JPH069000A - Water supply apparatus with spare tank - Google Patents

Abstract

PURPOSE:To maintain emergency-use potable water in fresh conditions by a method wherein water is stored in an airtight spare tank under a pressurized condition, flow rate/pressure control devices are provided between the spare tank and the water supply side and between the spare tank and the water use side, and controls are carried out corresponding to the water level and the pressure inside the spare tank. CONSTITUTION:Water is supplied into a spare tank 2 from a water supply section 3 such as city water through a water supply pipe 9 equipped with an on-off valve 13, a motor-driven valve 14, etc. When a level switch 19 or a pressure sensor 20 detects that water is supplied up to a specified water level 17 or the pressure reaches a specified pressure P, the motor-driven valve 14 is brought in action via a control section 5 to shift the water supply direction or stop water supply. When water is sent to water use sides 8 and the water level 17 changes, the motor-driven valve 14 is opened or the water supply direction is diverted based on outputs of the level switch 19 to supply water from the water supply section 3. When flow rate or pressure control is required at a water delivery pipe 10 or water use-sides 8 during water is used, a flow rate/pressure control valve 7a is operated to control flow rate or pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stores supply water in a pre-storage tank in advance, and if necessary, directly supplies water at an appropriate pressure from the tank to the supply water use side and also prevents adverse effects such as fluctuations in water pressure. The present invention relates to a water supply device including a pre-storage tank suitable for suppressing and stably supplying an appropriate amount of water.

[0002]

2. Description of the Related Art For example, in general households and buildings, it is often necessary to secure emergency water and water for equipment such as sprinklers in addition to drinking water. As a conventional water supply means, direct water supply by water supply or water suctioned by a pump from a water storage tank is generally supplied.

[0003]

[Problems to be Solved by the Invention] In the case of performing emergency drinking water, water for sprinklers, and water supply in the event of a fire,
The following problems occur when using conventional water supply or a pump. That is, since the amount of water used is not always constant, the required amount of water tends to be insufficient. In addition, when water is supplied by water or a pump, there is a risk that the water will be cut off due to an earthquake or power failure. Further, the water pressure of the tap water is apt to fluctuate, and it is not suitable for fire extinguishing equipment or the like that must supply water at a constant pressure. Therefore, it is necessary to install another dedicated tank for fire extinguishing, etc., and the equipment cost is high.
Further, in the case of water supply from a water storage tank, there is a risk of dead water supply, and it is not suitable as drinking water. In addition, there is a case in which an appropriate preventive measure for preventing the water hammer phenomenon due to the change in the amount of water on the supply water side is not provided.

The present invention solves the above problems and the like, and is installed above ground or underground so that emergency drinking water for general households etc. can always be kept in a fresh state, and water of appropriate pressure can be secured. It is an object of the present invention to provide a water supply device provided with a pre-storage tank that can stably supply water and can also cope with pressure fluctuations on the side of supply water use and water hammer phenomenon.

[0005]

In order to achieve the above object, the present invention provides a sealed pre-storage tank for storing an appropriate amount of water under pressure, and supplying water and air into the tank. A water supply unit and an air supply unit, a backflow prevention unit that prevents the backflow of water in the tank, and a flow rate that is provided between the tank and the water supply unit side and the supply water use side to adjust the flow rate and pressure of the supply water. A water supply system having a pressure control unit and a pre-storage tank provided with a control unit for maintaining the water surface level and the internal pressure in the tank at predetermined values and controlling the flow rate / pressure control unit and the like was devised. In addition, specifically, the backflow prevention part is a check valve provided in a water supply pipe connected to the water supply part and an upper part or a lower part of the pre-storage tank, and a water discharge opening end of the water supply pipe to the pre-storage tank. Is placed at a position (L) higher than the set water surface level of the pre-storage tank at the time of water storage, and a vacuum breaker or the like for preventing negative pressure in the water supply pipe between the water supply section and the pre-storage tank. It consists of a single or a combination. As a flow rate / pressure control unit, it is installed in the water discharge pipe between the pre-storage tank and the supply water use side to mitigate abnormal pressure rise in the pipe, and to prevent high pressure water supply, a pressure control valve and excessive water flow prevention. A safety mechanism that has a regulating valve, etc., and an emergency shutoff valve that shuts off water flow when the pipes on the water supply side and the water supply side are damaged, and the pressure in the pre-storage tank is higher than the desired value. A booster pump that supplies boosted water when the temperature is low and a flow control valve for the booster pump are used. Further, according to the present invention, the water supply unit is connected to a supply water using side via a pressure sensor and a check valve by a water supply pipe, and the water supply pipe and the water discharge pipe downstream of the pre-storage tank are branched. The water supply device is equipped with a pre-storage tank connected by. In addition, a pre-storage tank is formed from a plurality of pre-storage tanks, and a motor-operated valve or the like for selectively using the pre-storage tanks is provided between the plurality of pre-storage tanks and the supply water use side. The water supply device is provided with a tank.

