An inner wall protruding type cooling device for a large-diameter seamless steel pipe

Abstract

This utility model discloses an inner wall-extending cooling device for large-diameter seamless steel pipes, relating to the field of seamless steel pipe cooling technology. It includes a support base with a groove on its upper surface, a connecting block mounted on the left side of the support base, a steel pipe body mounted on an electric conveying roller, and a return trough on the rear side of the groove. In this inner wall-extending cooling device for large-diameter seamless steel pipes, used coolant flows into a collection tank via the return trough. After impurities are filtered through an internal filter, it is transported to a water storage tank via a connecting pipe, and then pumped by a water pump through inlet and outlet pipes into a transition tank, resupplying the cooling nozzles of the main pipeline, forming a closed-loop circulation system. This reduces coolant consumption and lowers production water costs. The annularly distributed cooling nozzles are evenly arranged along the L-shaped main pipeline, providing comprehensive coverage of the inner wall of the steel pipe body, ensuring uniform cooling.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe cooling technology, specifically to an inner wall-extending cooling device for large-diameter seamless steel pipes. Background Technology

[0002] Large-diameter seamless steel pipes are widely used in petrochemical, natural gas transportation, water conservancy projects, and power pipelines due to their high strength, corrosion resistance, and high pressure resistance. Their production process involves multiple hot-working steps, including hot rolling, piercing, and sizing. After high-temperature forming, the steel pipes undergo cooling treatment to control the material's microstructure, ensure that mechanical properties meet standards, and prevent defects such as deformation and cracking caused by uneven cooling and internal stress.

[0003] For example, Chinese utility model patent application number 202020693909.0 discloses an inner wall cooling system for an online cooling process of hot-rolled seamless steel pipes. This system includes an automated control device, multiple water spray devices, and at least one air blowing device. The water spray devices are located at the inlet, intervals, and outlet of the cooling spray ring group. The air blowing device is located at the top of the outlet end face of the cooling spray ring group after the water spray devices. High-pressure cooling water is sprayed onto the inner wall of the steel pipe through the water spray devices, and the air blowing device increases the flow rate of the cooling water. However, this device still has certain shortcomings. It is not convenient to uniformly cool the inner wall of the steel pipe, resulting in low cooling efficiency. At the same time, it is not convenient to recycle the coolant after use. Large-diameter seamless steel pipes consume a lot of coolant during the cooling process. If discharged directly, it will not only increase the cost of production water, but also cause pollution to the soil and water bodies around the factory due to impurities such as iron oxide scale and metal shavings mixed in the coolant. This does not meet the strict requirements of environmental protection regulations for industrial wastewater discharge.

[0004] Therefore, we propose an inner wall-extending cooling device for large-diameter seamless steel pipes to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide an inner wall-extending cooling device for large-diameter seamless steel pipes. This device addresses the problems mentioned in the background art, such as the inconvenience of uniform cooling of the inner wall of steel pipes, low cooling efficiency, and difficulty in recycling the used coolant. Furthermore, the large amount of coolant consumed during the cooling process of large-diameter seamless steel pipes, if directly discharged, not only increases production water costs but also pollutes the surrounding soil and water bodies due to impurities such as iron oxide scale and metal fragments mixed in the coolant, failing to meet the stringent environmental regulations for industrial wastewater discharge.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an inner wall-extending cooling device for large-diameter seamless steel pipes, comprising a support base, a groove on the upper surface of the support base, an electric conveying roller installed inside the groove, a connecting block installed on the left side of the support base, a steel pipe body mounted on the electric conveying roller, a return groove on the rear side of the groove, a first connecting frame and a second connecting frame respectively installed on the front and rear sides of the upper surfaces of the support base and the connecting block, a ball screw installed in the second connecting frame via a bearing seat, a second slider installed on the ball screw, a connecting plate installed above the second slider, a support plate installed above the connecting plate via a multi-stage electric telescopic rod, a transition box installed above the support plate, a main pipe installed below the transition box, a cooling nozzle installed on the main pipe, and a scale plate installed on the front upper surface of the connecting plate; A water storage tank and a collection tank are installed sequentially from left to right on the rear side of the connecting block and the support base, and a water pump is installed above the water storage tank.

