Fabricated furnace bottom roller for heat treatment furnace

Abstract

The utility model discloses an assembly type furnace bottom roller for a heat treatment furnace, which comprises a driving end shaft head, a roller and a conical sleeve which are sequentially arranged, the roller and the conical sleeve are in interference fit and are fixed by welding, and a plurality of flat keys for guiding are uniformly arranged on the non-driving end of the conical sleeve along the circumference. The conical sleeve and the roller are in interference fit and fixed through welding, assembling is facilitated, the cylindrical pins are additionally arranged on the circumference of the conical sleeve, manufacturing is easy, and supporting is firm; by arranging the lining, the machining difficulty of slotting the inner hole of the conical sleeve is reduced; the flat key is used for thermal expansion guiding sliding, the structure is simple, and disassembly is convenient. In conclusion, the utility model solves the problems of overlarge gap and guide deviation of the furnace bottom roller in high and low temperature environments, reduces the replacement cost of the furnace bottom roller, and prolongs the service life of the furnace bottom roller.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment furnaces, and in particular relates to an assembled furnace bottom roller for a heat treatment furnace. Background Art

[0002] The working temperature of stainless steel continuous annealing furnace is generally as high as about 1150℃. The stainless steel pipe is continuously annealed in the furnace. The operation of the steel pipe in the furnace is supported by high temperature resistant furnace bottom rollers.

[0003] After the existing supporting furnace bottom steel rollers have been used for a period of time, the tapered sleeve and the roller core expand and stretch at high temperature, resulting in wear between the roller core and the tapered sleeve, and the gap is too large. Since the roller sleeve has a guiding groove, the gap is too large, which can easily cause the steel pipe to deviate in direction during the heat treatment process and easily hit the inner wall of the furnace, causing the steel pipe to be downgraded to a secondary grade or judged as a waste pipe, which directly affects the product yield.

[0004] Aiming at the problem that the gap between existing steel rollers is too large in high temperature environment and the direction of steel pipes is offset during heat treatment in the furnace, the utility model proposes an assembled furnace bottom roller for a heat treatment furnace, which is used to solve the problem that the gap between steel rollers is too large and the guide is offset in high and low temperature environments. Utility Model Content

[0005] In view of the problems raised by the above background technology, the purpose of the utility model is to provide an assembled hearth roller for a heat treatment furnace.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] An assembled furnace bottom roller for a heat treatment furnace comprises a driving end shaft head, a roller and a tapered sleeve which are arranged in sequence. The roller and the tapered sleeve are interference fit and fixed by welding. A plurality of flat keys for guiding are evenly arranged along the circumference of the non-driving end of the tapered sleeve.

[0008] It is further defined that it also includes a cylindrical pin, which is arranged along the circumference of the conical sleeve and contacts the roller. With such a structural design, the cylindrical pin is easy to manufacture and can also provide support for the roller to prevent the conical sleeve from deforming under high temperature gap.

[0009] It is further defined that the number of the flat keys is at least 3. With such a structural design, the flat keys are used for guiding the sliding of thermal expansion, and the structure is simple and the disassembly is convenient, which can extend the service life of the furnace bottom roller.

[0010] It is further defined that it also includes a bushing, which is embedded in the tapered sleeve. Such a structural design can reduce the difficulty of processing the grooves in the inner hole of the tapered sleeve.

[0011] It is further defined that one end of the bushing abuts against the flat key, and the other end is provided with an exhaust groove.

[0012] Beneficial effects of the utility model:

[0013] 1. The conical sleeve and the roller of the utility model are made into interference fit and welded and fixed, which is convenient for assembly

[0014] 2. The utility model adds cylindrical pins on the circumference of the tapered sleeve, which is simple to manufacture and has firm support.

[0015] 3. The utility model adopts the bushing method to reduce the processing difficulty of grooving the inner hole of the tapered sleeve.

[0016] 4. The utility model adopts flat keys for thermal expansion and guiding sliding, which has a simple structure and is easy to disassemble.

