JPH0641867B2 - Flow measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to, for example, a flow rate measuring device provided in the middle of a liquid delivery pipe.

[Conventional technology]

As shown in Japanese Patent Laid-Open No. 49-54059, the flow rate measuring device has an impeller shaft provided in the fluid flow pipe connected to an oscillator provided outside the pipe via a magnetic coupling, and the output of the oscillator is connected. Is displayed on the display.

In this case, a generator is separately provided to supply the electric power for driving the indicator, and the generator is rotated by the flow energy of the fluid in the fluid flow pipe, and the generator is combined with the oscillator to generate electricity. Others connect the machine shaft to the oscillator shaft and the impeller shaft to the oscillator shaft via a magnetic coupling.

[Problems to be solved by the invention]

As described above, the conventional one connects the generator to the transmitter connected to the impeller via the magnetic coupling. The generator has a permanent magnet fixed to the shaft and a coil for power generation. Therefore, magnets are required for the generator part and the magnetic coupling part, respectively. As a result, not only the number of parts is increased, but also the device is enlarged. Therefore, as seen in, for example, Japanese Patent Laid-Open No. 56-79213, one of the rotating magnetic couplings is connected to the armature of a small DC generator, and the storage battery is charged with the exciting current generated by the rotation. There are also those that use a magnetic coupling magnet to generate electricity.

However, in the one disclosed in Japanese Patent Laid-Open No. 56-79213, the generator is provided separately from the magnetic coupling, so that it cannot be made sufficiently compact.

An object of the present invention is to solve the above-mentioned disadvantages of the conventional example, reduce the number of permanent magnets incorporated as parts, and further integrate a magnetic coupling and a generator to provide an inexpensive and compact flow rate measuring device. It is in.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a flow measuring device in which a flow pulse transmitter is connected to a flow meter via a magnetic coupling and the output of the transmitter is displayed on a display, and an output located on the side surface of the flow meter main body. A female part of a magnetic coupling having a ring-shaped permanent magnet on its shaft, a partition wall which is watertightly attached to the side wall of the flowmeter body and has a recessed portion located inside the ring-shaped permanent magnet, and a partition wall provided inside the recessed portion. A power generating coil, a male part of the magnetic coupling to which a permanent magnet is attached at a space inside the power generating coil, and a rotary shaft having the male part of the magnetic coupling at one end and the slit plate at the other end, A flow pulse generator with a sensor that detects the rotation of the slit plate, a rectifier that converts the alternating current generated by the generator coil into a direct current, a battery that stores electric power, and a flow pulse counting counter. And a display device for displaying the flow rate, and the power generated from the generator coil is stored in a battery via a rectifier, and the sensor for the flow pulse transmitter, the control device, and the display device are driven from the battery. The gist is to supply electric power to the department.

[Action]

According to the present invention, the power generation coil is integrally incorporated between the female part and the male part of the magnetic coupling that couples the flow meter and the flow pulse generator. It can be used as a permanent magnet of a generator, the number of built-in permanent magnets is reduced, and the entire device becomes compact. Then, the indicator and the control device are driven by using the electric power generated by this generator.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory view showing an embodiment of a flow rate measuring device of the present invention,
FIG. 2 is a vertical sectional side view of a joint portion, which is a main portion of the same as above.
Indicates a flow meter main body having a rotor 1a, the end of the output shaft 2 of the flow meter main body 1 is projected outside the case from a hole 3 provided in the side wall 1b of the flow meter case, and the female end of the magnetic coupling is attached to this projected end. Part 4 is provided.

The female part 4 of the magnetic coupling is one in which four permanent magnets 5a, 5b, 5c and 5d are attached to the inner peripheral wall of a bowl-shaped support 4a, and these four permanent magnets 5a to 5d are shown in FIG. As shown in, the outside, which is the side in contact with the inner wall, is the N pole or S
The poles and the inside are S poles or N poles, and adjacent poles are arranged so that the NS poles are opposite to each other.

Reference numeral 6 in the drawing denotes a flow rate pulse transmitter, in which a rotatable slit plate 7 is made to face a sensor 8 composed of, for example, a light emitter and a light receiver, and a rotary shaft 9 of the slit plate 7 is provided. Of the magnetic coupling is provided at the protruding end, and the male portion 10 of the magnetic coupling is provided at the protruding end.

As shown in FIG. 2, the male part 10 of the magnetic coupling has four permanent magnets 11a, 11b, 11c and 11d which are adjacent to each other in the same manner as the female part 4 so that the NS poles thereof are opposite to each other. Arranged.

Then, a partition wall 12 having a recess 12a at substantially the center is attached to the side wall 1b of the flowmeter body 1 in a watertight manner via a packing 13, and the partition wall 12 partitions the female portion 4 and the male portion 10 of the magnetic coupling into the recess 12a. Position the male part 10 of the magnetic coupling therein. In this case, the N pole or S pole on the permanent magnets 5a to 5b side and the S pole or N pole on the permanent magnets 11a to 11b side are opposed to each other so that both magnets are attracted to each other, and the inner peripheral wall of the recess 12a is Mount the four power generation coils 14.

