Elevator brick mixing well circle beam position alignment - Database & Sql Blog Articles

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First, from the bottom pit up (not the least) from the ground, plus the first ring beam, and how far from the top of the shaft to add a ring beam, according to three:

(1) The rail bracket cannot be reached at the junction of the two rails. The length of the guide rail is 5 meters and 4 meters. Most domestic elevator manufacturers use 5 meters long guide rails. The lowest one step is arranged at a fixed distance (2 meters or 2.5 meters, and the freight elevator is 1.5 meters). Therefore, it is assumed that the guide rail is 5 meters long and the bottom pit 500 is the first step bracket. Above every 2 meters, the distance between the two rails must be 500, so the arrangement is very neat.
(2) The upper and lower end rail brackets must be outside the position that the car or the counterweight guide can reach. The part other than the end bracket of the rail is in a free state. If the guide shoe is moved to this position, it is disadvantageous to the guide rail and the elevator. Therefore, the lowest one-step rail bracket in the pit must have a maximum height, that is, the minimum running of the guide shoe. Below the location. The same is true at the top.
(3) The position of the guide rail bracket should be considered convenient for installation and construction. If it is convenient to install the impact drill on the bottom of the 500-station worker, if it is 300 from the bottom of the pit, how can this work?
In summary, the lowest step rail bracket of most elevator manufacturers is between 500-700. The top step rail bracket on the top layer is about 300 from the top of the shaft.
Second, what if the original shaft has been added with a ring beam? Then, if the spacing of the ring beam exceeds the spacing of the guide rail brackets, a ring beam should be added in the middle. The added ring beam should be careful not to catch the rail connection. The ring beam spacing is the center-to-center spacing of the ring beams, not the edge spacing. If you want to save material, then look at it layer by layer. If the original ring beam is slightly larger than the bracket spacing specified in the drawing (for example, the drawing specifies 2 meters, the actual is 2.2 meters), there is no need to add a step in the middle. The inspection department will generally not pursue it. For how to prevent the overlap of the rail joint and the bracket when the ring beam is added, it is impossible to install. Draw a sketch, and compare the circle beam spacing diagram and the bracket spacing diagram at a glance.
Third, the height of the ring beam is generally required to be 300 in the elevator factory. Here, there is an adjustment margin, the height is 300 (or more), which means that the upper and lower adjustment range is more flexible when installing the rail bracket, and it is easy to avoid the rail bracket and the rail connecting plate. Strikes when hitting or hitting the expansion bolts. In fact, if the position of the hoistway ring beam is very accurate, a height of 200 is enough (no need to adjust up and down when installing the bracket).

Fourth, it is not acceptable to make expansion bolts on non-reinforced concrete. The steel bars in the ring beam are composed of four main ribs and stirrups surrounding the main ribs. The main ribs are generally 10 mm or more in diameter, and the stirrups are above 5 mm. Or 150 laps, the specific specifications of the steel bar are calculated by the civil engineering design unit according to the load.

To add: the hoistway ring beam is allowed to open, as long as it is arranged on the side of the hoistway with the rail bracket, but both ends must be connected to the column. If there is no column, the ring beam must be closed.