Continuous annealing furnace for nuclear power bolt production

Abstract

The invention relates to the technical field of high-strength bolt production, and provides a continuous annealing furnace for nuclear power bolt production, which comprises an annealing box, a plurality of radiant tube heaters, a batch discharging mechanism, a blanking mechanism, a cooling mechanism and a conveying mechanism, each radiant tube heater is installed in the annealing box, the batch discharging mechanism comprises a discharging rod which is arranged in the annealing box, the number of the discharging mechanisms is multiple, each discharging mechanism comprises a discharging steel belt which is arranged on the annealing box, the cooling mechanism is installed in the annealing box, the cooling mechanism comprises a refrigerator which is arranged in the annealing box, and the discharging rod is arranged in the annealing box. The conveying mechanism is installed in the annealing box, the conveying mechanism comprises a conveying steel belt, the conveying steel belt is arranged in the annealing box, and by means of the technical scheme, the problem that in the prior art, high-strength bolts of different specifications are not convenient to anneal at the same time is solved.

Description

Technical Field

[0001] The invention relates to the technical field of high-strength bolt production, and in particular to a continuous annealing furnace for nuclear power bolt production. Background Art

[0002] The bolts used in nuclear power equipment have high usage requirements, so the design of the durability and service life of the bolts is also very strict. After the bolts are produced, they need to be annealed to enhance the strength of the bolts.

[0003] Annealing is a metal heat treatment process, which means slowly heating the metal to a certain temperature, maintaining it for a certain period of time, and then cooling it at an appropriate rate. The purpose is to eliminate residual stress, eliminate work hardening, improve plastic processing properties, and prepare the organization for subsequent processing. To be precise, annealing is a heat treatment process for materials, including metal materials and non-metallic materials, and the annealing purpose of new materials is also different from that of traditional metal annealing.

[0004] When the existing continuous annealing furnace anneals the bolts, it is necessary to adjust the annealing temperature of the bolts according to the size of the bolts. Since the annealing temperatures required for bolts of different sizes are different, it is not easy to adapt the annealing temperature to the bolts of different specifications for simultaneous annealing when bolts of different specifications need to be annealed simultaneously. If the annealing temperature is adapted to the larger specifications of the bolts, the smaller specifications of the bolts will be damaged by the annealing temperature that is not adapted to themselves. If the annealing temperature of the continuous annealing furnace is adapted to the smaller specifications of the bolts, the larger specifications of the bolts will not be completely annealed by the heat, which is likely to cause the annealing effect of the larger specifications of the bolts. Therefore, we propose a continuous annealing furnace for the production of nuclear power bolts. Summary of the invention

[0005] The present invention provides a continuous annealing furnace for nuclear power bolt production, which solves the problem in the related art that it is inconvenient to simultaneously anneal high-strength bolts of different specifications.

[0006] The technical scheme of the present invention is as follows: A continuous annealing furnace for nuclear power bolt production, comprising an annealing box, the annealing box is provided with a feed inlet and a discharge inlet, and further comprising: a radiant tube heater, a batch discharge mechanism, a feed unloading mechanism, a cooling mechanism and a conveying mechanism;

[0007] The radiation tube heaters are provided in a plurality, and each of the radiation tube heaters is installed in the annealing box;

[0008] The batch discharging mechanism is provided in a plurality of pieces, and the batch discharging mechanism is installed in the annealing box. The batch discharging mechanism comprises a discharging rod, and the discharging rod is provided in the annealing box for discharging the high-strength bolts after annealing;

[0009] The unloading mechanism is provided in a plurality of pieces, and the unloading mechanism is installed in the annealing box. The unloading mechanism comprises an unloading steel belt, and the unloading steel belt is provided on the annealing box and is used to unload the high-strength bolts after annealing slowly.

[0010] The cooling mechanism is installed in the annealing box, and the cooling mechanism includes a refrigerator, which is arranged in the annealing box and is used to adaptively cool the high-strength bolts after annealing;

[0011] The conveying mechanism is installed in the annealing box, and the conveying mechanism includes a conveying steel belt, which is arranged in the annealing box and is used to convey the high-strength bolts.

[0012] Preferably, the batch discharging mechanism further comprises: a slide, a driving rod, a driving frame, a first motor and a force-bearing plate;

[0013] The slide is fixedly connected in the annealing box, two sliders are fixedly connected in the slide, the discharging rod is rotatably connected between the two sliders, and two push plates are fixedly connected to the discharging rod;

[0014] The driving rod is rotatably connected in the annealing box, and the bottom end of the driving rod is rotatably connected in the discharging rod. A sliding groove is provided on the driving rod, and a driving block is slidably connected in the sliding groove.