[0007] Preferably, a guide rod is installed inside the first connecting frame, and a first slider is sleeved on the guide rod. The first slider is slidably connected to the guide rod, and both the first slider and the second slider are connected to the connecting plate.

[0008] With the above structural design, the guide rod in the first connecting frame slides in cooperation with the first slider, and together with the ball screw and the second slider in the second connecting frame, they support the connecting plate, ensuring that it moves smoothly without deviation and ensuring that the main pipeline is accurately inserted into the steel pipe body.

[0009] Preferably, the guide rod and the ball screw are parallel to each other, a servo motor is installed on the right side of the second connecting frame, and the left side of the servo motor is connected to the ball screw through an output shaft.

[0010] With the above structural design, the servo motor drives the ball screw to rotate. Because the guide rod is parallel to the ball screw, it drives the connecting plate to move in a straight line, realizing the precise position adjustment of the main pipe along the axial direction of the steel pipe body, ensuring that the cooling range covers the entire inner wall.

[0011] Preferably, the transition box is connected to the main pipeline, the main pipeline has an L-shaped structure design, multiple cooling nozzles are provided, and the cooling nozzles are distributed in a ring structure. A conical block is installed on the right side of the main pipeline, and a rubber head is installed on the right side of the conical block.

[0012] With the above structural design, the transition box delivers coolant to the L-shaped main pipe, and the annularly distributed cooling nozzles spray coolant evenly onto the inner wall of the steel pipe body; the conical block and rubber head work together with the scale plate to calibrate the center line of the main pipe and the steel pipe body, and the rubber head avoids damage to the inner wall of the steel pipe body when in contact.

[0013] Preferably, the water pump is equipped with an inlet pipe and an outlet pipe on its left and right sides, respectively. The inlet pipe is connected to the inside of the water storage tank, and the outlet pipe is connected to the inside of the transition tank.

[0014] With the above structural design, the water pump draws coolant from the water storage tank through the inlet pipe and delivers it to the transition tank through the outlet pipe, providing a continuous supply of coolant to the cooling nozzles and ensuring the continuous cooling process.

[0015] Preferably, the water storage tank and the collection tank are connected by a connecting pipe, the collection tank is equipped with a filter screen, and the collection tank is connected to the groove on the support base through a return channel.

[0016] With the above structural design, the collection box collects the used coolant through the return channel, and after the internal filter screen filters out impurities, it is sent to the water storage tank for recycling through the connecting pipe, which reduces water waste and avoids pollution.

[0017] Preferably, a semiconductor cooling chip is installed on the outside of the water storage tank, and the cold end of the semiconductor cooling chip is connected to the water storage tank.

[0018] With the above structural design, the semiconductor cooling chip on the outside of the water tank reduces the temperature of the coolant, ensuring that the coolant sprayed onto the inner wall of the steel pipe remains at a low temperature, thereby improving cooling efficiency.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the inner wall extension cooling device for large-diameter seamless steel pipes: 1. Achieve efficient recycling of coolant, reducing costs and pollution. After use, the coolant flows into the collection tank through the return tank. After impurities are filtered out by the internal filter, it is transported to the storage tank through the connecting pipe. The semiconductor cooling chip on the outside of the storage tank lowers the temperature of the coolant, and then the water pump pumps it into the transition tank through the inlet and outlet pipes to resupply the cooling nozzles of the main pipeline, forming a closed-loop circulation system. This design greatly reduces coolant consumption, lowers production water costs, and avoids environmental pollution caused by the direct discharge of coolant containing impurities, thus meeting environmental protection requirements. 2. Ensure uniform and precise cooling to improve the cooling quality of steel pipes. The annularly distributed cooling nozzles are evenly arranged along the L-shaped main pipe, providing comprehensive coverage of the inner wall of the steel pipe and ensuring uniform cooling. The use of conical blocks, rubber heads, and a graduated plate allows for quick alignment of the main pipe's centerline with the steel pipe body. Steel pipes from the same batch can be directly positioned using the graduated plate, reducing repetitive calibration time. A servo motor drives a ball screw to move the main pipe axially, and combined with the stable support of a guide rod, ensures that the cooling range covers the entire inner wall of the steel pipe, preventing defects such as deformation and cracking caused by insufficient or excessive cooling, thus improving product quality stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall main structure of this utility model; Figure 2 This is a schematic diagram of the overall rear view structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the groove in this utility model; Figure 4 This is a schematic diagram of the structure of the main pipeline of this utility model when it is pulled out; Figure 5 This is a schematic diagram of the main pipeline structure of this utility model.

