Blast furnace air supply medium sleeve replacement device

Abstract

The utility model discloses a blast furnace air supply medium sleeve replacing device which is composed of a control oil cylinder, a disassembly and assembly support, a piston push rod, a plurality of opening and closing connecting rods, a plurality of pull claw arms, a plurality of pull claw arm supports and the like. In the process of disassembling and assembling the air supply middle sleeve, the opening and closing connecting rod is driven by controlling the oil cylinder and the piston push rod, so that the pull claw arms rotate around the fulcrums of the pull claw arms and extend out or retract, and the pull claw arms are driven to be fully opened or tightened and are hooked on the outer edge of the front end of the air supply middle sleeve during disassembling; dragging out or feeding the replacement device into a blast furnace air supply outlet through a blast furnace air supply replacement machine to complete the disassembly or assembly of the air supply middle sleeve; the device can be used for quickly dismounting and transporting the blast furnace air supply medium sleeve, greatly shortens the maintenance time, improves the maintenance efficiency, ensures the construction safety, reduces the labor intensity of maintenance personnel, is a convenient and effective tool for realizing quick replacement of the blast furnace air supply medium sleeve, and is worthy of popularization and application. The method has good practicability and feasibility and good prospects of wide popularization and application.

Description

Technical Field

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

[0002] The blast furnace tuyere is a key component in blast furnace production, including the connection of the tuyere outer sleeve and the support for the tuyere medium sleeve and the tuyere small sleeve to ensure the normal operation of the tuyere medium sleeve and the tuyere small sleeve in a high-temperature and high-pressure environment. Since part of the tuyere medium sleeve directly enters the hearth, the working environment is relatively harsh, so the damage rate is relatively high. When the tuyere medium sleeve in blast furnace blowing is damaged by burning, leaking water or reaches its service life cycle, how to replace it effectively, quickly and safely will directly affect the continuity of blast furnace production and economic benefits. And how to shorten the replacement time, reduce the labor intensity and improve the replacement efficiency during the replacement process is an effective means to improve the blast furnace production efficiency.

[0003] At present, when replacing the tuyere medium sleeve in blast furnaces in China, most of them use manual chain hoist lifting for replacement, and some also use auxiliary tools such as steel drills and sledgehammers for disassembling the tuyere medium sleeve. Since the weight of the tuyere medium sleeve in blast furnace blowing is very large, during the replacement process, workers need to pull the tuyere medium sleeve out of the outer sleeve through a chain hoist, or use a steel drill or a sledgehammer to vibrate and disassemble it. Therefore, the labor environment is relatively poor, the labor intensity of workers is very high, the maintenance time is also very long, and there is also a safety hazard of chain hoist or rope breakage when using a chain hoist for lifting. These factors will directly affect the normal production of the blast furnace. Therefore, it is urgent to design a more convenient and safe replacement device for the tuyere medium sleeve in blast furnace blowing. Summary of the Utility Model

[0004] In order to solve the defects existing in the replacement process of the existing replacement device for the tuyere medium sleeve in blast furnaces, the utility model provides a replacement device for the tuyere medium sleeve with a completely new design to overcome the deficiencies existing in the prior art.

[0005] The utility model is a replacement device for the tuyere medium sleeve in blast furnace blowing, including a control oil cylinder 2, and is characterized by including a flange support 1, a disassembly and assembly support 3, a piston push rod 5, a plurality of opening and closing connecting rods 6, a plurality of claw arms 7, and a plurality of claw arm supports 8; the piston of the control oil cylinder 2 is connected with the piston push rod 5, the control oil cylinder 2 and the piston push rod 5 are arranged in the disassembly and assembly support 3, the claw arm supports 8 are arranged on the circumference at one end of the disassembly and assembly support 3, and the claw arms 7 are connected to the claw arm supports 8; the piston push rod 5 and the claw arms 7 are connected together through the opening and closing connecting rods 6; the other end of the disassembly and assembly support 3 is connected with the flange support 1.

[0006] The feature of the present utility model also lies in that the front end of the claw arm 7 is designed in a right-angle structure. When disassembling and assembling, the right-angle barb at the front end of the claw arm 7 faces the front end face of the air supply middle sleeve. The taper at the protruding part at the rear end of the claw arm 7 is adapted to the taper of the inner wall of the air supply middle sleeve.