[0015] One end of the driving frame is rotatably connected to the driving block;

[0016] The first motor is installed on the annealing box, and the output end of the first motor is fixedly connected to the other end of the driving frame;

[0017] The force-bearing plate is fixedly connected in the annealing box, and the conveying steel belt is in contact with the force-bearing plate.

[0018] Furthermore, the unloading mechanism further comprises: an unloading rack, an unloading shaft, a second motor and a buffer rod;

[0019] The unloading rack is fixedly connected to the annealing box, and the annealing box is provided with an unloading port, and a discharge door is hinged at the unloading port;

[0020] The two material discharge shafts are provided, and both material discharge shafts are rotatably connected in the material discharge rack;

[0021] The second motor is mounted on the unloading frame, and the output end of the second motor passes through the unloading frame and is fixedly connected to one of the unloading shafts;

[0022] The buffer rods are arranged in a plurality, and each of the buffer rods is fixedly connected to the blanking steel belt.

[0023] Furthermore, the cooling mechanism further comprises: a lifting plate, a third motor and a fan;

[0024] The lifting plate is slidably connected in the annealing box, and the refrigerator is installed on the lifting plate;

[0025] The third motor is installed on the annealing box, the output end of the third motor passes through the annealing box and is fixedly connected with a lifting screw, a screw hole is opened on the lifting plate, and the lifting screw is threadedly connected to the lifting screw;

[0026] The fan is installed on the annealing box, and the output end of the fan faces the refrigerator.

[0027] Preferably, in the above scheme, the conveying mechanism further comprises: a conveying frame, a conveying shaft and a fourth motor;

[0028] The conveying racks are provided in two pieces, and the two conveying racks are fixedly connected to the feed inlet and the discharge outlet;

[0029] The conveying shafts are provided in two numbers, and the two conveying shafts are rotatably connected in the two conveying frames respectively;

[0030] The fourth motor is installed on one of the conveying frames, and the output end of the fourth motor passes through the conveying frame and is fixedly connected to one of the conveying shafts.

[0031] In the aforementioned solution, further, two baffles are fixedly connected to the two conveying shafts, and the conveying steel belt is arranged between the two baffles.

[0032] The working principle and beneficial effects of the present invention are:

[0033] 1. In the present invention, the first motor installed on the annealing box drives the driving frame to rotate, thereby driving the driving block rotatably connected to the driving frame to slide in the slide groove, thereby driving the driving rod to rotate in the annealing box, thereby driving the discharging rod rotatably connected between the two sliders to rotate and slide, thereby discharging the annealed high-strength bolts;

[0034] 2. In the present invention, the second motor installed on the unloading frame drives the unloading shaft to rotate, thereby driving the unloading steel belts connected between the two unloading shafts to rotate, thereby driving the buffer rods fixedly connected to the unloading steel belts to support the high-strength bolts to unload slowly, thereby effectively preventing the threads on the high-strength bolts from falling off quickly, thereby preventing the threads from being damaged by collision;

[0035] 3. In the present invention, cold air is emitted by a refrigerator installed on the lifting plate, and the cold air is blown onto the annealed high-strength bolts by a fan installed on the annealing box, and the lifting screw is driven to rotate by a third motor installed on the annealing box, thereby driving the lifting plate to be raised and lowered, thereby adjusting the cooling distance of the annealed high-strength bolts, and thus the cooling speed.

[0036] Compared with the prior art, the equipment is convenient for simultaneously annealing high-strength bolts of different specifications, ensures the strength of high-strength bolts of different specifications during simultaneous annealing, and improves the annealing efficiency of high-strength bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0039] Figure 2 It is a schematic diagram of a three-dimensional structure of the present invention in cross section;

[0040] Figure 3 It is a three-dimensional structural schematic diagram of the batch discharging mechanism of the present invention;

[0041] Figure 4 It is a three-dimensional structural schematic diagram of the cooling mechanism of the present invention;

[0042] Figure 5 It is a three-dimensional structural schematic diagram of the blanking mechanism of the present invention;

[0043] Figure 6 It is a three-dimensional structural schematic diagram of the conveying mechanism of the present invention;

[0044] Figure 7 For the present invention Figure 3 Schematic diagram of the three-dimensional structure at A in the middle.

