JPS61152995A - Feed water equipment - Google Patents

Abstract

PURPOSE:To prevent a motor from burning, by providing a water flow detector, fault time switching means and a disconnecting means and driving, when one pump causes a fault, the other pump while disconnecting a power supply for the both pumps when water can not be fed due to a freeze or the like in a pipe line. CONSTITUTION:A device, supplying water in a water receiving tank 1 to a water supplying tank 2 by a feed water pump 4, 5, provides a water flow detector 6 in a pipe line. When the pump 4 is in generation of a trouble, the device, disconnecting a power supply for the pump 4 via a timer because of no action in the water flow detector 6, operates the pump 5. While the device, when water can not be fed due to a freeze or the like in the pipe line, disconnects the power supply for the both pumps by a disconnecting means. Consequently, the device prevents a suspension fault of water supply in a building while enables a motor to be prevented from a burning failure even for occurrence of the situation with water unable to be fed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a water supply system installed in a building, and particularly to a water supply device suitable for an unmanned water supply system.

[Background of the invention]

Generally, water is supplied inside buildings such as high-rise buildings by installing a water tank on the ground or underground, or by installing an elevated water tank (water tank) on the roof of the building, and using a water pump (water pump) to transfer water from the water tank to the elevated water tank. This is done by supplying water to the elevated water tank and guiding the water from this elevated water tank to each floor. Starting and stopping of the water pump is controlled by a signal output from a water level detector provided in the elevated water tank. In recent years, as buildings have become taller, aquariums have also become larger, and it has become uneconomical to install elevated aquariums on rooftops. - Since a sufficient water head difference cannot be obtained on floors, pressurized water storage type water tanks are used.

By the way, in the above-mentioned water supply system, if the water pump breaks down or the pipes from the water receiving tank to the elevated water tank freeze, water cannot be sent to the elevated water tank, resulting in a water outage inside the building. Furthermore, even if the water pump is operating normally, if the pipeline freezes, an accident has occurred in which the drive motor of the water pump burns out.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide a water supply device that can prevent water outage due to pump failure and motor burnout due to freezing.

[Summary of the invention]

In order to achieve the above object, the present invention detects water flow in a pipe line from a water receiving tank to a water supply tank using a water flow detector.
c. When two water pumps are provided and the water flow is not detected by the water flow detector in a state where the power supply is connected to the -10,000 water pumps.

If the power supply connected to the water pump in question is disconnected and the power supply is connected to the other water pump, and no water flow is detected by the water flow detector even in this state, the power supply connected to the other water pump is disconnected. The feature is that the power source can also be disconnected.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 is a circuit diagram of a water supply device according to an embodiment of the present invention. Before explaining the configuration of this circuit, the outline of the water supply system will be explained with reference to FIG. 2. In FIG. 2, 1 is a water tank, 2 is a water tank, and 3 is a water level detector for detecting the water level of the water tank 2. In FIG. 4.5 is a water pump that supplies water from the water tank 1 to the water supply tank 2, and both are connected in parallel so that they are driven alternately (alternate driving will be described later).
.

A water flow detector 6 is installed in a pipe between the water pump 4.5 and the water tank 2, and outputs a signal when a water flow exceeding a predetermined amount is detected. 7 is a check valve. In such a water supply system, when the water level in the water tank 2 reaches a predetermined low water level (drought state), the water level detector 3 detects this and outputs a signal to drive one of the water pumps 4.5. When the water level in the water tank 2 reaches a predetermined high water level (full state), the water level detector 3 detects this and outputs a signal to stop the water pump in operation. do. In this way, the water level in the water tank 2 is always maintained within a certain range, and is set at 5 so that there is no problem with the water supply inside the building.

Now, returning to FIG. 1, the circuit configuration will be explained. P,
N indicates both positive and negative poles of the power supply. 8 is an alternating relay;
The switch operates only when the energized state changes to the de-energized state, and does not operate in other cases. Alternate relay 8 is contact 8
al, 881e gb,.

