Built-in bellows pressure ring for submerged arc furnace

Abstract

The utility model discloses a built-in bellows pressure ring of ore heat electric stove, including the pressure ring of two semicircle ring body articulates, the pressure ring includes ring body, the inside ring body and outer ring body of inside and outside distribution are divided to the ring body by the partition, the inside ring body evenly distributes hydraulic pressure and tight bellows pipe periphery, the built-in bellows pipe mounting structure is formed to the flange connection of the outside of hydraulic pressure and tight bellows pipe through bolt and setting in the outer ring body inner side wall, the built-in bellows pipe mounting structure is utilized to the present application, and the outside of hydraulic pressure and tight bellows pipe is not contacted directly with the high temperature flue gas in the furnace, and the service life of pressure ring is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure rings for submerged arc furnaces, and in particular to a built-in bellows pressure ring for submerged arc furnaces. Background Technology

[0002] The electrode holding system is a crucial component of an electric submerged arc furnace (EAF). Currently, commonly used copper bearing clamping methods in domestic electrode holding systems include: bellows type, conical ring type, bladder type, and pressure ring type. Pressure rings are generally installed externally, such as... Figure 1 and Figure 2 As shown, the inner side of the hydraulically tightened bellows 30 tightens the copper tile 50, while the outer side is exposed and directly in contact with the high-temperature environment and gas inside the furnace. The temperature generally reaches 500℃-1250℃, and the instantaneous temperature of the sprayed material can reach over 1500℃, affecting the service life of the pressure ring. The oil pipe 28 is also directly exposed to the high-temperature environment. If the temperature of the oil pipe 28 is too high, it will cause the hydraulic medium to deteriorate, which will affect the use of the hydraulically tightened bellows 30. The bottom of the pressure ring is closest to the inside of the furnace and is subject to high-temperature auxiliary heating for a long time. The bottom of the pressure ring is prone to deformation and weld cracking. Utility Model Content

[0003] The purpose of this invention is to provide a built-in bellows pressure ring for a submerged arc furnace.

[0004] The innovation of this utility model lies in the following: the built-in bellows installation structure effectively protects the outer side of the hydraulic clamping bellows from direct contact with the high-temperature flue gas inside the furnace, greatly improving the service life of the pressure ring; the integrated oil-water return pipe structure can reduce the oil pipe temperature and prevent the hydraulic medium from deteriorating.

[0005] To achieve the aforementioned objectives, the technical solution of this utility model is as follows: A pressure ring with an internal corrugated pipe for a submerged arc furnace includes a pressure ring formed by two semi-circular rings hinged together. The pressure ring includes a ring body, which is divided into an inner ring and an outer ring by a central partition. Hydraulically tightened corrugated pipes are evenly distributed around the inner ring body. The outer side of the hydraulically tightened corrugated pipes is connected to a flange located on the inner wall of the outer ring body via bolts, forming an internal corrugated pipe installation structure. Copper tiles are tightened on the inner side of the hydraulically tightened corrugated pipes. The inner ring body is divided into an inner water-cooling channel by several inner water-insulating plates, and the outer ring body is divided into an outer water-cooling channel by several outer water-insulating plates. An inner water inlet pipe is installed at the top of one side of the inner water-cooling channel, and an inner water return pipe is installed at the top of the other side. An oil pipe is coaxially installed inside the inner water return pipe, forming an integrated oil-water return pipe structure. An outer water inlet pipe is installed at the top of one side of the outer water-cooling channel, and an outer water return pipe is installed at the top of the other side. A high-temperature resistant insulating layer is also provided at the bottom of the ring body.

[0006] Furthermore, the thickness of the high-temperature resistant insulation layer is 8-10 cm.

[0007] Furthermore, a grab pin is provided at the bottom of the ring body, and the grab pin is inserted into the high-temperature resistant insulation layer.

[0008] Furthermore, the volume ratio of the inner ring to the outer ring is 2:1.

[0009] Furthermore, the ratio of the number of inner water-cooling channels to the number of outer water-cooling channels is 3:2. The beneficial effects of this utility model are: First: This application divides the ring body into an inner ring body and an outer ring body. The outer side of the hydraulically tightened bellows is connected to the flange set on the inner wall of the outer ring body to form a built-in bellows installation structure, which avoids the outer side of the hydraulically tightened bellows being exposed, effectively protecting the outer side of the hydraulically tightened bellows from direct contact with the high-temperature flue gas in the furnace. Furthermore, the water-cooling structure of the outer ring body can cool the outer side of the hydraulically tightened bellows, greatly improving the service life of the pressure ring.

[0010] Second: Placing the oil pipe inside the inner return water pipe forms an integrated oil-water return water pipe structure, which can reduce the oil pipe temperature and prevent the hydraulic medium from deteriorating.

[0011] Third: A high-temperature resistant insulation layer is set at the bottom of the ring to effectively isolate the high-temperature radiant heat in the furnace and the damage to the bottom of the pressure ring caused by the splashing of furnace charge, thus preventing bottom deformation and weld cracking. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the existing technology structure.

[0013] Figure 2 for Figure 1 Longitudinal cross-sectional view.

[0014] Figure 3 This is a schematic diagram of the structure of this utility model.

[0015] Figure 4 This is a longitudinal sectional view of the present invention.

