Li Jinfeng

Precautions for installing the hoist
One-screw hoist
During installation, the base foundation should be firm and flat, leaving space for the foot screws. After the hoist is in place, it should be leveled and poured into shape.
The screw rod of the hoist must be parallel to the grinding track surface of the gate and perpendicular to the lifting lug axis. The two machine bases of the double lifting point type must be on the same plane. The two screw rods are parallel and perpendicular to the lifting lug axis. Axis, hand-cranked or electrified hoist, first hand-crank it up and down several times, and then it can be powered on and used after reaching the specifications. When operating with power, there is a descending depth controller, but the operator is not allowed to leave the site without authorization to prevent failure due to circuit failure. Collisions occur.
2. Winch type hoist
During installation, the base foundation should be firm and flat, leaving space for the foot screws. After the hoist is in place, it should be leveled and poured into shape.
First wind the wire rope around the balance wheel, divide the rope length equally on both sides, wind the wire rope up through the moving pulley group, and fix the two ends at the end of the drum at the same time.
Precautions for installation of three gates
Before installing the gate, first check whether the bolts at each connection part are loose due to transportation and loading and unloading. If they are loose, they should be tightened.
Check whether the stop surface on the connection between the main vertical frame and the horizontal frame is misaligned. If there is misalignment, loosen the connecting bolts and adjust the stop surface to the same plane.
When installing the gate, the gate should be installed in place as a whole. It is prohibited to install the gate frame and gate plate separately to prevent the gate frame from deforming.
Before the second phase of pouring, hoist the gate as a whole into place, find the correct positions of the front, rear, left, and right, and then adjust the bolts and weld them firmly with the engineering steel bars.
Before the gate leaves the factory, in order to make the gate plate and gate frame fit more tightly and reduce the gap after installation, the gate with a height of more than 1 meter is equipped with pressure plate clamps on the upper and lower horizontal frames, and a top is added on the inclined iron of the vertical frame. Silk. Note that after adjusting the gap, remove the top screws on the clamping iron and inclined iron to enable the gate to open and close.
When pouring concrete, the mortar flowing into the gap between the gate gate frame and the inclined iron baffle should be removed to prevent the mortar from solidifying and affecting the opening and closing.
Installation, debugging, use and maintenance of screw hoist and cast iron gate
Installation and debugging of a gate
Before installation, first check the relationship between the gate plate and the gate plate between the mullion and transverse frame. Interval refers to whether the connecting screws of a gate with multiple gate plates have become loose during transportation and loading, and whether their joints have wrong teeth. They should be adjusted to a flat surface. Check the gap between the gate plate and the gate slot to ensure that the gate slot and gate plate are in good condition. The gap is not larger than that. If there is a gap, the closing device can be adjusted. Tighten each connecting bolt. When installing, the entire gate should be vertically inserted into the reserved slot. Adjustment pads should be placed under the vertical frames on both sides. It is strictly prohibited to place crossbeams under them. The two vertical frames should be stabilized with manual hoists and diagonal pulls. The gate should be straightened and leveled. Anchor bolts should be strung into the foot holes at each location. , adjust the position of the gate, support the formwork for the second phase of pouring. When pouring concrete, the mortar that flows into the space between the inclined iron baffles of the gate frame should be completely removed to prevent the mortar from affecting the opening and closing of the gate after solidification. Remove reinforcement. Before the gate leaves the factory, in order to make the gate plate and gate frame fit tightly and reduce the gap after installation, the above gate is equipped with a closing device weight on the upper and lower frames. Note that after the gap is adjusted, the closing weight is removed so that the gate can be opened. close.
Use and maintenance of the second gate
The gate should pay attention to the upper and lower limit positions of the gate plate, and cannot exceed the limit to avoid damage to the gate or hoist. If there is any abnormality during the opening and closing process of the gate, it should be stopped immediately and inspected and repaired in time. When the gate is closed, it should be one centimeter away from the bottom of the gate. It should be paused for a minute to allow the torrent to wash away the debris in the bottom gate groove, and then the gate should be closed again. Clean the dirt on the gate plate and gate frame in an emergency before the gate is closed for a long time. After cleaning, re-apply new oil to prevent corrosion from affecting future opening and closing.
The three-screw hoist must keep the foundation layout plane horizontal. The contact area between the hoist base and the foundation layout plane must reach the above level. The screw axis must be vertical to the gate platform. The horizontal plane measured on the gate platform must be vertical to the gate lifting lugs. , to prevent the screw from tilting, causing local stress and damaging the machine parts. Place the hoist in the installation position. Put a limit plate on the screw, screw the screw into the hoist from the lower part of the beam, and then put the limit plate on the screw after it is exposed from the top of the hoist. The bottom of the screw rod is connected with the gate. The basic building installation of the hoist must be stable and safe. The concrete for the machine base and basic components must be poured according to the provisions of the drawings. When the strength of the concrete does not reach the design strength, the temporary support of the hoist is not allowed to be removed or changed, let alone trial adjustment and trial operation. Install the hoist according to the lifting centerline of the gate, and find the center so that the vertical and horizontal centerline deviation does not exceed plus or minus, and the elevation deviation does not exceed plus or minus. Then the second stage concrete is poured or connected with the embedded steel plate. The installation of electrical equipment for starting and shutting down the machine shall comply with the requirements of the drawings and instructions, and all electrical equipment shall be reliably grounded. After each hoist is installed, the hoist should be cleaned, the damaged protective paint repaired, and grease filled.
Four hoist debugging
Under no load conditions, ensure that the three-phase current imbalance does not exceed positive and negative, and measure the current value. Adjustment of the upper and lower limits When the gate is in a fully closed state, press the upper limit switch against the upper limit switch and fix it on the screw. When the gate is fully open, press the lower limit plate against the lower travel switch and fix it on the screw. The adjustment of the hoist's master controller must ensure that the error does not exceed the upper and lower limits when the gate is raised and lowered. After installation, a trial run must be carried out. A no-load test is performed, that is, let the screw make two strokes, listen for any abnormal sounds, and check whether the installation meets the technical requirements. Second, perform a load test. Under the rated load, perform two strokes to observe the operation of the screw and the gate to see if there are any abnormalities. Only after confirmation can it be officially launched.
The operator must master the structural performance and operating methods of the hoist, and have certain mechanical knowledge to ensure the normal operation of the machine. Before operation, conduct a comprehensive inspection of the lifting and shutting down machine to see if all parts are well lubricated and whether the bolts are loose. When electric opening and closing, check whether the power line is connected and whether the switch is in good condition. During electric operation, operators are not allowed to leave the site and stop the machine immediately if any problems are found. When starting and shutting down the machine for maintenance, the load must be removed. During use, lubricating oil needs to be injected from the oil injection hole at any time, and sufficient lubricating oil must be maintained at all times. The screw must be regularly cleaned of grease and coated with new oil to prevent corrosion.