and relates to the technical field of valves.The application solves the problems of slow response speed and poor sealing and heat insulation capacity in the prior art.The application comprises a valve body, a flow-limiting nozzle structure is arranged on the valve body, a chamber is arranged on the flow-limiting nozzle structure, flow channel openings I and II, which are in communication with the chamber, are arranged on the flow-limiting nozzle structure, an electromagnet is connected to the valve body, a movable end of the electromagnet is connected to one end of a yoke, the other end of the yoke extends into the chamber and is matched with the flow channel opening II, the movable end of the electromagnet can drive the yoke to control the opening and closing degree of the flow channel opening II, and a sealing and heat insulation structure for matching with the yoke is arranged on the chamber.The sealing and heat insulation structure is matched with the yoke directly, sealing and heat insulation are formed, and the use requirement of a high-temperature medium conveying scene is met.The end of the yoke is matched with the flow channel opening II directly to control the flow, the design of a valve core is cancelled, space occupation is saved, the structure is simplified, friction in the control process is reduced, the driving force requirement of an electromagnetic valve is reduced, the response time of control is improved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to an automatic regulating valve for high-temperature gas flow. Background Technology

[0002] In modern automatic or hydraulic control systems, control valves play a vital role. They determine the correct distribution and control of the flowing medium. Due to different application scenarios, control valves are subjected to more severe working conditions such as temperature, pressure, corrosion, and contamination than hydraulic system components. When controlling the flow of fluids, they must operate stably and reliably.

[0003] Chinese invention patent CN112555441A discloses a large-flow proportional throttle valve, including a connecting plate, a rotating electromagnet and a valve body, a valve core rotatably connected to the valve body, an upper lever connected to the output shaft of the rotating electromagnet, and a lower fork connected to the valve core and used to drive the valve core to rotate. The valve body has an oil inlet and an oil outlet. The valve core has symmetrically arranged spiral grooves on both sides. A mounting base is provided on the connecting plate, and a positioning rod is provided on the mounting base. The upper end of the upper lever is rotatably connected to the positioning rod, and a return spring is provided on the positioning rod to drive the upper lever to reset. An arc block is provided at the lower end of the upper lever, and a U-shaped fork head is provided at the upper end of the lower fork to cooperate with the arc block. This invention can achieve stable control of large flow rates and can achieve a certain level of control accuracy and repeatability.

[0004] This solution also uses an upper lever and a lower fork to move the valve core to achieve flow regulation, but it lacks a corresponding sealing and heat insulation structure. It can only meet the requirements of low temperature environments. In high temperature fluid transportation scenarios, it is easy to cause excessive heat transfer, resulting in electromagnetic failure due to poor sealing and heat insulation.

[0005] Chinese invention patent CN107906221A discloses a two-position three-way directional valve and a directional valve method for a low-flow liquid nitrogen cryogenic system. The directional valve is an electromagnet-driven single-electro-controlled lever bellows valve, including a valve body structure, a bellows sealing structure, a lever hinge force-increasing structure, and an electromagnet force-generating structure. The valve body structure includes a valve seat, a double-cone movable valve stem, an upper cone sealing seat, a lower cone sealing seat, and a movable valve core connecting rod. The bellows sealing structure includes a bellows and an elastic connector. The lever hinge force-increasing structure includes a first conducting piston, a force-increasing connecting rod, and a second conducting piston.

[0006] This invention utilizes the principle of a stop valve to achieve the reversal of cryogenic fluids by switching the upper and lower conical sealing seats to block and open the double-conical movable valve stem. However, its heat insulation capability is limited, making it only suitable for cryogenic environments, especially for low-flow-rate cryogenic environments. In addition, its integration is limited, resulting in a large space volume.

[0007] Therefore, it is evident that most of the valve bodies in the aforementioned existing technologies are designed for low-temperature transport environments and are unsuitable for transporting high-temperature fluid media, especially in pipelines transporting media at temperatures above 1000 degrees Celsius. In high-temperature operating environments, hard seals are generally used. Existing valve bodies utilize electromagnets to move the valve core for flow control. The valve core must overcome friction while maintaining a seal, resulting in high triggering force and slow response speed.

