Blast furnace top flange installation adjusting structure and adjusting method

Abstract

The invention discloses a blast furnace top flange mounting and adjusting structure and an adjusting method, belongs to the field of metallurgical blast furnaces, and aims to reduce adjusting errors, improve mounting precision, reduce labor intensity and reduce labor cost. Comprising the following steps: temporarily supporting a furnace top flange by adopting an adjusting and supporting mechanism; erecting a dial indicator; adjusting the adjusting support mechanism, and observing the data change of the dial indicator until the theoretical data requirement is met; welding the furnace top flange to the furnace shell; during welding, data changes of the dial indicator are observed constantly, and welding parameters are adjusted to complete welding of the furnace top flange. The elevation and the transverse and longitudinal centers of the furnace top flange are guided to be adjusted through visual data of the dial indicator, so that the adjusting process is simpler, and the adjusting efficiency is higher. In the welding process, data changes in the whole welding process are monitored through visual data of the dial indicator, corresponding adjustment of the welding angle, speed, position and the like is guided, empirical data are changed into data changes capable of being visually observed, the installation quality is ensured, manpower and material resources are saved, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical blast furnaces, and specifically relates to a blast furnace top flange installation adjustment structure and an adjustment method. Background Art

[0002] The top flange of a blast furnace is a key part of the operation of the entire blast furnace equipment. The lower part bears the furnace body, and the upper part bears the source of materials. The accuracy of the installation and welding of the top flange determines the uniformity of the material feeding, the uniformity of the heating of the furnace body materials, and the balance of the furnace body load-bearing. The welding accuracy requirement of the top flange installation is the most stringent requirement for the installation accuracy of the entire blast furnace equipment. At present, the operation process of the top flange installation is: hoist the top flange to the top of the furnace, and after the first measurement by the indium steel ruler and the level, start manual adjustment. While adjusting, construction personnel read the data through the indium steel ruler and the level, and repeat the operation. The whole process usually requires four or five times, or even more repeated adjustments and repeated readings through the indium steel ruler and the level, until the data read by the indium steel ruler and the level meet the design requirements before welding. The operation is relatively cumbersome, and there are a series of errors such as reading errors, which is not conducive to the control of installation accuracy. Summary of the invention

[0003] The purpose of the present invention is to provide a blast furnace top flange installation adjustment structure and an adjustment method, so as to reduce the adjustment error and improve the installation accuracy.

[0004] The technical solution adopted by the present invention is: a blast furnace top flange installation and adjustment structure, including a furnace top flange and a furnace shell, including a dial indicator and an adjustment support mechanism; a plurality of dial indicators for measuring elevations are evenly arranged around the outer circumference of the furnace top flange, and each dial indicator for measuring elevations is centered on the outer circumferential surface of the furnace top flange; there is at least one pair of dial indicators for measuring radial data, and a pair of dial indicators for measuring radial data are respectively centered on the two ends of the furnace top flange; a plurality of sets of adjustment support mechanisms are evenly arranged around the outer circumference of the furnace shell, and each set of adjustment support mechanisms includes an adjustment bevel pad, a horizontal support block and a mounting block, the top surface of the horizontal support block is horizontally arranged, the adjustment bevel pad is supported on the top surface of the horizontal support block, and a sliding pair is formed between the bottom surface of the adjustment bevel pad and the top surface of the horizontal support block; the inner end of the horizontal support block is fixed to the outer wall of the furnace shell, and the mounting block is fixed to the outer end of the horizontal support block; the adjustment bolt passes through the mounting block in the horizontal direction and its end acts on the tail of the adjustment bevel pad.

[0005] Furthermore, several sets of brackets are evenly arranged around the outer circumference of the furnace shell, and the number of the brackets is equal to the number of dial indicators for measuring the elevation; the dial indicators are installed on the brackets.