[0021] In the diagram: 1. Support base; 2. Groove; 3. Connecting block; 4. Electric conveying roller; 5. Steel pipe body; 6. Return groove; 7. First connecting frame; 8. Second connecting frame; 9. Guide rod; 10. Ball screw; 11. First slider; 12. Second slider; 13. Servo motor; 14. Connecting plate; 15. Multi-stage electric telescopic rod; 16. Support plate; 17. Transition box; 18. Main pipe; 19. Cooling nozzle; 20. Conical block; 21. Rubber head; 22. Scale plate; 23. Water storage tank; 24. Collection box; 25. Water pump; 26. Inlet pipe; 27. Outlet pipe; 28. Connecting pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5This utility model provides a technical solution: an inner wall-extending cooling device for large-diameter seamless steel pipes, comprising a support base 1, a groove 2, a connecting block 3, an electric conveying roller 4, a steel pipe body 5, a return groove 6, a first connecting frame 7, a second connecting frame 8, a guide rod 9, a ball screw 10, a first slider 11, a second slider 12, a servo motor 13, a connecting plate 14, a multi-stage electric telescopic rod 15, a support plate 16, a transition box 17, a main pipe 18, a cooling nozzle 19, a conical block 20, a rubber head 21, a scale plate 22, a water storage tank 23, a collection box 24, a water pump 25, an inlet pipe 26, an outlet pipe 27, and a connecting pipe 28. The upper surface of the support base 1 has a groove 2, and the electric conveying roller 4 is installed inside the groove 2. A connecting block 3 is installed on the left side of the support base 1. A steel pipe body 5 is installed on the electric conveying roller 4. A return groove 6 is opened on the rear side of the groove 2. A first connecting frame 7 and a second connecting frame 8 are respectively installed on the front and rear sides of the upper surface of the support base 1 and the connecting block 3. A ball screw 10 is installed in the second connecting frame 8 through a bearing seat. A second slider 12 is installed on the ball screw 10. A guide rod 9 is installed inside the first connecting frame 7. A first slider 11 is sleeved on the guide rod 9. The first slider 11 is slidably connected to the guide rod 9. Both the first slider 11 and the second slider 12 are connected to the connecting plate 14. The guide rod 9 in the first connecting frame 7 slides with the first slider 11, and together with the ball screw 10 and the second slider 12 in the second connecting frame 8, they provide support. Connecting plate 14 ensures smooth and stable movement without deviation, guaranteeing the precise insertion of main pipe 18 into steel pipe body 5. Guide rod 9 and ball screw 10 are parallel to each other. Servo motor 13 is installed on the right side of second connecting frame 8, and the left side of servo motor 13 is connected to ball screw 10 via output shaft. Servo motor 13 drives ball screw 10 to rotate. Because guide rod 9 and ball screw 10 are parallel, connecting plate 14 moves linearly, achieving precise position adjustment of main pipe 18 along the axial direction of steel pipe body 5, ensuring cooling coverage of the entire inner wall. Connecting plate 14 is installed above second slider 12, and support plate 16 is installed above connecting plate 14 via multi-stage electric telescopic rod 15. Transition box 17 is installed above support plate 16. The main pipe 18 is installed below the box 17, and cooling nozzles 19 are installed on the main pipe 18. A scale plate 22 is installed on the upper front surface of the connecting plate 14. The transition box 17 is connected to the main pipe 18. The main pipe 18 has an L-shaped structure design. Multiple cooling nozzles 19 are provided and distributed in a ring structure. A conical block 20 is installed on the right side of the main pipe 18, and a rubber head 21 is installed on the right side of the conical block 20. The transition box 17 delivers coolant to the L-shaped main pipe 18. The ring-shaped cooling nozzles 19 spray coolant evenly onto the inner wall of the steel pipe body 5. The conical block 20 and the rubber head 21, together with the scale plate 22, calibrate the center line of the main pipe 18 and the steel pipe body 5. The rubber head 21 avoids damage to the inner wall of the steel pipe body 5 when in contact.

