JPH06257195A - Feed water supply system - Google Patents

Abstract

PURPOSE:To enable a water supply work for a tank to be performed automatically. CONSTITUTION:When a start switch 19 is turned on, a feed water supply system 1 opens an electromagnetic valve 17 and feeds water from a reservoir 11 to a water supply tank 3 on board a train through a main pipe 12a, a branch pipe 12b, a hose 59 and a valve mechanism 4. Also, a control circuit 25 obtains differential pressure between the upstream pressure and downstream pressure of an orifice 14, on the basis of detected signals from an upstream pressure sensor 15 and a downstream pressure sensor 16. Then, the circuit 25 judges that the water supply tank 3 is full of water and closes the electromagnetic valve 17, upon detecting a change in differential pressure for a full water condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device, and more particularly to a water supply device configured to automatically perform a water supply operation to a tank.

[0002]

2. Description of the Related Art For example, in a train such as a bullet train, a washroom is provided in each vehicle, and a clean water tank for supplying water in the washroom is provided below the train. The water in the clean water tank is replenished by the water supply device when the operation of the day ends and the vehicle returns to the garage.

As a water supply device of this type, a valve mechanism called a five-way valve, which is connected to a clean water tank provided in the lower part of a train, and a manual device which is arranged in a pipe line from a liquid storage tank of a garage, are generally used. Comprised of a type of on-off valve. When the train arrives at the garage, the worker connects the conduit from the liquid storage tank to the water supply side conduit of the valve mechanism arranged under the train with a hose. Then, the manual open / close valve is opened to start water supply. Therefore, the water in the liquid storage tank is pumped to the pump and supplied to the clean water tank of the train through the on-off valve, the hose, and the valve mechanism.

In the above valve mechanism, each valve inside operates by the supplied water pressure to supply water to the clean water tank,
The structure is such that the air in the clean water tank is exhausted to the outside, and when the clean water tank is full, the overflow water overflowing from the clean water tank is drained to the outside. After confirming that the overflow was drained from the valve mechanism, the operator judged that the water tank was full, and after closing the on-off valve,
The hose is removed and the water supply work is completed.

[0005]

However, in the above-mentioned conventional water supply device, the operator needs to confirm the overflow of water from the clean water tank and close the open / close valve, so that the operator monitors the vicinity. Not only can water supply be rationalized, but it also takes time to check the overflow from the valve mechanism when the water is full and to close the on-off valve. There is a problem that is. In addition, since each train car has a water tank, many workers will be assigned to fill all the water tanks, and one worker will need to use more than one water tank. If it is not possible to handle the tank and there are not enough workers, it will take a long time for the water supply work.

It is also conceivable to provide a full water detection sensor in the clean water tank and automatically close the on-off valve, but in that case, it must be provided in all clean water tanks of the train, which requires a lot of cost and time. It will be necessary and difficult to realize.

Therefore, an object of the present invention is to provide a water supply device which solves the above problems.

[0008]

The invention according to claim 1 is
A pipe line connected to the supplied water tank mechanism, a valve mechanism arranged in the pipe line for discharging overflow water overflowing from the tank when the tank of the supplied water tank mechanism is full, and the valve mechanism Solenoid valve disposed on the upstream side of the pipeline, pressure detection means provided on the upstream side pipeline for detecting the water supply pressure of the upstream side pipeline, and when the pressure detection means is full When a pressure change of is detected, it is determined that the tank is filled with water, the control means for closing the solenoid valve,
It is characterized by comprising.

Further, the invention of claim 2 is characterized in that the pipe line connected to the water supply tank mechanism and the overflow water overflowing from the tank when the tank of the water supply tank mechanism arranged in the pipe line is full. For discharging the gas to the outside, an electromagnetic valve arranged in the pipe line on the upstream side of the valve mechanism, and a flow rate provided in the pipe line on the upstream side for measuring the flow rate flowing in the pipe line on the upstream side. Flow rate measuring means, and when the flow rate measuring means detects that the tank capacity has been filled with water, control means for determining that the tank is full and closing the solenoid valve.
It is characterized by comprising.