[0017] In summary, the utility model solves the problems of excessive gap and guide deviation of the furnace bottom roller in high and low temperature environments, reduces the replacement cost of the furnace bottom roller, and prolongs the service life of the furnace bottom roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0019] Figure 1 This is a structural schematic diagram of an embodiment of an assembled furnace bottom roller for a heat treatment furnace of the utility model;

[0020] Figure 2 This is a structural schematic diagram of an embodiment of an assembled furnace bottom roller for a heat treatment furnace of the utility model;

[0021] Figure 3 This is a structural schematic diagram of an embodiment of an assembled furnace bottom roller for a heat treatment furnace of the utility model;

[0022] The symbols of the main components are explained as follows: drive end shaft head 1, roller 2, tapered sleeve 3, bushing 4, flat key 5, cylindrical pin 6. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model. It should be understood that the specific embodiments described here are only used to explain the present utility model and are not used to limit the present utility model.

[0026] like Figure 1 As shown, the utility model is an assembled hearth roller for a heat treatment furnace, comprising a driving end shaft head 1, a roller 2 and a tapered sleeve 3 arranged in sequence, the roller 2 and the tapered sleeve 3 are interference fit and fixed by welding, and a plurality of flat keys 5 for guiding are evenly arranged along the circumference on the non-driving end of the tapered sleeve 3.

[0027] The furnace bottom roller of the utility model is that the original roller core driving end is changed from gap fixed to interference fit between the roller core and the tapered sleeve 3 and fixed by welding, which is convenient for assembly, and then two groups of cylindrical pins 6 are arranged on the circumference of the tapered sleeve 3, the cylindrical pins 6 are in contact with the roller 2, and then the bushing 4 is embedded in the tapered sleeve 3, which can reduce the difficulty of machining the keyway due to the inner hole, and finally flat keys 5 for guiding are evenly distributed on the circumference of the non-driving end of the tapered sleeve 3, and the flat keys 5 can be used for thermal expansion and sliding, thereby extending the service life of the furnace bottom roller.

[0028] like Figure 3 As shown, preferably, it also includes a cylindrical pin 6, which is arranged along the circumference of the tapered sleeve 3, and the cylindrical pin 6 is in contact with the roller 2. With such a structural design, the cylindrical pin is easy to manufacture, and the cylindrical pin can also provide support for the roller to prevent the tapered sleeve from deforming under high temperature gap.

[0029] like Figure 2 As shown, preferably, the number of the flat keys 5 is at least 3. With such a structural design, the flat keys are used for guiding the sliding of thermal expansion, and the structure is simple and easy to disassemble, which can extend the service life of the furnace bottom roller.

[0030] like Figure 2As shown, preferably, it further comprises a bushing 4, which is embedded in the tapered sleeve 3. Such a structural design can reduce the difficulty of processing the grooves in the inner hole of the tapered sleeve.

[0031] like Figure 2 As shown, preferably, one end of the bushing 4 abuts against the flat key 5, and the other end is provided with an exhaust groove.

[0032] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An assembled hearth roller for a heat treatment furnace, characterized in that: The invention comprises a driving end shaft head (1), a roller (2) and a tapered sleeve (3) which are arranged in sequence. The roller (2) and the tapered sleeve (3) are interference fit and fixed by welding. A plurality of flat keys (5) for guiding are evenly arranged along the circumference on the non-driving end of the tapered sleeve (3).

2. The assembled hearth roller for a heat treatment furnace according to claim 1, characterized in that: It also comprises a cylindrical pin (6), which is arranged along the circumference of the conical sleeve (3) and is in contact with the roller (2).

3. The assembled hearth roller for a heat treatment furnace according to claim 1, characterized in that: The number of the flat keys (5) is at least 3.

4. The assembled hearth roller for a heat treatment furnace according to claim 1, characterized in that: It also comprises a bushing (4), wherein the bushing (4) is embedded in the conical sleeve (3).

5. The assembled hearth roller for a heat treatment furnace according to claim 4, characterized in that: One end of the bushing (4) abuts against the flat key (5), and the other end is provided with an exhaust groove.

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