A high-temperature-resistant seamless steel pipe heat treatment forming device

Abstract

This invention relates to the field of heat treatment technology and proposes a heat treatment forming device for high-temperature resistant seamless steel pipes. The device includes a worktable, a heat treatment chamber located in the center of the worktable, conveying devices symmetrically arranged on both sides of the heat treatment chamber, a motor fixed to the outer side of the heat treatment chamber, and two sets of heating tubes arranged in the upper and lower inner cavities of the heat treatment chamber. A pusher frame is provided inside the heat treatment chamber between the two sets of heating tubes. In this invention, by setting a pusher frame between the two sets of heating tubes inside the heat treatment chamber, and by using a square-frame hollow design, the upper and lower sets of heating tubes can directly heat the steel pipe. Compared with existing technologies, this invention reduces obstruction during steel pipe heating, improves heat utilization efficiency, and utilizes the pusher frame to allow the steel pipe to be transported normally within the heat treatment chamber, thereby completing the heat treatment within the chamber. This solves the problem of obstruction during steel pipe heating in existing technologies.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat treatment, in particular, to a high-temperature-resistant seamless steel pipe heat treatment forming device. BACKGROUND

[0002] Seamless steel pipes have hollow sections and are widely used as pipelines for transporting fluids, such as oil, natural gas, coal gas, water, and certain solid materials. Compared with solid steel materials such as round steel, seamless steel pipes have the same bending and torsional strength, but are lighter in weight, making them an economical section of steel that is widely used to manufacture structural components and mechanical parts, such as oil drilling pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in construction. Steel pipes are also used to manufacture annular parts, which can improve material utilization, simplify manufacturing processes, save materials and processing time, and have been widely used.

[0003] Seamless steel pipe metal heat treatment is a process method that heats steel to a predetermined temperature, maintains it at that temperature for a certain period of time, and then cools it at a predetermined cooling rate. According to the search, the announcement number CN217265927U discloses a high-temperature-resistant seamless steel pipe heat treatment equipment, which comprises a workbench, a power device and a furnace body. The top and bottom of the furnace body are provided with heating pipes. The top end of the workbench is fixed with support frames on both sides. The support frames are movably connected with a conveying plate. The conveying plate is provided with lifting devices on both sides of the plate body. The plate body of the conveying plate is provided with a rectangular slot. The seamless steel pipe heat treatment equipment is provided with two groups of heating pipes, a conveying plate, lifting devices, a turnover assembly and a vibration device. First, the height of the conveying plate is adjusted by the lifting device according to the size of the steel pipe. Then, the steel pipe to be processed is placed on the roller. The power assembly drives the roller to roll. The steel pipe moves to the middle of the furnace body and is heated.

[0004] However, the above-mentioned seamless steel pipe heat treatment equipment still has the following problems:

[0005] 1. The above-mentioned seamless steel pipe heat treatment equipment is provided with a conveying plate penetrating the furnace body. The steel pipe is continuously conveyed by the guide rollers on the conveying plate to realize the heating of the steel pipe in the furnace body. However, due to the shielding of the conveying plate and the guide rollers during heating of the steel pipe, the utilization efficiency of heat is low, which affects the heating of the steel pipe by the lower heating pipes.

[0006] 2. During the heating process of the above-mentioned seamless steel pipe heat treatment equipment, the top shaft in the turnover assembly is driven by the vibration device to move up and down, thereby lifting the steel pipe. The steel pipe is turned over during the lifting process. However, since there is no limiting on both sides when the steel pipe is lifted, the steel pipe is prone to rolling to both sides during the lifting process. The rolling direction and distance are uncontrollable, which affects the uniform heating of the steel pipe.

[0007] 3. Because the rolling direction and rolling distance of the steel pipe after it is lifted are uncontrollable, the heating position of the steel pipe is uncertain. It is difficult to control the heating of different positions of the steel pipe evenly on the upper and lower heating pipes, which affects the heat treatment forming quality of the steel pipe. Summary of the Invention

[0008] This invention proposes a heat treatment forming device for high-temperature resistant seamless steel pipes, which solves the problems in the prior art such as obstruction during steel pipe heating, lack of limiting on both sides when the steel pipe is lifted, and difficulty in controlling the heating of different parts of the steel pipe evenly.