[0008] Secondly, in existing valve bodies, the relevant flow channel structure and nozzle structure are directly machined on the valve body. However, the flow channel structure is complex and requires high precision machining. When the valve body structure is large and is machined as a single piece, it is difficult to control the machining precision. Summary of the Invention

[0009] To address the shortcomings of the aforementioned background technology, this invention proposes an automatic high-temperature gas flow regulating valve, which solves the problems of slow response speed and poor sealing and heat insulation in the prior art.

[0010] The technical solution of the present invention is implemented as follows: a high-temperature gas flow automatic regulating valve includes a valve body, wherein the valve body is provided with a flow limiting nozzle structure, the flow limiting nozzle structure is provided with a chamber, and the flow limiting nozzle structure is provided with a flow channel port I and a flow channel port II, both of which are connected to the chamber. An electromagnet is connected to the valve body, the movable end of the electromagnet is connected to one end of a shift fork, and the other end of the shift fork extends into the chamber and its end cooperates with the flow channel port II. The movable end of the electromagnet can drive the shift fork to control the opening and closing degree of the flow channel port II. The chamber is provided with a sealing and heat insulation structure for cooperating with the shift fork.

[0011] Preferably, the flow restrictor structure includes an adjustment seat, a chamber is opened on the adjustment seat, a pair of conical structural holes symmetrically opened on the adjustment seat to communicate with the chamber, a flow restrictor is provided through each conical structural hole, and the flow restrictor is provided with a throttling hole for communicating with the chamber and the flow channel II, and a fork is provided between the two flow restrictors.

[0012] Preferably, the flow restrictor and the adjusting seat are welded together by vacuum electron beam welding. The chamber is equipped with a filter corresponding to flow channel I.

[0013] Preferably, the upper end of the shift fork is hinged to the movable end of the electromagnet, and the middle part of the shift fork is hinged to the adjusting seat or valve body; one end of the chamber is open, and the shift fork is inserted into the chamber from the opening.

[0014] Preferably, the sealing and heat insulation structure includes a limiting block and a sealing gasket that are fixedly disposed in sequence at the opening of the chamber. The inner rings of the limiting block and the sealing gasket are both engaged with the shift fork. The valve body is provided with a stop block that engages with the opening end of the chamber. An aerogel layer is provided between the stop block and the sealing gasket.

[0015] Preferably, the sealing gasket is a flexible graphite sealing gasket, the limiting block is provided with a slope for limiting the rotation angle of the shift fork, and the shift fork is provided with a protrusion that cooperates with the flexible graphite sealing gasket.

[0016] Preferably, the valve body includes an I-shaped support with a connecting seat on it. Both the connecting seat and the support are connected to the flow restrictor assembly structure. An outer sleeve covering the electromagnet is connected to the support. An air gap is left between the outer sleeve and the electromagnet. The support has an opening for accommodating the connection between the electromagnet and the shift fork. The air gap communicates with the opening.

[0017] Preferably, the electromagnet includes a coil connected to a support, a movable iron core slidably mounted on the coil, the movable iron core being connected to one end of a connecting rod, the middle of the connecting rod being hinged to the upper end of a shift fork, the other end of the connecting rod cooperating with a spring, the other end of the spring cooperating with a top block, the top block being slidably mounted on the support, and the support having a knob cooperating with the top block, the knob being used to push the top block to slide, thereby adjusting the initial position of the spring. The support has air holes.

[0018] The beneficial effects of this invention are: by setting a sealing and heat-insulating structure, and using the sealing and heat-insulating structure to directly cooperate with the shift fork, a seal and heat insulation are formed to meet the usage requirements of high-temperature medium transportation scenarios.

[0019] This regulating valve incorporates a flow-limiting nozzle structure on the valve body to carry the fluid. This flow-limiting nozzle structure is designed and assembled separately from the valve body's support base. This avoids the machining errors and reduced heat insulation that can easily occur with existing technologies that directly create the corresponding fluid-carrying structure on the valve body. As a result, the flow channels I and II and the chamber height are concentrated on the flow-limiting nozzle structure, and the machining accuracy can be improved by processing them separately. At the same time, the overall assembly space is reduced, meeting the requirements for lightweight design.

