Prefabricated building exterior wall panel drainage structure

Abstract

The invention relates to the technical field of building construction, and discloses a prefabricated building exterior wall panel drainage structure. A drainage tube comprises a telescopic baffle plate and a rigid water guiding tube, the telescopic baffle plate and the water guiding tube are arranged obliquely downwardly, the telescopic baffle plate is communicated with the water guiding tube by aflexible water tube, a pedestal is arranged at the bottom of a cavity, the pedestal is hinged to the lower end surface of the telescopic baffle plate, the bottom of the cavity is fixedly connected with an expansion airbag, the telescopic baffle plate includes a first segment and a second segment, the second segment sleeves at the inner side of the first segment, a triggering switch and a controller are arranged below one end, away from the water guiding tube, of the second segment, and a gap exists between the end part of the second segment and an interior wall; and the end part, close to thewater guiding tube, of the second segment is fixedly connected with a first connecting rod, a cylinder and an air pump are arranged below the water guiding tube, a piston rod is hinged to the first connecting rod, and the expansion airbag is communicated with one side, away from the air pump, of the cylinder through a second air tube. The structure completely drains water at the bottom of the cavity, avoids contact with the interior wall when meeting water, and avoids cracking of an exterior wall panel.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an assembled building exterior wall board drainage structure. Background technique [0002] The prefabricated building is to disassemble the structure of the building according to certain specifications, then carry out prefabrication in the factory, and finally transport it to the site for assembly. Since the prefabricated exterior walls are assembled in blocks, it is inevitable to encounter the problem of waterproofing the joints. Due to the on-site assembly of accessories, a large number of assembly seams will be left, and these seams can easily become channels for water penetration. Therefore, prefabricated buildings have certain inherent weaknesses in waterproofing. The external wall panel of the prefabricated building is used as the outer protective structure part. The horizontal and vertical connections of the joints are generally processed by glueing. Howeve...

AI Technical Summary

Problems solved by technology

However, the above scheme has the following problems: 1. When the rainwater enters the cavity in the wall along the joint, the rainwater flows into the sump along the cavity. The outer surface of the pipe string itself has a certain wall thickness, and there will be a certain height error between the pipe string and the bottom of the pipe seat, and a part of the water at the bottom of the sump will not be drained out, resulting in insufficient drainage, so that the entire cavity Humidity is high, so that the external wall panels are in a humid environment for a long time, which is prone to cracking or mildew

2. When the rainwater enters the cavity in the wall along the seam, the rainwater flows into the sump along the side of the cavity away from the inner wall. When there is a lot of rain, the rainwater will overflow from the sump. The inner walls are in contact with each other, so that the inner walls are soaked in rainwater. Since the inner walls are located inside the walls, the speed of removing water and moisture is relatively slow, so the humidity in the entire cavity is relatively high, making the outer wall panels stay in damp for a long time In the environment, it is prone to cracking or moldy

3. When there is a heavy rain outside, the impact of the rain on the outer wall panels and the joints is relatively large, and a lot of rainwater will enter the cavity along the joints, resulting in insufficient drainage, and it is easy to make the gaps between the joints of the outer wall panels become larger, reducing the stability of the spliced ​​structure of the exterior wall panels

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