A mandrel cooling device for seamless steel tube production and processing and a cooling method thereof

Abstract

The application discloses a mandrel cooling device for seamless steel pipe production and machining and a cooling method thereof and belongs to the technical field of cooling devices. The mandrel cooling device for seamless steel pipe production and machining comprises a cooling water tank and a conveying assembly, a spraying assembly is communicated with the top of the cooling water tank, a pressing assembly is arranged on the cooling water tank and a support, the surface of the mandrel is arranged between the pressing assembly and a conveying roller in a close manner, a filter assembly is arranged on one side of the cooling water tank, the filter assembly is used for filtering impurities in the cooled water, and the water is sprayed onto the surface of the mandrel through the spraying assembly, the mandrel is close pressed by the conveying roller and the pressing roller, the deformation of the mandrel in the cooling process is prevented, the filter plate is communicated between the cooling water tank and a filter tank, the cooled water is filtered after being recovered and then is repeatedly used in the cooling water tank, and the problem of poor filtering is effectively avoided when the filter plate is blocked due to the attachment of impurities in the filtering process.

Description

Technical Field

[0001] This invention relates to the field of cooling device technology, and in particular to a mandrel cooling device and cooling method for seamless steel pipe production and processing. Background Technology

[0002] In the seamless steel pipe rolling production line, the mandrel, after returning to the roller conveyor and passing through the mandrel feeding device to the pawl of the mandrel cooling device, often damages the pawl due to its own weight and the inertia of its fall. The impact of the falling mandrel causes cracks at the welded ends of the axle, and the bolts of the intermediate connecting flange are frequently sheared off. This significantly reduces the service life of the bearings, axles, and pawls. Failures necessitate machine shutdown for repairs, impacting seamless steel pipe production output and increasing production costs and worker workload.

[0003] The seamless steel pipe mandrel cooling device, with publication number "CN201783507U", consists of a mandrel return roller conveyor, grate bars, hydraulic cylinders, cooling water tank, mandrel platform, dialing wheel device, and mandrel lubrication roller conveyor. Its features include: the mandrel platform is composed of a support base, baffle plate, shovel platform, and transition platform; the dialing wheel device is composed of a flange, four dialing grippers, dialing wheel shaft, bearings, and bearing housing. This device effectively protects the dialing wheel from impact as the mandrel travels from the return roller conveyor through the mandrel feeding device to the mandrel cooling device, thus avoiding damage to the dialing wheel and preventing the frequent shearing of intermediate connecting flange bolts and the short service life of bearings, shafts, and dialing wheels.

[0004] However, existing mandrels may deform during the cooling process, requiring straightening after cooling, which reduces the production efficiency of seamless steel pipes. At the same time, the water used during cooling cannot be recycled, resulting in a waste of water resources. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art where the mandrel may undergo certain deformation during the cooling process, and straightening of the mandrel is required after cooling, which reduces the production efficiency of seamless steel pipes; at the same time, the water resources used for cooling cannot be recycled, resulting in water waste. Therefore, this invention proposes a mandrel cooling device and cooling method for seamless steel pipe production and processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mandrel cooling device for seamless steel pipe production and processing includes a cooling water tank and a conveying assembly. A spraying assembly is connected to the top of the cooling water tank. The conveying assembly includes equidistantly arrayed conveying rollers and conveying frames disposed at both ends of the conveying rollers. The cooling water tank is disposed at one end of the conveying frames and includes a support disposed at the other end of the conveying frames. A pressure applying assembly is disposed on the cooling water tank and the support to apply pressure to the cooled mandrel, causing the mandrel surface to adhere to the pressure applying assembly and the conveying rollers. A filter assembly is disposed on one side of the cooling water tank to filter impurities from the cooled water before it is sprayed onto the mandrel surface via the spraying assembly.

[0008] Preferably, the spray assembly includes a cooling pipe, the inner wall of which is connected to a spray nozzle, one end of which is connected to a water pump, the spray nozzle facing the core rod, the cooling pipe being connected above the cooling water tank, and a connecting pipe connecting adjacent sets of the cooling pipe.

[0009] Preferably, one end of the conveyor frame is provided with a material guiding assembly, the material guiding assembly includes a support base, and two sets of material guiding rollers are rotatably mounted on the support base. One set of material guiding rollers is connected to a motor at its top end, and both sets of material guiding rollers are provided with gears at their bottom ends, with a transition wheel meshing between the two sets of gears.