Further, according to the invention of claim 3, the pipe line connected to the water supply tank mechanism and the overflow water overflowing from the tank when the tank of the water supply tank mechanism arranged in the pipe line is full. For discharging the water to the outside, an electromagnetic valve arranged in the pipeline on the upstream side of the valve mechanism, and a water supply pressure in the pipeline on the upstream side provided in the pipeline for the upstream side A pressure detecting means, a flow rate measuring means which is provided in the upstream side pipeline and measures a flow rate flowing through the upstream side pipeline, and when a pressure change at the time of full water is detected by the pressure detecting means, or When it is detected by the flow rate measuring means that the tank has been filled with water, it is determined that the inside of the tank is full, and the solenoid valve is closed.

According to a fourth aspect of the present invention, the flow rate measuring means is based on an orifice provided in the upstream conduit and a difference between a pressure on the upstream side of the orifice and a pressure on the downstream side of the orifice. And a flow rate calculating means for calculating the flow rate.

According to a fifth aspect of the invention, the control means is
After the water supply is started, the flow rate measuring means has an abnormality determining means for determining an abnormality when the flow rate is not measured.

Further, the invention of claim 6 is characterized in that the supplied water tank mechanism and the valve mechanism are arranged in a lower portion of the train.

[0014]

According to the present invention, when the pressure detecting means detects a pressure change when the tank is full, it is determined that the tank is full, and the electromagnetic valve is closed to fill the tank. The water supply can be stopped by automatically detecting this.

According to the second aspect of the present invention, when it is detected by the flow rate measuring means that the tank has been filled with water, the tank is filled with water by determining that the tank is full and closing the electromagnetic valve. Water supply can be stopped by automatically detecting that

According to the third aspect of the present invention, when the pressure detecting means detects a change in pressure when the tank is full, or when the flow rate measuring means detects that the tank volume has been filled with water, the tank becomes full. By determining that the tank is full and closing the solenoid valve, it is possible to automatically detect that the tank is full and stop the water supply.

According to the fourth aspect, the structure can be simplified by obtaining the flow rate based on the difference between the pressure on the upstream side of the orifice and the pressure on the downstream side of the orifice.

According to the fifth aspect, when it is determined that there is an abnormality when the flow rate is not measured by the flow rate measuring means,
You will be notified of an abnormality during water supply.

According to claim 6, the tank and the valve mechanism are
By arranging it at the bottom of the train, the water supply work to the train can be automated.

[0020]

1 to 3 show an embodiment of a water supply device according to the present invention.

In each of the drawings, the water supply system 1 is installed in a garage (not shown) or the like in which the vehicles 2 (2 ₁ , 2 ₂ , ..., 2 _n ) of the Shinkansen are housed. Therefore, when returning to the garage, water is supplied to the clean water tanks 3 (3 _{1 to} 3 _n ) provided at the lower portions of the vehicles 2 ₁ to 2 _n . Incidentally, for ease of description in FIG. 1, but clean water tank 3 it is shown in the vehicle 2 on an enlarged scale, actually provided under the floor of the vehicle 2 ₁ to 2 _n.

The vehicle 2 for the Shinkansen is an 8 to 16-car train, and a washroom (not shown) is provided for each of the vehicles 2 ₁ to 2 _n , and each washroom has a water supply device such as a water tap ( (Not shown).

The water supply system to the water supply device, one end of each vehicle 2 ₁ to 2 _n, that is, disposed near the vehicle connecting portion, clean water tank 3 mounted under the floor portion (3 ₁ to 3
The water in _n ) is supplied to the water supply equipment.
The water supply work to each clean water tank 3 (3 _{1 to} 3 _n ) is performed every time the train returns to the garage.

In addition, at the lower portion of each vehicle 2 ₁ to 2 _n , a valve mechanism 4 that performs a water supply operation during a water supply operation and discharges the overflow to the outside when the water is full, and an intake pipe 5 connected to the upstream side of the valve mechanism 4. , A tank water supply pipe 6 connecting the valve mechanism 4 and the clean water tank 3, a tank overflow pipe 7, a drain pipe 8 extending below the valve mechanism 4, and an air pipe 9 for supplying air to the valve mechanism 4. And are provided. Compressed air for pressurizing the water in the clean water tank 3 is supplied to the air pipe 9, and the pressure of the compressed air is set to 1 kgf / cm ² G in this embodiment.

