Technical requirements and structural forms of electronic floor scales

Different types of structures are used for the positioners used in different situations, and of course there are different technical requirements. The technical requirements and structural forms of several types of electronic platform scales are briefly described below.

(1) Horizontal limiter used in floor scales and the like

This type is generally independent and has no direct relationship with other equipment. Therefore, the limit requirement for the horizontal limiter can be appropriately relaxed, allowing it to have a large amplitude of shaking. The standard configuration of the truck scale manufacturer is mainly composed of the three main components of the load-bearing force transmission mechanism (scale body), high-precision weighing sensor and weighing display instrument, so that the basic weighing function of the truck scale can be completed, and it can also be based on different users. Requirements, optional printers, large-screen displays, computer management systems to achieve higher levels of data management and transmission needs. At present, most of the weighbridges still retain the limit heads of the four corners of the carrier, while others use another type. In this application, the stopper acts as a safety protection, and the carrier can work safely as long as the limit gap is smaller than the allowable range of the self-resetting support member.

One is that for the level limiter of this type of floor scale, although the impact force has been largely attenuated during the movement, it still has a large magnitude, so it must have sufficient impact strength, and the second is that the limit interval must be less than The allowable displacement of the self-resetting support member is greater than the maximum expansion and contraction that the carrier may produce between winter and summer (the extension of the extension and indentation is within a certain limit).

(2) Horizontal limiter used in electronic railway scales and the like

Such stoppers are required to have sufficient strength to withstand a large horizontal impact force. Usually, they are formed by a spherical concave spherical surface. The spherical clearance is generally less than 1 mm, and the suspension is in a suspended state by the winding of the spring. It has a high hardness and does not cause pits under impact collision. In order to avoid the bypass of the metering force value and the lubrication of the contact end face, it is usually protected by a flexible rubber wave tube, and the simplified structure of such a stopper.

For this type of electronic platform, it is generally not allowed to shake. If the horizontal limiter is placed at the four corners of the load, it is extremely unreasonable, because the thermal expansion and contraction of the carrier will jam the small limit gap, so it is required. The horizontal stopper is installed in the middle of the carrier, allowing the four sides to expand and contract freely without being stuck.

(3) Horizontal limiters used in hopper scales, container scales, etc.

For electronic scales such as electronic container scales, the horizontal interference force does not determine the direction, and the larger is the tipping moment and the rotational moment. Therefore, the horizontal limiter of this type is usually completed by a single-layer or double-layer limit rod combination mechanism. Specific requirements are as follows:

1 The connecting parts at both ends of the tie rod must be active or flexible, and will not generate a metering force value bypass. Weighbridge price can be divided into: scale steel structure scale, T-beam floor scale, L beam steel floor scale, U-shaped steel platform scale, channel steel floor scale, reinforced concrete floor scale; according to the sensor type can be divided into digital weighbridge, analog floor scale . The truck scale is also known as the weighbridge. It is the main weighing equipment used for the measurement of bulk goods such as factories, mines and merchants. A common truck scale before the 1980s is also known as a mechanical weighbridge. In the mid-1980s, with the maturity of high-precision load cell technology, mechanical floor scales were gradually replaced by electronic truck scales with high precision, good stability and easy operation.

2 The fixed points at both ends of the limit rod are required to be on the same horizontal axis, and it is not allowed to generate vertical component when the tie rod is tightened.

The layout of the 3 links is required to be on the same level to avoid the tilting moment on the container when tightening.

4 The layout of the fixed fulcrum should be set on the effective limit stop line of the container. There are certain difficulties in the actual site, and it is necessary to debug with the data of the display instrument.