An arc-shaped furnace wall casting device and its usage method

Abstract

The present invention relates to a casting device for an arc-shaped furnace wall, which comprises a bottom ring beam, a plurality of formwork vertical bars, a plurality of lower columns, an arc-shaped formwork, a plurality of connecting ring beams, a plurality of jacking devices, a plurality of legs, a plurality of upper columns and a top ring beam. The formwork vertical bars are of an obtuse angle structure, one end of which is connected to the bottom ring beam, and the middle part of the lower column is connected to the other end of the formwork vertical bar. The arc-shaped formwork is installed on the outer sides of the formwork vertical bars and the lower columns. The connecting ring beams connect the bottoms of adjacent lower columns. The jacking devices jack up the connecting ring beams. The legs are connected to the lower columns through second cross bars. The bottom of the upper column is connected to the top of the lower column. The top ring cross beam is connected to the tops of a plurality of upper columns. The top ring beam is of an angle steel structure. The present invention improves the casting construction efficiency of the furnace wall through the integral arc-shaped formwork, provides reliable support for the furnace top formwork through the angle steel design of the top ring beam, and the arc-shaped furnace wall casting device can move along the furnace bottom frame under the support of the lower columns and the legs, with simple operation.

Description

Technical Field

[0001] The invention belongs to the technical field of furnace wall casting, and particularly relates to an arc furnace wall casting device and a using method thereof. Background Art

[0002] Rotary hearth furnace coal-based direct reduction is a new iron-making process developed in the past 30 years. Since this process does not require fuel preparation and deep processing of raw materials, it plays a positive role in the rational utilization of natural resources and the protection of the human environment, and thus has received widespread attention in the metallurgical industry.

[0003] However, the distance between the arc furnace wall of the rotary hearth furnace and the furnace bottom frame is narrow. When using the traditional method of wooden formwork support for the casting material construction, the narrow space is not convenient for the wooden formwork support operation, and the casting construction efficiency is low. The main function of the furnace wall of the rotary hearth furnace is to maintain the temperature inside the furnace and prevent it from dissipating. In traditional construction, tie rods are required to be arranged between the formworks. However, setting tie rods on the furnace wall of the rotary hearth furnace will cause the heat to be quickly conducted to the outside of the furnace wall and dissipated. Using detachable tie rods also requires drilling holes on the furnace wall, which is not convenient for implementation. Secondly, a full hall of scaffolding needs to be erected for the casting construction on the furnace top, with a large workload and a long construction period. Summary of the Invention

[0004] The main object of the invention is to provide an arc furnace wall casting device and a using method thereof, which can effectively solve the technical problems in the prior art that the casting construction is difficult and the casting construction efficiency is low due to the narrow distance between the arc furnace wall and the furnace bottom frame.

[0005] To achieve the above object, the invention is realized through the following technical solutions:

[0006] An arc furnace wall casting device, comprising

[0007] A bottom ring beam,

[0008] A plurality of formwork vertical bars, the formwork vertical bars are of an obtuse angle structure, and one end of the formwork vertical bars is fixedly connected to the bottom ring beam;

[0009] A plurality of lower columns, the middle part of the lower columns is fixedly connected to the other end of the formwork vertical bars, and the bottom of the lower columns is fixedly connected to the middle part of the formwork vertical bars through a first cross bar;

[0010] An arc formwork, which is fixedly installed on the outer sides of the formwork vertical bars and the lower columns;

[0011] A plurality of connecting ring beams, which are fixedly connected to the bottoms of adjacent lower columns;

[0012] A plurality of jacking devices, which are used to jack up the connecting ring beams;

[0013] A plurality of legs, the legs being parallel to the lower column, and the legs being fixedly connected to the lower column through a second cross bar;

[0014] A plurality of upper columns, the bottom of the upper columns being fixedly connected to the top of the lower column; and

[0015] A top ring beam, the top ring beam being fixedly connected to the tops of the plurality of upper columns, and the top ring beam being of angle steel structure.

[0016] Optionally, the tightening device includes

[0017] An L-shaped base, the L-shaped base including a horizontal side and a vertical side;

[0018] A pin shaft, the pin shaft being fixedly installed in the middle of the horizontal side;

[0019] A deflection arm, the deflection arm being of fan-shaped structure and rotatably connected to the pin shaft;

[0020] A tightening head, the tightening head being fixedly installed on the left side of the deflection arm;

[0021] An adjusting bolt, the adjusting bolt being arranged on the right side of the deflection arm.

