Feeding valve for high-temperature environment

Abstract

The invention provides a feeding valve for a high-temperature environment, which is composed of three parts including a water cooling assembly, a rotating assembly and a shell assembly which are arranged from inside to outside. Material conveying is achieved through a feeding port and a discharging port in a shell of the shell assembly, and a driving mechanism of the rotating assembly drives a rotor shaft to rotate and drives a material containing rotor to rotate, so that materials are evenly distributed in the shell, and bonded materials are crushed. Meanwhile, in order to conveniently cool the rotor shaft in the rotating process, the rotor shaft is designed into a hollow shaft form, a water inlet pipe of the water cooling assembly is arranged in the hollow part, cooling water is injected into the water inlet pipe through a water inlet of the rotating joint to cool the hollow part of the rotor shaft, and then the cooling water is discharged from a water outlet of the rotating joint; and cooling water continuously flows in and is discharged, so that effective cooling of the rotor shaft is realized.

Description

Technical Field

[0001] The present invention belongs to the field of metallurgical technology, and particularly relates to a feeding valve for high-temperature environments. Background Art

[0002] With the continuous increase in the country's advocacy for energy conservation and emission reduction, low-carbon metallurgical technology has emerged and developed rapidly. In the low-carbon metallurgical process, the shaft furnace plays a crucial role as the core equipment. The main processed product of the shaft furnace is high-temperature direct reduced iron pellets. After undergoing high-temperature reduction reactions, these pellets are discharged from the bottom of the shaft furnace together with a part of the gas, and the temperature of the discharged pellets is as high as about 700°C at this time.

[0003] In the subsequent processing flow of shaft furnace ironmaking, these high-temperature pellets need to enter the cooling equipment for cooling treatment first before they can continue to enter the downstream for further processing or treatment. The key to this connection process from the shaft furnace to the cooling system lies in the constant-speed feeding operation, which needs to be completed by the feeding valve. Therefore, the feeding valve undertakes an extremely important material conveying function in the entire shaft furnace ironmaking process.

[0004] In addition, besides high-temperature pellets and gas, the reaction products of the shaft furnace are also mixed with dust, which makes the materials discharged from the shaft furnace have a certain abrasiveness. Compared with the working environment of traditional blast furnaces, the shaft furnace used in low-carbon metallurgy has higher requirements for operating pressure, usually reaching 1 MPa - 2 MPa. This poses more stringent requirements for the feeding valve, which not only needs to have the characteristic of high-temperature resistance to cope with the high-temperature environment of about 700°C, but also must be able to withstand a relatively high working pressure, and at the same time have good wear resistance to resist the abrasion caused by the dust in the materials.

[0005] Under the existing technical conditions, conventional discharging devices can no longer meet these comprehensive requirements of the shaft furnace ironmaking process. Therefore, how to overcome the above technical defects is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a feeding valve for high-temperature environments, which can achieve effective temperature reduction.

[0007] To solve the above technical problems, the present invention provides a feeding valve for high-temperature environments, comprising:

[0008] A housing assembly, including a housing having an inner cavity, and a feed inlet and a discharge outlet communicating with the inner cavity are provided on the housing;

[0009] Rotating assembly, including a rotor shaft, a material-containing rotor arranged on the rotor shaft, and a driving mechanism. The rotor shaft is rotatably arranged in the inner cavity of the housing and extends out of the housing at both ends. One end of the rotor shaft is provided with a hollow cavity, and the other end is connected to the output end of the driving mechanism;

[0010] Water cooling assembly, including a water inlet pipe and a rotary joint. One end of the water inlet pipe is inserted into the hollow cavity of the rotor shaft, and the other end extends out of the outer side of the rotor shaft. The rotary joint is installed on the other end of the water inlet pipe. The water inlet of the rotary joint is connected to a cooling water pipeline, and the drain outlet is used to discharge cooling water.

[0011] Optionally, in the above-mentioned feeding valve for high-temperature environment, the material-containing rotor includes a rotor inner cylinder, two rotor end plates, a plurality of support plates and a plurality of horizontal plates;

[0012] The rotor inner cylinder is sleeved on the rotor shaft. The two rotor end plates are respectively arranged on both sides of the rotor inner cylinder. A plurality of the support plates are evenly spaced along the circumferential direction of the rotor inner cylinder. The horizontal plates are arranged at one end of the support plates away from the rotor inner cylinder. A material-containing space is formed between the rotor end plates, the support plates and the horizontal plates.

