Blast furnace air supply small sleeve replacing device

Abstract

The utility model provides a blast furnace air supply small sleeve replacing device which is characterized in that one end of an oil cylinder of the replacing device is fixedly connected with a fork joint sleeve, the other end of the oil cylinder is fixedly connected with a sleeve hook, a connecting rod of the sleeve hook is further provided with a groove, and a shear fork plate is arranged in the groove in the connecting rod of the sleeve hook; through the structural form that the scissor plate and the sleeve hook of the replacing device are connected together in an overlapped mode through the hydraulic oil cylinder, the scissor plate and the sleeve hook form a scissor form in the small air supply sleeve to lock the small air supply sleeve in an expanding mode, and the replacing device clamping the small air supply sleeve in an expanding mode is rapidly and safely moved out of the blast furnace. The size of the replacement device in the small air supply sleeve is changed, the small air supply sleeve is effectively prevented from being damaged due to the fact that part of the replacement device is too large in size in the disassembly and assembly process, the small air supply sleeve can be conveniently and rapidly disassembled, assembled and carried away, and therefore the replacement time is greatly shortened, the replacement efficiency is improved, and the replacement cost is reduced. And the labor intensity of maintenance personnel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace maintenance equipment, in particular to a device for replacing a small blast furnace tuyere sleeve. Background Art

[0002] Blast furnace ironmaking is a continuous production process. As a key component on the blast furnace air supply pipeline, the device for replacing the small blast furnace tuyere sleeve works in a production environment of high temperature and high pressure. During use, due to the influence of high temperature and iron slag in the furnace, it is extremely easy to cause the mating surface of the small sleeve to be uneven due to burning and other reasons, resulting in air leakage at the tuyere, uneven heating in the blast furnace, and thus affecting the quality and output of blast furnace production.

[0003] At present, most of the domestic devices for replacing the small blast furnace tuyere sleeve use chain hoists for hoisting and are replaced manually. Due to the large weight of the small blast furnace tuyere sleeve, during the replacement process, workers need to pull the device for replacing the small blast furnace tuyere sleeve from the large sleeve to the installation position in sequence and then disassemble and assemble it. Therefore, the labor intensity of workers is very high, the maintenance time is very long, and there are also potential safety hazards such as the breakage of the chain hoist or rope during the use of the chain hoist for hoisting. Summary of the Utility Model

[0004] In order to solve the defects existing in the process of replacing the device for replacing the small blast furnace tuyere sleeve in the prior art, the utility model designs a device for replacing the small blast furnace tuyere sleeve controlled by a hydraulic cylinder. The device uses a hydraulic control scissor plate and a sleeve hook to lock the small blast furnace tuyere sleeve, disassembles the small blast furnace tuyere sleeve through a tuyere replacement machine, and transports it to a safe position.

[0005] A device for replacing a small blast furnace tuyere sleeve of the utility model includes an oil cylinder and a piston arranged in the oil cylinder. It is characterized in that one end of the oil cylinder is fixedly connected with a fork joint sleeve, and the other end is fixedly connected with a sleeve hook. At the rear end of the connecting rod of the sleeve hook, the scissor plate and the sleeve hook are overlapped and connected together through a pin shaft; a groove is arranged on the connecting rod of the sleeve hook, and the scissor plate is placed in the groove on the connecting rod of the sleeve hook; wherein, the piston in the oil cylinder is connected with a piston joint, the piston joint is connected with a connecting rod piston, one end of the movable connecting rod is connected with the connecting rod piston through a connecting rod pin shaft, and the other end is connected to the scissor plate through the connecting rod pin shaft.

[0006] The utility model is further characterized in that when the movable connecting rod is connected with the scissor plate through the connecting rod pin shaft, the connecting point of the connecting rod pin shaft on the scissor plate is located about 38 - 42 0 at a position below the center line of the pin shaft, and the distance from the center L of the pin shaft is about 45 - 55 mm.

[0007] A further feature of the present utility model is that a right-angle hook is provided at the front end of the connecting rod of the socket hook. The other end of the connecting rod is arranged in the oil cylinder 1 and is fixedly connected to the fork joint sleeve through the piston joint; the fork joint sleeve will be connected to the tuyere changer outside the blast furnace.

[0008] The blast furnace tuyere sleeve replacement device of the present utility model has a structure in which the shear fork plate and the socket hook are overlapped and connected by a hydraulic cylinder, which changes the volume of the replacement device in the tuyere sleeve, effectively avoiding damage to the tuyere sleeve caused by the excessive volume of part of the replacement device during disassembly and assembly. The present utility model can conveniently and quickly disassemble, assemble and transport the blast furnace tuyere sleeve, thereby greatly improving the replacement efficiency of the tuyere sleeve, reducing the labor intensity of maintenance personnel, and ensuring the safe construction of the replacement device. The present utility model is the most convenient and effective tool for quickly replacing the blast furnace tuyere sleeve, has good practicability and feasibility, and has a good prospect of wide promotion and application. Brief Description of the Drawings

[0009] Figure 1 It is a schematic assembly structure diagram of the replacement device;

[0010] Figure 2 It is a schematic structure diagram of the shear fork plate 7 in the groove of the socket hook 8;

[0011] Figure 3 It is a schematic position diagram when the movable connecting rod 5 is connected to the shear fork plate 7.