[0010] Preferably, the pressure application assembly includes two sets of floating frames and pressure rollers rotatably connected within the two sets of floating frames. Each of the two ends of the outer wall of the floating frame is symmetrically connected with a first support rod. One end of one set of the first support rods is slidably connected to the top of the cooling water tank, and one end of the other two sets of the first support rods is slidably connected to the top of the support.

[0011] Preferably, both the cooling water tank and the support have guide holes at their tops, the first support rod is slidably inserted into the guide holes, the outer wall of the first support rod is provided with a limit plate, and the limit plate is connected to the upper surface of the cooling water tank and the support with a first spring.

[0012] Preferably, the pressure roller has a cavity inside and a water hole through it. One end of the pressure roller is connected to a bend pipe, which is connected to a branch pipe and a cooling pipe.

[0013] Preferably, the filtration assembly includes a filter box disposed on one side of the cooling water tank, wherein the bottom surface of the filter box is 55-75mm lower than the bottom surface of the cooling water tank;

[0014] The filter assembly also includes a guide plate that is inclinedly disposed between the filter box and the support. Two sets of lifting lugs are symmetrically disposed at one end of the guide plate. A second support rod is provided at the top of the support, and the lifting lugs are connected to both ends of the second support rod.

[0015] Preferably, one end of the filter box has a water inlet that matches one end of the guide plate, a floating plate is elastically connected inside the filter box, a wing plate is connected to the floating plate, a second spring is connected between adjacent wing plates, a filter plate is installed inside the filter box at the communication position between the filter box and the cooling water tank, the wing plate is slidably connected to one side of the filter plate, a guide bar is connected to one side of the wing plate, and the guide bar and the filter plate are slidably connected.

[0016] A pad is connected to the bottom of one side of the filter plate, and a guide shaft is connected to the pad. A guide sleeve is connected to the bottom of the floating plate, and the guide shaft is slidably connected to the guide sleeve by a third spring.

[0017] Preferably, the floating frame is connected to connecting shafts on both sides, the guide plate is rotatably connected to a rotating shaft, the rotating shaft has flaps arranged in an equidistant array on its surface, and traction ropes are connected to both ends of the rotating shaft and the connecting shaft.

[0018] A cooling method, based on a mandrel cooling device for seamless steel pipe production and processing, includes the following steps:

[0019] Step 1: Place one end of the mandrel between the two sets of guide rollers, and start the motor to move the mandrel into the conveying assembly;

[0020] Step 2: During the conveying process, the mandrel is pressed against the pressure roller and the conveying roller, and at the same time the water pump is started to spray and cool the mandrel through the spray nozzle.

[0021] Step 3: Cooling water is guided by the guide plate into the filter box, where it filters impurities through the filter plate, and then flows into the cooling water tank. After cooling, it is pumped into the cooling pipe by the water pump to continue cooling the mandrel.

[0022] Compared with the prior art, the present invention provides a mandrel cooling device for seamless steel pipe production and processing, which has the following beneficial effects:

[0023] 1. The mandrel cooling device for seamless steel pipe production and processing uses a pressure roller set above the conveying roller and a floating frame with elastic connection to support the rotating pressure roller, so that the pressure roller and the conveying roller remain in contact during the mandrel conveying process, preventing the mandrel from deforming during the cooling process;

[0024] 2. The mandrel cooling device for seamless steel pipe production and processing uses a filter box to recover and filter cooling water. After the cooling water enters the filter box through the inlet, it hits the wing plate. The change in the impact force of the water flow causes the second spring to move the wing plate against the filter plate under the reciprocating action of force and reset, thereby cleaning the filter plate and preventing the filter plate from being blocked by impurities during the filtration process, effectively avoiding poor filtration caused by blockage.

[0025] 3. The mandrel cooling device for seamless steel pipe production and processing uses a rotating shaft installed inside the guide plate. The power generated by the flow of recovered cooling water inside the guide plate impacts the flapper, thereby driving the rotating shaft to rotate. During the rotation of the shaft, the traction rope can be wound up, thereby pulling the pressure roller inside the floating frame downwards. It always keeps in close contact with the mandrel on the conveying roller and rotates. This not only does not create resistance to the movement of the mandrel, but also ensures that the pressure roller and the conveying roller always squeeze the mandrel, preventing the mandrel from deforming during the cooling process.

