A hot bend pipe device for RH and a using method thereof

Abstract

The present application belongs to the technical field of RH secondary refining, and particularly relates to a hot elbow device for RH and a use method thereof, comprising a first pipeline, a second pipeline and a communication elbow for connecting the first pipeline and the second pipeline, both sides of the communication elbow are provided with connecting mechanisms, a side wall of the communication elbow is fixedly provided with an inspection manhole mechanism, and two fixed through holes are formed in the top end of the communication elbow, and a hole wall of one of the fixed through holes is fixedly connected with an observation mechanism for the internal inspection of the communication elbow. The device has the advantages of simple principle, stable and reliable performance, and can realize waste heat recycling, achieve the purpose of energy saving and emission reduction, greatly reduce the consumption of refractory materials in the RH production process, create conditions for waste heat recovery in the RH vacuum refining process, and further reduce the production cost of the RH refining process.

Description

Technical Field

[0001] This invention belongs to the field of RH ladle refining technology, and in particular relates to a hot bending device for RH and its usage method. Background Technology

[0002] RH vacuum refining technology is an indispensable part of the refining process in modern steel enterprises. However, the RH vacuum refining process increases the cost of the process. Among them, the consumption of refractory materials is one of the main costs of the RH vacuum refining process. The hot bending tube device is one of the main devices of the RH vacuum refining system. It is used to connect the hot bending tube and the gas extraction pipe to introduce the high-temperature waste gas from smelting into the subsequent cooling system and vacuum pump system.

[0003] Currently used hot bending pipe devices employ a steel shell with refractory lining inside. This necessitates frequent refractory replacements, increasing refractory consumption and maintenance costs. Furthermore, the use of refractory materials increases the weight of the hot bending pipe device several times over, thereby increasing the investment and maintenance costs of its supporting facilities. In addition, due to the use of refractory materials, it is impossible to recover the waste heat from the RH production process, and it does not meet the current environmental protection requirements for energy conservation and emission reduction.

[0004] To address these issues, we propose a hot bending device and its usage method for RH (Heat Reduction) pipes. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a heat bending device and method for using RH (heat-resistant) pipes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a heat bending device for RH, comprising a first pipe, a second pipe, and a connecting bend for connecting the first pipe and the second pipe, wherein both ends of the connecting bend are provided with connecting mechanisms; The side wall of the connecting bend is fixedly provided with a maintenance manhole mechanism; The top of the connecting bend has two fixed through holes. One of the fixed through holes has an observation mechanism for inspecting the inside of the connecting bend fixedly connected to its wall, and the other fixed through hole has a top gun mechanism fixedly connected to its wall. A water-cooling coil is fixedly connected to the outer wall of the connecting bend.

[0007] In the above-mentioned RH hot bending pipe device, the connecting mechanism includes a water-cooled flange that is fixedly connected to the port of the connecting pipe, and a sealing ring for sealing the water-cooled flange is installed on the outer wall of the water-cooled flange.

[0008] In the above-mentioned RH hot bending pipe device, the outer wall of the water-cooled flange is provided with a first water inlet, and the inner wall of the first water inlet is fixedly connected with a first cold water pipe joint. The outer wall of the water-cooled flange is provided with a first water outlet, and the inner wall of the first water outlet is fixedly connected with a first hot water pipe joint.

[0009] In the above-mentioned RH hot bending pipe device, the maintenance manhole mechanism includes a maintenance manhole pipe that is fixedly connected to the outer wall of the connecting bend pipe, and a sealing cover plate is hinged to the outer wall of the maintenance manhole pipe through a hinge member. The sealing cover plate is fixedly connected to the connecting hole at the side edge of the maintenance manhole pipe by bolts.

[0010] In the above-mentioned RH hot bending pipe device, the inside of the maintenance manhole pipe is provided with an annular cavity, and the cavity wall of the annular cavity is provided with a second water inlet and a second water outlet. The inner walls of the second water inlet and the second water outlet are respectively fixedly connected with a second cold water pipe joint and a second hot water pipe joint.

[0011] In the above-mentioned RH hot bending pipe device, the observation mechanism includes a connecting pipe that is fixedly connected to the outer wall of the connecting pipe, and a camera is fixedly connected to the inner wall of the connecting pipe in a sealed manner.

