Submerged arc furnace cover cooling device

Abstract

The utility model belongs to the technical field of smelting equipment, and particularly relates to a submerged arc furnace cover cooling device which is mainly used for prolonging the service life of a submerged arc furnace. Comprising a boiler body and a boiler end cover, the boiler end cover is detachably fixed to the upper end of the boiler body, the boiler end cover is of a hollow structure, two sets of symmetrical cooling water pipes are distributed in the boiler end cover, each set of cooling water pipes are fixed to vertical plates through connecting pieces, and a restoring force spring is fixed between the two vertical plates. The water-cooling furnace cover can effectively avoid the problem that when the water-cooling furnace cover of the submerged arc furnace is subjected to high-temperature furnace gas, a water-cooling system directly cools the furnace cover, so that the furnace cover cracks and peels off due to thermal expansion and cold contraction of the furnace cover.

Description

Technical Field

[0001] The utility model belongs to the technical field of smelting equipment, and in particular relates to a submerged arc furnace cover cooling device, which is mainly used for improving the service life of the submerged arc furnace. Background Art

[0002] Submerged arc furnaces, also known as electric arc furnaces or resistance furnaces, are primarily used for reducing and smelting raw materials such as ores, carbonaceous reducing agents, and solvents. They primarily produce ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, and silicon-manganese alloys, which are important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. Submerged arc furnace transformers offer continuous and stable loads, low impedance voltage, a large number of voltage regulation stages, small step differences, and strong overload capacity.

[0003] In the prior art, the cooling of the furnace cover of the submerged arc furnace mainly adopts a water-cooling structure, which is a process technology that can significantly improve the service life of the furnace cover. Usually, a water-cooling ring wrapped with a steel pipe is set at the lower end of the furnace cover to reduce the temperature inside the furnace. However, there are certain problems in the use of the existing water-cooled furnace cover. The water source inside the cold water pipe is not easy to replace; furthermore, when the existing water-cooled furnace cover of the submerged arc furnace is subjected to high-temperature furnace gas, the water cooling system directly cools the furnace cover, which will cause the furnace cover to expand and contract due to heat and cold, and easily cause the furnace cover to crack and peel off, thereby reducing its service life. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a submerged arc furnace cover cooling device to solve the problem that the water source inside the existing furnace cover cold water pipe is difficult to replace.

[0005] A submerged arc furnace cover cooling device comprises a boiler body and a boiler end cover. The boiler end cover is detachably fixed to the upper end of the boiler body. The boiler end cover is a hollow structure. Two groups of symmetrical cooling water pipes are distributed inside the boiler end cover. Each group of cooling water pipes is fixed to a vertical plate through a connecting piece, and a restoring force spring is fixed between the two vertical plates.

[0006] Furthermore, in order to facilitate the fixing of the boiler end cover, a support plate is provided on the circumference of the boiler end cover, and a number of clamping parts are provided at equal angles in the circumferential direction below the support plate;

[0007] The clamping part mainly includes: a hydraulic cylinder and a clamping block. The upper part of the hydraulic cylinder is hinged to the lower part of the support plate, the free end of the hydraulic cylinder is hinged to one end of the clamping block, the middle of the clamping block is hinged to the waist-shaped connecting part provided at the lower part of the support plate through a pin shaft, and the other end of the clamping block is provided with an arc-shaped clamping part, which is connected to the arc-shaped clamping mother part provided in the circumferential direction of the end part of the boiler body.

[0008] Furthermore, in order to ensure the sealing between the boiler body and the boiler end cover, and to facilitate the disassembly of the boiler body and the boiler end cover, a first wedge block is provided at the connection between the boiler end cover and the boiler body, and the first wedge block cooperates with the second wedge block provided on the top of the boiler body.

[0009] Furthermore, in order to ensure water circulation in the cooling water pipes, adjacent two cooling water pipes in each group of cooling water pipes are connected in series through a water inlet pipe. A water outlet is provided on the end of the cooling water pipe away from the water inlet pipe, and the water outlet also connects the adjacent two cooling water pipes in series.

[0010] Furthermore, in order to increase the cooling effect of the cooling water pipe, the cooling water pipe is surrounded by a heat sink and a vertical plate, and a cold air inlet and a cold air outlet are provided on the upper part of the heat sink at the upper end.

[0011] Furthermore, in order to improve the cooling efficiency of the cold air, a partition is provided between two adjacent cooling water pipes, and the air inlets of the two adjacent partitions are staggered, that is, the air inlet of the partition located in front of the two adjacent partitions is located at the top, and the air inlet partition of the partition located behind can only be at the bottom. The partition allows the cold air to flow in an S shape between the cooling water pipes.

