JP6684360B2 - Water supply system and its container, booster pump, water supply method - Google Patents

Description

  The present invention relates to the field of water supply, and particularly to a water supply system and its container, a booster pump, and a water supply method.

  Non-negative pressure or non-negative pressure type pressure superimposition water supply device means a water supply technology that is directly connected in series to the water supply pipe network to pressurize, and the tank type non-negative pressure water supply device is a water storage tank between the water supply main and the water main. It is possible to increase the amount of stored water by connecting in parallel to the non-negative pressure water supply device.

  Initially, CN2437746 discloses a pressurized water supply apparatus having an opening or a closed sealing valve installed in a water storage container, and CN2438751 discloses "a vacuum regulator using a buoy, a floating ball, or a stainless ball as a switch at the entrance and exit. A controlled "pressurized stable water supply is disclosed.

  CJ / T254-2014 proposes a "limit pressure" in order to further secure the pressure of the water supply network.

  In the prior art, as intake and exhaust valves or vacuum breakers are widely used in public networks and water systems, the damage to the vacuum supply network is controlled. The water supply system should be developed to improve the water supply rate of the water supply system and to be suitable for the pressure and water volume supplied by the water supply network.

  Since the tank type non-negative pressure water supply device has a large amount of water storage, it secures the water supply for the water system and at the same time is suitable for the operating conditions of the public network. However, since the amount of water in the water storage tank is at normal pressure, there is a large pressure difference from the water supply pressure, and the storage time of water in the water storage tank is random due to changes in the amount of water used. Becomes complicated, and some advantages of non-negative pressure are lost.

  The present invention is to improve the tank type non-negative pressure water supply technology, and has the same action as the tank type non-negative pressure water supply device, but simplifies the connection between the water supply, the water storage, and the water supply device, and the operating parameters are continuous. And a container thereof, a booster pump, and a water supply method.

  In order to realize the object of the present invention, the following technical solutions are used. A water supply system, comprising a first water supply pipe, an intake valve, a container, a first pump, and a water pipe, the first water supply pipe is provided with an intake valve, and the container is a first water supply pipe and a water intake pipe of the first pump. The drainage pipe of the first pump is connected to the water pipe, the container is a pneumatic water tank, and the amount of compressed gas in the container is equal to the amount of air sucked by the intake valve breaking the vacuum. .

  The compressed gas in the container may be vacuum broken air or another clean gas such as filtered air or nitrogen gas.

  The intake valve may be installed at a location where the static pressure of the first water supply pipe is relatively low, and a plurality of intake valves may be installed.

  Preferably, the first water supply pipe is provided with a throttle pipe or a throttle plate between the intake valve and the container.

  According to the prior art, the intake valve may be an intake / exhaust valve, but may also be another device capable of intake when atmospheric pressure is reached, for example a vacuum breaker.

  The water content of the container includes the total amount of water stored in the water supply pipe behind the container and the intake valve.

  A pneumatic water tank connected between a first water supply pipe and a first pump, which is a container in which a first water level and a second water level are set, and in which the first water level is also called atmospheric pressure. Correspondingly, the second water level corresponds to the water pressure of the first water supply pipe. When the water level in the container is between the first water level and the second water level, it is in the pneumatic water storage mode, that is, the amount of water stored corresponds to a constant pressure.

  It is a pneumatic water tank connected between the first water supply pipe and the first pump, and is also used as a normal pressure water tank, that is, the amount of compressed gas in the container is normal pressure for only a part of the stored water amount. Alternatively, it is a container in which water is maintained at a pressure equal to or higher than normal pressure, and a minimum water level and a first water level are set, the first water level corresponds to atmospheric pressure, and the minimum water level is lower than the first water level. The container is in contact with the atmosphere at the first water level so as not to generate a negative pressure when using a water amount other than the stored water amount in the pneumatic water supply mode.

  The water storage amount between the minimum water level and the first water level corresponds to the water storage amount of the water storage tank in the tank-type non-negative pressure water supply device.

  The first water level is determined by the amount of compressed gas in the container.

  The communication with the atmosphere means that the intake valve installed in the first water supply pipe starts to intake air, and the intake / exhaust valve may be installed at the first water level.

  The communication with the atmosphere may communicate with another clean gas.