[0012] In the above-mentioned RH hot bending pipe device, the inside of the connecting pipe is provided with an annular cavity, and the wall of the annular cavity is provided with a third water inlet and a third water outlet. The inner walls of the third water inlet and the third water outlet are respectively fixedly connected with a third cold water pipe joint and a third hot water pipe joint.

[0013] In the above-mentioned RH hot bending pipe device, the top gun mechanism includes a top gun channel seat that is fixedly connected to the outer wall of the connecting pipe. The top end of the top gun channel seat is fixedly connected to a sealing component by bolts, and the inner wall of the sealing component is fixedly connected to the top gun body.

[0014] In the above-mentioned RH hot bending pipe device, the top gun channel seat has an annular cavity inside, and the wall of the annular cavity has a fourth water inlet and a fourth water outlet. The inner walls of the fourth water inlet and the fourth water outlet are respectively fixedly connected to a fourth cold water pipe joint and a fourth hot water pipe joint.

[0015] A method of using an RH hot bending device, comprising the above-mentioned RH hot bending device, includes the following steps: S1. When the device is in use, the two ends of the connecting bend are connected to the first pipe and the second pipe respectively through the connecting mechanism. During the connection process, they can cooperate freely to ensure concentricity and parallelism. Then, they are fixed by water-cooled flanges. At the same time, they are also sealed by sealing rings to ensure the sealing effect. S2. Next, install the camera through the connecting pipe; S3. Then install the top gun body through the top gun channel seat and sealing assembly; S4. Finally, connect the water cooling coil, connection mechanism, inspection manhole mechanism, observation mechanism, and top gun mechanism to the corresponding water pipes for the cooling water ports used to recover heat.

[0016] Compared with existing technologies, the advantages of a RH hot bending device and its usage method are: With its water-cooled coil, connecting mechanism, inspection manhole mechanism, observation mechanism, and top gun mechanism, the device connects the two ends of the connecting bend to the first and second pipes respectively via the connecting mechanism during use. The connection process allows for free coordination to ensure concentricity and parallelism. The pipes are then fixed with a water-cooled flange and sealed with a sealing ring to ensure a tight seal. A camera is installed at the connecting pipe, and the top gun body is installed at the top gun channel seat and sealing assembly, creating a sealed environment for RH vacuum refining production. The camera allows real-time monitoring of the production status, while the top gun body ensures normal production. Opening the sealing cover allows for convenient inspection and maintenance through the inspection manhole. This mechanism not only ensures the device's simple principle and stable reliability but also enables waste heat recovery and reuse, achieving energy conservation and emission reduction. Furthermore, it significantly reduces refractory material consumption in the RH production process, creates conditions for waste heat recovery in the RH vacuum refining process, and helps further reduce the production cost of the RH refining process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a RH hot bending device and its usage method provided by the present invention; Figure 2 yes Figure 1 A magnified schematic diagram of a portion of the structure.

[0018] In the diagram: 1. First pipe; 2. Second pipe; 3. Connecting bend; 4. Connecting mechanism; 41. Water-cooled flange; 42. Sealing ring; 5. Inspection manhole mechanism; 51. Inspection manhole pipe; 52. Sealing cover; 6. Observation mechanism; 61. Connecting pipe; 62. Camera; 7. Top gun mechanism; 71. Top gun channel seat; 72. Sealing assembly; 73. Top gun body; 8. Water-cooled coil; 9. First cold water pipe joint; 10. First hot water pipe joint; 11. Second cold water pipe joint; 12. Second hot water pipe joint; 13. Third cold water pipe joint; 14. Third hot water pipe joint; 15. Fourth cold water pipe joint; 16. Fourth hot water pipe joint. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-2 As shown, a RH hot bending device includes a first pipe 1, a second pipe 2, and a connecting bend 3 for connecting the first pipe 1 and the second pipe 2. The inner wall of the connecting bend has a refractory material thickness of 10mm, which significantly reduces the refractory material and increases the construction cost of the device. Both ends of the connecting bend 3 are provided with a connecting mechanism 4. The connecting mechanism 4 includes a water-cooled flange 41 fixedly connected to the port of the connecting bend 3. The outer wall of the water-cooled flange 41 is equipped with a sealing ring 42 for sealing the connection of the water-cooled flange 41. The outer wall of the water-cooled flange 41 has a first water inlet, and the inner wall of the first water inlet is fixedly connected with a first cold water pipe joint 9. The outer wall of the water-cooled flange 41 has a first water outlet, and the inner wall of the first water outlet is fixedly connected with a first hot water pipe joint 10.

