Metal pipe for repairing damage of cooling wall of blast furnace

Abstract

The utility model relates to the technical field of cooling wall repair, and discloses a metal pipe for blast furnace cooling wall damage repair, which comprises an annular corrugated pipe and a joint body, a traction connecting pipe is arranged on the right side of the annular corrugated pipe, the traction connecting pipe and the annular corrugated pipe are integrally formed, the traction connecting pipe is matched with a supporting assembly, and the supporting assembly is arranged on the annular corrugated pipe. A connecting pipe is arranged on the right side of the interior of the connector body, the connecting pipe is fixedly connected with the connector body, the annular corrugated pipe is pulled out of a cooling wall water pipe, the connecting position of a metal hose is cut off by pulling out the annular corrugated pipe by a proper length distance, and the annular corrugated pipe penetrates through the connector body and penetrates into the connecting pipe; the annular corrugated pipe penetrates into the damaged water pipe of the cooling wall, and the joint body, the connecting pipe, the clamping ring, the plug and the like are adopted for sealing, so that cooling water is prevented from leaking into the furnace, gas in the furnace is prevented from leaking, the cooling function of the damaged cooling wall can be recovered, the service life of the cooling wall is prolonged, and long-term stable and smooth operation of the blast furnace is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling wall repair, and more specifically discloses a metal pipe for repairing a damaged cooling wall of a blast furnace. Background Art

[0002] The cooling wall is the main structural part of the cooling blast furnace body. Its structural integrity and deformation degree are directly related to the stable and smooth operation of the blast furnace. The main casting material of the cooling wall of Zhanjiang Iron and Steel Blast Furnace is QT400-18; the cooling water pipe inside the cooling wall is made of 10# steel, the outer diameter of the cooling pipe is φ70mm, and the wall thickness is 7mm; ④ The protective pipe outside the water pipe is 20#, the outer diameter of the pipe is φ95mm, and the wall thickness is 6mm; ⑤ The refractory brick is a cold-set brick, made of silicon nitride combined with silicon carbide bricks. The main function of the cooling wall is to protect the furnace shell, that is, under the conditions of cooling and heat transfer, to ensure that a barrier formed by the cooling wall and slag skin is formed in front of the furnace shell to avoid direct contact between coal gas, furnace charge, molten iron and the furnace shell, reduce the furnace shell temperature, and ensure that the furnace shell steel plate does not deform or crack within the temperature range of normal thermal stress.

[0003] In general industrial design, the cooling wall within the life of a generation of furnace cannot be replaced. Because replacing the cooling wall requires a long wind-down time, it will cause a large loss of production. However, due to the high heat load of the cooling wall, the cooling wall is often deformed by heat, which leads to the rupture of its internal water pipes. After the internal pipes of the cooling wall are broken and burned, the water supply needs to be stopped to prevent the cooling water from leaking into the furnace. However, stopping the water supply will cause the cooling wall to lose its cooling effect and accelerate the damage of the cooling wall. And directly lead to the increase of the furnace skin temperature. If the cooling wall is damaged and no measures are taken, then within the effective cooling area, the heat transferred out will be reduced, local boiling will occur, and even the temperature of some cooling wall surfaces will instantly reach 600-700℃, burning the adjacent water pipes. Utility Model Content

[0004] The utility model provides a metal pipe for repairing a damaged cooling wall of a blast furnace, which can solve the problems raised in the above-mentioned background technology.

[0005] To solve the above technical problems, according to one aspect of the utility model, more specifically, a metal pipe for repairing a damaged blast furnace cooling wall comprises an annular bellows and a joint body, a traction pipe is arranged on the right side of the annular bellows, the traction pipe is integrally formed with the annular bellows, the traction pipe is adapted to be equipped with a support assembly, a connecting pipe is arranged on the right side inside the joint body, the connecting pipe is fixedly connected to the joint body, the annular bellows is pulled out from the cooling wall water pipe, the metal hose connection is cut off by pulling out the annular bellows to an appropriate length, the annular bellows passes through the joint body and penetrates into the interior of the connecting pipe, a metal gasket No. 1 is arranged on the right side of the inner side wall of the connecting pipe, the metal gasket No. 1 is fixedly connected to the connecting pipe, a clamp is fixedly connected to the right side of the outer side of the connecting pipe, a plug is installed inside the clamp, and a metal gasket No. 2 is fixedly connected to the left side of the inner side wall of the plug.

[0006] Furthermore, the support assembly includes a traction joint, a connecting ring and a flexible sheet. The outside of the traction joint has an external thread. The right side of the traction joint is fixedly connected to the connecting ring. The flexible sheet is pasted and fixed to the left side of the inside of the connecting ring. There are three flexible sheets.