[0006]

Function: Water of a predetermined pressure is supplied from the water supply section into the pre-storage tank. The check valve holds the maximum pressure or constant pressure of the water supply pipe in the pre-storage tank, and stores water at a constant water surface level. When the stored water is used, fresh water is replenished in the pre-storage tank to maintain a constant water surface level and the stored water is continuously replaced. Therefore, there is no fear of stockpiling dead water. When the pressure in the pre-storage tank drops or the water level changes, the control unit operates and water and air are supplied. In some cases, it is not necessary to control the water surface level and pressure by the control unit. On the other hand, even if the stored water tries to flow backward from the pre-storage tank, it is prevented by the check valve in the water supply pipe and the distance (L) between the water discharge opening end of the water supply pipe and the water level. Also,
Even if the inside of the water supply pipe becomes negative pressure, backflow is prevented by the action of the vacuum breaker. On the other hand, when a pressure fluctuation or an abnormal phenomenon occurs on the supply water use side or the downstream side of the pre-storage tank, the pressure or flow rate is adjusted by the flow rate / pressure control unit, and sometimes the water flow is shut off to maintain a normal state. Further, it is possible to directly connect the supply side of the supply water and the water supply unit to supply water, or to prevent the water pressure from decreasing by supplying water of a constant pressure in the pre-storage tank when the water pressure of the water supply unit decreases. In addition, the pre-storage tank also has a shock absorber function to mitigate the water hammer phenomenon. Furthermore, by using a plurality of pre-storage tanks, it is possible to always use a high pressure while preventing dead water, and it is possible to prevent a decrease in water pressure. As described above, it is possible to constantly and stably supply water at a predetermined pressure and at a sufficient flow rate in a fresh state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram for explaining the outline of the whole structure of the present invention, FIG. 2 is a structure diagram for explaining the most general structure of the present invention, and FIG. 3 is a device structure of a simple structure. Fig. 4 shows an embodiment in which a booster pump is used for the flow rate / pressure control unit, Fig. 5 shows a case where the pre-storage tank is installed at a relatively high position such as the top floor of the building, and Fig. 6 shows water supply. Fig. 7 shows a case where the water supply unit and the side using the supply water are directly connected.
Shows a structural diagram when a plurality of pre-storage tanks divided into upper and lower parts are used, respectively. In FIG. 1, a water supply device 1 includes a pre-storage tank 2 for storing water and a pre-storage tank 2
Water supply section 3 and air supply section 4 for supplying water and air of appropriate pressure, backflow prevention section 6 for preventing backflow from pre-storage tank 2 to water supply section 3 side, pre-storage tank 2 and water supply section 3 And a flow rate / pressure control unit 7 which is provided between the supply water use side 8 and adjusts the flow rate and pressure, and controls the water level and the internal pressure in the pre-storage tank 2 and also controls the flow rate / pressure control unit and the like. It is composed of the control unit 5 and the like. An upstream pipe connecting the water supply unit 3 and the air supply unit 4 to the pre-storage tank 2 is a water supply pipe 9, and a downstream pipe connecting the pre-storage tank 2 and the supply water use side 8 is a water discharge pipe 10. , Water supply section 3
A pipe that directly connects the feed water use side 8 with the water supply side 8 is a water supply pipe 11, and a pipe interposed between the water supply pipe 11 and the water discharge pipe 10 is a branch pipe 12. Hereinafter, a specific structure of the water supply device 1 including the main components shown in FIG. 1 will be described in the following embodiments.