[0006] Furthermore, the bracket is in an inverted L shape, including a horizontal rod and a vertical rod; the vertical rod is vertically arranged, the bottom end of which is welded to the outer wall of the furnace shell, and the top end extends upward and is higher than the furnace top flange; one end of the horizontal rod is fixed to the top, and the other end extends horizontally inward along the radial direction of the furnace shell; the dial indicator for measuring the elevation is installed on the vertical rod of the bracket; the dial indicator for measuring the radial data is installed on the horizontal rod of the bracket.

[0007] Furthermore, it also includes a triangular support plate arranged between the furnace top flange and the furnace shell for temporarily fixing the furnace top flange.

[0008] The blast furnace top flange installation method comprises the following steps:

[0009] Step 1: hoist the furnace top flange to the top of the furnace shell, and use the adjustment support mechanism to temporarily support the furnace top flange;

[0010] Step 3: Measure the top surface elevation data of the furnace top flange, as well as the horizontal and vertical center data;

[0011] Step 4: Set up the dial indicator;

[0012] Step 5: Calculate the change value of the dial indicator data according to the theoretical data, repeatedly adjust the support mechanism, and observe the data of the dial indicator until the theoretical data requirements are met;

[0013] Step 6: Remeasure the top surface elevation data of the furnace top flange, as well as the horizontal and vertical center data;

[0014] Step 7: Temporarily fix the furnace top flange to the furnace shell;

[0015] Step 8. Weld the furnace top flange to the furnace shell in a symmetrical manner; during welding, always observe the changes in the dial indicator data, and adjust the welding position, angle, speed and other parameters according to the changes in the dial indicator data until the welding of the entire furnace top flange is completed;

[0016] Step 9: Dismantle and install the adjustment structure.

[0017] Furthermore, in step 4, a bracket is used to set up a dial indicator, and the specific operation is as follows:

[0018] Four sets of brackets are evenly arranged around the outer circumference of the furnace shell; the brackets are in an inverted L shape, including a cross bar and a vertical bar; the vertical bar is arranged vertically, the bottom end of which is welded to the outer wall of the furnace shell, and the top end extends upward and is higher than the furnace top flange; one end of the cross bar is fixed to the top end, and the other end extends horizontally inward along the radial direction of the furnace shell;

[0019] A dial indicator for measuring elevation is installed on the vertical pole of each set of brackets, and a dial indicator for measuring radial data is installed on the horizontal pole of the bracket.

[0020] Furthermore, in step seven, a plurality of triangular support plates evenly distributed along the circumferential direction of the furnace shell are used to temporarily fix the furnace top flange and the furnace shell.

[0021] Furthermore, the triangular support plate is a right-angled triangle, the hypotenuse of which fits the outer wall of the furnace shell and is spot-welded and fixed; the horizontal right-angled side thereof fits the bottom surface of the furnace top flange and is spot-welded and fixed.

[0022] Furthermore, the top surface elevation of the furnace top flange is measured by an indium steel ruler and a level; and the horizontal and vertical center data are measured by a plumb line.

[0023] Beneficial effects of the present invention: The setting of the dial indicator can guide the adjustment of the elevation and the horizontal and vertical center of the furnace top flange through the visual data of the dial indicator, making the adjustment process simpler and more efficient. During the welding process, the visual data of the dial indicator can be used to monitor the data changes in the entire welding process, guide the corresponding adjustments of the welding angle, speed, position, etc., and turn the empirical data into data changes that can be clearly visually observed, thereby ensuring the installation quality, saving manpower and material resources, and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the present invention;

[0025] Figure 2 for Figure 1 A local enlarged view of point A;

[0026] Figure 3 for Figure 1 A partial enlarged view of point B;

[0027] Figure 4 Schematic diagram of the triangular support plate.