[0016] In the diagram: 10 is the ring body, 11 is the middle partition, 12 is the high-temperature resistant insulation layer, 13 is the grab nail, 20 is the inner ring body, 21 is the outer ring body, 22 is the inner water baffle, 23 is the inner water cooling channel, 24 is the outer water baffle, 25 is the outer water cooling channel, 26 is the inner water inlet pipe, 27 is the inner water return pipe, 28 is the oil pipe, 30 is the hydraulic tightening corrugated pipe, 40 is the flange, and 50 is the copper tile. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0018] A built-in bellows pressure ring for a submerged arc furnace includes a pressure ring formed by two semi-circular rings 10 hinged together. Each ring 10 is divided into an inner ring 20 and an outer ring 21 by a central partition 11. Hydraulically tightened bellows 30 are evenly distributed around the inner ring 20. The outer side of each hydraulically tightened bellows 30 is connected to a flange 40 located on the inner wall of the outer ring 21 by bolts. A copper tile 50 is tightened on the inner side of each hydraulically tightened bellows 30. The inner ring 20 is separated by several inner water-proof plates 22. The inner water-cooling channel 23 is formed, and the outer ring body 21 is divided into an outer water-cooling channel 25 by several outer water-insulating plates 24. An inner water inlet pipe 26 is provided on the top of one side of the inner water-cooling channel 23, and an inner water return pipe 27 is provided on the top of the other side. An oil pipe 28 is also coaxially provided in the inner water return pipe 27 to form an oil-water integrated return pipe structure. An outer water inlet pipe is provided on the top of one side of the outer water-cooling channel 25, and an outer water return pipe is provided on the top of the other side. A high-temperature resistant insulating layer 12 is also provided at the bottom of the ring body 10.

[0019] Furthermore, this application divides the ring body 10 into an inner ring body 20 and an outer ring body 21. The outer side of the hydraulically tightened bellows 30 is connected to the flange 40 located on the inner sidewall of the outer ring body 21 to form a built-in bellows installation structure, which avoids the outer side of the hydraulically tightened bellows 30 being exposed, effectively protecting the outer side of the hydraulically tightened bellows 30 from direct contact with the high-temperature flue gas in the furnace. In addition, the water-cooling structure of the outer ring body 21 can cool the outer side of the hydraulically tightened bellows 30, greatly improving the service life of the pressure ring.

[0020] Furthermore, placing the oil pipe 28 inside the inner return water pipe 27 forms an integrated oil-water return water pipe structure, which can reduce the temperature of the oil pipe 28 and prevent the hydraulic medium from deteriorating.

[0021] Furthermore, the thickness of the high-temperature resistant insulating layer 12 is 8-10 cm.

[0022] Furthermore, a high-temperature resistant insulating layer 12 is provided at the bottom of the ring body 10, which can effectively prevent deformation of the bottom of the pressure ring.

[0023] Furthermore, a grab stud 13 is provided at the bottom of the ring body 10, and the grab stud 13 is inserted into the high temperature resistant insulating layer 12.

[0024] Furthermore, the volume ratio of the inner ring 20 to the outer ring 21 is 2:1.

[0025] Furthermore, the ratio of the number of inner water-cooling channels 23 to the number of outer water-cooling channels 25 is 3:2.

[0026] The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A built-in bellows pressure ring for a submerged arc furnace, comprising a pressure ring hinged together from two semi-circular rings (10), characterized in that: The ring body (10) is divided into an inner ring body (20) and an outer ring body (21) by a partition plate (11). The inner ring body (20) is evenly distributed with hydraulically tightened bellows (30) around its circumference. The outer side of the hydraulically tightened bellows (30) is connected to the flange (40) set on the inner side wall of the outer ring body (21) by bolts. The inner side of the hydraulically tightened bellows (30) tightens the copper tile (50). The inner ring (20) is divided into an inner water-cooling channel (23) by several inner water-insulating plates (22), and the outer ring (21) is divided into an outer water-cooling channel (25) by several outer water-insulating plates (24). An inner water inlet pipe (26) is provided on the top of one side of the inner water-cooling channel (23), and an inner water return pipe (27) is provided on the top of the other side. An oil pipe (28) is also coaxially provided in the inner water return pipe (27) to form an oil-water integrated return pipe structure. An outer water inlet pipe is provided on the top of one side of the outer water-cooling channel (25), and an outer water return pipe is provided on the top of the other side. A high-temperature resistant insulation layer (12) is also provided at the bottom of the ring (10).

2. The built-in bellows pressure ring for a submerged arc furnace according to claim 1, characterized in that: The thickness of the high-temperature resistant insulating layer (12) is 8-10cm.

3. The built-in bellows pressure ring for a submerged arc furnace according to claim 1, characterized in that: The bottom of the ring (10) is also provided with a grab stud (13), which is inserted into the high temperature resistant insulation layer (12).

4. The built-in bellows pressure ring for a submerged arc furnace according to claim 1, characterized in that: The volume ratio of the inner ring (20) to the outer ring (21) is 2:

1.

5. The built-in bellows pressure ring for a submerged arc furnace according to claim 1, characterized in that: The ratio of the number of inner water-cooling channels (23) to the number of outer water-cooling channels (25) is 3:2.

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