Differential pressure indicator for controlling temperature by using liquid metal

Abstract

The invention discloses a differential pressure indicator for controlling the temperature by using liquid metal. The differential pressure indicator for controlling the temperature by using the liquid metal comprises a shell, wherein a filter oil inlet and a filter oil outlet are respectively formed in the middle lower part of the shell and the middle part of the lower end of the shell; a spring seat is fixedly arranged at the lower end of the shell; a lower spring is fixedly arranged at the upper part of the spring seat; a lower magnetic steel assembly is fixedly installed at the upper end of the lower spring; an upper cavity is formed in the shell; an upper magnetic steel assembly is arranged in the upper cavity; a nut is arranged at the upper end of the shell; and a transparent cover is arranged in the middle of the nut. According to the differential pressure indicator for controlling the temperature by using the liquid metal provided by the invention, different phase change temperatures are achieved by using different temperature memory alloys, so that the false alarm phenomenon is avoided; and in addition, different signaling temperatures such as 0 DEG C, 15 DEG C, 30 DEG C, 40 DEG C and the like can be obtained without adjustment by using different melting point characteristics of low-melting-point alloy metal, so that temperature control is facilitated, and time and labor are saved.

Description

technical field [0001] The invention relates to the field of differential pressure transmitters, in particular to a differential pressure transmitter which utilizes liquid metal to control temperature. Background technique [0002] The differential pressure transmitter is installed on the filter, and the upstream pressure and downstream pressure of the filter element are respectively connected. When no fluid flows through the filter, the lower magnetic steel assembly is close to the upper part of the housing under the pressure of the lower spring. [0003] Through the opposite sex attraction of the magnetic steel, the upper magnetic steel assembly overcomes the pressure of the upper spring and falls below the upper cavity of the annunciator. The outer circle of the upper magnetic steel assembly is red, and the red outer circle cannot be seen through the transparent cover at this time. round. Since the fluid flows through the filter element, there will be flow resistance, so...

AI Technical Summary

Problems solved by technology

However, the existing differential pressure transmitters often have the following problems during use: 1. The existing differential pressure transmitters are very prone to false alarms in low temperature environments, resulting in errors in sending alarms. 2. Now It is not easy to control the temperature with a differential pressure transmitter. The temperature needs to be given a large temperature range. The adjustment is inconvenient, time-consuming and laborious, and the scrap rate is high.

Images