The water supply device 1 comprises a plurality of water tanks 3 _{1 to} 3 _n.
A plurality of water supply units 10 (10 ₁ to 10 _n ) corresponding to the number of tanks are provided so that water supply work can be performed simultaneously. That is, the water supply units 10 ₁ to 10 _n are installed at predetermined intervals so as to face the stop positions of the vehicles 2 ₁ to 2 _n , in other words, the stop positions of the water tanks 3 _{1 to} 3 _n . .

Each of the water supply units 10 ₁ to 10 _n is connected in parallel via a water supply pipe 12 to a water storage tank 11 in which water is stored. The water supply pipe 12 is connected to the water storage tank 11 and is arranged in parallel with each of the vehicles 2 ₁ to 2 _n.
And each water supply unit 10 _1-
Branch pipe (upstream pipe line) 12b ₁ connected to 10 _n
12b _n . Further, a pump 13 for pumping the water in the water storage tank 11 is arranged in the main pipe 12a.

Since the water supply units 10 ₁ to 10 _n have the same structure, the first water supply unit 1 will be described below.
The configuration of 0 ₁ will be described.

As shown in FIG. 1, the water supply unit 10 ₁ is
An orifice 14 arranged in the branch pipe 12b ₁ , an upstream pressure sensor (pressure detecting means) 15 for detecting the upstream pressure P ₁ of the orifice 14, and a downstream side for detecting the downstream pressure P ₂ of the orifice 14. It comprises a pressure sensor 16, an electromagnetic valve 17 that opens when energized, and a control panel 18 to which the detection signal of the upstream pressure sensor 15 and the detection signal of the downstream pressure sensor 16 are supplied.

Further, the orifice 14, the upstream side pressure sensor 15 and the downstream side pressure sensor 16 constitute a differential pressure type flow rate detecting means. That is, when the orifice 14 is provided in the conduit through which the fluid flows, a pressure difference occurs before and after the orifice 14, and the magnitude of the pressure difference has a constant relationship with the flow rate. In this embodiment, a differential pressure type flow meter utilizing this principle is formed by the orifice 14, the upstream side pressure sensor 15 and the downstream side pressure sensor 16.

On the front surface of the control panel 18, a start switch 19 operated at the start of water supply, a stop switch 20 for stopping water supply, a reset switch 21 for resetting to an initial state, and a water supply indicator lamp 22 for indicating that water is being supplied. A power source display lamp 23 that indicates that the power source is on, an abnormality display lamp 24 that issues an alarm when water is not supplied during water supply, and the like are provided.

A control circuit 25 is housed in the control panel 18. The control circuit 25 has a table (not shown) in which data for converting a pressure difference before and after the orifice 14 into a flow rate is stored, and as described later, the upstream side pressure sensor 15 and the downstream side pressure sensor 16 are connected to each other. The pressure change and the flow rate at the time of water supply are monitored based on the detection signal of 1, and the solenoid valve 17 is closed when it is judged that the clean water tank 3 is full. Therefore, when the water level is full, the solenoid valve 17 is automatically closed by the control circuit 25, so that the operator does not need to monitor the overflow water near the valve mechanism 4 during the water supply operation. That is, the worker is required to take the intake pipe 5 and the branch pipe 12b connected to the valve mechanism 4.
₁ and the quick coupler 5 on both ends as shown in Fig. 1.
After connecting via a hose 59 with 8, control panel 18
Then, the start switch 19 is turned on to start the water supply operation for the next water supply unit 10. Therefore, one worker can take charge of a plurality of water supply units 10, and can perform water supply work efficiently.

Now, the structure of the valve mechanism 4 will be described.

As shown in FIG. 3, the valve mechanism 4 is supported by a U-shaped pipe seat 26 which holds the intake pipe 5, the tank water supply pipe 6, the tank overflow pipe 7, the drain pipe 8 and the air pipe 9. There is. In FIG. 3, the clean water tank 3 is located above the valve mechanism 4, but if the mounting position of the valve mechanism 4 is too low, the valve mechanism 4 will be damaged by the pebbles and the like, so Actually, as shown in FIG. 1, a valve mechanism 4 is arranged beside the clean water tank 3.

