Disassembling and assembling structure of bell-less blast furnace brake

Abstract

The utility model relates to the technical field of blast furnaces, in particular to a material gate dismounting structure of a bell-less blast furnace. Comprising a material gate, a lifting lug is arranged on the material gate, rolling bodies are rotationally connected to the two sides of the material gate respectively, rails matched with the rolling bodies for use are arranged below the rolling bodies, the rails are installed on a base, a driving mechanism for driving the rolling bodies to roll along the rails is arranged on the base, and an installation frame is arranged at the end of each rail. The mounting frame is fixed on the base, and a travelling crane is arranged on the mounting frame. The two sides of the material gate are respectively provided with the rolling bodies, the rails matched with the rolling bodies for use are arranged below the rolling bodies, the driving mechanism drives the rolling bodies to roll along the rails so as to drive the material gate to move, separation of the material gate and the blast furnace is achieved, then the material gate is hoisted to the ground through the traveling crane, inclined pulling and inclined dragging are avoided in the moving process, and the material gate is convenient to move. And when other important equipment is touched, disassembly and assembly are more convenient, and the safety in the replacement process is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnaces, in particular to a bellless blast furnace material gate disassembly and assembly structure. Background Art

[0002] The charging equipment of the serial tank bellless blast furnace has a simple design and compact structure. It not only realizes the continuous charging of the blast furnace, but also ensures its high sealing performance, which has become the development trend of modern blast furnaces. However, the gate used to control the discharge of the weighing bucket has been eroded and washed by sintered ore, lump ore, coke, etc. for a long time, resulting in rapid wear of the inner wall lining, and even wear and tear of the gate valve body, causing leakage and accumulation of materials in the belt corridor, which not only pollutes the environment, but also increases the cleaning load of production workers. Therefore, during the operation of the blast furnace, if the gate is worn, it needs to be replaced.

[0003] like Figure 1 As shown, the bell-less blast furnace includes a receiving tank 101, a loading gate 102, a weighing tank 103, a discharge gate 104 and an airtight box 105; here, the replacement of the discharge gate 102 is taken as an example. At this stage, when disassembling the discharge gate 102, the connecting bolts between the discharge gate 102, the weighing tank 103 and the airtight box 105 are first opened to make the discharge gate 102 active, and the crane on the top of the workshop is used to hang the hook on the lifting ear of the discharge gate 102, and a pull rope is set at the rear of the discharge gate 102, and the discharge gate 102 is pulled by the crane to move, and the rear The pull rope prevents the discharge gate 102 from shaking when it is pulled out; although the above-mentioned disassembly method can complete the replacement of the discharge gate 102, in the process of pulling the discharge gate 102 by the trolley, the driving crane will provide an upward component force, which may cause a collision between the discharge gate 102 and the weighing tank 103, and in severe cases may cause the weighing tank 103 to be damaged; and at the moment the discharge gate is pulled out, the driving crane and the pull rope will be affected by the gravity of the discharge gate, and the pull rope or the steel cable on the driving crane may break, which is very dangerous. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a bell-less blast furnace material gate disassembly and assembly structure, so that the replacement of the material gate is more convenient and safe.

[0005] The technical solution adopted by the utility model to solve its technical problems is a bell-less blast furnace material gate disassembly and assembly structure, including a material gate, a lifting lug is arranged on the material gate, rolling bodies are rotatably connected on both sides of the material gate, tracks used in conjunction with the rolling bodies are arranged below the rolling bodies, the tracks are mounted on a base, a driving mechanism for driving the rolling bodies to roll along the tracks is arranged on the base, a mounting frame is arranged at the end of the track, the mounting frame is fixed on the base, and a crane is arranged on the mounting frame.

[0006] Furthermore, a limiting groove is arranged on the track, a rack is arranged at the bottom of the limiting groove, and the rolling body includes a traveling gear used in conjunction with the rack.

[0007] Furthermore, the rolling body also includes a roller rotatably connected to the material gate, the axis of the roller is perpendicular to the axis of the traveling gear, and the roller abuts against the side wall of the limiting groove.

[0008] Furthermore, the driving mechanism includes a servo motor, and an output end of the servo motor is transmission-connected to the rolling body.

[0009] Furthermore, the driving mechanism includes manual hoists respectively arranged at both ends of the track, and the output end of the manual hoist is detachably connected to the material gate.

[0010] Furthermore, an expansion joint is provided below the material gate.

