JPS589355Y2 - Remote indication and measurement device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a remote indicating and measuring device used, for example, in a water meter.

FIG. 1 is an electrical wiring diagram showing a conventional remote indication and measurement device.

FIGS. 2 and 3 are explanatory diagrams of the operation of a conventional remote instruction and measurement device.

Corresponding parts in the figure are designated by corresponding reference numerals.

The same applies to the following drawings.

In FIG. 1, the originating switch device 1 includes a first . The second switch 2.3 rotates depending on the amount of water in a water meter, for example. and a cam 4 which alternately closes the second switch 2.3.

The receiving device 5 has the first. A DC power supply 7 connected to one terminal of each of the second switches 2.3 via a first electrical path 6a, an electric motor 8 connected in series to the DC power supply 7, and a first A first switching contact 9a connected to the other terminal of the switch 2 via a second electric path 6b.
and a second switching contact 9b connected to the other terminal of the second switch 3 via a third electric path 6c, and a counter for counting the number of times the receiving switch 9 is switched. It is composed of a device 10.

Next, this operation will be explained using FIGS. 2 and 3.

When the first switch 2 is closed as shown in FIG.
A closed circuit of DC power supply 7 → electric motor 8 → receiving switch 9 → first switching contact 9a → second electric path 6b → first switch 2 → first electric path 6a → DC power source 7 is formed, and electric motor 8 rotates. do.

When the electric motor 8 rotates, the counting device 10 is advanced by l steps, and the receiving switch 9 is connected to the second switching contact 9b as indicated by the dotted line in FIG.

The energization from the DC power source 7 is cut off to this dead motor 8, and the motor 8 stops.

When the cam 4 continues to rotate further, the first switch 2 opens, and then the second switch 3 closes, and as shown in FIG. Contact 9b → third electric path 6c → second switch 3 → first
A closed circuit from the electric path 6a to the DC power source 7 is formed, and the electric motor 8 rotates again to advance the counting device 10 by one step, and the receiving switch 9 is connected to the first switching contact 9a.

When the remote indicating and measuring device is used in a water meter as described above, the cam 4 operates according to the amount of water supplied to the water meter.
is the first. The second switch 2.3 is alternately closed and the first switch 2.3 is closed alternately.
Each time the second switch 2.3 closes alternately, the electric motor 8 and the receiving switch 9 are operated in conjunction with each other, and the counting device 1
It is configured to display the weighing value at 0.

In such a conventional remote indication and measurement device, for example, as shown in FIG. 3, when the first switch 2 is welded to a fixed terminal and the second switch 3 is closed by a cam 4,
The reception switch 9 is the first. A closed circuit is formed no matter which of the second switching contacts 9a and 9b is connected, and the electric motor 8 and the counting device 10 do not operate normally.

If this state lasts for a long time, not only will the counted value of the counting device 10 become incorrect, but the electric motor 8 and the rotating parts of the counting device 10, for example, will be seize up, eventually becoming unusable, and the DC power source 7 will be exhausted. I put it away.

This idea was made in view of the conventional drawbacks.

This idea will be explained below with reference to the drawings.

FIG. 4 is an electrical wiring diagram showing an embodiment of the remote instruction and measurement device according to this invention.

5 to 7 are explanatory diagrams of the operation of this invention.

In FIG. 4, each component and the operation of each component are almost the same as the remote indicating and measuring device shown in FIG. This is the point connected in series to 6a.

That is, as shown in FIG. 4, when the switch 2 of the transmitting switch device 1 is closed by the cam 4, the DC power source 7 of the receiving device 5 → the electric motor 8 → the receiving switch 9 → the first switching fluid.
Point 9a → second electric path 6b → first switch 2 → first electric path 6a → parallel circuit 13 → form a closed circuit of DC power supply T,
The electric motor 8 is rotated to switch the receiving switch 9 to the second switching contact 9b and move the counting device 10 forward by one step.

The capacitor 11 discharges the accumulated charge through the discharge resistor 12 in preparation for the next energization.

