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Some precautions when using the elevator to construct

Nov 01, 2018

First, the machine room part

   1. Is the height of the machine room sufficient? When measuring the height of the machine room, pay attention to the accurate data from the upper mark of the perforated surface of the wire rope to the lower edge of the hook, not to the top plate of the machine room. This part often has misunderstandings when looking at the drawings. The current architectural blueprint generally has a sectional view of the elevator shaft. The design on the architectural blueprint is the height of the engine room floor. This layer height is completely inaccurate. First of all, pay attention to whether the hoistway part of the machine room has a partial elevation. If there is any, the height of the floor marked on the blueprint should be reduced by the height of the lifting, and then the thickness of the roof of the machine room should be subtracted; the hook of the machine room is often done. The hoisting beam is lifted, and most of the machine hoisting beams are made into the lower sill, so the size of the lower sill and the size of the hook are also subtracted. It should also be noted that the civil construction progress of the whole project has not been completed during the measurement, so it is necessary to confirm whether the concrete cushion is to be used on the remaining surface of the machine room, and if so, the cushion size should be subtracted ( About 100mm).

    2. The area of the machine room. The area of the equipment room is not a simple plane measurement. It should consider the placement of the main unit and the control cabinet, the orientation of the door and the lighting and lighting. At the very least, it is necessary to meet the dimensional data of the control cabinet in all directions. For example, the distance between the front of the control cabinet and the manufacturer behind the wall is different. There is also the problem of large machine room and small machine room. In a general sense, the small machine room means that the machine room and the hoistway have the same depth, and the large machine room is more than double the area of the hoistway.

    But now some manufacturers' technical standards are not up to standard. The small machine room they are talking about is slightly larger than the area of the hoistway, but the large part generally does not exceed one-fifth of the hoistway area. In this case, it should be noted that we cannot simply consider the large computer room because the computer room area is larger than the well area.

    3. The door of the machine room. When looking at the drawings, the size of the doorway of the machine room is often ignored by us, and it may be irrelevant to the technical parameters of the elevator. However, if you do not pay attention to this item, it may cause great trouble to the elevator installation. For large computer rooms, it should be noted that the doorway should be far away from the installation position of the traction machine, and the doorway should be opened outwards. The height of the doorway can meet the entry requirements of the traction machine and the control cabinet. For the small machine room, the position of the door is more strict, and the door must be reserved in strict accordance with the manufacturer's machine room layout. 5 M1 }# i3 o( {" Z! x5 o

    4, leaving holes in the machine room. The hole in the machine room is divided into two parts: the wire rope perforation and the I-beam socket. The reserved holes in these two parts have different technical reservations due to the different machine room layout of each manufacturer. Even if it is a manufacturer, different types of elevators, reserved holes. The location is also different. The most common mistakes in this part are usually two, one is not paying attention to the direction of the hole, but the hole is left, and the second is the I-beam socket on the wall is easy to be ignored, if the machine room wall is a masonry wall Fortunately, if it is a shear wall, it is quite troublesome to go through such a big hole, and it also involves structural problems. 5 B) _* }0 q. f' O0 g

    5. Ventilation and temperature and humidity control. According to elevator manufacturer requirements and civil engineering design requirements. 9 Q8 I" [: G. ^8 c6 c( i

    Second, the hoist part 1 U, e ( Y- V0 H* \2 @

    1, the size of the hoistway. The size of the hoistway should be measured in consideration of the smoothness of the hoistway wall. If there are protruding beams or columns in the hoistway, we must strictly record the position and size of the bulging part, instead of simply confirming the hoistway size with the minimum distance of the hoistway of the protruding part. (If the hoistway size is calculated by the minimum distance of the protruding part, it will often mislead the manufacturer, causing most of the guide rail brackets to be not long enough when the elevator is installed.) When measuring the hoistway size, if the actual hoistway size is close to the minimum specified by our standard drawings Dimensions, the verticality of the hoistway should be measured with plumb. It is easy to see the misunderstanding of the civil engineering blueprint. It is necessary to distinguish the difference between the net size and the axial dimension of the well and know how to calculate it. Moreover, the protruding part of the well may only exist at a certain level, so it is necessary to look at the drawings. When the floor is relatively high (more than fifteen or six floors), the width of the lower wall may be greater than the width of the upper wall. For example, the wall of the elevator shaft of a building has a width of 300 on the floors 1-6 and a width of 200 on the 7-16 floors. This results in different sizes of the elevator bottom and the first landing, so each floor must be measured during the survey. When the size of the hoistway is too large, it should be noted that each manufacturer has different standards. If the limit size is exceeded, the steel beam, column or isolation net, or the heightening of the fence, will be involved, which involves cost issues. To be determined before the contract is signed

