Steel pipe quenching and tempering treatment production line

Abstract

The utility model discloses a steel pipe quenching and tempering treatment production line, which relates to the technical field of steel pipe quenching and tempering treatment, and comprises an electromagnetic induction heating device and a cooling device, the electromagnetic induction heating device comprises a roller way and a plurality of heating units, the roller way comprises a plurality of conveying roller units arranged side by side, and a mounting gap is formed between every two adjacent conveying roller units. The heating units are respectively arranged at the corresponding mounting gaps; the heating unit comprises a jacking mechanism and at least two electromagnetic coils with different specifications, the electromagnetic coils are arranged on the jacking mechanism from bottom to top, and central shafts of coil holes of the electromagnetic coils are parallel to the conveying direction of the conveying roller unit; the conveying roller units are matched with one another for conveying steel pipes; the jacking mechanism is used for driving all the electromagnetic coils to move up and down so that the conveyed steel pipes can penetrate through the corresponding electromagnetic coils to be heated, and the cooling equipment is used for cooling the steel pipes. The quenching and tempering device can meet the quenching and tempering requirements of steel pipes in different specification ranges, and the application range is greatly expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe quenching and tempering treatment, in particular to a steel pipe quenching and tempering treatment production line. Background Art

[0002] At present, electromagnetic induction heating equipment is commonly used in steel pipe tempering production lines to heat steel pipes so that the temperature of the steel pipes can meet the process requirements of the tempering treatment. When heating the steel pipe, the steel pipe needs to pass through the coil hole of the electromagnetic coil of the electromagnetic induction heating equipment, and the electromagnetic induction heating equipment is controlled by the control unit to connect to a high-power power supply, and the high-power electromagnetic waves generated by the electromagnetic coil are used to generate electromagnetic excitation on the steel pipe in the coil hole, so that the steel pipe itself generates heat, thereby achieving the purpose of heating the steel pipe.

[0003] However, the electromagnetic induction heating equipment on the existing steel pipe tempering production line is only equipped with an electromagnetic coil of one specification, which can only heat steel pipes within the corresponding specification range and cannot heat steel pipes outside this specification range, which greatly limits the scope of use of the steel pipe tempering production line. Utility Model Content

[0004] In view of the above defects existing in the prior art, the utility model aims to provide a steel pipe quenching and tempering production line, which can meet the quenching and tempering treatment requirements of steel pipes within different specifications and greatly expand the scope of use.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A steel pipe tempering production line includes an electromagnetic induction heating device and a cooling device. The electromagnetic induction heating device includes a roller table and a plurality of heating units. The roller table includes a plurality of conveying roller units arranged side by side. An installation gap is formed between each two adjacent conveying roller units. Each heating unit is respectively arranged at a corresponding installation gap. The heating unit includes a lifting mechanism and at least two electromagnetic coils of different specifications arranged on the lifting mechanism from bottom to top. The central axis of the coil hole of the electromagnetic coil is parallel to the conveying direction of the conveying roller unit. Each conveying roller unit cooperates with each other to convey the steel pipe. The lifting mechanism is used to drive all the electromagnetic coils to move up and down so that the conveyed steel pipe passes through the corresponding electromagnetic coil for heating. The cooling device is used to cool the heated steel pipe.

[0007] Among them, there are two electromagnetic coils, which are a large-sized electromagnetic coil and a small-sized electromagnetic coil respectively; a support frame is provided on the lifting mechanism, and the large-sized electromagnetic coil and the small-sized electromagnetic coil are both arranged on the support frame, and the large-sized electromagnetic coil is located below the small-sized electromagnetic coil.

[0008] Wherein, the conveying roller unit includes a roller bracket and a conveying roller rotatably arranged on the roller bracket.

[0009] Wherein, the electromagnetic induction heating device further comprises a driving mechanism for driving all the conveying rollers to rotate.

[0010] Wherein, the electromagnetic induction heating device further comprises a workbench, the lifting mechanism and the conveying roller unit are both arranged on the workbench, and a movable guiding structure is further arranged between the lifting mechanism and the workbench.

