CN116426706A

CN116426706A - Thermal-insulated wind gap cover

Info

Publication number: CN116426706A
Application number: CN202310361452.1A
Authority: CN
Inventors: 闫丽峰; 张紫豪; 刘东东; 梁锐斌; 刘尚京; 赵冬火
Original assignee: Hebei Wanfeng Metallurgical Spare Parts Co ltd
Current assignee: Hebei Wanfeng Metallurgical Spare Parts Co ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-07-14

Abstract

The invention relates to a thermal insulation tuyere small sleeve, which comprises the following components: a jacket body including a cooling water inlet and a cooling water outlet; an inner sleeve interfacing with a first portion of the sleeve body; the outer sleeve is arranged outside the inner sleeve and is in butt joint with the second part of the sleeve main body, a cavity is formed between the outer sleeve and the inner sleeve, and the cavity is communicated with the cooling water inlet and the cooling water outlet; and a deflector disposed in the cavity and configured to guide the cooling water to flow in the cavity; wherein the surface of one side of the inner sleeve far away from the outer sleeve comprises one or more heat insulation layers; wherein the inner sleeve is connected with the outer sleeve at the front end through a first transition section; the inner sleeve is connected with the sleeve main body at the rear end through a second transition section. This application wind gap cover is through the structural design again for the cooling water cavity of cover keeps apart with the wind hole that hot-blast passed through, thereby can reduce the influence of cooling water to hot-blast temperature, can reduce the loss of hot-blast temperature, is favorable to improving economic benefits.

Description

Thermal-insulated wind gap cover

Technical Field

The invention relates to the technical field of blast furnaces, in particular to a heat-insulating tuyere small sleeve.

Background

Blast furnace smelting is a process for continuously producing liquid products (e.g., pig iron) in a blast furnace using coke, raw materials (e.g., iron ore) and solvents (limestone, dolomite). In the production of a blast furnace, coke, raw materials and solvent are filled into the blast furnace from an inlet at the top of the blast furnace, preheated air is blown in from a tuyere at the lower part of the furnace along the periphery of the furnace or auxiliary fuel (coal dust, heavy oil and natural gas) is blown in, carbon in the coke or the auxiliary fuel can be combusted with oxygen in the blown air at high temperature to generate carbon monoxide and hydrogen, and oxygen in the raw materials can be removed in the ascending process of the blast furnace, so that a liquid product can be obtained.

The blast furnace tuyere small sleeve is an important part for conveying hot air or spraying auxiliary fuel into the furnace in the production of the blast furnace, and is also the part which is most easily damaged. The front end of the tuyere small sleeve needs to extend into the furnace, is easily melted and damaged by high temperature (2000-2400 ℃) in the furnace, and is also easily worn by drop penetration of metal liquid drops and circulation of coke, so that the working environment of the blast furnace tuyere small sleeve is very bad, and the tuyere small sleeve needs to be cooled and radiated continuously. However, when the tuyere small sleeve is used for conveying hot air for the blast furnace, the hot air input into the blast furnace passes through the tuyere small sleeve, and the temperature of the hot air passing through the tuyere small sleeve is reduced due to the excellent heat conduction effect of the tuyere small sleeve, so that the economic index of the operation of the blast furnace is influenced, and the conventional heat-insulation tuyere small sleeve is difficult to manufacture.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a heat-insulating tuyere small sleeve, which comprises the following components: a jacket body including a cooling water inlet and a cooling water outlet; an inner sleeve interfacing with a first portion of the sleeve body; an outer sleeve disposed outside the inner sleeve and interfacing with the second portion of the sleeve body, wherein a cavity is formed between the outer sleeve and the inner sleeve, the cavity being in communication with the cooling water inlet and the cooling water outlet; and a deflector disposed in the cavity and configured to guide cooling water to flow in the cavity; wherein the surface of one side of the inner sleeve far away from the outer sleeve comprises one or more heat insulation layers; wherein the inner sleeve is connected with the outer sleeve at the front end through a first transition section; the inner sleeve is connected with the sleeve main body at the rear end through a second transition section.

A thermally insulated tuyere small sleeve as above, said inner sleeve comprising one or more grooves on a side surface thereof remote from said outer sleeve, configured to receive and protect said thermal insulation layer.

The insulating tuyere small sleeve as described above, wherein the first transition section is a first transition piece independent from the inner sleeve and the outer sleeve.

The insulating tuyere small sleeve as described above, wherein the second transition section is a second transition piece independent from the inner sleeve and the outer sleeve.

The insulating tuyere small sleeve as above, wherein said first transition section is a part of said outer sleeve.

The insulating tuyere small sleeve as described above, wherein said second transition section is a part of said sleeve body.

The heat-insulating tuyere small sleeve is characterized in that the first transition section is provided with a first notch for accommodating the front end of the inner sleeve; the second transition section has a second indentation that receives the rear end of the inner sleeve.