[0011] The beneficial effect of the utility model is that rolling bodies are respectively arranged on both sides of the material gate, and tracks used in conjunction with the rolling bodies are arranged below the rolling bodies. The driving mechanism drives the rolling bodies to roll along the tracks, thereby driving the material gate to move, thereby realizing the separation of the material gate from the blast furnace, and then using a crane to hoist the material gate to the ground. During the movement, the material gate is prevented from being pulled crookedly and touching other important equipment, and the disassembly and assembly are more convenient, which greatly improves the safety during the replacement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a blast furnace;

[0013] Figure 2 It is a structural schematic diagram of the utility model;

[0014] Figure 3 is a schematic diagram of a rolling element;

[0015] Figure 4 Schematic diagram of a first embodiment of a driving mechanism.

[0016] Figure numerals: 1- material gate; 101- material receiving tank; 102- material loading gate; 103- weighing tank; 104- material unloading gate; 105- airtight box; 2- rolling body; 201- traveling gear; 202- roller; 3- track; 301- limiting groove; 302- rack; 4- base; 5- mounting frame; 501- crane; 6- lifting ear; 7- expansion joint; 8- servo motor; 9- manual hoist. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] like Figure 2 As shown, the utility model of the bellless blast furnace material gate disassembly and assembly structure includes a material gate 1, the material gate 1 is provided with a lifting ear 6, both sides of the material gate 1 are rotatably connected with rolling bodies 2, a track 3 used in conjunction with the rolling body 2 is provided below the rolling body 2, the track 3 is installed on a base 4, the base 4 is provided with a driving mechanism for driving the rolling body 2 to roll along the track 3, a mounting frame 5 is provided at the end of the track 3, the mounting frame 5 is fixed on the base 4, and a crane 501 is provided on the mounting frame 5.

[0019] Among them, the material of the lifting ear 6 and the material gate 1 are both made of steel, and the connection method of the lifting ear 6 and the material gate 1 is welding; the rolling body 2 can be in the form of a car wheel, and a rotating shaft is set on both sides of the material gate 1, and the wheel is installed on the rotating shaft by using a bearing. The axis of the wheel is perpendicular to the axis of the material gate 1, and the rolling bodies 2 on both sides of the material gate 1 are consistent in height, so that the heights of the two tracks 3 are also consistent, which is more convenient for installation; the track 3 is made of steel, and the rolling body 2 is placed on the track 3 when in use. The base 4 is located between the two tracks 3. The part is hollow, and the width of the hollow part is greater than the maximum size of the material gate 1 in the radial direction, which is convenient for lifting. When the material gate 1 is hoisted to the ground; the base 4 is installed on the workshop floor and is built of steel sections and steel plates. The base 4 includes a support column and a workbench, and the track 3 is installed on the workbench by welding; the driving mechanism is used to drive the rolling body 2 to roll along the track 3. The driving mechanism can adopt an electric push rod or a hydraulic cylinder. Taking the hydraulic cylinder as an example, the output end of the hydraulic cylinder is in contact with the material gate 1, and the cylinder body of the hydraulic cylinder is fixed to the base 4. At the same time, the axial direction of the hydraulic cylinder is the same as the arrangement direction of the track 3; the mounting frame 5 is a truss built of steel sections, and a crane 501 is installed on the truss. The crane 501 is used to hoist the material gate 1 to the ground.

[0020] To prevent the rolling element 2 from sliding off the track 3; see further Figure 3 The track 3 is provided with a limiting groove 301, a rack 302 is provided at the bottom of the limiting groove 301, and the rolling body 2 includes a traveling gear 201 used in conjunction with the rack 302. The axial direction of the traveling gear 202 is also perpendicular to the arrangement direction of the track 3, and the two side walls of the limiting groove 301 can limit the traveling gear 202, so that the traveling gear 202 is always in the limiting groove 301.

[0021] In order to prevent the side wall of the gear of the driving crane 501 from contacting the side wall of the limiting groove 301 and avoid the movement of the material gate 1 from being stuck, further, see Figure 3 The rolling body 2 also includes a roller 202 rotatably connected to the material gate 1, the axis of the roller 202 is perpendicular to the axis of the traveling gear 201, and the roller 202 abuts against the side wall of the limiting groove 301. Under the action of the rollers 202 on both sides, a gap is formed between the side wall of the traveling gear 201 and the side wall of the limiting groove 301, and the rollers 202 on both sides can limit the material gate 1 to prevent the material gate 1 from running off during movement. At the same time, the rollers 202 are rotatably connected to the material gate 1, and rolling friction is generated between the rollers 202 and the side wall of the limiting groove 301, making the movement of the material gate 1 more convenient.

[0022] Embodiment 1 of the driving mechanism, see Figure 4 The driving mechanism includes a servo motor 8, and the output end of the servo motor 8 is in transmission connection with the travel gear 202. The axis direction of the output end of the servo motor 8 is perpendicular to the arrangement direction of the track 3, and the axis direction of the travel gear 202 is also perpendicular to the arrangement direction of the track 3.