It has 8b2. 91. , 9 a is water level detector 3
Contact points 10b1, 10b of a relay (not shown) activated by a signal when a predetermined low water level is detected are water level detector 3
This is the contact point of a relay (not shown) that is activated by a signal when a predetermined high water level is detected. 11 a 1゜11a2.1l
b1. llb is an a contact and a b contact of a water flow relay (not shown) that is activated when the water flow detector 6 detects a water flow. 12 is a relay for the motor 16 that drives the water pump 4, and contacts 12 al, 12a, 1za3
has. Further, 13 is a motor 1 that drives the water pump 5.
7 relay, contacts 13 a 1 e 13 a
It has z e 13 a @.

Here, the motors 16 and 17 are each driven by a three-phase power supply, and contacts 12al and 13a are interposed in the circuit. 14 is a timer that operates after a predetermined period of time has elapsed after energization, and the contact 14 al.

14JI, 14b, , 14b, has the following. Reference numeral 15 indicates an alarm that operates in the event of an accident to notify the alarm, 18 and 19 indicate a holding relay that maintains the operation of the alarm 15, and 20 indicates a relay that opens the circuit of the alternating relay 8.

Holding relay 18 has contacts "8" 1 @ 18 a x
, the holding relay 19 has contacts 19a1, 19a2
The relays 20 each have a contact 20b.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG. First, normal operation will be explained. Now, the previous water supply is being carried out by the water supply pump 5,
It is assumed that the next water supply is performed by the water supply pump 4. In this case, each relay contact is in the state shown in FIG.

In this state, the water level detector 3 constantly monitors whether the water level in the water tank z is at a low level (step S1 shown in FIG. 3), and detects when the water level becomes low.

Activate the low water level relay and turn on contacts 9a□ and 9a2. When contact 9a is turned on, power supply P-relay 1
2-contact 8b, -contact 9J11-contact 10b, -contact 1
The circuit 4b1-power supply N is closed, the relay 12 is activated, and the contacts 12a□, 12a, 12a3 are turned on. By turning on the contact 12a3, the motor 16 is connected to the power source, and the water pump 4 is driven (step S, note that the third
In the figure, the water pump 4 is 24%, the water pump 5 is P,
Toshi [shown]. Therefore, water in the water tank 1 is supplied to the water tank 2. On the other hand, when the contact 12a1 is turned on, the alternate relay 8 becomes energized, but as described above, the alternate relay 8 does not operate. Further, when the contact 12a is turned on, the timer 14 starts timing operation.

During this time, the water flow detector 6 monitors whether there is a water flow above a certain level (Step S,), and the water level detector 3 monitors whether the water level is at a high level (Step 84).

When water is being fed normally to the water tank 2, the water flow detector 6 detects the presence of water flow and activates the water flow relay, turning on its contacts 11m, 11a2, and turning on the contacts 11b1.1.
1b, is turned off. Shortly thereafter, the set time of the timer ff14, which had previously started its timekeeping operation, has elapsed, and the timer 14 operates to turn on its contacts 14al, 14m, and turn off its contacts 14b1, 14b2. Contact 14
b□, 14b, are turned off, the contacts 11a1. l
Since la and are already on, relay 12
and the alternating relay 13 continues to be in the activated state.

In this state, when the water level in the water tank 2 becomes high due to the water supply, the water level detector 3 detects this and operates the high water level relay, turning off the contacts 10b1 and 10b2. When the contact 10b1 is turned off, the relay 120 circuit is opened and the relay 12 becomes a non-energized state nVc, thereby turning off the contacts 12a1, 12m2°12a1. Contact 1
2a, the motor 16 is cut off and the water pump 4 stops feeding water (step 8g). Also, the contact 12a
1 is turned off, the alternate relay 8 changes from the energized state to the non-energized state and operates, turning on the contacts 8a, 8a2 and turning off the contacts 8b, 8b. This contact 8a1
By turning on the water bottle, the next water supply will be activated.

The pump 5 is prepared to be driven, and the contact 8bl is turned off to ensure that the water pump 4 is stopped in the next water supply. That is,
The water pump 4 is disconnected from the power source, and the water pump 5 is switched to a state where it can be connected to the power source. [, the above contact 1
2,12 is turned off, the timer 14 becomes inactive and reset.

