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1,Loading rack
The loading gantry is a stack of steel pipes to be heated. The gantry is welded with a thick 16mm steel plate and 20 hot-rolled I-beams. The width of the table is 200mm, and the table top has a slope of 2.4°. 8 φ325 steel pipes can be placed, and the gantry and column can be placed. Bolted. During work, the crane can hang the whole bundle on the gantry, the bundle device feeds, and the bundle device is driven by the cylinder. After the bundle is bundled, the heated steel pipe will be automatically rolled one by one to the gantry to separate At the material, the separating mechanism sends a piece of material to the end of the loading gantry as needed under the control of the beat. The end is provided with a material positioning seat, which blocks the material and is positioned in the V-shaped groove.
2. Feed translation mechanism
The feed translation mechanism is hydraulically driven. There are 6 sets of feeding mechanism and 6 sets of metallurgical cylinders with cylinder diameter φ50 and stroke of 300mm. In order to ensure synchronization, six sets of hydraulic cylinders are equipped with hydraulic motors. The translation cylinder has 2 sets of cylinder diameter φ80 and a stroke of 750mm. The translation is in place, which is exactly the center of the double roller. Each set of double roller supporting mechanism has 4 wheel sets, and the wheel group supports two 11# light rails, which are accurate, labor-saving, practical and reliable.
3. Double roller drive system
The double-claw transmission device can adjust the angle of the double-barrel to achieve the speed of the steel tube rotation and ensure the speed of advancement. The double-bar linkage transmission adopts a reducer and a frequency converter to ensure the forward speed requirements of steel pipes of different diameters. There are 38 sets of double rollers, 12 sets of feeding ends, 14 sets of middle sections, and 12 sets of discharge ends. The distance between the rollers is 1200mm, the center distance between the two wheels is 460mm, the diameter of the roller is 450mm, and the steel pipes of φ133～φ325 are taken into consideration. One set of rollers is the power wheel, and the other set of rollers is used as the support passive wheel. Considering that the heating furnace has a certain installation. In position, the power wheels are designed with a set of 1:1 sprocket chain drives designed to move the center of the drive connection outward by 350 mm. All the heating zone and the discharge zone of the feeding rod are provided with water cooling device, and the support of the roller is supported by bearings. In order to ensure the uniform and balanced transmission speed of the workpiece before and after, the power uses 38 frequency conversion motors. The speed of the motor is controlled by the inverter. The speed range of the rod is 10~35 rpm, the forward speed is 650~2500mm/min, and the speed range of the inverter is 15~60Hz. The rod is placed at an angle of 5° to the center, the angle can be adjusted to a maximum of 11°, and the minimum can be adjusted to 2°. The adjustment of the angle of the rod is controlled by the motor to drive the turbine vortex in three areas.
The whole double roller linkage is installed on the inclined table of 0.5% from the feeding end to the discharging end, so that the residual water inside the steel pipe can be smoothly discharged after quenching.
By controlling the speed of the feeding rod, the heating rod and the discharging rod, the head and tail of the steel pipe are connected, and the heating furnace is fed in and out until all the tubes of one steel tube leave all the heating furnace body, and The steel pipe that is connected to the head and tail before the upper bed is automatically separated.
4. Heating furnace cooling system
The furnace body was cooled by a FL-1500BP type feng shui cooler from Wuxi Ark. The FL-500 feng shui cooler cools the newly added 1500Kw (two 750Kw) power supplies (the cooling water pipe is stainless steel):
FL-1500BP type feng shui cooler (cooling furnace body) parameters:
Cooling capacity: 451500kcal/h; Working pressure: 0.35Mpa
Working flow: 50m3/h; Inlet and outlet pipe diameter: DN125
Fan rated power: 4.4Kw; pump rated power: 15Kw
FL-500 type feng shui cooler (cooling power supply) parameters:
Cooling capacity: 151500kcal / h; Working pressure: 0.25Mpa
Working flow: 20m3/h; inlet and outlet pipe diameter: DN80
Fan rated power: 1.5Kw; pump rated power: 4.0Kw
5. Quenching liquid cooling system
The furnace body is cooled by the FL-3000BPT type feng shui cooler of Wuxi Ark:
FL-3000BPT type Fengshui cooler (cooling furnace body) parameters:
Cooling capacity: 903000kcal/h; Working pressure: 0.5Mpa
Working flow: 200m3/h; inlet and outlet pipe diameter: DN150
Fan rated power: 9.0Kw; pump rated power: 30Kw × 2
6. Discharge lifting and lowering mechanism
The discharge lifting and lowering mechanism adopts a lever type to keep the hydraulic cylinder away from the hot zone. In order to ensure the flatness of the heating steel pipe, the discharge lifting and lowering device has a total of 11 groups of feeding mechanisms, and is combined into one. The 11-group feeding mechanism can simultaneously lift and lower the material to ensure the synchronization of the heating of the steel pipe. The lifting adopts 2 sets of metallurgical cylinders φ160×360, and the translation cylinder adopts 2 sets of φ80×1200. The travel control is equipped with a proximity switch and can be adjusted. The hydraulic cylinder is equipped with a heat shield.