[0022] Optionally, a first intermediate ring beam is fixedly connected between the plurality of lower columns.

[0023] Optionally, a second intermediate ring beam is fixedly connected between the plurality of upper columns.

[0024] Optionally, a triangular plate is fixedly installed between the formwork vertical bars and the first cross bar.

[0025] A using method of an arc furnace wall pouring device, comprising the following steps:

[0026] S1: Place the arc furnace wall pouring device on the furnace bottom frame, make the lower column and the legs perpendicular to the top plane of the furnace bottom frame, and make the bottom of the arc formwork fit with the stone fiber ring on the side of the furnace wall ring beam;

[0027] S2: Push the connecting ring beam outward through the tightening device, so that the arc formwork moves outward to squeeze the stone fiber ring, and the arc formwork fits tightly with the stone fiber ring;

[0028] S3: Install a limiting device in parallel between the top ring beam and the furnace wall steel structure, the length of the limiting device being equal to the furnace wall thickness specified in the design drawing, check or adjust the perpendicularity of the upper column and the arc formwork, and after meeting the requirements, fixedly install the limiting device between the furnace wall steel structure and the top ring beam;

[0029] S4: Seal both sides of the arc-shaped formwork, and then pour casting material between the arc-shaped formwork and the fiberboard to complete the casting of the lower furnace wall;

[0030] S5: Fix and install wooden formwork on the outside of the upper column, and then pour casting material between the wooden formwork and the fiberboard to complete the casting of the upper furnace wall;

[0031] S6: On the opposite sides of the furnace body, two arc-shaped furnace wall casting devices can be constructed simultaneously. After the upper furnace wall and the lower furnace wall are both constructed, erect a horizontal steel beam in the groove formed by the angle steel of the top ring beam and lay the furnace top formwork. Finally, pour casting material into the furnace top formwork to complete the casting of the furnace top;

[0032] S7: After the furnace top is cast and formed, remove the horizontal steel beam and the furnace top formwork, loosen the tightening device, so that the arc-shaped formwork and the wooden formwork are separated from the formed furnace wall, and under the support of the lower column and the legs, move the arc-shaped furnace wall casting device along the furnace bottom frame to the next fan-shaped segment for the casting of the furnace wall and the furnace top.

[0033] Optionally, in step S1, before installing the arc-shaped furnace wall casting device, it is necessary to check and ensure that the top plane of the furnace bottom frame is flat.

[0034] Optionally, in step S1, before installing the arc-shaped furnace wall casting device, it is necessary to install the fiberboard located on the furnace wall in place.

[0035] Optionally, in step S3, the limiting device is a channel steel.

[0036] Optionally, in step S6, before erecting the horizontal steel beam, it is necessary to remove the limiting device.

[0037] The present invention provides an arc-shaped furnace wall casting device and its usage method, having the following beneficial effects;

[0038] The arc-shaped furnace wall casting device can be directly placed on the furnace bottom frame, and the furnace wall is cast through the integral arc-shaped formwork, greatly improving the casting construction efficiency of the furnace wall. The design of the angle steel of the top ring beam provides reliable support for the casting of the furnace top, eliminating the need to erect a large number of scaffolds, reducing the workload of the furnace top casting, and under the support of the lower column and the legs, the arc-shaped furnace wall casting device can move along the furnace bottom frame to the next fan-shaped segment for the casting of the furnace wall and the furnace top, with simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of the arc-shaped furnace wall casting device of the present invention;

[0040] Figure 2 is a schematic structural diagram of the tightening device of the present invention;

[0041] Figure 3Schematic diagram of the furnace wall pouring construction of the present invention.

[0042] In the figure: 1. Bottom ring beam; 2. Formwork vertical reinforcement; 3. Lower column; 4. First cross bar; 5. Arc formwork; 6. Connecting ring beam; 7. Tightening device; 71. L-shaped base; 72. Pin shaft; 73. Deflection arm; 74. Tightening head; 75. Adjusting bolt; 8. Leg; 9. Second cross bar; 10. Upper column; 11. Top ring beam; 12. First intermediate ring beam; 13. Second intermediate ring beam; 14. Wood formwork; 15. Triangular plate; 101. Furnace bottom frame; 102. Furnace wall ring beam; 103. Stone fiber ring; 104. Limiting device; 105. Fiber board; 106. Castable; 107. Furnace top steel structure; 108. Horizontal steel section; 109. Furnace wall steel structure. Detailed implementation manners