The valve mechanism 4 includes a water intake port 28 to which the water intake pipe 5 is connected to the valve body 27, a water supply port 29 to which the tank water supply pipe 6 is connected, and an overflow water inlet port 30 to which the tank overflow pipe 7 is connected.
And a drain port 31 to which the drain pipe 8 is connected and an air port 32 to which the air pipe 9 is connected.

As shown in FIG. 4, the valve body 27 includes a check valve 33, a discharge main valve 34, a discharge auxiliary valve 35, an air valve 36,
A piston 39 is provided which is displaced by the pressure difference between the drain valve 37 and the safety valve 38.

The check valve 33 is a valve for opening and closing an opening 42a of a valve seat 42 provided between a water intake chamber 40 having a water intake port 28 and a water supply chamber 41 having a water supply port 29.
The pressing force of 3 makes contact with the first valve seat 42, and the opening 42a
Close. Further, the check valve 33 receives water pressure when the water supply is started, and is opened apart from the valve seat 42.

The main discharge valve 34 and the auxiliary discharge valve 35 have a dual structure provided coaxially.
Opens and closes a through hole 34a that penetrates the discharge main valve 34 in the axial direction. Further, the main discharge valve 34 opens and closes an opening 46a of a second valve seat 46 that defines a drain chamber 45 and an overflow chamber 44 having an overflow inlet 30. The lower ends of the small diameter spring 47 and the large diameter spring 48 are in contact with the upper end of the discharge assisting valve 35, and the discharge assisting valve 35 is pressed in the direction of closing the through hole 34a by the combined force of the small diameter spring 47 and the large diameter spring 48. , Main discharge valve 34
Is a small-diameter spring 47 and a large-diameter spring 48 via the auxiliary discharge valve 35.
It is pressed in the direction to close the opening 46a of the valve seat 46 by the resultant force.

The air valve 36 defines an opening 50 in a third valve seat 50 which defines an overflow chamber 44 and an air chamber 49 having an air port 32.
Open and close a. The air valve 36 is supplied with compressed air from the air pipe 9 when the clean water tank 3 is filled with water, and is opened by this air pressure.

The air valve 36 is in contact with the upper ends of the small diameter spring 47 and the large diameter spring 48, and is pressed against the valve seat 50 by the combined force of the small diameter spring 47 and the large diameter spring 48. Therefore, the small-diameter spring 47 and the large-diameter spring 48 are connected to the discharge auxiliary valve 35.
And the air valve 36, and press both valves in opposite directions.

The drain valve 37 is a valve that opens and closes the drain port 51 provided at the bottom of the valve body 27.
The fourth valve seat 52 communicating with 1 is closed, and after the water supply is completed, the valve seat 52 is opened by the pressing force of the coil spring 53 to drain the water in the water intake chamber 40. The drain port 51 is connected to the drain pipe 8 via a drain pipe 54.

The safety valve 38 includes a flood chamber 44 and a drain chamber 45.
A valve that opens and closes an opening 56a of a fifth valve seat 56 provided in a flow passage 55 that communicates with the valve seat 56 and is normally pressed by the valve seat 56 by the pressing force of the coil spring 57 to close the opening 56a. The safety valve 38 is separated from the valve seat 56 when the pressure in the overflow chamber 44 is pressed upward by a force equal to or higher than a predetermined pressure (3 kgf / cm ² G in this embodiment), that is, a force equal to or higher than the pressing force of the coil spring 57. To open the opening 56a.

FIG. 5 shows an example of pressure change during water supply. In the figure, a solid line is a graph showing changes in the upstream pressure P ₁ detected by the upstream pressure sensor 15 that detects the upstream pressure P ₁ , and broken lines are detected by the upstream pressure P ₁ and the downstream pressure sensor 16. is a graph showing changes in the differential pressure P ₁ -P ₂ between the downstream pressure P ₂ which is.