[0028] In the figure, furnace top flange 1, dial indicator 2, bracket 3, cross bar 3A, vertical bar 3B, adjustment bolt 4, adjustment inclined pad 5, horizontal support block 6, mounting block 7, triangular support plate 8, furnace shell 9. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0030] The words "top", "bottom", "left", "right", "inside", "outside" and the like indicating directions in the present invention are based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] Blast furnace top flange installation adjustment structure, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a furnace top flange 1 and a furnace shell 9, including a dial gauge 2 and an adjustment support mechanism; several dial gauges 2 for measuring the elevation are evenly arranged around the outer circumference of the furnace top flange 1, and each dial gauge 2 for measuring the elevation is centered on the outer circumferential surface of the furnace top flange 1; there is at least one pair of dial gauges 2 for measuring radial data, and a pair of dial gauges 2 for radial data measurement are respectively centered on the two ends of the furnace top flange 1; several sets of the adjustment support mechanism are evenly arranged around the outer circumference of the furnace shell 9, and each set of the adjustment support mechanism includes an adjustment bevel pad 5, a horizontal support block 6 and a mounting block 7, the top surface of the horizontal support block 6 is horizontally arranged, the adjustment bevel pad 5 is supported on the top surface of the horizontal support block 6, and a sliding pair is formed between the bottom surface of the adjustment bevel pad 5 and the top surface of the horizontal support block 6; the inner end of the horizontal support block 6 is fixed to the outer wall of the furnace shell 9, and the mounting block 7 is fixed to the outer end of the horizontal support block 6; the adjustment bolt 4 passes through the mounting block 7 in the horizontal direction and its end acts on the tail of the adjustment bevel pad 5.

[0032] In order to facilitate the installation of the dial gauge 2, several sets of brackets 3 are evenly arranged around the outer circumference of the furnace shell 9, and the number of brackets 3 is equal to the number of dial gauges 2 for measuring the elevation; the dial gauge 2 is installed on the brackets 3. In order to meet the requirements of monitoring and adjustment, at least four positions spaced 90° apart are required to be adjusted around the furnace top flange 1. In order to meet the adjustment accuracy requirements while saving materials and investment in dial gauges, four sets of brackets 3, four dial gauges 2 for measuring elevation, and four dial gauges 2 for measuring radial data are provided.

[0033] A support rod, a suspension rod, etc. that are independent of the furnace shell 9 can be used as a bracket. However, if the bracket is independent of the furnace shell 9, there are problems such as displacement between the bracket and the furnace shell 9 during use. Once the position of the bracket changes, the position of the dial indicator installed thereon will change, which may cause the reading of the dial indicator to change, affecting the accuracy of monitoring. In this embodiment, the bracket 3 is in an inverted L shape, including a crossbar 3A and a vertical bar 3B; the vertical bar 3B is vertically arranged, and its bottom end is welded to the outer wall of the furnace shell 9, and the top extends upward and higher than the furnace top flange 1; one end of the crossbar 3A is fixed to the top, and the other end extends horizontally inward along the radial direction of the furnace shell 9; the dial indicator 2 for measuring the elevation is installed on the vertical bar 3B of the bracket 3; the dial indicator 2 for measuring the radial data is installed on the crossbar 3A of the bracket 3. The inverted L-shaped bracket 3 can be processed by channel steel, for example, using on-site 80 channel steel material. The steel bracket 3 has good rigidity and strength, which meets the requirements for the installation of the dial indicator.

[0034] Furthermore, it also includes a triangular support plate 8 disposed between the furnace top flange 1 and the furnace shell 9 for temporarily fixing the furnace top flange 1. The triangular support plate 8 can be made from scraps of steel plates with a diameter of δ=20 mm available on site.

[0035] The method for installing a blast furnace top flange using the blast furnace top flange installation and adjustment structure according to the claim comprises the following steps:

[0036] Step 1: hoist the furnace top flange 1 to the top of the furnace shell 9, and use an adjustable support mechanism to temporarily support the furnace top flange 1.

