Hydro metallurgical zero leakage combined sealing device and experimental test device

Abstract

The present application belongs to the field of metallurgical equipment manufacturing and gas sealing technology, and particularly relates to a hydrogen metallurgy zero-leakage combined sealing device and an experimental testing device. The hydrogen metallurgy zero-leakage combined sealing device comprises a static connecting part and a dynamic connecting part. The static connecting part comprises an inner sleeve and a heat dissipation ring. The heat dissipation ring is provided with an annular tooth and a high-pressure air inlet groove on one side. The outer part of the heat dissipation ring is provided with a static electrode shoe. A magnetic fluid groove is formed in the static electrode shoe, and a magnetic fluid is arranged in the magnetic fluid groove. The dynamic connecting part comprises a high-temperature sealing sleeve. The high-temperature sealing sleeve is provided with a sealing tooth on one side. The sealing tooth and the annular tooth are arranged in a staggered manner to form a labyrinth seal. A high-pressure air inlet groove is formed in one side of the high-temperature sealing sleeve. High-pressure gas enters the high-pressure air inlet groove to form an air curtain for air curtain sealing. A dynamic electrode shoe is connected to the outer diameter of one side of the high-temperature sealing sleeve. The end of the dynamic electrode shoe extends into the magnetic fluid to form a magnetic fluid seal. The present application can significantly reduce the probability of hydrogen leakage.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical equipment manufacturing and gas sealing, and particularly relates to a hydrogen metallurgical zero-leakage combined sealing device and an experimental testing device. Background Art

[0002] With the deepening implementation of the "30×60 Dual Carbon" strategic goals, the metallurgical industry, a key sector with high energy consumption and carbon emissions, faces unprecedented pressure and challenges in its green transformation. Hydrogen metallurgy technology, which replaces traditional carbon-based reducing agents with hydrogen, can significantly reduce CO2 emissions. It is one of the key pathways for the metallurgical industry to achieve low-carbon or even zero-carbon development, providing new productivity for building a clean, efficient, and sustainable steel production system. The reliable sealing between the cylinder, kiln head, and kiln tail of a hydrogen metallurgical rotary kiln is a key guarantee for the safe and stable operation of the hydrogen metallurgical process.

[0003] Traditional rotary kilns typically utilize sealing structures using flake seals, graphite block seals, and rubber-plastic seals. However, flake seals rely on precise fit and are susceptible to leakage due to thermal deformation or wear. Graphite in graphite block seals is susceptible to wear and brittle cracking, requiring regular replacement. Rubber-plastic seals age rapidly at high temperatures, leading to a rapid decline in sealing performance. In particular, small molecules such as hydrogen easily leak through the surface roughness of flake and graphite block seals, creating micro-leakage channels. Due to the high surface roughness of flake and graphite block seals, hydrogen molecules easily leak through gaps formed between the flake and graphite seals, creating micro-leakage channels. Once hydrogen leaks, it not only pollutes the environment and reduces reduction efficiency, but also potentially forms an explosive mixture when hydrogen is transported through air, posing a significant safety risk. Therefore, ensuring reliable sealing in hydrogen metallurgical rotary kilns has become a critical issue that needs to be addressed. Summary of the Invention

[0004] The purpose of the present invention is to provide a hydrogen metallurgical zero-leakage combined sealing device and experimental testing system, which combines labyrinth seal decompression and cooling, air curtain seal of high-pressure and high-speed gas and magnetic fluid seal to achieve the "zero leakage" goal of hydrogen in the hydrogen metallurgical rotary kiln process.

[0005] The technical solution of the present invention is: a hydrogen metallurgical zero-leakage combined sealing device is arranged between the kiln body and the kiln head and between the kiln body and the kiln tail of a rotary kiln, and the combined sealing device includes:

[0006] The static connection part is installed on the kiln head or kiln tail of the rotary kiln, and the static connection part includes an inner sleeve, one end of the inner sleeve is installed on the kiln head or kiln tail, and one end face of the inner sleeve is supported by a heat dissipation ring, one end of the heat dissipation ring is connected to the end of the inner sleeve, and the other end of the heat dissipation ring is installed on the kiln head or kiln tail, and a plurality of annular teeth are evenly arranged on the outer wall of one side of the heat dissipation ring; a high-pressure air inlet groove is provided on one side of the high-pressure air inlet groove, and a high-pressure air nozzle is provided on one side of the high-pressure air inlet groove, which is connected to the high-pressure air nozzle, and one side of the high-pressure air nozzle is connected to the end face of one side of the heat dissipation ring, and the high-pressure air nozzle is arranged on the outside of the annular teeth, and a plurality of high-pressure vents are evenly provided on the heat dissipation ring, and the plurality of high-pressure vents are connected to the high-pressure air inlet groove and the high-pressure gas source; a high-temperature side wiring channel and a low-temperature side wiring channel are provided on the heat dissipation ring. The heat dissipation ring is provided with a static pole shoe on the outside, a magnetic fluid groove is provided on the static pole shoe, and magnetic fluid is provided in the magnetic fluid groove. A high-temperature side placement groove and a low-temperature side placement groove are respectively provided at both ends of the static pole shoe. An iron core ring and a coil are provided in the high-temperature side placement groove and the low-temperature side placement groove. The openings of the high-temperature side placement groove and the low-temperature side placement groove are respectively connected to the high-temperature side cover plate and the low-temperature side cover plate. A high-temperature side wiring port and a low-temperature side wiring port are respectively provided on the high-temperature side cover plate and the low-temperature side cover plate. The coil in the high-temperature side placement groove is connected to the external power supply through the high-temperature side wiring port and the high-temperature side wiring channel. The coil in the low-temperature side placement groove is connected to the external power supply through the low-temperature side wiring port and the low-temperature side wiring channel. Each coil connected to the power supply forms an electromagnet together with its corresponding iron core ring;

[0007] The dynamic connection part is arranged on one side of the static connection part, and the dynamic connection part includes a high-temperature sealing sleeve, which is arranged on the cylinder of the rotary kiln. A plurality of dynamic sealing teeth are evenly arranged on one side of the high-temperature sealing sleeve, and a plurality of the dynamic sealing teeth correspond to the annular teeth, and a plurality of dynamic sealing teeth and a plurality of annular teeth are staggered to form a labyrinth seal; a high-pressure ventilation groove is provided on one side of the high-temperature sealing sleeve, and the position of the high-pressure ventilation groove corresponds to the position of the high-pressure air inlet groove. The air curtain formed by the high-pressure air jet nozzle and the high-pressure ventilation groove and the radially outermost outlet of the labyrinth seal jointly form an air curtain sealing cavity; a high-pressure return air ring is provided at the inner diameter of the high-temperature sealing sleeve, and a plurality of air hole channels are evenly provided on the high-pressure return air ring, and the air hole channels are One end of the channel is connected to the high-pressure ventilation groove, and the high-pressure gas at the high-pressure gas source enters the high-pressure ventilation groove through the high-pressure vent hole and the high-pressure air inlet groove, and forms an air curtain between the high-pressure air inlet groove and the high-pressure ventilation groove. The gas inside the inner sleeve is sealed by the air curtain, and the high-pressure gas in the high-pressure ventilation groove enters the interior of the high-temperature sealing sleeve and the inner sleeve through the air hole channel; a moving pole shoe is connected to the outer diameter of one side of the high-temperature sealing sleeve, and the moving pole shoe is sleeved on the outside of the static pole shoe. One end of the moving pole shoe extends to the interior of the magnetic fluid groove, and the end of the moving pole shoe extends below the liquid surface of the magnetic fluid to form a magnetic fluid seal. In addition, the side wall of the moving pole shoe, the side wall of the static pole shoe and the side wall of the high-temperature sealing sleeve together constitute a magnetic fluid sealing chamber.

[0008] Preferably, the high-pressure gas generated by the high-pressure gas source is an inert gas.

[0009] Furthermore, the end face of the heat dissipation ring is fixed to the kiln head or the kiln tail and is connected to the inner sleeve through a cooling cover plate, and a cooling liquid is provided in the cooling cavity formed by the heat dissipation ring, the inner sleeve and the cooling cover plate; a plurality of cooling grooves are evenly provided on the inner wall of the heat dissipation ring, and the cooling grooves and the annular teeth are located on the same side wall of the heat dissipation ring, and a plurality of the cooling grooves and a plurality of the annular teeth are staggered, and a plurality of the cooling grooves are connected to the cooling cavity.

[0010] Furthermore, the outer sleeve of the static pole shoe and the movable pole shoe is provided with an outer sleeve, one end of the outer sleeve is connected to the kiln head or kiln tail of the rotary kiln, and the other end of the outer sleeve is provided with an air jet ring, which is used to prevent external dust and air from entering the interior of the magnetic fluid tank through the gap between the outer sleeve and the movable pole shoe.

[0011] Furthermore, the high-temperature side placement groove and the annular tooth are located on the same side, and the high-temperature side placement groove and the low-temperature side placement groove are symmetrically arranged on both sides of the magnetic fluid groove.

[0012] Preferably, pole teeth are provided at both radial and axial positions of the end of the moving pole shoe.

