A new water-cooled sealing sleeve for calcium carbide furnace

Abstract

The utility model discloses a novel water -cooling sealing sleeve of calcium carbide furnace, including water -cooling cover body, is installed with sealing copper ring on water -cooling cover body, and the upper end fixed sealing support has on sealing copper ring, and the upper surface of sealing support is conical surface, and the flexible sealing ring is placed on the conical surface of sealing support, the cross section of flexible sealing ring is right triangle and hypotenuse falls on the conical surface of sealing support, and the multiple briquetting of uniform distribution has on the upper surface circumference of flexible sealing ring, and the inner edge of flexible sealing ring is close to the outer edge of electrode under the pressure of briquetting. Advantageous effects are that double insurance sealing structure is formed through sealing copper ring and flexible sealing ring, and the sealing effect is better, whether electrode offset or flexible sealing ring wear, and the pressure of flexible sealing ring to electrode side surface remains unchanged, thereby guaranteeing that the sealing performance will not weaken, and the pressure source of sealing ring is the gravity of briquetting on it, and the sealing performance is reliable.

Description

Technical Field

[0001] This utility model belongs to the field of electric arc furnaces, and specifically relates to a novel water-cooled sealing sleeve for calcium carbide furnaces. Background Technology

[0002] Because the depth to which the electrodes of a submerged arc furnace are inserted into the furnace cover needs to be adjusted according to the smelting conditions, a dynamic sealing device must be installed near the electrodes on the furnace cover; this device is generally called a water-cooled sealing sleeve. Simultaneously, the feed nozzle of the calcium carbide furnace is usually also installed on the water-cooled sealing sleeve. The electrode sealing and feed nozzle sealing on the water-cooled sealing sleeve have always been important factors affecting calcium carbide furnace production. If the seal is not tight, furnace gas will leak from here, and the combustible gas inside the furnace will ignite upon contact with air, generating high temperatures, which will greatly reduce the service life of nearby equipment; moreover, the smoke and dust in the furnace gas will worsen the working environment for workers. Unburned carbon monoxide leakage even poses a risk of poisoning and explosion.

[0003] Currently, most domestic electric arc furnaces use springs to provide lateral preload to the sealing copper ring to achieve sealing when the electrode shifts. To achieve a proper seal, the sealing copper ring must fit tightly against the electrode; however, the seal between the sealing copper ring and the electrode is a hard seal, resulting in less than ideal sealing performance. Furthermore, to prevent the water-cooled sealing sleeve from sinking and deforming, foreign electric arc furnaces often make the bottom surface of the water-cooled sealing sleeve conical. However, this makes the nozzle mounting surface curved, requiring a large amount of flexible sealing material to be filled between the nozzle and the water-cooled sealing sleeve during installation, leading to significant uncertainty in the sealing effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a new type of water-cooled sealing sleeve for calcium carbide furnaces with good sealing effect and convenient installation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel water-cooled sealing sleeve for a calcium carbide furnace includes a water-cooled sleeve body with a sealing copper ring installed on it. The unique feature is that a sealing support is fixed to the upper end of the sealing copper ring, the upper surface of which is a conical surface. A flexible sealing ring is placed on the conical surface of the sealing support. The flexible sealing ring has a right-angled triangle cross-section with its hypotenuse falling on the conical surface of the sealing support. Multiple pressure blocks are evenly distributed around the circumference of the flexible sealing ring, and the inner edge of the flexible sealing ring is pressed tightly against the outer edge of the electrode under the pressure of the pressure blocks.

[0007] As a further preferred embodiment, the flexible sealing ring is composed of multiple rings evenly distributed around the circumference, and the end faces of two adjacent rings overlap each other at a 45-degree angle.

[0008] As a further preferred embodiment, the flexible sealing ring is made of refractory ceramic fiber material.

[0009] As a further preferred embodiment, there are 12 pressure blocks, each with two handles fixed on it to facilitate manual handling by workers.

[0010] As a further preferred embodiment, the sealing support is composed of four circumferentially distributed segments, with adjacent segments fixedly connected by bolts.

