Box-type resistance furnace for metal heat treatment

Abstract

The utility model discloses a box type resistance furnace for metal heat treatment, including box type resistance furnace body, the top surface and bottom of box type resistance furnace body are provided with the same group of circuitous type heating elbow pipe between the intercommunication, and the bottom of box type resistance furnace body is equipped with hot -blast circulation mechanism. The utility model discloses through circuitous type heating elbow pipe heating box type resistance furnace body, and by drive motor drives connecting rod and the simultaneous rotation of several fan blades on rotary lever, cooperate several arc fairlead and accelerate the hot air flow of box type resistance furnace body in circulation and circulation, and heating speed is fast, can realize fast heating and high -efficient heating, through the arc slot in the limiting seat of circuitous type heating elbow pipe and is inserted, and the arc limiting piece is inserted in the rectangular clamping groove on the opposite two locating blocks, and utilizes second bolt to fix the arc limiting piece on the locating block to a plurality of arc limiting piece cooperate arc slot to carry out the fast positioning of circuitous type heating elbow pipe, and the convenient replacement overhauls.

Description

Technical Field

[0001] This utility model relates to the field of box-type resistance furnace technology, and in particular to a box-type resistance furnace for metal heat treatment. Background Technology

[0002] Resistance furnaces heat metal workpieces by using resistance wires or resistance bands, combining radiant and conductive heating. The temperature is automatically adjusted by a temperature control system to ensure a stable and controllable heating process. They can be used for heat treatment processes such as quenching and normalizing of metal materials and are suitable for heat treatment of workpieces such as carbon steel and high-chromium steel.

[0003] Existing box-type resistance furnaces may cause uneven temperature inside the furnace when the heating rate is too fast during actual use, which will affect the heat treatment quality of the products. In addition, the heating elements inside the resistance furnace are inconvenient to disassemble and repair. A box-type resistance furnace for metal heat treatment is proposed to solve the above problems. Utility Model Content

[0004] In view of the shortcomings and defects in the prior art, this utility model proposes a box-type resistance furnace for metal heat treatment, which solves the technical problems in the prior art where the heating rate of the existing box-type resistance furnace is too fast, which may lead to uneven temperature inside the furnace, affecting the heat treatment quality of the product, and the heating elements inside the resistance furnace are inconvenient to disassemble and repair.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A box-type resistance furnace for metal heat treatment includes a box-type resistance furnace body. A set of meandering heating bends is connected between the top and bottom surfaces of the box-type resistance furnace body. A hot air circulation mechanism is provided on the bottom of the box-type resistance furnace body. Strip-shaped support seats are fixedly connected to the rear inner walls of the box-type resistance furnace body near the left and right sides. Limiting seats are fixedly connected to the side walls of the two strip-shaped support seats near the upper and lower ends. Positioning mechanisms are provided on the side walls of the four limiting seats facing the meandering heating bends.

[0006] Preferably, the hot air circulation mechanism includes a groove located at the bottom center of the box-type resistance furnace body. A drive motor is fixedly installed at the bottom center of the groove. The drive shaft of the drive motor is vertically upward. A connecting rod is fixedly connected to the upper end of the drive shaft. A double-groove pulley is coaxially fixedly connected to the connecting rod. U-shaped brackets are fixedly installed on the bottom of the groove near the left and right sides. A rotating rod is vertically rotatably mounted on each of the two U-shaped brackets. The lower ends of the two rotating rods are rotatably connected to the bottom of the groove. A single-groove pulley is coaxially fixedly connected to each of the two rotating rods. The two single-groove pulleys are connected to the double-groove pulley via belt drive. Several fan blades are fixedly installed at the upper ends of the connecting rod and the two rotating rods.

[0007] Preferably, the box-type resistance furnace body has rectangular slots on the bottom of both sides of the groove, both rectangular slots are connected to the groove, and protective covers are inserted into both rectangular slots. The protective covers are connected and fixed to the bottom of the rectangular slots by a number of first bolts.