Water supply is started at T ₁ and full at T ₂ . When the clean water tank 3 becomes full, the discharge main valve 34 of the valve mechanism 4 is closed and the flow rate is throttled as will be described later, and the differential pressure P ₁ −
P ₂ decreases. However, when the pressure before and after the orifice 14 pulsates like the portion C in FIG. 5, the differential pressure P ₁ -P ₂ also fluctuates, making it difficult to judge fullness. Even in such a case, in the present embodiment, the water supply flow rate is calculated based on the change in the differential pressure P ₁ -P ₂ , and whether or not the water supply time until the water is full is monitored to determine when the water is full. It can detect when the water is full without being affected by.

Next, the operation of the valve mechanism 4 having the above construction and the processing executed by the control circuit 25 will be described.

As shown in FIG. 2, when the vehicle 2 arrives at the garage, the worker performs the water supply work to the clean water tanks 3 (3 _{1 to} 3 _n ) provided below the vehicles 2 ₁ to 2 _n. To do. That is,
Quick coupler workers stretching the hose 59 having one end connected to the branch pipe 12b ₁ ~12b _n of each water supply unit 10 ₁ to 10 _n at the bottom of each vehicle 2 ₁ to 2 _n, provided at the end of the hose 59 58 is connected to the water pipe 5.

Each vehicle 2₁~ 2_nIntake pipe 5 is hose 59
Through branch pipe 12b₁~ 12b _nConnected to
The operator turns on the start switch 19 of the control panel 18.
To make.

The control circuit 25 executes step S1 shown in FIG.
(Hereinafter, "step" is omitted.) It is checked whether the start switch 19 is turned on. When the start switch 19 is turned on in S1, the process proceeds to S2, and the water supply indicator lamp 22 of the operation panel 18 is turned on. Subsequently, power is supplied to the solenoid valve 17 to open the solenoid valve 17 (S3).

When the solenoid valve 17 is opened, the water sent from the water storage tank 11 under pressure to the pump 13 is branched into the branch pipe 12b ₁ ,
It flows into the water intake chamber 40 of the valve mechanism 4 via the hose 59 and the water intake pipe 5. As a result, the pressure in the water intake chamber 40 increases,
As shown in FIG. 7, the piston 39 moves upward to move the piston 3
The projection 39a of 9 contacts the auxiliary discharge valve 35 and pushes it up. Therefore, the auxiliary discharge valve 35 is separated from the main discharge valve 34 to open the through hole 34a. At the same time, the drain valve 37 closes and sits on the valve seat 52.

When the water supply to the clean water tank 3 is started as described above, the air in the clean water tank 3 flows out from the tank overflow pipe 7 into the overflow chamber 44, and the through hole 34a of the discharge main valve 34 is further provided. Through the drain chamber 45 to the drain pipe 8. By the opening operation of the discharge auxiliary valve 35, the overflow chamber 44
When the pressure of the discharge main valve 34 decreases, the piston 39 pushes the discharge main valve 34 upward as shown in FIG.
Away from. When the discharge auxiliary valve 35 and the discharge main valve 34 are opened stepwise in this way, the pressure in the clean water tank 3 is lowered and the check valve 33 is separated from the valve seat 42. Therefore, with the opening operation of the check valve 33, the water in the water intake chamber 40 flows into the water supply chamber 41, further passes through the tank water supply pipe 6, and is supplied to the clean water tank 3.

[0050] with the water supply starts, the branch upstream pressure sensor provided in the pipe 12b ₁ 15 and downstream pressure sensor 1
6 is the upstream pressure P ₁ and the downstream pressure P _{2 of the} orifice 14.
Is detected and the detection signal is output to the control circuit 25. The pressure changes of the upstream pressure P ₁ and the differential pressure P ₁ -P ₂ at the start of water supply are as shown in the portion A of FIG.

In S4 of FIG. 6, it is checked whether or not the differential pressure P ₁ -P ₂ has decreased (abnormality determining means). Solenoid valve 1
When 7 is opened and water is normally supplied to the clean water tank 3, the differential pressures P ₁ -P ₂ are sharply increased by the opening operation of the check valve 33, the discharge main valve 34, and the discharge auxiliary valve 35. It grows, but it drops soon. However, for example, when the solenoid valve 17 fails and does not open, the pressure change does not occur.