[0020] The opening and closing degree between flow channel ports II is directly controlled by the position of the shift fork, thereby controlling the flow path between flow channel port I and flow channel port II, and realizing the regulation and control of flow rate. By using the end of the shift fork to directly cooperate with flow channel port II for flow regulation, the valve core design is eliminated, which not only saves space and simplifies the structure, but also reduces the friction during the regulation process, reduces the driving force requirement of the solenoid valve, and improves the response time of regulation. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the regulating valve structure of the present invention;

[0023] Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0024] In the diagram: 1: Valve body, 2: Flow restrictor structure, 3: Chamber, 4: Flow channel port I, 5: Flow channel port II, 6: Electromagnet, 7: Shift fork, 8: Sealing and heat insulation structure, 9: Adjusting seat, 10: Flow restrictor, 11: Flow channel, 12: Filter, 13: Limiting block, 14: Sealing gasket, 15: Stop block, 16: Aerogel layer, 17: Slope, 18: Protrusion, 19: Support, 20: Connecting seat, 21: Outer jacket, 22: Coil, 23: Moving iron core, 24: Connecting rod, 25: Spring, 26: Top block, 27: Knob, 28: Air hole. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1 As shown in Embodiment 1, a high-temperature gas flow automatic regulating valve includes a valve body 1, a flow-limiting nozzle structure 2 on the valve body 1, a chamber 3 on the flow-limiting nozzle structure 2, and flow channels I4 and II5, both connected to the chamber 3, on the flow-limiting nozzle structure 2. To avoid the processing errors and reduced heat insulation caused by directly creating the corresponding fluid-carrying structure on the valve body in the prior art, in this embodiment, the chamber 3, flow channel I4, and flow channel II5 for carrying the fluid are created on the flow-limiting nozzle structure. The flow-limiting nozzle structure for carrying the fluid is designed and assembled separately from the valve body's own support foundation. This concentrates the flow channel I4 and flow channel II5 and the chamber height on the flow-limiting nozzle structure, improving processing accuracy through separate processing while reducing the overall assembly space and meeting lightweight requirements.

[0027] Additionally, an electromagnet 6 is connected to the valve body 1. The movable end of the electromagnet 6 is connected to one end of a fork 7, and the other end of the fork 7 extends into the chamber 2 and engages with the flow channel port II 5. The movable end of the electromagnet 6 can drive the fork 7 to control the opening and closing degree of the flow channel port II 5. By changing the position of the fork 7, the opening and closing degree of the flow channel port II 5 is directly controlled, thereby controlling the connectivity between the flow channel port I 4 and the flow channel port II 5, achieving flow regulation and control. Flow regulation using the direct engagement of the fork 7 with the flow channel port II 5 eliminates the need for a valve core, saving space, simplifying the structure, reducing driving friction during regulation, reducing the driving force requirement for the solenoid valve, and improving the response time of regulation.

[0028] In addition, a sealing and heat-insulating structure 8 is provided on the chamber 2 for cooperating with the shift fork 7. The sealing and heat-insulating structure directly cooperates with the shift fork to form a seal and heat insulation, which improves the heat insulation capacity and makes it suitable for high-temperature scenarios.

[0029] In Example 2, based on Example 1, the flow restrictor structure 2 includes an adjustment seat 9, a chamber 3 is opened on the adjustment seat 9, a pair of conical structural holes symmetrically opened on the adjustment seat 9 to communicate with the chamber 3, a flow restrictor 10 is passed through each conical structural hole, and the flow restrictor 10 is provided with a throttling orifice 11 for communicating with the chamber 3 and the flow channel opening II 5, and a fork 7 is located between the two flow restrictors 10, and the lower end of the fork is used to cooperate with the two throttling orifices.

[0030] In addition, the upper end of the shift fork 7 is hinged to the movable end of the electromagnet 6, and the middle part of the shift fork 7 is hinged to the adjusting seat 9 or the valve body 1. In this embodiment, the shift fork 7 is hinged to the adjusting seat 9. One end of the chamber 3 is open, and the shift fork 7 is inserted into the chamber 3 from the opening. The lower end of the shift fork 7 is located between the two flow restrictors 10, so that the middle part of the shift fork 7 only needs a small range of motion to meet the switching movement of the lower end of the shift fork 7 between the two flow restrictors 10, thereby realizing flow regulation.