[0013] Optionally, in the above-mentioned feeding valve for high-temperature environment, the material-containing rotor further includes a plurality of partition plates, and the partition plates are arranged at intervals along the axial direction of the rotor inner cylinder to form a plurality of square grid-shaped material-containing spaces.

[0014] Optionally, in the above-mentioned feeding valve for high-temperature environment, the material-containing rotor further includes two spline connecting plates. The spline connecting plates are arranged on the outer sides of the rotor end plates, and convex splines matched with the spline grooves of the spline connecting plates are arranged at the corresponding positions of the rotor shaft;

[0015] And / or, a rotor retaining ring is respectively arranged on both sides of the material-containing rotor on the rotor shaft to limit the movement of the material-containing rotor on the rotor shaft.

[0016] Optionally, in the above-mentioned feeding valve for high-temperature environment, the connection between the rotary joint and the rotor shaft is a flexible insertion connection.

[0017] Optionally, in the above-mentioned feeding valve for high-temperature environment, the rotor shaft is made of 42CrMo steel bar;

[0018] And / or, the material-containing rotor is made of ZG 40 Cr 25 Ni 20 Si2 material;

[0019] And / or, a tungsten carbide wear-resistant surfacing layer is surfacing-welded on the surface of the material-containing rotor;

[0020] and / or, the housing is made of Q345R steel plate;

[0021] and / or, the inner surface of the housing is surfacing welded with a tungsten carbide wear-resistant surfacing layer;

[0022] and / or, the outer shell assembly is a central axisymmetric structure.

[0023] Optionally, in the above-mentioned feeding valve for high-temperature environment, the outer shell assembly further includes an equipment flange, a flange cover and a sealing plate;

[0024] The equipment flange is respectively sleeved at both openings where the housing is connected to the rotor shaft. The flange cover is hermetically connected to the outside of the equipment flange. An annular groove is formed on the outside of the flange cover. The sealing plate covers the annular groove of the flange cover to form a sealing cavity for water injection. A water injection port and a drain port communicating with the sealing cavity are formed on the sealing plate.

[0025] Optionally, in the above-mentioned feeding valve for high-temperature environment, the outer shell assembly further includes a sealing flange. The sealing flange is arranged between the rotor shaft, the equipment flange, the flange cover and the sealing plate, and the sealing flange is respectively welded to the flange cover and the sealing plate.

[0026] Optionally, in the above-mentioned feeding valve for high-temperature environment, a reserved gap is provided between the sealing flange and the rotor shaft. The reserved gap is filled with packing seal. A sealing gland is further sleeved on the rotor shaft, and the sealing gland is detachably installed on the sealing flange.

[0027] Optionally, in the above-mentioned feeding valve for high-temperature environment, an oil injection hole is formed on the sealing flange, and a sealing ring for preventing lubricating oil leakage is further arranged between the sealing gland and the rotor shaft.

[0028] Optionally, in the above-mentioned feeding valve for high-temperature environment, the outer shell assembly further includes a bearing seat for supporting the rotor shaft. The bearing seat is arranged outside the sealing flange and is fixed to the flange cover through a rib plate.

[0029] Optionally, in the above-mentioned feeding valve for high-temperature environment, the feed inlet of the outer shell assembly is eccentrically arranged.

[0030] Optionally, in the above-mentioned feeding valve for high-temperature environment, an inspection hole is arranged on the pipe wall of the feed inlet.

[0031] Optionally, in the above-mentioned feeding valve for high-temperature environment, the discharge port is formed with a tapered discharge pipe.

[0032] Optionally, in the above-mentioned feeding valve for high-temperature environment, two baffle seals are provided between the inner wall of the housing and the material-containing rotor, and the baffle seals are used to prevent materials from entering between the rotor shaft and the flange cover.

[0033] Optionally, in the above-mentioned feeding valve for high-temperature environment, a water jacket housing is sleeved outside the housing. A cooling water inlet and a cooling water outlet are provided on the water jacket housing. A cooling cavity is formed between the water jacket housing and the housing. A water jacket partition is provided in the cooling cavity between the cooling water inlet and the cooling water outlet.

[0034] Optionally, in the above-mentioned feeding valve for high-temperature environment, a number of flow guide plates are arranged in a staggered manner in the cooling cavity.

[0035] Optionally, in the above-mentioned feeding valve for high-temperature environment, a drain port is provided at the bottom of the water jacket housing, and a drain valve is provided on the drain port.