[0011] As a further preferred embodiment, the sealing copper ring includes a copper ring support fixed on the water cooling jacket. Inside the copper ring support, there are two layers of copper rings arranged vertically. Each layer of copper rings is formed by overlapping multiple fan-shaped copper blocks evenly distributed around the circumference. On the copper ring support, there are elastic pressing components corresponding to each copper block, which are used to elastically press the copper block against the outer edge of the electrode.

[0012] As a further preferred embodiment, the water-cooling jacket is composed of four or five circumferentially distributed lobes connected by bolts, with the inner side of the water-cooling jacket being tubular and the outer side being planar annular to facilitate the installation of the nozzle.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. By placing a flexible sealing ring on the conical surface of the sealing support, the inner edge of the flexible sealing ring is pressed tightly against the outer edge of the electrode under the pressure of the pressure block. The sealing copper ring and the flexible sealing ring form a double-insurance sealing structure, resulting in better sealing performance. During operation, regardless of electrode misalignment or wear of the flexible sealing ring, the pressure of the flexible sealing ring on the side of the electrode remains unchanged, thus ensuring that the sealing performance is not weakened. Moreover, the pressure of the sealing ring comes from the gravity of the pressure block above it, which is more uniform and stable compared with other mechanical forces, resulting in reliable sealing performance.

[0015] 2. Simple structure, easy to process, low manufacturing cost; uniform stress distribution, long service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 yes Figure 1 Top view.

[0018] Figure 3 yes Figure 1 Enlarged view of part I.

[0019] In the diagram: 1. Furnace cover; 2. Feed nozzle; 3. Water-cooled jacket; 4. Sealing copper ring; 401. Copper ring support; 402. Copper ring body; 403. Spring mounting sleeve; 404. Pressure spring; 405. Limit cap; 5. Sealing support; 6. Flexible sealing ring; 7. Pressure block; 8. Electrode; 9. Handle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-3 As shown, this utility model relates to a novel water-cooled sealing sleeve for a calcium carbide furnace, comprising a water-cooled sleeve body 3 that is sealed and supported on the furnace cover 1 by a sealing gasket and fitted onto the electrode 8. The water-cooled sleeve body 3 is composed of four or five circumferentially distributed segments connected by bolts. This embodiment uses four segments as an example. The inner side of the water-cooled sleeve body 3 is tubular, and the outer side is planar and annular to facilitate the installation of feed nozzles. Four arc-shaped feed inlets are evenly distributed circumferentially on the platform outside the water-cooled sleeve body 3, and each is fitted with a feed nozzle 2 for easy feeding.

[0022] A sealing copper ring 4 is installed on the water-cooling jacket 3. The sealing copper ring 4 includes a copper ring support 401 fixed to the upper end of the water-cooling jacket 3 by bolts. Two layers of copper rings 402 are arranged in the copper ring support 401. Each layer of copper rings 402 is formed by multiple fan-shaped copper blocks evenly distributed around the circumference and overlapping each other. The upper and lower layers of copper rings are staggered. An elastic pressing component is provided on the copper ring support 401 for each copper block to elastically press the copper block against the outer edge of the electrode 8.

[0023] The elastic clamping assembly includes a spring mounting sleeve 403 welded to a copper ring support 401, a pressure spring 404 provided inside the spring mounting sleeve 403, the inner end of the pressure spring 404 pressing against the corresponding copper block, and a limit cap 405 connected to the outer end of the spring mounting sleeve 403 by a thread to limit the pressure spring.

[0024] An annular sealing support 5 is bolted to the upper end of the copper ring support 401 of the sealing copper ring 4. The upper surface of the sealing support 5 is a conical surface. The sealing support 5 is composed of four circumferentially distributed segments, and adjacent segments are fixedly connected by bolts. A flexible sealing ring 6 is placed on the conical surface of the sealing support 5. The cross-section of the flexible sealing ring 6 is a right-angled triangle, and the hypotenuse falls on the conical surface of the sealing support 5. Multiple pressure blocks 7 are evenly distributed on the upper circumference of the flexible sealing ring 6. The pressure blocks 7 press on the long right-angled side of the flexible sealing ring 6, and there is a gap between two adjacent pressure blocks 7, so that the inner edge of the flexible sealing ring 6 is tightly attached to the outer edge of the electrode 8 under the pressure of the pressure blocks 7.

