Blast furnace distributor arm bracket, blast furnace distributor assembly and blast furnace distributor

Abstract

The present invention provides a blast furnace distributor arm bracket, which includes a straight arm and a long rectangular bracket, wherein two straight arms are provided, and the two straight arms are spaced apart from each other; the long rectangular bracket is locked and connected to the straight arm through a wedge locking device, and is located between the two straight arms; wherein the long rectangular bracket is provided with an installation notch for installing a distribution chute, and the installation notch is formed by a depression on the top surface of the long rectangular bracket. At the same time, the present invention also provides a blast furnace distributor, which includes a blast furnace distributor assembly, and the blast furnace distributor assembly includes the blast furnace distributor arm bracket. Compared with the prior art, the blast furnace distributor arm bracket, the blast furnace distributor assembly and the blast furnace distributor arm bracket provided by the present invention are not easy to deform, thereby effectively ensuring the normal distribution of the distribution chute and ensuring the stable operation of the blast furnace.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace charge distribution, and in particular to a movable arm bracket of a blast furnace charge distribution device and a blast furnace charge distribution device. Background Art

[0002] The blast furnace is the main equipment for steel smelting. During blast furnace production, iron ore, coke, and slag-making flux (limestone) are loaded from the top of the furnace, and preheated air is blown in from the tuyere located at the bottom of the furnace along the furnace periphery. At high temperatures, the carbon in the coke (some blast furnaces also spray auxiliary fuels such as pulverized coal, heavy oil, and natural gas) burns with the oxygen in the blown air to generate carbon monoxide and hydrogen, which remove oxygen from the iron ore during the rising process in the furnace, thereby reducing iron.

[0003] The blast furnace distributor is the main distribution equipment on the blast furnace. The blast furnace distributor is installed on the top of the blast furnace and is the core equipment for blast furnace smelting. In the blast furnace distributor, the distribution chute is installed on the boom bracket to distribute the material into the furnace at different precise angles. During production and use, the repeated stability and consistency of the angle are required to be high, and the general angle change cannot be greater than 2 degrees. The deformation of each component on the boom bracket will change the angle. Therefore, the deformation that affects the angle change is very demanding. The operating temperature of the boom bracket is generally 400∽600℃. The deformation of the existing boom bracket can basically be kept within the required range, but above 600℃, or even as high as 800∽1000℃ or higher, the boom bracket is prone to deformation.

[0004] like Figures 1 to 4 As shown, in the prior art, the distribution chute 1 is installed on the boom bracket 2, and the distribution chute 1 is supported by the bracket 3 on the boom bracket 2. The boom bracket 2 is subjected to the gravity of several tons of the distribution chute 1 installed thereon, and the impact of the raw materials on the distribution chute 1 when the distribution chute 1 receives the material is transmitted to the boom bracket 2, causing the boom bracket 2 to gradually lengthen at high temperature. In addition, at high temperature, the bracket 3 on the boom bracket 2 bends downward, and the boom bracket 2 as a whole lengthens downward. The above two factors cause the distribution chute 1 to move downward, changing the distribution angle of the distribution chute 1. The deformation of the boom bracket 2 causes the angle of the distribution chute 1 to decrease by more than 2 degrees, or even up to 10 degrees. Not only does the repeated stability of the angle exceed the range, but it also exceeds the angle adjustment range used by the distribution chute 1, which seriously affects the smooth operation of the blast furnace and even makes it impossible to produce and is forced to shut down and replace the distributor. Summary of the invention

[0005] Aiming at the technical problem that the arm bracket of the blast furnace distributor in the prior art is easily deformed under high temperature, resulting in the failure of the distribution chute to distribute materials normally, thus affecting the operation of the blast furnace, the present invention provides a blast furnace distributor arm bracket which is not easily deformed, thereby effectively ensuring the normal distribution of the distribution chute and the stable operation of the blast furnace.

[0006] A blast furnace distributor arm bracket, comprising:

[0007] There are two straight booms, and the two straight booms are spaced apart from each other;

[0008] A long rectangular bracket is locked and connected to the straight booms through a wedge locking device and is located between the two straight booms;

[0009] Wherein, an installation notch for installing the material distribution chute is provided on the long rectangular bracket, and the installation notch is formed by being recessed from the top surface of the long rectangular bracket.

[0010] Preferably, the wedge locking device is an upper inclined wedge structure or a bottom flat wedge structure.

[0011] Preferably, the installation notch is an open trapezoidal structure.