[0036] The present invention provides a feeding valve for high-temperature environment, and its beneficial effects are as follows:

[0037] Material transportation is realized through the feeding port and the discharging port on the housing of the housing assembly. The driving mechanism of the rotating assembly drives the rotor shaft to rotate, and drives the material-containing rotor to rotate to realize the uniform distribution of materials in the housing and the crushing of agglomerated materials. At the same time, in order to facilitate the cooling of the rotor shaft during rotation, the rotor shaft is designed in the form of a hollow shaft. The water inlet pipe of the water cooling assembly is arranged in the hollow part, and cooling water is injected into the water inlet pipe through the water inlet of the rotary joint to cool the hollow part of the rotor shaft, and then discharged from the drain port of the rotary joint. The cooling water continuously flows in and out, so as to effectively cool the rotor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0039] Figure 1 It is a schematic structural diagram of the main structures of the rotating assembly and the housing assembly provided by the embodiment of the present invention;

[0040] Figure 2 It is a schematic structural diagram of the rotor shaft and the water cooling assembly provided by the embodiment of the present invention;

[0041] Figure 3 It is a schematic structural diagram of the material-containing rotor provided by the embodiment of the present invention;

[0042] Figure 4 is the side view of Figure 3 ;

[0043] Figure 5 is the schematic structural view in the direction of A of Figure 1 ;

[0044] Figure 6 is the schematic structural view of the housing assembly provided by the embodiment of the present invention;

[0045] Figure 7 is the schematic structural view of the sealing flange provided by the embodiment of the present invention;

[0046] Figure 8 is the schematic structural view of the flange cover and the sealing plate provided by the embodiment of the present invention;

[0047] Figure 9 is the schematic structural view of the housing assembly provided by the embodiment of the present invention.

[0048] In the above figure:

[0049] Housing assembly: 110 - housing; 111 - feed inlet; 112 - discharge outlet; 113 - equipment flange; 120 - flange cover; 121 - water injection port; 122 - drain port; 131 - sealing plate; 132 - sealing flange; 1321 - oil injection hole; 140 - bearing seat; 150 - discharge pipe; 161 - inner cylinder; 162 - inspection hole; 170 - baffle plate seal; 180 - second support;

[0050] Rotating assembly: 210 - rotor shaft; 211 - connecting boss; 212 - sealing gland; 213 - rotating bearing; 214 - packing seal; 215 - coupling; 220 - material - holding rotor; 221 - inner cylinder of rotor; 222 - horizontal plate; 223 - rotor end plate; 224 - support plate; 225 - partition; 226 - spline connecting plate; 227 - rotor retaining ring; 230 - driving mechanism; 231 - first support; 232 - motor bracket;

[0051] Water - cooling assembly: 310 - water inlet pipe; 320 - rotary joint; 330 - water - jacket housing; 331 - liquid discharge port; 332 - deflector; 333 - cooling water inlet; 334 - cooling water outlet; 335 - water - jacket partition. Detailed implementation manners

[0052] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0053] In view of the technical defects in the prior art, and in view of the characteristics of the shaft furnace ironmaking process, it is particularly urgent and necessary to develop a new type of feeding valve. Therefore, the core of the present invention is to provide a feeding valve for high-temperature environments, which can achieve effective cooling.

[0054] In order to enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Specifically, please refer to Figure 1 - Figure 2 , a feeding valve for high-temperature environments provided by the present invention is composed of three parts, including a water-cooling component, a rotating component, and a housing component, which are arranged from the inside to the outside.

[0056] The housing component includes a housing 110 having an inner cavity. The housing 110 is provided with a feed inlet 111 and a discharge outlet 112 communicating with the inner cavity. The feed inlet 111, the inner cavity, and the discharge outlet 112 of the housing 110 form a material flow passage.

[0057] The rotating component includes a rotor shaft 210, a material-containing rotor 220, and a driving mechanism 230. Among them, the driving mechanism 230 is used to drive the rotor shaft 210 to rotate. The material-containing rotor 220 is arranged on the rotor shaft 210 and can rotate with the rotation of the rotor shaft 210. The material-containing rotor 220 can achieve uniform distribution of materials in the housing 110 and break up agglomerated materials. The rotor shaft 210 is rotatably arranged in the inner cavity of the housing 110 and extends out of the housing 110 at both ends. One end of the rotor shaft 210 is provided with a hollow cavity, and the other end is connected to the output end of the driving mechanism 230.