[0007] Furthermore, the inner side wall of the traction connecting pipe has an internal thread, and the internal thread is matched with the external thread on the traction connecting joint.

[0008] Furthermore, a metal hook is inserted into the connecting ring, the metal hook is detachably connected to the connecting ring, and a steel wire rope is fixedly connected to the right side of the metal hook.

[0009] Furthermore, a hole is integrally formed on the outside of the joint body, and a filler is pressed into the hole to seal the gap between the annular corrugated pipe and the joint body and the connecting pipe.

[0010] The beneficial effects of the metal pipe for repairing the damaged cooling wall of a blast furnace of the utility model are as follows:

[0011] In the utility model, an annular corrugated pipe is inserted into the damaged water pipe of the cooling wall, and a joint body, a connecting pipe, a clamping ring, a plug and the like are used for sealing, so as to prevent cooling water from leaking into the interior of the furnace and to prevent coal gas in the furnace from leaking out. The cooling function of the damaged cooling wall can be restored, the service life of the cooling wall can be extended, and the long-term stable and smooth operation of the blast furnace can be ensured.

[0012] In the utility model, a connecting ring is arranged on the side of the traction joint, the interior of the connecting ring is empty, a flexible sheet is pasted on the left side of the connecting ring, the outside of the flexible sheet contacts the connecting ring, but only the left side of the flexible sheet and the connecting ring are fixed together, the metal hook is hooked in the connecting ring, the flexible sheet is squeezed and deformed, the metal hook is not easy to fall off in the connecting ring, the connection is stable, and it can prevent the wire rope from loosening and falling off when the traction connecting pipe is pulled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the utility model;

[0016] Figure 3 For this utility model Figure 1 Schematic diagram of the partial top view structure.

[0017] In the figure: 1. annular corrugated pipe; 2. traction connecting pipe; 3. traction joint; 4. joint body; 5. hole; 6. connecting pipe; 7. clamping ring; 8. plug; 9. metal gasket No. 1; 10. metal gasket No. 2; 11. connecting ring; 12. metal hook; 13. wire rope; 14. flexible sheet; 15. support assembly; 16. external thread; 17. internal thread. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0019] According to the attached Figure 1-3 , a metal pipe for repairing a damaged cooling wall of a blast furnace is provided, comprising an annular bellows 1 and a joint body 4, a traction pipe 2 is arranged on the right side of the annular bellows 1, the traction pipe 2 is integrally formed with the annular bellows 1, the traction pipe 2 is adapted to be equipped with a support assembly 15, a connecting pipe 6 is arranged on the right side inside the joint body 4, the connecting pipe 6 is fixedly connected to the joint body 4, the annular bellows 1 is pulled out from the cooling wall water pipe, the metal hose connection is cut off after being pulled out to an appropriate length, the annular bellows 1 passes through the joint body 4 and penetrates into the interior of the connecting pipe 6, a metal gasket No. 1 9 is arranged on the right side of the inner side wall of the connecting pipe 6, the metal gasket No. 1 9 is fixedly connected to the connecting pipe 6, a clamp 7 is fixedly connected to the outer right side of the connecting pipe 6, a plug 8 is installed inside the clamp 7, and a metal gasket No. 2 10 is fixedly connected to the left side of the inner side wall of the plug 8. The designed repair pipe not only plays an important role in sealing water and gas in this technology, but its basic type is also very valuable for promotion in other occasions involving the connection of corrugated hoses and metal hard pipes, especially those with certain sealing requirements and the transmission medium has a certain pressure. Its promotion value cannot be underestimated when used with the national standard reducer. Since the use of this technology, it has been used continuously for nearly half a year. At present, the cooling wall is in good condition, ensuring the long-term stable and smooth operation of the blast furnace, which is of great significance for promotion in the same industry.

[0020] The annular corrugated tube 1 can be reliably compressed by a clamping ring due to the parallel grooves; one end of the hose is provided with a traction tube 2 welded to the hose, which is connected to the traction joint 3 by a thread, and will not come loose, thereby greatly improving reliability.

[0021] In this embodiment, the support assembly 15 includes a traction joint 3, a connecting ring 11 and a flexible sheet 14. The outside of the traction joint 3 has an external thread 16. The right side of the traction joint 3 is fixedly connected to the connecting ring 11. The flexible sheet 14 is pasted and fixed to the left side of the inside of the connecting ring 11. There are three flexible sheets 14, and only the left side of the multiple flexible sheets 14 is fixed to the traction joint 3. The metal hook 12 is hooked in the connecting ring 11. The flexible sheet 14 is squeezed and deformed. The metal hook 12 is not easy to fall off in the connecting ring 11, and the connection is stable.