[0011] Wherein, the workbench is also provided with a temperature measuring instrument for detecting the temperature of the steel pipe.

[0012] Among them, there are two electromagnetic induction heating devices, which are the first electromagnetic induction heating device and the second electromagnetic induction heating device respectively, and the cooling device is located between the first electromagnetic induction heating device and the second electromagnetic induction heating device. The first electromagnetic induction heating device is used to perform initial heating on the steel pipe, and the cooling device is used to cool the steel pipe that has been initially heated, and the second electromagnetic induction heating device is used to perform secondary heating on the cooled steel pipe.

[0013] The steel pipe tempering treatment production line further comprises a steel pipe loading rack located upstream of the first electromagnetic induction heating device, and the steel pipe loading rack is used to load materials to the first electromagnetic induction heating device.

[0014] The steel pipe tempering treatment production line further comprises a heat preservation device located downstream of the second electromagnetic induction heating device, and the heat preservation device is used to keep the steel pipe heated for the second time.

[0015] The steel pipe tempering treatment production line further comprises a straightening machine located downstream of the insulation equipment, and the straightening machine is used to straighten the steel pipe after insulation.

[0016] By adopting the above technical solution, the beneficial effects of the utility model are:

[0017] The steel pipe tempering treatment production line provided by the utility model has a heating unit of an electromagnetic induction heating device including a lifting mechanism and at least two electromagnetic coils of different specifications arranged on the lifting mechanism from bottom to top. Therefore, when the steel pipe is tempered, the electromagnetic coil matching the steel pipe can be determined according to the specifications of the steel pipe, and then the electromagnetic coil is driven up or down by the lifting mechanism to make the electromagnetic coil correspond to the roller, and then the steel pipe is heated by the electromagnetic coil, and then the heated steel pipe is cooled by the cooling device to achieve the purpose of tempering the steel pipe. Compared with the prior art, the steel pipe tempering treatment production line of the utility model has a simple structure and is easy to operate, and can meet the tempering treatment needs of steel pipes within different specifications, greatly expanding the scope of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial structural schematic diagram of the electromagnetic induction heating equipment in the steel pipe quenching and tempering production line of the utility model;

[0019] In the figure: 1. Heating unit; 11. Lifting mechanism; 12. Large electromagnetic coil; 13. Small electromagnetic coil; 14. Support frame; 15. Support plate; 16. Guide column; 2. Conveyor roller unit; 21. Roller bracket; 22. Conveyor roller; 3. Steel pipe; 4. Workbench; 41. Guide hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] like Figure 1 As shown, this embodiment discloses a steel pipe tempering production line, including an electromagnetic induction heating device and a cooling device (not shown in the figure), the electromagnetic induction heating device includes a roller and a plurality of heating units 1, the roller includes a plurality of conveying roller units 2 arranged side by side, and an installation gap is formed between each adjacent two conveying roller units 2, and each heating unit 1 is respectively arranged at a corresponding installation gap; the heating unit 1 includes a lifting mechanism 11, and at least two electromagnetic coils of different specifications arranged on the lifting mechanism 11 from bottom to top, and the central axis of the coil hole of the electromagnetic coil is parallel to the conveying direction of the conveying roller unit 2; each conveying roller unit 2 cooperates with each other to convey the steel pipe 3, the lifting mechanism 11 is used to drive all electromagnetic coils to move up and down so that the conveyed steel pipe 3 passes through the corresponding electromagnetic coil for heating, and the cooling device is used to cool the heated steel pipe 3.

