Water seal device for industrial furnaces

Abstract

To provide a water seal device for industrial furnaces that is highly durable and cost-effective. [Solution] An industrial furnace water seal device 1 seals the gap M between the fixed part 100 and the drive part 200 of the industrial furnace by sealing it with a first seal material 11 located on the fixed part 100 side and a second seal material 12 located on the drive part 200 side, and by hanging down the lower ends of the first seal material 11 and the second seal material 12 so as to be immersed in a water seal trough 20 filled with sealing liquid 21, wherein a material 30 capable of drawing up the sealing liquid 21 is attached to both the first seal material 11 and the second seal material 12.

Description

Technical Field

[0001] The present invention relates to a water seal device for an industrial furnace that seals the gap between the fixed part and the driving part of the industrial furnace using a water seal trough.

Background Art

[0002] In industrial furnaces for heat-treating steel-based, copper-based materials, etc. at high temperatures, furnace types and conveying methods such as the walking beam type, walking hearth type, rotary hearth type, etc. are adopted. In these furnaces, in order to maintain the atmosphere inside the furnace and prevent the ejection of high-temperature gas, it is common to block the gap between the fixed part and the driving part with a sealing device.

[0003] For example, like the water seal device 1 of the industrial furnace shown in FIG. 2, seal knives 11 and 12 are arranged as sealing materials on the fixed part 100 side and the driving part 200 side respectively, to block the gap M between the fixed part 100 and the driving part 200, and at the same time, the lower ends of the seal knives 11 and 12 are immersed in the water of the water seal trough 20 to seal the atmosphere inside the furnace, which is a common method.

[0004] Also, as shown in FIG. 3, in the walking beam method where materials can be conveyed one by one, it is necessary to support the moving beam that moves in a rectangular shape in the vertical and front-rear directions inside the furnace body from below and seal the post P that moves together with the moving beam. In such a case, a trough tank T filled with water L is provided directly below the opening S formed in the furnace floor to insert the moving post P, and the lower end of the seal box B suspended from the periphery of the opening of the furnace floor is positioned in the water L to prevent the leakage of gas inside the furnace body (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

[0006] However, when the furnace becomes hot, the surface temperature of the seal knives 11 and 12 increases, causing problems such as heat being released into the surroundings and adversely affecting the equipment, and the seal knives 11 and 12 themselves shortening their lifespan due to oxidation caused by the high temperature of the furnace atmosphere. Furthermore, if the material of the sealing knives 11 and 12 is made of stainless steel to ensure heat resistance, the cost will be higher compared to using general steel materials.

[0007] Furthermore, even in the conventional example shown in Figure 3, when the temperature inside the furnace becomes high, even if the lower end of the seal box B is immersed in the trough tank T, the seal box B itself becomes hot, resulting in heat being released into the surroundings.

[0008] Therefore, the objective of the present invention is to provide a water seal device for industrial furnaces that is highly durable and cost-effective. [Means for solving the problem]

[0009] To achieve the above objective, the present invention provides a water seal device for an industrial furnace that seals the gap (M) between the fixed part (100) and the drive part (200) of the industrial furnace with a first seal material (11) located on the fixed part (100) side and a second seal material (12) located on the drive part (200) side, and immerses the lower ends of the first seal material (11) and the second seal material (12) in a water seal trough (20) filled with a sealing liquid (21) to seal the gap (M), wherein the water seal device (1) for an industrial furnace seals the gap (M), The invention is characterized in that a material (30) capable of drawing up the sealing liquid (21) is attached to either one or both of the first sealing material (11) and the second sealing material (12).

[0010] Furthermore, the water seal device (1) for industrial furnaces of the present invention is characterized in that the first sealing material (11) and the second sealing material (12) are sealing knives, and their material is general steel.

[0011] Furthermore, the water seal device (1) for industrial furnaces of the present invention is characterized in that the sealing liquid (21) is water.

[0012] Furthermore, the water seal device (1) for industrial furnaces of the present invention is characterized in that the sealing liquid (21) is a non-flammable oil.

[0013] The symbols in parentheses above indicate the corresponding elements or items shown in the drawings and the embodiments for carrying out the invention described later. [Effects of the Invention]

[0014] The present invention provides a water seal device for industrial furnaces that seals the gap between the fixed part and the drive part of an industrial furnace by sealing it with a first seal material located on the fixed part side and a second seal material located on the drive part side, and by dangling the lower ends of the first seal material and the second seal material so as to be immersed in a water seal trough filled with sealing liquid. In this water seal device for industrial furnaces, a material capable of drawing up the sealing liquid is attached to either one or both of the first seal material and the second seal material, so that the first seal material or the second seal material is cooled by the drawn-up sealing liquid.

[0015] Materials capable of drawing up sealing fluid include, for example, ceramic fibers that automatically draw up the sealing fluid through capillary action, but other materials are also acceptable. In fact, any material that can automatically draw up the sealing fluid is acceptable, and it does not necessarily have to utilize capillary action.

[0016] By cooling the sealant with the absorbed sealing liquid, the sealant is prevented from becoming overheated, and as a result, the phenomenon of heat dissipation into the surroundings can be suppressed. This can prevent the deterioration of the sealing material due to oxidation caused by the high temperature of the furnace atmosphere, thereby improving the durability of the sealing material.

[0017] As the first sealing material and the second sealing material, a sealing knife is used and its material is made of general steel, which results in a lower cost compared to the case of stainless steel. That is, conventionally, stainless steel may be used considering heat resistance. However, since the first sealing material and the second sealing material are cooled by the sucked sealing liquid, the heat resistance of general steel is sufficient.