[0013] An experimental test device for a hydrogen metallurgical zero-leakage combined sealing device is used to monitor the above-mentioned combined sealing device, including a mounting base, a sealing base provided on one side of the upper surface of the mounting base, and the sealing base is used to mount the combined sealing device, that is, the inner sleeve, the heat dissipation ring, and one end of the outer sleeve in the combined sealing device are all mounted on one side of the sealing base, and a mounting opening is opened in the middle of the sealing base, and a closing cover is provided at the mounting opening, and the closing cover corresponds to the position of the inner sleeve; the experimental test device also includes:

[0014] A transmission assembly includes a motor and a bearing seat. The motor and the bearing seat are both arranged on a mounting base. The output end of the motor is connected to a torque sensor via a coupling. One end of the torque sensor is connected to a coupling heat-insulating hub via a roller coupling adapter. The outer sleeve of the coupling heat-insulating hub is provided with a motor heat-insulating flange. One end of the motor heat-insulating flange is connected to a high-temperature sealing sleeve in a combined sealing device. A sealing sleeve heat-insulating layer is provided between the motor heat-insulating flange and the high-temperature sealing sleeve. The outer sleeve of the motor heat-insulating flange is provided with a bearing heat-insulating hub. The bearing heat-insulating hub is provided in the bearing seat via a bearing.

[0015] The channel assembly includes a filling hole and a return hole arranged on the closing cover, a process simulation sealing cavity temperature monitoring port and a process simulation sealing cavity pressure monitoring port, a magnetic fluid injection port and a magnetic fluid discharge port, a magnetic fluid temperature monitoring port and a magnetic fluid pressure monitoring port arranged on the sealing base, a magnetic fluid injection channel and a magnetic fluid discharge channel arranged on the heat dissipation ring, a magnetic fluid temperature monitoring inlet and a magnetic fluid pressure monitoring inlet, a magnetic fluid temperature monitoring through hole and a magnetic fluid pressure monitoring through hole arranged on the low-temperature side cover, and a magnetic fluid temperature monitoring channel and a magnetic fluid pressure monitoring channel arranged on the static pole shoe; wherein, high-temperature and high-pressure gas is injected into the interior of the inner sleeve through the filling hole, and the high-temperature and high-pressure gas enters the external high-temperature and high-pressure gas generating device through the return hole to form circulating gas, so that the installation port, the closing The temperature and pressure of the process simulation sealing chamber formed by the cover, the static connection part and the dynamic connection part always maintain the set pressure and temperature; one end of the magnetic fluid injection channel and the magnetic fluid discharge channel are connected to the magnetic fluid injection port and the magnetic fluid discharge port respectively, and the other ends of the magnetic fluid injection channel and the magnetic fluid discharge channel are connected to the magnetic fluid tank through the magnetic fluid through-hole opened on the static pole shoe, and the magnetic fluid injection device injects magnetic fluid into the interior of the magnetic fluid tank through the magnetic fluid injection port, the magnetic fluid injection channel and the magnetic fluid through-hole; the magnetic fluid temperature monitoring port is connected to the magnetic fluid tank through the magnetic fluid temperature monitoring inlet, the magnetic fluid temperature monitoring through-hole and the magnetic fluid temperature monitoring channel, and the magnetic fluid pressure monitoring port is connected to the magnetic fluid tank through the magnetic fluid pressure monitoring inlet, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel;

[0016] The monitoring and control component includes a power supply, a high-temperature gas source, a motor controller, a process simulation sealing chamber temperature sensor and a process simulation sealing chamber pressure sensor, a magnetic fluid temperature sensor and a magnetic fluid pressure sensor; wherein the power supply is connected to the two coils in the combined sealing device, the high-temperature gas source is arranged at the filling hole, and the motor controller controls the start and stop and speed of the motor; the process simulation sealing chamber temperature sensor and the process simulation sealing chamber pressure sensor respectively monitor the temperature and pressure of the gas inside the inner sleeve through the process simulation sealing chamber temperature monitoring port and the process simulation sealing chamber pressure monitoring port; the magnetic fluid temperature sensor and the magnetic fluid pressure sensor are respectively arranged at the magnetic fluid temperature monitoring port and the magnetic fluid pressure monitoring port, the magnetic fluid temperature sensor monitors the temperature of the magnetic fluid inside the magnetic fluid tank through the magnetic fluid temperature monitoring port, the magnetic fluid temperature monitoring inlet, the magnetic fluid temperature monitoring through-hole and the magnetic fluid temperature monitoring channel, and the magnetic fluid pressure sensor monitors the pressure of the magnetic fluid inside the magnetic fluid tank through the magnetic fluid pressure monitoring port, the magnetic fluid pressure monitoring inlet, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel.

[0017] Furthermore, the channel assembly also includes a first gas temperature monitoring port, a first gas pressure monitoring port, a second gas temperature monitoring port, and a second gas pressure monitoring port arranged on the sealing base, a first gas temperature monitoring channel, a first gas pressure monitoring channel, a second gas temperature monitoring channel, and a second gas pressure monitoring channel arranged on the heat dissipation ring, a gas temperature monitoring inlet and a gas pressure monitoring inlet arranged on the low-temperature side cover plate, a gas temperature monitoring outlet and a gas pressure monitoring outlet arranged on the high-temperature side cover plate, and a gas temperature monitoring through-hole and a gas pressure monitoring through-hole arranged on the static pole shoe; wherein, one end of the first gas temperature monitoring channel is connected to the first gas temperature monitoring port, one end of the first gas pressure monitoring channel is connected to the first gas pressure monitoring port, and the other ends of the first gas pressure monitoring channel and the first gas temperature monitoring channel are both arranged between the annular tooth and the high-pressure air inlet groove; the second gas temperature monitoring port is connected to the gas temperature monitoring outlet through the second gas temperature monitoring channel, the gas temperature monitoring inlet and the gas temperature monitoring through-hole, and the second gas pressure monitoring port is connected to the gas pressure monitoring outlet through the second gas pressure monitoring channel, the gas pressure monitoring inlet and the gas pressure monitoring through-hole.

[0018] Furthermore, the monitoring and control component also includes a first gas temperature sensor, a first gas pressure sensor, a second gas temperature sensor, and a second gas pressure sensor, wherein the first gas temperature sensor is arranged at the first gas temperature monitoring port, and the gas temperature before entering the air curtain seal is monitored through the first gas temperature sensor, the first gas temperature monitoring port, and the first gas temperature monitoring channel; the first gas pressure is arranged at the first gas pressure monitoring port, and the gas pressure before entering the air curtain seal is monitored through the first gas pressure sensor, the first gas pressure monitoring port, and the first gas pressure monitoring channel; the second gas temperature sensor is arranged at the second gas temperature monitoring port, and the gas temperature entering the magnetic fluid sealing cavity is monitored through the second gas temperature sensor, the second gas temperature monitoring port, the second gas temperature monitoring channel, the gas temperature monitoring inlet, the gas temperature monitoring through-hole, and the gas temperature monitoring outlet; the second gas pressure sensor is arranged at the second gas pressure monitoring port, and the gas pressure entering the magnetic fluid sealing cavity is monitored through the second gas pressure sensor, the second gas pressure monitoring port, the second gas pressure monitoring channel, the gas pressure monitoring inlet, the gas pressure monitoring through-hole, and the gas pressure monitoring outlet.

[0019] Preferably, the channel assembly also includes a coolant inlet and a coolant outlet arranged on the sealing base, and a coolant injection channel and a coolant outlet channel arranged on the heat dissipation ring; wherein the coolant inlet and the coolant outlet are respectively connected to the cooling cavity through the coolant injection channel and the coolant outlet channel, and the coolant injection device injects coolant into the interior of the cooling cavity through the coolant inlet and the coolant injection channel.

[0020] The beneficial effects of the present invention are:

[0021] The present invention adopts a multi-stage collaborative sealing method of labyrinth seal, air curtain seal and magnetic fluid seal, and realizes zero leakage sealing of high-temperature and high-pressure hydrogen metallurgical rotary kiln gas through step-by-step pressure drop of gas and barrier mechanism, thereby improving the safe and stable operation of the hydrogen metallurgical sealing system; after the high-temperature and high-pressure gas passes through the labyrinth seal and cooling system radially from the inside to the outside, the pressure and temperature of the gas are greatly reduced, and the high-temperature sealing gas is further converted into low-temperature sealing gas through the normal-temperature high-speed air curtain, and finally the small amount of normal-temperature gas leaked after the air curtain sealing is sealed by the magnetic fluid seal, until the internal pressure of the sealing chamber before and after the air curtain sealing is basically the same and the gas no longer leaks through the air curtain, so that there is basically no pressure difference on both sides of the air curtain seal to maintain the stable sealing of the air curtain, thereby realizing zero leakage and long-life sealing of hydrogen.