[0012] Preferably, the installation notch is an arc-shaped structure.

[0013] Preferably, it also includes:

[0014] The burn-proof armor is installed on the straight boom and is located below the long rectangular bracket.

[0015] Preferably, the anti-burn armor includes two armor units, and the two armor units are respectively installed on the two straight movable arms. The armor unit includes a fixed end installed on the straight movable arm by screws and a movable end facing the other armor unit.

[0016] A blast furnace distributor assembly, comprising:

[0017] A blast furnace distributor boom bracket as described in any one of the above;

[0018] A material distribution chute is installed at the installation notch.

[0019] Preferably, the material distribution chute is provided with two fulcrums on the installation notch, and the two fulcrums are located on both sides of the installation notch close to the two straight movable arms.

[0020] A blast furnace distributor comprises the blast furnace distributor assembly as described in any one of the above.

[0021] Compared with the prior art, the arm bracket of the blast furnace distributor provided by the present invention includes a straight arm and a long rectangular bracket, wherein two straight arms are provided, and the two straight arms are arranged at intervals from each other; the long rectangular bracket is locked and connected with the straight arm through a wedge locking device, and is located between the two straight arms; wherein, the long rectangular bracket is provided with an installation notch for installing a distribution chute, and the installation notch is formed by a depression from the top surface of the long rectangular bracket. Thus, the arm bracket of the blast furnace distributor is not easily deformed by heat during the use of distribution, which effectively ensures the normal distribution of the distribution chute and the stable operation of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of a material distribution chute and a boom bracket in the prior art;

[0024] Figure 2 It is a structural schematic diagram of a material distribution chute and a boom bracket at an angle in the prior art;

[0025] Figure 3 It is a structural schematic diagram of a material distribution chute and a boom bracket in the prior art at another angle;

[0026] Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure of BB shown;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of a material distribution chute and a boom bracket provided in an embodiment;

[0028] Figure 6 for Figure 5 A schematic structural diagram of a material distribution chute and a boom bracket at one angle is shown;

[0029] Figure 7 for Figure 5 A schematic diagram of the structure of the material distribution chute and the boom bracket at another angle;

[0030] Figure 8 For along Figure 7 A schematic cross-sectional structure diagram of CC shown;

[0031] Fig. 9 for Figure 5The structural schematic diagram of the boom bracket shown;

[0032] Fig.10 for Fig. 9 A structural schematic diagram of the boom bracket at another angle;

[0033] Fig.11 For along Fig.10 A schematic cross-sectional structure diagram of an embodiment of DD is shown;

[0034] Fig.12 For along Fig.10 A schematic cross-sectional structure diagram of another embodiment of DD is shown;

[0035] Fig.13 A schematic diagram of the structure of a boom bracket provided in an embodiment

[0036] Fig.14 for Figure 5 A structural schematic diagram of a preferred embodiment of the boom bracket shown;

[0037] Fig.15 for Figure 5 The force analysis diagram of the material distribution chute and the boom bracket is shown. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0041] The present invention provides a blast furnace distributor arm bracket, which includes a straight arm and a long rectangular bracket, wherein two straight arms are provided, and the two straight arms are arranged at intervals from each other; the long rectangular bracket is locked and connected to the straight arm through a wedge locking device, and is located between the two straight arms; wherein the long rectangular bracket is provided with an installation notch for installing a distribution chute, and the installation notch is formed by a depression on the top surface of the long rectangular bracket. The blast furnace distributor arm bracket is not easy to deform, thereby effectively ensuring the normal distribution of the distribution chute and ensuring the stable operation of the blast furnace.

[0042] The blast furnace distributor arm bracket is a connecting part on the blast furnace distributor for installing the distribution chute. The blast furnace distributor arm bracket is mainly used to solve the technical problem that the arm bracket in the prior art is easily deformed under high temperature, affecting the normal distribution of the distribution chute.

[0043] In order to solve the deformation problem of the boom bracket in the prior art, some blast furnace distributors adopt the method of not having a boom bracket. By directly moving the boom function to the distribution chute, the boom is replaced when the distribution chute is replaced, which is equivalent to the regular replacement of the boom, and the cumulative deformation will not affect the production. However, the replacement of the distribution chute with the driving arm is difficult and expensive. When installing the distribution chute, the holes and pins must be aligned in a complex environment. When removing the distribution chute, if the boom on the distribution chute is deformed and stuck, people have to enter the furnace to cut the boom, which is dangerous and time-consuming. It has great limitations and there are great problems in the market application process.