[0008]

[Embodiment 1] In FIG. 2, the water supply unit 3 is a water supply or a water supply source. An on-off valve 13 is provided in the water supply pipe 9 connected to the water supply unit 3. An ejector 4a, which is an example of the air supply unit 4, and a check valve 15 are disposed in the bypass passage 9a that is connected to the water supply pipe 9 via the electric valve 14. A spout space having a distance (L) between the water discharge opening end 16 of the water supply pipe 9 connected to the upper side of the pre-storage tank 2 and inserted therein and the set water surface level 17 at the time of stored water of the pre-storage tank 2. 18 is formed.
The pressure in the pre-storage tank 2 is maintained at P while the water level 17 is maintained. The pressure P is substantially equal to the maximum pressure of the fluctuation pressures of the water supplied from the water supply section 3. In the present embodiment, the control unit 5 is provided with a level switch 19 for detecting fluctuations in the water surface level 17, a pressure sensor 20 for detecting changes in the pressure P, and a controller 21.
The control unit 5 controls the electric valve 14 of the controller 21 to introduce necessary water and air into the pre-storage tank 2. In the present embodiment, the backflow prevention unit 6 is composed of the above-described water outlet space 18, the check valve 22 arranged in the water supply pipe 9, and the vacuum breaker 23. The check valve 22 prevents backflow of water from the pre-storage tank 2 and
The inside is maintained at the pressure P. The vacuum breaker 23 functions to prevent backflow by supplying air into the water supply pipe 9 when an abnormality occurs on the upstream side of the water supply pipe 9 or the like and the inside of the water supply pipe 9 becomes negative pressure. . In this case, a check valve 26 is provided in the pre-storage tank 2 so that water does not flow backward from the downstream side. On the other hand, an opening / closing valve 24 and a water supply tap 25 are provided in the water discharge pipe 10 on the downstream side, and a flow rate / pressure control which is one of safety mechanisms for adjusting the pressure and the flow rate when the pressure in the pipe abnormally rises. The valve 7a is provided. Further, in the present embodiment, the sprinkler 8a, the general water supply 8b, or the like is applied as the supply water use side 8. A safety valve 46 is attached to the pre-storage tank 2. Instead of connecting the water supply pipe 9 to the upper side of the pre-storage tank 2 as shown by the dotted line in FIG. 2, the water supply pipe 9 may be connected to the lower side and the vacuum breaker 23 and the like may be eliminated for simplification.

Next, the operation of this embodiment will be described. Water from the water supply unit 3 is supplied to the water supply pipe 9 through the on-off valve 13, the motor-operated valve 14, etc.
Is supplied to the pre-storage tank 2. Level switch 19
Alternatively, the pressure sensor 20 sends a detection signal to the controller 21 side of the control unit 5 when the supplied water reaches the set water surface level 17 or the predetermined pressure P. The motor-operated valve 14 is activated by a control signal from the control unit 5 to change the water flow direction or stop the water supply. Although the water pressure of the water supplied from the water supply unit 3 fluctuates, the check valve 22 is held at the maximum pressure of the fluctuation pressure. Further, when the water pressure of the supply water is abnormally high, the motor-operated valve 14 is closed to prevent the pressure from rising. When water is sent to the supply side 8 and the water level 17 changes,
The controller 21 according to the detection signal of the level switch 19
Water is supplied from the water supply unit 3 by opening the motor-operated valve 14 or changing the water flow direction via the. As a result, the water surface level 17 in the pre-storage tank 2 is always kept within a fixed range.
When it is necessary to control the pressure or flow rate on the discharge pipe 10 or the supply water side 8 during use, the flow rate / pressure control valve 7
a operates and stable supply is performed. In the case of an abnormality such as pipe breakage, the discharge of water is stopped by closing the on-off valve 24, the flow rate / pressure control valve 7a, and the like. Further, when drinking water or the like is required, it is possible to drink water at any time by opening the water tap 25. Furthermore, when the water hammer phenomenon occurs in the water discharge pipe 10 due to the opening / closing operation of the supply water use side 8 during use, the pressure fluctuation is alleviated by the air chamber of the pre-storage tank 2 and the water hammer phenomenon is attenuated ( In this case, it is necessary to prevent the check valve 26 from operating. Further, by setting the amount of stored water in the pre-storage tank 2 to an appropriate amount, even if there is a pressure drop in the water supply source, the use side is not affected, and the peak cut of the use amount is smoothly performed. On the other hand, when the water in the pre-storage tank 2 is not used,
When the air above the pre-storage tank 2 gradually dissolves in water to cause a shortage of the amount of air and the water level 17 rises, the level switch 19 or the pressure sensor 20 detects the phenomenon, and the control unit 5 causes the motor-operated valve. 14 is operated, water is caused to flow to the bypass 9a side, and air is supplied from the ejector 4a into the pre-storage tank 2. Thereby, the pressure in the pre-storage tank 2 and the water surface level 17 are always kept constant. on the other hand,
Even if the water surface level 17 suddenly rises, the motor-operated valve 14 operates before the water surface level 17 reaches the water discharge opening end 16 of the water supply pipe 9 because there is the water outlet space 18 set to the distance (L). The water supply is cut off. Even if the water surface level 17 reaches the water discharge opening end 16 and a backflow occurs in the water supply pipe 9, the check valve 22 prevents the backflow, and the backflow from the pre-storage tank 2 is completely prevented. As described above, an appropriate amount of water having the predetermined water surface level 17 of the pressure P is constantly stored in the pre-storage tank 2, and it is possible to always deal with the use of the supply water use side 8.