[0026] All parts not mentioned in this device are the same as or can be implemented using existing technologies. This invention uses conveying rollers and pressure rollers to press and squeeze the mandrel, which can prevent the mandrel from deforming during the cooling process. A filter plate is used to connect the cooling water tank and the filter box. After the cooling water is recovered, it is filtered and then put back into the cooling water tank for repeated use. In addition, the filter plate is prevented from being blocked by impurities during the filtration process, which effectively avoids poor filtration caused by blockage. Attached Figure Description

[0027] Figure 1 This is a front-view perspective three-dimensional structural diagram of a mandrel cooling device for seamless steel pipe production and processing proposed in this invention;

[0028] Figure 2 This is a rear view of the internal structure of a mandrel cooling device for seamless steel pipe production and processing proposed in this invention.

[0029] Figure 3 This is a partial bottom view of the mandrel cooling device for seamless steel pipe production and processing proposed in this invention;

[0030] Figure 4 This is a cross-sectional view of the pressure roller of a mandrel cooling device for seamless steel pipe production and processing proposed in this invention.

[0031] Figure 5 This is a schematic diagram of the internal structure of the filter box of a mandrel cooling device for seamless steel pipe production and processing proposed in this invention;

[0032] Figure 6 This is a partially enlarged schematic diagram of the wing plate connection structure of a mandrel cooling device for seamless steel pipe production and processing proposed in this invention;

[0033] Figure 7 This is a schematic diagram of the filter plate and wing plate connection structure of a mandrel cooling device for seamless steel pipe production and processing proposed in this invention;

[0034] Figure 8 This is a schematic diagram of the rotating shaft traction pressure roller structure of a mandrel cooling device for seamless steel pipe production and processing proposed in this invention.

[0035] In the diagram: 1. Cooling water tank; 2. Filter box; 3. Support; 4. Conveyor frame; 5. Conveyor roller; 6. Pressure roller; 7. Floating frame; 8. Cooling pipe; 9. Spray nozzle; 10. Water pump; 11. Water hole; 12. First support rod; 13. First spring; 14. Guide roller; 15. Support base; 16. Motor; 17. Lifting lug; 18. Guide plate; 19. Bend; 20. Branch pipe; 21. Cavity; 22. Guide 23. Second support rod; 24. Rotating shaft; 25. Flip plate; 26. Traction rope; 27. Connecting shaft; 28. Gear; 29. ​​Transition wheel; 30. Water inlet; 31. Wing plate; 32. Second spring; 33. Floating plate; 34. Filter plate; 35. Guide shaft; 36. Guide sleeve; 37. Third spring; 38. Pad; 39. Guide bar; 40. Connecting pipe; 41. Limiting plate; 42. Protective cover. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Example:

[0039] Reference Figures 1-8 A mandrel cooling device for seamless steel pipe production and processing includes a cooling water tank 1 and a conveying assembly. The top of the cooling water tank 1 is connected to a spraying assembly. The conveying assembly includes conveying rollers 5 arranged in an equidistant array and conveying frames 4 disposed at both ends of the conveying rollers 5. The cooling water tank 1 is disposed at one end of the conveying frame 4 and also includes a support 3 disposed at the other end of the conveying frame 4.

[0040] In this embodiment, a conveying assembly is provided on the cooling water tank 1 and the support 3. Two sets of conveying frames 4 support and rotate the conveying rollers 5, and the mandrel is conveyed by the conveying rollers 5 and cooled during the conveying process.

[0041] It should be noted that, based on the specifications of the mandrel, those skilled in the art know that a drive device is set at one end of the conveying roller 5 and a transmission component is set between the conveying rollers 5. Activating the drive device can drive the conveying roller 5 to rotate, thereby realizing the conveying of the mandrel.

[0042] The spray assembly includes a cooling pipe 8, with a spray nozzle 9 connected to the inner wall of the cooling pipe 8. One end of the cooling pipe 8 is connected to a water pump 10. The spray nozzle 9 faces the core rod. The cooling pipe 8 is connected above the cooling water tank 1, and a connecting pipe 40 connects two adjacent sets of cooling pipes 8.

