JPH081453Y2 - Transmitter of automatic power generation water meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a transmitter of an automatic power generation type water meter having an improved power generation mechanism.

(Prior Art) An automatic power generation type water meter is known as a remote meter that does not require an external power source. This automatic power generation type water meter is configured as shown in FIGS. That is, 1 is an impeller-type water meter main body, and this water meter main body 1 is provided with an inflow port 2 and an outflow port 3. An impeller 4 is provided inside the water meter main body 1, and the rotating shaft 5 is interlocked with one magnetic joint 9 of a magnet coupling 8 via a reduction gear group 7 constituting a flow rate measuring unit 6. In addition, the indicator of the water meter main body 1
It is linked to 10.

The indicator unit 10 of the water meter main body 1 is equipped with a cylindrical transmitter unit case 11 which constitutes a transmitter.
Inside the 11 is provided the other magnetic coupling 12 of the magnet coupling 8. The rotation of the magnetic coupling 12 is interlocked with the intermittent rapid feed mechanism 14 via a reduction gear group 13 which constitutes a transmission mechanism. Furthermore, the intermittent fast-forward mechanism 14 is the power generation mechanism 15
Is linked to. The intermittent rapid feed mechanism 14 is composed of a cam, a lock mechanism 16 and a mainspring 17, and when the cam rotates and fits at one position of the lock gear, the mainspring 17 is rotated.
The energy stored in the power generator 15 instantaneously rotates the power generation mechanism 15 to generate a voltage.

The power generation mechanism 15 is configured as shown in FIG. That is, reference numeral 21 denotes a cylindrical magnet as a rotor, which is rotatably provided inside the transmitting unit case 11 in an upright position and has a rotating shaft 21 of the magnet 21.
a is linked to the output section of the intermittent fast-forward mechanism 14. The magnet 21 has N poles and S poles symmetrically arranged about the axis. An iron core 22 is provided adjacent to the magnet 21 in a state orthogonal to the magnet 21, that is, in the lateral direction. The iron core 22 is inserted into a bobbin 23, and an electromagnetic coil 24 is wound around the bobbin 23. At one end of the iron core 22 is a first
Core 25 and a second core 26 at the other end thereof. The first and second cores 25, 26 are provided with arcuate portions 25a, 26a facing the north pole and the south pole of the magnet 21, respectively. Has been.

Then, as shown in FIG. 8, when the magnet 21 is stationary, it attracts the first and second cores 25 and 26, and the iron core 22 of the first core 25 has the N pole and the second core 26. S for the iron core 22
Magnetized to poles. When the magnet 21 is made to make a half rotation from this state by the intermittent rapid feed mechanism 14, the polarities of the magnetizations of the first core 25 and the second core 26 are reversed, and an induced electromotive force is generated in the electromagnetic coil 24. , To a receiver (not shown).

Therefore, the impeller 4 is rotated by the tap water flowing from the inlet body 2 of the water meter main body 1, and the number of rotations is transmitted to the reduction gear group 13 and the intermittent rapid feed mechanism 14 via the magnetic coupling 8 to further generate power. Interlocks with mechanism 15.
When the magnet 21 of the power generation mechanism 15 is stationary, the first,
The magnets are attracted to the second cores 25 and 26, but when the magnet 21 makes a half rotation by the intermittent rapid feed mechanism 14 for each unit flow rate, the polarities of the magnetizations of the first core 25 and the second core 26 change to the opposite directions, and the electromagnetic waves change. An induced electromotive force is generated in the coil 24 and is transmitted to a receiver (not shown) at a remote place.

(Problems to be solved by the invention) However, the transmitter of the automatic power generation type water meter configured as described above has the first and second magnets facing each other across the magnet 21.
The core 25 and the second core 26 are symmetrical. Therefore,
If the height of the magnet 21 is increased and the mainspring 17 is not strengthened, the specified voltage (9V) does not occur as shown by the solid curve in FIG. However, if the height of the magnet 21 is increased, the receiving device becomes vertically long, the entire automatic power generation water meter equipped with the transmitting device becomes large, and there is a problem that the installation place is restricted. Further, if the mainspring 17 is made stronger, the driving torque is increased and the performance of the water meter is deteriorated. Therefore, if the height dimension of the magnet 21 is reduced in order to avoid increasing the size of the water meter, only a voltage of about 3 V is generated as shown by the broken line curve in FIG.