[0010]

[Embodiment 2] FIG. 3 shows a second embodiment in which the first embodiment shown in FIG. 2 is simplified. In the figure, the same reference numerals as those in FIG. The description is omitted. In this embodiment, the water supply pipe 9 is connected to the lower side of the pre-storage tank 2 and has a simple structure in which the vacuum breaker 23 and the like in FIG. 2 are omitted. Further, as the controller unit 5, only the level switch 19 is adopted without using the pressure sensor 20. Further, only the check valve 22 is adopted as the check valve. The water supply device shown in FIG. 2 is formed by anticipating almost all the phenomena that can occur in this water supply / discharge system, and in practice the water supply device shown in FIG. 3 is often sufficient. In addition, the ejector 4 is further simplified depending on the purpose.
The level switch 19 and the like can also be omitted.

Third Embodiment FIG. 4 shows a third embodiment. Also in the present embodiment, the same reference numerals as those in the above-mentioned embodiments indicate the same things and the same functions, and the explanation thereof will be omitted. In this embodiment, in addition to the flow rate / pressure control valve 7a, the booster pump 27 and the water flow detection sensor 28 are used as the flow rate / pressure control unit 7 shown in FIG.
Is adopted. Although the internal pressure in the pre-storage tank 2 is maintained at the pressure P, there are some cases where the internal pressure falls below the pressure P or the pressure P cannot be obtained. On the other hand, when the supply water use side 8 needs the supply water at the pressure P, waiting for the pressure increase in the pre-storage tank 2 is not enough for emergency use. Therefore, the booster pump 27 is used. That is, the level switch 19 or the pressure sensor 20 and the water passage detection sensor 28 detect a pressure drop, and when the water passage state is confirmed, the booster pump 27 is activated to supply water to the supply water use side 8 at a predetermined pressure. In that case, the flow rate / pressure control valve 7a is applied in order to prevent a sudden drop in the water level in the pre-storage tank 2. The booster pump 27 and the stored water in the pre-storage tank 2 can supply water at an appropriate pressure (pressure P) even when the pressure in the pre-storage tank 2 drops. When the pressure in the pre-storage tank 2 is abnormally reduced, the power stop abnormality device (not shown) of the control unit 5 acts to reduce the pressure decrease on the water supply side.

[0011]

Fourth Embodiment FIG. 5 shows a fourth embodiment. This embodiment is applied when the pre-storage tank 2 is installed at a high position, for example, on the rooftop of the top floor of the building. In FIG. 5, the same reference numerals as those used in the above embodiment denote the same things or the same functions,
The description is omitted. In this embodiment, an air valve 29 is attached to the pre-storage tank 2. When the pre-storage tank 2 or the like is installed on the roof, the air in the lower pipe or the like rises and enters the pre-storage tank 2. Therefore, the water supply from the water supply unit 3 may not be smoothly performed. The air valve 29 exhausts the air in the pre-storage tank 2. After the air is discharged by the air valve 29, normal water supply is performed.