[0043] In this embodiment, a cooling pipe 8 is connected to the top of the cooling water tank 1, and a spray nozzle 9 is connected to the inner wall of the cooling pipe 8. During the transport of the mandrel, the water pump 10 is started to pump the cooling water in the cooling water tank 1 into the cooling pipe 8 and spray it onto the surface of the mandrel through the spray nozzle 9.

[0044] A material guiding assembly is provided at one end of the conveyor frame 4. The material guiding assembly includes a support base 15. Two sets of material guiding rollers 14 are rotatably mounted on the support base 15. One set of material guiding rollers 14 is connected to a motor 16 at the top end. Both sets of material guiding rollers 14 are provided with gears 28 at the bottom end. A transition wheel 29 meshes between the two sets of gears 28.

[0045] In this embodiment, a material guiding component is provided at one end of the conveyor frame 4. The material guiding component is used to guide one end of the mandrel onto the conveyor roller 5. For mandrels with smaller specifications, the material guiding component can also be used to push the mandrel forward.

[0046] Specifically, the motor 16 is started, which drives one set of support bases 15 and the guide rollers 14 inside the support bases 15 to rotate, thereby driving the gear 28 at the bottom to rotate. Through the rotation of the transition wheel 29 meshing with the gear 28, the other set of guide rollers 14 is driven to rotate. The two sets of guide rollers 14 rotate relative to each other, and the auxiliary conveying roller 5 guides and conveys the mandrel.

[0047] A pressure-applying assembly is provided on the cooling water tank 1 and the support 3. The pressure-applying assembly is used to apply pressure to the cooling mandrel, so that the surface of the mandrel is fitted between the pressure-applying assembly and the conveying roller 5. The pressure-applying assembly includes two sets of floating frames 7 and pressure rollers 6 rotatably connected in the two sets of floating frames 7. The outer walls of the floating frames 7 are symmetrically connected to the two ends of the first support rods 12. One end of the two sets of first support rods 12 is slidably connected to the top of the cooling water tank 1, and the other two sets of first support rods 12 are slidably connected to the top of the support 3.

[0048] In this embodiment, the pressure roller 6 is rotatably mounted above the conveying roller 5 via two sets of floating frames 7. First support rods 12 are provided on both sides of the floating frames 7 and slide above the cooling water tank 1 and the support 3 respectively, so that the pressure roller 6 used to fit the mandrel can change the distance between the conveying roller 5 and the pressure roller 6 according to the specifications of the mandrel, thereby expanding the applicable range of the pressure application component.

[0049] Both the cooling water tank 1 and the support 3 have guide holes 22 at their tops. The first support rod 12 is slidably inserted into the guide hole 22. The outer wall of the first support rod 12 is provided with a limit plate 41. The limit plate 41 is connected to the upper surface of the cooling water tank 1 and the support 3 respectively with a first spring 13.

[0050] Specifically, the first support rod 12 is slidably inserted into the top of the cooling water tank 1 and the support 3 through the guide hole 22. At the same time, a limiting plate 41 is provided on the surface of the first support rod 12, and a first spring 13 is provided between the limiting plate 41 and the cooling water tank 1 and the support 3. The first spring 13 not only realizes the spacing between the conveying roller 5 and the pressure roller 6, but also provides elastic support for the pressure roller 6.

[0051] The pressure roller 6 has a cavity 21 inside, and a water hole 11 is opened through the pressure roller 6. One end of the pressure roller 6 is connected to a bend 19, which is connected to the cooling pipe 8 through a branch pipe 20.

[0052] In this embodiment, a cavity 21 is provided inside the pressure roller 6. The pressure roller 6 and one end of the cooling pipe 8 are connected by the bend pipe 19 and the branch pipe 20. After the water pump 10 is started, cold water can also be pumped into the branch pipe 20 through the cooling pipe 8, and then enter the cavity 21 through the bend pipe 19. Since the pressure roller 6 has water holes 11, the pressure roller 6 can also spray cooling water onto the mandrel, which further improves the cooling effect of the device on the mandrel.

[0053] A filter assembly is installed on one side of the cooling water tank 1. The filter assembly is used to filter impurities from the cooled water, which is then sprayed onto the surface of the mandrel via a spray assembly. The filter assembly includes a filter box 2 connected to one side of the cooling water tank 1, with the bottom surface of the filter box 2 55-75mm lower than the bottom surface of the cooling water tank 1.