[0012] The numbers in the figure are: oil cylinder 1; piston 2; piston joint 3; connecting rod piston 4; movable connecting rod 5; pin shaft 6; shear fork plate 7; socket hook 8; tuyere sleeve 9; connecting rod pin shaft 10; fork joint sleeve 11. Detailed Description of the Preferred Embodiment

[0013] The following will refer to the attached Figures 1 to 3 and exemplary embodiments to describe the present utility model in detail. What is shown in the drawings is the preferred embodiment. Some components may not be shown when they are clearly described, and some figures may be enlarged, but these preferred embodiments do not limit other embodiments of the present utility model.

[0014] The design of overlapping and connecting the shear fork plate and the socket hook of the blast furnace tuyere sleeve replacement device of the present utility model changes the volume of the blast furnace tuyere sleeve replacement device entering the tuyere sleeve during maintenance, and avoids damage to the tuyere sleeve caused by the excessive volume of the disassembly and assembly rod seat part during disassembly and assembly. The present utility model is convenient and fast to enter and exit the blast furnace tuyere sleeve, improving the replacement efficiency of the tuyere sleeve

[0015] Refer to Figure 1 and Figure 2, the structure of the utility model includes an oil cylinder 1 and a piston 2 arranged in the oil cylinder 1. One end of the oil cylinder 1 is fixedly connected to a fork joint sleeve 11 through a piston joint 3, and the other end of the oil cylinder 1 is fixedly connected to the rear end of the connecting rod of the hook 8. At the rear end of the connecting rod of the hook 8, a shear fork plate 7 and the hook 8 are overlapped and connected together through a pin shaft 6. A groove for placing the shear fork plate 7 is designed on the connecting rod of the hook 8, and the shear fork plate 7 can rotate and move in its groove. When entering the small air supply sleeve 9, the shear fork plate 7 is placed in the groove of the hook 8, so that the volume of the replacement device becomes smaller and the moving space becomes larger when entering the small air supply sleeve 9, and the inner wall of the small air supply sleeve 9 will not be damaged due to the hook 8 hitting it. Both ends of the piston 2 in the oil cylinder 1 of the utility model are connected with piston joints 3. One end piston joint 3 is fixedly connected to the fork joint sleeve 11, and the other end piston joint 3 is connected to the connecting rod piston 4. One end of the movable connecting rod 5 is connected to the connecting rod piston 4 through a connecting rod pin shaft 10, and the other end is connected to the shear fork plate 7 through the connecting rod pin shaft 10.

[0016] Refer to Figure 3 , when the movable connecting rod 5 of the utility model is connected to the shear fork plate 7 through the connecting rod pin shaft 10, the connection point of the connecting rod pin shaft 10 on the shear fork plate 7 and the pin shaft 6 of the shear fork plate 7 are not on the same center line. The connection point of the connecting rod pin shaft 10 on the shear fork plate 7 is located about 38 - 42 0 at the lower left of the center line of the pin shaft 6, and the distance L from the center of the pin shaft 6 is about 45 - 55mm. The design of this novel structure can make the shear fork plate 7 form a shear fork type to tighten the small air supply sleeve with the hook 8 when working, prevent the hook 8 from falling off, and can also make the shear fork plate 7 conveniently return to the groove of the hook 8 after disassembly, making the volume of the replacement device smaller.

[0017] Refer to Figure 1 and Figure 2 , the front end of the connecting rod of the hook 8 of the utility model is set as a right-angle hook. When replacing the small air supply sleeve 9, when the replacement device enters the small air supply sleeve 9 and the right-angle hook of its hook 8 extends out of the small air supply sleeve 9, the replacement device is lifted by a tuyere replacement machine or a forklift connected outside the blast furnace, so that the right-angle hook at the front end of the hook 8 hooks and clings to the front end of the small air supply sleeve 9, and it is disassembled from the blast furnace through the tuyere replacement machine. At this time, control the piston 2 and the piston joint 3 in the oil cylinder 1 to push the connecting rod piston 4 and the movable connecting rod 5 to move backward, and the movable connecting rod 5 pushes the shear fork plate 7 to rotate downward through the connecting rod pin shaft 10 connected to the shear fork plate 7 until it touches the inner wall of the small air supply sleeve 9 downward and forms a shear fork form with the hook 8 to tighten and lock the small air supply sleeve 9 together. Then, under the dragging of the tuyere replacement machine or the forklift outside the blast furnace, the replacement device clamping the small air supply sleeve 9 is quickly and safely removed from the blast furnace.