The circuit is alternate relay 8 contacts 9 a 1 e 8 a
! s8b1-8b, the other contacts are in the state shown in the figure.

In this state, the water level detector 3 monitors the water level in the water tank 2 (step S6), and when the water level becomes low, it activates the low water level relay to turn on contacts 9al and 9a2, and this time, contact 8a1 turns on. , so the power supply P-relay 1
3-Contact 8a1-Contact 9al-Contact 10b2-Contact 14
The b2-power supply N circuit is closed, and the relay 13 is activated to turn on its contacts taa, 13a, 13a.

By turning on the contact 13m1, the motor 17 is connected to the power source, the water pump 5 is driven (step Sr), and water supply to the water tank 2 is started. The subsequent operations are similar to those described above, so their explanation will be omitted. Thus, under normal conditions, steps 81-8. . is repeated and water tank 2
Water is supplied to the tank by alternate operation of water pumps 4 and 5.

Next, some kind of failure occurs in the motor or water pump, or a situation such as freezing of the pipe occurs, causing the water tank 2 to move from the water tank 1 to the water tank 2.
We will explain the operation during abnormal conditions when water cannot be supplied to the facility. First, if some kind of failure has occurred in the motor 16 or the water pump 4, and the motor 17 and the water pump 5 are in a normal state, step S1. Contacts 9a1 and 9a are once turned on by S2, and relay 12
is activated and its contact 12a□* 12a fig 1
213 is turned on, and thereby the alternate relay 8 is energized. However, since water is not supplied to the water tank 2, the water flow detector 6 does not detect water flow, and the contact 11
Ale'2 remains off, and contacts 11b, 1lb2 remain on. - 10,000, the contact 12a.

When turned on, the timer 14 starts timing operation.
After the set time, contacts 14al and 14a2 turn on, contact 1
4b1.14b, is turned off. As mentioned above, since the contact 11a1 remains off, when the contact 14b1 of the timer 14 turns off, the circuit of the relay 12 is opened.
The contact 12a is turned off, and the motor 16 and water pump 4 are turned off.
is disconnected from the power supply (hand N!LS11) and its use is discontinued.

- In the unlikely event that the voice alternating relay 8, which was once in the energized state, changes to the de-energized state as the set time of the timer 14 elapses while the contact 11a remains off and the contact 14b2 turns off.
As a result, contacts 8a1, 8a2 are turned on, contacts 8b□,
8b is turned off.

By the way, for a very short time after the timer 14 is activated and after that the alternate relay 8 is activated, the contact 8b1 of the alternate relay 8 is
, the contact 14a of the timer 14, and the contact 11b1 of the 71tEIJ relay are in the on state, so the holding relay 18
enters the operating state and maintains that operating state. The operation of the holding relay 18 turns on the contacts xsa1, 18a, and the turning on of the contact 18a1 activates the alarm 15, thereby reporting the failure of the motor 16 and water pump 4 (step 812).

When the contact 8a1 is turned on by the operation of the alternating relay 8, the power supply P - the relay 13 - the contact 8al - the contact 9a
The circuit 2-contact 10b2-contact 14b2-power supply N is closed, and the relay 13 is activated to close the contact 13a3 and drive the motor 17 and water pump 5 (procedure "SIS").

Therefore, the water supply from the water receiving tank 1 to the water supply tank 2 starts without any problem, and the water flow detector 6 detects the water flow (hand 1 [814
) Contact 11a1. lla, close, contact 1 l b,,
Close 1lb2. Hereinafter, when the water level detector 3 detects a high water level by the same operation as the previous operation (step 8ts
), stop the motor 17 and water pump 5 (step S□,
).

Thereafter, the operation returns to step 8 again, but if the alarm 15 is activated and the staff inspects the motor 16 and water pump 4 and repairs have been completed, the operation returns to step S□
~810 will be repeated. In addition, if the failure repair is not completed, the operation is from step S8~83% 81□~
Step S□6 is repeated, and during this time, water is exclusively supplied by the water pump 5. In addition, the motor 16 and the water pump 4
The operations (steps S1 to S8, 81g to 524) when the motor 17 and the water pump 5 are normal and the motor 17 and the water pump 5 are malfunctioning are also similar to the above operations, so the explanation thereof will be omitted.