[0007] A further feature of the present utility model is that the front end of the piston push rod 5 is designed in the shape of a plum blossom petal structure. One end of the several opening and closing connecting rods 6 is installed on the plum blossom petal structure at the front end of the piston push rod 5 through a movable pin shaft, and the other end is installed on both sides of the several claw arms 7 through a movable pin shaft. There are 6 of the several opening and closing connecting rods 6, and the plum blossom petal structure of the piston push rod 5 is a flat-open three-plum blossom petal structure shape for installing the 6 opening and closing connecting rods 6.

[0008] On the circumference of the disassembly and assembly support 3 of the present utility model, 3 claw arm supports 8 are fixedly installed and connected to the 3 claw arms 7 through movable pin shafts. On the circumference of the disassembly and assembly support 3, several positioning top plates 4 with a nearly right-angle structure are also installed, which hold against the outer edge of the large air supply sleeve when disassembling and assembling the air supply middle sleeve, leveraging and stabilizing the large air supply sleeve and the replacement device.

[0009] The claw arm support 8 of the present utility model is also installed on the support 9 at the same time. The flange support 1 is connected to the blast furnace air supply replacement machine.

[0010] The blast furnace air supply middle sleeve replacement device of the present utility model, by using opening and closing connecting rods to connect the claw arms and the piston push rod, and controlling the oil cylinder to push the piston push rod to rotate so that the claw arms can flexibly extend and retract, can quickly disassemble, assemble and transport away the blast furnace air supply middle sleeve, thereby greatly shortening the maintenance time, improving the maintenance efficiency, reducing the labor intensity of maintenance personnel, and ensuring the safety of maintenance construction. The present utility model is a convenient and effective tool for realizing the quick replacement of the blast furnace air supply middle sleeve, and has good practicability and feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the front view structural schematic diagram of the air supply middle sleeve replacement device of the present utility model;

[0012] Figure 2 It is the right view structural schematic diagram of the air supply middle sleeve replacement device of the present utility model;

[0013] Among them, the serial numbers are: flange support 1; control oil cylinder 2; disassembly and assembly support 3; positioning top plate 4; piston push rod 5; opening and closing connecting rod 6; claw arm 7; claw arm support 8; support 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0014] The present utility model will be described in detail below with reference to the accompanying drawings and exemplary embodiments. The figures shown are preferred embodiments. 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.

[0015] Referring to Figure 1 and Figure 2 As shown, the present utility model is designed as a new type of replacement device for the tuyere intermediate casing of a blast furnace, including a flange support 1, a control oil cylinder 2, a disassembly and assembly support 3, a plurality of positioning top plates 4, a piston push rod 5, a plurality of opening and closing connecting rods 6, a plurality of claw arms 7, a plurality of claw arm supports 8, and a bracket 9 for supporting the claw arm support 8.

[0016] The structural connection and working state of the replacement device of the present utility model are as follows: The piston of the control oil cylinder 2 is connected with the piston push rod 5. The control oil cylinder 2 and the piston push rod 5 are arranged in the disassembly and assembly support 3, and one end of the piston push rod 5 extends out of the control oil cylinder 2; The disassembly and assembly support 3 serves as the overall support of the entire structure. A claw arm support 8 and a bracket 9 for supporting the claw arm support 8 are installed on the circumference at one end of the disassembly and assembly support 3, and the claw arm 7 is connected to the claw arm support 8; One end of the opening and closing connecting rod 6 is connected to the piston push rod 5, and the other end is connected to both sides of the claw arm 7, connecting the piston push rod 5 and the claw arm 7 together; The other end of the disassembly and assembly support 3 is connected to the flange support 1, and the flange support 1 is connected to the connecting sleeve at the front end of the blast furnace tuyere replacement machine, and the replacement device is transported into the blast furnace tuyere to disassemble and install the tuyere intermediate casing.