[0031] As a further implementation, the flow restrictor 10 and the adjusting seat 9 are processed separately to achieve higher processing accuracy. After the burrs are removed, the flow restrictor 10 is welded to the end face using vacuum electron beam welding. In this embodiment, by processing the flow restrictor 10 separately, dimensional and geometric tolerances of 0.005 mm or higher can be achieved. Vacuum electron beam welding offers advantages such as low deformation and high precision, avoiding the problems of difficult burr removal, excess material buildup during later use, and errors caused by welding deformation that arise from traditional one-piece processing.

[0032] In addition, a filter 12 corresponding to the flow channel port I4 is provided in the chamber 3. In actual use, the throttling orifices on the two flow restrictors are connected to the two flow channels II5 respectively. Flow channel II5 serves as the liquid outlet, and flow channel I4 serves as the liquid inlet. The medium enters the chamber through flow channel I4. The filter 12 can filter the medium, and the flow rate of the medium entering the throttling orifice 11 of the flow restrictors on both sides can be adjusted by moving the lower end of the fork closer or further away from the two flow restrictors, so as to ultimately achieve the purpose of adjusting the flow rate of the medium flowing out through flow channel II5.

[0033] This valve enables the solenoid valve's movable end to drive a fork via a mechanical connection, achieving a two-position three-way function. The flow-limiting nozzle structure 2 highly concentrates the inlet flow channel I4, filter 12, flow-limiting nozzle 10, throttling orifice 11, and flow channel II5, reducing assembly space and product weight, thus meeting lightweight design requirements. The opening of the throttling orifice is controlled by the gap between the lower end of the fork and the flow-limiting nozzle 10, regulating the flow rate through the two flow channels II5. This ensures high reliability, and the individual processing and integration of each structural component results in higher precision.

[0034] The moving end of the electromagnet drives the fork to rotate while moving, which directly acts on the flow restrictor structure 2 to regulate the flow. The flow rate of the two outlets is regulated by controlling the opening of the throttling orifice by the size of the gap. It has high reliability and a short switching time between the two outlets, which can be completed within 3ms, thus solving the problem of long response time of traditional high temperature and high pressure valves.

[0035] Example 3, as Figure 2 As shown, based on Embodiment 2, the sealing and heat insulation structure 8 includes a limiting block 13 and a sealing gasket 14 sequentially fixed at the opening of the chamber 3. The inner rings of both the sealing gasket 14 and the limiting block 13 mate with the shift fork 7. A stop block 15 is provided on the valve body 1 to mate with the opening of the chamber. The stop block 15 is connected to the valve body by bolts. An aerogel layer 16 is provided between the stop block 15 and the sealing gasket 14. In this embodiment, the aerogel layer can be selected from conventional aerogel materials such as silica aerogel, zirconia aerogel, carbide aerogel, or composite aerogel.

[0036] In this embodiment, the sealing gasket 14 is a flexible graphite gasket, which can maintain a good seal under high-temperature conditions and has a self-lubricating effect. In use, the flexible graphite acts as a sealant and also provides some lubrication for the fork. Furthermore, the high-temperature insulation of the outer aerogel layer effectively seals and isolates heat, reducing heat transfer from the conveyed medium to the electromagnet through the cavity, ensuring the electromagnet can operate normally in high-temperature medium conveying scenarios. In actual use, this valve adopts a combined aerogel and graphite sealing physical isolation structure. This physical insulation technology isolates the electromagnetic coil from the medium, preventing the high-temperature medium from affecting the coil performance, and can be used in environments with media temperatures up to 1700℃.

[0037] Correspondingly, in this embodiment, the shift fork is made of a material with low thermal conductivity, such as ceramic material, to further reduce the heat transfer to the electromagnet through the shift fork.

[0038] As a further embodiment, the limiting block 13 is provided with a slope 17 for limiting the rotation angle of the shift fork 7. In this embodiment, the limiting block is a ring structure, and the inner ring surface of the ring structure limiting block is a slope 17. When the shift fork rotates around the hinge part with the adjusting seat 9, it stops when it is in contact with the slope. The rotation range of the shift fork is limited by the limiting block.

[0039] As a further embodiment, a limiting ring plate 30 is provided between the limiting block and the chamber. The limiting ring plate can support the limiting block from the inside and together with the external stop block 15, determine the position of the limiting block, the sealing gasket, and the aerogel layer.