[0024] A water storage tank 23 and a collection tank 24 are installed sequentially from left to right on the rear side of the connecting block 3 and the support base 1. A water pump 25 is installed above the water storage tank 23. An inlet pipe 26 and an outlet pipe 27 are installed on the left and right sides of the water pump 25, respectively. The inlet pipe 26 is connected to the inside of the water storage tank 23, and the outlet pipe 27 is connected to the inside of the transition tank 17. The water pump 25 draws coolant from the water storage tank 23 through the inlet pipe 26 and delivers it to the transition tank 17 through the outlet pipe 27, providing a continuous coolant supply to the cooling nozzle 19 and ensuring continuous cooling. The water storage tank 23 and the collection tank 24 are connected by a connecting pipe 2. The system is connected in phase 8. The collection box 24 is equipped with a filter screen inside. The collection box 24 is connected to the groove 2 on the support base 1 through the return channel 6. The collection box 24 collects the used coolant through the return channel 6. After the internal filter screen filters out impurities, the coolant is sent to the water storage tank 23 for recycling through the connecting pipe 28, which reduces water waste and avoids pollution. The outside of the water storage tank 23 is equipped with a semiconductor cooling chip, and the cold end of the semiconductor cooling chip is connected to the water storage tank 23. The semiconductor cooling chip outside the water storage tank 23 reduces the temperature of the coolant, ensuring that the coolant sprayed onto the inner wall of the steel pipe body 5 maintains a low temperature and improves cooling efficiency.

[0025] It should be noted that the electric conveying roller 4 and the semiconductor cooling chip mentioned in this application are existing technologies in the field, so their internal structure and working principle will not be described in detail.

[0026] Working principle: When using the inner wall extension cooling device for large-diameter seamless steel pipes, firstly, the steel pipe body 5 is placed on the electric conveying roller 4 in the groove 2 of the support seat 1, and the electric conveying roller 4 conveys the steel pipe body 5 to the cooling station.

[0027] When calibrating the center line of the main pipe 18 and the steel pipe body 5, the support plate 16 and the main pipe 18 are moved downward by the multi-stage electric telescopic rod 15, so that the cone block 20 and rubber head 21 on the right side of the main pipe 18 move downward and the rubber head 21 abuts against the upper surface of the left end of the steel pipe body 5. The position of the support plate 16 on the scale plate 22 is recorded. Then the support plate 16 is moved downward by the radius of the steel pipe body 5 so that the center line of the main pipe 18 is aligned with the center line of the steel pipe body 5. The same batch of steel pipes can be directly referenced for positioning at this scale.

[0028] Start the servo motor 13 to drive the ball screw 10 in the second connecting frame 8 to rotate, which in turn drives the second slider 12 and the connecting plate 14 to move. The guide rod 9 in the first connecting frame 7 cooperates with the first slider 11 to ensure that the connecting plate 14 moves smoothly, so that the main pipe 18 extends into the interior along the axial direction of the steel pipe body 5.