[0045] In the figure: 1, annealing box; 2, radiant tube heater; 3, discharge rod; 4, discharge steel belt; 5, refrigerator; 6, conveyor steel belt; 7, slide; 8, slider; 9, push plate; 10, drive rod; 11, drive block; 12, drive frame; 13, first motor; 14, force plate; 15, discharge rack; 16, discharge door; 17, discharge shaft; 18, second motor; 19, buffer rod; 20, lifting plate; 21, third motor; 22, lifting screw; 23, fan; 24, conveyor rack; 25, conveyor shaft; 26, fourth motor; 27, baffle. DETAILED DESCRIPTION

[0046] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] This embodiment proposes a continuous annealing furnace for nuclear power bolt production, comprising an annealing box 1, the annealing box 1 is provided with a feed port and a discharge port, and further comprising: a radiant tube heater 2, a batch discharge mechanism, a feed unloading mechanism, a cooling mechanism and a conveying mechanism, wherein the radiant tube heater 2 is provided in a plurality of pieces, and each of the radiant tube heaters 2 is installed in the annealing box 1;

[0048] The batch discharging mechanism is provided with several pieces, and the batch discharging mechanism is installed in the annealing box 1. The batch discharging mechanism includes a discharging rod 3, and the discharging rod 3 is arranged in the annealing box 1, and is used for discharging the high-strength bolts after annealing. The batch discharging mechanism also includes: a slide 7, a driving rod 10, a driving frame 12, a first motor 13 and a force plate 14. The slide 7 is fixedly connected in the annealing box 1, and two sliders 8 are fixedly connected in the slide 7. The discharging rod 3 is rotatably connected between the two sliders 8. The discharging rod 3, two push plates 9 are fixedly connected, the driving rod 10 is rotatably connected in the annealing box 1, the bottom end of the driving rod 10 is rotatably connected in the discharging rod 3, a slide groove is provided on the driving rod 10, a driving block 11 is slidably connected in the slide groove, one end of the driving frame 12 is rotatably connected to the driving block 11, the first motor 13 is installed on the annealing box 1, the output end of the first motor 13 is fixedly connected to the other end of the driving frame 12, the force plate 14 is fixedly connected in the annealing box 1, and the conveying steel belt 6 is in contact with the force plate 14;

[0049] Among them, the first motor 13 installed on the annealing box 1 drives the driving frame 12 to rotate, and then drives the driving block 11 rotatably connected to the driving frame 12 to slide in the slide groove, and then drives the driving rod 10 to rotate on the annealing box 1, and then drives the discharging rod 3 rotatably connected to the bottom end of the driving rod 10 to move, and then drives the discharging rod 3 to rotate between the two sliders 8, and at the same time drives the two sliders 8 to slide in the slide 7, so that the annealed high-strength bolts are discharged in batches.

[0050] The unloading mechanism is provided in a plurality of pieces, and the unloading mechanism is installed in the annealing box 1. The unloading mechanism includes an unloading steel belt 4, and the unloading steel belt 4 is provided on the annealing box 1, and is used to slowly unload the high-strength bolts after annealing and discharging. The unloading mechanism also includes: an unloading frame 15, an unloading shaft 17, a second motor 18 and a buffer rod 19. The unloading frame 15 is fixedly connected to the annealing box 1, and a unloading port is provided on the annealing box 1, and a discharge door 16 is hinged at the unloading port. The unloading shaft 17 is provided in two pieces, and the two unloading shafts 17 are rotatably connected in the unloading frame 15. The second motor 18 is installed in the unloading frame 15, and the output end of the second motor 18 passes through the unloading frame 15 and is fixedly connected to one of the unloading shafts 17. The buffer rod 19 is provided in a plurality of pieces, and each of the buffer rods 19 is fixedly connected to the unloading steel belt 4;

[0051] Among them, when the high-strength bolts are pushed to the unloading port, the second motor 18 installed on the unloading frame 15 drives the unloading shaft 17 to rotate, thereby driving the unloading steel belt 4 connected between the two unloading shafts 17 to transmit, and then driving the buffer rod 19 fixedly connected to the unloading steel belt 4 to move, thereby supporting the annealed high-strength bolts for slow unloading, thereby effectively preventing the high-strength bolts from being unloaded too quickly and preventing the threads on the high-strength bolts from being damaged by bumps.