[0058] It should be noted that the rotational power requirement is calculated according to the required discharge amount, and then a rotor shaft 210 with a suitable diameter is selected. In addition to the rotor shaft 210, the material-containing rotor 220 is also a core component of the rotating component.

[0059] The water-cooling component includes a water inlet pipe 310 and a rotary joint 320. One end of the water inlet pipe 310 is inserted into the hollow cavity of the rotor shaft 210, and the other end extends out of the outside of the rotor shaft 210. The rotary joint 320 is installed on the other end of the water inlet pipe 310. The water inlet of the rotary joint 320 is connected to a cooling water pipeline. Cooling water is injected into the hollow cavity of the rotor shaft 210 through the water inlet of the rotary joint 320 via the water inlet pipe 310, and then discharged through the water outlet of the rotary joint 320.

[0060] As Figure 2As shown, after the rotor shaft 210 and the material-containing rotor 220 are assembled, one end of the rotor shaft 210 is connected to cooling water through a rotary joint 320, and a keyway is machined at the other end. An elastic pin coupling 215 is connected through a key. Then, the driving mechanism 230 is connected through the coupling 215 to ensure that the rotating assembly can adjust the rotational speed as required. The driving mechanism 230 can be a reduction motor. Of course, a motor bracket 232 can also be provided on the driving mechanism 230 to provide support. First supports 231 are provided on both sides of the motor bracket 232.

[0061] A feeding valve for a high-temperature environment provided by the present invention realizes material transportation through a feeding port 111 and a discharging port 112 on a housing 110 of a housing assembly. The driving mechanism 230 of the rotating assembly rotates the rotor shaft 210 and drives the material-containing rotor 220 to rotate to mix the materials evenly in the housing 110. At the same time, in order to facilitate cooling the rotor shaft 210 during rotation, the rotor shaft 210 is designed in the form of a hollow shaft. A water inlet pipe 310 of a water cooling assembly is arranged in the hollow part, and cooling water is injected into the water inlet pipe 310 through the water inlet of the rotary joint 320 to cool the hollow part of the rotor shaft 210, and then discharged from the water discharge port of the rotary joint 320. The cooling water continuously flows in and out, thereby effectively cooling the rotor shaft 210.

[0062] In a specific embodiment, as Figure 3 - Figure 4 shown, the material-containing rotor 220 includes a rotor inner cylinder 221, two rotor end plates 223, a plurality of support plates 224, and a plurality of horizontal plates 222. The rotor inner cylinder 221 is sleeved on the rotor shaft 210. The two rotor end plates 223 are respectively arranged on both sides of the rotor inner cylinder 221. The plurality of support plates 224 are evenly spaced along the circumferential direction of the rotor inner cylinder 221. The horizontal plates 222 are arranged at the ends of the support plates 224 far from the rotor inner cylinder 221. A material-containing space is formed between the rotor end plates 223, the support plates 224, and the horizontal plates 222. Pellets fall into the material-containing space during unloading. The horizontal plates 222 can be set to be consistent with the curved surface radian of the rotor inner cylinder 221, and a preset distance is provided between the assembled horizontal plates 222 and the inner wall of the housing 110. This preset distance enables the horizontal plates 222 to effectively break the adhered materials during the rotation of the rotating assembly. An opening capable of communicating with the material-containing space is formed between the circumferentially adjacent horizontal plates 222.

[0063] Furthermore, the material-containing rotor 220 further includes a plurality of partition plates 225, and the partition plates 225 are arranged at intervals along the axial direction of the rotor inner cylinder 221 to form a plurality of square material-containing spaces.

[0064] The material loading rotor 220 further includes two spline connecting plates 226 which are arranged on the outer side of the rotor end plate 223, and boss splines which are matched with the spline grooves of the spline connecting plates 226 are arranged at the relative positions of the rotor shaft 210.

[0065] Specifically, at least two connecting bosses 211 can be machined at the middle position of the rotor shaft 210, and boss splines are machined on the connecting bosses 211 to form a limiting structure. After the rotor end plate 223 and the spline connecting plates 226 are connected, spline grooves are machined on the spline connecting plates 226, the spline grooves are matched with the boss splines on the rotor shaft 210, and the rotor shaft 210 and the material loading rotor 220 are connected by splines.

[0066] To ensure the fixed position of the rotor shaft 210, a rotor retaining ring 227 is respectively arranged on both sides of the material loading rotor 220 for the rotor shaft 210. Specifically, the rotor retaining ring 227 can be fixed on the rotor shaft 210 with hexagon socket head cap screws to limit the movement of the material loading rotor 220 on the rotor shaft 210.