[0018] The fork joint sleeve 11 connected to one end of the oil cylinder 1 of the present utility model will be connected to the tuyere changer or forklift outside the blast furnace, and the blast furnace tuyere small sleeve replacement device for removal or installation will be sent into or out of the blast furnace tuyere.

[0019] The present utility model uses the same method to tension and lock the new tuyere small sleeve 9 on the replacement device and safely send it into the blast furnace tuyere for installation through the tuyere changer or forklift. Control the piston 2, piston joint 3 and connecting rod piston 4 in the oil cylinder 1 to push forward or retract. The movable connecting rod 5 drives the shear fork plate 7 to rotate upward around the connecting pin shaft 10 until the shear fork plate 7 is placed back into the groove of the socket hook 8, and then use the front end of the socket hook 8 to push the rear end face of the tuyere small sleeve 9 to make the tuyere small sleeve 9 closely fit with the blast furnace wall. After the installation is completed, the replacement device is removed from the blast furnace through the tuyere changer or forklift.

[0020] Embodiment 1

[0021] Refer to the appendix Figures 1 - 3 In this embodiment, the blast furnace tuyere small sleeve replacement device is sent into the tuyere small sleeve to remove the tuyere small sleeve 9 from the blast furnace. At this time, the piston 2, piston joint 3 and connecting rod piston 4 in the replacement device oil cylinder 1 are pushed forward and retracted, and the shear fork plates 7 are overlapped and placed in the groove of the socket hook 8. The replacement device is continuously sent into the tuyere small sleeve 9 until the right-angle hook of the socket hook 8 of the replacement device extends out of the tuyere small sleeve 9. Lift the replacement device through the tuyere changer, and the right-angle hook of the socket hook 8 hooks the front end of the tuyere small sleeve 9 and hooks it out from the blast furnace wall. At this time, control the piston 2, piston joint 3 and connecting rod piston 4 in the oil cylinder 1 to pull the movable connecting rod 5 downward and pull the shear fork plate 7 to rotate downward around the connecting rod pin shaft 10 until it contacts the inner wall of the tuyere small sleeve 9 downward and forms a shear fork form with the socket hook 8. The shear fork plate 7 and the socket hook 8 together tighten and lock the tuyere small sleeve 9, and under the dragging of the tuyere changer, the replacement device holds the tightened tuyere small sleeve 9 and quickly and safely removes it from the blast furnace.

[0022] Embodiment 2

[0023] Refer to the appendix Figures 1 - 3 In this embodiment, the repaired tuyere small sleeve 9 is sent into the blast furnace for installation. Using the same method, the new tuyere small sleeve 9 is tensioned and locked on the replacement device and safely sent into the blast furnace through the forklift. After the tuyere small sleeve 9 is installed in the appropriate position on the blast furnace wall, control the piston 2, piston joint 3 and connecting rod piston 4 in the oil cylinder 1 to push forward and retract. The movable connecting rod 5 drives the shear fork plate 7 to rotate upward around the connecting pin shaft 10 until the shear fork plate 7 is placed back into the groove of the socket hook 8, and then use the front end of the socket hook 8 to impact the rear end face of the tuyere small sleeve 9 to make the tuyere small sleeve 9 closely fit with the blast furnace wall, and then drag the replacement device out of the blast furnace through the forklift.

[0024] The above embodiments of the present utility model are merely exemplary. Without departing from the design principle of the present utility model, various changes made to the embodiments will be considered to be within the protection scope of the present utility model.

Claims

1. A replacement device for the small tuyere sleeve of a blast furnace, comprising an oil cylinder and a piston arranged in the oil cylinder, characterized in that, One end of the oil cylinder is fixedly connected with a fork joint sleeve, and the other end is fixedly connected with a hook. At the rear end of the connecting rod of the hook, a shear fork plate and the hook are overlapped and connected together through a pin shaft; a groove is arranged on the connecting rod of the hook, and the shear fork plate is placed in the groove on the connecting rod of the hook; Wherein, a piston joint is connected to the piston in the oil cylinder, the piston joint is connected with a connecting rod piston, one end of the movable connecting rod is connected with the connecting rod piston through a connecting rod pin shaft, and the other end is connected to the shear fork plate through the connecting rod pin shaft.

2. The replacement device according to claim 1, wherein A right-angle hook is arranged at the front end of the connecting rod of the hook.

3. The replacement device according to claim 1, characterized in that, The other end arranged in the oil cylinder is fixedly connected with the fork joint sleeve through the piston joint.

4. The replacement device according to claim 3, wherein The fork joint sleeve will be connected with the tuyere changer outside the blast furnace.

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