[0022] In the steel pipe tempering treatment production line in this embodiment, since the heating unit 1 of its electromagnetic induction heating equipment includes a lifting mechanism 11 and at least two electromagnetic coils of different specifications arranged on the lifting mechanism 11 from bottom to top, when the steel pipe 3 is tempered, the electromagnetic coil matching it can be determined according to the specifications of the steel pipe 3, and then the lifting mechanism 11 drives the electromagnetic coil to rise or fall so that the electromagnetic coil corresponds to the roller, and then the steel pipe 3 is heated by the electromagnetic coil, and then the heated steel pipe 3 is cooled by the cooling equipment to achieve the purpose of tempering the steel pipe. Compared with the prior art, the steel pipe tempering treatment production line has a simple structure and is easy to operate, and can meet the tempering treatment needs of steel pipes 3 within different specifications, greatly expanding the scope of use.

[0023] It should be noted that the specification of the electromagnetic coil in this embodiment is based on the aperture of the coil hole of the electromagnetic coil, that is, the diameter specification of the coil hole; correspondingly, the specification of the steel pipe 3 is also based on the diameter of the steel pipe 3, that is, the diameter specification of the steel pipe 3.

[0024] In this embodiment, the electromagnetic induction heating equipment is provided with two electromagnetic coils, which are a large-sized electromagnetic coil 12 and a small-sized electromagnetic coil 13 respectively; a support frame 14 is provided on the lifting mechanism 11, and the large-sized electromagnetic coil 12 and the small-sized electromagnetic coil 13 are both arranged on the support frame 14, and the large-sized electromagnetic coil 12 is located below the small-sized electromagnetic coil 13. Of course, the large-sized electromagnetic coil 12 can also be arranged above the small-sized electromagnetic coil 13, and this embodiment does not limit this.

[0025] The large-sized electromagnetic coil 12 and the small-sized electromagnetic coil 13 are driven up and down by the lifting mechanism 11, which not only realizes the selection of the large-sized electromagnetic coil 12 or the small-sized electromagnetic coil 13, meets the use requirements of the steel pipe 3 within different specifications and expands the scope of use, but also makes full use of the upper space of the workplace, reduces the floor space and improves the space utilization rate of the workplace.

[0026] In this embodiment, the lifting mechanism 11 of the electromagnetic induction heating device is a cylinder or a hydraulic cylinder, a supporting plate 15 is arranged on the piston rod of the cylinder or the hydraulic cylinder, and the support frame 14 is arranged on the supporting plate 15. By arranging the supporting plate 15, the stability of the connection is improved.

[0027] The conveying roller unit 2 of the electromagnetic induction heating device in this embodiment includes a roller bracket 21 and a conveying roller 22 rotatably disposed on the roller bracket 21 .

[0028] Since the V-shaped roller can concentrate the steel pipe 3 in the middle thereof and prevent the steel pipe 3 from rolling down during transportation, thereby improving the stability of the steel pipe 3 during tempering treatment, the conveying roller 22 in this embodiment is preferably a V-shaped roller, and mounting shafts are respectively provided at both ends of the V-shaped roller, and the two mounting shafts are respectively rotatably mounted on the roller bracket 21.

[0029] The electromagnetic induction heating device in this embodiment also includes a driving mechanism (not shown in the figure) for driving all the conveying rollers 22 to rotate. The driving mechanism can adopt a chain drive structure or a belt drive mechanism. Since the chain drive mechanism has no sliding and high transmission efficiency, it can be used in harsh environments. Therefore, the driving mechanism in this embodiment is preferably a chain drive mechanism.

[0030] Specifically, the driving mechanism includes a motor, a driving sprocket disposed on the motor, a driven sprocket disposed on each conveying roller 22, and a chain wound around the driving sprocket and all the driven sprockets.

[0031] The electromagnetic induction heating device in this embodiment also includes a workbench 4, and the lifting mechanism 11 and the roller bracket 21 of the conveying roller unit 2 are both arranged on the workbench 4. In order to ensure the linearity of the up and down movement of the electromagnetic coil, a movable guide structure is also arranged between the lifting mechanism 11 and the workbench 4 in this embodiment.

[0032] Specifically, the movable guide structure includes a guide column 16 disposed on the supporting plate 15 and a guide hole 41 disposed on the workbench 4 , and the guide column 16 is slidably disposed in the guide hole 41 .