[0043] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0046] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless specifically defined otherwise. In addition, the terms "mounted", "connected" and "coupled" should be construed broadly. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0047] An embodiment is as follows Figures 1 - 3 As shown, an arc furnace wall casting device includes a bottom ring beam 1, a plurality of formwork vertical bars 2, a plurality of lower columns 3, an arc formwork 5, a plurality of connecting ring beams 6, a plurality of jacking devices 7, a plurality of legs 8, a plurality of upper columns 10 and a top ring beam 11. The formwork vertical bar 2 is of an obtuse angle structure with the opening facing inwards. One end of the formwork vertical bar 2 is fixedly connected to the bottom ring beam 1. The middle of the lower column 3 is fixedly connected to the other end of the formwork vertical bar 2. The bottom of the lower column is fixedly connected to the middle of the formwork vertical bar 2 through a first cross bar 4. The arc formwork 5 is fixedly installed on the outer sides of the formwork vertical bar 2 and the lower column 3. The formwork vertical bar 2 and the lower column 3 are used to support the arc formwork 5. The arc formwork 5 is an integral Z-shaped structure and is adapted to the radian of the furnace wall to be cast. The connecting ring beam 6 is fixedly connected to the bottoms of adjacent lower columns 3. The jacking device 7 is used to jack the connecting ring beam 6. The jacking device 7 can also jack other positions of the arc furnace wall casting device as long as it can move the arc formwork 5 outwards. The leg 8 is parallel to the lower column 3. The bottoms of the leg 8 and the lower column 3 are at the same height. The leg 8 is fixedly connected to the lower column 3 through a second cross bar 9. It is more stable that the leg 8, the lower column 3 and the second cross bar 9 are fixedly connected into a rectangular frame. The bottom of the upper column 10 is fixedly connected to the top of the lower column 3. The top ring beam 11 is fixedly connected to the tops of the plurality of upper columns 10. The top ring beam 11 is of an angle steel structure. Among them, in specific operations, the side facing the furnace bottom frame 101 is the inner side, and the side away from the furnace bottom frame 101 is the outer side.

[0048] In a specific embodiment, the tightening device 7 includes an L-shaped base 71, a pin shaft 72, a deflection arm 73, a tightening head 74, and an adjustment bolt 75. The L-shaped base 71 includes a horizontal side and a vertical side. The pin shaft 72 is fixedly installed in the middle of the horizontal side. The deflection arm 73 is a fan-shaped structure and is rotatably connected to the pin shaft 72. The deflection arm 73 can move freely on the pin shaft 72. The tightening head 74 is fixedly installed on the left side of the deflection arm 73. The adjustment bolt 75 is arranged on the right side of the deflection arm 73 and is threadedly connected to the deflection arm 73. When the adjustment bolt 75 is turned, the adjustment bolt 75 will push against the horizontal side to drive the right side of the deflection arm 73 to rise or fall, thereby driving the deflection arm 73 to rotate around the pin shaft 72. During the adjustment process, the tightening head 74 on the left side of the deflection arm 73 will move in an arc.

[0049] In a specific embodiment, a first intermediate ring beam 12 is fixedly connected between the plurality of lower columns 3.

[0050] In a specific embodiment, a second intermediate ring beam 13 is fixedly connected between the plurality of upper columns 10. The first intermediate ring beam 12 and the second intermediate ring beam 13 support and reinforce the arc-shaped furnace wall pouring device.

[0051] In a specific embodiment, a triangular plate 15 is fixedly installed between the formwork vertical bars 2 and the first cross bar 4. The triangular plate 15 stabilizes the connection between the formwork vertical bars 2 and the first cross bar 4, which is beneficial to transmitting the force of the tightening device 7 on the connecting ring beam 6 to the formwork vertical bars 2.

[0052] In this embodiment, the lower columns 3, the upper columns 10, the connecting ring beam 6, the bottom ring beam 1, and the second intermediate ring beam 13 are all rectangular steel structures. The first intermediate ring beam 12 is a channel steel structure. The bottom ring beam 1, the top ring beam 11, the first intermediate ring beam 12, and the second intermediate ring beam 13 are all adapted to the curvature of the furnace wall to be poured.