[0017] When the replacement device enters the tuyere intermediate casing, the control oil cylinder 2 pushes the piston push rod 5 forward. Through the rotation or turning of the opening and closing connecting rod 6, the three claw arms 7 contract together and extend out of the front end of the tuyere intermediate casing; At this time, the control oil cylinder 2 pulls back the piston push rod 5 backward. Through the turning of the opening and closing connecting rod 6, the three claw arms 7 are all opened and retracted backward. The right-angle barb at the front end of the claw arm 7 faces the front end face of the tuyere intermediate casing, and the taper of the protruding part at the rear end of the claw arm 7 is consistent with the taper of the inner wall of the tuyere intermediate casing. When the right angle at the front end of the claw arm 7 closely adheres to the front end face of the tuyere intermediate casing, the rear end of the claw arm 7 also adheres to the inner wall of the tuyere intermediate casing and clamps the tuyere intermediate casing at the same time. Under the vibration and dragging of the blast furnace tuyere replacement machine, the tuyere intermediate casing is disassembled, and then the replacement device holding the tuyere intermediate casing is transported out of the blast furnace tuyere by the blast furnace tuyere replacement machine.

[0018] As Figure 2 shown, the front end of the piston push rod 5 of the present utility model is designed in the shape of a flat-opening three-petal plum blossom structure. One end of the opening and closing connecting rod 6 is installed on the three petals of the plum blossom structure through a movable pin shaft, and the other end is installed on both sides of the claw arm 7 through a movable pin shaft. Through the rotation and pulling of the opening and closing connecting rod 6, the opening and closing of the claw arm 7 are flexible and convenient.

[0019] The utility model also has a plurality of large sleeve positioning top plates 4 with nearly right-angle structures installed on the circumference of the disassembly support 3. When the air supply middle sleeve is disassembled, the positioning top plates 4 can be used to support the outer edge of the large air supply sleeve, which can both leverage and stabilize the large air supply sleeve and the replacement device.

[0020] In the specific implementation of the utility model, three claw arm supports 8, three claw arms 7, and six opening and closing connecting rods 6 are fixedly installed on the circumference of the disassembly support 3, and the connections between these components and the piston push rod 5 can be movably connected through a movable pin. An annular support bracket 9 is also fixedly installed on the circumference of the disassembly support 3, and the claw arm support 8 is firmly installed on the disassembly support 3 and the bracket 9 at the same time.

[0021] The utility model can also be applied to large, medium and small sleeves of blast furnace tuyere, and the structures such as the claw arm 7, the claw arm support 8 and the opening and closing connecting rod 6 can be set to 2 or 1 according to the size of the large, medium and small sleeves or the actual application situation.

[0022] Example 1

[0023] Reference Figure 1 and Figure 2 When the utility model is disassembling the air supply sleeve, the hydraulic control cylinder 2 directly pushes the piston push rod 5 to extend and retract. The extension and retraction of the piston push rod 5 pulls the opening and closing connecting rod 6 to rotate and tighten or open the claw arm 7. The length of the claw arm 7 is designed according to the length of the air outlet sleeve, and the front end of the claw arm 7 is designed as a right-angle structure. During the process of disassembling and assembling the air supply middle sleeve, when the control cylinder 2 is extended, the piston push rod 5 is extended to push the opening and closing connecting rod 6 to rotate so that the claw arm 7 is retracted and tightened, and the front end of the claw arm 7 can pass through the front end of the air supply middle sleeve; after passing through the air supply middle sleeve, the control cylinder 2 is retracted with the piston push rod 5. At this time, the opening and closing connecting rod 6 rotates to pull the claw arm 7 to make the claw fully open, and the claw of the claw arm 7 is retracted and hooked on the front end outer edge of the air supply middle sleeve, while the rear end of the claw arm 7 is also attached to the inner wall of the air supply middle sleeve and clamps the air supply middle sleeve at the same time. Under the vibration and dragging of the blast furnace air supply replacement machine, the air supply middle sleeve is disassembled, and then the replacement device holding the air supply middle sleeve is transported out of the blast furnace tuyere through the blast furnace air supply replacement machine.

[0024] During the disassembly process, the large sleeve positioning top plate 4 installed in the middle of the disassembly support 3 can also be used to clamp the rear end face of the large air supply sleeve, so that the disassembly process can leverage and stabilize the large air supply sleeve and the replacement device, making the disassembly of the middle air supply sleeve stable and easy.