[0008] Preferably, the positioning mechanism includes arc-shaped slots respectively provided on the front sidewalls of the four limiting seats. The meandering heating bend is inserted into the four arc-shaped slots. Positioning blocks are fixedly connected to the front sidewalls of the four limiting seats near the upper and lower ends. Rectangular slots are provided on the opposite sidewalls of the two positioning blocks on the same side. The same arc-shaped limiting piece is inserted into the two rectangular slots on the same side. A second bolt is provided between the two positioning blocks and the arc-shaped limiting piece. The two second bolts are threadedly connected to the limiting seats. The four arc-shaped limiting pieces are pressed against the meandering heating bend.

[0009] Preferably, the strip support base and the positioning block are both welded and fixed to the limiting base, and the arc-shaped limiting piece is a high-temperature resistant alloy product.

[0010] Preferably, a plurality of equally spaced arc-shaped guide plates are fixedly connected to the top surface of the box-type resistance furnace body, and the arc-shaped end faces of the plurality of arc-shaped guide plates are respectively arranged facing the inner walls of the left and right sides of the box-type resistance furnace body.

[0011] Compared with the prior art, the advantages of this utility model are as follows: 1. The box-type resistance furnace body is heated by a meandering heating bend tube, and several fan blades on the connecting rod and rotating rod are driven by a drive motor to rotate simultaneously. With the help of several arc-shaped guide plates, the hot air flow and circulation inside the box-type resistance furnace body is accelerated, resulting in fast heating speed and achieving rapid heating and high-efficiency heating.

[0012] 2. By inserting the meandering heating bend into the arc-shaped slot on the limiting seat, inserting the arc-shaped limiting piece into the rectangular slot on the two opposite positioning blocks, and fixing the arc-shaped limiting piece on the positioning block with the second bolt, several arc-shaped limiting pieces can work together with the arc-shaped slot to quickly position the meandering heating bend, making it convenient for disassembly and maintenance. Attached Figure Description

[0013] Figure 1 This is a perspective view of a box-type resistance furnace for metal heat treatment proposed in this utility model. Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 This is a schematic diagram showing the disassembled structure of the positioning mechanism of a box-type resistance furnace for metal heat treatment proposed in this utility model. Figure 5 This is a schematic diagram of the arc-shaped flow guide plate of a box-type resistance furnace for metal heat treatment proposed in this utility model.

[0014] In the diagram: 1 Box-type resistance furnace body, 2 Detour-type heating bend, 3 Strip support base, 4 Limiting seat, 5 Groove, 6 Drive motor, 7 Connecting rod, 8 Double groove pulley, 9 U-shaped bracket, 10 Rotating rod, 11 Single groove pulley, 12 Fan blade, 13 Rectangular slot, 14 Protective cover, 15 First bolt, 16 Arc-shaped slot, 17 Positioning block, 18 Rectangular slot, 19 Arc-shaped limiting piece, 20 Second bolt, 21 Arc-shaped guide plate. Detailed Implementation

[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-5A box-type resistance furnace for metal heat treatment includes a box-type resistance furnace body 1. A set of meandering heating bends 2 are connected between the top and bottom of the box-type resistance furnace body 1. A hot air circulation mechanism is provided on the bottom of the box-type resistance furnace body 1. The hot air circulation mechanism includes a groove 5 located at the bottom center of the box-type resistance furnace body 1. A drive motor 6 is fixedly installed on the bottom center of the groove 5. The drive shaft of the drive motor 6 is vertically upward. A connecting rod 7 is fixedly connected to the upper end of the drive shaft of the drive motor 6. A double-groove pulley 8 is coaxially fixedly connected to the connecting rod 7. U-shaped brackets 9 are fixedly installed on the bottom of the groove 5 near the left and right sides. Rotating rods 10 are vertically rotatably inserted through both U-shaped brackets 9. The lower ends of the moving rods 10 are rotatably connected to the bottom of the grooves 5. Single groove pulleys 11 are coaxially fixedly connected to both rotating rods 10. The two single groove pulleys 11 are connected to the double groove pulleys 8 by belt drive. Several fan blades 12 are fixedly installed on the upper ends of the connecting rod 7 and the two rotating rods 10. The drive motor 6 drives the connecting rod 7 and the double groove pulleys 8 to rotate, so that the rotation of the double groove pulleys 8 drives the two single groove pulleys 11 connected by belt drive to rotate. The rotation of the two single groove pulleys 11 drives the two coaxially connected rotating rods 10 to rotate smoothly under the support of the U-shaped bracket 9. Thus, the connecting rod 7 and the two rotating rods 10 drive the several fan blades 12 to rotate simultaneously, accelerating the circulation of hot gas in the box-type resistance furnace body 1.