[0029] The semiconductor cooling chip outside the water storage tank 23 lowers the temperature of the coolant. The water pump 25 draws coolant through the inlet pipe 26, sends it to the transition tank 17 through the outlet pipe 27, and then delivers it to the ring-shaped cooling nozzles 19 through the L-shaped main pipe 18, spraying the coolant evenly onto the inner wall of the steel pipe body 5.

[0030] After use, the coolant flows into the collection tank 24 through the return channel 6 behind the groove 2. After impurities are filtered out by the internal filter, it flows back to the water storage tank 23 for recycling through the connecting pipe 28. After cooling is complete, the servo motor 13 reverses to remove the main pipe 18 from the steel pipe body 5. The electric conveyor roller 4 transports the steel pipe body 5 to the next station, and the device resets to await the next operation, thus completing a series of tasks. Content not described in detail in this specification is prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An inner wall-extending cooling device for large-diameter seamless steel pipes, comprising a support base (1), wherein a groove (2) is formed on the upper surface of the support base (1), and an electric conveying roller (4) is installed inside the groove (2), a connecting block (3) is installed on the left side of the support base (1), and a steel pipe body (5) is disposed on the electric conveying roller (4), characterized in that: A return groove (6) is provided on the rear side of the groove (2). A first connecting frame (7) and a second connecting frame (8) are respectively installed on the front and rear sides of the upper surface of the support base (1) and the connecting block (3). A ball screw (10) is installed in the second connecting frame (8) through a bearing seat. A second slider (12) is installed on the ball screw (10). A connecting plate (14) is installed above the second slider (12). A support plate (16) is installed above the connecting plate (14) through a multi-stage electric telescopic rod (15). A transition box (17) is installed above the support plate (16). A main pipe (18) is installed below the transition box (17). A cooling nozzle (19) is installed on the main pipe (18). A scale plate (22) is installed on the front upper surface of the connecting plate (14). A water storage tank (23) and a collection tank (24) are installed on the rear side of the connecting block (3) and the support base (1) from left to right, and a water pump (25) is installed above the water storage tank (23).

2. The inner wall extension cooling device for large-diameter seamless steel pipes according to claim 1, characterized in that: The first connecting frame (7) is equipped with a guide rod (9), and a first slider (11) is sleeved on the guide rod (9). The first slider (11) is slidably connected to the guide rod (9), and both the first slider (11) and the second slider (12) are connected to the connecting plate (14).

3. The inner wall extension cooling device for large-diameter seamless steel pipes according to claim 2, characterized in that: The guide rod (9) is parallel to the ball screw (10). A servo motor (13) is installed on the right side of the second connecting frame (8). The left side of the servo motor (13) is connected to the ball screw (10) through the output shaft.

4. The inner wall extension cooling device for large-diameter seamless steel pipes according to claim 1, characterized in that: The transition box (17) is connected to the main pipe (18). The main pipe (18) has an L-shaped structure design. Multiple cooling nozzles (19) are provided and distributed in a ring structure. A conical block (20) is installed on the right side of the main pipe (18), and a rubber head (21) is installed on the right side of the conical block (20).

5. The inner wall extension cooling device for large-diameter seamless steel pipes according to claim 1, characterized in that: The water pump (25) is equipped with an inlet pipe (26) and an outlet pipe (27) on its left and right sides respectively. The inlet pipe (26) is connected to the interior of the water storage tank (23), and the outlet pipe (27) is connected to the interior of the transition box (17).

6. The inner wall extension cooling device for large-diameter seamless steel pipes according to claim 5, characterized in that: The water storage tank (23) and the collection tank (24) are connected by a connecting pipe (28). The collection tank (24) is equipped with a filter screen inside. The collection tank (24) is connected to the groove (2) on the support base (1) through the return channel (6).

7. The inner wall extension cooling device for large-diameter seamless steel pipes according to claim 6, characterized in that: The water storage tank (23) is equipped with a semiconductor cooling chip on its exterior, and the cold end of the semiconductor cooling chip is connected to the water storage tank (23).

Images