[0044] Please refer to Figures 5 to 9 . This embodiment provides a blast furnace distributor arm bracket 100, specifically a hook-type boom bracket, and the blast furnace distributor arm bracket 100 includes a straight boom 10 and a long rectangular bracket 20. At the same time, this embodiment also provides a blast furnace distributor assembly 1000, which includes the blast furnace distributor arm bracket 100 and a distribution chute 200 installed on the blast furnace distributor arm bracket 100. The blast furnace distributor arm bracket 100 is used to install the distribution chute 200, and the hook on the distribution chute 200 is hung on the crossbeam (the long rectangular bracket 20) of the blast furnace distributor arm bracket 100. The pressure block above the blast furnace distributor arm bracket 100 presses the upper edge of the distribution chute 200 to form a lever, and the center of gravity is in the reverse position, completing the installation of the distribution chute 200 on the blast furnace distributor arm bracket 100.

[0045] There are two straight booms 10, and the two straight booms 10 are spaced apart from each other. The straight boom 10 means that the boom 10 is a straight-line structure as a whole, and there is no arc-shaped structure at the lower end. It can be understood that Figure 1As shown, the lower end of the movable arm 4 in the movable arm bracket 2 in the prior art is an arc segment structure 5 close to the material distribution chute 1, which causes the arc segment structure 5 at the lower end of the movable arm 4 to be easily straightened and elongated when used in a high temperature environment, and is very easy to deform. In this embodiment, the movable arm 10 is set as a straight movable arm 10, and the arc segment structure in the prior art is cancelled, which better avoids the deformation of the movable arm 10.

[0046] The long rectangular bracket 20 is installed on the straight boom 10, and the long rectangular bracket 20 is located between the two straight booms 10. The long rectangular bracket 20 means that the bracket 20 is a rectangular parallelepiped structure as a whole, and compared with the bracket 3 in the prior art, the length in the height direction can be longer, so that the material distribution chute 200 can be located in a higher area.

[0047] The rectangular bracket 20 is provided with an installation notch 21 for installing the distribution chute 200, and the installation notch 21 is formed by being recessed from the top surface of the rectangular bracket 20. In the blast furnace distributor arm bracket 100 provided in this embodiment, the distribution chute 200 is supported by the rectangular bracket 20, so that the force point supporting the distribution chute 200 can be moved upward, and the variable length basic size is shortened. At the same time, the relatively high temperature area at the lower part of the blast furnace distributor arm bracket 100 is avoided, and the influence of the easily lengthened part of the lower part of the original arm is completely eliminated. The lengthening effect of the side arm only leaves the relatively low temperature part of the upper interval. When the length is short and the temperature is relatively low, the lengthening effect of the arm can be reduced to the permissible range. And installing the distribution chute 200 through the installation notch 21 can also better balance the force between the rectangular bracket 20 and the distribution chute 200, and better avoid the occurrence of deformation.

[0048] It is understandable that the main factors that make the boom bracket easy to lengthen in the prior art are that the arc segment is easy to lengthen under high-temperature stress conditions, and the temperature of the lower part of the boom is high, and it is easy to lengthen under strong and impact loads. The downward pulling force on the bracket of the blast furnace distributor boom bracket 100 provided in this embodiment is transmitted to the upper force through friction, which shortens the length of the boom under stress. The upper part is a relatively low temperature area and is also a difficult lengthening area. The force point where the boom is pulled downward is moved upward, the length of the force is shortened, and the lower part of the boom that is easy to lengthen is reduced or basically free of force, which better avoids the lengthening of the blast furnace distributor boom bracket 100.

[0049] Please refer to Fig.10. Preferably, the long rectangular bracket 20 is locked and connected to the straight boom 10 through a wedge locking device 30. Specifically, the long rectangular bracket 20 is interference locked and connected to the straight boom 10 through a wedge locking device 30. It can be understood that the bracket 3 and the boom 4 in the prior art are assembled using forgings, and the screws and welds of the assembly are easily damaged and failed due to thermal stress at high temperatures. In this embodiment, the wedge locking device 30 is used to lock the long rectangular bracket 20 and the straight boom 10, eliminating the bolt and weld connection of the main force-bearing parts, which is safe and reliable. In addition, the locking connection method using the wedge locking device 30 is also convenient for the processing and manufacturing of various components.