  The container is a pneumatic water tank connected between the first water supply pipe and the first pump, and is a container used as a normal pressure water tank. A swirl preventive device is provided at a drain port of the container.

  The pneumatic water tank is further used as a normal pressure water tank, and is also used as a pressure receiving water tank, that is, when the water storage container stores water under pressure, the interface between gas and water is in direct contact, Is connected to a pump and specifically includes a buffer tank (device) or a compensation tank (device) in a non-negative pressure water supply device according to the related art.

  As well as being used as a pneumatic water tank, the effect of the container used as a normal pressure water tank is to ensure hygiene and safety by keeping the water stored at normal pressure in a closed state during normal or non-use. is there. In particular, the concept of integrally designing the air pressure water storage and the atmospheric pressure water storage has the effect that the water storage amount and the operating pressure thereof are continuously and consistently maintained.

  The container referred to as a pneumatic water tank in the water supply system of the present invention is used as a pneumatic water tank and is also used as a normal pressure water tank, and not only has the amount of water stored under air pressure but also the amount of water stored under normal pressure. Including the container having.

  Further, the container in which the second water level is set may be further provided with a third water level, the third water level is higher than the second water level, and the second water level corresponds to the pressure of the water absorption pipe of the first pump, The third water level corresponds to the pressure of the drain pipe of the first pump.

  A booster pump including a first pump, a water absorption pipe of the first pump being connected to a container, and a drain pipe of the first pump being connected to a water pipe, further comprising a second pump, and a second pump being a first pump. It is connected in parallel with the water suction pipe of the pump. The structure in which the second pump is connected in parallel to the water suction pipe of the first pump includes a case where the second pump is connected in series to the first pump, but the second pump is connected in parallel to the drain pipe of the first pump. May be.

  The first pump or the second pump may be a single pump, or a set of pumps connected in parallel or in series.

  The booster pump is provided with a first conduit, a second conduit and a third conduit. The water intake pipe of the booster pump is provided with a third pipe line, the pipe line connected to the second pump of the first pump is provided with a second pipe line, and the third pipe line is connected to the second water supply pipe, The second conduit is connected to the container.

  The first pipe is provided with a first valve, the second pipe is provided with a second valve, the third pipe is provided with a third valve, and the first pipe, the second pipe and the third pipe are provided. The tract is connected to the container.

  The second pipeline and the third pipeline are connected to the second water supply pipe.

  A first pipeline is provided in the drainage pipe of the booster pump, and the first pipeline is connected to the container. The function of the pneumatic water tank is to maintain the pressure, that is, to stop the booster pump when it is unused or when the flow rate is too low, and when the amount of water in the water pipe suddenly changes, to supplement or balance the rapidly changing flow rate. In some cases, the operating state of the first pump may be stabilized. Regarding the rapid change in the flow rate, when the flow rate is large, the relative change width is small and the influence is small, and when the flow rate is small, the relative change width is large and the influence is large. When the container is connected to the water intake pipe of the booster pump, the water level in the container is low, which indicates that the resistance of the water main or water pipe is large and the flow rate is large, and the container is connected to the drain pipe of the booster pump. When connected, the resistance of the water supply pipe or the water pipe is small, indicating that the flow rate is small. According to these characteristics, the container connected to the water suction pipe side of the booster pump may be further used as a pneumatic water tank on the drain pipe side of the booster pump.

  The second pump may further include a third pump, and the third pump is connected in parallel to the water suction pipe of the second pump.

  In this way, the third pump may further be connected in parallel to the drain pipe of the first pump or the drain pipe of the second pump. The third pump is similar to the second pump.

  The effects of the booster pump are as follows. The water supply system can be operated in various modes, specifically, when the first valve is turned on, it becomes a non-negative pressure water supply device without a regulator composed of the first pump and the container, When it has a pump head and the second valve is turned on, it becomes a tank type non-negative pressure water supply device composed of the first pump and the container, the usage of the stored water increases, and the first valve and the second valve are successively connected. When it is turned on, it becomes a non-negative pressure water supply device without a regulating device composed of a second pump and a container, and when it has the head of the second pump and when the first valve and the third valve are turned on, a direct water supply system become. When such a diversified operating method is directly applied to the water supply system, energy saving is improved.