[0022] The experimental test device is used to monitor the sealing status of the combined sealing device and to monitor the operating status of the combined sealing device in a high-temperature, high-pressure hydrogen environment in real time, thereby further ensuring the safety and maintainability of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 Rotary kiln for hydrogen metallurgy process;

[0025] Figure 2 This is a schematic diagram of the overall structure of the experimental test system of the hydrogen metallurgy zero-leakage combined sealing device;

[0026] Figure 3 is a cross-sectional schematic diagram of the static connection part;

[0027] Figure 4 It is a cross-sectional schematic diagram of the static pole shoe;

[0028] Figure 5 is a cross-sectional schematic diagram of the dynamic connection part;

[0029] Figure 6 This is a cross-sectional schematic diagram of an experimental test system for a hydrogen metallurgical zero-leakage combined sealing device;

[0030] Figure 7 for Figure 6 A partial enlarged view of point G in the middle;

[0031] Figure 8 It is a side view of the heat dissipation ring;

[0032] Figure 9 It is a cross-sectional schematic diagram of a high-temperature sealing sleeve;

[0033] Figure 10 Schematic diagram of the structure of the moving pole shoe;

[0034] Figure 11 Side view of the sealed base Figure 1 Species marked diagram;

[0035] Figure 12 is another labeled representation of a side view of the sealing base;

[0036] Figure 13 for Figure 11 Cross-section of the middle AA;

[0037] Figure 14 for Figure 11 Cross-section of the middle BB;

[0038] Figure 15 for Figure 11 Cross-section of the middle CC;

[0039] Figure 16 for Figure 11 Cross-section of the middle DD;

[0040] Figure 17 for Figure 11 Cross-section of EE;

[0041] Figure 18 for Figure 11 Cross-section of the FF.

[0042] In the figure: static connection part 1, inner sleeve 101, heat dissipation ring 102, high temperature side wiring channel 102-1, low temperature side wiring channel 102-2, cooling cavity 103, annular gear 104, cooling groove 105, high pressure air inlet groove 106, high pressure vent hole 106-1, cooling cover plate 107, static pole shoe 108, magnetic fluid groove 109, magnetic fluid through hole 109-1, high temperature side cover plate 110, high temperature side wiring port 110-1, low temperature side cover plate 111, low temperature side wiring port 111-1, electromagnet 112, core ring 112-1, coil 112-2, magnetic fluid sealing cavity 113, outer sleeve 114, high pressure air nozzle 1 15, jet ring 116; dynamic connection part 2, high-temperature sealing sleeve 201, sealing tooth 202, high-pressure ventilation groove 203, air hole channel 203-1, dynamic pole shoe 204, pole tooth 205, high-pressure return air ring 206, air curtain sealing chamber 207; mounting base 3; sealing base 4, mounting port 401, closing cover 402, process simulation sealing chamber 403; transmission assembly 5, motor 501, coupling 502, torque sensor 503, roller coupling adapter 504, coupling insulation hub 505, motor insulation flange 506, sealing sleeve insulation layer 507, bearing seat 508, bearing insulation hub 509; channel assembly 6, Filling hole 601, process simulation sealed cavity temperature monitoring port 602, process simulation sealed cavity pressure monitoring port 603, coolant injection port 604, coolant injection channel 604-1, coolant discharge port 605, coolant discharge channel 605-1, magnetic fluid injection port 606, magnetic fluid injection channel 606-1, magnetic fluid discharge port 607, magnetic fluid discharge channel 607-1, magnetic fluid temperature monitoring port 608, magnetic fluid temperature monitoring inlet 608-1, magnetic fluid temperature monitoring through hole 608-2, magnetic fluid temperature monitoring channel 608-3, magnetic fluid pressure monitoring port 609, magnetic fluid pressure monitoring inlet 609 -1, first gas temperature monitoring port 610, first gas temperature monitoring channel 610-1, second gas temperature monitoring port 611, second gas temperature monitoring channel 611-1, gas temperature monitoring inlet 611-2, gas temperature monitoring through hole 611-3, gas temperature monitoring outlet 611-4, first gas pressure monitoring port 612, first gas pressure monitoring channel 612-1, second gas pressure monitoring port 613, second gas pressure monitoring channel 613-1, return air hole 614; rotary kiln 7, kiln head 701, kiln tail 702, cylinder 703; gas sealing ring 8; coolant sealing ring 9; magnetic fluid sealing ring 10. DETAILED DESCRIPTION

[0043] 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.

[0044] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "one side", "one end", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention; the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "set", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The sealing structure of a traditional rotary kiln usually adopts flake seals, graphite block seals and rubber-plastic seals. Flake seals rely on the accuracy of flake fit and are prone to leakage after thermal deformation or wear. The graphite in graphite block seals is prone to wear and brittle cracking and needs to be replaced regularly. Rubber-plastic seals age quickly at high temperatures, resulting in a rapid decrease in sealing performance. In particular, small molecules such as hydrogen can easily pass through the surface roughness of flake seals and graphite block seals to create micro-leakage channels, causing hydrogen leakage. That is, due to the large surface roughness of flake seals and graphite block seals, hydrogen molecules can easily leak from the gaps formed by the roughness of the flake seals and graphite seals. These gaps are micro-leakage channels. Once hydrogen leaks, it not only causes environmental pollution and reduces reduction efficiency, but also hydrogen flowing in the air may form an explosive mixed gas, posing an extremely high safety risk. Therefore, the inventors of this application provide a hydrogen metallurgical zero-leakage combined sealing device and an experimental testing device that can achieve zero-leakage sealing for high-temperature and high-pressure hydrogen and improve the stability and safety of the system seal.

[0046] like Figure 1 、 Figure 3-10 and Figure 13-18As shown, the hydrogen metallurgical zero-leakage combined sealing device is arranged between the cylinder 703 and the kiln head 701 and the kiln tail 702 of the rotary kiln 7, that is, a combined sealing device is provided between the cylinder 703 and the kiln head 701 and between the cylinder 703 and the kiln tail 702. The combined sealing device includes: a static connection part 1 and a dynamic connection part 2, wherein the static connection part 1 and the dynamic connection part 2 jointly form a labyrinth sealing gap, an air curtain sealing cavity 207 and a magnetic fluid sealing cavity 113.

[0047] Among them, Figure 1-8 as well as Figure 13-18 As shown, the static connection part 1 is installed on the kiln head 701 or the kiln tail 702 of the rotary kiln 7, and the static connection part 1 includes an inner sleeve 101, which is installed on the kiln head 701 or the kiln tail 702. One end face of the inner sleeve 101 is connected to a heat dissipation ring 102, which is installed on the kiln head 701 or the kiln tail 702, and the heat dissipation ring 102 is fixed to the end face of the kiln head 701 or the kiln tail 702 and connected to the inner sleeve 1 through a cooling cover plate 107. 01, a cooling liquid is provided in a cooling cavity 103 formed by the heat dissipation ring 102, the inner sleeve 101 and the cooling cover plate 107, a plurality of annular teeth 104 are evenly provided on the outer wall of one side of the heat dissipation ring 102, and a plurality of cooling grooves 105 are evenly opened on the inner wall of the heat dissipation ring 102. The plurality of cooling grooves 105 and the plurality of annular teeth 104 are staggered, and the plurality of cooling grooves 105 are all connected to the cooling cavity 103; Figure 3 、 Figure 6 、 Figure 7 and Figure 15 As shown, a high-pressure air inlet groove 106 is provided on one side of the heat dissipation ring 102, and a high-pressure air nozzle 115 is provided on one side of the high-pressure air inlet groove 106 in communication therewith. One side of the high-pressure air nozzle 115 is in communication with the end face of the heat dissipation ring 102. The high-pressure air inlet groove 106 is provided on the outer side of the annular gear 104. A plurality of high-pressure air vents 106-1 are evenly provided on the heat dissipation ring 102, and the plurality of high-pressure air vents 106-1 are in communication with the high-pressure air inlet groove 106 and the high-pressure air source; Figure 3-4 、 Figure 6 、 Figure 13-14As shown, a high-temperature side wiring channel 102-1 and a low-temperature side wiring channel 102-2 are provided on the heat dissipation ring 102, and a static pole shoe 108 is provided on the outer sleeve of the heat dissipation ring 102. A magnetic fluid groove 109 is provided on the static pole shoe 108, and magnetic fluid is provided in the magnetic fluid groove 109. A high-temperature side placement groove and a low-temperature side placement groove are respectively provided at both ends of the static pole shoe 108. The high-temperature side placement groove and the annular tooth 104 are located on the same side, and the high-temperature side placement groove and the low-temperature side placement groove are symmetrically arranged on both sides of the magnetic fluid groove 109; an iron core ring 112-1 and a coil 112-2 are provided in the high-temperature side placement groove and the low-temperature side placement groove, and the openings of the high-temperature side placement groove and the low-temperature side placement groove are respectively connected to a high-temperature side cover plate 110 and a low-temperature side cover plate 111, and a high-temperature side wiring port 110-1 and a low-temperature side wiring port 111-1 are respectively provided on the high-temperature side cover plate 110 and the low-temperature side cover plate 111, as shown Figure 13 and Figure 14 As shown, the coil 112-2 in the high-temperature side slot is connected to the external power supply through the high-temperature side cable outlet 110-1 and the high-temperature side cable channel 102-1, and the coil 112-2 in the low-temperature side slot is connected to the external power supply through the low-temperature side cable outlet 111-1 and the low-temperature side cable channel 102-2; Figure 4 As shown, each coil 112-2 connected to the power supply and its corresponding iron core ring 112-1 together form an electromagnet 112, that is, an electromagnet 112 is provided in the high-temperature side placement groove and the low-temperature side placement groove on both sides of the magnetic fluid groove 109. The electromagnet 112 adsorbs the magnetic fluid in the magnetic fluid groove 109 to play a sealing role. The electromagnet 112 avoids the expensive cost of processing and manufacturing large-diameter permanent magnets required for large-diameter rotary kilns, and at the same time avoids the demagnetization of permanent magnets over a long period of time, thereby ensuring the long-life and reliable operation of the rotary kiln 7 seal.