The heat-insulating tuyere small sleeve is characterized in that the combination width between the front end of the inner sleeve and the first notch is 5-30 mm; the combination width between the rear end of the inner sleeve and the second notch is 5-30mm.

The heat-insulating tuyere small sleeve is characterized in that the inner sleeve is made of steel or alloy steel; the material of the outer sleeve and/or the sleeve main body is copper or alloy copper.

The thermal insulation tuyere small sleeve, wherein one side of the inner sleeve, which is close to the thermal insulation layer, comprises an adhesion layer which is configured to increase the adhesion force of the thermal insulation layer.

This application wind gap cover is through the structural design again for the cooling water cavity of cover keeps apart with the wind hole that hot-blast passed through, thereby can reduce the influence of cooling water to hot-blast temperature, can reduce the loss of hot-blast temperature, is favorable to improving economic benefits.

Drawings

Preferred embodiments of the present invention will be described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is a schematic view of an insulating tuyere small sleeve according to an embodiment of the present application;

FIG. 2 is an exploded view of an insulating tuyere small sleeve according to an embodiment of the present application;

FIG. 3 is a side view of an insulating tuyere small sleeve according to an embodiment of the present application;

FIG. 4 is a cross-sectional view of an insulating tuyere small sleeve according to an embodiment of the present application;

FIG. 5 is a schematic view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 6 is an exploded view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 7 is a side view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 8 is a cross-sectional view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 9 is a schematic view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 10 is an exploded view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 11 is a side view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 12 is a cross-sectional view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 13 is a schematic view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 14 is an exploded view of an insulating tuyere small sleeve according to another embodiment of the present application;

FIG. 15 is a side view of an insulating tuyere small sleeve according to another embodiment of the present application; and

FIG. 16 is a cross-sectional view of an insulating tuyere small sleeve according to another embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the application may be practiced. In the drawings, like reference numerals describe substantially similar components throughout the different views. Various specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to practice the teachings of the present application. It is to be understood that other embodiments may be utilized or structural, logical, or electrical changes may be made to the embodiments of the present application.

The tuyere small sleeve is an important element in the operation of the blast furnace, and the hot air passing through the air hole of the tuyere small sleeve supplies heat to the blast furnace, which accounts for 20% -30% of the total heat of the blast furnace. In order to ensure the normal use of the tuyere small sleeve, the tuyere small sleeve is usually made of copper, so that the tuyere small sleeve has an excellent heat conduction effect (the heat conduction coefficient is 384W/(m.k)), and the temperature of hot air passing through the small sleeve is reduced. The research shows that the fuel ratio can be reduced by 20-30kg/t when the wind temperature of the blast furnace is increased by 100 ℃. The volume of the conventional tuyere small sleeve is 450 cubic meters, the diameter of an air inlet is phi 160, the diameter of an air outlet is phi 115, the air inlet speed is 230m/s, and the temperature of hot air is about 1100 ℃, so that the temperature of the hot air can be reduced to be close to 40 ℃ after passing through the tuyere small sleeve, more hot air needs to be supplemented for the blast furnace, so that the resource loss is caused, the economic index of the blast furnace is influenced, and various manufacturers are devoted to the research and development of the heat-insulating tuyere small sleeve at present, but the small sleeve is difficult to manufacture due to the increased structure, and the normal use of the small sleeve is seriously influenced.

The application provides a novel thermal-insulated wind gap cover is little, through set up the insulating layer between the cooling system of wind hole and wind gap cover, isolated cooling water and hot-blast to can reduce the coefficient of heat conductivity of part wind gap cover (at least hot-blast through the part) department, can avoid the cooling system of wind gap cover to produce the influence to hot-blast, reduce hot-blast temperature loss, reduce fuel consumption, reduce the wasting of resources's loss is extravagant, improves economic benefits.

The technical scheme of the application is further described through specific embodiments. It should be understood by those skilled in the art that the following descriptions are only for convenience in understanding the technical solutions of the present application and should not be used to limit the scope of protection of the present application.

FIG. 1 is a schematic view of an insulating tuyere small sleeve according to an embodiment of the present application. FIG. 2 is an exploded view of an insulating tuyere small sleeve according to an embodiment of the present application. FIG. 3 is a side view of an insulating tuyere small sleeve according to an embodiment of the present application. FIG. 4 is a cross-sectional view of an insulating tuyere small sleeve according to an embodiment of the present application.

As shown, the thermally insulated tuyere small sleeve 100 (which may be simply referred to as a "tuyere small sleeve" or "small sleeve") includes a sleeve body 110, an inner sleeve 120, an outer sleeve 130, and a deflector 140. Wherein the jacket main body 110 may include a cooling water inlet 111 and a cooling water outlet 112; the inner sleeve 120 interfaces with a first portion of the sleeve body 110; the outer jacket 130 is disposed outside the inner jacket 120 and is abutted with the second portion of the jacket main body 110, a cavity 101 is formed between the outer jacket 130 and the inner jacket 120, and the cavity 101 communicates with the cooling water inlet 111 and the cooling water outlet 112; the flow guide 140 is disposed in the cavity 101, and can guide the cooling water to flow in the cavity, so as to dissipate heat for the tuyere small sleeve.