If the transmitting device 1 is normal, the cam 4 is activated as shown in FIG.
When rotates, the first. There is a period in which both the second switches 2 and 3 are open, but if the first switch 2 is welded to the terminal, the cam 4 causes the second switch 3 to close. Then, the first. Second switch 2.3
are closed together.

In this case, the current is DC power supply T → motor 8 → reception switch 9 → second switching contact 9b → third electric line 6c → second switch 3 → first electric line 6a → parallel circuit 13 → DC power supply 7 closed. The circuit rotates the electric motor 8 to switch the receiving switch 9 to the first switching contact 9a as shown by the dotted line in FIG. 6, and at the same time causes the counting device 10 to advance by one step.

When the receiving switch 9 contacts the first changeover contact 9a, the first switch 2 of the transmitting switch device 1 remains closed and the capacitor 11 turns on the motor 8 for a period of time to advance the counting device 10 by two steps. It is designed to be charged with electric charge for driving.

Therefore, the motor 80 circuit remains closed.

Therefore, since the current continues to flow through the motor 8, the counting device 10
, and the receiving switch 8 is switched to the second switching contact 9b again.
Switch to connect.

Even if the second switch 3 of the transmitting switch device 1 remains closed, the charge in the capacitor 11 is saturated, so the current flows from the DC power source 7 to the motor 8 to the receiving switch 9 to the second switch. Switching contact 9b → third electric path 6c → second switch 3 → first electric path 6a → discharge resistor 12 → DC power supply 7
flows through a closed circuit.

In this process, the value of the current flowing through the discharge resistor 12 is
The electric motor 8 is stopped and the counting device 10 does not advance.

Next, when the cam 4 rotates to the state shown in FIG. 7, the charge stored in the capacitor 11 is discharged through the discharge resistor 12 in preparation for the next energization.

Further, the parallel circuit 13 is connected in series to the first electric line 6a within the first electric line 6a, but this is connected between the DC power supply 7 and the electric motor 8, between the electric motor 8 and the reception switch 9, or between the It goes without saying that the parallel circuit 13 may be connected between the electric circuit 6a of the electric motor 1 and the DC power source 7, and these are collectively referred to as the parallel circuit 13 connected in series to the electric motor 8.

As described above, according to this invention, the first
．． If the second switch is tripped or one is permanently closed, if the other switch is normal, the counting device is incremented by two steps only when the other switch is closed.
Reliability can be dramatically improved without disturbing the overall count value.

[Brief explanation of drawings]

FIG. 1 is an electrical wiring diagram showing a conventional remote indication and measurement device. FIGS. 2 and 3 are explanatory diagrams of the operation of a conventional remote instruction and measurement device. FIG. 4 is an electrical wiring diagram showing an embodiment of the remote instruction and measurement device according to this invention. 5 to 7 are explanatory views of the operation of the remote instruction and measurement device according to this invention. In the figure, 1 is a transmission switch device, 2 and 3 are first . A second switch, 5, is a receiving device, 6a, 6b. 6c is the first. Second. 3rd electric path, 8 is a motor, 9 is a reception switch, a switching contact, 9b is a 2nd switching contact, 11 is a capacitor, 12 is a resistor. 7 is a DC power supply, 9a is the first switch 10 is a counting device, 13 is a parallel circuit

Claims (1)

[Scope of utility model registration request] The first part opens and closes alternately according to changes in the amount to be measured of the object to be measured.
and a second switch, a DC power supply connected to one terminal of each of the first switch and the second switch, and a motor connected in series to the DC power supply, a first switching contact connected to the other terminal of the first switch; and a second switching contact connected to the other terminal of the second switch; 11 a receiving device having a receiving switch switchably connected to a second switching contact and a counting device counting the number of times the receiving switch is switched;
and a parallel circuit of a capacitor and a discharge resistor connected in series to the motor is provided, and the capacitor capacity is increased twice or more.
A remote instruction and measurement device characterized in that the value is set equal to the amount of electricity that is operated less than 10 times.