[0037] The adjustment support mechanism includes an adjustment bevel pad 5, a horizontal support block 6 and a mounting block 7. The top surface of the horizontal support block 6 is horizontally arranged, the adjustment bevel pad 5 is supported on the top surface of the horizontal support block 6, and a sliding pair is formed between the bottom surface of the adjustment bevel pad 5 and the top surface of the horizontal support block 6; the inner end of the horizontal support block 6 is fixed to the outer wall of the furnace shell 9, and the mounting block 7 is fixed to the outer end of the horizontal support block 6; the adjustment bolt 4 passes through the mounting block 7 in the horizontal direction and its end acts on the tail of the adjustment bevel pad 5.

[0038] There are four sets of adjustment support mechanisms, two of which are arranged on the left and right sides of the furnace shell 9 along the horizontal direction of the furnace shell 9, and the other two are arranged on the front and rear ends of the furnace shell 9 along the longitudinal direction of the furnace shell 9. After the furnace top flange 1 is hoisted, its bottom surface is supported on the top inclined surface of the adjustment pad 5, and the top inclined surface of the adjustment pad 5 gradually tilts downward along the radial direction of the furnace shell 9. In this way, when the adjustment bolt 4 pushes the adjustment pad 5 to move radially inward on the horizontal support block 6, the adjustment pad 5 raises the furnace top flange 1; when the adjustment bolt 4 drives the adjustment pad 5 to move radially outward on the horizontal support block 6, the furnace top flange 1 is lowered. Through the cooperation of the four sets of adjustment support mechanisms, the height and center of the furnace top flange 1 can be adjusted to the required requirements. During the adjustment process, the furnace top flange 1 is always supported on the adjustment pad 5, and the adjustment is convenient and simple. The adjustment support mechanism plays a dual role of adjustment and support.

[0039] Step 3: Measure the elevation data of the top surface of the furnace top flange 1, as well as the horizontal and vertical center data. After the furnace top flange (1) is hoisted in place, the elevation data and center data of the top surface of the furnace top flange 1 are measured using an indium steel ruler and a level. The data measured at this time are the initial measured data.

[0040] Step 4, set up the dial indicator 2. Six dial indicators are used in the present invention. If a plane rectangular coordinate system is established on the horizontal plane with the center of the furnace top flange 1 as the origin, then four of the dial indicators are used to monitor the elevation of the furnace top flange 1, and are arranged around the outer periphery of the furnace top flange 1, respectively arranged on the X-axis and Y-axis of the rectangular coordinate system, and centered on the outer peripheral side wall of the furnace top flange 1; the other two dial indicators are used to monitor the radial data of the furnace top flange 1, and are respectively arranged on the X-axis and Y-axis of the rectangular coordinate system, which are centered on the top surface of the furnace top flange 1. The dial indicator 2 for monitoring the elevation of the furnace top flange 1 and the dial indicator 2 for monitoring the radial data of the furnace top flange 1 are perpendicular to each other.

[0041] Step 5. According to the theoretical data, calculate the data change value of the dial gauge 2, repeatedly adjust the support mechanism, and observe the data change of the dial gauge 2 until the theoretical data requirements are met. The theoretical data is the data required by the drawing and also the design requirements. The difference between the initial measured data and the theoretical data minus the deviation allowed by the specification is the data change range of the dial gauge 2. During the adjustment process, the dial gauge value changes within this range, which means that the theoretical data requirements are met.

[0042] Step 6: Remeasure the top surface elevation data of the furnace top flange 1, as well as the horizontal and vertical center data;

[0043] Step 7: temporarily fix the furnace top flange 1 and the furnace shell 9;

[0044] Step 8: Weld the furnace top flange 1 to the furnace shell 9 in a symmetrical manner; during welding, always observe the dial indicator data, and adjust the welding position, angle, speed and other parameters according to the data changes of the dial indicator 2 until the welding of the entire furnace top flange 1 is completed;

[0045] Step 9: Dismantle and install the adjustment structure.