In some embodiments, the tuyere small sleeve 100 may further include a wind hole 150, which is provided in the tuyere small sleeve, and may be used to supply hot wind to the blast furnace or to inject auxiliary fuel. In some embodiments, the wind hole 150 extends through the entire tuyere small sleeve therein, the outer sleeve defining a front end portion 151 of the wind hole; the inner sleeve defines a middle portion 152 of the wind hole; the sleeve body defines a rear end portion 153 of the wind hole. In some embodiments, the front end portion of the wind hole 150 may include a wear layer (not shown) that may effectively prevent the flushing of the wind hole into the auxiliary fuel and may resist high temperature erosion in the blast furnace. In some embodiments, the wind hole middle portion may also include a wear layer proximate the front end portion. In some embodiments, the wear layer may be formed by build-up welding. In some embodiments, the wear layer may be 2-5mm thick. For example: 3mm.

In some embodiments, the sleeve body 110 is generally circular in shape, wherein a first portion of the sleeve body 110 is proximal to a middle portion of the sleeve body and a second portion of the sleeve body is distal from the middle portion of the sleeve body compared to the first portion. In some embodiments. The sleeve body 110 may further include a water inlet chamber and a water outlet chamber, wherein the water inlet chamber communicates with the cooling water inlet 111; the outlet chamber communicates with the cooling water outlet 112 and may be used to buffer cooling water from the inlet and outlet jackets by providing multiple chambers in the jacket body and communicating with the cooling water inlet and outlet. In some embodiments, the water inlet chamber and the water outlet chamber completely cover the entire sleeve body 110, so that the cooling water can occupy the entire sleeve body, and the sleeve body can be heat-dissipating and protected. In some embodiments, the volume occupied by the outlet chamber may be greater than the volume occupied by the inlet chamber. In some embodiments, the material of the sleeve body may be copper, which facilitates heat transfer and heat dissipation from the tuyere small sleeve. In some embodiments, the sleeve body may be formed by casting, facilitating the formation of multiple chambers, facilitating manufacturing.

The application describes this application technical scheme with the wind gap cover of single business turn over, includes a water inlet chamber and a water outlet chamber in the cover main part, as understood by the person skilled in the art, this application also can be applied to other wind gap covers of many business turn over, like two business turn over wind gap covers, then can include a plurality of water inlet chambers and a plurality of water outlet chamber in the cover main part.

In some embodiments, the surface of the inner sleeve 120 on the side away from the outer sleeve may include one or more insulation layers 121 that may isolate the chamber 101 from the air holes 150, thereby isolating the cooling water from the hot air, reducing the effect of the cooling water on the hot air passing through the air holes, reducing the temperature loss of the hot air, reducing the heat loss of the blast furnace, reducing the fuel consumption, and improving the economic efficiency. In some embodiments, the surface of the inner sleeve 120 on the side away from the outer sleeve may include one or more grooves to accommodate the insulation layer, prevent the insulation layer from occupying the volume of the air holes, affecting the delivery of hot air, and also protect the insulation layer from abrasion damage to the insulation layer or stripping the insulation layer from the inner sleeve when the air holes are blown.

In some embodiments, the inner sleeve 120 may be coupled to the outer sleeve and/or sleeve body via a transition section (not shown). According to one embodiment of the present application, the inner sleeve 120 may include a sleeve 122 and stop

rings

123 and 124. Wherein the blocking rings 123 and 124 are respectively disposed at both ends of the sleeve 122, the sleeve 122 and the blocking rings 123 and 124 may be connected by welding, and the inner sleeve 120 is connected to the first portion of the sleeve body by the blocking ring 123. In some embodiments, the stop rings 123 and 124 may be transition sections where the inner sleeve 120 is connected to the outer sleeve and/or sleeve body.

In some embodiments, the thickness of the baffle rings 123 and 124 may be greater than the thickness of the sleeve 122, such that the sleeve 122 and the baffle rings at both ends thereof form a groove that can accommodate the insulation layer, protect the insulation layer, and prevent the insulation layer from being broken and peeled by hot air passing through the air holes. In some embodiments, the thickness of the sleeve may be 2-10mm. In some embodiments, the thickness of the stop rings 123 and 124 may be 10-50mm.

In some embodiments, the material of the inner sleeve or a portion thereof may be steel or a steel alloy. According to one embodiment of the present application, the sleeve 122 may be a stainless steel material, where the stainless steel has reduced heat conductivity relative to copper, which is also beneficial to isolate the chamber 101 from the air holes 150, to protect the air holes from the hot air input temperature, and to improve the structural strength of the tuyere small sleeve. In some embodiments, the material of the baffle rings 123 and 124 may be copper, which facilitates the connection of the inner sleeve to the sleeve body and/or outer sleeve by providing copper rings at both ends of the sleeve, which facilitates the fabrication of the tuyere small sleeve.