Next, motor 16. water pump 4 and motor 17,
If both of the water pumps 5 are malfunctioning, of course no water flow will be detected in step S□4 or step S2□, so in the case of steps S and 4, relay 13 is activated with relay 12 cut off. In addition, in the case of step S2□, the relay 12 is cut off while the relay 13 is cut off.

As a result, the contacts 12a3 and 13a3 are all turned off, and the motor 16, water pump 4, and motor 17,
The water pump 5 is cut off from the power source (step 8181 step S3.). In this state, as is clear from the explanation given earlier, the holding relays 18 and 19 are both maintained in their operating state, and their contacts 1aa1 and 19a
When □ is turned on, the operation of the alarm 15 is maintained, and when the contacts 18a2 and 19a2 are turned on, the relay 20 is turned on.
is activated. When the relay 20 is activated, its contact 20b is turned off, so that the alternate relay 8 is maintained in an inactive state thereafter. By activating the alternating relay 8 at the same temperature and ℃, it is possible to avoid repeating the operation from step 818 to step S1 or from step 8213 to step S6.

Next, if water cannot be sent due to a cause other than the water pump 4.5, such as pipe freezing, the water flow detector 6 will not detect the water flow, so even if the water pump 4.5 is driven, the contact 11
a1* 11 a2 is not turned on. therefore,
The operation is exactly the same as the operation when both of the above-mentioned water pumps 4 and 5 are out of order.

In this way, in this embodiment, a water flow detector is provided to detect water flow, and its detection contact is inserted into a relay circuit, so that if one water pump fails, the other water pump is driven. This makes it possible to prevent water outage accidents within the building, and in the event of water supply being impossible due to frozen pipes, both water pumps are cut off from the power supply, preventing motor burnout. Accidents can be prevented.

Note that the water supply tank is not limited to an elevated water tank, but may be a pressurized water tank or any other type. or,
Although the above embodiments have been described using a relay circuit as an example, the present invention is not limited to a relay circuit, and may be configured using an electronic circuit or a microcomputer.

Furthermore, a display can be used in place of the alarm, or both can be used together.

〔Effect of the invention〕

As described above, the present invention is equipped with a water flow detector, an accident switching means, and a cutoff means, and when one water pump fails, the other water pump is driven. In the event of an emergency, the power to both water pumps is shut off, so even if one of the water pumps breaks down, water outages within the building can be prevented.
Further, even if a situation occurs in which water cannot be supplied, it is possible to prevent a motor burnout accident.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a water supply device according to an embodiment of the present invention, and FIG.
The figure is a system configuration diagram of a water supply system according to an embodiment of the present invention, and FIG. 3 is a flowchart explaining the operation of the circuit shown in FIG. WE1. 1...Water tank, 2...Water tank, 3...
...Water level detector, 4.5...Water pump,
6...Water flow detector, 8-------Alternate! J
Le-19a1* 9a2.10J*10b,...
...Detection contact of water level detector, lla□. 11a2.11b1.11b, . . . detection contact of water flow detector, 12. 13.Old...Relay, 14.Old.
・Timer, 15...9 report m, 16.17...
···heater. 18.19...Holding relay. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A water tank, and two water pumps that alternately operate to send water from the water tank to the water tank, and operate the two water pumps according to the water level in the water tank. In the water supply system to be controlled, a water flow detector detects water flow in a pipe line leading from the water receiving tank to the water supply tank, and when the power supply is connected to one of the two water pumps, the water flow is not detected by the water flow detector. an accident switching means for switching the other water pump to the power connected state; and when the water flow detector does not detect water flow in the power connected state of the other water pump by switching the accident switching means; A water supply device characterized in that it is provided with a cutoff means for setting a power supply connection state to a power supply cutoff state. 2. The water supply device according to claim 1, wherein the accident switching means includes an output means for outputting a failure signal.