Ceramic heat insulation sleeve for heating furnace roller way

Abstract

The utility model discloses a ceramic heat insulation sleeve for a heating furnace roller way, which is sleeved on a roller shaft of the heating roller way and comprises ceramic heat insulation sleeve bodies with Haff structures, positioning components are arranged on contact surfaces of the two ceramic heat insulation sleeve bodies, and after the two ceramic heat insulation sleeve bodies are mutually buckled, the positioning components are embedded and positioned; a positioning ring is arranged on the roller shaft, and a positioning ring groove is formed in the inner circumferential surface of the ceramic body; after the two ceramic heat insulation sleeve bodies are buckled, the positioning ring is embedded into the positioning ring groove, the two ceramic heat insulation sleeve bodies are fixedly connected, the two ceramic heat insulation sleeve bodies are buckled and wrapped on the roll shaft, and through the heat insulation performance of the ceramic heat insulation sleeve bodies, compared with the heat transfer speed of special steel directly making contact with the roll shaft, the heat transfer speed of the roll shaft is increased. The ceramic heat insulation sleeve body can obviously reduce the heat transfer speed and obviously reduce the loss of the surface temperature of the special steel, so that the temperature difference between the surface and the core part of the special steel is reduced to the maximum extent, and the quality of the special steel is improved under the condition that the cost is controlled to the maximum extent.

Description

Technical Field

[0001] The utility model belongs to the technical field, and specifically relates to a ceramic heat insulating sleeve for a roller table of a heating furnace. Background Art

[0002] For some high-end steel grades, during the transmission through the roller, if the traditional ordinary steel roller is used, the surface will be affected by the external environment and the temperature will drop, resulting in a difference between the surface temperature and the core temperature, resulting in product quality not meeting the requirements. Therefore, one of the methods currently used is to heat the roller, and the other is to insulate or keep the roller warm to ensure that the temperature difference between the surface temperature and the core temperature of the steel is as small as possible, thereby improving the quality of high-end steel grades. At present, the implementation method of roller heating is costly and the equipment is relatively complex, which often significantly increases the production cost of the corresponding steel grade and increases the equipment investment pressure of the enterprise. For this reason, more companies give priority to improving product quality as much as possible while keeping costs under control through insulation and heat preservation. Summary of the invention

[0003] The utility model aims to provide a ceramic heat insulating sleeve for a roller table of a heating furnace, which is intended to solve the problem of heat insulation of the heating roller existing in the background technology.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved as follows:

[0005] A ceramic insulation sleeve for a heating furnace roller, which is sleeved on the roller shaft of the heating roller, comprises a ceramic insulation sleeve body of a half structure, and a positioning assembly is arranged on the contact surface of the two ceramic insulation sleeve bodies, and after the two ceramic insulation sleeve bodies are buckled together, the positioning assembly is engaged and positioned; a positioning ring is arranged on the roller shaft, and a positioning ring groove is arranged on the inner circumferential surface of the ceramic insulation sleeve body; after the two ceramic insulation sleeve bodies are buckled together, the positioning ring is embedded in the positioning ring groove, and the two ceramic insulation sleeve bodies are fixedly connected.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the contact surfaces of the two ceramic insulation sleeves are bonded by a ceramic inorganic adhesive.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: an annular groove is opened on the peripheral surface of the ceramic insulation sleeve, and the annular groove is filled with a mixture of glass fiber and ceramic inorganic adhesive.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the positioning component includes positioning ridges and positioning grooves respectively arranged on two cut surfaces of the ceramic insulation sleeve; the positioning ridges and positioning grooves on the two ceramic insulation sleeves are centrally symmetrical to each other.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the cross-section of the positioning ridge and the positioning groove is any of semicircular, triangular or trapezoidal.

