Portable limit axle load meter detection points
Portable axle load meter, also known as portable axle load meter, portable weighing instrument, portable electronic pound, etc., belongs to the automobile dynamic weighing scale. The main functions of the portable axle load meter are the axle load measurement, the limit overload detection, etc., especially convenient and efficient.
The portable axle load meter is divided into wired transmission data and wireless transmission data. Most units in the Zui use wired portable axle loaders. Later, because the cable weighing instrument is easy to break, most units are now in The use of wireless portable axle load meters, and with the development of technology, wireless portable axle load meter is more user-friendly.
Let's take a look at the key points of the portable limited axle load meter:
* According to the scheme determined by the previous selection, the static load module and the dynamic load module are correctly distinguished and installed in a suitable position. The fixed module, the semi-floating module and the full floating module are different in shape from the contact surface of the upper top plate of the module and the pressure receiving head, and are easily distinguished. If the module is mismatched during installation, the use of the weighing instrument will be greatly affected. The layout of these three modules during installation requires that the semi-floating modules should be mounted on the opposite corners of the fixed module. The distance between the two mounting points is long between all mounting points.
Second, to obtain a set of accurate weighing stings, it is necessary to ensure that all sensors are vertically stressed, all sensors are evenly stressed, and the sensor and its supporting parts should be designed to be as level as possible. , straightness, rigidity and parallelism requirements. If the tilting force of the sensor is not a vertical force, the accuracy of the sensor will be affected.
In a set of weighing instruments, in order to ensure the average price of each module, the flatness of the installation foundation of each weighing module should be within 0.3mm, and the basis of each module should be in the same horizontal plane. Between 0.3mm, the flatness of the connection with the weighing module should be within 0.3mm. This installation makes the whole set of instruments have no angular difference, and each module can be accurately stressed to accurately measure the weight of the material. After the weighing instrument is installed, the disturbance at the top and bottom of the module should be less than 0.5 degrees during the loading from zero to full scale of the material. This requires the installation of the support foundation and the rigidity of the weighed container is the key to whether the sensor can feel the pressure.
When installing different modules in a weighing instrument, install them on different support bases as much as possible to avoid placing them on the same support base, causing the measurement to affect each other. When supporting the foundation according to the chapter and welding the lugs on the tank, keep the two levels so that the level of the weigh module can be guaranteed after the weighing module is installed, so that the material weight is positively pressed on the sensor module.
The connection between the module and the foundation and the support surface is bolted to facilitate post-maintenance and to avoid welding connections as much as possible. When soldering the foundation or other mounting components, be sure to pay attention to the grounding of the welder. When welding work above the upper plate position of the module, the welding ground wire should be placed on the equipment above the upper top plate position. Similarly, the grounding synchronously moves the lower part when welding the lower part. It is forbidden to pass the welding current through the weighing module body to avoid damage to the sensor. When fixing the sensor, the center line of the sensor should be coincident with the center line of the tank lug. The purpose is to make the weight positive pressure on the sensor head and the measurement accuracy is higher.
Third, the load cell is installed outdoors, and protection measures should be taken as far as possible to prevent the weighing from being disturbed by the harsh weather. Rain, snow, and ice cannot accumulate on the scale body, otherwise it will cause a lot of error when weighing. If the ambient temperature difference between the load cell and the ambient temperature is large, in addition to selecting a suitable load cell, measures such as installing a heat shield should be taken during installation to keep the ambient temperature as stable as possible.
Fourth, after the weighing module is installed, the material on the container body, the gravity of the equipment, etc. can only be supported by the weighing module, and no other supporting point can provide any supporting force to the entire weighing container body. The load cell must be movable relative to the upper top plate of the fixed tank container, which also determines that the tank container is movable relative to the basis of the fixed weigh module, and is not fixed and non-sloshing. This requires measures to prevent the can container from tipping over due to excessive shaking. Protect the scale from overturning with a unique anti-overturn bolt design on the static load module or the dynamic load module. Once the weighing container or tank is shaken by factors such as wind, the module's anti-overturning bolts will stabilize the container or tank to be tested, allowing it to move in a small range without tipping over.
Fifth, in the weighing system, the raw materials are input and output through the pipeline to the container to be tested, and the pipeline connects the weighing container with the equipment other than the container as a whole. Weighing gauge measurements can only measure the weight of the tank container containing the material placed on the load cell. This requires that the outer tube of the container be disconnected from the weighing container so that the weighed container becomes a separate part. In order to be able to transport the material and to block the influence of the external pipe on the measurement, all pipes connected to the weighed tank container must be connected by means of a soft connection.
Sixth, some tanks are sealed containers because of the process. When the materials flow in or out quickly, they will drive the flow of internal air, causing the air in the tank to transfer, resulting in unbalanced air pressure in the tank. Lead to the occurrence of weighing errors. When designing the tank, vents or pressure relief valves should be left to prevent this from happening.
If you have any questions or what else needs to be, Shanghai Yue Heng Industrial Co., Ltd. is happy to efficient labor!
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