[0048] Based on the above embodiment, the cylinder 703 of the rotary kiln 7 is also called the kiln body. In order to reduce the explosion risk of the hydrogen metallurgical process and improve the controllability of the metallurgical reduction process, a mixed reducing gas of hydrogen and nitrogen in a certain proportion is usually continuously filled into the kiln tail 702 of the rotary kiln 7, and the hydrogen therein is used as a reducing agent to carry out the reduction reaction. The hydrogen in the kiln body flows from the kiln tail 702 to the kiln head 701 along the rotating cylinder 703, and the reducing gas is prevented from leaking to the outside of the kiln body through the sealing device. In this embodiment, the preheated high-pressure hydrogen and iron ore waiting for the reduced minerals enter the interior of the insulated inner sleeve 101 from the inlet of the kiln tail 702, and are discharged along the insulated inner sleeve 101 to the rotating cylinder 703. 03 flows, and metallurgical reduction is carried out on iron ore, copper ore, etc. The rotating cylinder uses electromagnetic heating to further heat the internal temperature of the cylinder 703 so that the hydrogen reaches the set temperature of the metallurgical process. When the metal minerals rotate with the cylinder 703 and reach the kiln head 701, they are reduced to pure iron and other metal minerals and enter the subsequent processes such as cooling and transportation. In this process, the combined sealing device seals the reaction between the rotating cylinder 703 and the fixed kiln head 701 and the fixed kiln tail 702. The rotating cylinder 703 is the cylinder 703 in a working state of continuous rotation, and the fixed kiln head 701 and the fixed kiln tail 702 are the kiln head 701 and the kiln tail 702 in a working state of fixed motion.

[0049] In this embodiment, if Figure 2-10 as well as Figure 13-18 As shown, the dynamic connection part 2 is provided on one side of the static connection part 1, and the dynamic connection part 2 includes a high-temperature sealing sleeve 201. The high-temperature sealing sleeve 201 is provided on the rotating cylinder 703 of the rotary kiln. A plurality of dynamic sealing teeth 202 are evenly provided on one side of the high-temperature sealing sleeve 201. The plurality of dynamic sealing teeth 202 match the annular teeth 104, and the plurality of dynamic sealing teeth 202 and the plurality of annular teeth 104 are staggered to form a labyrinth seal; Figure 5-7 、 Figure 9 and Figure 15As shown, a high-pressure ventilation groove 203 is provided on one side of the high-temperature sealing sleeve 201, and the position of the high-pressure ventilation groove 203 corresponds to the position of the high-pressure air inlet groove 106. The air curtain formed by the high-pressure air nozzle 115 and the high-pressure ventilation groove 203 and the radially outermost outlet of the labyrinth seal together form an air curtain sealing chamber 207; a high-pressure return air ring 206 is provided at the inner diameter of the high-temperature sealing sleeve 201, and a plurality of air hole channels 203-1 are evenly provided on the high-pressure return air ring 206, and one end of each air hole channel 203-1 is connected to the high-pressure ventilation groove 203. The normal temperature and high-pressure gas at the high-pressure gas source enters the high-pressure ventilation groove 203 after passing through the high-pressure vent hole 106-1, the high-pressure air inlet groove 106, and the high-pressure air nozzle 115, forming a high-speed air curtain between the high-pressure air nozzle 115 and the high-pressure ventilation groove 203, and the gas inside the inner sleeve 101 is vented by the high-speed air curtain. Curtain seal; the high-temperature, high-pressure gas inside the rotary kiln 7 enters the air curtain sealing chamber 207 after being depressurized and cooled by the labyrinth seal. Under the action of the high-speed air curtain, the gas in the air curtain sealing chamber 207 quickly enters the high-pressure ventilation groove 203 and the air hole channel 203-1 with the high-speed air curtain gas, and then gathers into the high-pressure return air ring 206 to re-enter the interior of the rotary kiln 7 to play an auxiliary sealing role. At the same time, the lower-temperature mixed gas formed by the sealed gas and the high-speed air curtain gas inside the air curtain sealing chamber 207 passes through the high-pressure ventilation groove 203 and the air hole channel 203-1 from the outside to the inside along the radial direction of the high-temperature sealing sleeve 201, and then gathers into the high-pressure return air ring 206 to re-enter the rotary kiln 7. In the process, the mixed gas exchanges heat with the high-temperature and high-pressure gas that diffuses radially from the inside to the outside of the heat dissipation ring 102 at the front of the labyrinth gap, thereby further reducing the temperature of the sealed gas before it reaches the air curtain seal. It should be noted that the outlet pressure of the high-pressure return air ring 206 must be greater than the operating pressure inside the rotary kiln 7 to ensure that the gas inside the rotary kiln 7 does not leak through the high-pressure return air ring 206, the air hole channel 203-1, and the high-pressure vent groove 203. During this process, the gas in the air curtain sealed chamber 207, after being depressurized and cooled by the labyrinth seal, is rapidly brought back to the rotary kiln 7 by the gas from the high-speed air curtain. At the same time, the heat of the high-temperature gas, after being depressurized and cooled by the labyrinth seal, is also brought back to the interior of the rotary kiln 7. This not only improves the utilization rate of heat, but also reduces the temperature of the sealed gas in the magnetic fluid sealed chamber 113 formed between the air curtain seal and the magnetic fluid seal to room temperature, effectively overcoming the defect that the magnetic fluid is not resistant to high temperatures.Furthermore, although the high-speed air curtain cools the sealed gas in the air curtain sealing chamber 207 to room temperature, a small amount of gas inevitably flows through the high-speed air curtain into the magnetic fluid sealing chamber 113, gradually increasing the pressure of the magnetic fluid sealing chamber 113. This process continues until the internal pressure of the magnetic fluid sealing chamber 113 is nearly equal to the pressure of the sealed gas in the air curtain sealing chamber 207 before the air curtain sealing. At this point, the internal gas of the magnetic fluid sealing chamber 113 that needs to be sealed by the magnetic fluid is converted to a mixture of the high-speed air curtain gas and a very small amount of hydrogen, achieving zero leakage sealing after the magnetic fluid sealing. Although there may be a very small amount of gas leakage, the risk of hydrogen leakage and air explosion is greatly reduced.

[0050] In addition, if Figure 4-6 and Figure 10 As shown, a moving pole shoe 204 is connected to the outer diameter of one side of the high-temperature sealing sleeve 201. The moving pole shoe 204 is sleeved on the outside of the static pole shoe 108, and there is a gap between the moving pole shoe 204 and the static pole shoe 108. One end of the moving pole shoe 204 extends to the inside of the magnetic fluid tank 109, and the end of the moving pole shoe 204 extends below the liquid surface of the magnetic fluid to form a magnetic fluid seal. Pole teeth 205 are provided at the radial and axial positions of the end of the moving pole shoe 204. In this embodiment, as shown in FIG. Figure 10 As shown, the moving pole piece 204 is a two-petal structure with the same structure; Figure 1 、 Figure 4-6 As shown, the outer sleeve 114 is provided on the outer side of the moving pole shoe 204 and the static pole shoe 108. There is a gap between the moving pole shoe 204 and the outer sleeve 114. One end of the outer sleeve 114 is connected to the kiln head 701 or the kiln tail 702. The other end of the outer sleeve 114 is provided with a jet ring 116. The jet ring 116 is used to prevent external dust and air from passing through the gap between the outer sleeve 114 and the moving pole shoe 204 into the chamber formed by the outer sleeve 114, the static pole shoe 108 and the moving pole shoe 204 and the magnetic fluid tank 109, thereby preventing external dust and air from contaminating the magnetic fluid.

[0051] The high-pressure gas generated by the high-pressure gas source is an inert gas. Specifically, in this embodiment, the high-pressure gas generated by the high-pressure gas source is nitrogen.