[0052] The cooling mechanism is installed in the annealing box 1, and the cooling mechanism includes a refrigerator 5. The refrigerator 5 is arranged in the annealing box 1 and is used to adaptively cool the high-strength bolts after annealing. The cooling mechanism also includes: a lifting plate 20, a third motor 21 and a fan 23. The lifting plate 20 is slidably connected in the annealing box 1, and the refrigerator 5 is installed on the lifting plate 20. The third motor 21 is installed on the annealing box 1. The output end of the third motor 21 passes through the annealing box 1 and is fixedly connected with a lifting screw 22. The lifting plate 20 is provided with a screw hole, and the lifting screw 22 is threadedly connected to the lifting screw 22. The fan 23 is installed on the annealing box 1, and the output end of the fan 23 faces the refrigerator 5;

[0053] Among them, after annealing high-strength bolts with larger specifications, due to their large specifications and volume, the cooling speed will also be slower. Therefore, it is necessary to distribute cold air through the refrigerator 5 installed on the lifting plate 20, and blow the cold air distributed by the refrigerator 5 to the high-strength bolts through the fan 23 installed on the annealing box 1, and drive the lifting screw 22 to rotate through the third motor 21 installed on the annealing box 1, thereby driving the lifting plate 20 to be raised and lowered, thereby adjusting the distance between the refrigerator 5 and the high-strength bolts, and then adaptively cooling the high-strength bolts.

[0054] The conveying mechanism is installed in the annealing box 1, and the conveying mechanism includes a conveying steel belt 6, which is arranged in the annealing box 1 and is used to convey high-strength bolts. The conveying mechanism also includes: a conveying frame 24, a conveying shaft 25 and a fourth motor 26. The conveying frame 24 is provided in two, and the two conveying frames 24 are fixedly connected at the feed port and the discharge port. The conveying shaft 25 is provided in two, and the two conveying shafts 25 are respectively rotatably connected in the two conveying frames 24. The fourth motor 26 is installed on one of the conveying frames 24, and the output end of the fourth motor 26 passes through the conveying frame 24 and is fixedly connected to one of the conveying shafts 25;

[0055] The conveying shaft 25 is driven to rotate by the fourth motor 26 installed on the conveying frame 24, thereby driving the conveying steel belt 6 connected between the two conveying shafts 25 to rotate, thereby conveying high-strength bolts of different specifications.

[0056] Two baffles 27 are fixedly connected to the two conveying shafts 25 , and the conveying steel belt 6 is arranged between the two baffles 27 to prevent the conveying steel belt 6 from deviating during conveyance.

[0057] In this embodiment, when it is necessary to anneal high-strength bolts of different specifications at the same time, the high-strength bolts of different specifications are placed on the conveyor steel belt 6 in batches, and the conveyor shaft 25 is driven to rotate by the fourth motor 26 installed on the conveyor frame 24, thereby driving the conveyor steel belt 6 connected by the transmission between the two conveyor shafts 25 to slowly convey the high-strength bolts of different specifications into the annealing box 1, and the high-strength bolts are annealed by the radiation tube heater 2 installed in the annealing box 1. The heating time of high-strength bolts of different specifications is also different, and the heating time of high-strength bolts of smaller specifications is also shorter. Therefore, in the case of high-strength bolts of smaller specifications, the heating time of high-strength bolts of smaller specifications is also shorter. After the annealing of the strength bolts is completed, the first motor 13 installed on the annealing box 1 drives the driving frame 12 to rotate, thereby driving the driving block 11 rotatably connected to the driving frame 12 to slide in the slide groove, thereby driving the driving rod 10 to rotate on the annealing box 1, thereby driving the discharging rod 3 rotatably connected to the bottom end of the driving rod 10 to move, thereby driving the discharging rod 3 to rotate between the two sliders 8, and at the same time driving the two sliders 8 to slide in the slide 7, so that the annealed small-sized high-strength bolts are discharged at the corresponding discharge port, while the large-sized high-strength bolts continue to be transported and heated;

[0058] When the annealed high-strength bolts are unloaded, the unloading shaft 17 is driven to rotate by the second motor 18 installed on the unloading frame 15, thereby driving the unloading steel belt 4 connected between the two unloading shafts 17 to drive, and then driving the buffer rod 19 fixedly connected to the unloading steel belt 4 to move, thereby supporting the annealed high-strength bolts to be unloaded slowly, thereby effectively preventing the high-strength bolts from being unloaded too quickly and preventing the threads on the high-strength bolts from being damaged by collision;