[0053] The present invention provides a method for using an arc-shaped furnace wall pouring device, which includes the following steps:

[0054] S1: Before installing the arc-shaped furnace wall pouring device, it is necessary to check and ensure that the top plane of the furnace bottom frame 101 is flat. Since the furnace wall includes a fiber board 105 and a castable 106, it is necessary to install the fiber board 105 on the furnace wall in place before installing the arc-shaped furnace wall pouring device. Then, place the arc-shaped furnace wall pouring device on the furnace bottom frame 101 from above the furnace top steel structure 107, so that the lower columns 3 and the legs 8 are perpendicular to the top plane of the furnace bottom frame 101, and the bottom of the arc-shaped formwork 5 is in contact with the stone fiber ring 103 on the side of the furnace wall ring beam 102. The stone fiber ring 103 has a certain compressibility and is in close contact with the arc-shaped formwork 5, which can play a role in preventing slurry leakage.

[0055] S2: The connecting ring beam 6 is tightened and moved outward by the tightening device 7, so that the arc template 5 moves outward to squeeze the stone fiber ring 103 on the side of the furnace wall ring beam 102. The arc template 5 is tightly fitted with the stone fiber ring 103. Specifically, the horizontal side is tightly against the top plane of the furnace bottom frame 101, and the vertical side is tightly against the vertical side of the furnace bottom frame 101. In the initial state, the left side of the deflection arm 73 is higher than the right side of the deflection arm 73, and the tightening head 74 is at a higher position to hold the connecting ring beam 6. Then, by screwing the adjusting bolt 75, the adjusting bolt 75 is adjusted. The horizontal edge is pressed to raise the right side of the deflection arm 73, so that the height of the tightening head 74 on the left side of the deflection arm 73 is reduced, and the connecting ring beam 6 is pressed to move outward. The connecting ring beam 6 moves the arc template 5 outward through the first cross bar 4 to squeeze the stone fiber ring 103, so that the arc template 5 and the stone fiber ring 103 are closely fitted, and in the process of the deflection arm 73 rotating around the pin shaft 72, an inward component force is generated on the pin shaft 72, which can make the vertical edge of the L-shaped base 71 tightly hook the vertical side edge of the furnace bottom frame 101, and fix it firmly and not easy to loosen;

[0056] S3: Install the limit device 104 in parallel between the top ring beam 11 and the furnace wall steel structure 109. The length of the limit device 104 is equal to the furnace wall thickness specified in the design drawing to ensure that the furnace wall thickness meets the design requirements. The limit device 104 is a channel steel. Check and adjust the verticality of the upper column 10 and the arc template 5. After it meets the requirements, fix the limit device 104 between the furnace wall steel structure 109 and the top ring beam 11;

[0057] S4: sealing both sides of the arc-shaped template 5, and then injecting the casting material 106 between the arc-shaped template 5 and the fiberboard 105 to complete the casting of the lower furnace wall;

[0058] S5: A wooden template 14 is fixedly installed on the outer side of the upper column 10, and the curvature of the wooden template 14 is also adapted to the curvature of the furnace wall to be cast. Then, a casting material 106 is injected between the wooden template 14 and the fiberboard 105 to complete the casting of the upper furnace wall;

[0059] S6: Two arc furnace wall casting devices can be constructed at the same time on the opposite sides of the furnace bottom frame 101. After the upper furnace wall and the lower furnace wall are constructed, the horizontal steel 108 is set up in the groove formed by the angle steel of the top ring beam 11 and the furnace top template is laid. Before setting up the horizontal steel 108, the limit device 104 needs to be removed. Finally, the casting material is injected into the furnace top template to complete the furnace top casting.

[0060] S7: After the furnace roof is cast, the horizontal steel 108 and the furnace roof formwork are removed, and the top tightening device 7 is loosened to separate the arc formwork 5 and the wooden formwork 14 from the formed furnace wall. With the support of the lower column 3 and the support leg 8, the arc furnace wall casting device is moved along the furnace bottom frame 101 to the next fan-shaped section for casting the furnace wall and furnace roof.