[0067] To improve the connection stability, the rotor inner cylinder 221 and the rotor end plate 223 can be connected by welding, the rotor end plate 223 and the spline connecting plates 226 are welded, and the partition plate 225 and the horizontal plate 222 are welded.

[0068] In a specific embodiment, the rotary joint 320 and the rotor shaft 210 are in a flexible insertion connection. When the rotor shaft 210 rotates, the rotary joint 320 can remain fixed, so that the cooling water pipeline can be fixed during the rotation of the rotor shaft 210. The flexible insertion connection can usually be realized by structures such as flange connection, clamp connection, rubber joint, bellows, etc. This connection method has excellent shock absorption performance and sound insulation effect, and can effectively absorb the displacement generated by pipeline deformation.

[0069] In a specific embodiment, the material of the rotor shaft 210 can be a high-quality 42CrMo steel bar. The material of the material loading rotor 220 is ZG 40 Cr 25 Ni 20 Si2. To reduce the wear of the rotor, a tungsten carbide wear-resistant surfacing layer is surfacing-welded on the surface of the material loading rotor 220. Specifically, the tungsten carbide wear-resistant surfacing layer is surfacing-welded on the surfaces of the partition plate 225, the support plate 224 and the horizontal plate 222.

[0070] The housing assembly is a central axisymmetric structure, which not only facilitates the installation and replacement of structural parts, but also reduces the types of special parts, reduces the manufacturing difficulty and lowers the manufacturing cost.

[0071] When the outer shell is working, it needs to withstand a pressure of 1 MPa - 2 MPa. Therefore, it is necessary to refer to the standards of pressure vessels for design. The shell 110 is made of Q345R steel plate, and the required thickness of the base layer is calculated according to the compressive strength. At the same time, in order to ensure wear resistance, a tungsten carbide wear-resistant surfacing layer is added to the inner surface of the shell 110. The HRC value of the surfacing layer is ≥ 60, and it should be evenly surfaced on the inner wall of the shell 110. All surfaces to be surfaced should be subjected to 100% PT inspection before surfacing, and the qualification level is Grade I. The surfaced shell 110 can withstand a certain degree of abrasion of pellets and dust and can withstand medium and low pressures.

[0072] On the basis of the above specific embodiments, the outer shell assembly further includes a device flange 113, a flange cover 120, and a sealing plate 131.

[0073] As Figure 6 and Figure 8 shown, the device flange 113 is sleeved on both sides of the opening where the shell 110 is connected to the rotor shaft 210. The flange cover 120 is hermetically connected to the outside of the device flange 113. An annular groove is opened on the outside of the flange cover 120. The sealing plate 131 covers the annular groove of the flange cover 120 to form a sealed cavity that can be filled with water. A water injection port 121 and a drain port 122 communicating with the sealed cavity are opened on the sealing plate 131. Specifically, because the application temperature of the valve is about 700 °C, a cooling device needs to be added to the surface of the flange cover 120. The water injection port 121 is opened at the lower part of the sealing plate 131 for water injection, and the drain port 122 is opened at the upper part for drainage. The flange cover 120 is cooled by continuously injecting and discharging cooling water.

[0074] The material of the device flange 113 can be 16Mn forging. The type of the flange cover 120 is a flat-welded plate flange. The device flange 113 is sleeved on the shell 110 and is hermetically welded by fillet welds inside and outside, and the outside is sealed by the flange cover 120. The surface of the flange cover 120 is welded to the sealing plate 131.

[0075] Furthermore, the outer shell assembly further includes a sealing flange 132, and the sealing flange 132 is arranged between the rotor shaft 210 and the device flange 113, the flange cover 120, and the sealing plate 131.

[0076] The sealing flange 132 can be made by machining a steel bar on a lathe, and its shape is stepped. One end of the sealing flange 132 is fixed on the sealing plate 131, and the other end extends inward and is stuck in the rotor retaining ring 227, playing a role in limiting the rotating assembly. The sealing flange 132 is welded to the flange cover 120 and the sealing plate 131 respectively, and can be removed together with the flange cover 120 when it needs to be disassembled. Thus, the sealing between the rotating assembly and the outer shell assembly is achieved through the sealing flange 132 and the sealing plate 131.

