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Differential pressure transmitter

A differential pressure transmitter and transmitter technology, applied in instruments, measuring fluid pressure, pressure difference measurement between multiple valves, etc., can solve the problem of pipe popping, ignoring pressure-sensitive diaphragm protection, and damaging pressure-sensitive film Chips and other problems to avoid impact damage, protect internal electronic components, and improve service life

Inactive Publication Date: 2019-12-20
XIAN HUAHENG INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current differential pressure transmitters on the market often ignore the protection of the pressure-sensitive diaphragm. If the pipeline is not kept smooth during use, the sediment in the pipeline will pop up and damage the pressure-sensitive diaphragm.

Method used

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Embodiment approach

[0022] As a preferred embodiment of the present invention, the section of the annular waterproof plug 18 is concave.

[0023] As a preferred embodiment of the present invention, the bolt holes 13 on the connecting plate 8 are arranged symmetrically with respect to the pipe interface 8 .

[0024] As a preferred embodiment of the present invention, there is a gap between the water-permeable protective plate 17 and the pressure-sensitive membrane 11 , and the two are equal in size and shape.

[0025] In this differential pressure transmitter, a water-permeable protective plate is set outside the pressure-sensitive diaphragm, which avoids the impact and damage of the pressure-sensitive diaphragm by the pop-up of pipeline sediments, and improves its service life. The leakage of liquid in the chamber affects the measurement results, while keeping the inside of the transmitter housing dry and protecting its internal electronic components.

[0026] Compared with patents 201710745634....

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Abstract

The invention discloses a differential pressure transmitter. The differential pressure transmitter comprises a transmitter shell, a circuit board, a signal output terminal, a display screen and a pressure sensing diaphragm, wherein the signal output terminal is arranged on the right side of the top end of the transmitter shell; the display screen is arranged on the front face of the transmitter shell; a protection ring body is arranged on the outer side of the display screen; and the circuit board is further arranged in the transmitter shell. According to the differential pressure transmitter,a water permeable protection plate is arranged on the outer side of the pressure sensing diaphragm, so that impact damage to the pressure sensing diaphragm caused by pipeline sediment ejection is avoided, so that the service life is prolonged, meanwhile, an annular waterproof plug is arranged, liquid leakage in a pressure sensing cavity is effectively avoided, the measurement result is influenced, meanwhile, the interior of the transmitter shell is kept dry, the internal electronic components of the transmitter shell are protected, a connecting assembly is rotationally connected with the transmitter shell through a rotating shaft, the orientation of the display screen can be freely adjusted, and the display screen is convenient for a user to observe.

Description

technical field [0001] The invention relates to the technical field of transmitters, in particular to a differential pressure transmitter. Background technique [0002] The differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter and outputs a standard signal. The difference between the differential pressure transmitter and the general pressure transmitter is that they all have two pressure ports. The transmitter is generally divided into a positive pressure end and a negative pressure end. In general, the pressure of the positive pressure end of the differential pressure transmitter should be greater than the pressure of the negative pressure section to measure. The differential pressure transmitter is used to measure the liquid level of liquid, gas and steam. , density and pressure, and then convert it into a current signal output. [0003] The current differential pressure transmitters on the market ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L13/02G01L19/06
CPCG01L13/025G01L19/0609G01L19/0654
Inventor 刘亚青
Owner XIAN HUAHENG INSTR CO LTD
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