  The first advantage of non-negative pressure is to use a closed water storage method. When using the water storage, a vacuum regulator or an energy storage device is used. The present invention utilizes conventional vacuum breaking techniques for piping and the method used is to store and compress the vacuum broken gas using a pneumatic water tank as a container in the water supply system. This is one feature.

  The amount of gas that has broken the vacuum exhibits randomness due to the difference in the amount of water used. However, because the air sucked into the container last time does not generate a negative pressure when the amount of water used last time is reached again, dissolution, gas vortex, etc. consumes air or increases the amount of water used. , The vacuum-breaking intake valve comes to inhale again. This feature is reflected in that the amount of compressed gas in the container is equal to the amount of air drawn through the vacuum.

  In the present invention, it is preferable to break the vacuum and store and compress the sucked air because the amount of the gas that has broken the vacuum is random. Since the air drawn by breaking the vacuum is a gas that has already entered the water supply system, hygiene factors should be considered when taking vacuum breaking measures, although other methods may be used. When using another clean gas, it may be further connected to an intake valve or a container.

  When the first water supply pipe is protected from negative pressure generation, the pneumatic water storage pressure is continuously reduced to normal pressure, and when the water supply pipe is set to a pressure equal to or higher than the limit pressure, one throttle device is installed in the water supply pipe, It is necessary to maintain the water pressure in front of the throttle device above the limit pressure, and to secure the amount of water in the water pipe by using the sealed water storage after the throttle device. When the pressure drops to the level at which it occurs, the vacuum-breaking intake valve inhales.

  When the water supply pipe has a pressure equal to or higher than the limit pressure, the first water supply pipe is provided with throttle means between the intake valve and the container in order to stabilize the state of the intake valve.

  The pneumatic water tank has the advantage of stabilizing the pressure change of the system by the amount of water corresponding to the compressed gas, but has the disadvantage that the compressed gas occupies a part of the volume of the container. Based on the Boyle Marriott principle, the ratio of water storage to the total volume of the container can be calculated when using the method of the invention. When the limit pressure is 0.1 MPa, the stored water amount is 50%, and when the limit pressure is 0.2 MPa, the stored water amount is 67%, and the water storage efficiency is improved as compared with a general pneumatic water tank. The volume other than the stored water volume may be occupied by the gas, and the volume of this portion may be further reduced.

  The second feature of the present invention is to add the water storage amount corresponding to the water storage amount of the water storage tank in the tank type non-negative pressure water supply device and the pneumatic water storage amount generated when compressing the gas whose vacuum is broken. is there. The volume of the pneumatic water tank according to the first feature increases, and the amount of stored water used at normal pressure is stored. Adding water in this way not only solves the problem of the water storage time of the container, but also stores atmospheric pressure water in a sealed state, thus improving hygiene and operating the device. The control steps therein are simplified, and the added water volume causes a continuous change in pressure during operation, which helps stabilize the operation of the device and has a series of beneficial effects.

  The amount of water stored between the second water level and the first water level in the container is intended to maintain the continuity of drainage pressure. The amount of water stored between the second water level and the minimum water level in the container is the total amount of water storage that meets the demand for the water pipe.

  Compared with the prior art, the first water supply pipe and container for water storage of the present invention corresponds to changing the shape of the stabilization tank or the compensation tank in the prior art, and one of the effects is that the water level of the container is When it is lower than the high point of the 1 water pipe, the negative pressure caused by the "non-negative pressure" of the container on the high pressure of the 1st water pipe is eliminated, and the stored water amount of the 1st water pipe is increased to It is to turn it into an advantage. Other than that, in this method, the action of air pressure is maintained, a corresponding pressure is generated in the water connected by the interface in the pneumatic tank, and the pressure of the stored water is continuously reduced by the compressed gas, and the stored gas is stored as the total gas amount. It has the effect of maintaining a negative pressure so that even if a part of the amount is used, negative pressure is not generated. Specifically, when the non-negative pressure or the limit pressure of the water supply pipe is maintained, the gas pressure effectively acts on a part of the stored water amount, and the pressure of the other part of the stored water amount is continuously reduced by the total gas amount. When the negative pressure is generated, the intake valve for vacuum breaking starts to inhale.