[0033] The workbench 4 of this embodiment is also provided with a temperature measuring instrument (not shown in the figure) for detecting the temperature of the steel pipe 3 .

[0034] Specifically, there are two groups of thermometers, which are upstream thermometers and downstream thermometers. The upstream thermometer is installed on the upstream side of the roller, and is used to measure the temperature of the steel pipe 3 that is about to enter the electromagnetic induction heating device to obtain the temperature of the steel pipe 3 before heating; the downstream thermometer is installed on the downstream side of the roller, and is used to measure the temperature of the steel pipe 3 that has been heated to obtain the temperature of the steel pipe 3 after heating.

[0035] The upstream temperature measuring instrument and the downstream temperature measuring instrument are both electrically connected to the control unit of the steel pipe tempering treatment production line. The control unit can obtain the pre-heating temperature and the post-heating temperature of the steel pipe 3 through the upstream temperature measuring instrument and the downstream temperature measuring instrument, respectively.

[0036] It should be noted that the upstream side and downstream side of the roller table here refer to the production line. Specifically, the upstream side refers to the side where the steel pipe 3 is input, and the downstream side refers to the side where the steel pipe 3 is output.

[0037] In this embodiment, two electromagnetic induction heating devices are provided, and the two electromagnetic induction heating devices are respectively the first electromagnetic induction heating device and the second electromagnetic induction heating device. The cooling device is located between the first electromagnetic induction heating device and the second electromagnetic induction heating device. The first electromagnetic induction heating device is used to perform primary heating on the steel pipe 3, the cooling device is used to cool the steel pipe 3 that has been initially heated, and the second electromagnetic induction heating device is used to perform secondary heating on the cooled steel pipe 3. In practical applications, the number of electromagnetic induction heating devices can be set according to actual needs, and this embodiment does not limit this.

[0038] Since water cooling is an efficient and energy-saving cooling method, the cooling device in this embodiment is preferably a spray water tank.

[0039] The steel pipe tempering production line in this embodiment also includes a steel pipe loading rack located upstream of the first electromagnetic induction heating device, and the steel pipe loading rack is used to feed the first electromagnetic induction heating device. By setting the steel pipe loading rack, automatic loading of the steel pipe 3 is achieved, thereby improving work efficiency.

[0040] The steel pipe tempering treatment production line in this embodiment further includes a heat preservation device located downstream of the second electromagnetic induction heating device, and the heat preservation device is used to keep the steel pipe 3 heated after the second heating.

[0041] In this embodiment, the steel pipe tempering production line further includes a straightening machine located downstream of the heat preservation equipment, and the straightening machine is used to straighten the steel pipe 3 after heat preservation.

[0042] When the steel pipe 3 is subjected to quenching and tempering treatment, the electromagnetic coil matching the steel pipe 3 can be determined according to the specifications of the steel pipe 3, and then the electromagnetic coil is driven up or down by the lifting mechanism 11 to correspond to the roller.

[0043] Then, the steel pipe 3 is fed to the first electromagnetic induction heating equipment by the steel pipe feeding rack. During feeding, the steel pipe 3 is uniformly transported to the coil holes of each electromagnetic coil of the first electromagnetic induction heating equipment corresponding to the roller, and the steel pipe 3 is initially heated by the electromagnetic coil. After the initial heating, the steel pipe 3 enters the spray water tank for cooling. The cooled steel pipe 3 is then heated for the second time by the second electromagnetic induction heating equipment. The steel pipe 3 after the secondary heating passes through the insulation equipment and flows to the cooling bed for natural cooling. After a period of natural cooling, the naturally cooled steel pipe 3 is straightened by the straightening machine, and the straightened steel pipe 3 directly falls into the material frame. At this point, the tempering treatment of the steel pipe 3 is completed.