[0054] In this embodiment, a filter box 2 is connected to one side of the cooling water tank 1. The bottom surface of the filter box 2 is set 55-75mm lower than the bottom surface of the cooling water tank 1, preferably 70mm. The height difference between the two can allow the filtered impurities to settle, preventing impurities from clogging the connection between the cooling water tank 1 and the filter box 2.

[0055] The filter assembly also includes a guide plate 18 inclined between the filter box 2 and the support 3. Two sets of lifting lugs 17 are symmetrically arranged at one end of the guide plate 18. The top of the support 3 is provided with a second support rod 23, and the lifting lugs 17 are connected to both ends of the second support rod 23.

[0056] An inclined guide plate 18 is provided below the conveyor roller 5. One end of the guide plate 18 is connected by a lifting lug 17 and a second support rod 23. The other end of the guide plate 18 is lower than the end connected by the lifting lug 17 and is connected to the filter box 2, so as to smoothly guide the cooling water into the filter box 2 as much as possible.

[0057] The filter box 2 has an inlet 30 at one end that matches the guide plate 18 at one end. A floating plate 33 is elastically connected inside the filter box 2. A wing plate 31 is connected to the floating plate 33. A second spring 32 is connected between adjacent wing plates 31. A filter plate 34 is installed inside the filter box 2 at the communication position between the filter box 2 and the cooling water tank 1. The wing plate 31 is slidably connected to one side of the filter plate 34. A guide bar 39 is connected to one side of the wing plate 31. The guide bar 39 and the filter plate 34 are slidably connected.

[0058] In this embodiment, a floating plate 33 is slidably connected to one side of the filter plate 34. A wing plate 31 is elastically connected above the floating plate 33 via a second spring 32. The wing plate 31 is slidably connected to one side of the filter plate 34 via a guide bar 39. After cooling water enters the filter box 2 through the inlet 30, it strikes the wing plate 31, compressing the second spring 32 and pulling the wing plate 31 to scrape on one side of the filter plate 34. The change in the impact force of the water flow causes the second spring 32 to move the wing plate 31 against the filter plate 34 under the reciprocating action of being forced and returning, thereby cleaning the filter plate 34 and preventing the filter plate 34 from being blocked by impurities during the filtration process, effectively avoiding poor filtration caused by blockage.

[0059] It should be noted that protective covers 42 are provided on both sides of the guide plate 18, which can not only support the multiple sets of cooling pipes 8, but also prevent other impurities from falling into the guide plate 18.

[0060] A pad 38 is connected to the bottom of one side of the filter plate 34, and a guide shaft 35 is connected to the pad 38. A guide sleeve 36 is connected to the bottom of the floating plate 33, and the guide shaft 35 is slidably connected to the guide sleeve 36 through a third spring 37.

[0061] It should be noted that a guide sleeve 36, a guide shaft 35, and a third spring 37 are sequentially arranged between the floating plate 33 and the filter plate 34. The floating plate 33 is used to limit the upper floating plate 33, ensuring the scraping area of ​​the floating plate 33 and ensuring the effect of clearing the blockage of the filter plate 34.

[0062] The floating frame 7 is connected to the two sides of the connecting shaft 27, and the guide plate 18 is rotatably connected to the rotating shaft 24. The rotating shaft 24 has flaps 25 arranged in a ring at equal intervals on its surface. Both ends of the rotating shaft 24 are connected to the connecting shaft 27 with traction ropes 26.

[0063] In this embodiment, a rotating shaft 24 is rotatably arranged inside the guide plate 18, and a flap 25 is provided on the surface of the rotating shaft 24. The power generated by the flow of the recovered cooling water inside the guide plate 18 impacts the flap 25, thereby driving the rotating shaft 24 inside the guide plate 18 to rotate. Since a traction rope 26 is connected between the rotating shaft 24 and the connecting shaft 27, the traction rope 26 can be wound up during the rotation of the rotating shaft 24, thereby pulling the floating frame 7 and the pressure roller 6 inside it downward through the connecting shaft 27. It always keeps in close contact with the mandrel on the conveying roller 5 and rotates. This not only does not create resistance to the movement of the mandrel, but also allows the pressure roller 6 and the conveying roller 5 to always squeeze the mandrel, preventing the mandrel from deforming during the cooling process.