[0009] The technical solution of the present invention is as follows: A high-temperature resistant seamless steel pipe heat treatment forming device includes a workbench, a heat treatment box located in the middle of the workbench, a conveying device symmetrically arranged on both sides of the heat treatment box, a motor fixed to the outer side of the heat treatment box, and two sets of heating tubes arranged in the upper and lower inner cavities of the heat treatment box. A pusher frame is arranged between the two sets of heating tubes in the heat treatment box. A swing mechanism is arranged on the side of the pusher frame to push the steel pipe intermittently under the drive of the motor. A support frame is arranged above the pusher frame and fixed in the heat treatment box. Two pairs of pipe clamping mechanisms are arranged on the support frame. Two sets of pipe flipping mechanisms are arranged at both ends of the pusher frame to flip the steel pipe in conjunction with the pipe clamping mechanisms when the pusher frame pushes.

[0010] Preferably, the pusher includes a frame, the frame is square-shaped, and a rectangularly distributed fixing plate is fixed at the bottom.

[0011] Preferably, the rocking mechanism includes a first hinge seat and a second hinge seat, which are alternately arranged at different heights. A first rocker arm is hinged to the first hinge seat, and a second rocker arm is hinged to the second hinge seat. The second rocker arm is fixed to the output shaft end of the motor, and a third rocker arm is hinged between the first rocker arm and the second rocker arm.

[0012] Preferably, the middle part of the third swing arm is raised in a Y-shape, and the raised end is hinged to the end of the fixed plate.

[0013] Preferably, the clamping mechanism includes a first clamping plate and a second clamping plate arranged symmetrically. The first clamping plate and the second clamping plate are both hinged to the support frame by a pivot, and the first clamping plate and the second clamping plate are elastically connected by a first spring.

[0014] Preferably, the first clamping plate and the second clamping plate have a Z-shaped structure. The upper part of the first clamping plate and the second clamping plate has a first slot, and a roller is rotatably connected in the first slot. The lower part of the first clamping plate and the second clamping plate has a second slot, and a spring rod is fixed in the second slot. The two ends of the first spring are respectively fixed to the spring rods of the first clamping plate and the second clamping plate.

[0015] Preferably, the pipe turning mechanism comprises a fixed seat, a sliding block is fixed on the fixed seat, two sliding plates are symmetrically arranged above the fixed seat, and sliding grooves that are in sliding cooperation with the sliding block are formed in the ends of the two sliding plates, and the two sliding plates are elastically connected through a second spring.

[0016] Preferably, a smooth inclined surface is arranged on the top of the sliding plate, and a rough friction surface is arranged on the outer side of the sliding plate.

[0017] Preferably, a hook is fixed on the bottom of the sliding plate, and an arc-shaped hook groove is arranged on the hook.

[0018] The beneficial effects of the present application are:

[0019] In the present application, the push frame is arranged between the two groups of heating pipes in the heat treatment box, and the frame is designed in a square hollow shape, so that the upper and lower two groups of heating pipes can directly heat the steel pipe. Compared with the prior art, the present application reduces the shielding of the steel pipe during heating, improves the utilization efficiency of heat, and utilizes the pushing of the frame to normally convey the steel pipe in the heat treatment box, thereby completing the heat treatment in the heat treatment box, and solving the problem of shielding of the steel pipe during heating in the prior art.

[0020] In the present application, two groups of pipe turning mechanisms are arranged at the two ends of the push frame. During the pushing process of the push frame, the pipe turning mechanisms can cooperate with the pipe clamping mechanism to slowly turn the steel pipe, thereby adjusting the heating surface of the steel pipe and making the heating of each part of the steel pipe uniform. Compared with the prior art, the present application has high synchronism in turning the steel pipe and the turning mode is more stable, which is beneficial to the heat treatment forming of the steel pipe, and solves the problem of lack of limiting on both sides when the steel pipe is lifted in the prior art.

[0021] In the present application, a swinging mechanism is arranged on the side of the push frame. Under the driving of the motor, the push frame can be pushed by the swinging mechanism, and the steel pipe is intermittently pushed by the push frame. Compared with the prior art, the present application adopts an intermittent pushing mode to make different parts of the steel pipe equidistantly complete processing in the heat treatment box, so as to ensure that the heating time of each part is consistent, and solves the problem of difficult balanced control of the heating of different positions of the steel pipe in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0023] Figure 1 A structure schematic diagram of a high-temperature-resistant seamless steel pipe heat treatment forming device is provided in the present application.