7. Two-way cooling bed
The cooling bed adopts two sets of sprocket chain conveying mechanisms, one set is a drag pulling device and the other set is a drag rotating device.
The chain drags the rotating device, the overall plane height of the chain is slightly higher than the height of the chain of the drag pulling device, and the chain drag rotating device moves in a uniform manner with the steel tube rotating. Thereby preventing the deformation of the steel pipe at a certain point without rotation. The motor power is 15Kw, and the temperature after the lower cooling bed is ≤150°C.
The dragging device chain adopts a self-made chain, and each conveyor chain has 20 sets of scraping locating frames. The movement mode is a step-type dragging method, and the ratchet mechanism is adopted. The chain and chain center distance is 1200mm, and there are 11 in total. Root, drag zipper device does not carry the weight of the steel pipe.
When the rotating device is dragged and contacted with the heated steel pipe for a long time, the transmission chain will generate heat, which will cause bad factors to the chain for a long time. To eliminate this hidden danger, a pool is built in the center of the drag rotating device, so that the rotating device chain is dragged. Cool while moving.
8. Collecting material rack
The gantry is welded by profile steel. The table top is welded with 16mm thick steel plate and 20 hot-rolled I-beam. The width of the table is 200mm. The table top has a slope of 2.4°. Seven φ325 steel pipes can be placed. The gantry and the column are bolted. The spacing between the gantry is 1200mm, and the end of the gantry is provided with a steel tube limit arm.
An infrared thermometer is arranged at the end of the collecting gantry to measure the temperature after the cooling bed under the steel pipe, and the maximum value of the measured data is sent to the upper computer.
9. Heating furnace adjustment bracket
Electric adjustment, the guide sleeve lifts. Two sets of screw jacks are driven by the gear reducer for height adjustment, and the lifting is stable and reliable.
10. Stop mechanism
When the steel pipe is quenched, normalized, tempered, and quickly reaches the end, it is blocked by the blocking mechanism here. When the proximity switch receives the signal, the discharge lifting and lowering mechanism works, and the chain drag rotating device stops working. . When the lifting and lowering mechanism sends the material to the cold bed and smoothly puts it down, the chain drags the rotating device motor and restarts the work.
11. Hydraulic station
The working pressure is 16Mpa and the volume is 500ml.
Main configuration: double electric double pump, electric control valve, pressure regulating valve, oil level display, oil temperature gauge, oil pressure gauge, oil-water radiator. The hydraulic pipes are made of stainless steel pipes, and the hydraulic oil tanks are welded by stainless steel plates.
11. Quenching liquid spray system
The two-pole gas mist spray system, the two-pole water spray system and the 壹-stage pneumatic spray drying system are used to form an integral spray system. All adjustments are done automatically by the industrial computer and the electric proportional control valve.
12. Quenching liquid collection system
This is done by using an online collection tank with a corresponding quenching fluid collection tank. A filter collection net that facilitates the cleaning of impurities is installed in the collection tank.
13. Anti-chuck system system
A speed measuring device is added between the two rollers at the feeding end to detect whether the tube is stuck (the tube does not move), and the alarm signal is issued once the tube is issued. This device is the same signal as the feed detection switch signal.
Voltage stabilization system
The method of detecting the grid voltage is used to ensure the stability of the heating temperature by automatically adjusting the output power of the intermediate frequency power supply when the grid voltage changes. In addition, when the intermediate frequency power supply changes ±10% of the grid voltage, the intermediate frequency voltage changes only It is 1%.
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