Steel pipe heat treatment device

Abstract

The utility model relates to the technical field of steel pipe processing, in particular to a steel pipe heat treatment device. Comprising a heating kiln, a plurality of guide rollers are arranged in the heating kiln, a heater is fixed in the heating kiln, the guide rollers are rotationally arranged in the heating kiln and driven by a driving device, an inlet and an outlet are formed in the two ends of the heating kiln respectively, and the sides, facing the steel pipe moving direction, of the inlet and the outlet are fixedly communicated with barrels; the heating kiln is located between the two lower conveying belts, an upper conveying belt is arranged above the lower conveying belt on one side of the outlet, and the upper conveying belt is located above the lower conveying belt on the other side of the outlet. The upper conveying belt is connected with the lower conveying belt below through a plurality of telescopic assemblies. Through the arrangement of the sealing plate, the loss of heat in the heating kiln can be reduced on the premise that the steel pipes are effectively conveyed, and the energy consumption can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing, in particular to a steel pipe heat treatment device. Background Technique

[0002] Steel pipes are made by piercing steel ingots or solid billets to form seamless tubes, and then hot-rolling, cold-rolling or cold-drawing them. Steel pipes are not only used for transporting fluids and powdered solids, exchanging heat energy, manufacturing mechanical parts and containers, but also an economical steel product. During the production process of steel pipes, for example, steel pipes used for the structural bodies of mechanical devices inside oil pipelines, in order to provide stable performance and improve the strength and toughness of the material, heat treatment operations need to be carried out.

[0003] A patent document with the application number CN201921458824.8 discloses a seamless steel pipe heat treatment device. During actual operation, the seamless steel pipe is placed into the inner part of the placement groove on the conveying rack through a hoisting device, and then the air cylinder is adjusted outwards. The positioning sleeve on the air cylinder presses on the surface of the seamless steel pipe, and the air cylinder drives the seamless steel pipe to approach one end of the reduction motor. Finally, the seamless steel pipe presses on the surface of the positioning sleeve on the reduction motor. At this time, the conveying rack is started, and the seamless steel pipe is conveyed into the inner part of the heat treatment furnace through the conveying rack, and the seamless steel pipe is conveyed to the lower end of the heating pipe. The reduction motor and the heating pipe are started, and the heating pipe conducts heat treatment on the seamless steel pipe. At the same time, the reduction motor drives the seamless steel pipe to rotate inside the placement groove, so that the heating pipe uniformly heats the seamless steel pipe, ensuring the heat treatment quality of the seamless steel pipe. When the heat treatment of the seamless steel pipe is completed, the seamless steel pipe continues to be conveyed and is conveyed to the lower end of the spray head. At this time, the condensed water inside the spray head is sprayed on the surface of the seamless steel pipe to achieve rapid cooling of the seamless steel pipe. By rotating the seamless steel pipe, the seamless steel pipe is evenly cooled, ensuring the cold drawing quality of the seamless steel pipe. However, the cooling cavity for cooling the steel pipe and the heating cavity for heating the steel pipe of this processing device are connected. When cooling the steel pipe, water vapor easily enters the heating cavity, thereby reducing the temperature in the heating cavity, resulting in large heat loss and high energy consumption.

[0004] A heat treatment device for high-temperature resistant seamless steel pipes is disclosed in the patent document with the application number CN202223581777.0. When in use, the motor automatically controls the rotation of the screw through the gearbox, enabling the screw to drive the guide ear screw at the bottom of the support frame, causing the guide ear to drive the support frame to move longitudinally on the guide groove. The electric push rod controls the top head to tightly fix the seamless steel pipe. The electric heating coil is controlled by the electric heating box to generate high temperature, and the heat preservation cover is used to control the heat preservation of the electric heating coil. The seamless steel pipe is heat-treated by the electric heating coil. At the same time, it moves through the electric wheels on the vehicle frame within the running track, enabling the electric heating coil to move and perform a circumferential circulation heat treatment on the seamless steel pipe. This device positions the steel pipe by squeezing it with two groups of electric push rods. After heating the steel pipe, the steel pipe is prone to deformation. At the same time, this device also has the problem that it is inconvenient to remove the steel pipe with a relatively high temperature after heating the steel pipe. Utility Model Content

[0005] The technical problem to be solved by the present utility model lies in a steel pipe heat treatment device that can avoid the deformation of the steel pipe during the heating process, reduce heat loss, and facilitate the transportation of the heated steel pipe.