[0046] In the present invention, the setting of the dial gauge 2 can guide the adjustment of the elevation and the horizontal and vertical center of the furnace top flange 1 through the visual data of the dial gauge, making the adjustment process simpler and more efficient. During the welding process, the data changes in the entire welding process are monitored through the visual data of the dial gauge, and the corresponding adjustments of the welding angle, speed, position, etc. are guided to improve the construction efficiency. The data can be seen more accurately and intuitively, thereby converting the empirical data into data changes that can be clearly visually observed, which can better ensure the construction accuracy and installation quality, and reduce the investment of construction personnel and the labor intensity of measurement personnel.

[0047] A support independent of the furnace shell 9 can be used to set up the dial gauge. In this embodiment, the support 3 is used to set up the dial gauge 2, and the specific operation is as follows: four sets of supports 3 are evenly arranged around the outer circumference of the furnace shell 9; the support 3 is in an inverted L shape, including a crossbar 3A and a vertical bar 3B; the vertical bar 3B is arranged vertically, and its bottom end is welded to the outer wall of the furnace shell 9, and the top end extends upward and is higher than the furnace top flange 1; one end of the crossbar 3A is fixed to the top, and the other end extends horizontally inward along the radial direction of the furnace shell 9; a dial gauge 2 for measuring the elevation is installed on the vertical bar 3B of each set of supports 3, and the dial gauge 2 for measuring radial data is installed on the crossbar 3A of the support 3. By welding the support 3 to the furnace shell 9, the position of the support 3 is fixed during the entire installation process of the furnace top flange 1, thereby fixing the position of all the dial gauges 2, so that the measurement error of the dial gauge 2 caused by the installation during the entire process is reduced.

[0048] In order to prevent welding errors caused by deformation and position change during the welding of the furnace top flange 1, in step 7, a plurality of triangular support plates 8 evenly distributed along the circumference of the furnace shell 9 are used to temporarily fix the furnace top flange 1 and the furnace shell 9. The triangular support plates 8 are usually 10-16, and in this embodiment, 16 triangular support plates 8 are used.

[0049] like Figure 4 As shown, the triangular support plate 8 is a right triangle, the hypotenuse of which fits the outer wall of the furnace shell 9 and is fixed by spot welding; the horizontal right-angled side thereof fits the bottom surface of the furnace top flange 1 and is fixed by spot welding.

[0050] The top surface elevation of the furnace top flange 1 is measured by an indium steel ruler and a level; the horizontal and vertical center data are measured by a plumb line.

[0051] In the description of this specification, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace top flange installation and adjustment structure, comprising a top flange (1) and a furnace shell (9), characterized in that: It includes a dial indicator (2) and an adjustment support mechanism; Several dial gauges (2) for measuring elevation are evenly arranged around the outer circumference of the furnace top flange (1), and each dial gauge (2) for measuring elevation is centered on the outer circumference of the furnace top flange (1); at least one pair of dial gauges (2) for measuring radial data is provided, and the pair of dial gauges (2) for measuring radial data are respectively centered on the two ends of the furnace top flange (1); Several sets of the adjusting support mechanisms are evenly arranged around the outer circumference of the furnace shell (9), and each set of the adjusting support mechanisms comprises an adjusting inclined pad (5), a horizontal support block (6) and a mounting block (7). The top surface of the horizontal support block (6) is arranged horizontally, the adjusting inclined pad (5) is supported on the top surface of the horizontal support block (6), and a sliding pair is formed between the bottom surface of the adjusting inclined pad (5) and the top surface of the horizontal support block (6); the inner end of the horizontal support block (6) is fixed to the outer wall of the furnace shell (9), and the mounting block (7) is fixed to the outer end of the horizontal support block (6); the adjusting bolt (4) passes through the mounting block (7) in the horizontal direction, and its end acts on the tail of the adjusting inclined pad (5).

