Weighbridges can be divided into L-shaped steel scales, U-shaped steel scales, channel steel scales, I-shaped steel scales and reinforced concrete scales (commonly known as cement scales) according to the scale structure. L-beam is the latest connection structure of ground scale, which can be said to be the fifth generation product of industrial weighing instruments. The patent number is ZL20 1 120545764.0. A large-tonnage weighbridge usually consists of several interconnected scales. The traditional connection structure is to add a plurality of supporting pieces on the side plate of the scale, and weld small steel plates at the upper ends of the supporting pieces to form the top plate of the connecting parts. Under the pressure of large-tonnage vehicles, this structure will cause small steel plates to bend quickly after frequent use, damage the connection parts between weighbridges and affect the overall service life of weighbridges.
The utility model provides a connecting structure of an L-shaped scale, which belongs to the patent technology of weighing of weighing sources at present. The connecting part is formed by the cooperation of the extended bearing beam and the integral steel plate, so that the surface of the connecting part is connected into a whole to share the pressure, and the bearing beam ensures the bearing capacity and will not bend after long-term use, so it is suitable for practical use in the scale connecting part of the super-large scale. 1. Comparison between channel steel and U-shaped steel.
Why do you choose to be a U-beam weighbridge instead of a channel weighbridge? This is for you:
(1) Let's start with the channel steel scale, which is mainly composed of channel steel beams, connected by clapboards and sealed at the bottom.
According to the bridge principle, the bottom of the U-shaped steel scale is supported by U-shaped steel, and there are no sealing plates and templates.
Comparatively speaking, the same scale, channel steel scale is heavier than U-steel scale. The cost is higher than that of U-beam scale. The channel steel scale has a sealing plate to play the role of tension, while the U-beam does not.
② From the welding point of view, the U-shaped steel scale is fully welded, and the channel steel scale is spot welded. Therefore, the industry believes that U-shaped steel is superior to channel steel.
At present, the manufacturers of weighbridges in the market mainly use U-shaped steel and channel steel, among which the weighbridges with U-shaped steel structure have become the mainstream of the market, and the weighbridge manufacturers in the United States, Germany, China and even the whole world all adopt U-shaped steel structure and U-shaped steel weighbridges.
(3) Channel steel belongs to the third generation weighing instrument products. It is said that there are two supporting beams at the bottom of the channel steel, and the middle is empty, so the supporting performance is poor. Simply put, the proportion of steel structure is not very reasonable, and the channel steel scale is composed of steel plates. But according to the weight of the scale, the channel steel with the same tonnage is heavier than the U-beam, which is true.
U-beam is the fourth generation product of industrial weighing instruments. Bending machine is a necessary equipment for making U-shaped steel scale. The 600-ton large-scale double-machine linkage bending machine is adopted, which has high positioning accuracy and high speed, and the equipment is the most advanced in the same industry in the province. If you buy this kind of bending machine in the market, it will cost more than 600 thousand yuan, so the price of U-shaped steel scale is more expensive than that of channel steel. The steel structure is more reasonable, with good rigidity, good strength, strong lateral resistance, winding resistance and long service life. The bottom of U-shaped steel is designed according to the bridge structure.
The U-shaped steel platform adopts 5-7 U-shaped steel main beams (designed according to tonnage and table size) to ensure the overall rigidity of the platform, and the inner cavity of the platform is completely sealed and not easy to rust. After the steel plate is derusted by shot blasting, epoxy zinc-rich primer and acrylic marine paint are used, and the oil film is thick, with the thickness of 100 micron, which has stronger pressure resistance, acid resistance, alkali resistance and corrosion resistance. I-beam, also known as steel beam, is a long strip steel with I-shaped cross section. Its specifications are expressed by waist height (h)* leg width (b)* one millionth of waist thickness (d), such as "I-beam 160*88*6", that is, I-beam with waist height 160mm, leg width of 88mm and waist thickness of 6mm. The specifications of I-beams can also be expressed by models, indicating the number of centimeters of waist height, such as I-beams 16#. I-beams with the same waist height, if there are several different leg widths and waist thicknesses, should be distinguished by adding a b c on the right side of the model, such as 32a# 32b# 32c#. I-beams are divided into ordinary I-beams and light I-beams, and the specification of hot-rolled ordinary I-beams is 10-63#. The specification of the hot-rolled common I-beam supplied by both parties is 12-55#. I-beams are widely used in various building structures, bridges, vehicles, supports and machinery.
Because I-beam is rarely used in automobile weighing instrument industry, U-beam and channel steel are mainly used by domestic and foreign counterparts, so I won't analyze it in detail here.
Composition characteristics of cement scale: the outer frame is made of professional profiles, and the inner side is made of double ribs. The service life of the joint is over 20 years. Please read "Cement Scale" for specific parameters and construction technology.