[0012] In summary, due to the adoption of the above technical solution, the beneficial technical effects of the utility model are:

[0013] A submerged arc furnace cover cooling device features two symmetrical sets of cooling water pipes within the boiler cover. Each set is secured to a vertical plate via connectors, and a restoring spring is secured between the two plates. Installation and disassembly require only pressing the cooling water pipes on both sides in the same direction, then inserting the entire cooling water pipe into the boiler cover. The restoring springs ensure that the cooling water pipes remain tightly attached to the inner wall of the cover. Furthermore, when the cover is cooled, the restoring springs offset some of the thermal expansion and contraction, preventing cracking and peeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the main view of the utility model.

[0015] Figure 2 For this utility model Figure 1 Top view of .

[0016] Figure 3 For this utility model Figure 2 Schematic diagram of the cross section in the BB direction.

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model.

[0018] Figure 5 This is a schematic diagram of the distribution of cooling water pipes of the utility model.

[0019] Figure 6 This is a structural diagram of the card block of the utility model.

[0020] In the figure: boiler body 1, boiler end cover 2, cooling water pipe 3, vertical plate 4, restoring force spring 5, water inlet pipe 6, support plate 7, hydraulic cylinder 8, clamping block 9, waist-shaped connecting piece 10, pin 11, arc-shaped buckle mother part 12, first wedge block 13, second wedge block 14, cold air inlet 15, cold air outlet 16, arc-shaped buckle sub-part 17, heat sink 18, partition 19, water outlet 20. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not intended to limit the utility model.

[0022] Example 1

[0023] In this embodiment, Figure 2-4 As shown, a cooling device for the furnace cover of an electric arc furnace comprises a boiler body 1 and a boiler end cover 2. The boiler end cover 2 is detachably fixed to the upper end of the boiler body 1. The boiler end cover 2 is a hollow structure. Two groups of symmetrical cooling water pipes 3 are distributed in the boiler end cover 2. Each group of cooling water pipes 3 is fixed to a vertical plate 4 through a connector, and a restoring force spring 5 is fixed between the two vertical plates 4. When installing and disassembling, it is only necessary to press the cooling water pipes 3 on both sides in the same direction, and then insert the entire cooling water pipe 3 into the boiler end cover 2. Due to the action of the restoring force spring 5, the cooling water pipes 3 on both sides are always tightly fitted with the inner wall of the boiler end cover 2.

[0024] Example 2

[0025] In this embodiment, Figure 2-4 As shown, the boiler end cover 2 is provided with a support plate 7 on the circumference, and several clamping parts are provided at equal angles in the circumferential direction below the support plate 7; the clamping parts mainly include: a hydraulic cylinder 8 and a clamping block 9, the upper part of the hydraulic cylinder 8 is hinged to the lower part of the support plate 7, the free end of the hydraulic cylinder 8 is hinged to one end of the clamping block 9, the middle of the clamping block 9 is hinged to the waist-shaped connecting part 10 provided at the lower part of the support plate 7 through a pin shaft 11, and the other end of the clamping block 9 is provided with an arc-shaped clamping part 17, which is connected to the arc-shaped clamping mother part 12 provided in the circumferential direction of the end part of the boiler body 1. The hydraulic cylinder 8 pushes the clamping block 9 to rotate around the pin shaft 11. When tightening is required, the driving rod of the hydraulic cylinder 8 pushes the clamping block 9 to move downward away from the side of the arc-shaped clamping part 17. At this time, the clamping block 9 moves upward close to the side of the arc-shaped clamping part 17. After the arc-shaped clamping part 17 moves upward for a distance, the arc-shaped clamping part 17 is connected to the arc-shaped clamping mother part 12.

[0026] Example 3

[0027] In this embodiment, Figure 3 As shown, in order to ensure the sealing between the boiler body 1 and the boiler end cover 2, and to facilitate the disassembly of the boiler body 1 and the boiler end cover 2, a first wedge block 13 is provided at the connection between the boiler end cover 2 and the boiler body 1, and the first wedge block 13 cooperates with a second wedge block 14 provided on the top of the boiler body 1; in order to prevent the furnace cover from cracking due to thermal expansion and contraction during the cooling process, the first wedge block 13 and the second wedge block 14 are provided with sealing gaskets.