Therefore, it can be confirmed that the water supply is started by the decrease in the differential pressure P ₁ -P ₂ . Therefore, S4
When a decrease in the differential pressure P ₁ -P ₂ is detected, it is determined to be normal and the process proceeds to S5 to calculate the flow rate based on the differential pressure P ₁ -P ₂ (flow rate calculating means).

If the differential pressure does not decrease in S4, the control circuit 25 proceeds to S14 to turn off the water supply indicator lamp 22 and turn on the abnormality indicator lamp 24.
Subsequently, it is checked whether or not the operator notices that the abnormality indicator lamp 24 is turned on and operates the reset switch 21 on (S15). When the reset switch 21 is operated on, the procedure proceeds to S16 and the abnormality indicator lamp 23 is checked. To turn off. In this case, after turning on the reset switch 21, the operator investigates the reason why the water supply is not started, repairs the faulty part, and turns on the start switch 19 of the control panel 18 again.

In S6, it is determined whether the flow rate is sufficient for full water detection. In this embodiment, since the upstream pressure sensor 15 and the downstream pressure sensor 16 are used to determine fullness based on the change in the differential pressure P ₁ -P ₂ , the control circuit 25 has a flow rate value necessary for differential pressure detection in advance. It is set.

If the flow rate of the supplied water is equal to or greater than the predetermined flow rate in S6, the process proceeds to S7 and the capacity t of the clean water tank 3 is divided by the flow rate calculated in S5 to calculate the time t until full water. Then, in S8, the full water time t is set and the full water timer is started. However, in S6, if the water supply flow rate is not sufficient, the process proceeds to S17, in which the water supply indicator lamp 22 blinks to notify the operator.

In S9, it is checked whether or not the clean water tank 3 is filled with water due to the change in the differential pressure P ₁ -P ₂ . In other words, the water tank 3 becomes full and the overflow pipe 7 of the valve mechanism 4
When the overflow water flows into the overflow chamber 44, the overflow chamber 44 is filled with the overflow water, but the flow rate passing through the opening 56a of the valve seat 56 and discharged to the drain chamber 45 is smaller than the flow rate supplied from the intake pipe 5.
Therefore, the water supply flow rate to the clean water tank 3 is throttled, the flow rate in the upstream branch pipe 12b also decreases, and the upstream pressure P ₁ of the orifice 14 increases accordingly, as shown by the broken line in FIG. Then, the differential pressure P ₁ -P ₂ decreases.

At S9, the upstream pressure P ₁ and the differential pressure P
₁ by the change of -P ₂ when it is determined that the clean water tank 3 becomes full water starts a overflow timer proceeds to S10 (pre-time from full level detected until the overflow is set). When the clean water tank 3 becomes full, the water in the clean water tank 3 overflows and flows into the overflow chamber 44 of the valve mechanism 4 through the overflow pipe 7. Main discharge valve 3
4. Since the discharge assist valve 35 is opened as described above, the water flowing into the overflow chamber 44 is discharged from the drain chamber 45 to the drain pipe 8.

In S11, it is checked whether or not the overflow timer has timed out. When the overflow timer times out in S11, the process proceeds to S12, the power supply to the solenoid valve 17 is stopped, and the solenoid valve 17 is closed.
Then, in S13, the water supply indicator lamp 22 is turned off, and the water supply process ends.

If the water is not full in S9, S
In step 18, it is checked whether or not the full water timer has timed out. If there is still time, the process returns to step S9. However, in S18, when the full water timer expires, the process proceeds to S19, in which the power supply to the solenoid valve 17 is stopped and the solenoid valve 17 is closed. Then, the process proceeds to S13, the water supply indicator lamp 22 is turned off, and the water supply process ends. This is a process for preventing overflow when the pressure in the pipe pulsates and it is not possible to determine when the water is full due to the pressure change.

When the solenoid valve 17 is closed, the water supply to the valve mechanism 4 is stopped and the pressure in the water intake chamber 40 of the valve mechanism 4 is reduced. As a result, the check valve 33 closes due to the pressing force of the coil spring 43 and comes into contact with the valve seat 42, and at the same time, the piston 39 descends. Discharge main valve 3 by lowering piston 39
4. The discharge assist valve 35 returns to the valve closed position shown in FIG.