According to another embodiment of the present application, the material of the blocking rings 123 and 124 may be the same as the sleeve 122, and the sleeve 122 is integrally formed with the blocking rings 123 and 124 at both ends thereof. For example: the groove structure is directly formed on the surface of the stainless steel through machining, so that the heat insulation layer can be protected.

In some embodiments, the tuyere small sleeve 100 may further comprise a connection plate (not shown in the drawings) provided at a side of the blocking rings 123 and 124 remote from the sleeve 122, which may be used for connection with the sleeve body and/or the outer sleeve. In some embodiments, the material of the connection plate may be copper or copper alloy, or steel alloy.

In some embodiments, the connection plate may also be a transition section where the inner sleeve is connected to the outer sleeve and/or sleeve body. In some embodiments, the connection plate may also be part of, or pre-attached to, the outer sleeve and/or sleeve body. In some embodiments, the connection plate may include a notch to accommodate the inner sleeve so that it may be directly connected to the inner sleeve to facilitate the manufacture of the tuyere small sleeve. In some embodiments, the notch of the connection plate and the inner sleeve have a combined width of 5-30mm.

According to one embodiment of the present application, the material of the insulating layer may be a low thermal conductive material, which may effectively thermally isolate the chamber 101 from the wind hole. In some embodiments, the low thermal conductivity material has a thermal conductivity of not more than 2W/(m x k) such that the temperature difference between the inside and outside of the tuyere small sleeve is at least 300 ℃. In some embodiments, the insulating layer may be one or more of a castable, ceramic, insulating paint, or other non-metallic material.

In some embodiments, an adhesion layer (not shown) may be included on a surface of the sleeve adjacent to the insulating layer 121, which may be used to increase adhesion of the insulating layer, facilitate adhesion of the insulating layer to the inner sleeve, and facilitate reinforcement of the connection between the insulating layer and the inner sleeve, prevent the insulating layer from falling off, and affect normal use of the tuyere small sleeve. In some embodiments, the adhesive layer may include a plurality of ribs or grooves that are staggered, so that the sleeve surface may form a mesh surface, which is beneficial to increasing the adhesion of the sleeve surface. In some embodiments, the attachment layer may also include shot blasting, which may be used to roughen the sleeve surface and increase adhesion. In some embodiments, the attachment layer may also include grit blasting, with which the sleeve surface may be roughened to increase adhesion.

In some embodiments, the sleeve may further include a reflective layer (not shown) on a side surface of the sleeve adjacent to the insulating layer 121, which may be used to reflect heat, thereby isolating the chamber 101 from the air holes 150. In some embodiments, the reflective layer may be disposed between the sleeve and the insulating layer, so that heat of the cooling water may be reflected and an insulating effect of the insulating layer may be improved.

In some embodiments, the baffle ring 123 and the sleeve body 110 may be connected by welding, and a welding seam of the two may face the wind hole 150 and be located on an inner wall of the wind hole, so that a welding path may be protected from the high temperature in the furnace, thereby damaging the structure of the tuyere small sleeve.

In some embodiments, jacket 130 may include side walls 132 and front wall 133, wherein both side walls 132 and front wall 133 are integrally formed. The outer sleeve 130 is connected to the second portion of the sleeve body 110 by the free ends of the side walls 132, and the outer sleeve 130 is connected to the retainer ring 124 of the inner sleeve 120 by the free ends of the front wall 133. In some embodiments, the material of the outer sleeve may be copper, which facilitates heat transfer and heat dissipation from the tuyere small sleeve. In some embodiments, the outer sleeve can be formed by extrusion, so that the compactness of the outer sleeve can be improved, the strength of the outer sleeve is increased, and the severe environment in the furnace is better resisted.

In some embodiments, the free end of the side wall 132 and the sleeve main body 110 may be connected by welding, and a welding seam between the free end of the outer wall 123 and the sleeve main body 110 may be far away from a welding seam between the free end of the outer wall 123 and the sleeve main body, so that an influence of high temperature in the furnace on the welding seam may be effectively prevented, and damage to the welding seam caused by metal liquid drops in the furnace may be prevented, and stability of the tuyere small sleeve structure may be also prevented. In some embodiments, the free end of the front wall 133 and the inner sleeve 120 may be connected by welding, and the welding seam therebetween is located on the inner wall of the wind hole, so that the influence of the metal liquid drop dropped in the furnace on the welding seam, the influence of the coke circulation in the furnace on the welding seam, and the influence of the high temperature in the furnace on the welding seam are prevented, the welding seam is effectively protected, and the stability of the tuyere small sleeve structure is facilitated. In some embodiments, the weld between the free end of the front wall 133 and the inner sleeve 120 may be disposed in the wind hole wear layer, such that the wear layer may protect the weld from the injected auxiliary fuel.