[0018] As the sealing liquid, water or non-flammable oil can be used. Water has the advantages of being inexpensive compared to non-flammable oil and being easy to use, but it has the disadvantage of evaporating. On the other hand, non-flammable oil can more reliably prevent the passage of gas inside the furnace body than water and can obtain better sealing performance.

[0019] Thus, the water-sealing device of an industrial furnace, in which a material capable of sucking up a sealing liquid is attached to a sealing material immersed in a water-sealing trough, is not described at all in the above-mentioned patent documents.

Brief Description of the Drawings

[0020] [Figure 1] It is a side sectional view showing the configuration of a water-sealing device of an industrial furnace according to an embodiment of the present invention. [Figure 2] It is a side sectional view showing the configuration of a water-sealing device of an industrial furnace according to a conventional example. [Figure 3] It is a side sectional view showing the configuration of another water-sealing device of an industrial furnace according to a conventional example.

Modes for Carrying Out the Invention

[0021] Referring to FIG. 1, the water-sealing device 1 of an industrial furnace according to an embodiment of the present invention will be described. As shown in FIG. 1, the water seal device 1 of the industrial furnace according to this embodiment closes the gap M between the fixed part 100 and the driving part 200 of the industrial furnace with a first sealing material 11 arranged on the fixed part 100 side and a second sealing material 12 arranged on the driving part 200 side. The first sealing material 11 and the second sealing material 12 are respectively suspended from the fixed part 100 and the driving part 200.

[0022] The lower ends of the first sealing material 11 and the second sealing material 12 are immersed in a water seal trough 20 filled with a sealing liquid 21. Water is used as the sealing liquid 21.

[0023] Sealing knives (sealing plates) are used as the first sealing material 11 and the second sealing material 12, and their upper parts are bolted to the fixed part 100 and the driving part 200 respectively. Stainless steel with excellent heat resistance is used as the material of the first sealing material 11 and the second sealing material 12.

[0024] And a material 30 that can suck up the sealing liquid 21 is attached to the first sealing material 11 and the second sealing material 12. More specifically, ceramic fiber is used as the material 30 and is pasted around the first sealing material 11 and the second sealing material 12 from the top to the bottom by an adhesive. The fixing method of the material 30 is not limited to pasting with an adhesive and may be pinning or the like. In particular, the lower part of the material 30 is immersed in the sealing liquid 21 of the water seal trough 20 together with the first sealing material 11 and the second sealing material 12.

[0025] In this way, by attaching a material to the first sealing material 11 and the second sealing material 12, the sealing liquid 21 in the water seal trough 20, here water, is sucked up by capillary action, and the first sealing material 11 and the second sealing material 21 are cooled. As a result, the first sealing material 11 and the second sealing material 12 are prevented from becoming hot, so the phenomenon that the first sealing material 11 and the second sealing material 12 radiate heat to the surroundings can be suppressed. According to this, oxidation caused by high temperatures in the furnace atmosphere can be prevented, which would shorten the lifespan of the first seal material 11 and the second seal material 12, thus improving the durability of the first seal material 11 and the second seal material 12.

[0026] In this embodiment, ceramic fiber was given as the material 30 capable of absorbing the sealing liquid 21, but any material 30 capable of absorbing the sealing liquid 21 may be used. For example, other than ceramic fiber, there are insulating sponges and heat-resistant cloths (fire-resistant cloths). Examples of these heat-resistant cloths include glass cloth, silica cloth, and alkali earth silicate wool.

[0027] Furthermore, in this embodiment, stainless steel was used as the material for the first seal material 11 and the second seal material 12 due to its excellent heat resistance. However, since the first seal material 11 and the second seal material 12 are cooled by the sealing liquid 21 drawn up through the material 30, they can also be replaced with general steel materials such as SS400. According to this, cheaper materials than stainless steel can be used, thus reducing costs. However, since general steel rusts (oxidizes) in water, stainless steel is superior in terms of durability.

[0028] Furthermore, while water was used as the sealing liquid 21, non-flammable oil can be used instead. Water has the advantage of being cheaper and easier to use compared to non-flammable oil, but it has the disadvantage of evaporating. Non-flammable oil can more reliably prevent the passage of gas inside the furnace than water, resulting in a better sealing performance. However, since non-flammable oil has less cooling effect due to the heat of vaporization from evaporation than water, water is preferable in this respect. [Explanation of Symbols]

[0029] 1. Water seal device for industrial furnaces 11. First sealing material 12. Second sealing material 20 Water-sealed trough 21 Sealing Liquid 30. Ceramic fiber (a material capable of absorbing sealing liquid) 100 Fixed part 200 Drive unit B Seal Box G Slide groove H insertion opening L water P Post S opening T-trough tank W - Material to be treated

Claims

1. A water seal device for an industrial furnace, which seals the gap between the fixed part and the drive part of the industrial furnace by sealing it with a first seal material located on the fixed part side and a second seal material located on the drive part side, and by suspending the lower ends of the first seal material and the second seal material so as to be immersed in a water seal trough filled with sealing liquid, thereby sealing the gap, A water seal device for an industrial furnace, characterized in that a material capable of drawing up the sealing liquid is attached to either one or both of the first sealing material and the second sealing material.

2. The water seal device for an industrial furnace according to claim 1, characterized in that the first seal material and the second seal material are seal knives and are made of general steel.

3. The water seal device for an industrial furnace according to claim 1 or 2, wherein the sealing liquid is water.

4. The water seal device for an industrial furnace according to claim 1 or 2, wherein the sealing liquid is a non-flammable oil.

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