[0010] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects: by setting a ceramic insulation sleeve of a half structure, the two are buckled together to achieve coating on the roller shaft, so that through the insulation performance of the ceramic insulation sleeve itself, the ceramic insulation sleeve can significantly reduce the heat transfer rate relative to the heat transfer rate of the special steel directly in contact with the roller shaft, that is, it can significantly reduce the loss of surface temperature of the special steel, thereby maximizing the reduction of the temperature difference between the surface and the core of the special steel, and improving the quality of the special steel under the condition of maximizing cost control. By setting a positioning ring on the roller shaft and a positioning ring groove on the inner circumference of the ceramic insulation sleeve, the ceramic insulation sleeve can be axially positioned to avoid axial movement of the ceramic insulation sleeve due to external force during operation; the ceramic inorganic adhesive bonding enables the ceramic insulation sleeve to achieve fixed connection, so that it can better adapt to high temperature environment and achieve long-term stable and reliable connection; the setting of the positioning component improves the buckling positioning accuracy and convenience of the two ceramic insulation sleeves. In addition, an annular groove is arranged on the outer peripheral surface of the ceramic thermal insulation sleeve, and the annular groove is filled with a mixture of glass fiber and ceramic inorganic adhesive, which further improves the connection strength and connection reliability of the two ceramic thermal insulation sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of a ceramic thermal insulation sleeve;

[0012] Figure 2 This is the front view of the ceramic insulation sleeve;

[0013] Figure 3 This is the left side view of the ceramic insulation sleeve;

[0014] Figure 4 It is a schematic diagram of the three-dimensional structure of a ceramic thermal insulation sleeve;

[0015] Figure 5 It is a three-dimensional schematic diagram of the ceramic insulation sleeve from another angle;

[0016] Figure 6 It is a schematic diagram of the roller structure;

[0017] Figure 7 It is a three-dimensional diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of this application clearer, the technical solution in the embodiment will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is only a part of the embodiment of this application, not all embodiments. Based on the given embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0019] In the description of the present application, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] In the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0021] See Figure 1-7 As shown, the present application discloses a ceramic insulation sleeve for a heating furnace roller, which is sleeved on the roller shaft 30 of the heating roller; Figure 1-5 As shown, the ceramic insulation sleeve 10 includes a ceramic insulation sleeve body 11 with a Hough structure. The ceramic insulation sleeve body with the Hough structure is provided and the two are buckled together to achieve coating on the roller shaft. Therefore, through the insulation performance of the ceramic insulation sleeve body itself, the ceramic insulation sleeve body can significantly reduce the heat transfer rate compared with the heat transfer rate of the special steel directly contacting the roller shaft. That is to say, the loss of the surface temperature of the special steel can be significantly reduced, thereby maximally reducing the temperature difference between the surface and the core of the special steel, and improving the quality of the special steel under the condition of maximizing cost control; considering that during the operation, the ceramic insulation is caused by external force The edge sleeve 10 moves axially relative to the roller shaft 30. For this reason, in this embodiment, a positioning ring 31 is preferably provided on the roller shaft 30, and a positioning ring groove 114 is provided on the inner circumference of the ceramic insulation sleeve 11; after the two ceramic insulation sleeves 11 are buckled, the positioning ring 31 is embedded in the positioning ring groove 114, and the two ceramic insulation sleeves 11 are fixedly connected. In this embodiment, the contact surfaces of the two ceramic insulation sleeves 11 are preferably bonded by a ceramic inorganic adhesive. The ceramic inorganic adhesive is rigid and hard after bonding, and the temperature resistance range of the ceramic inorganic adhesive is usually between 600-1750 degrees Celsius, which can better adapt to high temperature environments. In this embodiment, the ceramic insulation sleeve is set as a Hough structure, so that the ceramic insulation sleeve 10 can be obtained after the ceramic insulation sleeves 11 are buckled and connected, which is easier to assemble.

[0022] Furthermore, a positioning assembly is provided on the contact surface of the two ceramic insulation sleeves 11, and after the two ceramic insulation sleeves 11 are buckled together, the positioning assembly is engaged and positioned; specifically, the positioning assembly includes positioning ridges 112 and positioning grooves 113 respectively provided on the two cut surfaces of the ceramic insulation sleeves 11; the positioning ridges 112 and positioning grooves 113 on the two ceramic insulation sleeves 11 are centrally symmetrical to each other. And preferably, the cross-sections of the positioning ridges 112 and the positioning grooves 113 are semicircular, triangular or trapezoidal, so that after the two ceramic insulation sleeves are buckled together, the positioning ridges 112 and the positioning grooves 113 are engaged with each other. Therefore, the provision of the positioning assembly improves the buckling positioning accuracy and convenience of the two ceramic insulation sleeves.