[0044] During the heating process of the steel pipe 3, the control unit will control the heating temperature of the steel pipe 3 by the electromagnetic coil in real time according to the temperature signal fed back by the upstream temperature meter, so that the steel pipe 3 reaches the target heating temperature; the control unit will adjust the heating power of the electromagnetic coil in real time according to the temperature signal fed back by the downstream temperature meter, thereby improving the consistency of the subsequent heating temperature of the steel pipe 3 and reducing the deviation from the target heating temperature.

[0045] The above is a preferred embodiment of the steel pipe quenching and tempering production line of the utility model, and there are more embodiments that will not be described in detail here. The utility model is not limited to the above embodiments, and various changes made by ordinary technicians in this field based on the above concept without creative labor are all within the protection scope of the utility model.

Claims

1. A steel pipe quenching and tempering production line, characterized in that: Including electromagnetic induction heating equipment and cooling equipment, The electromagnetic induction heating device comprises a roller conveyor and a plurality of heating units, wherein the roller conveyor comprises a plurality of conveying roller units arranged side by side, and an installation gap is formed between each two adjacent conveying roller units, and each of the heating units is respectively arranged at the corresponding installation gap; The heating unit comprises a lifting mechanism, and at least two electromagnetic coils of different specifications arranged on the lifting mechanism from bottom to top, wherein the central axis of the coil hole of the electromagnetic coil is parallel to the conveying direction of the conveying roller unit; The conveying roller units cooperate with each other to convey the steel pipe; the lifting mechanism is used to drive all the electromagnetic coils to move up and down so that the conveyed steel pipe passes through the corresponding electromagnetic coils for heating, and the cooling device is used to cool the heated steel pipe.

2. The steel pipe quenching and tempering production line according to claim 1, characterized in that: There are two electromagnetic coils, which are a large-sized electromagnetic coil and a small-sized electromagnetic coil respectively; a support frame is provided on the lifting mechanism, and the large-sized electromagnetic coil and the small-sized electromagnetic coil are both arranged on the support frame, and the large-sized electromagnetic coil is located below the small-sized electromagnetic coil.

3. The steel pipe quenching and tempering production line according to claim 1, characterized in that: The conveying roller unit includes a roller bracket and a conveying roller rotatably disposed on the roller bracket.

4. The steel pipe quenching and tempering production line according to claim 3, characterized in that: The electromagnetic induction heating device further comprises a driving mechanism for driving all the conveying rollers to rotate.

5. The steel pipe quenching and tempering production line according to claim 1, characterized in that: The electromagnetic induction heating device further comprises a workbench, the lifting mechanism and the conveying roller unit are both arranged on the workbench, and a movable guiding structure is further arranged between the lifting mechanism and the workbench.

6. The steel pipe quenching and tempering production line according to claim 5, characterized in that: The workbench is also provided with a temperature measuring instrument for detecting the temperature of the steel pipe.

7. The steel pipe quenching and tempering production line according to claim 1, characterized in that: There are two electromagnetic induction heating devices, which are respectively a first electromagnetic induction heating device and a second electromagnetic induction heating device. The cooling device is located between the first electromagnetic induction heating device and the second electromagnetic induction heating device. The first electromagnetic induction heating device is used for performing initial heating on the steel pipe, the cooling device is used for cooling the initially heated steel pipe, and the second electromagnetic induction heating device is used for performing secondary heating on the cooled steel pipe.

8. The steel pipe quenching and tempering production line according to claim 7, characterized in that: The steel pipe tempering treatment production line further comprises a steel pipe loading rack located upstream of the first electromagnetic induction heating device, and the steel pipe loading rack is used to load materials to the first electromagnetic induction heating device.

9. The steel pipe quenching and tempering production line according to claim 7, characterized in that: The steel pipe tempering treatment production line further includes a heat preservation device located downstream of the second electromagnetic induction heating device, and the heat preservation device is used to keep the steel pipe heated for the second time.

10. The steel pipe quenching and tempering production line according to claim 9, characterized in that: The steel pipe tempering treatment production line also includes a straightening machine located downstream of the insulation equipment, and the straightening machine is used to straighten the steel pipe after insulation.

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