Today, I will introduce a national invention authorized patent-a combined differential pressure transmitter. The patent was applied for by Chengdu Lanshi Cryogenic Technology Co., Ltd., and the authorization was announced on January 4, 2016.
Content descriptionThe utility model relates to the technical field of transmitters, in particular to a combined differential pressure transmitter.
Background of the inventionThe differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter; the measured result is the pressure difference. The difference between the differential pressure transmitter and the general pressure transmitter is that they have 2 pressure ports. , Differential pressure transmitter is generally divided into positive pressure end and negative pressure end. Under normal circumstances, the pressure of the positive pressure end of the differential pressure transmitter should be greater than the pressure of the negative pressure section before it can be measured; the pressure difference between the positive and negative ends of the measuring medium is converted into The standard current signal that can reflect the pressure difference. The pressure difference is transmitted through the differential pressure sensor connected between the high-pressure end and the low-pressure end to obtain the pressure difference between the air inlets at both ends. The existing differential pressure transmitter The structure of the differential pressure transmitter is relatively complicated, and the accuracy cannot be guaranteed during the processing of the differential pressure transmitter, which affects the installation accuracy of the differential pressure transmitter and is not conducive to the installation of the differential pressure transmitter; on the other hand, the existing differential pressure Most of the transmitters use a cylindrical support structure, which has a low degree of force and is prone to deformation.
Summary of the inventionThe purpose of the utility model is to provide a combined differential pressure transmitter to achieve the purpose of low processing difficulty, high processing accuracy and improving production efficiency of the differential pressure transmitter, and solve the structure of the existing differential pressure transmitter It is more complicated, difficult to process, and low in installation accuracy.
In order to achieve the purpose of the utility model, the technical solution adopted is: a combined differential pressure transmitter, which is characterized in that it includes component A, component B, and component C. The component A, component B, and component C can be assembled into A rectangular transmitter body; a differential pressure measurement chamber A is opened on the side wall of the component A, and the differential pressure measurement chamber A is connected with a low pressure port; the side wall of the component B is provided with a differential pressure measurement chamber A Matching differential pressure measurement chamber B, the top of the component B is provided with a pressure measurement chamber, and the bottom is provided with a high-pressure port; the differential pressure measurement chamber B, the pressure measurement chamber and the high-pressure port communicate with each other; the side of the component C is opened There is a signal processing chamber.
Further, the side wall of the component B is provided with an annular notch concentric with the open end of the differential pressure measuring chamber B, and a sealing ring is arranged in the annular notch. A differential pressure sensor is sealed in the differential pressure measurement cavity A; a pressure sensor is sealed in the pressure measurement cavity. The assembly A is provided with a through-wire hole, and the through-wire hole corresponds to the side wall of the differential pressure sensor. The top of the component C is also provided with a signal connector hole, and the signal connector hole communicates with the signal processing cavity. Threaded connection holes are provided on the mutually assembled side surfaces of the component A, the component B and the component C.
The adoption of the utility model has the following advantages: this application adopts a mutual combination to form a differential pressure transmitter, which has the advantages of simpler structure, convenient and quick installation, and saving factory processing costs and processing difficulties compared with traditional transmitters; this application The structural design and the sealing ring are arranged in the cavity. When each component is connected and fixed by bolts, it has better sealing performance, and has a more reliable guarantee for the accurate measurement of the pressure difference; the differential pressure transmitter of this application is compared with The traditional structure, because its various components are rectangular, it is convenient for the factory to process accurately and quickly, and it is also conducive to the accurate positioning of the differential pressure transmitter during installation, which saves processing costs and improves production efficiency.
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