[0023] Considering that the ceramic insulation sleeve 10 will inevitably run for a long time during the production process, in order to further improve its connection strength, the present embodiment preferably has an annular groove 111 on the outer circumference of the ceramic insulation sleeve body 11, and a mixed filler 20 of glass fiber and ceramic inorganic adhesive is arranged in the annular groove 111. Specifically, a glass fiber cloth of appropriate width can be used to clean the ceramic inorganic adhesive and then be wound in the annular groove 111; the height of the glass fiber cloth can be considered to be higher than the depth of the annular groove 111, that is, the wound glass fiber cloth is slightly higher than the height of the outer circumference of the ceramic insulation sleeve body, and then the outer circumference of the ceramic insulation sleeve 10 is finely ground by an external cylindrical grinder with the roller shaft as the reference, so as to improve the smoothness of its outer circumference and the coaxiality of the ceramic insulation sleeve 10 and the roller shaft. Of course, it should be noted that before the ceramic insulating sleeve is fastened, a ceramic inorganic adhesive is first applied to the fastening surface of the ceramic insulating sleeve, and then after fastening, the two halves of the ceramic insulating sleeve are pressed together by an external pressing device (such as a press, etc.), and then removed after solidification; of course, in this process, the glass fiber cloth can be moistened with the ceramic inorganic adhesive and then wrapped in the annular groove 111 to better press the two ceramic insulating sleeves together through the glass fiber cloth and maintain the subsequent connection strength. It should be noted that Figure 7 The height of the glass fiber and ceramic inorganic binder mixed filler 20 indicated by the reference numeral 20 is slightly lower than the outer peripheral surface of the ceramic insulation sleeve 11. It is only for the convenience of its position display and is not the ultimate limitation of its height.

[0024] Of course, the ceramic insulation sleeve 11 can be formed by prefabricating a mold shell with a combined structure, pouring the slurry of the ceramic insulation material into the inner cavity formed by the mold shell, and drying and forming it. Of course, depending on the composition of the different ceramic insulation material slurries, sintering may also be required; the specific slurry composition and molding process of the ceramic insulation material are existing technologies and will not be repeated here.

[0025] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ceramic insulation sleeve for a heating furnace roller table, characterized in that: It is sleeved on the roller shaft (30) of the heating roller, the ceramic insulation sleeve (10) comprises a ceramic insulation sleeve body (11) of a half structure, and a positioning component is arranged on the contact surface of the two ceramic insulation sleeve bodies (11), and after the two ceramic insulation sleeve bodies (11) are buckled together, the positioning component is engaged and positioned; a positioning ring (31) is arranged on the roller shaft (30), and a positioning ring groove (114) is arranged on the inner peripheral surface of the ceramic insulation sleeve body (11); after the two ceramic insulation sleeve bodies (11) are buckled together, the positioning ring (31) is embedded in the positioning ring groove (114), and the two ceramic insulation sleeve bodies (11) are fixedly connected.

2. The ceramic insulation sleeve for a heating furnace roller according to claim 1, characterized in that: The contact surfaces of the two ceramic heat-insulating sleeves (11) are bonded together by a ceramic inorganic adhesive.

3. The ceramic insulation sleeve for a heating furnace roller according to claim 1, characterized in that: An annular groove (111) is provided on the outer peripheral surface of the ceramic heat-insulating sleeve (11), and a mixture of glass fiber and ceramic inorganic adhesive is filled in the annular groove (111).

4. The ceramic insulation sleeve for a heating furnace roller according to claim 1, characterized in that: The positioning assembly comprises positioning ridges (112) and positioning grooves (113) respectively arranged on two cut surfaces of the ceramic thermal insulation sleeve (11); the positioning ridges (112) and the positioning grooves (113) on the two ceramic thermal insulation sleeves (11) are centrally symmetrical to each other.

5. The ceramic insulation sleeve for a heating furnace roller table according to claim 4, characterized in that: The cross-sections of the positioning ridge (112) and the positioning groove (113) are any of semicircular, triangular or trapezoidal.

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