In some embodiments, the side walls 132 of the outer sleeve are positioned outside the inner sleeve 120 and the front wall 133 of the outer sleeve surrounds the front end of the inner sleeve 120 so that the outer sleeve may protect the inner sleeve. In some embodiments, the thickness of the sidewall 132 is 10-15mm, which is effective to prevent the sides of the tuyere small sleeve from being penetrated by the metal droplets or from being damaged by the metal liquid. According to a preferred embodiment of the present application, the thickness of the sidewall 132 may be 13mm. In some embodiments, the thickness of the front wall 133 is 25-30mm, which can effectively prevent mechanical abrasion and thermal melting loss of the front end of the tuyere small sleeve, and increase the service life of the tuyere small sleeve. According to a preferred embodiment of the present application, the thickness of the front wall 133 may be 28mm.

In some embodiments, the flow director 140 includes a front bulkhead 141 located adjacent the jacket front wall 133, an intermediate bulkhead 142 between the front bulkhead and the jacket body, and a plurality of water baffles 143 between the intermediate bulkhead and the jacket side walls. In some embodiments, the material of the inner deflector may be steel, which may provide support to the tuyere small sleeve internally, which is advantageous for improving the strength of the tuyere small sleeve. In some embodiments, the inner deflector may be welded to facilitate fabrication.

In some embodiments, the cavity 101 may also include a side chamber 1011 and a front end chamber 1012, and the deflector 140 may be located in the side chamber 1011 and may direct the flow of water into the front end chamber 1012 or the cooling water exiting the front end chamber 1012.

In some embodiments, the deflector may divide the side chamber 1011 into multiple parts (the water inlet chamber 1013 and the water outlet chamber 1014), and when cooling water enters the chamber 101, it enters the water inlet chamber 1013, then enters the front end chamber 1012 from the water inlet chamber 1013, then enters the water outlet chamber 1014, and finally exits the chamber 101 from the water outlet chamber 1014.

In some embodiments, a plurality of water stop plates 143 may be provided in the water outlet chamber 1014, and a water return flow passage of the cooling water may be formed in the water outlet chamber 1014 to guide the flow of the cooling water. In some embodiments, a portion of the intermediate partition may be outwardly bent near the first portion of the sleeve body so as to be in communication with the sleeve body water inlet and/or outlet, which may allow cooling water to enter the water inlet chamber 1013 and/or exit the water outlet chamber 1014. In some embodiments, a plurality of water blocking plates 143 may be provided in the water inlet chamber 1013, and a water inlet flow path of the cooling water may be formed in the water outlet chamber 1013 to guide the cooling water to flow. In some embodiments, the plurality of water stop plates 143 are arranged more sparsely closer to the sleeve body, so that the formed flow passage cross-sectional area is larger, and the flow velocity of the flow passage water flowing from the sleeve body is faster, so that the tuyere small sleeve is beneficial to extending into the blast furnace part to dissipate heat. In some embodiments, the cross-sectional area of the front end chamber 1012 is the smallest, the flow rate of water in the front chamber is the fastest, and the heat dissipation effect is the best.

In some embodiments, the deflector 140 may further include a water baffle (not shown) disposed on the front partition 141 and extending toward the front chamber 1012, so as to block the cooling water entering the front chamber 1012, so that the cooling water flows along the whole front chamber and enters the water outlet chamber, and prevent the water from flowing back into the water outlet chamber after entering the front chamber, which results in the front chamber forming a dead water area and affecting the heat dissipation of the tuyere small sleeve.

According to the air port small sleeve, through the novel structural design, the cooling water cavity of the small sleeve is isolated from the air hole through which hot air passes, so that the influence of cooling water on the temperature of the hot air can be reduced, the temperature drop of the hot air can be reduced by at least half, that is, the same air port small sleeve has the capacity of 450 cubic meters in a blast furnace, the diameter of an air inlet is phi 160, the diameter of an air outlet is phi 115, the air inlet speed is 230m/s, and the temperature of the hot air is reduced by 20 ℃ at most after the air port small sleeve is input under the condition that the temperature of the hot air is 1100 ℃, so that the loss of the temperature of the hot air is effectively reduced, and the economic benefit is improved.

Of course, the present application may also be used with other structures of tuyere small sleeves, such as a tuyere small sleeve may further include one or more partitions (not shown in the figure), which may be disposed between the inner sleeve and the outer sleeve, may divide the chamber into multiple parts (e.g., into multiple chambers), and may satisfy continuous use of multiple cooling structures of the tuyere small sleeve.