[0025] Example 2

[0026] In this embodiment, the work of replacing the installation of the middle air supply sleeve is carried out. First, the flange support 1 of the replacement device is connected to the connecting sleeve at the front end of the blast furnace air supply replacement machine. The hydraulic system controls the oil cylinder 2 to push the piston push rod 5 to extend and drive the opening and closing connecting rod 6 to rotate, so that the claw arm 7 retracts and tightens and passes through the front end of the middle air supply sleeve. Then, the control oil cylinder 2 retracts the piston push rod 5, and the opening and closing connecting rod 6 pulls the claw arm 7 to fully open the claws. The claws of the claw arm 7 retract and hook tightly on the outer edge of the front end of the middle air supply sleeve. The rear end of the claw arm 7 is attached to the inner wall of the middle air supply sleeve and simultaneously clamps the middle air supply sleeve tightly. Then, the blast furnace air supply replacement machine pushes the clamping middle air supply sleeve replacement device and sends it into the blast furnace tuyere until the installation position of the middle air supply sleeve. The hydraulic system controls the piston push rod 5 of the oil cylinder 2 to extend and drive the opening and closing connecting rod 6 to rotate to make the claw arm 7 retract and tighten. The blast furnace air supply replacement machine is started to pull the replacement device out of the middle air supply sleeve. The claw arm 7 of the replacement device is used to push the middle air supply sleeve tightly in the installation position and install it. Finally, the blast furnace air supply replacement machine transports the replacement device out of the blast furnace tuyere.

[0027] The basic principle, main features and advantages of the present utility model have been described above through the drawings and text. Those skilled in the art should understand that various changes can be made to these embodiments without departing from the design principle of the present utility model, and these changes will also be within the scope of the claims of the present utility model.

Claims

1. A replacement device for the tuyere sleeve in blast furnace blowing, comprising a control oil cylinder (2), characterized in that, It comprises a flange support (1), a disassembly support (3), a piston push rod (5), a plurality of opening and closing connecting rods (6), a plurality of claw arms (7), and a plurality of claw arm supports (8); the piston of the control oil cylinder (2) is connected to the piston push rod (5), the control oil cylinder (2) and the piston push rod (5) are arranged in the disassembly support (3), the claw arm support (8) is arranged on the circumference of one end of the disassembly support (3), and the claw arm (7) is connected to the claw arm support (8); the piston push rod (5) and the claw arm (7) are connected together through the opening and closing connecting rod (6); the other end of the disassembly support (3) is connected to the flange support (1).

2. The replacement device according to claim 1, wherein The front end of the pull claw arm (7) is designed as a right-angle structure, and the right-angle barb at the front end of the pull claw arm (7) faces the front end surface of the air supply sleeve during disassembly and assembly.

3. The replacement device according to claim 2, characterized in that, The taper of the protrusion at the rear end of the claw arm (7) is adapted to the taper of the inner wall of the air supply middle sleeve.

4. The replacement device according to claim 1, wherein The front end of the piston push rod (5) is designed to be in the shape of a plum petal structure, one end of the plurality of opening and closing connecting rods (6) is mounted on the plum petal structure at the front end of the piston push rod (5) via a movable pin, and the other end is mounted on both sides of the plurality of pulling claw arms (7) via a movable pin.

5. The replacement device according to claim 4, characterized in that, Six of the plurality of opening and closing connecting rods (6) are provided, and the plum blossom petal structure of the piston push rod (5) is in the shape of a flat-open plum blossom with three petals, and is used to install the six opening and closing connecting rods (6).

6. The replacement device according to claim 1, characterized in that Three claw arm supports (8) are fixedly mounted on the circumference of the disassembly and assembly support (3), and are connected to the three claw arms (7) via a movable pin shaft.

7. The replacement device according to claim 6, characterized in that, A plurality of positioning top plates (4) with nearly right-angle structures are also installed on the circumference of the disassembly and assembly support (3), which support the outer edge of the large air supply sleeve when the middle air supply sleeve is disassembled and assembled, thereby leveraging and stabilizing the large air supply sleeve and the replacement device.

8. The replacement device according to claim 6, wherein The claw arm support (8) is also installed on the bracket (9).

9. The replacement device according to claim 1, wherein The flange support (1) is connected to a blast furnace air supply replacement machine.

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