Quenching heating furnace for seamless steel pipe plug production

Abstract

The utility model is suitable for the seamless steel pipe top head production technical field provides a kind of quenching heating furnace for seamless steel pipe top head production, including furnace body, two support plates are horizontally arranged in furnace body inner chamber bottom, the placing plate is slidably arranged on two support plates, and a plurality of placing seats are arranged at the top of placing plate at intervals.The quenching heating furnace for seamless steel pipe top head production places different specifications of seamless steel pipe top head in the V-shaped groove of placing seat on placing plate, then moves placing plate to the inside of furnace body, then drives furnace cover to close, and placing plate moves to furnace body, by adjusting first friction plate to target position, first friction plate is lifted and contacted with top head, by reciprocating motion, top head is rotated along the direction of V-shaped groove radian, furnace body starts heating system, and the rotating top head is evenly quenched, to avoid the coarse grain caused by local overheating, ensure that the top head inside forms uniform fine martensite structure, reduce thermal stress concentration, reduce the risk of internal micro-cracks of top head.

Description

Technical Field

[0001] This utility model belongs to the field of seamless steel pipe mandrel production technology, and in particular relates to a quenching heating furnace for seamless steel pipe mandrel production. Background Technology

[0002] The quenching furnace is an indispensable piece of equipment in the production process of seamless steel pipe mandrels. Its main function is to heat the mandrel to a suitable temperature, transforming its internal structure into austenite, and then rapidly cooling it to form a hardened structure, thereby improving the hardness and strength of the mandrel. This process is crucial for improving the wear resistance, impact resistance, and service life of the mandrel.

[0003] Existing quenching furnaces used for seamless steel pipe mandrel production typically employ an integral heating chamber, making it difficult to achieve gradient temperature control. Furthermore, due to factors such as heating methods and furnace structure, the mandrel often experiences uneven heating during the heating process. This unevenness not only affects the hardness and strength of the mandrel but also leads to quality problems such as cracks and deformation during quenching. Utility Model Content

[0004] This utility model provides a quenching heating furnace for the production of seamless steel pipe mandrels, aiming to solve the problem of uneven heating of the mandrels during the heating process. This unevenness not only affects the hardness and strength of the mandrels, but also leads to quality problems such as cracks and deformation of the mandrels during the quenching process.

[0005] This utility model is implemented as follows: a quenching heating furnace for the production of seamless steel pipe tops includes a furnace body. Two support plates are horizontally arranged at the bottom of the inner cavity of the furnace body. Placement plates are slidably arranged on the two support plates. Several placement seats are spaced apart on the top of the placement plates. Each placement seat has a V-shaped groove in the middle. Every two placement seats form a support.

[0006] A plurality of receiving boxes are movably arranged inward on one side of the placement plate. A first connecting plate is movably arranged on the top of each receiving box. A first friction plate for assisting the rolling of the seamless steel pipe head is inclinedly arranged at one end of each first connecting plate. A second connecting plate is movably arranged on the other side of the placement plate. A second friction plate for limiting the rolling of the seamless steel pipe head is fixedly connected to one end of the second connecting plate.

[0007] Preferably, each of the two support plates is provided with an electric slide rail, and a sliding block is slidably provided on the surface of each electric slide rail, and the placement plate is fixedly connected to the surface of the sliding block.

[0008] Preferably, the bottom of the placement plate is fixedly connected to a roller, and the roller is slidably connected to the bottom of the furnace cavity.

[0009] Preferably, a first receiving groove is provided on one side of the placement plate, and a first electric telescopic rod is horizontally arranged in the first receiving groove. One end of the first electric telescopic rod is fixedly connected to the surface of the receiving box. A first motor is horizontally fixedly connected to the inner cavity of the receiving box. A rotating shaft is fixedly connected to the output shaft of the first motor. A gear is fixedly connected to the surface of the rotating shaft. A rack that meshes with the gear is slidably connected to the receiving box. The rack is fixedly connected to the first connecting plate.