The application also provides another structure of the heat-insulating tuyere small sleeve, which is described in detail below:

FIG. 5 is a schematic view of an insulating tuyere small sleeve according to another embodiment of the present application. Fig. 6 is an exploded view of an insulating tuyere small sleeve according to another embodiment of the present application. FIG. 7 is a side view of an insulating tuyere small sleeve according to another embodiment of the present application. FIG. 8 is a cross-sectional view of an insulating tuyere small sleeve according to another embodiment of the present application.

As shown, the thermally insulated tuyere small sleeve 500 (which may be simply referred to as a "tuyere small sleeve" or "small sleeve") includes a sleeve body 510, an inner sleeve 520, an outer sleeve 530, and a deflector 540. Wherein the sleeve body 510 may include a cooling water inlet 511 and a cooling water outlet 512; the inner sleeve 520 interfaces with a first portion of the sleeve body 510; the outer sleeve 530 is disposed at the outer side of the inner sleeve 520 and is butted with the second portion of the sleeve body 510, a cavity 501 is formed between the outer sleeve 530 and the inner sleeve 520, and the cavity 501 communicates with the cooling water inlet 511 and the cooling water outlet 512; the deflector 540 is disposed in the cavity 501, and can guide the cooling water to flow in the cavity, so as to dissipate heat for the tuyere small sleeve. According to an embodiment of the present application, the structure of the thermal insulation tuyere small sleeve 500 is similar to the embodiment of fig. 1, except that the connection between the inner sleeve and the sleeve main body and/or the outer sleeve affects the manufacture of the tuyere small sleeve, and the following will focus on the same or similar structure as the embodiment of fig. 1, and will not be repeated.

In some embodiments, the inner sleeve 520 may be coupled to the outer sleeve and/or sleeve body via a transition section (not shown). According to one embodiment of the present application, inner sleeve 520 may include sleeve 522 and retaining ring 523. Wherein, the baffle ring 523 is disposed at one end of the sleeve 522 near the outer sleeve, the sleeve 522 and the baffle ring 523 can be connected by welding, and the inner sleeve 520 is connected to the outer sleeve by the baffle ring 523. In some embodiments, the baffle 523 may be a transition section where the inner sleeve 520 is connected to the outer sleeve.

In some embodiments, the thickness of the baffle ring 523 may be greater than the thickness of the sleeve 522, which may protect the insulation layer 521 disposed on the inner jacket from being broken and peeled by hot air passing through the air holes. In some embodiments, the sleeve 522 may be directly connected to the first portion of the sleeve body, where the first portion of the sleeve body has a width greater than the width of the sleeve 522, and the difference in width between the two may be effective to protect the insulation. In some embodiments, the thickness of sleeve 522 may be 2-10mm. In some embodiments, the thickness of the baffle ring 523 may be 10-50mm.

In some embodiments, the material of the inner sleeve or a portion thereof may be steel or a steel alloy. According to one embodiment of the present application, sleeve 522 may be a stainless steel material, which may have reduced thermal conductivity relative to copper, may also be useful for insulating chamber 501 from air holes 550, may be useful for protecting the air holes from the temperature of the incoming hot air, and may also improve the structural strength of the tuyere small sleeve. In some embodiments, the material of the baffle ring 523 may be copper, which facilitates the connection of the inner sleeve to the sleeve body and/or outer sleeve by providing the sleeve with a copper ring, which facilitates the fabrication of the tuyere small sleeve. For example: when the tuyere small sleeve is manufactured, the inner sleeve can be connected to the first part of the sleeve main body, when the assembly parts are small, the stainless steel sleeve of the inner sleeve is connected with the sleeve main body in advance, the connection strength and stability of the stainless steel sleeve and the sleeve main body can be effectively ensured, and then the connected inner sleeve and the sleeve main body are connected with the outer sleeve, so that the tuyere small sleeve is manufactured.

According to another embodiment of the present application, the material of the baffle ring 523 may be the same as the sleeve 522, and the sleeve 522 is integrally formed with the baffle ring 523. For example: the heat insulation layer can be formed by machining directly on the surface of stainless steel, and can be protected.

In some embodiments, the tuyere small sleeve 500 may further comprise a connection plate (not shown) provided at a side of the blocking ring 523 remote from the sleeve and a side of the sleeve where the blocking ring is not provided, which may be used for connection of the inner sleeve with the sleeve body and/or the outer sleeve. In some embodiments, the material of the connection plate may be copper or copper alloy, or steel alloy.

The application also provides a structure of another heat-insulating tuyere small sleeve, which is specifically as follows:

FIG. 9 is a schematic view of an insulating tuyere small sleeve according to another embodiment of the present application. Fig. 10 is an exploded view of an insulating tuyere small sleeve according to another embodiment of the present application. FIG. 11 is a side view of an insulating tuyere small sleeve according to another embodiment of the present application. FIG. 12 is a cross-sectional view of an insulating tuyere small sleeve according to another embodiment of the present application.