[0006] In order to achieve the above object, the technical solution provided by the present utility model is:

[0007] A steel pipe heat treatment device includes a heating kiln. Inside the heating kiln, a plurality of guide rollers are linearly arranged in an array along its length direction. A heater is fixed inside the heating kiln. The guide rollers are rotatably arranged inside the heating kiln and are driven by a driving device. At both ends of the heating kiln in the length direction, an inlet and an outlet are respectively provided, and the inlet and the outlet are concentrically arranged. The steel pipe moves from the inlet direction to the outlet direction. On one side of the inlet and the outlet facing the movement direction of the steel pipe, cylinders are fixedly connected. The cylinder on the inlet side is located inside the heating kiln. On one side of the cylinder facing the movement direction of the steel pipe, an inclined surface is processed. The lower end of the inclined surface inclines towards the movement direction of the steel pipe. At one end of the cylinder facing the movement direction of the steel pipe, a sealing plate is rotatably connected. The sealing plate seals the cylinder. The upper end of the cylinder is rotatably connected to the upper end of the sealing plate. During the movement of the steel pipe, it can push the sealing plate to move and penetrate the cylinder; it also includes two lower conveyor belts. The heating kiln is located between the two lower conveyor belts. The two lower conveyor belts correspond to the inlet and the outlet one by one. Above the lower conveyor belt on the outlet side, an upper conveyor belt is provided. The upper conveyor belt and the lower conveyor belt below it are connected by a plurality of telescopic components. On the upper ends of the lower conveyor belts, two baffles are provided. The space between the two baffles corresponds to the inlet and the outlet. After the steel pipe moves between the upper conveyor belt and the lower conveyor belt on the outlet side, the steel pipe is sprayed with water for cooling.

[0008] Specifically, the upper flat part of the lower conveyor belt is flush with the upper end of the guide roller.

[0009] Specifically, a second ear plate is fixed to the upper end of the cylinder body, a first ear plate is fixed to the upper end of the sealing plate, and the first ear plate is rotatably connected to the second ear plate.

[0010] Specifically, a counterweight is fixed to the lower end of the sealing plate.

[0011] Specifically, the baffle above the lower conveyor belt is fixedly connected to the housing of the upper conveyor belt through a plurality of connecting rods.

[0012] Specifically, the telescopic assembly is a telescopic rod, and the number of telescopic rods is four. The four corners of the housing of the upper conveyor belt are respectively fixedly connected to the upper ends of the four telescopic rods, and the lower ends of the telescopic rods are fixedly connected to the housing of the lower conveyor belt below the upper conveyor belt.

[0013] Specifically, an upper support plate is arranged between the upper flat part and the lower flat part of the upper conveyor belt. The upper support plate is in sliding contact with the upper end of the lower flat part of the upper conveyor belt, and the upper support plate is fixedly connected to the housing of the upper conveyor belt. A lower support plate is fixed inside the lower conveyor belt, and the upper end of the lower support plate is in sliding contact with the lower end of the upper flat part of the lower conveyor belt.

[0014] Specifically, the number of the heaters is two, and the two heaters are respectively fixed in the heating kiln on the upper and lower sides of a plurality of guide rollers.

[0015] Specifically, legs are fixed to the four corners of the housing of the lower conveyor belt.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By arranging the sealing plate in the present utility model, after the steel pipe moves into the heating kiln, the sealing plate can block the cylinder body under the action of its own gravity and the gravity of the counterweight, which can reduce the heat loss in the heating kiln. During the conveying process of the steel pipe, the steel pipe can push the sealing plate to rotate and penetrate the cylinder body, which can reduce the heat loss in the heating kiln on the premise of ensuring the effective conveying of the steel pipe, and can save energy consumption.

[0018] 2. By arranging the upper conveyor belt above the lower conveyor belt on the outlet side, and the height of the upper conveyor belt can be adjusted. After the steel pipe moves between the upper conveyor belt and the lower conveyor belt on the outlet side, the upper conveyor belt and the lower conveyor belt can clamp and convey the steel pipe, which can prevent the steel pipe from slipping during the conveying process and can ensure the effective conveying of the steel pipe.

[0019] 3. By arranging two baffles on the lower conveyor belt, the two baffles can convey the steel pipe and prevent the steel pipe from rolling and falling during the conveying process.

[0020] 4. By arranging the upper support plate and the lower support plate, the clamping force on the steel pipe when the upper conveyor belt and the lower conveyor belt on the outlet side clamp and convey the steel pipe can be ensured, and the effective conveying of the steel pipe can be ensured. Description of the Drawings

[0021] Figure 1 This is a schematic diagram of the present utility model.