To increase the voltage with the magnet 21 having a small height, insert the magnet 21 between the first core 25 and the second core 26, and then forcibly rotate the magnet 21 to the right to repel it. Stop in the state. When the magnet 21 is rotated in this state, the rotation speed of the magnet 21 increases, and as shown in FIG. 10, the generation of voltage increases. However, there is a problem that the reverse voltages a and b are generated and two or three pulses are generated, and a normal pulse cannot be transmitted.

The present invention was made in view of the above circumstances, and its purpose is to increase the size of a magnet as a rotor constituting a power generation mechanism and to strengthen a mainspring without increasing a specified voltage. It is an object of the present invention to provide a transmitter of an automatic power generation type water meter, which is capable of generating electricity and can reduce the size of the power generation type water meter.

[Structure of the Invention] (Means and Actions for Solving the Problem) In order to achieve the above-mentioned object, the present invention interlocks the power generation mechanism with the transmission mechanism to perform intermittent fast-forward rotation, and
A rotor having N poles and S poles symmetrically arranged about an axis, an iron core provided in a state orthogonal to the rotor next to the rotor, and an electromagnetic coil wound around the iron core; A pair of asymmetric members are provided extending from both ends of the iron core to face the N pole and the S pole along the outer peripheral surface of the rotor, and one of them is formed large to cover substantially half circumference of the rotor. Configure with the core.

With the above configuration, the stationary position of the rotor is shifted to one side, and when the rotor is rotated at this position, the rotation speed of the rotor is increased and the voltage is increased.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. However, the water meter has the same structure as the conventional one, and the description thereof will be omitted.

Reference numeral 30 shown in FIG. 1 is a transmitter provided inside the water meter main body 1. Reference numeral 31 is a transmitter case, which is composed of an upper case 31a having a cylindrical shape with a head and a lower case 31b having a cylindrical shape with a bottom. The peripheral wall of the upper case 31a is inserted inside the peripheral wall of the lower case 31b, and the transmitter case 31 is fitted into the opening 32 of the water meter body 1. A flange portion 31c provided on the outer peripheral wall of the upper case 31a is engaged with the edge portion 32a of the opening 32. Further, the flange portion 31c is the edge portion 3 of the water meter body 1.
The transmitter case 31 is fastened by a tightening ring 33 screwed to the 2a, and is detachably attached to the water meter main body 1.

A partition plate 35 is provided in the middle of the transmitter case 31 approximately in the middle.
Is provided, and a bearing plate 36 is provided in the lower stage. A pin 37 protruding downward is provided at a substantially central portion of the partition plate 35, and a gear 38 is rotatably supported by the pin 37. A magnetic coupling 39 facing the substantially central portion of the bearing plate 36 is fixed to the gear 38 to form a magnet coupling 40. A reduction gear group 41, which constitutes a transmission mechanism rotatably supported between the partition plate 35 and the bearing plate 36, is interlocked with the gear 38, and the reduction gear group 41 is connected via a transmission shaft 42. Numeric wheel 43 as an indicating mechanism
Is linked to. The numeral wheel 43 faces the indicator window 44 of the transmitter case 31.

The reduction gear group 41 is interlocked with a power generation mechanism 46 via an intermittent rapid feed mechanism 45 similar to the conventional one, and the power generation mechanism 46 is provided above the partition plate 35 and adjacent to the numeral wheel 43. There is.

The power generation mechanism 46 is configured as shown in FIGS. 2 and 3. That is, 47 is a cylindrical magnet as a rotor, which is rotatably provided inside the transmitter case 31 in an upright position, and this magnet
The rotary shaft 47a of 47 is interlocked with the output part of the intermittent rapid feed mechanism 45. The magnet 47 has N poles and S poles symmetrically arranged about the axis. Next to the magnet 47, an iron core 48 is provided in a state orthogonal to the magnet 47, that is, in the lateral direction. The iron core 48 is inserted into a bobbin 49, and an electromagnetic coil 50 is wound around the bobbin 49. A first core 51 is provided at one end of the iron core 48, and a second core 52 is provided at the other end. The first and second cores 51 and 52 face the north pole and the south pole of the magnet 47. The arcuate portions 51a and 52a are provided. Further, although the arcuate portion 51a of the first core 51 has the same shape as the conventional one, the arcuate portion 52a of the second core 52 has the same shape.
The large a is formed so as to cover substantially the half circumference of the magnet 47, and the first core 51 and the second core 52 are formed asymmetrically.