[0012]

[Embodiment 5] FIG. 6 shows an embodiment in which the supply water side 8 requires a large amount of water such as a fire hydrant. The pressure sensor 30 installed on the water supply unit 3 side detects the pressure in the water supply pipe 9 and sends a pressure detection signal to the control unit 5 side. The water supply pipe 11 branches from the water supply pipe 9 on the downstream side of the pressure sensor 30 and is connected to the supply water use side 8. The branch pipe 12 between the water discharge pipe 10 and the water supply pipe 11 is connected to the water discharge pipe 10 via an electric valve 32. In addition, the water supply pipe 11 is a pipe 31 provided with a check valve 34.
Is connected to the pre-storage tank 2 side. Further, as shown in the drawing, a drain pipe 35 is connected to the water discharge pipe 10 via an electric valve 32. When the stored water in the pre-storage tank 2 is not particularly required, water is directly supplied from the water supply unit 3 to the supply water use side 8 via the water supply pipe 11. In this case, supply side 8
When the water hammer fluctuates due to water pressure in the water tank, the check valve 33 prevents the back flow to the water supply unit 3 side, and the water hammer enters the pre-storage tank 2 through the pipe 31 and the check valve 34. The phenomenon is propagated and alleviated. When the fire hydrant is used on the supply water use side 8, the water pressure from the water supply part 3 may be insufficient. In that case, the control unit 5 operates by the pressure detection signal from the pressure sensor 30 and switches the electric valve 32 to the pre-storage tank 2 side. As a result, the stored water in the pre-storage tank 2 held at the maximum pressure P is sent to the supply water use side 8 to enable the water discharge of the fire hydrant. The pressure difference between the pressure sensor 30 and the pressure sensor 20 is detected, and when the difference is small, the preliminary storage tank 2
Use the water inside or change the water flow direction according to the time chart to prevent the occurrence of dead water. Moreover, the water in the pre-storage tank 2 can be appropriately discharged from the drain pipe 35 to prevent dead water.

[0013]

Sixth Embodiment FIG. 7 shows an embodiment in which a plurality of pre-storage tanks are used. In this embodiment, the pre-storage tanks are connected in the upper and lower direction and are composed of an upper pre-storage tank 2a and a lower pre-storage tank 2b. Of course, the pre-storage tank 2 is not limited to the vertically arranged tanks as shown in the drawing, and is not limited to the one divided into two chambers. The upper pre-storage tank 2a is connected to the first electric valve 37 via the pipe 36, and the lower pre-storage tank 2b is connected to the first electric valve 37 via the pipe 38. The first electric valve 37 is connected to the supply water use side 8 via an opening / closing valve 39 and a flow rate / pressure control unit 7. On the other hand, a branch pipe 40 from the pipe 36
Is connected to the pipe 43 on the downstream side of the first electric valve 37 via the second electric valve 41, and the branch pipe 42 of the pipe 38 is also downstream of the first electric valve 37 via the second electric valve 41. It is connected to the side pipe 43. Further, check valves 44 and 45 capable of passing water in the directions of the arrows are provided in the branch pipe 40 and the branch pipe 42. As shown, level switches 19a and 19 are provided on the upper pre-storage tank 2a and the lower pre-storage tank 2b, respectively.
b, pressure sensors 20a, 20b, vacuum breaker 2
3a, 23b, check valves 22a, 22b, water tap 25a,
25b, safety valves 46a, 46b, etc. are attached respectively.

In FIG. 7, the water supply section 3 is the same as in the above embodiment.
From the water supply pipe 9, water is supplied into the upper pre-storage tank 2a and the lower pre-storage tank 2b, and water having a predetermined pressure and a predetermined water surface level is stored. Upper and lower pre-storage tanks 2a,
Control of the water surface level and internal pressure of 2b and prevention of backflow are carried out in the same manner as in the above embodiment. When water is supplied from the upper pre-storage tank 2a to the supply water use side 8, the first electric valve 37 is opened toward the upper pre-storage tank 2a side and the lower pre-storage tank 2b side is closed. On the other hand, the second electric valve 41 closes the upper pre-storage tank 2a side and opens the lower pre-storage tank 2b side. As described above, the stored water in the upper pre-storage tank 2a is supplied from the pipe 36 to the supply water use side 8 via the first electric valve 37. In this case, when the water hammer phenomenon occurs on the supply water use side 8, it is transmitted to the lower pre-storage tank 2b through the branch pipe 42 and is alleviated. On the other hand, when the stored water in the upper pre-storage tank 2a is consumed to some extent, the first motor operated valve 3
Switch 7 That is, the upper preliminary storage tank 2a side is closed and the lower preliminary storage tank 2b side is opened. The second electric valve 41 is switched so that the upper pre-storage tank 2a side is opened and the lower pre-storage tank 2b side is closed. As described above, the stored water in the lower pre-storage tank 2b is supplied to the supply water use side 8 and the water hammer phenomenon is alleviated by the upper pre-storage tank 2a. In addition, the pressure increase generated on the supply water use side 8 is controlled by the pre-storage tank 2a above or below the non-use side.
2b can be incorporated to increase the pressure in the tank. As described above, while one of the pre-storage tanks is being used, new water is stored in the other pre-storage tank, and new water is not supplied during use, so there is no dead water, and there is always fresh water. Can be supplied. Further, since the water having the highest pressure can always be supplied to the supply water use side 8, it is possible to sufficiently cope with the one that requires the pressure and the water amount such as the sprinkler.