[0022] Figure 2 This is a schematic diagram of the cooperation between the cylinder body and the sealing plate on the outlet side.

[0023] Figure 3 This is a front view of the cooperation between the cylinder body and the sealing plate on the outlet side.

[0024] Figure 4 This is a top view of the cooperation between the cylinder body and the sealing plate on the outlet side.

[0025] Figure 5 It is Figure 4 the sectional view taken along the A-A direction in

[0026] Figure 6 This is a schematic diagram of the cooperation between the lower conveyor belt and the upper conveyor belt on the outlet side.

[0027] Figure 7 This is a top view of the cooperation between the lower conveyor belt and the upper conveyor belt on the outlet side.

[0028] Figure 8 It is Figure 7 the sectional view taken along the B-B direction in

[0029] The names of the components in the drawings are as follows:

[0030] 1 Heating kiln

[0031] 2 Heater

[0032] 3 Guide roller

[0033] 4 Inlet

[0034] 5 Outlet

[0035] 6 Lower conveyor belt

[0036] 7 Baffle

[0037] 8 Leg

[0038] 9 Lower support plate

[0039] 10 Upper support plate

[0040] 11 Upper conveyor belt

[0041] 12 Telescopic rod

[0042] 13 Cylinder body

[0043] 14 Sealing plate

[0044] 15 First ear plate

[0045] 16 Second ear plate

[0046] 17 Counterweight

[0047] 18 Connecting rod. Specific embodiments

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0049] Embodiment 1: Refer to Figures 1 - 8 As shown, the steel pipe heat treatment device includes a heating kiln 1. Inside the heating kiln 1, a plurality of guide rollers 3 are linearly arranged in its length direction. The guide rollers 3 are rotatably arranged in the heating kiln 1 and are driven by a driving device. The plurality of guide rollers 3 can convey the steel pipe in the heating kiln 1.

[0050] A heater 2 is fixed inside the heating kiln 1. The number of the heaters 2 is two, and the two heaters 2 are respectively fixed inside the heating kiln 1 on the upper and lower sides of the plurality of guide rollers 3. By arranging the heaters 2 inside the heating kiln 1 on the upper and lower sides of the plurality of guide rollers 3, the steel pipe can be evenly heated.

[0051] An inlet 4 and an outlet 5 are respectively opened at both ends of the heating kiln 1 in the length direction. The inlet 4 and the outlet 5 are concentrically arranged. The steel pipe moves from the direction of the inlet 4 to the direction of the outlet 5.

[0052] A cylinder 13 is fixedly connected to the side of the inlet 4 and the outlet 5 facing the moving direction of the steel pipe. The cylinder 13 on the side of the inlet 4 is located inside the heating kiln 1. A slope is processed on the side of the cylinder 13 facing the moving direction of the steel pipe, and the lower end of the slope is inclined towards the moving direction of the steel pipe. A sealing plate 14 is rotatably connected to one end of the cylinder 13 facing the moving direction of the steel pipe. The sealing plate 14 seals the cylinder 13. The upper end of the cylinder 13 is rotatably connected to the upper end of the sealing plate 14. During the movement of the steel pipe, the steel pipe can push the sealing plate 14 to move and penetrate the cylinder 13. Specifically, a second ear plate 16 is fixed to the upper end of the cylinder 13, a first ear plate 15 is fixed to the upper end of the sealing plate 14, and the first ear plate 15 is rotatably connected to the second ear plate 16. A counterweight 17 is fixed to the lower end of the sealing plate 14.

[0053] Under the action of its own gravity and the gravity of the counterweight 17, the sealing plate 14 can seal the cylinder 13, reducing the heat loss inside the heating kiln 1. During the conveying of the steel pipe, the steel pipe can push the sealing plate 14 to rotate and penetrate the cylinder 13, reducing the heat loss inside the heating kiln 1 on the premise of ensuring the effective conveying of the steel pipe, and saving energy consumption.

[0054] The steel pipe heat treatment device further includes two lower conveyor belts 6. The heating kiln 1 is located between the two lower conveyor belts 6, and the two lower conveyor belts 6 correspond to the inlet 4 and the outlet 5 one by one. Legs 8 are fixed at the four corners of the housing of the lower conveyor belt 6. The upper end of the upper flat part of the lower conveyor belt 6 is flush with the upper end of the guide roller 3.

[0055] During the transfer of the steel pipe between the lower conveyor belt 6 and the guide roller 3, the steel pipe can be prevented from jumping, and the transfer of the steel pipe between the guide roller 3 and the lower conveyor belt 6 can be realized smoothly.