[0059] After the increased size of the high-strength bolts is heated, the cooling speed will be slower due to the larger size. Therefore, it is necessary to distribute cold air through the refrigerator 5 installed on the lifting plate 20, and blow the cold air distributed by the refrigerator 5 onto the high-strength bolts through the fan 23 installed on the annealing box 1, and drive the lifting screw 22 to rotate through the third motor 21 installed on the annealing box 1, thereby driving the lifting plate 20 to be raised and lowered, thereby adjusting the distance between the refrigerator 5 and the high-strength bolts, and adaptively cooling the high-strength bolts.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous annealing furnace for nuclear power bolt production, characterized in that: The invention comprises an annealing box (1), wherein the annealing box (1) is provided with a feed inlet and a discharge outlet, and further comprises: A radiant tube heater (2), wherein the radiant tube heater (2) is provided in a plurality, and each of the radiant tube heaters (2) is installed in the annealing box (1); A batch discharging mechanism, wherein the batch discharging mechanism is provided in a plurality of pieces and is installed in the annealing box (1). The batch discharging mechanism comprises a discharging rod (3) and the discharging rod (3) is arranged in the annealing box (1) and is used for discharging the high-strength bolts after annealing; A feeding mechanism, wherein the feeding mechanism is provided in a plurality and is installed in the annealing box (1). The feeding mechanism comprises a feeding steel belt (4) which is provided on the annealing box (1) and is used for slowly feeding the high-strength bolts after annealing; A cooling mechanism, the cooling mechanism being installed in the annealing box (1), the cooling mechanism comprising a refrigerator (5), the refrigerator (5) being arranged in the annealing box (1) and being used for adaptively cooling the high-strength bolts after annealing; A conveying mechanism is installed in the annealing box (1), and the conveying mechanism comprises a conveying steel belt (6). The conveying steel belt (6) is arranged in the annealing box (1) and is used to convey high-strength bolts.

2. A continuous annealing furnace for nuclear power bolt production according to claim 1, characterized in that: The batch discharging mechanism also includes: A slide (7), the slide (7) is fixedly connected in the annealing box (1), two sliders (8) are fixedly connected in the slide (7), the discharging rod (3) is rotatably connected between the two sliders (8), and two push plates (9) are fixedly connected to the discharging rod (3); A driving rod (10), wherein the driving rod (10) is rotatably connected in the annealing box (1), and the bottom end of the driving rod (10) is rotatably connected in the discharging rod (3), and a sliding groove is provided on the driving rod (10), and a driving block (11) is slidably connected in the sliding groove; A driving frame (12), one end of the driving frame (12) being rotatably connected to the driving block (11); A first motor (13), the first motor (13) being mounted on the annealing box (1), the output end of the first motor (13) being fixedly connected to the other end of the driving frame (12); A force-bearing plate (14), wherein the force-bearing plate (14) is fixedly connected in the annealing box (1), and the conveying steel belt (6) is in contact with the force-bearing plate (14).

3. A continuous annealing furnace for nuclear power bolt production according to claim 2, characterized in that: The unloading mechanism also includes: A material unloading rack (15), the material unloading rack (15) is fixedly connected to the annealing box (1), the annealing box (1) is provided with a material unloading opening, and a material discharge door (16) is hinged at the material unloading opening; A material discharge shaft (17), wherein two material discharge shafts (17) are provided, and both of the two material discharge shafts (17) are rotatably connected in the material discharge frame (15); A second motor (18), wherein the second motor (18) is mounted on the unloading frame (15), and an output end of the second motor (18) passes through the unloading frame (15) and is fixedly connected to one of the unloading shafts (17); A buffer rod (19), wherein the buffer rod (19) is arranged in a plurality, and each of the buffer rods (19) is fixedly connected to the blanking steel belt (4).

4. A continuous annealing furnace for nuclear power bolt production according to claim 3, characterized in that: The cooling mechanism also includes: A lifting plate (20), the lifting plate (20) being slidably connected in the annealing box (1), and the refrigerator (5) being mounted on the lifting plate (20); a third motor (21), the third motor (21) being mounted on the annealing box (1), the output end of the third motor (21) passing through the annealing box (1) and being fixedly connected to a lifting screw (22), a screw hole being provided on the lifting plate (20), and the lifting screw (22) being threadedly connected to the lifting screw (22); A fan (23), wherein the fan (23) is installed on the annealing box (1), and the output end of the fan (23) faces the refrigerator (5).

5. A continuous annealing furnace for nuclear power bolt production according to claim 4, characterized in that: The conveying mechanism also includes: A conveying frame (24), wherein two conveying frames (24) are provided, and the two conveying frames (24) are both fixedly connected at the feed inlet and the discharge outlet; A conveying shaft (25), wherein two conveying shafts (25) are provided, and the two conveying shafts (25) are rotatably connected in the two conveying frames (24) respectively; A fourth motor (26), wherein the fourth motor (26) is mounted on one of the conveying frames (24), and an output end of the fourth motor (26) passes through the conveying frame (24) and is fixedly connected to one of the conveying shafts (25).

6. A continuous annealing furnace for nuclear power bolt production according to claim 5, characterized in that: Two baffles (27) are fixedly connected to the two conveying shafts (25), and the conveying steel belt (6) is arranged between the two baffles (27).

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