[0052] Based on the above embodiment, the high-temperature hydrogen inside the kiln body 703 enters the interior of the inner sleeve 101 and flows along the inner sleeve 101 toward the cylinder body 703. At the same time, the high-temperature hydrogen in the inner sleeve 101 is buffered and depressurized by the labyrinth seal formed by the annular teeth 104 and the dynamic sealing teeth 202. At the same time, the coolant cools the high-temperature hydrogen in the gap area of ​​the labyrinth seal through the cooling groove 105; the leakage of the high-temperature hydrogen after buffering and cooling is further suppressed by the air curtain seal, and the high-temperature hydrogen is cooled by the high-speed nitrogen between the high-pressure air inlet groove 106 and the high-pressure ventilation groove 203. It should be noted that one side of the high-temperature sealing sleeve 201 is connected to the cylinder 703 of the rotary kiln 7, so the high-temperature and high-pressure hydrogen cannot leak to the outside of the rotary kiln 7 through the high-temperature sealing sleeve 201; after the air curtain seal, a magnetic fluid seal formed by a dynamic pole shoe 204, a static pole shoe 108, a magnetic fluid and an electromagnet 112 is provided, and the dynamic pole shoe 204 is provided with pole teeth 205 in the axial and radial directions respectively, which guide the magnetic fluid to form a stable sealing barrier under the action of the magnetic field of the electromagnet 112, thereby ensuring zero leakage of hydrogen in the rotary kiln; in the leakage channel between the rotating cylinder 703 and the kiln head 701 and the kiln tail 702, the hydrogen passes through the dynamic sealing teeth 202 on the high-temperature sealing sleeve 201 and the heat dissipation device 112. The labyrinth seal formed by the annular teeth 104 on the ring 102, when the hydrogen flows radially from the inside to the outside through the labyrinth seal, the coolant in the cooling cavity 103 cools the hydrogen passing through the labyrinth seal channel through the heat dissipation ring 102, thereby reducing the pressure and cooling the high-temperature and high-pressure hydrogen in the cylinder 703; after passing through the labyrinth seal, the hydrogen encounters a high-speed airflow barrier formed by the high-pressure air nozzle 115 and the high-pressure vent groove 203 on the high-temperature sealing sleeve 201, and the high-speed airflow formed by the room-temperature and high-pressure nitrogen quickly takes away the heat of the high-temperature hydrogen and returns it to the rotary kiln 7. The non-explosive mixed gas formed by a small amount of leaked hydrogen and a large amount of nitrogen is sealed by the magnetic fluid to achieve a zero-leakage safety sealing effect.

[0053] like Figure 2-18 As shown, an experimental test device for a hydrogen metallurgical zero-leakage combined sealing device is used to monitor the above-mentioned combined sealing device. The experimental test device includes a mounting base 3, and a sealing base 4 is provided on one side of the upper surface of the mounting base 3. The sealing base 4 is used to install the combined sealing device, that is, the inner sleeve 101, the heat dissipation ring 102 and one end of the outer sleeve 114 in the combined sealing device are all installed on one side of the sealing base 4, and the high-pressure vent hole 106-1, the high-temperature side wiring channel 102-1 and the low-temperature side wiring channel 102-2 on the heat dissipation ring 102 all pass through the sealing base 4 and are connected to the outside. A mounting port 401 is provided in the middle of the sealing base 4, and a closing cover 402 is provided at the mounting port 401, and the closing cover 402 corresponds to the position of the inner sleeve 101; the experimental test device also includes: a transmission component 5, a channel component 6 and a monitoring and control component.

[0054] Based on the above embodiment, the experimental testing device is only used to monitor the combined sealing device formed by the static connection part 1 and the dynamic connection part 2. During the monitoring of the combined sealing device, the static connection part 1 is installed on one side of the sealing base 4, and the sealing base 4 replaces the kiln head 701 or the kiln tail 702 of the rotary kiln 7. The dynamic connection part 2 is installed on one side of the transmission assembly 5, and the transmission assembly 5 replaces the cylinder 703 of the rotary kiln 7.

[0055] Among them, Figure 2 and Figure 5-6 As shown, the transmission assembly 5 includes a motor 501 and a bearing seat 508. The motor 501 and the bearing seat 508 are both arranged on the mounting base 3. The output end of the motor 501 is connected to the torque sensor 503 through the coupling 502. One end of the torque sensor 503 is connected to the coupling insulation hub 505 through the roller coupling adapter 504. The outer sleeve of the coupling insulation hub 505 is provided with a motor insulation flange 506. One end of the motor insulation flange 506 is connected to the high-temperature sealing sleeve 201 in the combined sealing device, and a sealing sleeve insulation layer 507 is provided between the motor insulation flange 506 and the high-temperature sealing sleeve 201. The outer sleeve of the motor insulation flange 506 is provided with a bearing insulation hub 509. The bearing insulation hub 509 is provided in the bearing seat 508 through a bearing.

[0056] Based on the above embodiment, when the motor 501 drives the coupling 502 to rotate, the coupling 502 drives the high-temperature sealing sleeve 201 to rotate through the torque sensor 503, the roller coupling adapter 504, the coupling insulation hub 505 and the motor insulation flange 506. During this process, the torque sensor 503 is used to monitor the torque and speed of the high-temperature sealing sleeve 201.

[0057] In this embodiment, if Figure 6 、 Figure 8 and Figure 11-18 As shown, the channel assembly 6 includes a filling hole 601, a return air hole 614, a process simulation sealing cavity temperature monitoring port 602 and a process simulation sealing cavity pressure monitoring port 603 arranged on the closing cover 402, a coolant injection port 604 and a coolant discharge port 605, a magnetic fluid injection port 606 and a magnetic fluid discharge port 607, a magnetic fluid temperature monitoring port 608 and a magnetic fluid pressure monitoring port 609 arranged on the sealing base, a coolant injection channel 604-1 and a coolant discharge channel 605-1, a magnetic fluid injection channel 606-1 and a magnetic fluid discharge channel 607-1, a magnetic fluid temperature monitoring inlet 608-1 and a magnetic fluid pressure monitoring inlet 609-1 arranged on the heat dissipation ring 102, a magnetic fluid temperature monitoring through hole 608-2 and a magnetic fluid pressure monitoring through hole arranged on the low-temperature side cover plate 111, and a magnetic fluid temperature monitoring channel 608-3 and a magnetic fluid pressure monitoring channel arranged on the static pole shoe 108, as shown in FIG. Figure 11-12、 Figure 8 and Figure 17 As shown; among them, Figure 6 As shown, high-temperature and high-pressure gas is injected into the inner sleeve 101 through the filling hole 601, and the high-temperature and high-pressure gas enters the external high-temperature and high-pressure gas generating device through the return hole 614 to form circulating gas, so that the temperature and pressure of the process simulation sealing cavity 403 formed by the installation port 401, the closing cover 402, the static connection part 1 and the dynamic connection part 2 are always maintained at the set pressure and temperature; Figure 16 As shown, the cooling liquid injection port 604 and the cooling liquid discharge port 605 are connected to the cooling cavity 103 through the cooling liquid injection channel 604-1 and the cooling liquid discharge channel 605-1 respectively. The cooling liquid injection device injects cooling liquid into the interior of the cooling cavity 103 through the cooling liquid injection port 604 and the cooling liquid injection channel 604-1, and the cooling liquid is discharged from the interior of the cooling cavity 103 through the cooling liquid discharge channel 605-1 and the cooling liquid discharge port 605; Figure 4 and Figure 6 As shown, one end of the magnetic fluid injection channel 606-1 and the magnetic fluid discharge channel 607-1 are respectively connected to the magnetic fluid injection port 606 and the magnetic fluid discharge port 607, and the other ends of the magnetic fluid injection channel 606-1 and the magnetic fluid discharge channel 607-1 are both connected to the magnetic fluid tank 109 through the magnetic fluid through hole 109-1 opened on the static pole shoe 108. The magnetic fluid injection device injects magnetic fluid into the interior of the magnetic fluid tank 109 through the magnetic fluid injection port 606, the magnetic fluid injection channel 606-1 and the magnetic fluid through hole 109-1, and the magnetic fluid is discharged from the interior of the magnetic fluid tank 109 through the magnetic fluid through hole 109-1, the magnetic fluid discharge channel 607-1 and the magnetic fluid discharge port 607; as shown Figure 8 、 Figure 12 and Figure 17 As shown, the magnetic fluid temperature monitoring port 608 is connected to the magnetic fluid tank 109 through the magnetic fluid temperature monitoring inlet 608-1, the magnetic fluid temperature monitoring through-hole 608-2 and the magnetic fluid temperature monitoring channel 608-3, and the magnetic fluid pressure monitoring port 609 is connected to the magnetic fluid tank 109 through the magnetic fluid pressure monitoring inlet 609-1, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel. Specifically in this embodiment, the channel structure formed by the magnetic fluid pressure monitoring port 609, the magnetic fluid pressure monitoring inlet 609-1, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel is the same as the channel structure formed by the magnetic fluid temperature monitoring port 608, the magnetic fluid temperature monitoring inlet 608-1, the magnetic fluid temperature monitoring through-hole 608-2 and the magnetic fluid temperature monitoring channel 608-3.

