The existing three-roller six-arm device used for strip guide for aluminum-zinc-silicon coating usually does not have a scraper device that automatically removes the residue on the roll surface. The cast iron method is used, and the overall structure is not stable enough, resulting in a short service life, which seriously affects the quality of the product and cannot meet the quality requirements of the product. In order to solve the above problems, it is necessary to provide a three-roller six-arm device with a scraper and a galvanized zinc-plated scraper with smooth operation and high efficiency. Qingdao Hexin Machinery Co., Ltd. found the following new technical solutions to achieve.
 
Aluminized zinc-plated three-roller six-arm device with scraper, including a front stabilizer roller scraper assembly, a rear stabilizer roller scraper assembly, and a sunken roller scraper assembly, the rear stabilizer roller scraper assembly and the submerged roller scraper assembly are arranged in the On the submerged roller girder, the front stabilizer roller scraper assembly and the submerged roller scraper assembly include a guide rail, a driving device, a traveling device and an air cylinder, the traveling device is arranged on the guide rail, and the traveling device is driven by the driving device, so the The driving device includes a motor and a lead screw, the motor and the lead screw are driven by a chain, the traveling device is driven by a lead screw, and the traveling device includes a front stabilizer roller scraper traveling trolley and a sinking roller scraper traveling trolley. A front stabilizing roller and a front stabilizing roller scraper are arranged under the traveling trolley of the front stabilizing roller scraper, the front stabilizing roller is connected with the arm of the front stabilizing roller, and a rear stabilizing roller and a submerging roller are arranged under the traveling trolley of the sinking roller scraper. The stabilizing roller and the submerged roller are in contact and cooperate with the rear stabilization roller scraper link and the submerged roller scraper link, respectively, and the rear stabilization roller and the submerged roller are respectively provided with a rear stabilization roller scraper and a submerged roller scraper; on the submerged roller beam Symmetrically arranged limit devices, the front stabilizer roller scraper, the rear stabilizer roller scraper and the sinking roller scraper are all driven by the cylinder using the lever principle, and the rear stabilizer roller scraper link is arranged in the middle of the sink roller scraper link; the walking device Set on the side of the submerged roller beam, the submerged roller frame and the front stabilized roller frame are made of low-alloy and high-strength Q345 steel plate after welding, tempering and shot blasting. The heat dissipation holes ensure that the roller frame can reduce the deformation amount in the long-term high temperature environment. The lifting plate of the front stable roller frame and the lifting plate of the sunken roller frame are equipped with three holes, which are suitable for the lifting position under different conditions and have strong adaptability. The steel plates for installing the front stabilizing roller arm, the rear stabilizing roller arm and the hanging plate of the sunken roller arm are all made of high-strength medium-thickness structural steel plates, so that the oppositely installed sunken roller arm and the rear stabilizing roller arm can be fully attached. During the production process, the stability of the arm and the beam is always maintained, and the jump of the arm, the beam and the roller will not occur due to changes in other factors, which will affect the quality of the finished product.
There are double limit protection contacts on the limit devices at the turn-back positions at both ends of the track of the walking trolley, the purpose of which is that the travel of the trolley can meet the technological requirements of cleaning the full length of the roller.
The shape of the blade arm of the sinking roller and the stabilizing roller is an arc curved shape, which can avoid the interference of the structure between the rollers, so that the cutter head can be pressed against the roller surface from the selected position from the side, and each scraper head is made of HD alloy. , The length is 60mm, the width is 40mm, and the thickness is 10mm. Zinc baffles are installed on the front side and bottom of the guide rail to prevent the zinc slag from splashing on the screw rod and guide rail of the trolley, which affects the running accuracy of the trolley.
The sunken roller arm and the stabilizing roller arm are all cut from 316L forgings as a whole, with tight internal molecular structure, good stability, corrosion resistance, small deformation coefficient, long service life (can be used for more than 15 years) and other characteristics, the performance characteristics are far higher It is used for the arm of the cast structure, and the cost of production and use is greatly reduced.
The bearing seat of the submerged roller is also made of 316L forging as a whole. The joint surface adopts the 90-degree centering method, which has high matching accuracy and is easy to assemble and disassemble. The two ends are fastened by stud bolts. reliable.
The inner lining of the submerged roller bearing seat is made of 316L forgings, and is spot welded with the inner hole of the bearing seat, which strengthens the rigidity of the submerged roller bearing bush during operation.
The bearing bush of the submerged roller is made of imported alloy material with diversion grooves, which reduces the chance of zinc slag accumulation, and at the same time reduces the friction between the slag and the sleeve, so that the roller system runs more smoothly and prolongs the service life of the shaft and the sleeve.
The stabilizing roller bearing seat also adopts 316L forgings, and the structure adopts a split structure, which is easy to assemble and disassemble.
The bearing bush of the stabilizing roller adopts a split structure, and the positioning effect is good. The assembly and disassembly is much more convenient than the integrated one, which saves a lot of assembly and disassembly time.
The shaft head block adopts L-shaped structure, which is simple and beautiful in appearance and easy to maintain and operate.