[0010] Preferably, a second receiving groove is provided on the other side of the placement plate, and a second electric telescopic rod is arranged horizontally in the second receiving groove. One end of the second electric telescopic rod is fixedly connected to the second connecting plate.

[0011] Preferably, a furnace cover is rotatably provided at the front end of the furnace body, a drive box is provided at the front end of the furnace body, a second motor is horizontally arranged inside the drive box, and the top of the furnace cover is fixedly connected to the output shaft of the second motor.

[0012] Beneficial effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a quenching heating furnace for the production of seamless steel pipe mandrels. Seamless steel pipe mandrels of different specifications are placed in the V-shaped groove of the placement seat on the placement plate. Then, the placement plate is moved into the furnace body, and the furnace cover is driven to close. The placement plate is moved into the furnace body, and the first friction plate is adjusted to the target position so that the first friction plate rises and falls and contacts the mandrel. Through reciprocating motion, the mandrel is driven to rotate along the arc direction of the V-shaped groove. The furnace body starts the heating system to uniformly quench the rotating mandrel, avoiding local overheating that leads to coarse grains, ensuring that a uniform and fine martensitic structure is formed inside the mandrel, reducing thermal stress concentration, and reducing the risk of microcracks inside the mandrel. Attached Figure Description

[0014] Figure 1 This is a side sectional view of the present invention.

[0015] Figure 2 This is a schematic diagram of the front structure of this utility model;

[0016] Figure 3 This is a top sectional view of the structure of this utility model.

[0017] In the diagram: 1. Furnace body; 2. Support plate; 3. Placement plate; 4. Placement seat; 5. V-groove; 6. Sliding block; 7. First electric telescopic rod; 8. Receiving box; 9. Rotating shaft; 10. Gear; 11. Rack; 12. First friction plate; 13. First connecting plate; 14. Second electric telescopic rod; 15. Second connecting plate; 16. Second friction plate; 17. Drive box; 18. First motor; 19. Furnace cover; 20. Roller; 21. Electric slide rail; 22. Second motor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Please see Figure 1-3 This utility model provides a technical solution: a quenching heating furnace for the production of seamless steel pipe tops, including a furnace body 1. Two support plates 2 are horizontally arranged at the bottom of the inner cavity of the furnace body 1. Placement plates 3 are slidably arranged on the two support plates 2. Several placement seats 4 are spaced apart on the top of the placement plates 3. Each placement seat 4 has a V-shaped groove 5 in the middle. Every two placement seats 4 form a support.

[0020] Furnace body 1 is an integral heating chamber.

[0021] V-groove 5 is used to accommodate seamless steel pipe heads of different sizes.

[0022] Multiple supports are spaced at different distances to accommodate seamless steel pipe heads of varying lengths.

[0023] The spacing between the placement plate 3 and the support plate 2 ensures a safe distance for the placement plate 3 to move outside the furnace body 1.

[0024] After the tops of multiple seamless steel pipes are placed, they are moved into the furnace body 1 by the placement plate 3 for quenching and heating.

[0025] A plurality of receiving boxes 8 are movably arranged inward on one side of the placement plate 3. A first connecting plate 13 is movably arranged on the top of each receiving box 8. A first friction plate 12 for assisting the rolling of the seamless steel pipe head is inclinedly arranged at one end of each first connecting plate 13. A second connecting plate 15 is movably arranged on the other side of the placement plate 3. A second friction plate 16 for limiting the rolling of the seamless steel pipe head is fixedly connected to one end of the second connecting plate 15.

[0026] In this embodiment, after the placement plate 3 moves into the furnace body 1, the furnace body 1 is driven to quench and heat it. During the heating process, the seamless steel pipe head is rotated on the placement seat 4 of the V-groove 5 by driving the first friction plate 12 and the second friction plate 16 to ensure that the seamless steel pipe head is heated evenly during the heating process.

