In addition to ensuring the quality of the screen body, the pillar type LED display has an important place that must be considered, that is, the pillar of the LED display. The inspection of the safety of the pillar of the outdoor LED screen module can mainly be carried out in the following three aspects.
01 Inspection Of The Base Of The LED Display Column
There are two main forms and arrangements of the foundation: 1. One is the balanced gravity type, that is, the upper load is mainly balanced by the large-volume foundation gravity, which is generally a concrete foundation. This base form is suitable for use when the soil is soft and has an open construction site. 2. The other is a pile foundation type, which is mainly a reamed pile. This type of foundation method can be selected under the condition of limited construction site. When determining the base of the advertising screen, it is first necessary to check its initial drawings and construction materials, and then excavate the base if the conditions agree, and check whether the base method, burial depth, and scale are in accordance with the drawings. LED display base bolts are sampled for strength testing. For other site surveys, when choosing an advertising screen with a balanced gravity foundation, special attention must be paid to the presence or absence of foundation soil bulges around the roots of the steel columns, and the foundation formed after the foundation is shaken under wind load. The collapse of the soil surface, if any, indicates that the anti-overturning of the base can not meet the requirements, and there is a danger of collapse at any time under the action of strong wind, and it must be reinforced immediately.
02 Check The Material Of The Column And The Quality Of The Connection With The Foundation
First of all, it is necessary to measure the deviation of the steel column of the LED display. The deviation of the steel column cannot be greater than 1000 / H. It must be measured in two directions. Secondly, the steel quality of the steel tube column of the advertising screen can be checked. It is divided into uniformity, whether there are interlayers, cracks, non-metallic inclusions and significant segregation. When there is doubt about the quality of the steel, the safety of the structural members shall be ensured. Finally, check whether the steel pipe column is corroded and the quality of the steel structure protective coating. The quality of protective coatings for steel structures shall be tested in accordance with the relevant national equipment standards.
Outdoor LED display steel pipe columns and foundations are generally bolted or welded. For bolted connections, check for missing bolts during inspection, and the bolts must not be deformed, slipped, loosened, etc .; if there are design drawings, the specifications and models of the bolts must meet the design requirements; the bolts should be rust-proofed. If the corrosion is serious, it must be replaced immediately, and the bolt fastening should be firm and reliable. For high-strength bolts, the embedment depth of the bolts must meet the requirements of the specification.
03 Inspection Of The Upper Steel Frame Member System
At present, the connection between the steel column and the upper steel frame member system is usually in the following two forms: 1. One is T-shaped, and the main frame is formed by the T-shaped fixed connection between the steel column and a horizontal main beam on the upper part. The LED display screen is connected to the T-shaped rigid frame structure through each pendant and diagonal support. 2. The other type is a space truss, whose main skeleton is welded by an independent steel column and several horizontal main beams parallel to each other. The main beams are connected by horizontal and diagonal supports to form a space truss system. The display is mounted directly on the main frame.
Due to the heavy weight of the outdoor LED display column, there will be some hidden safety hazards after using it for a period of time. The main structure of the LED display must be regularly inspected and maintained to ensure safety.