As shown, the thermally insulated tuyere small sleeve 900 (which may be simply referred to as a "tuyere small sleeve" or "small sleeve") includes a sleeve main body 910, an inner sleeve 920, an outer sleeve 930, and a deflector 940. Wherein the sleeve body 910 may include a cooling water inlet 911 and a cooling water outlet 912; the inner sleeve 920 interfaces with a first portion of the sleeve body 910; the outer sleeve 930 is disposed outside the inner sleeve 920 and is abutted with the second portion of the sleeve body 910, a cavity 901 is formed between the outer sleeve 930 and the inner sleeve 920, and the cavity 901 is communicated with the cooling water inlet 911 and the cooling water outlet 912; the flow director 940 is disposed in the cavity 901, and may guide the cooling water to flow in the cavity, so as to dissipate heat for the tuyere small sleeve. According to an embodiment of the present application, the structure of the thermal insulation tuyere small sleeve 900 is similar to the embodiment of fig. 1, except that the connection between the inner sleeve and the sleeve main body and/or the outer sleeve is only different, and the manufacturing of the thermal insulation tuyere small sleeve will be emphasized below, and the structure identical or similar to the embodiment of fig. 1 will not be repeated.

In some embodiments, the inner sleeve 920 may be coupled to the outer sleeve and/or sleeve body via a transition section (not shown). According to one embodiment of the present application, the inner sleeve 920 may include a sleeve 922 and a catch ring 923. Wherein, the baffle ring 923 is disposed at one end of the sleeve 922 near the sleeve body, the sleeve 922 and the baffle ring 923 may be connected by welding, and the inner sleeve 920 is connected to the first portion of the sleeve body by the baffle ring 923. In some embodiments, the catch ring 923 may be a transition section where the inner sleeve 920 is connected to the sleeve body.

In some embodiments, the thickness of the baffle ring 923 may be greater than the thickness of the sleeve 922, which may protect the insulation 921 disposed on the inner sleeve from damage and peeling by hot air through the air holes. In some embodiments, sleeve 922 may be directly coupled to an outer jacket, where the outer jacket has a width greater than the width of sleeve 922, and the difference in width between the two may be effective to protect the insulation. In some embodiments, the thickness of sleeve 922 may be 2-10mm. In some embodiments, the thickness of the catch ring 923 may be 10-50mm.

In some embodiments, the material of the inner sleeve or a portion thereof may be steel or a steel alloy. According to one embodiment of the present application, sleeve 922 may be a stainless steel material, which may have reduced thermal conductivity relative to copper, and may also help isolate chamber 901 from air holes 950, to help protect the temperature of the air holes entering the hot air, and may also improve the structural strength of the tuyere small sleeve. In some embodiments, the material of the baffle ring 923 may be copper, which facilitates connection of the inner sleeve to the sleeve body and/or outer sleeve by providing the sleeve with a copper ring, which facilitates fabrication of the tuyere small sleeve. For example: when the tuyere small sleeve is manufactured, the outer sleeve and the inner sleeve can be connected in advance, when the assembly parts are small, the stainless steel sleeve of the inner sleeve is connected with the outer sleeve in advance, the connection strength and stability of the stainless steel sleeve and the outer sleeve can be effectively guaranteed, and then the connected inner sleeve and the outer sleeve are connected with the sleeve main body, so that the tuyere small sleeve is manufactured.

According to another embodiment of the present application, the material of the baffle ring 923 may be the same as the sleeve 922, and the sleeve 922 and the baffle ring 923 are integrally formed. For example: the heat insulation layer can be formed by machining directly on the surface of stainless steel, and can be protected.

In some embodiments, the tuyere small sleeve 900 may further include a connection plate (not shown) disposed at a side of the baffle ring 923 remote from the sleeve and a side of the sleeve where the baffle ring is not disposed, which may be used for connection of the inner sleeve with the sleeve body and/or the outer sleeve. In some embodiments, the material of the connection plate may be copper or copper alloy, or steel alloy.

FIG. 13 is a schematic view of an insulating tuyere small sleeve according to another embodiment of the present application. Fig. 14 is an exploded view of an insulating tuyere small sleeve according to another embodiment of the present application. FIG. 15 is a side view of an insulating tuyere small sleeve according to another embodiment of the present application. FIG. 16 is a cross-sectional view of an insulating tuyere small sleeve according to another embodiment of the present application.