[0025] The flexible sealing ring 6 is composed of multiple circumferentially distributed rings joined together, with the end faces of adjacent rings overlapping at a 45-degree angle. The flexible sealing ring 6 is made of refractory ceramic fiber material.

[0026] The pressure blocks 7 are preferably 12 in number and made of 304 stainless steel. Each pressure block 7 has two handles 9 fixed near both ends to facilitate workers to carry and handle it by hand.

[0027] This application utilizes a double-sealing structure formed by the sealing copper ring 4 and the flexible sealing ring 6, resulting in a better sealing effect. When the electrode 8 shifts to one side, the electrode 8 will compress the corresponding flexible sealing ring 6, which slides upward along the conical surface of the sealing support 5. Meanwhile, the flexible sealing ring 6 on the other side, lacking lateral support from the electrode 8, will slide downward along the conical surface of the sealing support 5 under the pressure of the upper pressure block 7, until it adheres tightly to the side of the electrode 8. Similarly, when the flexible sealing ring 6 wears, it will also slide diagonally downward along the conical surface of the sealing support 5 until it adheres tightly to the side of the electrode 8. Regardless of whether the electrode 8 shifts or the flexible sealing ring 6 wears, the pressure of the flexible sealing ring 6 on the side of the electrode 8 remains constant, thus ensuring that the sealing performance is not weakened. Moreover, this pressure originates from the gravity of the upper pressure block 7, making it more uniform, stable, and reliable compared to other mechanical forces.

[0028] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A novel water-cooled sealing sleeve for a calcium carbide furnace, comprising a water-cooled sleeve body, wherein a sealing copper ring is installed on the water-cooled sleeve body, characterized in that: A sealing support is fixed at the upper end of the sealing copper ring. The upper surface of the sealing support is a conical surface. A flexible sealing ring is placed on the conical surface of the sealing support. The cross-section of the flexible sealing ring is a right triangle and the hypotenuse falls on the conical surface of the sealing support. Multiple pressure blocks are evenly distributed around the circumference of the flexible sealing ring. The inner edge of the flexible sealing ring is pressed tightly against the outer edge of the electrode under the pressure of the pressure blocks.

2. The novel water-cooled sealing sleeve for a calcium carbide furnace according to claim 1, characterized in that: The flexible sealing ring is composed of multiple rings evenly distributed around the circumference, and the end faces of two adjacent rings overlap each other at a 45-degree angle.

3. The novel water-cooled sealing sleeve for a calcium carbide furnace according to claim 2, characterized in that: The flexible sealing ring is made of refractory ceramic fiber material.

4. The novel water-cooled sealing sleeve for a calcium carbide furnace according to claim 1, characterized in that: There are 12 pressure blocks, and each pressure block is fixed with two handles to facilitate workers to carry and move it by hand.

5. A novel water-cooled sealing sleeve for a calcium carbide furnace according to claim 1, characterized in that: The sealing support is composed of four circumferentially distributed segments, with adjacent segments fixedly connected by bolts.

6. A novel water-cooled sealing sleeve for a calcium carbide furnace according to any one of claims 1-5, characterized in that: The sealing copper ring includes a copper ring support fixed on the water cooling jacket. Inside the copper ring support, there are two layers of copper rings arranged on the upper and lower sides. Each layer of copper rings is formed by overlapping multiple fan-shaped copper blocks evenly distributed around the circumference. On the copper ring support, there are elastic pressing components corresponding to each copper block, which are used to elastically press the copper block against the outer edge of the electrode.

7. A novel water-cooled sealing sleeve for a calcium carbide furnace according to claim 6, characterized in that: The water-cooled jacket is composed of four or five circumferentially distributed lobes connected by bolts. The inner side of the water-cooled jacket is tubular, and the outer side is a planar annular shape to facilitate the installation of the nozzle.

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