Bottom fixing device of contact type liquid level sensor and fixing method using the device

Abstract

The invention relates to a bottom end fixing device of a contact liquid level sensor and a fixing method using the bottom end fixing device. The bottom end fixing device comprises an outer sleeve, a heavy hammer rod and a permanent magnet; the top end of the outer sleeve is provided with a nut for being fixed with the bottom end of the contact liquid level sensor; the upper part of the heavy hammer rod is positioned in the outer sleeve; the bottom end of the heavy hammer rod is connected with the permanent magnet. The outer sleeve and the bottom end of the contact liquid level sensor are fixed by the nut at the top end of the outer sleeve, so the connection and fixation between the bottom end fixing device of the contact liquid level sensor and the contact liquid level sensor are realized; the contact liquid level sensor and the bottom end fixing device of the contact liquid level sensor which are connected together are fixedly placed in a container and are attracted to the bottom of the container by the permanent magnet at the bottom end fixing device of the liquid level sensor, thus realizing the fixing of the bottom end of the contact liquid level sensor.

Description

technical field [0001] The invention relates to a bottom fixing device of a contact type liquid level sensor and a fixing method using the device. Background technique [0002] In the prior art, there are two types of contact liquid level sensors: a hard rod type and a flexible cable type. In order to ensure the normal operation and measurement accuracy of the sensor, it must be ensured that the sensor is perpendicular to the measured liquid level during use. Therefore, the hard rod type liquid level sensor is installed on the top of the container vertically through the flange or other methods, while the flexible cable type liquid level sensor After the sensor is installed on the top of the container, in order to ensure that the sensor is perpendicular to the liquid surface, a heavy hammer is installed at the bottom of the flexible cable sensor, and the cable is straightened to be vertical to the liquid surface by gravity. In practical applications, the liquid level of the ...

AI Technical Summary

Problems solved by technology

In practical applications, the liquid level of the storage container can only rise and fall, the liquid level is relatively calm, and the sensor can work normally. Moreover, the lateral flow is also very large, especially for taller vertical containers. Because the sensor is long, when the sensor is affected by the lateral flow, the rigid rod sensor has a long sensor and limited strength, and the sensor will swing and tilt due to the influence of the lateral flow. Affected by the strong and weak uneven lateral flow, the flexible cable sensor will swing around in the container, thus affecting the normal operation and measurement accuracy of the sensor

If the sensor is a float type, due to the large volume of the floating ball, it has a large resistance to the liquid flow and is more affected by the lateral flow. The sensor tilts and swings in the container and appears inclined and bent. The magnetic floating ball cannot freely move up and down along the sensor with the change of the liquid level. floating, so that the sensor does not work properly

The traditional way to solve this problem is to install a bottom anchor at the bottom of the sensor, and fix the bottom of the sensor on the bottom of the container to ensure that the sensor is not affected by the lateral flow and achieve the purpose of normal operation of the sensor. The disadvantages of this fixing method are as follows: : When the sensor is installed, the installer must enter the container and install and fix the bottom anchor on the bottom of the container. When the sensor is repaired or replaced, the operator also needs to enter the container and untie the bottom anchor and the container bottom fixing device to pull out the sensor. repair

For example, when the sensor is repaired, verified or replaced, there is liquid material in the container, and the liquid must be drained and the tank cleared before the operator can enter the container. It is laborious and time-consuming, and it also adversely affects the normal production and scientific research order

Images