At this time, since the inside of the clean water tank 3 is still at atmospheric pressure, the air valve 36 is opened by being pressed by the compressed air supplied from the air pipe 9, and the compressed air is overflowed into the overflow chamber 4.
4. The water is supplied into the clean water tank 3 through the overflow pipe 7, and the clean water tank 3 is pressurized to 1 kgf / cm ² G. When the inside of the clean water tank 3 and the inside of the overflow chamber 44 become 1 kgf / cm ² G, the air valve 36 is closed by the spring force of the small diameter spring 47 and the large diameter spring 48.

After confirming that the water supply to the clean water tank 3 is completed by turning off the water supply indicator lamp 22, the worker disconnects the quick coupler 58 of the hose 59 from the intake pipe 5 of the train 2 to complete a series of water supply. The work is finished.

As described above, when the water tank 3 is filled with water, the solenoid valve 17 is automatically closed to stop the water supply.
The operator does not need to perform troublesome work such as monitoring the overflow of water when the water is full, and once the water supply to one clean water tank 3 is started, the water supply work to another clean water tank 3 can be performed in parallel, which is small. The personnel can efficiently supply water to the clean water tank 3 of the entire train.

In the above embodiment, the case where water is supplied to the water tank of the train is given as an example, but the present invention is not limited to this, and other tanks (for example, tanks of ships, tank trucks, boiler tanks, etc.) can be supplied. Of course, it can also be applied to supply water.

Further, in the above embodiment, the flow rate is obtained based on the pressure difference between the upstream pressure P ₁ and the downstream pressure P ₂ , but the present invention is not limited to this, and flow meters of other systems may be used. good.

[0066]

As described above, the water supply device according to the present invention is
According to the first aspect, when the pressure detecting means detects a pressure change when the tank is full, it is determined that the tank is full, and the electromagnetic valve is closed, so that the tank is full. Can be automatically detected to stop the water supply, and the operator does not need to monitor the overflow water near the valve mechanism during the water supply work, and can start the water supply work to the next tank after the start of water supply. Therefore, one worker can take charge of water supply work to a plurality of tanks, and can perform water supply work efficiently. Further, since the fullness of water can be determined by the flow rate measuring means, overflow can be prevented even if the pressure change at the time of fullness cannot be detected.

According to the second aspect, when it is detected by the flow rate measuring means that the water supply of the tank capacity is completed,
By determining that the tank is full and closing the electromagnetic valve, it is possible to automatically detect that the tank is full and stop the water supply. The effect is obtained.

According to the third aspect of the present invention, when the pressure detecting means detects a change in pressure when the tank is full, or when the flow rate measuring means detects that the tank volume has been supplied with water, the tank is full of water. It is possible to automatically detect that the tank is full and stop the water supply by determining that the solenoid valve is closed and the same effect as the above claims 1 and 2 is obtained. can get.

Further, according to the fourth aspect, the flow rate is obtained based on the difference between the pressure on the upstream side of the orifice and the pressure on the downstream side of the orifice, thereby determining the full time without changing the valve mechanism and the tank. Therefore, the structure can be simplified.

According to the present invention, it is possible to inform the operator of an abnormality at the time of water supply by determining that there is an abnormality when the flow rate is not measured by the flow rate measuring means, and the equipment provided in the water supply system passage. If water is not supplied due to the failure of the, the water can be repaired immediately and the water supply work can be performed reliably.

Further, according to the sixth aspect, the tank and the valve mechanism are arranged at the lower part of the train, so that the water supply work for the train having a plurality of tanks can be automated. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a water supply device according to the present invention.

FIG. 2 is an overall configuration diagram of a water supply device.

FIG. 3 is a configuration diagram of a valve mechanism and a clean water tank.

FIG. 4 is an enlarged vertical sectional view showing the inside of the valve mechanism.

FIG. 5 is a graph showing a pressure change between the pressure on the upstream side of the orifice and the pressure difference.

FIG. 6 is a flowchart of processing executed by a control circuit.

FIG. 7 is a vertical cross-sectional view showing the operation of the valve mechanism at the start of water supply.

FIG. 8 is a vertical cross-sectional view showing the operation of the valve mechanism after the start of water supply.