[0058] Specifically, such as Figure 4 、 Figure 8 、 Figure 12 and Figure 18As shown, the channel assembly 6 also includes a first gas temperature monitoring port 610, a first gas pressure monitoring port 612, a second gas temperature monitoring port 611, and a second gas pressure monitoring port 613 arranged on the sealing base 4, a first gas temperature monitoring channel 610-1, a second gas pressure monitoring channel 613-1, and a second gas temperature monitoring channel 611-1, a second gas pressure monitoring channel 613-1 arranged on the heat dissipation ring 102, a gas temperature monitoring inlet 611-2 and a gas pressure monitoring inlet arranged on the low-temperature side cover plate 111, and a gas temperature monitoring inlet 611-2 and a gas pressure monitoring inlet arranged on the high-temperature side cover plate 110. The measuring outlet 611-4 and the gas pressure monitoring outlet are provided, and the gas temperature monitoring through hole 611-3 and the gas pressure monitoring through hole are provided on the static pole shoe 108; wherein, one end of the first gas temperature monitoring channel 610-1 is connected with the first gas temperature monitoring port 610, and one end of the first gas pressure monitoring channel 612-1 is connected with the first gas pressure monitoring port 612, and the other end of the first gas pressure monitoring channel 612-1 and the first gas temperature monitoring channel 610-1 are both provided between the annular gear 104 and the high-pressure air inlet groove 106 for monitoring the pressure and temperature before the air curtain is sealed to test the cooling and the cooling of the cooling chamber. The second gas temperature monitoring port 611 is connected to the gas temperature monitoring outlet 611-4 through the second gas temperature monitoring channel 611-1, the gas temperature monitoring inlet 611-2 and the gas temperature monitoring through-hole 611-3, and the second gas pressure monitoring port 613 is connected to the gas pressure monitoring outlet through the second gas pressure monitoring channel 613-1, the gas pressure monitoring inlet and the gas pressure monitoring through-hole for monitoring the pressure and temperature before the magnetic fluid seal to test the cooling and sealing effect of the air curtain seal; specifically, in this embodiment, the first gas pressure monitoring port 612, the first gas pressure monitoring port 613 and the first gas pressure monitoring port 613 are ... The channel structure formed by the measuring channel 612-1 is the same as the channel structure formed by the first gas temperature monitoring port 610 and the first gas temperature monitoring channel 610-1. Similarly, the channel structure formed by the second gas pressure monitoring port 613, the second gas pressure monitoring channel 613-1, the gas pressure monitoring inlet, the gas pressure monitoring through hole, and the gas pressure monitoring outlet is the same as the channel structure formed by the second gas temperature monitoring port 611, the second gas temperature monitoring channel 611-1, the gas temperature monitoring inlet 611-2, the gas temperature monitoring through hole 611-3, and the gas temperature monitoring outlet 611-4.

[0059] Among them, the monitoring and control components include a power supply, a high-temperature gas source, a motor controller, a process simulation sealing chamber temperature sensor and a process simulation sealing chamber pressure sensor, a magnetic fluid temperature sensor and a magnetic fluid pressure sensor; the power supply is connected to the two coils 112-2 in the combined sealing device, the high-temperature gas source is provided at the filling hole 601 and the return air hole 614, and the motor controller controls the start and stop and speed of the motor 501; the process simulation sealing chamber temperature sensor and the process simulation sealing chamber pressure sensor respectively monitor the temperature and Pressure is monitored; the magnetic fluid temperature sensor and the magnetic fluid pressure sensor are respectively arranged at the magnetic fluid temperature monitoring port 608 and the magnetic fluid pressure monitoring port 609. The magnetic fluid temperature sensor monitors the temperature of the magnetic fluid inside the magnetic fluid tank 109 through the magnetic fluid temperature monitoring port 608, the magnetic fluid temperature monitoring inlet 608-1, the magnetic fluid temperature monitoring through-hole 608-2 and the magnetic fluid temperature monitoring channel 608-3. The magnetic fluid pressure sensor monitors the pressure of the magnetic fluid inside the magnetic fluid tank 109 through the magnetic fluid pressure monitoring port 609, the magnetic fluid pressure monitoring inlet 609-1, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel.

[0060] Specifically, the monitoring and control component also includes a first gas temperature sensor, a first gas pressure sensor, a second gas temperature sensor, and a second gas pressure sensor, wherein the first gas temperature sensor is provided at the first gas temperature monitoring port 610, and the gas temperature entering the air curtain sealing chamber 207 after passing through the labyrinth seal and cooling heat exchange is monitored through the first gas temperature sensor, the first gas temperature monitoring port 610, and the first gas temperature monitoring channel 610-1; the first gas pressure is provided at the first gas pressure monitoring port, and the gas pressure entering the air curtain sealing chamber 207 is monitored through the first gas pressure sensor, the first gas pressure monitoring port, and the first gas pressure monitoring channel 612-1; the second gas temperature The sensor is provided at the second gas temperature monitoring port 611, and the temperature of the gas entering the magnetic fluid sealing cavity 113 after the air curtain sealing is monitored through the second gas temperature sensor, the second gas temperature monitoring port 611, the second gas temperature monitoring channel 611-1, the gas temperature monitoring inlet 611-2, the gas temperature monitoring through-hole 611-3 and the gas temperature monitoring outlet 611-4; the second gas pressure sensor is provided at the second gas pressure monitoring port 613, and the pressure of the gas entering the magnetic fluid sealing cavity 113 is monitored through the second gas pressure sensor, the second gas pressure monitoring port, the second gas pressure monitoring channel 613-1, the gas pressure monitoring inlet, the gas pressure monitoring through-hole and the gas pressure monitoring outlet.

[0061] Based on the above embodiment, a simulated metallurgical gas atmosphere of a certain pressure and temperature is formed inside the process simulation sealed cavity 403 through the gas source generating device, the filling hole 601 and the return gas hole 614, and the temperature and pressure of the high-temperature hydrogen in the process simulation sealed cavity 403 are monitored by the process simulation sealed cavity temperature sensor and the process simulation sealed cavity pressure sensor; coolant is injected into the interior of the cooling cavity 103 through the coolant injection device, and magnetic fluid is injected into the interior of the magnetic fluid tank 109 through the magnetic fluid injection device, and the temperature and pressure of the magnetic fluid in the magnetic fluid tank 109 are monitored by the magnetic fluid temperature sensor and the magnetic fluid pressure sensor; the temperature of the hydrogen entering the air curtain sealed cavity 207 after being buffered and cooled by the labyrinth seal is monitored by the first gas temperature sensor, and the temperature of the hydrogen entering the magnetic fluid sealed cavity 113 after being cooled by the air curtain seal is monitored by the second gas temperature sensor.

[0062] It should be noted that, in this embodiment, a gas sealing ring 8 , a coolant sealing ring 9 and a magnetic fluid sealing ring 10 are further provided.

[0063] Among them, a gas sealing ring 8 is provided on the side wall where the sealing base 4 contacts the closing cover 402 and the side wall where the sealing base 4 contacts the cooling cover 107. The gas sealing ring 8 provided on the sealing base 4 prevents the gas in the process simulation sealing cavity 403 from escaping to the external environment from between the sealing base 4 and the closing cover 402 and the side wall where the sealing base 4 contacts the cooling cover 107. The gas sealing ring 8 provided on the sealing sleeve insulation layer 507 is located on the side wall where the sealing sleeve contacts the high-temperature sealing sleeve 201. Prevent gas from leaking from between the sealing sleeve insulation layer 507 and the high-temperature sealing sleeve 201; a gas sealing ring 8 is provided on the side wall where the heat dissipation ring 102 contacts the high-temperature side cover plate 110, and the gas sealing ring 8 here prevents gas from escaping to the inside of the high-temperature side placement groove; a gas sealing ring 8 is provided on the side wall where the high-temperature sealing sleeve 201 contacts the dynamic pole shoe 204, and the gas sealing ring 8 here prevents gas from escaping directly from the high-temperature sealing sleeve 201 and the dynamic pole shoe 204 to the external environment; In addition, due to the high-pressure ventilation on the heat dissipation ring 102 The hole 106-1 passes through the sealing base 4 and is connected to the outside. In order to prevent the gas in the high-pressure vent hole 106-1 from escaping from between the sealing base 4 and the heat dissipation ring 102 to the outside of the high-pressure vent hole 106-1, a gas sealing ring 8 is provided at the end of the high-pressure vent hole 106-1 on the heat dissipation ring 102. The gas sealing ring 8 here is provided on the sealing base 4; the first gas temperature monitoring channel 610-1 passes through the heat dissipation ring 102 and is connected to the first gas temperature monitoring port 610, and the first gas pressure monitoring channel 612-1 passes through the heat dissipation ring 102 and is connected to the first gas temperature monitoring port 610. It is connected to the first gas pressure monitoring port 612. To prevent gas from escaping from the channel structure formed by the first gas temperature monitoring port 610 and the first gas temperature monitoring channel 610-1, and from the channel structure formed by the first gas pressure monitoring port 612 and the first gas pressure monitoring channel 612-1, a gas sealing ring 8 is provided at the end of the first gas temperature monitoring channel 610-1 connected to the first gas temperature monitoring port 610, and at the end of the first gas pressure monitoring channel 612-1 connected to the first gas pressure monitoring port 612.The second gas temperature monitoring port 611 is connected to the magnetic fluid sealing cavity 113 through the channel structure formed by the second gas temperature monitoring channel 611-1, the gas temperature monitoring inlet 611-2, the gas temperature monitoring through hole 611-3 and the gas temperature monitoring outlet 611-4. The second gas pressure monitoring port 613, the second gas pressure monitoring channel 613-1, the gas pressure monitoring inlet, the gas pressure monitoring through hole and the gas pressure monitoring outlet form the same channel structure as the second gas temperature monitoring port 611, the second gas temperature monitoring channel 611-1, the gas temperature monitoring inlet 611-2, the gas temperature monitoring through hole 611-3 and the gas temperature monitoring outlet 611-4. To prevent gas within the magnetic fluid sealed cavity 113 from escaping through the channel structure formed by the second gas pressure monitoring port 613, the second gas pressure monitoring channel 613-1, the gas pressure monitoring inlet, the gas pressure monitoring through hole, and the gas pressure monitoring outlet, as well as the channel structure formed by the second gas temperature monitoring port 611, the second gas temperature monitoring channel 611-1, the gas temperature monitoring inlet 611-2, the gas temperature monitoring through hole 611-3, and the gas temperature monitoring outlet 611-4, gas sealing rings 8 are provided at both ends of the second gas temperature monitoring channel 611-1, the second gas pressure monitoring channel 613-1, the gas temperature monitoring through hole 611-3, and the gas pressure monitoring through hole.

