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There is no limit to creativity, and the instrument is invented. Today we introduce a national invention patent for authorization - intelligent pressure transmitter. The patent was applied by Chongqing Silian Measurement and Control Technology Co., Ltd. and was authorized to be announced on March 15, 2017.
Description
The invention relates to the field of instruments, instruments and industrial automation, and in particular to an intelligent pressure transmitter.
Background of the invention
A transmitter is a transducer that converts the output signal of a sensor into a signal that can be recognized by the controller (or a signal source that converts the non-electricity of the sensor input into an electrical signal while amplifying it for remote measurement and control). There are many types of transmitters. The transmitters used on industrial control instruments mainly include temperature transmitters, pressure transmitters, flow transmitters, current transmitters, voltage transmitters, etc. Measure pressure, differential pressure, vacuum, level, flow and density. The transmitter uses an isolating member with an isolating diaphragm that will be mounted 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 the signal is converted via the transmitter and output.
However, the traditional DN25 flange type intelligent pressure transmitter has a nominal size of DN25 for its mating flange, and its international common series pipe outer diameter is 33.7mm, which makes the pressure sensor's important pressure element isolation 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 influence on the performance of the pressure transmitter. Due to the small diaphragm and high rigidity, the DN25 flange type intelligent pressure change in practical application. The transmitter performance is unstable, the temperature drift is large, and the repair rate is extremely high.
Summary of the invention
In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an intelligent pressure transmitter for solving the problem that the pressure transmitter isolation diaphragm has small outer diameter, high rigidity and unstable measured pressure value. The problem of high temperature drift and high repair rate.
The figure shows the structure of the installation of the first embodiment of the intelligent pressure transmitter provided by the utility model.
To achieve the above and other related objects, the present invention provides an intelligent pressure transmitter comprising: a pressure transmitter body, a flange base and an isolating diaphragm, the flange base being disposed on the pressure transmitter body Below, the isolating diaphragm is mounted to the bottom of the flange base, and the isolating diaphragm has a nominal diameter of 50 mm.
Preferably, the isolating diaphragm is made of 316L or Hastelloy C. The sealing surface is further welded to the bottom of the flange base by argon arc welding, and the isolating diaphragm is embedded between the sealing surface and the flange base. The sealing surface has a nominal diameter of 25 mm. The sealing surface on the flange base is mounted on the mating flange by a gasket. The material of the isolating diaphragm is tantalum or monel. The isolation diaphragm is welded to the bottom of the flange base. The flange base is mounted to the mating flange by a transition ring. The material of the transition ring is polytetrafluoroethylene.
As described above, the intelligent pressure transmitter of the present invention has the following beneficial effects: by separating the isolation diaphragm of the conventional DN25 flange type intelligent pressure transmitter from the built-in to the external connection, using the isolation of 316L or Hastelloy C material. a diaphragm, the isolation diaphragm is embedded between the sealing surface and the flange base; or an isolation diaphragm made of tantalum or Monel is used to weld the isolation diaphragm to the base of the flange base; In addition, the outer diameter and corrosion resistance of the isolation diaphragm are improved, and the problem that the pressure transmitter has small outer diameter, high rigidity, unstable measurement results, large temperature drift and high repair rate is avoided.
Description
The invention relates to the field of instruments, instruments and industrial automation, and in particular to an intelligent pressure transmitter.
Background of the invention
A transmitter is a transducer that converts the output signal of a sensor into a signal that can be recognized by the controller (or a signal source that converts the non-electricity of the sensor input into an electrical signal while amplifying it for remote measurement and control). There are many types of transmitters. The transmitters used on industrial control instruments mainly include temperature transmitters, pressure transmitters, flow transmitters, current transmitters, voltage transmitters, etc. Measure pressure, differential pressure, vacuum, level, flow and density. The transmitter uses an isolating member with an isolating diaphragm that will be mounted 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 the signal is converted via the transmitter and output.
However, the traditional DN25 flange type intelligent pressure transmitter has a nominal size of DN25 for its mating flange, and its international common series pipe outer diameter is 33.7mm, which makes the pressure sensor's important pressure element isolation 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 influence on the performance of the pressure transmitter. Due to the small diaphragm and high rigidity, the DN25 flange type intelligent pressure change in practical application. The transmitter performance is unstable, the temperature drift is large, and the repair rate is extremely high.
Summary of the invention
In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an intelligent pressure transmitter for solving the problem that the pressure transmitter isolation diaphragm has small outer diameter, high rigidity and unstable measured pressure value. The problem of high temperature drift and high repair rate.
The figure shows the structure of the installation of the first embodiment of the intelligent pressure transmitter provided by the utility model.
To achieve the above and other related objects, the present invention provides an intelligent pressure transmitter comprising: a pressure transmitter body, a flange base and an isolating diaphragm, the flange base being disposed on the pressure transmitter body Below, the isolating diaphragm is mounted to the bottom of the flange base, and the isolating diaphragm has a nominal diameter of 50 mm.
Preferably, the isolating diaphragm is made of 316L or Hastelloy C. The sealing surface is further welded to the bottom of the flange base by argon arc welding, and the isolating diaphragm is embedded between the sealing surface and the flange base. The sealing surface has a nominal diameter of 25 mm. The sealing surface on the flange base is mounted on the mating flange by a gasket. The material of the isolating diaphragm is tantalum or monel. The isolation diaphragm is welded to the bottom of the flange base. The flange base is mounted to the mating flange by a transition ring. The material of the transition ring is polytetrafluoroethylene.
As described above, the intelligent pressure transmitter of the present invention has the following beneficial effects: by separating the isolation diaphragm of the conventional DN25 flange type intelligent pressure transmitter from the built-in to the external connection, using the isolation of 316L or Hastelloy C material. a diaphragm, the isolation diaphragm is embedded between the sealing surface and the flange base; or an isolation diaphragm made of tantalum or Monel is used to weld the isolation diaphragm to the base of the flange base; In addition, the outer diameter and corrosion resistance of the isolation diaphragm are improved, and the problem that the pressure transmitter has small outer diameter, high rigidity, unstable measurement results, large temperature drift and high repair rate is avoided.
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