Float-type liquidometer with vernier display function

Abstract

The invention relates to a float-type liquidometer with the vernier display function. The float-type liquidometer comprises a float chamber, a float inside the float chamber, a vernier outside the float chamber, a guide rail and a dividing rule. The vernier is a piece of disc-shaped or cylindrical magnetic steel, the axis of the vernier is parallel to the ground, and the magnetic poles of the vernier are located in the direction of the central axis. Under the magnetic action between the floater and the vernier, the circumferential surface of the vernier makes rolling contact with the outer wall of the float chamber. The guide rail comprises two parallel tracks perpendicular to the ground. The tracks are oppositely arranged on the outer sides of the two axial end faces of the vernier and attached to the end faces of the vernier so that the vernier can roll up and down along the outer wall of the float chamber between the tracks under the magnetic action. The float-type liquidometer with the vernier display function is further provided with a closed vernier chamber adjacent to the float chamber. The liquidometer has the advantages of being simple in structure, reliable to use, convenient to maintain, low in manufacturing cost and wide in application range.

Description

technical field [0001] The invention relates to liquid level measuring equipment, in particular to a float type liquid level gauge displayed by a vernier. Background technique [0002] Existing on-the-spot indicating liquid level instruments include glass plate type, magnetic flap (column) type, buoy type, two-color water level gauge, etc. The glass plate type can only be visually inspected at close range, and it is difficult to visually inspect after being covered with dust or contaminated by media, and the pressure resistance is limited. The magnetic flap (column) structure is relatively complex and prone to garbled characters. In addition, there is also the problem of high temperature demagnetization, which affects its service life and measurement accuracy. For example: Although the imported magnetic float level gauge is resistant to high temperature, after 4 to 5 years of use, the float has to be replaced due to the demagnetization of the magnetic steel in the float. T...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. The float is a sliding friction, and its disadvantages are also the same as above

2. The arrangement of magnetic steel in the entire circle of the float increases the weight of the float, which will inevitably increase the volume of the float

3. The demagnetization temperature of the magnetic steel limits the service temperature of the liquid level gauge

In addition, the existence of the shaft, connecting rod and weight on the vernier has the following problems: first, the weight of the vernier is increased; second, the mechanical friction is increased, which affects the accuracy; Four parts are too many, which affects the reliability of use

[0012] The applicant has also applied for "Float Type Liquid Level Gauge Displayed by Vernier or Buoy" (Patent No. ZL201420640215.5), which has linear bearings, linear bearings and linear guides, and inevitably has the following problems: 1. The weight of the vernier is increased; the second is to increase the mechanical friction, the friction of the linear bearing is greater than that of the usual rolling bearing, the increase of the weight of the vernier requires a greater magnetic force to couple, which further increases the mechanical friction, and then affects the accuracy. It has been proved by human experiments that the hysteresis is 3mm and the hysteresis is 3mm; the third is that the cost is greatly increased. The price of the linear guide is expensive, and the imported one is more than 200 yuan per meter. Several fixing parts are also needed between the chambers, which also further increases the cost

[0013] The mechanical friction of all the above-mentioned liquid level gauges is relatively large, and the applicant has been verified by experiments

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