[0021] A maintenance manhole mechanism 5 is fixedly provided on the side wall of the connecting bend 3. The maintenance manhole mechanism 5 includes a maintenance manhole pipe 51 that is fixedly connected to the outer wall of the connecting bend 3. A sealing cover plate 52 is hinged to the outer wall of the maintenance manhole pipe 51 through a hinge. The sealing cover plate 52 is fixedly connected to the connecting hole at the side edge of the maintenance manhole pipe 51 by bolts. The maintenance manhole pipe 51 has an annular cavity inside. A second water inlet and a second water outlet are provided on the cavity wall of the annular cavity. A second cold water pipe joint 11 and a second hot water pipe joint 12 are fixedly connected to the inner walls of the second water inlet and the second water outlet, respectively.

[0022] Two fixed through holes are opened at the top of the connecting bend 3. An observation mechanism 6 for inspecting the inside of the connecting bend 3 is fixedly connected to the wall of one of the fixed through holes. The observation mechanism 6 includes a connecting pipe 61 fixedly connected to the outer wall of the connecting bend 3, and a camera 62 is fixedly connected to the inner wall of the connecting pipe 61. The inside of the connecting pipe 61 is provided with an annular cavity, and the wall of the annular cavity is provided with a third water inlet and a third water outlet. The inner walls of the third water inlet and the third water outlet are respectively fixedly connected to a third cold water pipe joint 13 and a third hot water pipe joint 14.

[0023] Another fixed through hole is fixedly connected to the wall of the hole with a top gun mechanism 7. The top gun mechanism 7 includes a top gun channel seat 71 that is fixedly connected to the outer wall of the connecting bend 3. The top of the top gun channel seat 71 is fixedly connected to a sealing component 72 by bolts, and the inner wall of the sealing component 72 is fixedly connected to the top gun body 73. The top gun channel seat 71 has an annular cavity inside, and the wall of the annular cavity has a fourth water inlet and a fourth water outlet. The inner walls of the fourth water inlet and the fourth water outlet are fixedly connected to a fourth cold water pipe joint 15 and a fourth hot water pipe joint 16, respectively. The outer wall of the connecting bend 3 is fixedly connected to a water cooling coil 8.