[0077] In addition, a number of stepped surfaces are machined on the rotor shaft 210 respectively to facilitate the installation of limiters and sealing connectors. For example, a gland 212 is also provided on the rotor shaft 210. There is a reserved gap between the sealing flange 132 and the rotor shaft 210, and a packing seal 214 is filled in the reserved gap. A gland 212 is also sleeved on the rotor shaft 210, and the outside of the packing seal 214 is pressed tightly by the gland 212. The gland 212 is detachably installed on the sealing flange 132, and specifically can be connected to the sealing flange 132 by bolts.

[0078] Such as Figure 7 As shown, according to the position of the packing seal on the shaft, an oil injection hole 1321 for introducing lubricating oil is provided on the sealing flange 132, and a sealing ring for preventing the leakage of lubricating oil is also provided between the gland 212 and the rotor shaft 210. During rotation, lubricating oil can be continuously injected into the reserved gap for lubrication. An O-shaped sealing ring is provided between the gland 212 and the rotor shaft 210 for sealing to prevent the leakage of lubricating oil. A protective bushing is provided between the packing seal 214 and the rotor shaft 210 to avoid direct wear and overheating of the rotor shaft 210 during rotation.

[0079] In a specific embodiment, the housing assembly further includes a bearing seat 140 for supporting the rotor shaft 210. Specifically, the specifications of the bearing seat 140 and the rotating bearing 213 can be determined according to the size of the rotor shaft 210. The bearing seat 140 is arranged on the outside of the sealing flange 132 and fixed to the flange cover 120 through a rib plate. The bearing seat 140 can be machined from a square thick steel plate. To facilitate the disassembly of the gland 212, a hole is opened in the middle of the bearing seat 140, and the size should be such that the gland 212 can be taken out. The bearing seat 140 and the rotating bearing 213 are connected and fixed by bolts.

[0080] In a specific embodiment, the feed inlet 111 of the housing assembly is eccentrically arranged. The discharge outlet 112 is opposite to the axis, while the feed inlet 111 uses an eccentric interface for feeding, and the opening position is on the same side as the rotation direction of the material-containing rotor 220. With the rotation of the material-containing rotor 220 and the movement inertia after the pellets enter, the accumulation of pellets can be avoided and the downward rolling can be accelerated. To facilitate the inspection of the jamming of the material-containing rotor 220 and the cleaning of the accumulated materials, an inspection hole 162 is opened on the pipe wall of the feed inlet 111. At the same time, to prevent the accumulation of materials in the inspection hole 162, a single-sided closed inner cylinder 161 is welded to the flange cover of the inspection hole 162. The inner cylinder 161 is filled with high-temperature resistant materials (such as high-temperature resistant ceramic fibers) before welding, and the flange cover of the inspection hole 162 after welding is similar to a plug structure.

[0081] The discharge outlet 112 is formed with a tapered discharge pipe 150, such as a conical design. On the one hand, it can increase the discharge area and prevent blockage. On the other hand, the sloped discharge outlet 112 can accelerate the discharge speed.

[0082] As shown Figure 5 in the figure, there are two baffle seals 170 provided between the inner wall of the housing 110 and the material-containing rotor 220. The baffle seals 170 are welded to the inner wall of the housing 110. The baffle seals 170 are used to prevent materials from entering and accumulating between the rotor shaft 210 and the flange cover 120, which may cause the rotor shaft 210 to be stuck. It can prevent the pellets from leaking between the material-containing rotor 220 and the inner wall of the housing 110 in the shutdown state, and effectively stop the material feeding.

[0083] To ensure the stable operation of the feeding valve in a high-temperature environment, in addition to selecting a temperature-resistant valve body material, a water-cooling component needs to be provided outside the housing assembly. The water-cooling component also includes a water jacket housing 330 and a water jacket partition 335.

[0084] As shown Figure 9 in the figure, a water jacket housing 330 is sleeved outside the housing 110. The water jacket housing 330 is provided with a cooling water inlet 333 and a cooling water outlet 334. A cooling cavity is formed between the water jacket housing 330 and the housing 110. A water jacket partition 335 is provided between the cooling water inlet 333 and the cooling water outlet 334 in the cooling cavity.

[0085] The water jacket housing 330 is processed from carbon steel plates and integrally wraps the housing 110 and a part of the pipe orifice according to the shape of the housing 110. The overall design temperature of the feeding valve is 300 °C. According to the heat transfer calculation, the required cooling water flow between the water jacket housing 330 and the housing 110 is determined, and then the gap between the water jacket housing 330 and the housing 110 is determined. The water jacket partition 335 is welded between the cooling water inlet 333 and the cooling water outlet 334, separating the cooling water inlet 333 and the cooling water outlet 334 through the water jacket partition 335. This can make the cooling water enter and first fill the water jacket housing 330 along one side downward, and then flow out from the cooling water outlet 334 on the other side at the top, so as to ensure that the cooling water is full and avoid structural short-circuit.

