High-pressure isolation device for pressure transmitter

Abstract

A high-pressure isolation device for a pressure transmitter comprises a sealed box body, wherein one side of the box body is provided with a detection channel communicated with a container to be detected and the other side thereof is provided with a pressure transmitter connector. The high-pressure isolation device is characterized in that a column is arranged in the sealed box body; the upper end of the column is hinged with a seal cover lever; one end of the seal cover lever is provided with a seal cover matched with the calibre of the detection channel and the other end thereof is connected with a pull rod; and the pull rod is connected with an outside drive mechanism by passing through a bottom board of the sealed box body. The device has the following beneficial effects: the device can isolate the pressure transmitter from the inside of a dust catcher during reverse flow dust cleaning inside the dust catcher to realize protection of the pressure transmitter, and a cylinder drivesthe pull rod to move to seal the detection channel when the measured data of the pressure transmitter show that reverse flow dust cleaning is required in the dust catcher, thus realizing isolation ofthe pressure transmitter from the dust catcher.

Description

technical field [0001] The invention relates to a protection device for a pressure transmitter, in particular to a high-pressure isolation device for a pressure transmitter. Background technique [0002] A pressure transmitter in the general sense is mainly composed of three parts: a load cell sensor (also called a pressure sensor), a measurement circuit, and a process connection. It can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.), to supply secondary instruments such as indicating alarms, recorders, regulators, etc. for measurement and indication and process regulation. [0003] Generally, a negative pressure transmitter is installed on the box-type filter bag dust collector to measure the pressure inside the dust collector to judge the dust accumulation of the filter bag of this type of dust collector and determine whether back-blowing is required. However, most of...

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Problems solved by technology

[0003] Generally, a negative pressure transmitter is installed on the box-type filter bag dust collector to measure the pressure inside the dust collector to judge the dust accumulation of the filter bag of this type of dust collector, and determine whether back-blowing is required. However, most of the existing negative pressure transmitters are directly connected to the dust collector without protection measures. Due to the limited pressure resistance of the negative pressure transmitter, it is easy to be hit by the high pressure of the back blowing during the process of back blowing and dust removal. wear, causing damage to the negative pressure transmitter

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