[0064] A coolant sealing ring 9 is provided on the side wall where the heat dissipation ring 102 contacts the inner sleeve 101. The coolant sealing ring 9 on the cooling cover plate 107 is provided between the coolant sealing ring 9 and the inner sleeve 101 as well as between the coolant sealing ring 9 and the heat dissipation ring 102. The coolant sealing ring 9 between the heat dissipation ring 102 and the inner sleeve 101 and the coolant sealing ring 9 on the cooling cover plate 107 prevent the coolant inside the cooling cavity 103 from flowing out from between the inner sleeve 101 and the heat dissipation ring 102, between the inner sleeve 101 and the cooling cover plate 107, and between the heat dissipation ring 102 and the cooling cover plate 107. In addition, Since the coolant injection device injects coolant into the interior of the cooling cavity 103 through the coolant injection port 604 and the coolant injection channel 604-1, the coolant inside the cooling cavity 103 flows out through the coolant discharge channel 605-1 and the coolant discharge port 605. In order to prevent the coolant from flowing out from between the sealing base 4 and the heat dissipation ring 102, a coolant sealing ring 9 is provided at one end of the coolant injection port 604 connected to the coolant injection channel 604-1 and at one end of the coolant discharge port 605 connected to the coolant discharge channel 605-1.

[0065] Since the magnetic fluid injection device injects magnetic fluid into the interior of the magnetic fluid tank 109 through the magnetic fluid injection port 606, the magnetic fluid injection channel 606-1 and the magnetic fluid through-hole 109-1, the magnetic fluid in the magnetic fluid tank 109 is discharged through the magnetic fluid through-hole 109-1, the magnetic fluid discharge channel 607-1 and the magnetic fluid discharge port 607, in order to prevent the magnetic fluid in the magnetic fluid tank 109 from flowing out from the interior of the channel structure formed by the magnetic fluid injection port 606 and the magnetic fluid injection channel 606-1, and the channel structure formed by the magnetic fluid discharge port 607 and the magnetic fluid discharge channel 607-1, a magnetic fluid sealing ring 10 is provided at both ends of the magnetic fluid injection channel 606-1 and the magnetic fluid discharge channel 607-1; at the same time, the magnetic fluid temperature monitoring port 608 is connected to the magnetic fluid tank 109 through the magnetic fluid temperature monitoring port 608-1, the magnetic fluid temperature monitoring through-hole 608-2 and the magnetic fluid temperature monitoring channel 608-3, and the magnetic fluid pressure monitoring port 609 is connected to the magnetic fluid tank 109 through the magnetic fluid temperature monitoring port 608-1, the magnetic fluid temperature monitoring through-hole 608-2 and the magnetic fluid temperature monitoring channel 608-3. The magnetic fluid pressure monitoring inlet 609-1, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel are connected to the magnetic fluid tank 109. In order to prevent the magnetic fluid in the magnetic fluid tank 109 from flowing out from the channel structure formed by the magnetic fluid temperature monitoring port 608, the magnetic fluid temperature monitoring inlet 608-1, the magnetic fluid temperature monitoring through-hole 608-2 and the magnetic fluid temperature monitoring channel 608-3, and the channel structure formed by the magnetic fluid pressure monitoring port 609, the magnetic fluid pressure monitoring inlet 609-1, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel, a magnetic fluid sealing ring 10 is provided at one end of the magnetic fluid temperature monitoring inlet 608-1 connected to the magnetic fluid temperature monitoring port 608, one end of the magnetic fluid temperature monitoring channel 608-3 connected to the magnetic fluid temperature monitoring through-hole 608-2, one end of the magnetic fluid pressure monitoring inlet connected to the magnetic fluid pressure monitoring port 609, and one end of the magnetic fluid pressure monitoring channel connected to the magnetic fluid pressure monitoring through-hole.

[0066] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The hydrogen metallurgical zero leakage combined sealing device is installed between the kiln body and the kiln head and between the kiln body and the kiln tail of the rotary kiln, and is characterized by: The combined sealing device comprises: The static connection part is installed on the kiln head or kiln tail of the rotary kiln, and the static connection part includes an inner sleeve, one end of the inner sleeve is installed on the kiln head or kiln tail, and one end face of the inner sleeve is supported by a heat dissipation ring, one end of the heat dissipation ring is connected to the end of the inner sleeve, and the other end of the heat dissipation ring is installed on the kiln head or kiln tail, and a plurality of annular teeth are evenly arranged on the outer wall of one side of the heat dissipation ring; a high-pressure air inlet groove is provided on one side of the high-pressure air inlet groove, and a high-pressure air nozzle is provided on one side of the high-pressure air inlet groove, which is connected to the high-pressure air nozzle, and one side of the high-pressure air nozzle is connected to the end face of one side of the heat dissipation ring, and the high-pressure air nozzle is arranged on the outside of the annular teeth, and a plurality of high-pressure vents are evenly provided on the heat dissipation ring, and the plurality of high-pressure vents are connected to the high-pressure air inlet groove and the high-pressure gas source; a high-temperature side wiring channel and a low-temperature side wiring channel are provided on the heat dissipation ring. The heat dissipation ring is provided with a static pole shoe on the outside, a magnetic fluid groove is provided on the static pole shoe, and magnetic fluid is provided in the magnetic fluid groove. A high-temperature side placement groove and a low-temperature side placement groove are respectively provided at both ends of the static pole shoe. An iron core ring and a coil are provided in the high-temperature side placement groove and the low-temperature side placement groove. The openings of the high-temperature side placement groove and the low-temperature side placement groove are respectively connected to the high-temperature side cover plate and the low-temperature side cover plate. A high-temperature side wiring port and a low-temperature side wiring port are respectively provided on the high-temperature side cover plate and the low-temperature side cover plate. The coil in the high-temperature side placement groove is connected to the external power supply through the high-temperature side wiring port and the high-temperature side wiring channel. The coil in the low-temperature side placement groove is connected to the external power supply through the low-temperature side wiring port and the low-temperature side wiring channel. Each coil connected to the power supply forms an electromagnet together with its corresponding iron core ring; The dynamic connection part is arranged on one side of the static connection part, and the dynamic connection part includes a high-temperature sealing sleeve, which is arranged on the cylinder of the rotary kiln. A plurality of dynamic sealing teeth are evenly arranged on one side of the high-temperature sealing sleeve, and a plurality of the dynamic sealing teeth correspond to the annular teeth, and a plurality of dynamic sealing teeth and a plurality of annular teeth are staggered to form a labyrinth seal; a high-pressure ventilation groove is provided on one side of the high-temperature sealing sleeve, and the position of the high-pressure ventilation groove corresponds to the position of the high-pressure air inlet groove. The air curtain formed by the high-pressure air jet nozzle and the high-pressure ventilation groove and the radially outermost outlet of the labyrinth seal jointly form an air curtain sealing cavity; a high-pressure return air ring is provided at the inner diameter of the high-temperature sealing sleeve, and a plurality of air hole channels are evenly provided on the high-pressure return air ring, and the air hole channels are One end of the channel is connected to the high-pressure ventilation groove, and the high-pressure gas at the high-pressure gas source enters the high-pressure ventilation groove through the high-pressure vent hole and the high-pressure air inlet groove, and forms an air curtain between the high-pressure air inlet groove and the high-pressure ventilation groove. The gas inside the inner sleeve is sealed by the air curtain, and the high-pressure gas in the high-pressure ventilation groove enters the interior of the high-temperature sealing sleeve and the inner sleeve through the air hole channel; a moving pole shoe is connected to the outer diameter of one side of the high-temperature sealing sleeve, and the moving pole shoe is sleeved on the outside of the static pole shoe. One end of the moving pole shoe extends to the interior of the magnetic fluid groove, and the end of the moving pole shoe extends below the liquid surface of the magnetic fluid to form a magnetic fluid seal. In addition, the side wall of the moving pole shoe, the side wall of the static pole shoe and the side wall of the high-temperature sealing sleeve together constitute a magnetic fluid sealing chamber.

2. The hydrogen metallurgy zero-leakage combined sealing device according to claim 1, characterized in that: The high-pressure gas generated by the high-pressure gas source is an inert gas.

3. The hydrogen metallurgy zero-leakage combined sealing device according to claim 2, characterized in that: The end face of the heat dissipation ring is fixed to the kiln head or the kiln tail and is connected to the inner sleeve through a cooling cover plate. A cooling liquid is provided in the cooling cavity formed by the heat dissipation ring, the inner sleeve and the cooling cover plate. A plurality of cooling grooves are evenly opened on the inner wall of the heat dissipation ring. The cooling grooves and the annular teeth are located on the same side wall of the heat dissipation ring. A plurality of the cooling grooves and the annular teeth are staggered and distributed, and a plurality of the cooling grooves are connected to the cooling cavity.