[0024] Figure 2 A partial sectional structure schematic diagram of a heat treatment box is provided in the present application.

[0025] Figure 3The structure schematic diagram of the pushing frame provided by the present application is shown in the figure;

[0026] Figure 4 The structure schematic diagram of the pushing frame in initial state provided by the present application is shown in the figure;

[0027] Figure 5 The structure schematic diagram of the pushing frame in jacking state provided by the present application is shown in the figure;

[0028] Figure 6 The structure schematic diagram of the pipe clamping mechanism provided by the present application is shown in the figure;

[0029] Figure 7 The structure schematic diagram of the pipe turning mechanism provided by the present application is shown in the figure;

[0030] In the figure: 1, workbench; 2, heat treatment box; 3, conveying device; 4, motor; 5, pushing frame; 51, frame; 52, fixed plate; 6, swinging mechanism; 61, first hinge base; 62, second hinge base; 63, first swing lever; 64, second swing lever; 65, third swing lever; 7, support frame; 8, pipe clamping mechanism; 81, first clamping plate; 82, second clamping plate; 83, first notch; 84, roller; 85, rotating shaft; 86, second notch; 87, spring lever; 88, first spring; 9, pipe turning mechanism; 91, fixed seat; 92, sliding block; 93, sliding plate; 94, second spring; 95, smooth inclined surface; 96, friction surface; 97, hook; 98, arc-shaped hook groove; 10, heating pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Please refer to Figure 1 With Figure 2 The present application provides a technical solution: a high-temperature-resistant seamless steel pipe heat treatment forming device, comprising a workbench 1, a heat treatment box 2 located at the middle position of the workbench 1, a conveying device 3 symmetrically arranged on both sides of the heat treatment box 2, a motor 4 fixed to the outer side of the heat treatment box 2, and two groups of heating pipes 10 arranged in the upper and lower cavities of the heat treatment box 2. It should be noted that the conveying device 3 is composed of a rack and a plurality of electric guide rollers arranged in the rack. The guide rollers horizontally convey the steel pipe, and the height of the rack is adjustable. The adjustment method can refer to the comparison file. In the figure, the height adjustment of the rack is realized by a pneumatic cylinder. The pushing frame 5 is arranged between the two groups of heating pipes 10 in the heat treatment box 2, such as Figure 3As shown, the push frame 5 comprises a frame 51 in the shape of a square box, and a fixed plate 52 of rectangular distribution is fixed at the bottom. The frame 51 is designed in the shape of a square box with hollows, which facilitates the direct heating of the steel pipes by the two groups of heating pipes 10, reduces the shielding, and improves the heat utilization efficiency. The push frame 5 is pushed by the frame 51, so that the steel pipes can be normally conveyed in the heat treatment box 2, and then the heat treatment is completed in the heat treatment box 2.

[0033] Please refer to Figure 3 , Figure 4 and Figure 5 , a swing mechanism 6 is arranged at the side of the push frame 5, which is driven by the motor 4 to push the push frame 5 and intermittently push the steel pipes. The swing mechanism 6 comprises a first hinge base 61 and a second hinge base 62, which are arranged alternately in height. The first hinge base 61 is hingedly connected with a first swing rod 63, and the second hinge base 62 is hingedly connected with a second swing rod 64, which is fixed to the output shaft end of the motor 4. A third swing rod 65 is hingedly connected between the first swing rod 63 and the second swing rod 64. The middle part of the third swing rod 65 is y-shaped and is raised, and the raised end is hingedly connected with the end of the fixed plate 52. As shown in the state, Figure 4 , the two ends of the steel pipe are placed on the guide rollers of the two side conveying devices 3. The frame 51 and the pipe turning mechanism 9 on the frame 51 are located below the steel pipe and do not contact the steel pipe. When the second swing rod 64 is rotated counterclockwise to the position shown in Figure 5 , the frame 51 is gradually raised under the pushing of the fixed plate 52. With the continuous rotation of the second swing rod 64, the pipe turning mechanism 9 on the frame 51 starts to lift the steel pipe, and the steel pipe is intermittently pushed from right to left.