     2. Top level height and pit depth. The height of the top floor refers to the size of the bottom of the highest level station that can be reached from the elevator, up to the bottom of the wire rope. The depth of the pit is the floor from the lowest level of the elevator, down to the floor. The size of the floor to which the rails are exposed. The top height, pit depth, and lift height constitute the total height of the hoistway. The misunderstanding that is easy to occur is that the top layer has protruding beams, and the bottom pit has a ground beam or a bolt base protruding. For example, at the top of the inside of the elevator shaft, there is a beam protruding from the hoistway on the side. If the distance from the ground of the highest station to the lower edge of the protruding beam is greater than the minimum size of the elevator business design, then it is fine, but still To be marked from the drawing. If it is smaller than the business design size, and the width of the protruding part is also found in the well, it is necessary to contact the design department and the quality inspection department to adjust the height of the car or coordinate the acceptance. 2 E0 j0 p0 X6 g

     3. Door size. The size of the doorway referred to here refers to the size of the elevator door reserved by the civil works, not the size of the door opening of the elevator. The position of the door should be strictly in accordance with the size of our drawings, especially the side-weight elevator. The door is often not in the middle of the width of the shaft. Pay attention to the deviation of the door. The size of the door hole must also be strictly in accordance with the drawings. The misunderstanding that is easy to occur here is that under normal circumstances (the door height is 2100), the reserved height of the door hole is at least 2170 or 2200 from the decorative elevation instead of the structural elevation. When the floor height is lower than 2600, the height of the doorway should be changed to 2000, and the door opening should be changed to 2070. The size of the outer call and the size of the fire-fighting hole shall also be reserved in strict accordance with the drawings, so as not to affect the decoration of the construction side, and the height can be changed to the outside. When the two elevators are connected in parallel, the position of the outer call hole should be paid special attention. The positions reserved for the split type and the two-in-one type are different, and the construction party must make reservations in advance, especially when the reserved part is made of concrete. The door frame fixed steel bars on the side of the door hole should also be reserved in advance to avoid the cost of our steel bars.

     4. Well material. At present, most of the well materials in the site have three brick-concrete structures, shear wall structures (concrete) and steel structures. When the structure of the hoistway is brick-concrete, it is necessary to add a ring beam according to the drawings of the elevator manufacturer, or add one to the middle of each layer, but it should be explained with the manufacturer to avoid the situation of less brackets. Moreover, the distance between the adjacent two ring beams in our drawings is the axial distance, not the net distance between the two ring beams. This is very important. The height of the ring beam is generally not less than 200, and the width is the same as that of the wall of the hoistway. Two or three walls can be added according to the difference of the side counterweight and the rear counterweight. It is best to make a steel cage for the ring beam, and it is also possible to use plain concrete with a high point. The door lintel must be greater than or equal to the width of the hoistway, and the height is not less than 300, so as to avoid the position of the door head can not be fixed, and the cost of wall bolts is generated. When the hoistway structure is a shear wall, the reserved holes such as the outer call must be made in advance, unlike the masonry wall, or it can be worn later, because there are steel bars in the shear wall and the structure is involved, and it is very troublesome later. . + ^. B- | b- ?% s: c. ^8 V

     5, cattle legs. This part of the ox leg is the easiest to be ignored by the civil construction party. Even if it is noticed, it will be deliberately not done because of the trouble. Therefore, it must be proposed during the survey or contract negotiation, and it may not be made in advance, but it must provide the ridge reinforcement and post-irrigation, and we will cooperate with it. 3 q [& E+ ?7 o

     6, verticality. The most important thing to note is the direction in which the door is installed. If the deviation of the verticality is too large, it is easy to generate the cost of the door bracket, and if the door is decorated, some door covers cannot be installed.


This article tags: elevators, civil construction, exploration, some precautions