[0040] As a further optional embodiment, the shift fork 7 is provided with a protrusion 18, which cooperates with the flexible graphite sealing gasket. The protrusion can better fit and contact the top of the flexible graphite sealing gasket, improving the sealing ability. The limiting ring plate can support the sealing gasket from the inside and abut against the protrusion, thus forming a better seal.

[0041] In Example 4, based on Example 3, the valve body 1 includes an I-shaped support 19, on which a connecting seat 20 is provided. Both the connecting seat 20 and the support 19 are connected to the adjusting seat 9 of the flow restrictor assembly structure 2. The I-shaped support provides a fixed foundation for the electromagnet at the top and provides installation space for the flow restrictor structure at the bottom. Furthermore, the narrowing in the middle section further reduces heat conduction from the flow restrictor structure to the electromagnet at the top via the support.

[0042] In this embodiment, the lower part of the I-shaped support 19 is provided with a groove, and the connecting seat 20 is located in the groove with a gap between it and the support 19. The connecting seat 20 and the support 19 are respectively provided with openings in the middle to meet the requirements of the adjusting seat 9. The adjusting seat 9 passes through the opening and is connected by threads. As a further optional embodiment, an inner groove 29 is provided in the area corresponding to the opening of the adjusting seat 9 and the support 19, thereby reducing the contact area between the adjusting seat 9 and the support 19 and reducing heat transfer.

[0043] As a further embodiment, an outer sleeve 21 is connected to the support 19 and covers the electromagnet 6. The outer sleeve serves as a protective cover, and an air gap 31 is left between the outer sleeve 21 and the electromagnet 6. The support 19 is provided with an opening to allow the electromagnet 6 to connect with the fork 7. The air gap is connected to the opening, thereby using the air gap to connect the space where the opening is located with the outside world, which is conducive to heat dissipation.

[0044] Additionally, the electromagnet 6 includes a coil 22 connected to the support 19, with a washer between the coil and the support. A movable iron core 23 is slidably mounted on the coil 22, and the movable iron core 23 is connected to one end of a connecting rod 24. The middle part of the connecting rod 24 is hinged to the upper end of a shift fork 7, allowing the connecting rod to drive the shift fork to move. The other end of the connecting rod 24 cooperates with a spring 25, and the other end of the spring 25 cooperates with a top block 26. The top block 26 is slidably mounted on the support 19, and the support 19 has a knob 27 that cooperates with the top block 26. The supports rotate in a rotating fit. The knob 27 is used to push the top block 26 to slide, thereby adjusting the initial position of the spring 25. In this embodiment, the inner ring of the knob 27 is threadedly engaged with the top block 26. The top block 26 is fixedly connected to one end of the spring 25, and the other end of the spring 25 is fixedly connected to the end of the connecting rod 24. When adjusting the initial position of the spring 25 in the state of de-energization of the adjustment coil, the knob is rotated. The threaded engagement of the left and right lower knobs drives the top block to move axially, thereby synchronously driving the spring, connecting rod, and moving iron core to the initial position on the support.

[0045] In this embodiment, when the coil 22 of the electromagnet 6 is de-energized, the moving iron core 23 is positioned on the right side under the force of the spring 25. At this time, the limiting block 13 keeps the fork 7 fixed at a certain angle. The gap between the fork 7 and the right throttling orifice 11 increases, while the gap with the left throttling orifice decreases, thus reducing the flow on the left and increasing the flow on the right. When the electromagnet is energized, the moving iron core 23 moves to the left under the electromagnetic force and drives the fork 7 to move via the connecting rod 24. At this time, the limiting block 13 keeps the fork 7 fixed at a certain angle. The gap between the lower end of the fork and the left throttling orifice 11 increases, while the gap with the right side decreases, thus reducing the flow on the right and increasing the flow on the left. Through these actions, the opening of the throttling orifice on the flow restrictor is automatically controlled, ultimately controlling the flow rate flowing out through the left and right throttling orifices to flow channel I4 and flow channel II5. This valve achieves rapid and long-life switching between one inlet and two outlets through the combination of the electromagnetic force generated by the energized coil and the spring force of the spring.