[0056] Two baffles 7 are arranged at the upper end of the lower conveyor belt 6 respectively. The space between the two baffles 7 corresponds to the inlet 4 and the outlet 5. The baffle 7 above the lower conveyor belt 6 is fixedly connected with the housing of the upper conveyor belt 11 through a plurality of connecting rods 18. During the transfer of the steel pipe on the lower conveyor belt 6, the baffle 7 can prevent the steel pipe from rolling and falling on the lower conveyor belt 6.

[0057] An upper conveyor belt 11 is arranged above the lower conveyor belt 6 on one side of the outlet 5. The upper conveyor belt 11 and the lower conveyor belt 6 below it are connected through a plurality of telescopic components. The telescopic component is a telescopic rod 12, and the number of telescopic rods 12 is four. The four corners of the housing of the upper conveyor belt 11 are respectively fixedly connected with the upper ends of the four telescopic rods 12, and the lower ends of the telescopic rods 12 are fixedly connected with the housing of the lower conveyor belt 6 below the upper conveyor belt 11.

[0058] After the steel pipe moves between the upper conveyor belt 11 and the lower conveyor belt 6 on one side of the outlet 5, water spraying and cooling of the steel pipe starts.

[0059] Oxidation slag is likely to fall off from the heated steel pipe. At the same time, during the water spraying and cooling process, water can reduce the friction between the steel pipe and the lower conveyor belt 6. If only the lower conveyor belt 6 is arranged on one side of the outlet 5, the steel pipe is likely to slip when being conveyed on the lower conveyor belt 6 on one side of the outlet 5.

[0060] By arranging the upper conveyor belt 11 above the lower conveyor belt 6 on one side of the outlet 5, after the steel pipe moves between the upper conveyor belt 11 and the lower conveyor belt 6 on one side of the outlet 5, the upper conveyor belt 11 and the lower conveyor belt 6 below it can clamp and convey the steel pipe, which can prevent slipping during the process of conveying the steel pipe and can ensure the effective conveying of the steel pipe.

[0061] The height of the upper conveyor belt 11 can be adjusted to be suitable for clamping and conveying steel pipes with different diameters.

[0062] Such as Figure 1As shown in the figure, during operation, the steel pipe is conveyed to the left on the lower conveyor belt 6 on the right side. After the left end of the steel pipe contacts the sealing plate 14 on the right side, as the steel pipe is continuously conveyed to the left, the sealing plate 14 on the right side is pushed and rotated by the steel pipe. When the steel pipe penetrates the cylinder 13 on the right side and completely enters the heating kiln 1, the sealing plate 14 on the right side seals the cylinder 13 on the right side. During the process of the steel pipe being conveyed to the left by the guide roller 3 in the heating kiln 1, the steel pipe is heated by the heater 2. As the steel pipe is continuously conveyed to the left, the sealing plate 14 on the left side is pushed and rotated by the steel pipe. When the steel pipe penetrates the cylinder 13 on the left side, the steel pipe enters between the upper conveyor belt 11 and the lower conveyor belt 6 below it. When the whole steel pipe is discharged from the heating kiln 1, the sealing plate 14 on the left side returns to its original position and seals the cylinder 13 on the left side.

[0063] During the process of the steel pipe moving between the upper conveyor belt 11 and the lower conveyor belt 6 below it, the steel pipe is sprayed with water for cooling. Under the clamping and conveying action of the upper conveyor belt 11 and the lower conveyor belt 6 below it, it is possible to avoid the phenomenon of the steel pipe slipping on the lower conveyor belt 6 when spraying water for cooling the steel pipe.

[0064] Embodiment 2: On the basis of Embodiment 1, with reference to Figure 1 and Figure 8 As shown in the figure, an upper support plate 10 is arranged between the upper flat part and the lower flat part of the upper conveyor belt 11. The upper support plate 10 is in sliding contact with the upper end of the lower flat part of the upper conveyor belt 11, and the upper support plate 10 is fixedly connected to the housing of the upper conveyor belt 11. A lower support plate 9 is fixed inside the lower conveyor belt 6, and the upper end of the lower support plate 9 is in sliding contact with the lower end of the upper flat part of the lower conveyor belt 6.

[0065] By arranging the upper support plate 10 and the lower support plate 9, it is possible to ensure the clamping force of the upper conveyor belt 11 and the lower conveyor belt 6 on the outlet 5 side when clamping and conveying the steel pipe, and it is possible to ensure the effective conveying of the steel pipe.