The tie rod of the sunken roller and the tie rod of the stabilizing roller adopt a closed nut and tightening structure to prevent the zinc slag from adhering to the thread, which is easy to assemble and disassemble, and has a beautiful and practical appearance.
Therefore, compared with the prior art, the beneficial effects of the present utility model are: the structural design of the present utility model is reasonably optimized, the optimization of the limiting devices at both ends of the traveling device makes the scraper device more reliable, and various components are optimized accordingly. The optimization of the material results in a longer service life and can meet different requirements, and the surface quality of the galvanized steel strip has been further improved.
In this utility model:
a. The transmission mode of the operating mechanism of the scraper is: motor-driven reducer → chain drive → screw nut drive, so that the scraper trolley moves linearly along the guide rail plate, and the travel switch controls the reciprocation, so that the scraper can move longitudinally on the roller surface, and at the same time The scraper arm is oscillatingly connected to the cylinder installed on the upper part of the trolley, and by adjusting the cylinder pressure, the scraper head can obtain a reliable and stable working state on the roller surface. The screw nut is made of cast aluminum bronze, and the trapezoidal thread large contact surface transmission has good wear resistance and anti-seizure.
b. The motor is installed above the lower temperature roller beam, and the motor transmits the power to the screw rod of the scraper device through the sprocket drive.
c. The shape of the blade arm of the sinking roller and the stabilizing roller is an arc curved shape, which can avoid the interference of the structure between the rollers, so that the cutter head can be pressed against the roller surface from the selected position from the side. The cutter head is made of HD alloy , the length is 60mm, the width is 40mm, and the thickness is 10mm. The two sets of cutter arm cutter heads of the sinking roller and the stabilizing roller are installed in the front and rear of the reciprocating trolley in the way that the pin shaft cantilever is arranged in series. The side presses against the roller surface and cleans the sunken roller and the rear stabilizer roller simultaneously by moving and scanning. Adjusting the air supply pressure of the air cylinder can control the contact pressure between the cutter head and the roller surface respectively. Due to the cantilever structure, the self-weight of the cutter arm only acts on the pin without affecting the contact pressure between the cutter head and the roller surface.
d. The cylinder push-pull knife arm assembly fixed on the trolley rotates with the pin as the center to make the cutter head press against or leave the roller surface. When the cutter head contacts the roller surface, the cylinder continues to maintain the set air pressure so that the cutter head is at the set pressure Pressed against the roller surface, the impurities adhering to the roller surface will be removed by the cutter head because the roller is rotating. The impurities are mainly suspended slag, which will not fall on the roller surface and pollute the roller again under the action of the rotating eddy current on the roller surface. noodle. When the cutter arm is pressed against the roller surface, the cutter head reciprocates along the axis of the roller driven by the trolley to remove the impurities on the roller surface one by one. The phenomenon that the surface does not fit together is reasonable for the cutter head working in the zinc liquid at a temperature as high as 430~630℃. Under different working conditions, by adjusting the working pressure of the cylinders of the two cutter arms, the contact pressure between the cutter head and the roller surface can be adjusted respectively, and the impurities of different properties, such as soft slag of pure zinc and zinc liquid and high aluminum zinc liquid, can be adjusted respectively. Harder slag, using different contact pressures can more effectively remove impurities on the roll surface without scratching the roll surface.
e. When the scraper device is working, the motor drives the lead screw to rotate through the sprocket chain. The lead screw and the lead screw nut installed on the carrying trolley of the knife arm form a driving mechanism to drive the trolley to move forward or backward on the guide rail. When the trolley walks to one end , the limit contact pushes the limit switch to send out an electrical signal, the electrical control box controls the motor to reverse after getting the signal, the trolley returns to the other end, and so on. The cutter arm and its driving part are installed on the running trolley by the sunken roller cylinder, the stabilizer roller cylinder, the connecting rod together with the drag chain and the air pipe. When working, the cylinder piston rod retracts to drive the knife arm assembly to rotate around the shaft pin, so that the blade is pressed against the roller surface. The contact pressure between the blade and the roller surface is determined by the air pressure of the cylinder, and the pressure value can be controlled by the pressure in the air control box. When the valve is set, the trolley reciprocates at the same time when the blade is in contact with the roller surface. When it stops, the electric control box sends a stop command, and the cylinder piston rod extends to drive the knife arm assembly to rotate around the knife arm pin shaft, so that the blade leaves the roller surface, and the trolley stops at the same time. , the device is offline until the next startup.
The utility model not only has a novel scraper running device, but also has reasonable structural stability. The scraper head 40 adopts a self-made HD alloy, the knife arm adopts a series-type short knife head, and the scanning method cleans the surface of the roller, which can simultaneously remove the sinking roller and the stabilizing roller. The adhesion of impurities, different working pressure settings, can be suitable for different actual working conditions, the removal effect is more than 80% higher than other forms of scraper systems, the degree of automation is high, and the cleaning effect is good. The scraper device is more reliable, and various components are optimized with the best material to make the service life longer, which can meet different requirements, and the surface quality of the steel strip has been further improved.
The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.