JP2001165724A - Permanent magnet type flowmeter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structurally simple and durable product arbitrarily set in its attaching direction and improved in its use environment as compared with a conventional product restricted in its attaching direction and use environment. SOLUTION: A permanent magnet type flowmeter is characterized by that the attraction force and repulsive force of magnets are applied and, since a flow rate detection valve and an indicator rotor are separated and the respective magnets are molded, the contamination of a fluid is eliminated and any non- magnetic processing material can be selected corresponding to a use.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an application of the attractive force of a permanent magnet. Conventional direct-reading type flow meters are of the float type and utilize the flow of a fluid and the weight of the float. The flow meter must be mounted vertically and the flow of the fluid is restricted from bottom to top. In addition, it must be made of a transparent material structurally, and it is difficult to see the scale with a deeply colored fluid, making it difficult to confirm. When the flow detection valve (3) of FIG. 1 moves in the opening direction due to the fluid, the magnet sealed inside the flow detection valve, (7) of FIG. 2 and the pointer rotor (2) of FIG. ), The pointer rotor is rotated by the attraction force of (6) in FIG. 2, and the flow rate is indicated in (1) of FIG.
The force acting in the closing direction of the flow detection valve generally uses a spring, but considering contact with fluid and durability, the repulsive force of the magnet shown in (5) in FIG. As shown in the figure, a seal was built in the front of the main body so as not to come into contact with the fluid. Also, if the rotation axis (4) of the flow rate detection valve and the rotation axis of the pointer rotor are not placed on the same track but in the positional relationship of (10) and (11) in FIG. The displacement angle of the pointer rotor (2) is 2 with respect to the displacement angle of the valve (1).
As a result, the reading accuracy of the hands was improved, the length of the hands was shortened, and the shape was reduced. The pointer rotor is weight-balanced to eliminate the influence of gravity.

[Brief description of the drawings]

FIG. 1 is a perspective view including a partial cross section of the present invention.

FIG. 2 shows the polarity and positional relationship of each magnet.

FIG. 3 is a front center sectional view taken along line A-A ′ of FIG. 1;

FIG. 4 is a diagram showing a relative displacement angle of a flow detection valve and a pointer rotor.

[Explanation of symbols]

1 is a pointer, 2 is a pointer rotor, 3 is a flow detection valve, 4 is a flow detection valve rotating shaft, 5 is a flow detection valve repulsion magnet, 6 is a pointer rotor magnet, 7 is a flow detection valve magnet, and 8 is a pointer. Rotor bearing Bearing, 9 is a pointer rotating shaft, 10 is a flow detection valve rotating shaft fulcrum, 11 is a pointer rotor shaft fulcrum, 12 is a trajectory of the flow detection valve, 13 is a trajectory of the pointer rotator, B is an inlet, C Is a discharge port, D is a flow detection valve displacement angle of 40 ° pointer displacement angle of 80 ° E is a flow detection valve displacement angle of 80 ° pointer displacement angle of 160 °

Claims (3)

[Claims] 1. A direct-reading type flow meter which incorporates a permanent magnet in a flow detecting valve and a pointer rotor and applies an attractive force of the magnet. 2. A repulsive force of a magnet is applied to a force required when the flow detection valve is closed. 3. When the position of the fulcrum of the pointer rotor is set at half the displacement angle of the flow detection valve, the displacement angle of the pointer rotor becomes twice the displacement angle of the flow detection valve.