[0086] To improve the heat exchange effect, a number of flow guiding plates 332 are arranged in a staggered manner in the cooling cavity. Specifically, the staggered flow guiding plates 332 are welded between the water jacket housing 330 and the housing 110. The width of the flow guiding plate 332 is equal to the gap between the water jacket housing 330 and the housing 110. The flow guiding plates 332 should be welded before the processing of the water jacket housing 330. In this way, the flow guiding plates 332 can not only accelerate the flow of the cooling water, but also effectively support the water jacket housing 330.

[0087] A drain port 331 is provided at the bottom of the water jacket housing 330, and a drain valve is provided on the drain port 331 to facilitate the drainage of the cooling water during shutdown maintenance. A second support 180 is provided on the side of the water jacket housing 330 to provide an installation position.

[0088] The above is the structural introduction of the feeding valve provided in this case. The first valve designed according to this invention has been manufactured and has passed the temperature resistance test and the water pressure test acceptance. The flowing materials of the feeding valve provided in this case are not limited to direct reduced iron pellets, but also applicable to various solid and gas-solid two-phase material conveying environments. The water-cooling components can also be set or removed according to the temperature usage requirements, which has great application value and a relatively wide application range.

[0089] In summary, the feeding valve for high-temperature environments provided by the present invention can reach relatively high standards in terms of performance such as pressure resistance, high-temperature resistance, and wear resistance to adapt to the special working conditions of shaft furnace ironmaking. At the same time, in order to ensure the stable operation of the equipment and facilitate maintenance, it also needs to have a detachable and easy-to-repair structural feature, so as to effectively solve the technical problems faced by the feeding valve in shaft furnace ironmaking, meet the actual needs of the shaft furnace ironmaking process, and further promote the development and improvement of low-carbon metallurgy technology.

[0090] In the description of the present application, it should be understood that for the orientation description, such as the upper, lower, front, rear, left, right, etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 a limitation to the present application.

[0091] In the description of the present application, the meaning of "a plurality" is more than two. If the first and the second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0092] Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B can mean A or B; the "and / or" herein is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

[0093] In the description of the present application, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0094] In this specification, the various embodiments are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0095] In this article, specific examples are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principles of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A feeding valve for high temperature environment, characterized in that: include: A housing assembly comprises a housing (110) having an inner cavity, wherein the housing (110) is provided with an inlet (111) and an outlet (112) communicating with the inner cavity; A rotating assembly comprises a rotor shaft (210), a material holding rotor (220) disposed on the rotor shaft (210), and a driving mechanism (230); the rotor shaft (210) is rotatably disposed in the inner cavity of the shell (110) and has two ends extending out of the shell (110); one end of the rotor shaft (210) is provided with a hollow cavity, and the other end is connected to an output end of the driving mechanism (230); A water cooling component comprises a water inlet pipe (310) and a rotary joint (320), wherein one end of the water inlet pipe (310) is inserted into the hollow cavity of the rotor shaft (210), and the other end extends out of the rotor shaft (210); the rotary joint (320) is installed on the other end of the water inlet pipe (310); the water inlet of the rotary joint (320) is connected to a cooling water pipeline, and the drain port is used to discharge cooling water.

2. The feeding valve for high temperature environment according to claim 1, characterized in that: The material holding rotor (220) comprises a rotor inner cylinder (221), two rotor end plates (223), a plurality of support plates (224) and a plurality of horizontal plates (222); The rotor inner cylinder (221) is sleeved on the rotor shaft (210), the two rotor end plates (223) are respectively arranged on both sides of the rotor inner cylinder (221), a plurality of support plates (224) are evenly spaced along the circumference of the rotor inner cylinder (221), the horizontal plate (222) is arranged at one end of the support plate (224) away from the rotor inner cylinder (221), and a material holding space is formed between the rotor end plates (223), the support plates (224) and the horizontal plates (222).

3. The feeding valve for high temperature environment according to claim 2, characterized in that: The material holding rotor (220) further comprises a plurality of partitions (225), wherein the partitions (225) are arranged at intervals along the axial direction of the rotor inner cylinder (221) to form a plurality of square-shaped material holding spaces.