  In the prior art, there have been many studies on the phenomenon of gas vortex at the drainage port under normal pressure condition, and the vortex shedding plate or swirling flow prevention device that has been put to practical use is used in a water storage tank (or pool) with the drainage port and the minimum water level It is used to increase the effective water depth by decreasing the difference in water pressure, but such technology has not yet been applied to non-negative pressure water supply devices. In particular, due to the first characteristic of the non-negative pressure water supply device in which the container is connected to the pump, cavitation easily occurs in the pump due to the gas mixed in the water. Therefore, the present invention proposes a means for adding an eddy current prevention device to a pneumatic water tank which is in direct contact with the interface of gas and water, based on the phenomenon described in Article 3.4.13 of GB50015-2003 (2009 edition). ing. The pneumatic water tank is further used as a normal pressure water tank and a pressurized water storage container, and is connected to a pump. By the above means, the influence of the gas vortex on the pump by the container is eliminated.

  The swirl preventive device may be a horizontal circular baffle provided at the drainage port of the container, and makes the velocity of the water flow flowing through the cross section of the circular baffle lower than the velocity of the water flow at the water intake port. A vertical plate may be further provided between the bottom of the circular baffle and the wall of the container along the water flow direction.

  When the minimum water level is set in the container of the present invention, when the container is at the first water level, vacuum breaking or suction means is required, and when replenishing the stored water amount between the first water level and the minimum water level, The container needs exhaust means. The vacuum breaking or suction means used for the container can be above or below the first water level. The exhaust means of the container corresponds to the first water level and may take automatic control means, for example, a signal controls the opening and closing of the exhaust valve.

  At the same time, the first water pipe is preferably connected to the first water level. The first water supply pipe has a role of replenishing gas when the vacuum is broken, but the direction of exhaust is opposite to the direction of water supply.

  Since the water pressure of the first water supply pipe changes randomly, when the water pressure of the second water level corresponds to the limit pressure of the first water supply pipe, the water level corresponding to the highest pressure of the water supply pipe is the highest water level. The highest water level is located above the second water level, and the stored water amount between the highest water level and the second water level is the first water supply when the pressure of the first water supply pipe of the present invention is above the limit pressure but the pressure drops. It is the difference in the amount of water between the pipe and the water pipe, plays a role of reducing the amount of water supply when the pressure of the first water pipe or the public pipe network decreases, and helps maintain the pressure of the water pipe or the public pipe network.

  The second water level further corresponds to the pressure in the water intake pipe of the booster pump. Further, the compressed gas in the container is fully utilized, that is, the second feature of the present invention is that the container is provided with a third water level, and the third water level corresponds to the pressure of the drain pipe of the booster pump. Including further. This is equivalent to adding up the amount of water in the pneumatic water tank arranged in the inverter pump. In this way, the system is provided with only one or only one set of containers, whereby the container is connected not only to the suction pipe of the booster pump but also to the drain pipe of the booster pump, so that There is a problem in that it is necessary to shift the time zones according to changes in pressure and connect to different pipelines.

  There is an additional starting water level between the second water level and the third water level. The starting water level corresponds to the low pressure that the drain pipe of the desired booster pump may have, because the resistance of the pipe decreases when the amount of water in the water pipe system is smaller. When the starting water level is lower than the maximum water level, water may be supplied by the direct water supply method.

  In the direct water supply area of an existing building, if the difference between the pressure corresponding to the third water level and the pressure corresponding to the second water level is smaller, the starting water level is often lower than the highest water level. When the present invention solves the problem of insufficient pressure in the direct water supply area of an existing building, it does not adversely affect the water supply main. Therefore, by using the present invention, the existing water supply main or public pipe It is also possible to promote full utilization of the water pressure of the net.

  When the starting water level is higher than the highest water level, the amount of water between the starting water level and the highest water level or the second water level can reduce the booster pump lift, but also restrict the water supply of the water supply pipe.

  A method of operating a booster pump, wherein the second line of the booster pump is connected to the container. The first pressurization of the second water supply pipe by the second pump increases the pressure in the container, thereby increasing the amount of water stored in the container and, at the same time, continuously supplying water to the second water supply pipe and its action. The method further includes increasing the use of the water supply amount of the second water pipe during the water valley and decreasing the use of the water supply amount of the second water pipe during the peak time of the water, and thus performing the function of the peak load shift. .