In this state, the power-generating coil 14 is arranged between the permanent magnets 5a to 5d of the female portion 4 of the magnetic coupling and the permanent magnets 11a to 11d of the male portion 10 of the magnetic coupling. The coil 14 and the permanent magnets 5a to 5d and 11a to 11d constitute a generator 15. The flow rate pulse signal from the sensor 8 of the flow rate pulse transmitter 6 was introduced into the control device 18 using a micro computer or the like, and the output signal from the control device 18 was introduced into the flow rate indicator 19 and the like. Further, the generator 15 is connected to the battery 17 via the rectifier 16 and is supplied to the power control device 18 of the battery 17, the indicator 19 and other power-off units.

Next, the operation will be described. When a fluid flows in the flowmeter main body 1, the rotor 1a is rotated thereby, and the output shaft 2 thereof is rotated.
Rotates, and the permanent magnets 5a to 5d also rotate via the support 4a attached thereto.

As a result, the permanent magnets 11a to 11d also rotate, and this rotation is transmitted to the slit plate 7 via the rotation shaft 9, and the slit plate 7 rotates to cut off the optical line at the sensor 8 portion. As a result, the sensor 8 detects the rotation of the rotating shaft 9, that is, the output shaft 2, and outputs it as a flow rate pulse signal to the control unit 18. The control unit 18 counts the flow rate pulse signal and displays it as a flow rate on a display unit 19 It is output to and displayed here, and the flow rate is transmitted to a remote place via a signal line 20.

On the other hand, since the power-generating coil 14 is located between the permanent magnets 5a to 5d and the permanent magnets 11a to 11d, the lines of magnetic force are generated by the rotation of the permanent magnets 5a to 5d and 11a to 11d. It will cross 14 and as a result, power will be generated here.

The generated electric power is converted from alternating current to direct current by the rectifier 16 and stored in the battery 17, and is used as a drive source for the sensor 8, the control device 18, the indicator 19, and the like.

Since the outside of the side wall 1b is covered with the partition wall 12, it is not necessary to interpose a seal member between the hole 3 provided in the side wall 1b of the flowmeter body 1 and the output shaft 2, and the frictional resistance here is small. The rotation of the output shaft 2 is smoothly transmitted to the permanent magnets 5a to 5d.

Although the power generation coil 14 is disposed between the permanent magnets 5a to 5d and 11a to 11d of the magnetic coupling in the above-described embodiment, the power generation coil 14 is not necessarily limited to the above-described power generation coil 14. As a second embodiment, as shown in FIG. 3, a flat coil 21 having a small thickness (for example, a printed coil) may be used in place of the power generation coil 14, and in this case, the permanent magnets 5a to 5a of the magnetic coupling. 5d and 11a-11d
Since the distance between and is shorter than that in the case of using the power generation coil 14, the conduction efficiency of the magnetic coupling is improved.

〔The invention's effect〕

As described above, the flow rate measuring device of the present invention utilizes the magnet of the magnetic coupling that couples the flow meter and the flow rate pulse transmitter as the permanent magnet of the generator, and also the female part and the male part of the magnetic coupling. Since the power generation coil is integrally incorporated between the two, the number of permanent magnets can be reduced, the manufacturing cost can be reduced, and the entire device can be made compact.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a first embodiment of a flow rate measuring device of the present invention, FIG. 2 is a vertical sectional side view of a joint part which is a main part of the same, and FIG.
The drawing is a vertical cross-sectional side view of an essential part of the second embodiment. 1 ... Flowmeter main body, 1a ... Rotor 1b ... Side wall, 2 ... Output shaft 3 ... Hole, 4 ... Female part of magnetic coupling 4a ... Support 5a, 5b, 5c, 5d ... Permanent Magnet 6 …… Flow pulse generator 6a …… Transmitter case, 7 …… Slit plate 8 …… Sensor, 9 …… Rotating shaft 10 …… Male part of magnetic coupling 11a, 11b, 11c, 11d …… Permanent magnet 12 ... Partition, 12a ... Recess 13 ... Packing, 14 ... Power generation coil 15 ... Generator, 16 ... Rectifier 17 ... Battery, 18 ... Control device 19 ... Indicator, 20 ... Signal Wire 21 ... Flat coil

Claims (1)

[Claims] 1. A flow measuring device in which a flow pulse transmitter is connected to a flow meter via a magnetic coupling, and the output of the transmitter is displayed on a display meter. A female portion of the magnetic coupling provided with a permanent magnet, a partition wall that is watertightly attached to the side wall of the flowmeter main body, and has a concave portion located inside the ring-shaped permanent magnet,
A power generating coil provided in the recess, a male part of the magnetic coupling having a permanent magnet attached inside the power generating coil with a space, and a male part of the magnetic coupling at one end and a slit plate at the other end. A rotating shaft, a flow rate pulse oscillator having a sensor that detects the rotation of the slit plate, a rectifier that converts the alternating current generated by the generating coil into a direct current,
A battery for storing electric power, a control device for counting and calculating flow rate pulses, and an indicator for displaying the flow rate are provided, and the power generated from the generator coil is stored in the battery via a rectifier and the flow rate pulse is transmitted from the battery. Sensor of the vessel,
A flow rate measuring device characterized in that electric power is supplied to a control device and a drive unit of an indicator.