[0028] Example 4

[0029] In this embodiment, Figure 3 As shown, in order to ensure water circulation in the cooling water pipes 3, the adjacent two cooling water pipes 3 in each group of cooling water pipes 3 are connected in series through the water inlet pipe 6, and a water outlet 20 is provided at the end of the cooling water pipe 3 away from the water inlet pipe 6, and the water outlet 20 also connects the adjacent two cooling water pipes 3 in series.

[0030] Example 5

[0031] In this embodiment, Figure 3 As shown, the cooling water pipe 3 is surrounded by the heat sink 18 and the vertical plate 4, and the heat sink 18 and the vertical plate 4 enclose the cooling water pipe 3 in a closed space. The upper part of the heat sink 18 at the upper end is provided with a cold air inlet 15 and a cold air outlet 16. The cold air inlet 15 guides the cold air generated by the cold air generating equipment into the closed space surrounding the cooling water pipe 3, thereby achieving secondary cooling of the cooling water pipe 3; in order to increase the residence time of the cold air in the closed space, a partition 19 is provided between the two adjacent cooling water pipes 3, and the air inlets of the two adjacent partitions 19 are staggered, that is, the air inlet of the partition 19 located in front of the two adjacent partitions 19 is located at the upper part, and the air inlet partition of the rear partition can only be at the bottom. The partition 19 allows the cold air to flow in an S shape between the cooling water pipes 3. Since the cooling gas flows in an S shape in the closed space, the cooling efficiency of the cooling gas is increased. Furthermore, the heat dissipation plate 18 and the vertical plate 4 enclose the cooling water pipe 3 in a closed space. During cooling, the heat dissipation of the cooling plate 18 is relatively uniform, thereby avoiding cracking of the boiler end cover 2 caused by local cooling.

[0032] The above description is a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A submerged arc furnace cover cooling device, comprising a boiler body (1) and a boiler end cover (2), wherein the boiler end cover (2) is detachably fixed to the upper end of the boiler body (1), the boiler end cover (2) is a hollow structure, and two groups of symmetrical cooling water pipes (3) are distributed in the boiler end cover (2), characterized in that: Each group of cooling water pipes (3) is fixed to the vertical plate (4) via a connecting piece, and a restoring force spring (5) is fixed between the two vertical plates (4).

2. The submerged arc furnace roof cooling device according to claim 1, characterized in that: A support plate (7) is provided on the circumference of the boiler end cover (2), and a plurality of clamping parts are provided at equal angles in the circumferential direction below the support plate (7).

3. The submerged arc furnace roof cooling device according to claim 2, characterized in that: The clamping member mainly comprises: a hydraulic cylinder (8) and a clamping block (9); the upper part of the hydraulic cylinder (8) is hinged to the lower part of the support plate (7); the free end of the hydraulic cylinder (8) is hinged to one end of the clamping block (9); the middle of the clamping block (9) is hinged to a waist-shaped connecting member (10) provided at the lower part of the support plate (7) through a pin shaft (11); the other end of the clamping block (9) is provided with an arc-shaped clamping member (17); the arc-shaped clamping member (17) is connected to an arc-shaped clamping female member (12) provided in the circumferential direction of the end of the boiler body (1).

4. The submerged arc furnace roof cooling device according to claim 1, characterized in that: A first wedge block (13) is provided at the connection between the boiler end cover (2) and the boiler body (1), and the first wedge block (13) cooperates with a second wedge block (14) provided on the top of the boiler body (1).

5. The submerged arc furnace roof cooling device according to claim 1, characterized in that: The cooling water pipe (3) is surrounded by a heat sink (18) and a vertical plate (4) provided on the outside thereof, and a cold air inlet (15) and a cold air outlet (16) are provided on the upper portion of the heat sink (18) at the upper end.

6. The submerged arc furnace roof cooling device according to any one of claims 1 and 5, characterized in that: Two adjacent cooling water pipes (3) in each group of cooling water pipes (3) are connected in series via a water inlet pipe (6). An outlet (20) is provided at one end of the cooling water pipe (3) away from the water inlet pipe (6), and the outlet (20) also connects the two adjacent cooling water pipes (3) in series.

7. The submerged arc furnace roof cooling device according to claim 1, characterized in that: A partition (19) is provided between two adjacent cooling water pipes (3), and the air inlets of the two adjacent partitions (19) are staggered, that is, the air inlet of the partition (19) located in front of the two adjacent partitions (19) is located at the upper part, and the air inlet of the partition (19) located behind can only be at the lower part. The partition (19) allows the cold air to flow in an S shape between the cooling water pipes (3).

Images