[0064] In this invention, the starting motor 16 drives one set of support seats 15 and the guide rollers 14 inside the support seats 15 to rotate, thereby driving the bottom gear 28 to rotate. Through the rotation of the transition wheel 29 meshing with the gear 28, the other set of guide rollers 14 is driven to rotate. The two sets of guide rollers 14 rotate relative to each other, and the auxiliary conveying roller 5 guides and conveys the mandrel.

[0065] According to the specifications of the mandrel, the drive equipment can be started to drive the conveying roller 5 to rotate, and the guide roller 14 can be used to convey the mandrel. At the same time, the water pump 10 is started to pump the cooling water in the cooling water tank 1 into the cooling pipe 8, and spray it onto the surface of the mandrel through the spray nozzle 9. The first support rod 12 is set on both sides of the floating frame 7 and slides above the cooling water tank 1 and the support 3 respectively, so that the pressure roller 6 used to fit the mandrel can change the distance between the conveying roller 5 and the pressure roller 6 according to the specifications of the mandrel, thus expanding the applicable range of the pressure application component.

[0066] After the water pump 10 is started, cold water can also be pumped into the branch pipe 20 through the cooling pipe 8, and then enter the cavity 21 through the bend pipe 19. Since the pressure roller 6 has water holes 11, the pressure roller 6 can also spray cooling water onto the mandrel, which further improves the cooling effect of the equipment on the mandrel.

[0067] After the cooling water enters the filter box 2 through the inlet 30, it hits the wing plate 31, compresses the second spring 32, and pulls the wing plate 31 to scrape on one side of the filter plate 34. The change in the impact force of the water flow will cause the second spring 32 to drive the wing plate 31 to move against the filter plate 34 under the reciprocating action of being forced and returning, thereby cleaning the filter plate 34 and preventing the filter plate 34 from being blocked by impurities during the filtration process, effectively avoiding poor filtration caused by blockage.

[0068] The force generated by the flow of the recovered cooling water within the guide plate 18 impacts the flap 25, thereby driving the rotating shaft 24 within the guide plate 18 to rotate. This causes the traction rope 26 to be wound up, connecting to the connecting shaft 27, which in turn pulls the pressure roller 6 within the floating frame 7 downwards. This roller 6 remains in close contact with the mandrel on the conveying roller 5, ensuring that it does not hinder the movement of the mandrel and that the pressure roller 6 and the conveying roller 5 continuously compress the mandrel, preventing deformation of the mandrel during the cooling process.

[0069] This invention also discloses a cooling method based on a mandrel cooling device for seamless steel pipe production and processing, comprising the following steps:

[0070] Step 1: Place one end of the mandrel between the two sets of guide rollers 14, and start the motor 16 to drive the mandrel to move into the conveying assembly;

[0071] Step 2: During the conveying process, the mandrel is pressed against the pressure roller 6 and the conveying roller 5, and at the same time the water pump 10 is started to spray and cool the mandrel through the spray nozzle 9.

[0072] Step 3: Cooling water is guided by the guide plate 18 into the filter box 2, where it is filtered by the filter plate 34 to remove impurities. Then it flows into the cooling water tank 1, where it is cooled and pumped into the cooling pipe 8 by the water pump 10 to continue cooling the mandrel.