[0061] The arc-shaped furnace wall casting device of the present invention can be directly placed on the furnace bottom frame 101, and the furnace wall is cast through the integral arc-shaped formwork 5, which greatly improves the casting construction efficiency of the furnace wall. The angle steel design of the top ring beam 11 provides reliable support for the furnace top formwork for furnace top casting, eliminating the need to set up a large number of scaffolding, reducing the workload of furnace top casting, and the arc-shaped furnace wall casting device can move along the furnace bottom frame 101 to the next fan-shaped segment for casting the furnace wall and furnace top under the support of the lower column 3 and the leg 8, with simple operation.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An arc-shaped furnace wall casting device, characterized in that: including a bottom ring beam, a plurality of formwork vertical reinforcements, the formwork vertical reinforcements being of an obtuse angle structure, and one end of the formwork vertical reinforcements being fixedly connected to the bottom ring beam; a plurality of lower columns, the middle of the lower columns being fixedly connected to the other end of the formwork vertical reinforcements, and the bottom of the lower columns being fixedly connected to the middle of the formwork vertical reinforcements through a first cross bar; an arc-shaped formwork, the arc-shaped formwork being fixedly installed on the outer sides of the formwork vertical reinforcements and the lower columns; a plurality of connecting ring beams, the connecting ring beams being fixedly connected to the bottoms of adjacent lower columns; a plurality of jacking devices, the jacking devices being used for jacking the connecting ring beams; a plurality of legs, the legs being parallel to the lower columns, and the legs being fixedly connected to the lower columns through a second cross bar; a plurality of upper columns, the bottoms of the upper columns being fixedly connected to the tops of the lower columns; and a top ring beam, the top ring beam being fixedly connected to the tops of the plurality of upper columns, and the top ring beam being of an angle steel structure; the jacking device includes an L-shaped base, the L-shaped base including a horizontal side and a vertical side; a pin shaft, the pin shaft being fixedly installed in the middle of the horizontal side; a deflection arm, the deflection arm being of a fan-shaped structure and being rotatably connected to the pin shaft; a jacking head, the jacking head being fixedly installed on the left side of the deflection arm; an adjusting bolt, the adjusting bolt being arranged on the right side of the deflection arm.

2. The casting device for an arc-shaped furnace wall according to claim 1, characterized in that: A first intermediate ring beam is fixedly connected between the plurality of lower columns.

3. The pouring device for an arc furnace wall according to claim 1, characterized in that: A second intermediate ring beam is fixedly connected between the plurality of upper columns.

4. The pouring device for an arc furnace wall according to claim 1, characterized in that: A triangular plate is fixedly installed between the formwork vertical reinforcement and the first cross bar.

5. A method of using the arc-shaped furnace wall pouring device according to any one of claims 1-4, characterized in that, including the following steps: S1: Place the arc-shaped furnace wall pouring device on the furnace bottom frame, make the lower columns and the legs stand vertically on the top plane of the furnace bottom frame, and make the bottom of the arc-shaped formwork fit with the stone fiber ring on the side of the furnace wall ring beam; S2: Jack the connecting ring beam through the jacking device to move outward, so that the arc-shaped formwork moves outward to squeeze the stone fiber ring, and the arc-shaped formwork fits tightly with the stone fiber ring; S3: Install a limiting device in parallel between the top ring beam and the furnace wall steel structure, the length of the limiting device being equal to the furnace wall thickness specified in the design drawing, check and adjust the verticality of the upper columns and the arc-shaped formwork, and after meeting the requirements, fixedly install the limiting device between the furnace wall steel structure and the top ring beam; S4: Seal both sides of the arc-shaped formwork, and then inject casting material between the arc-shaped formwork and the fiber board to complete the pouring of the lower furnace wall; S5: Fix and install a wooden formwork on the outer side of the upper columns, and then inject casting material between the wooden formwork and the fiber board to complete the pouring of the upper furnace wall; S6: Construction of two arc-shaped furnace wall pouring devices can be carried out simultaneously on the opposite sides of the furnace body. After the construction of both the upper furnace wall and the lower furnace wall is completed, erect a horizontal section steel in the groove formed by the angle steel of the top ring beam and lay the furnace top formwork, and finally inject casting material into the furnace top formwork to complete the furnace top pouring; S7: After the furnace top pouring is formed, remove the horizontal section steel and the furnace top formwork, loosen the jacking device, make the arc-shaped formwork and the wooden formwork separate from the formed furnace wall, and move the arc-shaped furnace wall pouring device along the furnace bottom frame under the support of the lower columns and the legs to the next fan-shaped section for pouring of the furnace wall and the furnace top.

6. The usage method of a curved furnace wall pouring device according to claim 5, characterized in that: In step S1, before installing the arc furnace wall casting device, it is necessary to check and ensure that the top plane of the furnace bottom frame is flat.

7. The usage method of an arc-shaped furnace wall pouring device according to claim 5, characterized in that: In step S1, before installing the arc furnace wall casting device, it is necessary to install the fiberboard located on the furnace wall in place.

8. The usage method of a pouring device for an arc-shaped furnace wall according to claim 5, characterized in that: In step S3, the limiting device is a channel steel.

9. The usage method of a curved furnace wall casting device according to claim 5, characterized in that: In step S6, before erecting the horizontal section steel, it is necessary to remove the limiting device.

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