[0023] Embodiment 2 of the driving mechanism, see Figure 2 The driving mechanism includes a manual hoist 9 respectively arranged at both ends of the track 3, and the output end of the manual hoist 9 is detachably connected to the material gate 1. The arrangement height of the manual hoist 9 should be consistent with the height of the connection between the manual hoist 9 and the material gate 1 to avoid generating an upward force component; the output end of the manual hoist 9 is detachably connected to the material gate 1, and the hook of the manual hoist 9 can be hung on the lifting ear 6, and when the material gate 1 moves to a suitable position, the hook is removed from the lifting ear 6.

[0024] In order to create a gap between the material gate 1 and the upper equipment, it is convenient to place the rolling body 2 on the track 3. Figure 2 , an expansion joint 7 is provided below the material gate 1. When in use, the upper and lower connecting bolts of the material gate 1 are first loosened and removed, and the expansion joint 7 is compressed, so that the material gate 1 moves downward until the rolling body 2 on the material gate 1 is connected to the track 3; the expansion joint 7 continues to be compressed until the expansion joint 7 is separated from the material gate 1.

[0025] The specific operation process of the utility model is as follows:

[0026] S1: The blast furnace is shut down, the wind is stopped, and nitrogen is purged. A base 4, a track 3, a mounting frame 5, and a crane 501 are built outside the blast furnace. Rolling bodies 2 are installed on both sides of the old material gate 1, and a driving mechanism is installed on the base 4.

[0027] S2: Loosen and remove the upper and lower connecting bolts of the old material gate 1, so that the rolling body 2 falls on the track 3, and use the driving mechanism to drive the rolling body 2 to roll on the track 3 until the old material gate 1 moves to the bottom of the traveling crane 501, and the driving mechanism stops;

[0028] S3: Connect the hook and the lifting ear 6 on the crane 501, lift the old material gate 1 horizontally, use the wind rope to rotate the old material gate 1 around its own axis by a first angle, so that the projection of the rolling body 2 on the horizontal plane is outside the projection range of the track 3 on the horizontal plane, and then hang the old material gate 1 down to the ground, and the disassembly work is completed; it should be noted here that since the rolling body 2 is on the track 3 in the initial state, if the crane 501 is used to directly hang it down, the track 3 and the rolling body 2 will interfere with each other, so it is rotated by a first angle, which can be 30°, 60° or 90°, so that the track 3 is not directly under the rolling body 2, even if the projection of the rolling body 2 on the horizontal plane is outside the projection range of the track 3 on the horizontal plane, there will be no interference when the crane 501 drives the old material gate 1 to move to the ground.

[0029] S4: Use the crane 501 to hoist the new material gate 1 above the track 3, use the wind rope to rotate the new material gate 1 around its own axis until the rolling body 2 is opposite to the track 3, the crane 501 drives the new material gate 1 to move downward until the rolling body 2 is placed on the track 3, use the driving mechanism to drive the new material gate 1 to the working position, tighten the upper and lower connecting bolts of the new material gate 1, and the installation work is completed.

[0030] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A bellless blast furnace material gate disassembly and assembly structure, comprising a material gate (1), wherein the material gate (1) is provided with a lifting lug (6), characterized in that: Rolling bodies (2) are rotatably connected to the two sides of the material gate (1), and a track (3) used in conjunction with the rolling body (2) is arranged below the rolling body (2). The track (3) is mounted on a base (4), and a driving mechanism for driving the rolling body (2) to roll along the track (3) is arranged on the base (4). A mounting frame (5) is arranged at the end of the track (3), and the mounting frame (5) is fixed on the base (4). A crane (501) is arranged on the mounting frame (5).

2. The bellless blast furnace material gate disassembly and assembly structure according to claim 1, characterized in that: A limiting groove (301) is provided on the track (3), a rack (302) is provided at the bottom of the limiting groove (301), and the rolling body (2) comprises a traveling gear (201) used in conjunction with the rack (302).

3. The bellless blast furnace material gate disassembly and assembly structure according to claim 2, characterized in that: The rolling body (2) further comprises a roller (202) rotatably connected to the material gate (1); the axis of the roller (202) is perpendicular to the axis of the travel gear (201); and the roller (202) abuts against the side wall of the limiting groove (301).

4. The bellless blast furnace material gate disassembly and assembly structure according to claim 3, characterized in that: The driving mechanism comprises a servo motor (8), and an output end of the servo motor (8) is drivingly connected to a traveling gear (201).

5. The bellless blast furnace material gate disassembly and assembly structure according to claim 3, characterized in that: The driving mechanism comprises manual hoists (9) respectively arranged at two ends of the track (3), and the output end of the manual hoist (9) is detachably connected to the material gate (1).

6. The bellless blast furnace material gate disassembly and assembly structure according to claim 1, characterized in that: An expansion joint (7) is provided below the material gate (1).

Images