[Explanation of symbols]

1 Water supply device 2 (2 ₁ , 2 ₂ , ..., 2 _n ) Vehicle 3 (3 _{1 to} 3 _n ) Clean water tank 4 Valve mechanism 5 Water intake pipe 6 Tank water supply pipe 7 Tank overflow pipe 8 Drain pipe 9 Air pipe 10 ( 10 ₁ to 10 _n ) Water supply unit 11 Water storage tank 12 Water supply line 14 Orifice 15 Upstream pressure sensor 16 Downstream pressure sensor 17 Electromagnetic valve 18 Control panel 25 Control circuit 27 Valve body 28 Water intake 29 Water supply port 30 Overflow inlet 31 Drainage port 32 Air port 33 Check valve 34 Discharge main valve 35 Discharge auxiliary valve 36 Air valve 37 Drain valve 38 Safety valve 39 Piston 44 Overflow chamber 45 Drain chamber

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinori Oguchi Yoshinori, Aichi Prefecture, Nakamura-ku, Nagoya, 1-4-1, Meieki, Tokai Passenger Railway Co., Ltd. (72) Inventor Takeshi Sato 3--9, Meguro, Meguro-ku, Tokyo No. 1 Tokico Yuuki Co., Ltd. (72) Inventor Aya Saku, Meguro 3-9-1, Meguro-ku, Tokyo No. 1 Tokico Yuuki Co., Ltd. (72) Inventor Kazumasa Kawasaki 1-chome Fujimi, Kawasaki-ku, Kanagawa Prefecture No. 6-3 Tokiko Co., Ltd. (72) Inventor Masanori Ikeda 1-6-3 Fujimi, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Tokiko Co., Ltd. (72) Satoshi Kikuta 1-6 Fujimi, Kawasaki-ku, Kanagawa Prefecture No. 3 Tokico Corporation

Claims (6)

[Claims] 1. A pipe line connected to a supplied water tank mechanism, and a valve mechanism arranged in the pipe line for discharging overflow water overflowing from the tank when the tank of the supplied water tank mechanism is full. An electromagnetic valve disposed in the pipeline on the upstream side of the valve mechanism; a pressure detection unit provided in the pipeline on the upstream side for detecting a water supply pressure of the pipeline on the upstream side; A water supply device comprising: a control unit that, when the detection unit detects a pressure change when the tank is full, determines that the tank is full and closes the electromagnetic valve. 2. A pipe line connected to a water supply tank mechanism, and a valve mechanism arranged in the pipe line for discharging overflow water overflowing from the tank when the tank of the water supply tank mechanism is full. An electromagnetic valve disposed in the pipeline on the upstream side of the valve mechanism; a flow rate measuring unit provided in the pipeline on the upstream side for measuring a flow rate flowing through the pipeline on the upstream side; When the measuring means detects that the tank capacity has been filled with water, it is determined that the tank has been filled with water, and the control means is configured to close the solenoid valve. . 3. A pipe line connected to a water supply tank mechanism, and a valve mechanism arranged in the pipe line for discharging overflow water overflowing from the tank when the tank of the water supply tank mechanism is full. An electromagnetic valve disposed in the pipeline on the upstream side of the valve mechanism; pressure detection means provided in the pipeline on the upstream side for detecting the water supply pressure of the pipeline on the upstream side; Flow rate measuring means for measuring the flow rate flowing through the upstream side pipeline, when the pressure change at the time of fullness is detected by the pressure detecting means, or of the tank capacity by the flow rate measuring means. When it is detected that the water supply is completed, it is determined that the inside of the tank is full, and the control means for closing the electromagnetic valve is provided. 4. A flow rate calculation means for calculating a flow rate based on an orifice provided in the upstream pipe line and a difference between a pressure on the upstream side of the orifice and a pressure on the downstream side of the orifice. The water supply device according to claim 2 or 3, further comprising: 5. The water supply apparatus according to claim 2, wherein the control means has an abnormality determination means that determines that there is an abnormality when the flow rate is not measured by the flow rate measurement means after the water supply is started. 6. The water supply tank mechanism and the valve mechanism are arranged in the lower portion of the train.
2 or 3 water supply device.