4. The feeding valve for high temperature environment according to claim 2, characterized in that: The material holding rotor (220) further comprises two spline connection plates (226), wherein the spline connection plates (226) are arranged on the outer side of the rotor end plate (223), and boss splines matching with spline grooves of the spline connection plates (226) are arranged at relative positions of the rotor shaft (210); And / or, a rotor retaining ring (227) is respectively provided on both sides of the material containing rotor (220) of the rotor shaft (210) for limiting the movement of the material containing rotor (220) on the rotor shaft (210).

5. The feeding valve for high temperature environment according to claim 1, characterized in that: The rotary joint (320) and the rotor shaft (210) are connected in a flexible insertion manner.

6. The feeding valve for high temperature environment according to claim 1, characterized in that: The rotor shaft (210) is made of 42CrMo steel rod; And / or, the material holding rotor (220) adopts ZG 40 Cr 25 Ni 20 Made of Si2 material; And / or, the surface of the material holding rotor (220) is clad with a tungsten carbide wear-resistant cladding layer; And / or, the housing (110) is made of Q345R steel plate; and / or, the inner surface of the shell (110) is built-up with a tungsten carbide wear-resistant build-up layer; And / or, the housing assembly is a central axis symmetrical structure.

7. The feeding valve for high temperature environment according to any one of claims 1 to 6, characterized in that: The housing assembly further comprises an equipment flange (113), a flange cover (120) and a sealing plate (131); The equipment flange (113) is respectively sleeved on the openings on both sides of the connection between the housing (110) and the rotor shaft (210); the flange cover (120) is sealedly connected to the outer side of the equipment flange (113); an annular groove is provided on the outer side of the flange cover (120); the sealing plate (131) covers the annular groove of the flange cover (120) to form a sealed cavity for water injection; the sealing plate (131) is provided with a water injection port (121) and a water discharge port (122) which are connected to the sealed cavity.

8. The feeding valve for high temperature environment according to claim 7, characterized in that: The housing assembly further comprises a sealing flange (132), wherein the sealing flange (132) is arranged between the rotor shaft (210) and the equipment flange (113), the flange cover (120) and the sealing plate (131), and the sealing flange (132) is welded to the flange cover (120) and the sealing plate (131) respectively.

9. The feeding valve for high temperature environment according to claim 8, characterized in that: A reserved gap is provided between the sealing flange (132) and the rotor shaft (210), the reserved gap is filled with a packing seal (214), and a sealing gland (212) is also sleeved on the rotor shaft (210), and the sealing gland (212) is detachably mounted on the sealing flange (132).

10. The feeding valve for high temperature environment according to claim 9, characterized in that: An oil filling hole (1321) is provided on the sealing flange (132), and a sealing ring for preventing lubricating oil leakage is also provided between the sealing gland (212) and the rotor shaft (210).

11. The feeding valve for high temperature environment according to claim 8, characterized in that: The housing assembly also includes a bearing seat (140) for supporting the rotor shaft (210); the bearing seat (140) is disposed on the outside of the sealing flange (132) and is fixed to the flange cover (120) via a rib plate.

12. The feeding valve for high temperature environment according to claim 1, characterized in that: The feed inlet (111) of the housing component is eccentrically arranged.

13. The feeding valve for high temperature environment according to claim 12, characterized in that: An inspection hole (162) is provided on the tube wall of the feed port (111).

14. The feeding valve for high temperature environment according to claim 1, characterized in that: The discharge port (112) is formed with a tapered discharge pipe (150).

15. The feeding valve for high temperature environment according to claim 1, characterized in that: Two material baffle plates (170) are arranged between the inner wall of the housing (110) and the material containing rotor (220), and the material baffle plates (170) are used to prevent materials from entering between the rotor shaft (210) and the flange cover (120).

16. The feeding valve for high temperature environment according to claim 1, characterized in that: A water jacket outer shell (330) is provided on the outer side of the shell (110), and a cooling water inlet (333) and a cooling water outlet (334) are provided on the water jacket outer shell (330). A cooling cavity is formed between the water jacket outer shell (330) and the shell (110), and a water jacket partition (335) is provided in the cooling cavity between the cooling water inlet (333) and the cooling water outlet (334).

17. The feeding valve for high temperature environment according to claim 16, characterized in that: A plurality of guide plates (332) are arranged in an alternating manner in the cooling cavity.

18. The feeding valve for high temperature environment according to claim 16, characterized in that: The bottom of the water jacket housing (330) is provided with a liquid discharge port (331), and a discharge valve is provided on the liquid discharge port (331).

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