  Since the container of the present invention includes the pneumatic water storage system in the case of the atmospheric pressure water storage amount, the pressure of the second water supply pipe can be fully utilized and energy saving is possible. In the pneumatic water storage system, the atmospheric water storage system is used. The amount of water is included, and the advantage is that the amount of compressed air is reduced to increase the volume of stored water and the hygiene of the atmospheric pressure stored water is ensured, and the atmospheric pressure water and pneumatic pressure water It is also about eliminating the consideration for the cycle.

  Correspondingly, the continuous change in pressure in the container helps stabilize the operation of the pump. However, if the change width of the pressure is too large, the range of the speed variation rate is too wide, and the operation efficiency of the pump is reduced. Therefore, using booster pumps connected in series can save energy.

  When using booster pumps connected in series, there is a problem of how to control them effectively.

  A third feature of the present invention is that when the container is connected to the first or third line of the booster pump, the first pump is controlled to maintain the drainage pipe of the first pump at a constant pressure, The two pumps are controlled to maintain a constant pressure in the drain pipe of the second pump. Further, the second pump may operate at a set frequency or higher, and if the drain pressure of the second pump is higher than a certain set value, the second pump ends the operation.

  The second pump secures the pressure of the water suction pipe of the first pump, and when the pressure of the drain pipe of the second pump is higher than a certain set value, the pressure head of the first pump is too small, and the first pump is affected by the speed fluctuation rate. Operates with low efficiency.

  A fourth aspect of the present invention is that when the container is connected to the second line of the booster pump, the first pump is still controlled by the pressure of the drain and the second pump responds to the pressure of the drain of the second pump. A frequency conversion range of a certain width is set, and then the frequency is determined by the pressure of the water absorption pipe of the second pump. When the pressure of the water absorption pipe of the second pump is low, the frequency conversion range of the certain width is relatively set. It operates at a low frequency and, at high pressure, at a relatively high frequency.

  Based on the characteristic curve of the pump, when the second pump operates at the pressure of the equilibrium container and the pressure of the second water supply pipe is high, the flow rate of the second pump is large, and when the pressure is low, the flow rate of the second pump is small.

  A fourth feature is a pump control method, wherein one frequency conversion range is set based on a first parameter point, and a specific frequency conversion frequency is determined based on a second parameter point. Is determined by the characteristic curve of the pump and regulates the flow rate and head.

  Any one of the above features can also be used independently.

  In the prior art, CECS 211-2012 Article 5.0.6 stipulates that the stabilizing tank water volume is greater than or equal to the design flow rate per minute, which is CJ / T 254-2014 5.4. Equivalent to that specified in Article 3.1 and smaller than the pump well volume (3 minutes) of the pump in GB 50015-2003 (2009 edition) Article 3.7.4. It is necessary to use an anti-vortex device on the vessel because the vacuum regulator is activated and the pump operates at the designed flow rate during peak water usage and these elements are more likely to complement each other.

  CECS 211-2012 Article 5.0.6 stipulates that the volume of a tank type non-negative pressure lower water storage tank is the maximum flow rate per hour of 1 hour to 2 hours, and GB 50015-2003 (2009). (Year version) It is close to the water adjustment amount or effective volume (20% of daily water amount is the maximum flow rate per hour in about 2 hours) in Article 3.7.2 or 3.7.3.

  The applicant of the present invention has traced a plurality of cases of using a water storage tank in an area where the non-negative pressure water supply device is highly used, and found that the safe water storage amount is too large. It is that the requirements in GB 50974-2014 Article 5.1.13 were not emphasized in the previous GB 50015-2003 (2009 edition) Article 3.8.6, and as a representative example, a sidewall outlet was used. It may lead to the phenomenon that the water tank does not take any measures.

  Carefully, a magnetic flap level gauge can be used to continuously record changes in water level in existing water storage tanks.

FIG. 1 is a diagram showing a water supply system. FIG. 2 is a diagram showing a water supply system of the present invention. FIG. 3 is a diagram showing the water level in the container of the present invention. FIG. 4 is a view showing a container provided with an eddy current prevention device. FIG. 5 is a view showing a connecting pipe line of the booster pump of the present invention. FIG. 6 is a view showing a connecting pipe line of the booster pump of the present invention. FIG. 7 is a view showing a connecting pipe line of the booster pump of the present invention. FIG. 8 is a diagram for analyzing the present invention. FIG. 9 is a diagram for analyzing the present invention.

