What are the safety requirements for the installation of construction elevators?

What are the safety requirements for the installation of construction elevators?

A. The installation site should be clean and enclosed with signs, and non-working personnel are prohibited from entering; B. Prevent the objects above the installation site from falling, and attach a safety net when necessary;

C. During installation, there must be a special person in charge and unified command;

D. When the elevator is running, the head and hands of personnel shall not be exposed outside the safety fence;

E. If someone is working on the guide rail frame or the wall frame, it is absolutely forbidden to start the elevator, and it is forbidden to enter the outer cage when the hanging cage rises;

F. All components on the hanging cage should be placed stably and should not be exposed outside the safety fence;

G. When the crane arm is used for installation, it shall not be overloaded. The crane arm can only be used for installing or disassembling elevator parts, and shall not be used for other lifting purposes;

H. When there is a hanging object on the derrick, the hanging cage shall not be started;

A, according to the safety requirements of aerial work, installation workers must wear safety helmet, non-slip, seat belt, etc. Don't wear loose clothes, wear work clothes to avoid getting involved in moving parts and causing safety accidents;

J. To operate the elevator, the control box must be taken to the top of the hanging cage, and it is not allowed to operate in the hanging cage;

K. Before the suspension cage is started, a comprehensive inspection shall be conducted to eliminate all unsafe hidden dangers;

When the length is installed and operated, it must be loaded according to the rated installation load of the elevator, and it shall not be overloaded;

Meters (abbreviation of meter)) cannot be installed in thunderstorm, snowy day or bad weather with wind speed exceeding 13m/s;

Noun (abbreviation of Noun) Before the elevator runs, the protective grounding device should be connected with the metal structure of the elevator, and the resistance value should not be greater than 4 ohms;

Note: Don't forget to tighten the bolts of standard section and wall frame.

Elevator installation

The single and double cage elevators assembled by outer cage and hanging cage have been debugged in the factory and can be installed conveniently. For used elevators, first of all, we should conduct a comprehensive inspection according to the requirements in "periodic inspection". If the speed limiter or gear, rack, roller and other parts are about to wear to the limit size, it is best to replace them in advance;

A. installation of single cage elevator:

* clean the basic surface;

* use lifting equipment to hang the lifting point on the hanging cage;

* Lift the lift into position;

* Install the anchor bolts;

* Drive the elevator to put the hanging cage in place, install the anchor bolt, and then install a standard section;

* Loosen the brake on the motor. The method is as follows: firstly, remove the two cotter pins, and make a mark at the opening of the nut before removal, so as to facilitate the reset. Then, tighten the two nuts to ensure that the two nuts rotate downwards in parallel until the brake is released and the brake disc can be rotated at will;

* Use lifting equipment to lift the transmission trolley;

* from the standard section above the car in place;

* After the transmission trolley is aligned with the connecting lug plate of the hanging cage, insert the pin shaft and fix it;

* reset the brake;

* Measure the verticality of the guide rail frame with a level or line drop to ensure that the verticality of each riser in the adjacent direction of the guide rail frame is11500; * Insert adjusting steel plates with different thicknesses between the chassis and foundation at the anchor bolts to adjust the verticality of the guide rail frame;

* When the guide rail frame is adjusted to be vertical, press down the four anchor bolts with a torque of 350N*M;

* Adjust the verticality of the outer cage door frame in the same way, so that the verticality of the outer cage door frame is not greater than11000 in two similar directions; * Install protective railings at the top of the hanging cage;

* adjust the door lock;

B. installation of double cage elevator:

* Install the left half of the elevator by the above method of installing a single car;

* Connect the right half of the outer cage with bolts;

* Adjust the verticality of the outer cage door frame and press the anchor bolt;

* Loosen the brake on the motor in the hanging cage (the method is the same as before);

* Use lifting equipment to lift the outer cage;

* from the hanging cage above the standard section in place;

* restore braking;

Note: Screw the bolt on the brake back to its original position and install the cotter pin.

C. adjustment after installation:

* Check whether all skids or bolts used for transportation are completely removed;

* The meshing clearance between gear and rack should be 0.2-0.3mm; ;

* The clearance between the guide wheel and the back of the frame should be 0.5mm; ;

* The clearance between each roller and the standard section riser is 0.5mm; ;

* All door switches should be flexible;

* Install the buffer spring;

D. derrick installation:

Note: Grease should be added before installation.

* Install the boom into the installation hole at the top of the hanging cage, and it can be used; E. Installation of guide rail frame:

* Wipe clean the pipe joints and rack pins at both ends of the standard section, and add a small amount of grease;

* Open the fence, put down the hook on the boom and hook the standard section spreader;

* Hook a standard section with a standard section spreader, with one end of the taper sleeve facing down;

* Shake chain block, lift the standard section to the top of the hanging cage and hold it steady;

* Close the fence and start the elevator. When the hanging cage rises to near the top of the guide rail frame, it should move slowly until the top of the hanging cage is about 300MM away from the top of the guide rail frame.

* Lift the standard section with the derrick, align it with the keyhole on the riser and rack below the standard section, put down the hook and fasten it with bolts;

* Loosen the hook, turn the boom back, and tighten all bolts with a tightening torque of 300n * M；;

* According to the above method, connect the standard sections in turn until the required height is reached. With the increase of the guide rail frame, the wall-attached pole should be installed at the same time, and the verticality of the guide rail frame should be checked. Its verticality deviation shall conform to the specifications and standards stipulated by the state;

* If on-site lifting equipment such as tower crane is used to install the guide rail frame, 4-7 standard sections can be connected into a group on the ground first, and then hung on the track frame;

Note: If there is a counterweight chute on the standard joint, ensure that the dislocation difference at the joint is not more than 0.8 mm. 。

F. Install three types of connection frames:

Note: The maximum horizontal inclination of the frame attached to the wall shall not exceed 8 degrees.

G. installation of counterweight:

* After the installation of hanging cage and outer cage, it is best to hoist the counterweight in place before the standard section is heightened;

* Install a buffer spring at the counterweight position of the foundation;

* Use the lifting device to load the counterweight into the counterweight chute;

* Check the clearance between the counterweight guide wheel and the slideway: 0.5MM, to ensure that each wheel rotates flexibly;

H. installation of crown block and wire rope:

* When the guide rail frame is installed to the required height, the hoist with counterweight should be installed with pulley and the counterweight should be hung with steel wire rope;

* Hoist the crown block, pulley wire rope and wire rope rack to the top of the hanging cage, and prepare rope clamps and bolts.

* Fix the wire rope frame on the hanging cage;

* Hoist the hanging cage to a place 0.5m away from the top of the guide rail frame, install the crown block to the top of the guide rail frame with a derrick and fix it with M24 bolts;

Note: When the cage reaches the maximum lifting height, ensure that the counterweight of the cage is above 550 mm from the ground.

* install pulley;

* Pass the wire rope through the pulley on the ground counterweight and the crown block pulley. Fix the steel wire rope on the counterweight with a rope clamp;

Note: When putting the wire rope up and down from the top of the hanging cage, the weight of the wire rope should be considered.