Today, I will introduce a national invention authorized patent-intelligent pressure transmitter. The patent was applied for by Chongqing Silian Measurement and Control Technology Co., Ltd., and the authorization was announced on March 15, 2017.
Content descriptionThe invention relates to the fields of instruments, meters and industrial automation, and in particular to an intelligent pressure transmitter.
Background of the inventionThe transmitter is a converter that converts the output signal of the sensor into a signal that can be recognized by the controller (or converts the non-electricity input from the sensor into an electrical signal and amplifies the signal source for remote measurement and control). There are many types of transmitters. The transmitters used in industrial control instruments mainly include temperature transmitters, pressure transmitters, flow transmitters, current transmitters, voltage transmitters, etc. The transmitters are commonly used Measure pressure, differential pressure, vacuum, liquid level, flow, density, etc. The transmitter uses an isolation component with an isolation diaphragm, where the isolation diaphragm will be installed in the sensor in the transmitter and isolate the sensor from the process fluid to be measured. Fluid parameters such as fluid pressure are transmitted to the sensor through the isolation diaphragm, and output after the signal is converted by the transmitter.
However, the traditional DN25 flange type intelligent pressure transmitter has a nominal size of DN25 as the mating flange connected to it, and its international general series pipe has an outer diameter of 33.7mm, which makes the important pressure-sensitive element of the pressure transmitter isolate the diaphragm. The outer diameter is only about 35mm, and the effective diameter of the corrugation is usually about 25mm. The effective diameter of the diaphragm has a certain impact on the performance of the pressure transmitter. Due to the small diaphragm and large rigidity, the DN25 flange type intelligent pressure changes in the actual application process. The performance of the transmitter is unstable, the temperature drift is large, and the repair rate is extremely high.
Summary of the inventionIn view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an intelligent pressure transmitter, which is used to solve the problem that the pressure transmitter isolation diaphragm in the prior art has a small outer diameter, a large rigidity, and an unstable measured pressure value. , The problem of large temperature drift and high repair rate.
In order to achieve the above objectives and other related objectives, the present invention provides an intelligent pressure transmitter, including: a pressure transmitter body, a flange base, and an isolation diaphragm, the flange base being arranged on the pressure transmitter body Below, the isolation diaphragm is installed at the bottom of the flange base, and the nominal diameter of the isolation diaphragm is 50 mm.
Preferably, the material of the isolation diaphragm is 316L or Hastelloy C. It also includes a sealing surface, which is welded to the bottom of the flange base by argon arc welding, and the isolation diaphragm is embedded between the sealing surface and the flange base. The nominal diameter of the sealing surface is 25 mm. The sealing surface on the flange base is installed on the mating flange through a sealing gasket. The material of the isolation diaphragm is tantalum or Monel. The isolation diaphragm is welded to the bottom of the flange base. The flange base is installed on the mating flange through a transition ring. The material of the transition ring is polytetrafluoroethylene.
As mentioned above, the intelligent pressure transmitter of the present invention has the following beneficial effects: by changing the isolation diaphragm of the traditional DN25 flange type intelligent pressure transmitter from internal to external, using 316L or Hastelloy C material isolation Diaphragm, the isolation diaphragm is embedded between the sealing surface and the flange base; or the isolation diaphragm of tantalum or Monel material is used, and the isolation diaphragm is welded to the flange base base; on the basis of the original flange It improves the outer diameter and corrosion resistance of the isolating diaphragm, and avoids the problems of unstable measurement results, large temperature drift and high repair rate of the pressure transmitter due to the small outer diameter and high rigidity of the isolating diaphragm.
Aluminum Electrolytic Capacitors/ Ceramic Capacitors
Aluminum Electrolytic Capacitors/ Ceramic Capacitors
Aluminum Electrolytic Capacitors,Electrolytic capacitor,Ceramic Capacitor
YANGZHOU POSITIONING TECH CO., LTD. , https://www.pst-thyristor.com