Rotating shaft magnetic coupling type inner float ball level gauge

Abstract

The invention relates to a rotating shaft magnetic coupling type inner float ball level gauge, which comprises a float ball (1), a ball rod (2), a ball rod sleeve (3), a rotating shaft (4), a connecting flange (5), a shaft sleeve (6), a connecting frame (7) and a transmitter (8). The rotating shaft magnetic coupling type inner float ball level gauge is characterized in that an inner magnetic rotor (40) installed on the end of the rotating shaft (4) and an outer magnetic rotor (80) installed on the end of an input shaft of the transmitter rotate in a magnetic coupling type, an isolating sleeve (9) arranged between the inner magnetic rotor (40) and the outer magnetic rotor (80) and an end flange of the shaft sleeve (6) are connected in a sealed and fixed mode. The rotating shaft (4) has flexible rotation and the rotating shaft magnetic coupling type inner float ball level gauge has good sealing performance, good use reliability and good safety and is convenient to install.

Description

technical field [0001] The invention relates to a liquid level transmitter, especially used for liquid level measurement of flammable, explosive and corrosive media and transmission of liquid level signals. Background technique [0002] The prior art internal float liquid level gauge includes a float, a ball rod, a ball rod sleeve, a rotating shaft, a connecting flange, a sealing shaft sleeve, a sealing gland, a connecting frame, a counterweight, and a transmitter. When the liquid level of the liquid level gauge rises or falls, the floating ball moves up and down to drive the ball rod to swing up / down, the ball rod drives the rotating shaft to rotate, and the rotating shaft drives the input shaft of the transmitter to rotate. The sealing of the rotating shaft of the internal float level gauge is achieved by arranging a flexible graphite filler or winding packing between the sealing shaft sleeve and the rotating shaft, and pressing it with a sealing gland. The disadvantage i...

AI Technical Summary

Problems solved by technology

The disadvantage is that the sealing is not good and unreliable. After the graphite packing or packing is pressed with the sealing gland, it is necessary to ensure the axial sealing and at the same time ensure the normal rotation of the rotating shaft. It is very difficult to grasp and easily cause rotation. The shaft is 'locked', causing the rotating shaft to fail to work normally. If the graphite packing or packing is not tight enough to the rotating shaft, the sealing will not be good, resulting in the leakage of the medium liquid, resulting in a safety accident; the installation success rate is low , and time-consuming

In addition, even if it is assembled during production, when the temperature of the medium used is high, due to thermal expansion, the graphite filler or packing will be "locked" to the rotating shaft, so that the rotating shaft cannot rotate normally, causing accidents

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