By forming the first core 51 and the second core 52 asymmetrically, the stationary position of the magnet 47 is shifted to the right.
When the magnet 47 is rotated at this position, the rotation speed of the magnet 47 is increased and a large voltage is generated as shown in FIG. That is, as in the conventional case, the magnet 47 attracts the first and second cores 51 and 52 in a stationary state,
The core 48 of the first core 51 has an N pole, and the core 48 of the second core 52 has
Is magnetized to the S pole, but unlike the conventional magnet
No reverse voltage is generated because 47 is not rotated in a repulsive state. Further, by making the second core 52 larger than the first core 51, the rotation torque of the magnet 47 is 2/3 that of the conventional one.
And the rotation speed of the magnet 47 further increases.
When the magnet 47 makes a half rotation by the intermittent rapid feeding mechanism 45 from the state where the first and second cores 51 and 52 are attracted to each other, the polarities of the magnetizations of the first core 52 and the second core 52 change to the opposite directions, and the electromagnetic coil Induced electromotive force is generated in 50 and is transmitted to a receiving unit (not shown).

Therefore, the impeller 4 is rotated by the tap water that has flowed in from the inlet body 2 of the water meter body 1, and the number of rotations is transmitted to the gear 38 via the magnet coupling 40.
The rotation of the gear 38 is transmitted to a numeral wheel 43 as an instruction mechanism via a reduction gear group 41 to indicate the flow rate. The reduction gear group
41 is linked to the power generation mechanism 46 via the intermittent rapid feed mechanism 45, and the magnet 47 of the power generation mechanism 46 is attracted to the first and second cores 51 and 52 when the magnet 47 is stationary. When the magnet 47 is rotated half a turn by the intermittent rapid feed mechanism 45, the polarities of the magnetizations of the first core 51 and the second core 52 are reversed, and an induced electromotive force is generated in the electromagnetic coil 50. Not).

The transmitting device 30 configured as described above includes a magnet 47 and an iron core that constitute the power generation mechanism 46 inside the transmitting unit case 31.
Since the electromagnetic coil 50 including 48 is provided laterally adjacent to each other, the transmitter case 31 can be housed inside the water meter main body 1 and the overall configuration can be downsized.

In the shaft support, the cylindrical magnet 47 was used as the rotor, but any magnet having different poles symmetrically provided may be used, and a rod magnet may be supported rotatably in a horizontal plane. Good.

[Effects of the Invention] As described above, according to the present invention, the power generation mechanism is rotated in an intermittent fast-forward manner in conjunction with the transmission mechanism, and the rotor is provided with the N pole and the S pole symmetrically about the axis. , An iron core provided in a state orthogonal to the rotor on the side adjacent to the rotor, an electromagnetic coil wound around the iron core, and extending from both ends of the iron core along the outer peripheral surface of the rotor. N pole and S
It is characterized in that it is composed of a pair of cores that are asymmetrical and that face each other, and that one of them is formed large so as to cover substantially half circumference of the rotor. Therefore, it is possible to reduce the size of the magnet as the rotor that constitutes the power generation mechanism, and it is possible to generate a prescribed voltage without strengthening the mainspring. Furthermore, the height dimension of the power generation type water meter can be made smaller than before, there is no restriction on the installation location, the rotating torque of the rotor is small, the starting flow rate is small, and the performance of the water meter is improved. There is.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a vertical side view of an automatic power generation type water meter, FIG. 2 is a cross sectional plan view of a power generation mechanism, and FIG. 3 is a power generation mechanism. Vertical side view of
FIG. 4 is a graph of generated voltage, FIG. 5 is a front view of a conventional automatic power generation type water meter, FIG. 6 is a plan view of the same, FIG. 7 is a perspective view of a flow rate measuring unit and a transmitting unit, and FIG. FIG. 3 is a cross-sectional plan view and a vertical side view of a conventional power generation mechanism, and FIGS. 9 and 10 are graphs of conventional generated voltage. 1 ... Water meter main body, 30 ... Transmitter, 31 ... Transmitter case, 46 ... Power generation mechanism, 47 ... Magnet (rotor), 48 ... Iron core, 50 ... Electromagnetic coil, 51, 52 ... …core.

Claims (1)

[Scope of utility model registration request] 1. A water meter main body is provided with a transmitter case having a power transmission mechanism and a power generation mechanism for transmitting power from a flow rate measurement unit via a magnetic coupling, and the power generation mechanism is interlocked with the power transmission mechanism. In addition to intermittent fast-forward rotation, a rotor having N-pole and S-pole symmetrically arranged about the shaft center, an iron core provided next to the rotor in a state orthogonal to the rotor, and wound around the iron core And an electromagnetic coil that extends from both ends of the iron core and faces the N pole and the S pole along the outer peripheral surface of the rotor, and one of them is formed to be large so as to cover substantially the half circumference of the rotor. And an asymmetrical pair of cores, and an automatic power generation type water meter transmitter.