[0050] Please refer to Fig.11 and Fig.12 Preferably, the wedge locking device 30 is an upper inclined wedge structure or a bottom flat wedge structure.

[0051] Preferably, in one embodiment, the long rectangular bracket 20 and the straight boom 10 are cast into an integral structure.

[0052] Please continue reading Fig. 9 Preferably, the mounting notch 21 is an open trapezoidal structure. That is, the cross section of the mounting notch 21 is an outwardly expanding trapezoidal structure, so as to better support the material distribution chute 200. Specifically, the mounting notch 21 includes a bottom surface 211 and side surfaces 212 that are bent and extended outward from both ends of the bottom surface 211, and the material distribution chute 200 abuts against the side surfaces 212.

[0053] Please refer to Fig.13 Preferably, the installation notch 21 is an arc-shaped structure.

[0054] Please refer to Fig.14 Preferably, the blast furnace distributor boom bracket 100 further includes an anti-burning armor 40, which is installed on the straight boom 10 and is located below the long rectangular bracket 20. Thus, the anti-burning armor 40 can better prevent the long rectangular bracket 20 from burning, and further prevent the blast furnace distributor boom bracket 100 from deformation.

[0055] Preferably, the anti-burn armor 40 includes two armor units 41, and the two armor units 41 are respectively installed on the two straight booms 10, that is, each straight boom 10 is correspondingly installed with one armor unit 41. The armor unit 41 includes a fixed end 411 installed on the straight boom 10 by screws and a movable end 412 facing the other armor unit 41. It can be understood that in the prior art, anti-burn armor is provided on some boom brackets, but the anti-burn armor and the boom in the prior art are an integrated structure, and the armor material is consistent with the boom material, which limits the choice of armor material, and the anti-burn armor cannot be replaced separately, resulting in the need to replace the anti-burn armor together with the boom after it is burned. In this embodiment, the anti-burn armor 40 is an independent part that can be replaced separately, and is divided into two parts and fixed by single-sided screws. The screws are only subject to the weight of the armor body, and the other end is not restricted, thereby avoiding the situation where the two ends are fixed in the high temperature zone and the solid screws are broken due to heat changes and the self-restricted cracking.

[0056] The distribution chute 200 in the blast furnace distribution device assembly 1000 is specifically installed at the installation notch 21, so that the blast furnace distribution device arm bracket 100 can better support the distribution chute 200 to avoid excessive concentration of pressure during support.

[0057] Please refer to Fig.15 Preferably, the material distribution chute 200 is provided with two fulcrums 210 on the installation notch 21, and the two fulcrums 210 are located on both sides of the installation notch 21 near the two straight booms 10. That is, the formation of the installation notch 21 is adapted to the outer surface of the material distribution chute 200, so that the fulcrum 210 supporting the material distribution chute 200 is located at the upper part of the installation notch 21. It can be understood that the fulcrum of the material distribution chute in the prior art is located at the center of the bracket, and the material distribution chute presses down the center of the bracket, so that the downward pressure F of the material distribution chute is concentrated in the middle of the bracket, and the bracket is very easy to deform downward from the middle, resulting in the clamping of the booms on both sides during deformation, and the chute is stuck, making subsequent disassembly difficult. In the present embodiment, the fulcrum 210 of the material distribution chute 200 is located on both sides of the upper part of the installation notch 21, and is subjected to the force components F1 and F2 of F respectively. F1 and F2 have horizontal force components to both sides respectively, so that the long rectangular bracket 20 is subjected to downward pressure and tension instead of clamping the two straight booms 10. The deformation force caused by the material distribution chute 200 being stuck is eliminated, and the problem of difficulty in disassembly caused by the chute being stuck is fundamentally solved.

[0058] It should be noted that, regarding the boom bracket, the non-hook type boom is integrated with the distribution chute, and its upper part is integrated with the distribution chute or the upper part is tightly connected to the distribution chute, so the variable length section is short, and there is no problem of the boom lengthening and failure under high temperature and load. The large hook-type blast furnace distribution chute in the industry, the boom and the distributor are integrated, and the hook is stressed at the bottom, so there is a problem of lengthening under high temperature and heavy load, which is also a problem that the industry has not been able to solve, so the hook type was later changed to a goose head type, but the goose head type is more troublesome to dismantle and install the distribution chute, while the hook type is very convenient. Therefore, the industry is in a dilemma. If the deformation and failure problem of the boom bracket of the hook-type distribution chute under high temperature and heavy load can be effectively solved, then this bottleneck problem in the industry will be satisfactorily solved. This problem has restricted many professional companies and design institutes. The structure of this application seems simple, but it has a window-penetrating effect. In fact, this problem has plagued the industry for decades.