[0073] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mandrel cooling device for seamless steel pipe production and processing, comprising a cooling water tank (1) and a conveying assembly, wherein a spraying assembly is connected to the top of the cooling water tank (1), and the conveying assembly comprises conveying rollers (5) arranged in an equidistant array and conveying frames (4) disposed at both ends of the conveying rollers (5), wherein the cooling water tank (1) is disposed at one end of the conveying frame (4), characterized in that, It also includes a support (3) located at the other end of the conveyor (4); The cooling water tank (1) and the support (3) are provided with a pressure application component. The pressure application component is used to apply pressure to the cooling mandrel. The mandrel is fitted between the pressure application component and the conveying roller (5). The pressure application component includes two sets of floating frames (7) and a pressure roller (6) rotatably connected in the two sets of floating frames (7). The outer walls of the floating frames (7) are symmetrically connected to two first support rods (12). One end of the two sets of first support rods (12) is slidably connected to the top of the cooling water tank (1), and the other two sets of first support rods (12) are slidably connected to the top of the support (3). The top of the cooling water tank (1) and the support (3) are provided with guide holes (22). The first support rod (12) is slidably inserted into the guide hole (22). The outer wall of the first support rod (12) is provided with a limit plate (41). The limit plate (41) is connected to the upper surface of the cooling water tank (1) and the support (3) with a first spring (13). The pressure roller (6) has a cavity (21) and a water hole (11) is provided through the pressure roller (6). One end of the pressure roller (6) is connected to a bend (19), which is connected to a cooling pipe (8) through a branch pipe (20). A filter assembly is provided on one side of the cooling water tank (1). The filter assembly is used to filter impurities in the cooled water and then spray it onto the surface of the core rod via a spray assembly. The filter assembly includes a filter box (2) connected to the side of the cooling water tank (1). One end of the filter box (2) is provided with a water inlet (30) that matches one end of the guide plate (18). The floating frame (7) is connected to the connecting shaft (27) on both sides. The guide plate (18) is rotatably connected to the rotating shaft (24). The rotating shaft (24) has flaps (25) arranged in an annular equidistant array on its surface. The two ends of the rotating shaft (24) are connected to the connecting shaft (27) with traction ropes (26).

2. The mandrel cooling device for seamless steel pipe production and processing according to claim 1, characterized in that, The spray assembly includes a cooling pipe (8), the inner wall of which is connected to a spray nozzle (9), one end of which is connected to a water pump (10), the spray nozzle (9) facing the core rod, the cooling pipe (8) being connected above the cooling water tank (1), and a connecting pipe (40) connecting two adjacent sets of cooling pipes (8).

3. The mandrel cooling device for seamless steel pipe production and processing according to claim 1, characterized in that, The conveyor frame (4) is provided with a material guiding assembly at one end. The material guiding assembly includes a support base (15). Two sets of material guiding rollers (14) are rotatably mounted on the support base (15). One set of material guiding rollers (14) is connected to a motor (16) at the top end. Both sets of material guiding rollers (14) are provided with gears (28) at the bottom end. A transition wheel (29) meshes between the two sets of gears (28).

4. The mandrel cooling device for seamless steel pipe production and processing according to claim 1, characterized in that, The bottom surface of the filter box (2) is 55-75mm lower than the bottom surface of the cooling water tank (1); the filter assembly also includes a guide plate (18) inclined between the filter box (2) and the support (3), and two sets of lifting lugs (17) are symmetrically arranged at one end of the guide plate (18). The top of the support (3) is provided with a second support rod (23), and the lifting lugs (17) are connected to both ends of the second support rod (23).

5. A mandrel cooling device for seamless steel pipe production and processing according to claim 4, characterized in that, A floating plate (33) is elastically connected inside the filter box (2). A wing plate (31) is connected to the floating plate (33). A second spring (32) is connected between adjacent wing plates (31). A filter plate (34) is installed inside the filter box (2) at the communication position between the filter box (2) and the cooling water tank (1). The wing plate (31) is slidably connected to one side of the filter plate (34). A guide strip (39) is connected to one side of the wing plate (31). The guide strip (39) and the filter plate (34) are slidably connected. A pad (38) is connected to the bottom of one side of the filter plate (34), and a guide shaft (35) is connected to the pad (38). A guide sleeve (36) is connected to the bottom of the floating plate (33), and the guide shaft (35) is slidably connected to the guide sleeve (36) by a third spring (37).

6. A cooling method, comprising the mandrel cooling device for seamless steel pipe production and processing as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1: Place one end of the mandrel between the two sets of guide rollers (14), and start the motor (16) to drive the mandrel into the conveying assembly; Step 2: During the conveying process, the mandrel is pressed together by the pressure roller (6) and the conveying roller (5), and at the same time the water pump (10) is started to spray and cool the mandrel through the spray nozzle (9); Step 3: Cooling water is guided by the guide plate (18) into the filter box (2), where it is filtered by the filter plate (34) to remove impurities, and then flows into the cooling water tank (1). After cooling, it is pumped into the cooling pipe (8) by the water pump (10) to continue cooling the core rod.

Images