As shown, the thermally insulated tuyere small sleeve 1300 (which may be referred to simply as a "tuyere small sleeve" or "small sleeve") includes a sleeve body 1310, an inner sleeve 1320, an outer sleeve 1330, and a deflector 1340. Wherein the sleeve body 1310 may include a cooling water inlet 1311 and a cooling water outlet 1312; the inner sleeve 1320 interfaces with a first portion of the sleeve body 1310; the outer jacket 1330 is disposed outside the inner jacket 1320 and is butted with the second portion of the jacket body 1310, a cavity 1301 is formed between the outer jacket 1330 and the inner jacket 1320, and the cavity 1301 communicates with the cooling water inlet 1311 and the cooling water outlet 1312; the deflector 1340 is disposed in the cavity 1301 and can guide the cooling water to flow in the cavity, and can dissipate heat for the tuyere small sleeve. According to one embodiment of the present application, the structure of the thermal insulation tuyere small sleeve 1300 is similar to the embodiment of fig. 1, except that the connection between the inner sleeve and the sleeve main body and/or the outer sleeve is only different, and the manufacturing of the thermal insulation tuyere small sleeve will be emphasized below, and the structure identical or similar to the embodiment of fig. 1 will not be repeated.

According to one embodiment of the present application, the inner sleeve 1320 may include a sleeve 1322. Wherein the sleeve may be connected at both ends to the first portion of the sleeve body and the outer jacket. In some embodiments, the sleeve 1322 is wider than the sleeve 1322 at the junction of the sleeve body and the outer sleeve, and the difference in width between the sleeve 1322 and the outer sleeve can effectively protect the insulating layer 1321 from being broken and peeled by hot air passing through the air hole. In some embodiments, the thickness of sleeve 1322 may be 2-10mm.

In some embodiments, the material of the inner sleeve or a portion thereof may be steel or a steel alloy. According to one embodiment of the present application, the sleeve 1322 may be made of stainless steel, where the stainless steel has reduced heat conductivity compared to copper, which is also beneficial to isolate the chamber 1301 from the air hole 1350, to protect the temperature of the air hole for inputting hot air, and to improve the structural strength of the tuyere small sleeve.

In some embodiments, sleeve 1322 may be coupled to the outer sheath and/or sheath body via a transition segment (not shown). In some embodiments, the tuyere small sleeve 1300 may further include connection plates (not shown) which may be provided at both sides of the sleeve and may be used for connecting the inner sleeve with the sleeve body and/or the outer sleeve. In some embodiments, the material of the connection plate may be copper or copper alloy, or steel alloy.

In some embodiments, the connection plate may be a transition section where the inner sleeve is connected to the outer sleeve and/or sleeve body. In some embodiments, the connection plate may also be part of, or pre-attached to, the outer sleeve and/or sleeve body. In some embodiments, the connection plate may include a notch to accommodate the inner sleeve so that it may be directly connected to the inner sleeve to facilitate the manufacture of the tuyere small sleeve. In some embodiments, the notch of the connection plate and the inner sleeve have a combined width of 5-30mm.

The above embodiments are provided for illustrating the present invention and not for limiting the present invention, and various changes and modifications may be made by one skilled in the relevant art without departing from the scope of the present invention, therefore, all equivalent technical solutions shall fall within the scope of the present disclosure.

Claims

1. A thermally insulated tuyere small sleeve comprising:

a jacket body including a cooling water inlet and a cooling water outlet;

an inner sleeve interfacing with a first portion of the sleeve body;

an outer sleeve disposed outside the inner sleeve and interfacing with the second portion of the sleeve body, wherein a cavity is formed between the outer sleeve and the inner sleeve, the cavity being in communication with the cooling water inlet and the cooling water outlet; and

a deflector disposed in the cavity and configured to direct cooling water to flow in the cavity;

wherein the surface of one side of the inner sleeve far away from the outer sleeve comprises one or more heat insulation layers; wherein the inner sleeve is connected with the outer sleeve at the front end through a first transition section; the inner sleeve is connected with the sleeve main body at the rear end through a second transition section.

2. The insulating tuyere small sleeve of claim 1, the inner sleeve side surface remote from the outer sleeve comprising one or more grooves configured to receive and protect the insulating layer.

3. The insulating tuyere small sleeve of claim 1, the first transition section being a first transition piece independent of the inner sleeve and the outer sleeve.

4. A thermally insulated tuyere small sleeve according to claim 1 or 3, the second transition section being a second transition piece independent from the inner sleeve and the outer sleeve.

5. The insulating tuyere small sleeve of claim 1, the first transition section being a portion of the outer sleeve.

6. The insulating tuyere small sleeve of claim 1 or 5, the second transition section being a part of the sleeve body.

7. The thermally insulated tuyere small sleeve of claim 1, the first transition section having a first notch to accommodate the front end of the inner sleeve; the second transition section has a second indentation that receives the rear end of the inner sleeve.

8. The thermally insulated tuyere small sleeve of claim 7, wherein a bonding width between the front end of the inner sleeve and the first notch is 5-30 mm; the combination width between the rear end of the inner sleeve and the second notch is 5-30mm.

9. The insulating tuyere small sleeve of claim 1, wherein the inner sleeve material is steel or alloy steel; the material of the outer sleeve and/or the sleeve main body is copper or alloy copper.

10. The insulating tuyere small sleeve of claim 1, the inner sleeve comprising an adhesion layer on a side proximate to the insulating layer configured to increase an adhesion of the insulating layer.