[0046] As a further optional implementation, an air hole 28 is provided on the support 19, which corresponds to the gap between the connecting seat 20 and the support 19. This allows gas to be blown in during actual use, carrying away the heat at the gap and reducing the heat transfer from the connecting seat 20 to the support 2, thereby further achieving a certain temperature isolation purpose.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-temperature gas flow automatic regulating valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a flow-limiting nozzle structure (2), which is provided with a chamber (3). The flow-limiting nozzle structure (2) is provided with a flow channel port I (4) and a flow channel port II (5) that are both connected to the chamber (3). An electromagnet (6) is connected to the valve body (1). The movable end of the electromagnet (6) is connected to one end of a shift fork (7). The other end of the shift fork (7) extends into the chamber (3) and its end is engaged with the flow channel port II (5). The movable end of the electromagnet (6) can drive the shift fork (7). The opening and closing degree of the flow channel II (5) is controlled; the chamber (3) is provided with a sealing and heat-insulating structure (8) for cooperating with the fork (7); the flow restrictor structure (2) includes an adjusting seat (9), and the chamber (3) is opened on the adjusting seat (9); the upper end of the fork (7) is hinged to the movable end of the electromagnet (6), and the middle part of the fork (7) is hinged to the adjusting seat (9) or the valve body (1); one end of the chamber (3) is open, and the fork (7) is inserted into the chamber (3) from the opening; the sealing and heat-insulating structure (8) is provided on the chamber (3 ... chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the adjusting seat (9); the chamber (3) is opened on the The thermal structure (8) includes a limiting block (13) and a sealing gasket (14) fixedly disposed in sequence at the opening of the chamber (3). The inner rings of the limiting block (13) and the sealing gasket (14) are both engaged with the shift fork (7). The valve body (1) is provided with a stop block (15) that engages with the opening end of the chamber (3). An aerogel layer (16) is provided between the stop block (15) and the sealing gasket (14). The sealing gasket (14) is a flexible graphite sealing gasket. The limiting block (13) is provided with a function to limit the shift fork. (7) The slope (17) of the rotation angle, the fork (7) is provided with a protrusion (18), the protrusion (18) cooperates with the flexible graphite sealing gasket; the valve body (1) includes a support (19) with an I-shaped design, a connecting seat (20) is provided on the support (19), the connecting seat (20) and the support (19) are both connected to the flow restrictor structure (2), the narrowing of the middle section of the I-shaped support (19) can further reduce the heat conduction of the flow restrictor structure to the electromagnet above the support.

2. The high-temperature gas flow automatic regulating valve according to claim 1, characterized in that: The adjusting seat (9) is symmetrically provided with a pair of conical structure holes that connect the chamber. Each conical structure hole is provided with a flow restrictor (10), and the flow restrictor (10) is provided with a throttling hole (11) for connecting the chamber (3) and the flow channel II (5). The fork (7) is located between the two flow restrictors (10).

3. The high-temperature gas flow automatic regulating valve according to claim 2, characterized in that: The flow restrictor (10) and the adjusting seat (9) are welded together by vacuum electron beam welding.

4. The high-temperature gas flow automatic regulating valve according to claim 3, characterized in that: The chamber (3) is equipped with a filter (12) corresponding to the flow channel I (4).

5. The high-temperature gas flow automatic regulating valve according to claim 4, characterized in that: The support (19) is connected to an outer sleeve (21) covering the electromagnet (6); there is an air gap between the outer sleeve (21) and the electromagnet (6), and the support (19) is provided with an opening to allow the electromagnet (6) and the fork (7) to connect and move, and the air gap is connected to the opening.

6. The high-temperature gas flow automatic regulating valve according to claim 5, characterized in that: The electromagnet (6) includes a coil (22) connected to a support (19), a movable iron core (23) slidably disposed on the coil (22), the movable iron core (23) being connected to one end of a connecting rod (24), the middle part of the connecting rod (24) being hinged to the upper end of a fork (7), the other end of the connecting rod (24) cooperating with a spring (25), the other end of the spring (25) cooperating with a top block (26), the top block (26) being slidably disposed on the support (19), and a knob (27) cooperating with the top block (26) being disposed on the support (19), the knob (27) being used to push the top block (26) to slide and thereby adjust the initial position of the spring (25).

7. The high-temperature gas flow automatic regulating valve according to claim 6, characterized in that: The support (19) is provided with air holes (28).

Images