KR20000000070U - External Magnetic Block Structure of Dry Water Meter Magnet - Google Patents

Abstract

The present invention relates to a water meter, in particular, in a dry water meter in which the guide rotational force is transmitted by a magnet, a protective cap is formed on the outer circumference of the magnet so that the magnetic force of the magnet is not changed by the magnetic force outside the water meter. It relates to the structure of external magnetic force blocking of a magnet, and puts a magnet protective cap on the outer circumference of the driven magnet, and forms a lead layer on the outer circumferential surface thereof, so that the external magnetic force is blocked without affecting the driven magnet, thereby reducing the rotational force of the driving magnet. It is related to the external magnetic shield structure of the dry water meter magnet which minimizes the error of the totalizer because it is transmitted accurately.

Description

External Magnetic Block Structure of Dry Water Meter Magnet

The present invention relates to a water meter, in particular, in a dry water meter in which the guide rotational force is transmitted by a magnet, a protective cap is formed on the outer circumference of the magnet so that the magnetic force of the magnet is not changed by the magnetic force outside the water meter. It relates to an external magnetic shield structure of a magnet.

Water meters for metering tap water use are classified into dry and wet depending on the configuration in which the rotation of the axle is finally transferred to the counter.

The dry meter is composed of a separate space without water in the guide part because the rotation is transmitted by the opposing magnet in the state in which the blade shaft and the guide shaft are separated. Therefore, excessive rotational transmission is blocked and there is no fear of failure, and the direction of the guide part is easy to set. However, when the flow rate is large flow rate, the driven shaft is driven so that it does not follow the rotation of the driving shaft. There is a problem that the integration of the flow rate is lost.

In addition, the wet meter is composed of the same space with the axle shaft and the shaft of the guide portion connected by a plurality of gear transmission and the water is introduced into the guide portion. Therefore, it is possible to accumulate the exact flow rate, and there is an advantage that there is no loss of the flow rate accumulation due to the rotation by the direct connection of the axle shaft and the guide shaft even in the passage of a large flow rate, while the assembly is cumbersome due to the increase of parts such as the connecting gear There is a problem that the manufacturing cost is increased, and if the foreign matter caught in the gear, the rotational force of the vane is not buffered and the rotational force is transmitted as it is, which may cause damage.

However, the conventional dry water meter has a problem in that the magnet of the driving or driven component constructed or installed therein is not subjected to the rotational force by the external magnetic force or the iron piece, or does not rotate. In other words, if the magnet is located outside the main body of the water meter or if the magnet with stronger magnetic force lines is located, there is no rotation loss due to the generation of load even if the driving magnet rotates due to the rotation of the blade and the driven magnet affects the external magnetic lines. There is a problem that sometimes stops receiving.

The present invention solves the problems as described above, and the magnet protection cap is put on the outer circumference of the driven magnet, but a lead layer is formed on the outer circumferential surface of the protection cap so that external magnetic force does not affect the driven magnet. It is an object of the present invention to provide an external magnetic force blocking structure of a dry water meter to minimize the error of the totalizer because it accurately transmits the rotational force of the driving magnet.

1 is an overall cross-sectional view of the present invention

2 is an explanatory view of the main section of the present invention;

<Explanation of symbols for the main parts of the drawings>

1: inlet pipe 2: outlet pipe

3: body 4: wing

5: driving magnet 6: meter reading

7: driven magnet 8: protective cap

9: shaft insertion hole 10: internal space

12: axle 13: accumulator

14 Guideline 15 Lead layer

Hereinafter, embodiments of the present invention will be described in detail by the accompanying drawings.

1 is an overall cross-sectional view of the present invention.

The vane 4 is formed in the center of the water meter main body 3 in which the inflow pipe 1 and the discharge pipe 2 were formed, and the disk-shaped drive magnet 5 was built in the upper part, and the meter reading part 6 of the upper part was constructed. ), The driven magnet 7 is spaced apart from each other at a position opposite to the aforementioned drive magnet 5.

At this time, the protective cap (8) is put on the outer periphery of the driven magnet (7), the protective cap (8) forms a lead layer (15) on the outer peripheral surface, the shaft insertion hole (9) is formed in the center of the magnet (7) An internal space 10 for inboarding is formed.

In the drawings, reference numeral 12 denotes an axle shaft, 13 an accumulator, and 14 a guide.

Hereinafter, the operation of the present invention in more detail as follows.

As the fluid introduced into the inlet pipe 1 is discharged to the discharge pipe 2, the blade wheel 4 rotates according to the flow of the fluid, and the blade shaft 8 rotates.

Therefore, the rotational force transmitted from the blade axle 12 by the rotation of the vane 4 is transmitted to the driving magnet 5, the rotation occurs, the driven magnet 7 is the movement of the magnetic force line of the driving magnet 5 The accumulator 13 and the guide 14 which interlock with the driven magnet 7 rotate while performing the rotation along the direction.

At this time, when there is an approach of a magnet that forms iron or a strong magnetic force line from the outside, the driven magnet 7 will move in accordance with the movement of the external magnet which forms a stronger magnetic force line than the driving magnet 5, and then the blade wheel (4). Even if the rotation occurs, there will be no movement of the accumulator 13 and the guide 14 due to the driven magnet 7 load or stop. Therefore, when the external magnetic force line affects the driven magnet 7 by the blocking structure of the present invention, a part of the magnetic force line is blocked by the lead layer 15 of the protective cap 8 of the present invention, and the part is diffused to the outer body 3. It will act as a shield.

Therefore, the problem that the indication value of the accumulator 13 generate | occur | produces by the external magnetic force, or the accumulator 13 itself stops is solved.

As described above, the present design puts the magnet protective cap of the synthetic resin on the outer circumference of the driven magnet so that the external magnetic force does not affect the driven magnet, thereby accurately transmitting the rotational force of the driving magnet, thereby minimizing the error of the totalizer.

Claims (1)

The vane 4 is formed in the center of the water meter main body 3 in which the inflow pipe 1 and the discharge pipe 2 were formed, and the disk-shaped drive magnet 5 was built in the upper part, and the meter reading part 6 of the upper part was constructed. ) Is a dry water meter in which a driven magnet 7 is spaced apart at a position opposite to the electric drive magnet 5, A protective cap 8 is formed on an outer circumference of the driven magnet 7, but the protective cap 8 forms a lead layer 15 on the outer circumferential surface thereof, and an axial insertion hole 9 is formed in the center of the magnet 7. External magnetic shield structure of the dry water meter, characterized in that the inner space 10 is formed.