Elevator Counterweight Frame For Different Traction Ratios
Oil can
Guide shoes
Counterweight frame
Lock device
Buffer striking end
Counterweight block
Compensating fastener
Suspension device(sheave pulley or rope suspension)
We can also customize according to your requirements
The counterweight frame is made of channel steel or 3～5 mm steel plate folded into channel steel shape and welded with the steel plate. Due to different use occasions, the structure of the counterweight frame is also slightly different. According to different traction methods, the counterweight frame can be divided into two types: wheel counterweight frame for 2:1 sling method and wheelless counterweight frame for 1:1 sling method. According to different counterweight guide rails, it can be divided into two types: counterweight racks for T-shaped guide rails and spring sliding guide shoes, and counterweight racks for hollow guide rails and steel sliding guide shoes.
When the rated load of the elevator is different, the specifications of the section steel and steel plate used in the counterweight frame are also different. When using different specifications of section steel as a counterweight straight beam, a counterweight iron block corresponding to the size of the section steel notch must be used.
The function of the elevator counterweight is to balance the weight suspended on the side of the car by its weight to reduce the power of the traction machine and improve the traction performance. The traction wire rope is an important suspension device of the elevator. It bears all the weight of the car and the counterweight, and drives the car up and down by the friction of the traction sheave groove. During the operation of the elevator, the traction wire rope is bent unidirectionally or alternately around the traction sheave, guide sheave or anti-rope sheave, which will cause tensile stress. Therefore, the traction wire rope is required to have high strength and wear resistance, and its tensile strength, elongation, flexibility, etc. should all meet the requirements of GB8903. During the use of the wire rope, it must be inspected regularly according to the regulations, and the wire rope must be monitored in real time.
1. Set up an operating platform at the corresponding position on the scaffold (to facilitate the lifting of the counterweight frame and the installation of the counterweight block).
2. Tie a wire rope buckle on two opposing counterweight guide rail supports at an appropriate height (to facilitate lifting of the counterweight), and hang a chain in the center of the wire rope buckle.
3. A 100mm X 100mm wooden square is supported on each side of the counterweight buffer. When determining the height of the wood square, the overtravel distance of the elevator should be considered.
4. If the guide shoe is spring type or fixed type, remove the two guide shoes on the same side. If the guide shoe is roller type, remove all four guide shoes.
5. Transport the counterweight frame to the operating platform, and hook the counterweight rope head plate and the inverted chain together with a wire rope buckle.
6. Operate the rewinding chain and slowly hoist the counterweight frame to a predetermined height. For the counterweight frame with spring-type or fixed guide shoes on one side, move the counterweight frame so that the guide shoes and the side guide rails are aligned. Keep contact, and then gently loosen the chain so that the counterweight frame is steadily and firmly placed on the pre-supported wooden square. When the counterweight frame without guide shoes is fixed on the wooden square, the two sides of the frame should be aligned with the end surface of the guide rail. The distances are equal.
7. When installing fixed guide shoes, ensure that the gap between the inner lining and the end surface of the guide rail is consistent with the upper and lower sides. If the requirements are not met, shims should be used for adjustment.
8. Before installing the spring-loaded guide shoe, the guide shoe adjusting nut should be tightened to the maximum so that there is no gap between the guide shoe and the guide shoe frame, which is easy to install.
9. If the gap between the upper and lower inner lining of the guide shoe slider is inconsistent with the track end surface, use a gasket between the guide shoe seat and the counterweight frame to adjust, the adjustment method is the same as that of the fixed guide shoe.
10. The roller guide shoe should be installed smoothly. After the rollers on both sides press on the guide rail, the amount of compression spring of the two rollers should be equal. The front roller should be pressed tightly with the track surface, and the center of the wheel should be aligned with the center of the guide rail.
11. Installation and fixing of counterweight
①Apply a platform scale to weigh the weight blocks one by one, and calculate the average weight of each block.
② Load the corresponding number of counterweights. The number of weights should be calculated according to the following formula:
The number of counterweights installed=(car weight + rated load×0.5)/weight of each counterweight
③Install the anti-vibration device of the counterweight as required.