[0027] When rotation is required, the second friction plate 16 is first driven to contact the seamless steel pipe head, and then the first friction plate 12 is driven to rise and fall, so that it rubs against the seamless steel pipe head, causing the seamless steel pipe head to rotate along the arc direction of the V-groove 5, ensuring uniform heating during heating.

[0028] The second friction plate 16 maintains slight pressure to prevent the top head from sliding off course, while the first friction plate 12 provides active driving force.

[0029] Furthermore, each of the two support plates 2 is provided with an electric slide rail 21, and a sliding block 6 is slidably provided on the surface of each electric slide rail 21. The placement plate 3 is fixedly connected to the surface of the sliding block 6.

[0030] In this embodiment, the control system sends a command to drive the sliding block 6 to move along the slide rail, thereby moving the placement plate 3 outward or inward into the furnace body 1, so that the workpieces on the placement plate 3 can be loaded and removed.

[0031] Furthermore, a roller 20 is fixedly connected to the bottom of the placement plate 3, and the roller 20 is slidably connected to the bottom of the inner cavity of the furnace body 1.

[0032] In this embodiment, the roller 20 contacts the bottom of the inner cavity of the furnace body 1, thereby reducing the load on the support plate 2 and ensuring the stability of the placement plate 3 during movement.

[0033] Furthermore, a first receiving groove is provided on one side of the placement plate 3, and a first electric telescopic rod 7 is arranged horizontally in the first receiving groove. One end of the first electric telescopic rod 7 is fixedly connected to the surface of the receiving box 8. A first motor 18 is fixedly connected horizontally in the inner cavity of the receiving box 8. A rotating shaft 9 is fixedly connected to the output shaft of the first motor 18. A gear 10 is fixedly connected to the surface of the rotating shaft 9. A rack 11 that meshes with the gear 10 is slidably connected to the receiving box 8. The rack 11 is fixedly connected to the first connecting plate 13.

[0034] In this embodiment, when it is necessary to drive the seamless steel pipe mandrel to rotate, the first electric telescopic rod 7 is first activated to push the receiving box 8 to move laterally and adjust it to the target position close to the mandrel. Then, the first motor 18 drives the rotating shaft 9 to rotate, which drives the gear 10 to rotate. The gear 10 meshes with the rack 11, converting the rotational motion into the linear motion of the rack 11, which pushes the first connecting plate 13 to rise and fall. The first connecting plate 13 drives the first friction plate 12 to rise and fall, so that the first friction plate 12 contacts the mandrel. After the first friction plate 12 contacts the mandrel, it drives the mandrel to rotate along the arc direction of the V-groove 5 by driving the rack 11 to rise and fall, ensuring that each surface of the mandrel can be heated evenly.

[0035] Furthermore, a second receiving groove is provided on the other side of the placement plate 3, and a second electric telescopic rod 14 is arranged horizontally in the second receiving groove. One end of the second electric telescopic rod 14 is fixedly connected to the second connecting plate 15.

[0036] In this embodiment, the second electric telescopic rod 14 pushes the second connecting plate 15 to move laterally, so that the second friction plate 16 is close to the side of the top head. The second electric telescopic rod 14 finely adjusts the position of the second connecting plate 15 and applies appropriate pressure to prevent the top head from sliding or deviating.

[0037] Furthermore, a furnace cover 19 is rotatably provided at the front end of the furnace body 1, a drive box 17 is provided at the front end of the furnace body 1, a second motor 22 is arranged horizontally inside the drive box 17, and the top of the furnace cover 19 is fixedly connected to the output shaft of the second motor 22.

[0038] In this embodiment, the furnace cover 19 is hinged to the furnace body 1.

[0039] Start the second motor 22, and the output shaft rotates clockwise, driving the furnace cover 19 to rotate around the hinge shaft until it is fully opened. After the furnace cover 19 is opened, the placement plate 3 is moved into / out of the furnace body 1 by the roller 20 or the electric slide rail 21.