Although the respective constituent elements have been described in detail in the above embodiments, their structures are not limited to those described above. Moreover, although domestic drinking water, a sprinkler fire hydrant, etc. were demonstrated as the supply water use side 8, it is not restricted to them. Also, the capacity of the pre-storage tank 2,
The value of the pressure P is appropriately set according to the intended use. Further, the control method of the controller unit is not limited to the above.

[0016]

According to the present invention, the following remarkable effects are obtained. (1) By using the pre-storage tank, sufficient water can be stably supplied without using a supply pump unlike the prior art. (2) The water level and the internal pressure in the pre-storage tank are always kept constant and at the highest pressure from the water supply section, so that water with a predetermined pressure is always supplied to the user side in a fresh state. To be done. (3) Abnormal pressure rise on the use side and water hammer phenomenon are alleviated by the pre-storage tank and the flow rate / pressure control unit. In addition, the water in the pre-storage tank is used for emergency even when an abnormality such as an earthquake occurs. (4) Since a sufficient amount of water is stored in the pre-storage tank, it is effective for peak cut and it is possible to reduce the pressure fluctuation of the water supply source. (5) By adopting the triple structure of the check valve, the spout space, and the vacuum breaker in the backflow prevention unit, the backflow is completely prevented and the water supply unit side is not adversely affected. (6) Even if the amount of air in the pre-storage tank is insufficient, air is automatically supplied from the air supply unit, so that air is always present in the pre-storage tank and functions to reduce pressure fluctuations. (7) By installing a pre-storage tank that is also used for direct water supply such as water supply, it is possible to smoothly and swiftly respond to a decrease in water supply pressure. Therefore, it is possible to appropriately respond to emergency use such as a fire hydrant. (8) When an air valve or dead water drainage pipe is provided, unnecessary air in the pre-storage tank is removed and dead water is stored. (9) By using a plurality of pre-storage tanks, it is possible to retain the water in the pre-storage tank near the maximum value of the water supply pipe pressure and meet the intended use. In addition, the continuous supply of a large amount of water is smoothly performed by switching and using. Further, the effects of the above (1) to (8) are enhanced.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating an overall schematic configuration of the present invention.

FIG. 2 is an overall structural diagram of the first embodiment of the present invention.

FIG. 3 is an overall structural diagram showing a second embodiment in which the first embodiment is simplified.

FIG. 4 is an overall structural diagram of a third embodiment of the present invention.

FIG. 5 is an overall structural diagram of a fourth embodiment of the present invention.

FIG. 6 is an overall structural diagram of a fifth embodiment of the present invention.

FIG. 7 is an overall structural diagram of a sixth embodiment of the present invention using a plurality of pre-storage tanks.