[0066] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel pipe heat treatment device, comprising a heating kiln (1), wherein a plurality of guide rollers (3) are arranged in a linear array in the length direction of the heating kiln (1), a heater (2) is fixed in the heating kiln (1), the guide rollers (3) are rotatably arranged in the heating kiln (1), the guide rollers (3) are driven by a driving device, an inlet (4) and an outlet (5) are respectively provided at both ends in the length direction of the heating kiln (1), the inlet (4) and the outlet (5) are concentrically arranged, and the steel pipe moves from the inlet (4) to the outlet (5), wherein the heating kiln (1) is provided with a plurality of guide rollers (3) in a linear array in the length direction of the heating kiln (1), wherein the heater (2) is fixed in the heating kiln (1), the guide rollers (3) are rotatably arranged in the heating kiln (1), and the guide rollers (3) are driven by a driving device, and an inlet (4) and an outlet (5) are respectively provided at both ends in the length direction of the heating kiln (1), the inlet (4) and the outlet (5) are concentrically arranged, and the steel pipe moves from the inlet (4) to the outlet (5), wherein the heating kiln (1) is provided with a plurality of guide rollers (3) in a linear array in the length direction of the heating kiln (1), wherein the heater (2 ... The inlet (4) and the outlet (5) are both fixedly connected to a cylinder (13) on the side facing the moving direction of the steel pipe. The cylinder (13) on the side of the inlet (4) is located in the heating kiln (1). The cylinder (13) is processed with an inclined surface on the side facing the moving direction of the steel pipe. The lower end of the inclined surface is inclined in the moving direction of the steel pipe. The end of the cylinder (13) facing the moving direction of the steel pipe is rotatably connected to a sealing plate (14). The sealing plate (14) seals the cylinder (13). The upper end of the cylinder (13) is connected to the sealing plate. (14) is rotatably connected at the upper end, and the steel pipe can push the sealing plate (14) to move and penetrate the cylinder (13) during movement; it also includes two lower conveyor belts (6), the heating kiln (1) is located between the two lower conveyor belts (6), the two lower conveyor belts (6) correspond to the inlet (4) and the outlet (5) one by one, and an upper conveyor belt (11) is arranged above the lower conveyor belt (6) on the side of the outlet (5), and the upper conveyor belt (11) is connected to the lower conveyor belt (6) below it through multiple telescopic components.

2. The steel pipe heat treatment device according to claim 1, characterized in that: The upper end of the upper straight portion of the lower conveyor belt (6) is flush with the upper end of the guide roller (3).

3. The steel pipe heat treatment device according to claim 1, characterized in that: A second ear plate (16) is fixed to the upper end of the cylinder (13), a first ear plate (15) is fixed to the upper end of the sealing plate (14), and the first ear plate (15) is rotatably connected to the second ear plate (16).

4. The steel pipe heat treatment device according to claim 1, characterized in that: A counterweight block (17) is fixed to the lower end of the sealing plate (14).

5. The steel pipe heat treatment device according to claim 1, characterized in that: Two baffles (7) are provided at the upper end of the lower conveyor belt (6), and the space between the two baffles (7) corresponds to the inlet (4) and the outlet (5). The baffle (7) above the lower conveyor belt (6) is fixedly connected to the shell of the upper conveyor belt (11) via a plurality of connecting rods (18).

6. The steel pipe heat treatment device according to claim 1, characterized in that: The telescopic assembly is a telescopic rod (12), the number of the telescopic rods (12) is four, the four corners of the shell of the upper conveyor belt (11) are respectively fixedly connected to the upper ends of the four telescopic rods (12), and the lower ends of the telescopic rods (12) are fixedly connected to the shell of the lower conveyor belt (6) below the upper conveyor belt (11).

7. The steel pipe heat treatment device according to claim 1, characterized in that: An upper support plate (10) is arranged between the upper straight portion and the lower straight portion of the upper conveyor belt (11), the upper support plate (10) is in sliding contact with the upper end of the lower straight portion of the upper conveyor belt (11), the upper support plate (10) is fixedly connected to the shell of the upper conveyor belt (11), and a lower support plate (9) is fixed inside the lower conveyor belt (6), the upper end of the lower support plate (9) is in sliding contact with the lower end of the upper straight portion of the lower conveyor belt (6).

8. The steel pipe heat treatment device according to claim 1, characterized in that: There are two heaters (2), and the two heaters (2) are respectively fixed in the heating kiln (1) on the upper and lower sides of the plurality of guide rollers (3).

9. The steel pipe heat treatment device according to claim 1, characterized in that: Support legs (8) are fixed at the four corners of the shell of the lower conveyor belt (6).

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