[0034] Please refer to Figure 3 and Figure 6 , a support frame 7 is arranged above the push frame 5 and is fixed in the heat treatment box 2. Two pairs of pipe clamping mechanisms 8 are arranged on the support frame 7. The pipe clamping mechanism 8 comprises a first clamping plate 81 and a second clamping plate 82 which are symmetrically arranged. The first clamping plate 81 and the second clamping plate 82 are hingedly connected to the support frame 7 through a rotating shaft 85. The first clamping plate 81 and the second clamping plate 82 are elastically connected through a first spring 88. The first clamping plate 81 and the second clamping plate 82 are in the shape of Z. A first notch 83 is formed in the upper part of the first clamping plate 81 and the second clamping plate 82. A roller 84 is rotatably connected in the first notch 83. A second notch 86 is formed in the lower part of the first clamping plate 81 and the second clamping plate 82. A spring rod 87 is fixed in the second notch 86. The two ends of the first spring 88 are fixed on the spring rods 87 of the first clamping plate 81 and the second clamping plate 82.

[0035] Please refer to Figure 3 and Figure 7Two ends of the pushing frame 5 are provided with two groups of pipe turning mechanisms 9 for cooperating with the pipe clamping mechanism 8 to turn the steel pipes when the pushing frame 5 pushes, the pipe turning mechanism 9 comprises a fixed seat 91, a sliding block 92 is fixed on the fixed seat 91, two sliding plates 93 are symmetrically arranged above the fixed seat 91, sliding grooves are formed in the tail ends of the two sliding plates 93 and are slidably matched with the sliding block 92, the two sliding plates 93 are elastically connected through a second spring 94, a smooth inclined surface 95 is arranged on the top of the sliding plate 93, a rough friction surface 96 is arranged on the outer side of the sliding plate 93, the sliding plate 93 passes through the two steel pipes between the inner sides of the first clamping plate 81 and the second clamping plate 82 from the top, and the steel pipes are pressed on the rollers 84 of the first clamping plate 81 and the second clamping plate 82 on the two sides under the extrusion of the smooth inclined surface 95 on the top of the sliding plate 93, with the increase of the height of the sliding plate 93, the friction surface 96 on the side of the sliding plate 93 starts to contact the steel pipes, and the steel pipes are slowly turned over under the friction of the friction surface 96 and the steel pipes, hooks 97 are fixed on the bottom outer side of the sliding plate 93, arc-shaped hook grooves 98 are arranged on the hooks 97, and the steel pipes are lifted by the hooks 97 after the steel pipes fall into the arc-shaped hook grooves 98 of the hooks 97, so that the steel pipes are separated from the guide rollers of the conveying device 3 on the two sides, and the subsequent pushing action of the steel pipes can be realized.

[0036] The working principle and use process of the present application are as follows: during processing, two steel pipes are placed between the two pairs of first clamping plates 81 and second clamping plates 82, the first clamping plate 81 and the second clamping plate 82 clamp the steel pipes under the elastic force of the first spring 88, and the steel pipes are heat treated by the two groups of heating pipes 10 in the heat treatment box 2, the motor 4 outside the heat treatment box 2 works to drive the second swing rod 64 to rotate, in the initial state, the frame 51 is in the state shown in Figure 4 , the two ends of the steel pipes are on the guide rollers of the conveying device 3 on the two sides, the frame 51 and the pipe turning mechanism 9 on the frame 51 are below the steel pipes and do not contact the steel pipes, when the second swing rod 64 rotates to the position shown in Figure 5 , the frame 51 is gradually raised under the pushing of the fixed plate 52, in this process, the top of the sliding plate 93 passes through the two steel pipes between the inner sides of the first clamping plate 81 and the second clamping plate 82, and the steel pipes are pressed on the rollers 84 of the first clamping plate 81 and the second clamping plate 82 on the two sides under the extrusion of the smooth inclined surface 95 on the top of the sliding plate 93, with the increase of the height of the sliding plate 93, the friction surface 96 on the side of the sliding plate 93 starts to contact the steel pipes, and the steel pipes are slowly turned over under the friction of the friction surface 96 and the steel pipes, so that the heating surface can be adjusted, the steel pipes are lifted by the hooks 97 after the steel pipes fall into the arc-shaped hook grooves 98 of the hooks 97, so that the steel pipes are separated from the guide rollers of the conveying device 3 on the two sides;

