By weighing sensor composed of pull pressure sensor, because of its flexible assembly, cheap price, the application in the chemical industry has its originality.

Pull pressure sensor and its characteristics

1, pull pressure sensor

Pull pressure sensor is a kind of practical structure accessories for the sensor. The structure is composed of a top plate, a base plate, a weighing sensor, a load supporting column and a supporting bolt.

According to the different load supporting column and top plate, three kinds of structure are fixed, semi floating and floating. In a weighing system, the use of a fixed module, a semi floating module, and the rest with a floating module to make up, generally divided into three sets and four sets. Three only one set for three support, four for four point support. Pull pressure sensor can be very convenient to install on the containers of various shapes for on the improvement of the existing equipment, regardless of the container, a hopper or reaction kettle, and pull pressure sensor can become weighing system.

2, pull pressure sensor characteristics

Compared with the existing electronic weighing apparatus and pull pressure sensor, the biggest characteristic is not subject to site constraints, flexible assembly, convenient maintenance and low price.

Loadometer scale for weighing platform, to certain covers an area of, and pull pressure sensor is mounted in the mounting point of the container, without also covers an area of. Especially suitable for a plurality of containers are arranged in parallel and narrow space. Electronic weighing scale and indexing values have certain specifications, and pull pressure sensor is composed of the weighing system, range and degree of value in instrument allowed range, according to their own needs. Pull pressure sensor maintenance is convenient, if the sensor is damaged, you can adjust the support screw will be the top of the scale, do not need to remove the pull pressure sensor, you can replace the sensor. In addition, because the pull pressure sensor is simple in structure, the weighing system is composed of a pull pressure sensor, and the investment is relatively small.

Two, pull pressure sensor in the application of chemical industry

In the process of material storage and production, a large number of storage tanks and metering tanks are used in the process of material storage and production. But generally encountered two problems, one is the measurement of materials, the two is the control of the production process. According to our practice, the application of electronic pull pressure sensor can be a better solution.

1, pull pressure sensor used in material measurement

Generally speaking, the current measurement of liquid storage tanks, most of which are used to measure the scale or flow meter. But these two methods are based on the volume measurement, and then according to the density of the liquid is converted into weight. Due to the density and temperature and other factors, error is relatively large, although there are mass flowmeter, but because the price is expensive, general enterprises seldom used, so electronic pull pressure sensor directly said out the weight of the material is more economical and practical.

2, pull pressure sensor applied to liquid level indication and control

The liquid level is an important control parameter in the process of chemical production. Usually a liquid level indicating besides the field of liquid level indicating instrument, the general use of the transmitter to liquid level signal is converted into standard electric or pneumatic signal transmission to the control room. But this approach, in addition to the previous because of the density change caused by the error of the liquid level, there may be due to material crystallization, blockage caused by false liquid level situation, and even lead to serious accidents. In addition, due to the measurement of the transmitter is directly in contact with the measured medium, for some corrosive media, it is necessary to choose a high price of corrosion resistant materials. And pull pressure sensor is not directly contact with the measured medium, the above shortcomings are not exist. The weighing display instrument can be used to take the analog output interface, and the recorder and the controller can realize the automatic recording and control.

3, pull pressure sensor is applied to the situation of the strict requirements of the feed quantity

There are a number of production process for the amount of feed has strict requirements, many companies have put the metering tank directly on the ground to control the amount of feed. But on the ground scale maintenance or verification, it is required to use lifting equipment to lift the metering tank down, more trouble. If the electronic pull pressure sensor is adopted, the measuring groove itself is used as the scale body, thus the lifting problem is not existed, and the maintenance is convenient.

Three, pull pressure sensors to buy, install, debug notes

1, choose to pay attention to matters

Pull pressure sensor of choose and buy, according to the general container bearing point to choose 3 A or 4 only a set of module range, due to the exist scale (container) weight and vibration impact, partial load and other factors, general according to the following rule selection. Multi sensor static weighing system:

Fixed load (a scale, containers, etc.) + variable load (weighing load) is less than or equal to choose sensor rated load x with sensor number x 70, which 70% of the coefficient is vibration, shock and partial load factors and considerations.

In addition, we should pay attention to whether there are explosion-proof requirements, flammable and explosive occasions, the use of explosion-proof type of sensor should be selected.

2, installation notes

(1) to pay attention to the level of adjustment, including the installation of a single module plane and a set of tension between the sensor level adjustment.

(2) when the welding sensor can not pass the current, welding top plate, the wire should be connected to the scale body, welding bottom plate, the ground should be connected on the basis of the ground to prevent damage to the sensor.

(3) if the weighing body has a transmission pipeline, it should be replaced by a hose, or to make the connection pipe as long as possible, in order to prevent them from eating the real load caused by the sensor error.

(4) to weld a weight check table in the container for verification. Containers generally have no place to place the weight, need to solder a platform to place weights. Usually welded in the bottom of the container, easy to place the weight up and down.

(5) the junction box must pay attention to moisture, the excess hole to use the sealing plug head