The working pressure damage of the general constant speed electromagnetic flowmeter with high measurement accuracy is much smaller than that of the orifice plate, only 5-10% of the orifice plate; on the other hand, because the pressure loss is small, the gas pressure will be small (the pressure difference between the high pressure and the bottom pressure), which will promote the regulation of selecting the differential pressure transmitter and increase the cost, otherwise the output accuracy of the intelligent transmitter will be reduced, because the measurement range is not available Ensure full scale. Therefore, a good probe must have both pressure loss and gas pressure. The design scheme of special geometric figure surface of delta air flow meter of Xiyuan instrument takes this factor into consideration. The cross section itself is symmetrical, and the slope is divided into three parts. The head-on part is a smooth section, which makes the probe touch the substance smoothly; the second part is an acceleration section, which speeds up the average water flow of the substance by three times. According to the lifting and the surface of the substance, the head-on section is lifted The third part is the peak of the high pressure and low pressure interface. The friction resistance suddenly subsides, and the bottom pressure area is generated behind the probe. The specific colorful velocity spectrum can fully reflect the change of material water flow. Therefore, the design scheme of flowmeter type considers the provisions of small pressure loss and large gas pressure.

The low-cost operation has experienced third-party testing, and according to the new data and information, although in a very short takeover section, it can also achieve 1% precision. The nozzle section with 1% precision is much shorter than that of general goods. The repeatability was 0.1%. Because the pressure loss is small and the damage to the probe is small, if the installation is suitable according to the construction science regulations, the high precision can be maintained for a long time.

Because the pressure loss is small, the damage of driving force in the pipeline is small. Generally speaking, the operation cost of delta controller of Xiyuan instrument is only one tenth of that of orifice plate.

Because the hole is big, it is not easy to block the controller, which is a plug-in working mode of vortex flowmeter, has the characteristics of easy installation and easy operation. For most of the basic pipe diameter, only a small round hole is opened in the pipe. The detaba steam flowmeter of Xiyuan instrument has a diameter of 35mm, and then the probe installation base is welded with the pipeline by electric welding. After the controller is tightened, the foundation can be installed on site. The labor volume is 15% of the installation orifice plate. According to many years of installation experience, drilling must take five minutes, welding probe waterproof sleeve for five minutes, inserting fixed probe for two minutes, installing three valve group for two minutes, installing differential pressure transmitter for three minutes, wiring for two minutes, and the whole process only takes about 19 minutes (integration). Optional integrated or split type installation: deltaba probe of Xiyuan instrument is an integrated probe in the whole practical sense. No matter whether the measured substance is vapor or liquid or high-temperature saturated steam, it can install the differential pressure probe, temperature and working pressure measurement and differential pressure transmitter on one probe. There are 10 interfaces between the probe and differential pressure transmitter There are various kinds of coolers that can be selected. They are professional saturated steam coolers, high-pressure flanges that can be used to connect intelligent transmitters immediately, and simple R1 / 2 ″ inch thread. They can show various connections of split / integrated installation, and various requirements can be considered. For saturated steam, most of the products are required to be installed in a separate way, and must be equipped with coolers and other spare parts. The detaba steam flowmeter of Xiyuan instrument is connected to the cooler, and the stop valve or gate valve are uniformly presented. It is reliable, easy to operate, and it is a real integrated performance probe.

For soot measurement or vapor / liquid measurement with particles, the problem of plugging is the problem most customers pay attention to. Xiyuan instrument company ensures that if the floating dust in the material does not exceed 13b250g / m3, all maintenance and purging are not required for the probe of deltaba of Xiyuan instrument. From the perspective of hydrodynamics, all kinds of wedges in hydrodynamics will have hydrodynamics deposition in the front development, which will increase the working pressure and reduce the working pressure behind the wedge. No matter how high the pressure is or how small the bottom pressure is, the floating dust in the fitness exercise is likely to enter the hole in the wedge. When the hydrodynamics is stationary, because of Brownian motion, the floating dust will enter into the wedge hole. Therefore, the problem does not depend on the high and low working pressure, nor on any kind of cross-section, but on how to let the floating dust out without deposition. There is no doubt that timing the purge is a solution. Xiyuan enterprise has done a lot of scientific research on the hole distribution and diameter of the probe. The large diameter (8mm) dirt is very easy to enter and exit; the left and right two holes are close to the edge of the probe (the edge of the pipeline), and the dirt is not easy to deposit. Small diameter, no doubt, will lead to not easy to enter, not easy to exit, and into is absolute, how much is only a matter of time. The hole of other products is much smaller than that of delta steam flowmeter of Xiyuan instrument. For vertical pipes, the inspection rod can be installed on all parts 360 ° along the pipe circle, and the high-pressure and low-pressure pressure pressure tee joint shall be on the same level surface.

Delta bar steam flow meter is a kind of air flow meter which is designed with differential pressure principle and plug-in installation method. In principle, it is a unique throttling device whose output is gas pressure. The controller takes pressure according to the probe (or probe), and there are two lines of uneven pressure holes (diameter of pressure pipe Φ 20, bottom pressure diameter of pressure hole Φ 8) in front and back of the probe. According to the mean value of different working pressure (water flow) of the pipeline from top to bottom (from left to right), the gas pressure is generated, so that the mass flow or volume can be measured