[0037] When the second swing lever 64 continues to rotate counterclockwise, the frame 51 moves horizontally from right to left, and pushes the steel pipe from right to left under the friction of the friction surface 96 outside the slide plate 93, so that other parts of the steel pipe are pushed into the heat treatment box 2, until the steel pipes are placed between the two pairs of first clamping plates 81 and second clamping plates 82, and the first clamping plates 81 and the second clamping plates 82 clamp the steel pipes under the elastic force of the first springs 88, and the frame 51 is again in the initial state shown in Fig. 1. Figure 4 The next part of the steel pipe is heat treated by the two groups of heating pipes 10 in the heat treatment box 2, and then the above process is repeated to complete the heat treatment of the entire steel pipe.

[0038] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-temperature-resistant seamless steel pipe heat treatment forming device, comprising a workbench (1), a heat treatment box (2) located at the middle position of the workbench (1), conveying devices (3) symmetrically arranged on both sides of the heat treatment box (2), a motor (4) fixed to the outer side of the heat treatment box (2), and two groups of heating pipes (10) arranged in the upper and lower inner cavities of the heat treatment box (2), characterized in that, The heat treatment box (2) is provided with a pushing frame (5) between two groups of heating pipes (10), the side of the pushing frame (5) is provided with a swing mechanism (6) for pushing the pushing frame (5) under the drive of a motor (4) to intermittently push the steel pipes, the upper portion of the pushing frame (5) is provided with a supporting frame (7) fixed in the heat treatment box (2), the supporting frame (7) is provided with two pairs of pipe clamping mechanisms (8), and the two ends of the pushing frame (5) are provided with two groups of pipe turning mechanisms (9) for turning the steel pipes in cooperation with the pipe clamping mechanisms (8) when the pushing frame (5) pushes the steel pipes. The pushing frame (5) comprises a frame (51), the frame (51) is in the shape of a square box, and the bottom is fixed with a rectangular fixed plate (52). The swing mechanism (6) comprises first and second hinge seats (61) and (62), the first and second hinge seats (61) and (62) are alternately arranged in height, the first hinge seat (61) is hingedly connected with a first swing rod (63), the second hinge seat (62) is hingedly connected with a second swing rod (64), the second swing rod (64) is fixed to the output shaft end of the motor (4), a third swing rod (65) is hingedly connected between the first swing rod (63) and the second swing rod (64), the middle portion of the third swing rod (65) is y-shaped and is raised, and the raised end is hingedly connected with the end of the fixed plate (52). The pipe turning mechanism (9) comprises a fixed seat (91), the fixed seat (91) is fixed with a sliding block (92), the upper portion of the fixed seat (91) is symmetrically provided with two sliding plates (93), the ends of the two sliding plates (93) are provided with sliding grooves in sliding cooperation with the sliding block (92), and the two sliding plates (93) are elastically connected through a second spring (94); the top of the sliding plate (93) is provided with a smooth inclined surface (95), the outer side of the sliding plate (93) is provided with a rough friction surface (96); the bottom outer side of the sliding plate (93) is fixed with a hook (97), and the hook (97) is provided with an arc-shaped hook groove (98).

2. The apparatus according to claim 1, wherein The pipe clamping mechanism (8) comprises symmetrically arranged first and second clamping plates (81) and (82), the first and second clamping plates (81) and (82) are hingedly connected to the supporting frame (7) through a rotating shaft (85), and the first and second clamping plates (81) and (82) are elastically connected through a first spring (88).

3. The apparatus according to claim 2, wherein The first and second clamping plates (81) and (82) are Z-shaped structures, the upper portions of the first and second clamping plates (81) and (82) are provided with first notches (83), the first notches (83) are rotatably connected with rollers (84), the lower portions of the first and second clamping plates (81) and (82) are provided with second notches (86), the second notches (86) are fixed with spring rods (87), and the two ends of the first spring (88) are fixed to the spring rods (87) of the first and second clamping plates (81) and (82).

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