[0024] The operating principle of the present invention is described as follows: When the device is in use, the two ends of the connecting bend 3 are connected to the first pipe 1 and the second pipe 2 respectively through the connecting mechanism 4. During the connection process, free cooperation is ensured to ensure concentricity and parallelism. Then, it is fixed by the water-cooled flange 41. At the same time, it is also sealed by the sealing ring 42 to ensure the sealing effect. At this time, a camera 62 is installed at the connecting pipe 61, and the top gun body 73 is installed at the top gun channel seat 71 and the sealing component 72, which will form a closed environment for RH vacuum refining production. The camera 62 can observe the production status in real time, and the top gun body 73 ensures normal production. The connecting bend 3 is a U-shaped structure made of rolled and welded steel plate, used to introduce high-temperature waste gas in the RH vacuum refining furnace production process. The water-cooled coil 8 set on the outside of the connecting bend 3 can recover heat. It can be filled with cold water, which absorbs heat and turns into hot water. The hot water flows out to realize the recovery of waste heat in RH production. In addition, the production status can be observed in real time by installing a camera 62. In addition, during the preparation and production of the RH vacuum refining furnace, cooling water is introduced into the water inlet of the water-cooled coil 8, the first cold water pipe joint 9 at the connecting mechanism 4, the second cold water pipe joint 11 at the maintenance manhole mechanism 5, the third cold water pipe joint 13 at the observation mechanism 6, and the fourth cold water pipe joint 15 at the top gun mechanism 7. The cooling water absorbs heat and recovers heat, thereby raising the temperature of the cooling water. Finally, the hot water is discharged through the water outlet of the water-cooled coil 8, the first hot water pipe joint 10 at the connecting mechanism 4, the second hot water pipe joint 12 at the maintenance manhole mechanism 5, the third hot water pipe joint 14 at the observation mechanism 6, and the fourth hot water pipe joint 16 at the top gun mechanism 7. This realizes the heat recovery of the connecting pipe area during the production process of the RH vacuum refining furnace. This mechanism not only makes the device simple in principle and stable and reliable, but also enables the recovery and reuse of waste heat, achieving the purpose of energy saving and emission reduction. It also helps to significantly reduce the consumption of refractory materials in the RH production process, creates conditions for waste heat recovery in the RH vacuum refining process, and helps to further reduce the production cost of the RH refining process.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat bending device for RH applications, comprising a first pipe (1), a second pipe (2), and a connecting bend (3) for connecting the first pipe (1) and the second pipe (2), characterized in that, Both ends of the connecting bend (3) are provided with connecting mechanisms (4). The side wall of the connecting bend (3) is fixedly provided with a maintenance manhole mechanism (5); The top of the connecting bend (3) has two fixed through holes. One of the fixed through holes is fixedly connected to an observation mechanism (6) for inspecting the inside of the connecting bend (3), and the other fixed through hole is fixedly connected to a top gun mechanism (7). The outer wall of the connecting bend (3) is fixedly connected to a water-cooling coil (8). The maintenance manhole mechanism (5) includes a maintenance manhole pipe (51) that is fixedly connected to the outer wall of the connecting bend (3), and the outer wall of the maintenance manhole pipe (51) is hinged with a sealing cover plate (52) by a hinge member. The sealing cover plate (52) is fixedly connected to the side edge of the maintenance manhole pipe (51) by bolts. The manhole pipe (51) has an annular cavity inside, and the cavity wall of the annular cavity has a second water inlet and a second water outlet. The inner walls of the second water inlet and the second water outlet are respectively fixedly connected to a second cold water pipe joint (11) and a second hot water pipe joint (12). The top gun mechanism (7) includes a top gun channel seat (71) that is fixedly connected to the outer wall of the connecting bend (3). The top of the top gun channel seat (71) is fixedly connected to a sealing component (72) by bolts, and the inner wall of the sealing component (72) is fixedly connected to the top gun body (73). The top gun channel seat (71) has an annular cavity inside, and the wall of the annular cavity has a fourth water inlet and a fourth water outlet. The inner walls of the fourth water inlet and the fourth water outlet are respectively fixedly connected to a fourth cold water pipe joint (15) and a fourth hot water pipe joint (16).

2. The RH hot bending device according to claim 1, characterized in that, The connecting mechanism (4) includes a water-cooled flange (41) fixedly connected to the port of the connecting bend (3), and the outer wall of the water-cooled flange (41) is fitted with a sealing ring (42) for sealing the connection of the water-cooled flange (41).

3. The RH hot bending device according to claim 2, characterized in that, The outer wall of the water-cooled flange (41) is provided with a first water inlet, and the inner wall of the first water inlet is fixedly connected with a first cold water pipe joint (9). The outer wall of the water-cooled flange (41) is provided with a first water outlet, and the inner wall of the first water outlet is fixedly connected with a first hot water pipe joint (10).

4. The RH hot bending device according to claim 3, characterized in that, The observation mechanism (6) includes a connecting pipe (61) that is fixedly connected to the outer wall of the connecting bend (3), and a camera (62) is fixedly connected to the inner wall of the connecting pipe (61).

5. A RH-type hot bending device according to claim 4, characterized in that, The connecting pipe (61) has an annular cavity inside, and the wall of the annular cavity has a third water inlet and a third water outlet. The inner walls of the third water inlet and the third water outlet are respectively fixedly connected to a third cold water pipe joint (13) and a third hot water pipe joint (14).

6. A method of using a RH hot bending device, comprising the RH hot bending device as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. When the device is in use, the two ends of the connecting bend (3) are connected to the first pipe (1) and the second pipe (2) respectively through the connecting mechanism (4). During the connection process, they can cooperate freely to ensure concentricity and parallelism. Then, they are fixed by the water-cooled flange (41). At the same time, they are also sealed by the sealing ring (42) to ensure the sealing effect. S2. Next, install the camera (62) through the connecting pipe (61). S3. Then install the top gun body (73) through the top gun channel seat (71) and sealing assembly (72). S4. Finally, connect the water cooling coil (8), the connection mechanism (4), the maintenance manhole mechanism (5), the observation mechanism (6), and the top gun mechanism (7) to the corresponding water pipes for the cooling water ports used to recover heat.

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