[0040] The working principle and usage process of this utility model are as follows: After the utility model is installed, seamless steel pipe tops of different specifications are placed in the V-groove 5 of the placement seat 4 on the placement plate 3. Then, the placement plate 3 is moved into the furnace body 1. Next, the furnace cover 19 is rotated around the hinge axis and closed by starting the second motor 22. After the placement plate 3 is moved into the furnace body 1, the receiving box 8 is moved laterally by the first electric telescopic rod 7 to adjust the first friction plate 12 to the target position. The first motor 18 drives the gear 10 and rack 11 to drive the first friction plate 12 to rise and fall and contact the top. Through reciprocating motion, the top rotates along the arc direction of the V-groove 5. The second electric telescopic rod 14 pushes the second friction plate 16 to move laterally and applies slight pressure to prevent the top from sliding off course. The furnace body 1 starts the heating system to uniformly quench the rotating top. After heating is completed, the first and second electric telescopic rods 14 retract, causing the friction plate to detach from the top. The electric slide rail 21 drives the placement plate 3 to move out of the furnace body 1, and the furnace cover 19 is closed, completing one quenching cycle.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quenching heating furnace for producing seamless steel pipe mandrels, comprising a furnace body (1), characterized in that: The furnace body (1) has two support plates (2) arranged horizontally at the bottom of the inner cavity. Placement plates (3) are slidably arranged on the two support plates (2). Several placement seats (4) are arranged at intervals on the top of the placement plates (3). Each placement seat (4) has a V-shaped groove (5) in the middle. Every two placement seats (4) form a support. A plurality of receiving boxes (8) are provided at intervals on one side of the placement plate (3), and a first connecting plate (13) is provided on the top of each receiving box (8) in a lifting manner. A first friction plate (12) for assisting the rolling of the seamless steel pipe head is provided at one end of each first connecting plate (13). A second connecting plate (15) is provided on the other side of the placement plate (3), and a second friction plate (16) for limiting the rolling of the seamless steel pipe head is fixedly connected to one end of the second connecting plate (15).

2. The quenching heating furnace for seamless steel pipe mandrel production as described in claim 1, characterized in that: Both of the support plates (2) are provided with electric slide rails (21), and each electric slide rail (21) is slidably provided with a sliding block (6) on its surface. The placement plate (3) is fixedly connected to the surface of the sliding block (6).

3. The quenching heating furnace for seamless steel pipe mandrel production as described in claim 1, characterized in that: The bottom of the placement plate (3) is fixedly connected to a roller (20), and the roller (20) is slidably connected to the bottom of the inner cavity of the furnace body (1).

4. The quenching heating furnace for seamless steel pipe mandrel production as described in claim 1, characterized in that: The placement plate (3) has a first receiving groove on one side, and a first electric telescopic rod (7) is arranged horizontally in the first receiving groove. One end of the first electric telescopic rod (7) is fixedly connected to the surface of the receiving box (8). A first motor (18) is fixedly connected horizontally in the inner cavity of the receiving box (8). A rotating shaft (9) is fixedly connected to the output shaft of the first motor (18). A gear (10) is fixedly connected to the surface of the rotating shaft (9). A rack (11) that meshes with the gear (10) is slidably connected to the receiving box (8). The rack (11) is fixedly connected to the first connecting plate (13).

5. The quenching heating furnace for seamless steel pipe mandrel production as described in claim 1, characterized in that: A second receiving groove is provided on the other side of the placement plate (3), and a second electric telescopic rod (14) is arranged horizontally in the second receiving groove. One end of the second electric telescopic rod (14) is fixedly connected to the second connecting plate (15).

6. The quenching heating furnace for seamless steel pipe mandrel production as described in claim 1, characterized in that: A furnace cover (19) is rotatably provided at the front end of the furnace body (1). A drive box (17) is provided at the front end of the furnace body (1). A second motor (22) is arranged horizontally inside the drive box (17). The top of the furnace cover (19) is fixedly connected to the output shaft of the second motor (22).

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