[0018] The box-type resistance furnace body 1 has rectangular slots 13 on the bottom of both sides of the groove 5. Both rectangular slots 13 are connected to the groove 5. Protective covers 14 are inserted into both rectangular slots 13. The protective covers 14 are connected and fixed to the bottom of the rectangular slots 13 by several first bolts 15. Strip support seats 3 are fixedly connected to the rear inner wall of the box-type resistance furnace body 1 near the left and right sides. Limit seats 4 are fixedly connected to the side walls of the two strip support seats 3 near the upper and lower ends. The protective covers 14 are fixed in the rectangular slots 13 with several first bolts 15, which can provide protection for the hot air circulation mechanism without obstructing the airflow.

[0019] Each of the four limiting seats 4 has a positioning mechanism on its sidewall facing the meandering heating bend 2. The positioning mechanism includes arc-shaped slots 16 respectively located on the front sidewalls of the four limiting seats 4. The meandering heating bend 2 is inserted into the four arc-shaped slots 16. Positioning blocks 17 are fixedly connected to the front sidewalls of the four limiting seats 4 near their upper and lower ends. Rectangular slots 18 are provided on the opposite sidewalls of the two positioning blocks 17 on the same side. The same arc-shaped limiting piece 19 is inserted into the two rectangular slots 18 on the same side. A second bolt 20 passes through the two positioning blocks 17 and the arc-shaped limiting piece 19. Both second bolts 20 are threadedly connected to the limiting seats 4. The four arc-shaped limiting pieces 19 are pressed against and tightened against the meandering heating bend 2. The strip support 3 and the positioning blocks 17 are welded and fixed to the limiting seats 4. The meandering heating bend 2 is inserted into the arc-shaped slots 16 on the four limiting seats 4, and the four arc-shaped limiting pieces 19 are... The rectangular slots 18 on the two opposing positioning blocks 17 are inserted into the rectangular slots 18, and several second bolts 20 are respectively inserted through the positioning blocks 17 and the arc-shaped limiting plates 19, and the several second bolts 20 are fixed on the positioning blocks 17. This allows the arc-shaped limiting plates 19 made of high-temperature alloy products to cooperate with the arc-shaped slots 16 to quickly position the meandering heating bend 2, which is convenient for disassembly and maintenance. The arc-shaped limiting plates 19 are made of high-temperature alloy products. Several equally spaced arc-shaped guide plates 21 are fixedly connected to the top surface of the box-type resistance furnace body 1. The arc-shaped end faces of the several arc-shaped guide plates 21 are respectively set towards the inner walls of the left and right sides of the box-type resistance furnace body 1. When the several fan blades 12 rotate, they cooperate with the arc-shaped end faces of the several arc-shaped guide plates 21 on the left and right sides of the box-type resistance furnace body 1 to accelerate the flow and circulation of hot air in the box-type resistance furnace body 1. The heating speed is fast, and rapid heating and high-efficiency heating can be achieved.