4. The hydrogen metallurgy zero-leakage combined sealing device according to claim 3, characterized in that: The outer sleeve is provided on the outside of the static pole shoe and the movable pole shoe, one end of the outer sleeve is connected to the kiln head or kiln tail of the rotary kiln, and the other end of the outer sleeve is provided with an air jet ring, which is used to prevent external dust and air from entering the interior of the magnetic fluid tank through the gap between the outer sleeve and the movable pole shoe.

5. The hydrogen metallurgy zero-leakage combined sealing device according to claim 4, characterized in that: The high-temperature side placement groove and the annular gear are located on the same side, and the high-temperature side placement groove and the low-temperature side placement groove are symmetrically arranged on both sides of the magnetic fluid groove.

6. The hydrogen metallurgy zero-leakage combined sealing device according to claim 5, characterized in that: Pole teeth are provided at radial and axial positions of the end of the moving pole shoe.

7. An experimental test device for a hydrogen metallurgical zero-leakage combined sealing device, used for monitoring the combined sealing device according to any one of claims 1 to 6, characterized in that: The mounting base comprises a sealing base provided on one side of the upper surface of the mounting base. The sealing base is used to install the combined sealing device, that is, the inner sleeve, the heat dissipation ring and one end of the outer sleeve in the combined sealing device are all installed on one side of the sealing base. The sealing base has a mounting opening in the middle, and a closing cover is provided at the mounting opening. The closing cover corresponds to the position of the inner sleeve. The experimental test setup also includes: A transmission assembly includes a motor and a bearing seat. The motor and the bearing seat are both arranged on a mounting base. The output end of the motor is connected to a torque sensor via a coupling. One end of the torque sensor is connected to a coupling heat-insulating hub via a roller coupling adapter. The outer sleeve of the coupling heat-insulating hub is provided with a motor heat-insulating flange. One end of the motor heat-insulating flange is connected to a high-temperature sealing sleeve in a combined sealing device. A sealing sleeve heat-insulating layer is provided between the motor heat-insulating flange and the high-temperature sealing sleeve. The outer sleeve of the motor heat-insulating flange is provided with a bearing heat-insulating hub. The bearing heat-insulating hub is provided in the bearing seat via a bearing. The channel assembly includes a filling hole and a return hole arranged on the closing cover, a process simulation sealing cavity temperature monitoring port and a process simulation sealing cavity pressure monitoring port, a magnetic fluid injection port and a magnetic fluid discharge port, a magnetic fluid temperature monitoring port and a magnetic fluid pressure monitoring port arranged on the sealing base, a magnetic fluid injection channel and a magnetic fluid discharge channel arranged on the heat dissipation ring, a magnetic fluid temperature monitoring inlet and a magnetic fluid pressure monitoring inlet, a magnetic fluid temperature monitoring through hole and a magnetic fluid pressure monitoring through hole arranged on the low-temperature side cover, and a magnetic fluid temperature monitoring channel and a magnetic fluid pressure monitoring channel arranged on the static pole shoe; wherein, high-temperature and high-pressure gas is injected into the interior of the inner sleeve through the filling hole, and the high-temperature and high-pressure gas enters the external high-temperature and high-pressure gas generating device through the return hole to form circulating gas, so that the installation port, the closing The temperature and pressure of the process simulation sealing chamber formed by the cover, the static connection part and the dynamic connection part always maintain the set pressure and temperature; one end of the magnetic fluid injection channel and the magnetic fluid discharge channel are connected to the magnetic fluid injection port and the magnetic fluid discharge port respectively, and the other ends of the magnetic fluid injection channel and the magnetic fluid discharge channel are connected to the magnetic fluid tank through the magnetic fluid through-hole opened on the static pole shoe, and the magnetic fluid injection device injects magnetic fluid into the interior of the magnetic fluid tank through the magnetic fluid injection port, the magnetic fluid injection channel and the magnetic fluid through-hole; the magnetic fluid temperature monitoring port is connected to the magnetic fluid tank through the magnetic fluid temperature monitoring inlet, the magnetic fluid temperature monitoring through-hole and the magnetic fluid temperature monitoring channel, and the magnetic fluid pressure monitoring port is connected to the magnetic fluid tank through the magnetic fluid pressure monitoring inlet, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel; The monitoring and control component includes a power supply, a high-temperature gas source, a motor controller, a process simulation sealing chamber temperature sensor and a process simulation sealing chamber pressure sensor, a magnetic fluid temperature sensor and a magnetic fluid pressure sensor; wherein the power supply is connected to the two coils in the combined sealing device, the high-temperature gas source is arranged at the filling hole, and the motor controller controls the start and stop and speed of the motor; the process simulation sealing chamber temperature sensor and the process simulation sealing chamber pressure sensor respectively monitor the temperature and pressure of the gas inside the inner sleeve through the process simulation sealing chamber temperature monitoring port and the process simulation sealing chamber pressure monitoring port; the magnetic fluid temperature sensor and the magnetic fluid pressure sensor are respectively arranged at the magnetic fluid temperature monitoring port and the magnetic fluid pressure monitoring port, the magnetic fluid temperature sensor monitors the temperature of the magnetic fluid inside the magnetic fluid tank through the magnetic fluid temperature monitoring port, the magnetic fluid temperature monitoring inlet, the magnetic fluid temperature monitoring through-hole and the magnetic fluid temperature monitoring channel, and the magnetic fluid pressure sensor monitors the pressure of the magnetic fluid inside the magnetic fluid tank through the magnetic fluid pressure monitoring port, the magnetic fluid pressure monitoring inlet, the magnetic fluid pressure monitoring through-hole and the magnetic fluid pressure monitoring channel.

8. The experimental test device for the hydrogen metallurgical zero-leakage combined sealing device according to claim 7, characterized in that: The channel assembly also includes a first gas temperature monitoring port, a first gas pressure monitoring port, a second gas temperature monitoring port, and a second gas pressure monitoring port arranged on the sealing base, a first gas temperature monitoring channel, a first gas pressure monitoring channel, a second gas temperature monitoring channel, and a second gas pressure monitoring channel arranged on the heat dissipation ring, a gas temperature monitoring inlet and a gas pressure monitoring inlet arranged on the low-temperature side cover plate, a gas temperature monitoring outlet and a gas pressure monitoring outlet arranged on the high-temperature side cover plate, and a gas temperature monitoring through-hole and a gas pressure monitoring through-hole arranged on the static pole shoe; wherein, one end of the first gas temperature monitoring channel is connected to the first gas temperature monitoring port, one end of the first gas pressure monitoring channel is connected to the first gas pressure monitoring port, and the other ends of the first gas pressure monitoring channel and the first gas temperature monitoring channel are both arranged between the annular tooth and the high-pressure air inlet groove; the second gas temperature monitoring port is connected to the gas temperature monitoring outlet through the second gas temperature monitoring channel, the gas temperature monitoring inlet and the gas temperature monitoring through-hole, and the second gas pressure monitoring port is connected to the gas pressure monitoring outlet through the second gas pressure monitoring channel, the gas pressure monitoring inlet and the gas pressure monitoring through-hole.

9. The experimental test device for the hydrogen metallurgical zero-leakage combined sealing device according to claim 8, characterized in that: The monitoring and control component also includes a first gas temperature sensor, a first gas pressure sensor, a second gas temperature sensor, and a second gas pressure sensor, wherein the first gas temperature sensor is arranged at the first gas temperature monitoring port, and monitors the gas temperature before entering the air curtain seal through the first gas temperature sensor, the first gas temperature monitoring port, and the first gas temperature monitoring channel; the first gas pressure is arranged at the first gas pressure monitoring port, and monitors the gas pressure before entering the air curtain seal through the first gas pressure sensor, the first gas pressure monitoring port, and the first gas pressure monitoring channel; the second gas temperature sensor is arranged at the second gas temperature monitoring port, and monitors the gas temperature entering the magnetic fluid sealing cavity through the second gas temperature sensor, the second gas temperature monitoring port, the second gas temperature monitoring channel, the gas temperature monitoring inlet, the gas temperature monitoring through-hole, and the gas temperature monitoring outlet; the second gas pressure sensor is arranged at the second gas pressure monitoring port, and monitors the gas pressure entering the magnetic fluid sealing cavity through the second gas pressure sensor, the second gas pressure monitoring port, the second gas pressure monitoring channel, the gas pressure monitoring inlet, the gas pressure monitoring through-hole, and the gas pressure monitoring outlet.

10. The experimental test device for the hydrogen metallurgical zero-leakage combined sealing device according to claim 7, characterized in that: The channel assembly also includes a coolant inlet and a coolant outlet arranged on the sealing base, and a coolant injection channel and a coolant outlet channel arranged on the heat dissipation ring; wherein the coolant inlet and the coolant outlet are respectively connected to the cooling cavity through the coolant injection channel and the coolant outlet channel, and the coolant injection device injects coolant into the interior of the cooling cavity through the coolant inlet and the coolant injection channel.

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