[0022] In this embodiment, the inner wall of the traction pipe 2 has an internal thread 17, and the internal thread 17 is matched with the external thread 16 on the traction joint 3, so that the traction joint 3 and the traction pipe 2 can be threadedly connected together.

[0023] In this embodiment, a metal hook 12 is inserted into the connecting ring 11, and the metal hook 12 is detachably connected to the connecting ring 11. A steel wire rope 13 is fixedly connected to the right side of the metal hook 12. One end of a new traction steel wire rope is tied to the traction joint 3 and connected to the traction connecting pipe 2 at the end of the metal hose. The hose is pulled out of the cooling wall water pipe by the traction of the steel wire rope 13. After pulling it out, the connection of the metal hose is cut off at an appropriate length to complete the traction work of the metal hose.

[0024] In this embodiment, a hole 5 is integrally formed on the outside of the joint body 4, and a filler is pressed into the hole 5 to seal the gap between the annular bellows 1 and the joint body 4 and the connecting pipe 6; after the annular metal hose passes through, the gap between the joint body 4 and the connecting pipe 6 is sealed by pressing the filler through the hole 5.

[0025] The working principle of this device is:

[0026] The metal hose is designed as an annular bellows 1. Since the annular bellows 1 has parallel grooves, it can be reliably compressed by a clamping ring. One end of the hose has a traction pipe 2 welded to the hose, which is connected to the traction joint 3 by a thread, so it will not get loose, and the reliability is greatly improved. In the design of the hose traction device, one end of the new traction wire rope is tied to the traction joint 3 and connected to the traction pipe 2 at the end of the metal hose. The hose is pulled out of the cooling wall water pipe by the traction of the wire rope 13. After pulling it out, the connection of the metal hose is cut off at an appropriate length to complete the traction of the metal hose. The structure of the pipeline joint sealing device, the annular bellows 1 passes through the front joint body 4, passes through the transition end joint 6, and the head end is compressed by the clamp ring 7 and the plug 8. After the annular metal hose passes through, the gap between the joint body 4 and the connecting pipe 6 is sealed by pressing the packing from the hole 5, and the pipeline flow medium is sealed by a metal gasket with high plastic deformation. After the pipe is threaded, a separate external water pipe (hose connection) is used for the pipe, and the upper and lower interfaces of the cut original leaking pipe are connected and short-circuited with hard pipes.

[0027] The electrical components that appear in this article are all electrical components that exist in reality.

[0028] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A metal pipe for repairing a damaged blast furnace cooling wall, comprising an annular corrugated pipe (1) and a joint body (4), characterized in that: A traction pipe (2) is arranged on the right side of the annular bellows (1), the traction pipe (2) and the annular bellows (1) are integrally formed, the traction pipe (2) is adapted to be equipped with a support assembly (15), a connecting pipe (6) is arranged on the right side of the interior of the joint body (4), the connecting pipe (6) is fixedly connected to the joint body (4), the annular bellows (1) is pulled out from the cooling wall water pipe, and the metal hose connection is cut off after being pulled out to an appropriate length, the annular bellows (1) passes through the joint body (4) and penetrates into the interior of the connecting pipe (6), a metal gasket No. 1 (9) is arranged on the right side of the inner wall of the connecting pipe (6), the metal gasket No. 1 (9) is fixedly connected to the connecting pipe (6), a clamping ring (7) is fixedly connected to the right side of the exterior of the connecting pipe (6), a plug (8) is installed inside the clamping ring (7), and a metal gasket No. 2 (10) is fixedly connected to the left side of the inner wall of the plug (8).

2. The metal pipe for repairing a damaged blast furnace cooling stave according to claim 1, characterized in that: The support assembly (15) comprises a traction joint (3), a connecting ring (11) and a flexible sheet (14); the outside of the traction joint (3) has an external thread (16); the right side of the traction joint (3) is fixedly connected to the connecting ring (11); the left side of the inside of the connecting ring (11) is glued and fixed to the flexible sheet (14); and there are three flexible sheets (14).

3. The metal pipe for repairing a damaged blast furnace cooling stave according to claim 2, characterized in that: The inner side wall of the traction pipe (2) has an internal thread (17), and the internal thread (17) is matched with the external thread (16) on the traction joint (3).

4. The metal pipe for repairing a damaged blast furnace cooling stave according to claim 2, characterized in that: A metal hook (12) is inserted into the connection ring (11), the metal hook (12) is detachably connected to the connection ring (11), and a steel wire rope (13) is fixedly connected to the right side of the metal hook (12).

5. The metal pipe for repairing a damaged blast furnace cooling stave according to claim 1, characterized in that: The joint body (4) is integrally formed with a hole (5) on the outside, and a filler is pressed into the hole (5) to seal the gap between the joint body (4), the annular corrugated pipe (1), and the connecting pipe (6).

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