[0020] In use, the meandering heating bend 2 is inserted into the arc-shaped slots 16 on the four limiting seats 4. Four arc-shaped limiting plates 19 are respectively inserted into the rectangular slots 18 on the opposing positioning blocks 17. Several second bolts 20 are respectively inserted through the positioning blocks 17 and the arc-shaped limiting plates 19, and fixed to the positioning blocks 17. This allows the arc-shaped limiting plates 19 of the high-temperature alloy products to quickly position the meandering heating bend 2 in conjunction with the arc-shaped slots 16, facilitating disassembly and maintenance. The meandering heating bend 2 is then used to heat the interior of the box-type resistance furnace body 1. The drive motor 6 drives the connecting rod 7 and the double-groove pulley 8 to rotate, which in turn drives the two single-groove pulleys 11 connected by belt drives to rotate. The rotation of the two single-groove pulleys 11 drives the two coaxially connected rotating rods 10 to rotate smoothly under the support of the U-shaped bracket 9. This causes the connecting rod 7 and the two rotating rods 10 to drive several fan blades 12 to rotate simultaneously. Together with the several arc-shaped guide plates 21 with their arc-shaped end faces facing the left and right sides of the box-type resistance furnace body 1, the hot air flow and circulation inside the box-type resistance furnace body 1 is accelerated, resulting in fast heating speed and achieving rapid heating and high-efficiency heating.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A box-type resistance furnace for metal heat treatment, comprising a box-type resistance furnace body (1), wherein the top and bottom surfaces of the box-type resistance furnace body (1) are connected by the same set of meandering heating bends (2), characterized in that, The bottom of the box-type resistance furnace body (1) is provided with a hot air circulation mechanism. The inner rear wall of the box-type resistance furnace body (1) near the left and right sides is fixedly connected with a strip support seat (3). The two strip support seats (3) are fixedly connected with limit seats (4) near the upper and lower ends of the side wall. The four limit seats (4) are provided with a positioning mechanism on the side wall facing the meandering heating bend (2).

2. The box-type resistance furnace for metal heat treatment according to claim 1, characterized in that, The hot air circulation mechanism includes a groove (5) located at the bottom of the center of the box-type resistance furnace body (1). A drive motor (6) is fixedly installed at the bottom of the center of the groove (5). The drive shaft of the drive motor (6) is vertically upward. A connecting rod (7) is fixedly connected to the upper end of the drive shaft of the drive motor (6). A double groove pulley (8) is coaxially fixedly connected to the connecting rod (7). U-shaped brackets (9) are fixedly installed on the bottom of the groove (5) near the left and right sides. Rotating rods (10) are vertically rotatably connected to the two U-shaped brackets (9). The lower ends of the two rotating rods (10) are rotatably connected to the bottom of the groove (5). A single groove pulley (11) is coaxially fixedly connected to the two rotating rods (10). The two single groove pulleys (11) are connected to the double groove pulley (8) by belt drive. Several fan blades (12) are fixedly installed at the upper ends of the connecting rod (7) and the two rotating rods (10).

3. The box-type resistance furnace for metal heat treatment according to claim 1, characterized in that, The box-type resistance furnace body (1) is provided with rectangular slots (13) on the bottom of both sides of the groove (5). Both rectangular slots (13) are connected to the groove (5). Both rectangular slots (14) are inserted into the two rectangular slots (13). The protective cover (14) is connected and fixed to the bottom of the rectangular slot (13) by several first bolts (15).

4. A box-type resistance furnace for metal heat treatment according to claim 1, characterized in that, The positioning mechanism includes arc-shaped slots (16) respectively set on the front sidewalls of four limiting seats (4). The meandering heating bend (2) is inserted into the four arc-shaped slots (16). Positioning blocks (17) are fixedly connected to the front sidewalls of the four limiting seats (4) near the upper and lower ends. Rectangular slots (18) are provided on the opposite sidewalls of the two positioning blocks (17) on the same side. The same arc-shaped limiting piece (19) is inserted into the two rectangular slots (18) on the same side. A second bolt (20) is provided between the two positioning blocks (17) and the arc-shaped limiting piece (19). The two second bolts (20) are threadedly connected to the limiting seats (4). The four arc-shaped limiting pieces (19) are pressed against the meandering heating bend (2).

5. A box-type resistance furnace for metal heat treatment according to claim 4, characterized in that, The strip support (3) and the positioning block (17) are both welded and fixed to the limiting seat (4), and the arc-shaped limiting piece (19) is a high-temperature resistant alloy product.

6. A box-type resistance furnace for metal heat treatment according to claim 1, characterized in that, The top surface of the box-type resistance furnace body (1) is fixedly connected with several equally spaced arc-shaped guide plates (21), and the arc-shaped end faces of the several arc-shaped guide plates (21) are respectively set towards the inner walls of the left and right sides of the box-type resistance furnace body (1).

Images