[Explanation of symbols]

 1 water supply device 2 pre-storage tank 2a upper pre-storage tank 2b lower pre-storage tank 3 water supply unit 4 air supply unit 5 control unit 6 backflow prevention unit 7 flow rate / pressure control unit 7a flow rate / pressure control valve 7b flow rate / pressure control valve 8 Water supply side 8a Sprinkler 8b Water supply 9 Water supply pipe 9a Bypass passage 10 Water discharge pipe 11 Water supply pipe 12 Branch pipe 13 Open / close valve 14 Motorized valve 15 Check valve 16 Water discharge opening end 17 Water level 18 Water discharge space 19 Level switch 19a Level switch 19b Level switch 20 Pressure sensor 20a Pressure sensor 20b Pressure sensor 21 Controller 22 Check valve 22a Check valve 22b Check valve 23 Vacuum breaker 23a Vacuum breaker 23b Vacuum breaker 24 Open / close valve 25 Water tap 25a Water tap 25b Water tap 26 Check valve Valve 27 -Star pump 28 Water flow detection sensor 29 Air valve 30 Pressure sensor 31 Piping 32 Electric valve 33 Check valve 34 Check valve 35 Drain pipe 36 Piping 37 First electric valve 38 Piping 39 Open / close valve 40 Branch pipe 41 Second electric valve 42 Branch pipe 43 Piping 44 Check valve 45 Check valve 46 Safety valve 46a Safety valve 46b Safety valve

[Procedure amendment]

[Submission date] July 26, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Although the respective constituent elements have been described in detail in the above embodiments, their structures are not limited to those described above. Moreover, although domestic drinking water, a sprinkler fire hydrant, etc. were demonstrated as the supply water use side 8, it is not restricted to them. Also, the capacity of the pre-storage tank 2,
The value of the pressure P is appropriately set according to the intended use. Further, the control method of the controller unit is not limited to the above. Also, the above-mentioned embodiment
In the above, the spare tank is a tank-shaped pillar, but
Not something. For example, the water supply pipe 9 and the water discharge pipe 10
A pipe with a larger diameter may be used. In this case, the pipe is vertical
It may be placed horizontally or horizontally.

Claims (11)

[Claims] 1. A closed pre-storage tank for storing an appropriate amount of water under pressure, a water supply section and an air supply section for supplying water and air into the tank, and a reverse flow of water in the tank. A backflow prevention unit that prevents the flow, a flow rate / pressure control unit that adjusts the flow rate and pressure of the supply water that is provided between the tank and the water supply unit side and the supply water use side, and the water level and the internal pressure in the tank to predetermined values. A water supply apparatus having a pre-storage tank, which is provided with a control unit for holding and controlling the flow rate / pressure control unit and the like. 2. The water supply apparatus with a pre-storage tank according to claim 1, wherein the backflow prevention part is a check valve provided in a water supply pipe between the pre-storage tank and the water supply part. 3. The water supply apparatus having a pre-storage tank according to claim 3, wherein the water supply pipe is connected to an upper side or a lower side of the pre-storage tank. 4. The backflow prevention unit is configured such that a water discharge opening end of a water supply pipe to the pre-storage tank is arranged at a position higher by a distance (L) than a set water surface level of the pre-storage tank during water storage. A water supply device comprising the pre-storage tank according to claim 1. 5. The water supply apparatus with a pre-storage tank according to claim 1, wherein the backflow prevention unit is a vacuum breaker that prevents negative pressure in the water supply pipe between the water supply unit and the pre-storage tank. 6. A water supply apparatus having a pre-storage tank according to claim 1, wherein the backflow prevention part is a combination of claims 3, 4, and 5. 7. A safety mechanism section for interposing the flow rate / pressure control section in a water discharge pipe arranged between the pre-storage tank and a supply water use side to mitigate an abnormal pressure rise in the pipe, and a water supply unit. The water supply device provided with the pre-storage tank according to claim 1, comprising an emergency shutoff valve for shutting off water flow when the pipes on the supply side and the supply water side are damaged. 8. The storage unit according to claim 1, wherein the flow rate / pressure control unit includes a booster pump that supplies water of a predetermined pressure when the pressure in the pre-storage tank is lower than a desired value and a flow rate adjusting valve thereof. Water supply device with storage tank. 9. The water supply section for supplying water into the pre-storage tank comprises a water supply pipe connected to a supply water use side through a pressure sensor and a check valve, and the water supply pipe and the pre-storage tank A water supply device comprising a pre-storage tank in which a branch pipe is connected to the water discharge pipe on the downstream side of the tank. 10. A water supply apparatus having a pre-storage tank according to claim 1, wherein the pre-storage tank comprises a plurality of storage tanks. 11. The pre-storage tank according to claim 10, wherein an electric valve or the like for selectively using the pre-storage tank is provided between a plurality of pre-storage tanks and a supply water use side. Water supply equipment.