[0059] The blast furnace distributor assembly provided by the present invention solves the problem that the upper arm bracket of the blast furnace distributor becomes longer under high temperature conditions, causing poor stability of the distribution angle of the distribution chute and the distribution angle to become smaller beyond the adjustment range, which seriously affects the industry problem of ironmaking production, and can solve the problem of the arm bracket and the distribution chute being stuck and burning out of efficiency. Specifically, in the blast furnace distributor assembly, the force point of the blast furnace distributor arm bracket is moved upward, the variable length basic size is shortened, and at the same time, the relatively high temperature area in the lower part is avoided, and the influence of the easily lengthened part of the original lower part of the arm is completely eliminated. The lengthening effect of the side arm only leaves the relatively low temperature part in the upper interval. When the length is short and the temperature is relatively low, the lengthening effect of the arm can be reduced to the permissible range. The central fulcrum of the material distribution chute and the bracket is divided into two fulcrums, each close to the boom on both sides, making it difficult for the bracket to bend downward. The two fulcrums of the material distribution chute are on the upper parts of the notch of the rectangular notch beam, so that the fulcrums are close to the booms on both sides. In addition, the closer they are, the larger the cross section is, the more difficult it is to bend, and the problem of the beam bending and lengthening downward is solved. At the same time, the horizontal bending part of the boom is replaced by opening a notch on the cabinet-shaped bracket, and the boom bracket lengthens downward, and the impact can be effectively dealt with. The arc sections in the horizontal direction of the two booms are cancelled, and the bracket of the boom bracket is changed to a rectangular trapezoidal notch bracket or a rectangular arc notch bracket, and the bracket and the boom are locked with wedges. The part of the boom pulled downward rises to the upper part of the cabinet-shaped notch beam through friction. The length of the boom under tensile force is shorter than the original material distribution chute pressed on the center bottom of the bracket. The temperature of the original pulled lower part is higher than that of the upper part, and the lower part that is easier to lengthen is eliminated, and one of the factors of the lengthening problem is solved.

[0060] Compared with the prior art, the arm bracket of the blast furnace distributor provided by the present invention includes a straight arm and a long rectangular bracket, wherein two straight arms are provided, and the two straight arms are arranged at intervals from each other; the long rectangular bracket is locked and connected with the straight arm through a wedge locking device, and is located between the two straight arms; wherein, the long rectangular bracket is provided with an installation notch for installing a distribution chute, and the installation notch is formed by a depression from the top surface of the long rectangular bracket. Thus, the arm bracket of the blast furnace distributor is not easily deformed by heat during the use of distribution, which effectively ensures the normal distribution of the distribution chute and the stable operation of the blast furnace.

[0061] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A blast furnace distributor boom bracket, characterized in that: include: There are two straight booms, and the two straight booms are spaced apart from each other; A long rectangular bracket is locked and connected to the straight booms through a wedge locking device and is located between the two straight booms; Wherein, the long rectangular bracket is provided with an installation notch for installing the material distribution chute, and the installation notch is formed by being recessed from the top surface of the long rectangular bracket; Also includes: A burn-proof armor, mounted on the straight boom and located below the long rectangular bracket; The anti-burn armor includes two armor units, which are respectively installed on the two straight movable arms. The armor unit includes a fixed end installed on the straight movable arm by screws and a movable end facing the other armor unit.

2. The blast furnace distributor arm bracket according to claim 1, characterized in that: The wedge locking device is an upper inclined wedge structure or a bottom flat wedge structure.

3. The blast furnace distributor arm bracket according to claim 1, characterized in that: The installation notch is an open trapezoidal structure.

4. The blast furnace distributor arm bracket according to claim 1, characterized in that: The installation notch is an arc-shaped structure.

5. A blast furnace distributor assembly, characterized in that: include: The blast furnace distributor boom bracket according to any one of claims 1 to 4; A material distribution chute is installed at the installation notch.

6. The blast furnace distributor assembly according to claim 5, characterized in that: The material distribution chute is provided with two fulcrums on the installation notch, and the two fulcrums are located on both sides of the installation notch close to the two straight movable arms.

7. A blast furnace distributor, characterized in that: Comprising a blast furnace distributor assembly as claimed in claim 5 or 6.

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