2. The blast furnace top flange installation and adjustment structure according to claim 1, characterized in that: Several sets of brackets (3) are evenly arranged around the outer circumference of the furnace shell (9), and the number of sets of brackets (3) is equal to the number of dial gauges (2) for measuring elevation; the dial gauges (2) are installed on the brackets (3).

3. The blast furnace top flange installation and adjustment structure according to claim 2, characterized in that: The support (3) is in an inverted L-shape, and comprises a crossbar (3A) and a vertical bar (3B); the vertical bar (3B) is arranged vertically, and its bottom end is welded to the outer wall of the furnace shell (9), and its top end extends upward and is higher than the furnace top flange (1); one end of the crossbar (3A) is fixed to the top end, and the other end extends horizontally inward along the radial direction of the furnace shell (9); a dial gauge (2) for measuring the elevation is installed on the vertical bar (3B) of the support (3); and a dial gauge (2) for measuring radial data is installed on the crossbar (3A) of the support (3).

4. The blast furnace top flange installation and adjustment structure according to any one of claims 1 to 3, characterized in that: It also includes a triangular support plate (8) which is arranged between the furnace top flange (1) and the furnace shell (9) and is used to temporarily fix the furnace top flange (1).

5. A method for installing a blast furnace top flange using the blast furnace top flange installation and adjustment structure according to claim 1, comprising the following steps: Step 1: hoist the furnace top flange (1) to the top of the furnace shell (9), and temporarily support the furnace top flange (1) by adjusting the support mechanism; Step 3: Measure the top surface elevation data of the furnace top flange (1), as well as the horizontal and vertical center data; Step 4: Set up the dial indicator (2); Step 5: Calculate the data change value of the dial indicator (2) according to the theoretical data, repeatedly adjust the support mechanism, and observe the data change of the dial indicator (2) until the theoretical data requirements are met; Step 6: Re-measure the top surface elevation data of the furnace top flange (1), as well as the horizontal and vertical center data; Step 7: temporarily fix the furnace top flange (1) and the furnace shell (9); Step 8: Weld the furnace top flange (1) to the furnace shell (9) in a symmetrical manner; during welding, constantly observe the changes in the dial indicator data, and adjust the welding position, angle, speed and other parameters according to the changes in the dial indicator (2) data until the welding of the entire furnace top flange (1) is completed; Step 9: Dismantle and install the adjustment structure.

6. The method for installing a blast furnace top flange according to claim 5, characterized in that: In step 4, the support (3) is used to set up the dial indicator (2), and the specific operation is as follows: Four sets of brackets (3) are evenly arranged around the outer circumference of the furnace shell (9); the brackets (3) are in an inverted L shape, and include a crossbar (3A) and a vertical bar (3B); the vertical bar (3B) is arranged vertically, with its bottom end welded to the outer wall of the furnace shell (9), and its top end extending upward and higher than the furnace top flange (1); one end of the crossbar (3A) is fixed to the top end, and the other end extends horizontally inward along the radial direction of the furnace shell (9); A dial gauge (2) for measuring elevation is installed on the vertical rod (3B) of each set of brackets (3), and a dial gauge (2) for measuring radial data is installed on the horizontal rod (3A) of the bracket (3).

7. The method for installing a blast furnace top flange according to claim 5, characterized in that: In step seven, a plurality of triangular support plates (8) evenly distributed along the circumferential direction of the furnace shell (9) are used to temporarily fix the furnace top flange (1) and the furnace shell (9).

8. The method for installing a blast furnace top flange according to claim 7, characterized in that: The triangular support plate (8) is a right-angled triangle, the hypotenuse of which fits the outer wall of the furnace shell (9) and is fixed by spot welding; and the horizontal right-angled side fits the bottom surface of the furnace top flange (1) and is fixed by spot welding.

9. The method for installing a blast furnace top flange according to claim 5, characterized in that: The top surface elevation of the furnace top flange (1) is measured by an indium steel ruler and a level; and the horizontal and vertical center data are measured by a plumb line.

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