  FIG. 1 shows a water supply system, which is composed of a first water supply pipe 2, an intake valve 1, a container 3, a first pump 4, and a water pipe 5. Furthermore, the second water supply pipe 6 and the second pump 10 are provided, the first valve 7, the second valve 8 and the third valve 9 are further provided, and further, the water supply main pipe 11 and the pipe line 12 connected to the container 3 are provided. Equipped with.

  The first water supply pipe 2 and the second water supply pipe 6 are connected to the water supply main pipe 11, and the first water supply pipe 2 and the second water supply pipe 6 are provided with open / close valves, respectively. An intake valve 1 is provided at a high point of a pipeline of the water supply main pipe 11 or the first water supply pipe 2 or the second water supply pipe 6, and one intake valve is further provided on the front side of the backflow prevention device. Prevent negative pressure from being generated in the main pipe 11. The first water supply pipe 2 is connected to the container 3, the container 3 is connected to the water absorption pipe of the first pump 4, and the drainage pipe of the first pump 4 is connected to the water pipe 5.

  Usually, water enters the container 3 through the water supply main pipe 11 and the first water supply pipe 2, and the water in the container 3 is pressurized and supplied to the water pipe 5 by the first pump 4.

  It has been shown that when the water pressure of the water supply main 11 decreases, the flow rate of the pipeline or public network connected to the water supply main 11 increases and the resistance increases. As a result, the water pressure of the water supply main 11 increases. The water pressure in the container 3 decreases, the gas in the container 3 expands accordingly, the amount of stored water decreases, and the decreased amount of stored water is replenished as the amount of water in the water pipe 5, thus, It serves to reduce the water supply, reduce the flow in the public network, reduce the resistance and maintain the water supply pressure.

  If the amount of water supplied to the main water supply further decreases until it corresponds to the limit pressure, the main water supply 11 stops supplying water, and at this time, the water level in the container 3 corresponds to the second water level. The water storage amount from the second water level to the first water level in the container 3 is continuously replenished as the water amount of the water pipe 5, and the intake valve 1 installed in the first water supply pipe 2 according to the expansion of the gas in the container 3 The pressure decreases continuously until the air is taken. When the lowest water level is further set in the container, the intake air is replenished in the container 3, and the stored water amount from the first water level to the lowest water level in the container 3 is continuously replenished as the water amount in the water pipe 5. It corresponds to the water supply state of the water storage tank of the tank type non-negative pressure water supply device.

  When the water supply amount of the water supply main 11 decreases or the water pressure decreases to the limit pressure, the second water supply pipe 6 is closed, and when the water level in the container 3 is equal to or lower than the second water level, the third valve 9 is turned on. It is possible to connect the container 3 to the water suction pipe of the first pump and to the water suction pipe of the second pump 10, thus increasing the water supply head at any time.

  When the water pressure of the water supply main 11 is high and the amount of water supply is sufficient and the container 3 corresponds to the maximum water level, the first water supply pipe 2 is closed and the second water supply pipe 6 is connected to the water intake pipe of the first pump 4. Alternatively, the first valve 7 can be turned on to connect the container 3 to the drain of the first pump 4, in which case the container 3 is used as a pneumatic water tank for the first pump 4. It corresponds to a non-negative pressure water supply device without a regulator.

  If the water pressure of the water main 11 is higher than the pressure required for the water pipe 5, the first valve 7 and the third valve 9 are turned on one after the other, and the second water pipe is connected to the water pipe 5, thereby directly Configure a water supply system.

  FIG. 2 illustrates the water supply system of the present invention, which is a basic water supply system configuration. A first water supply pipe 2, an intake valve 1, a container 3, a first pump 4, and a water pipe 5 in FIG. 1 are provided. Furthermore, the pneumatic water tank 13 of the first pump 4 is provided.

  The action of the pneumatic water tank 13 is to maintain the pressure, that is, to stop the first pump 4 when it is unused or when the flow rate is too small, and when the amount of water in the water pipe 5 suddenly changes, the flow rate that changes abruptly. May be supplemented or balanced to stabilize the operating state of the first pump. The sudden change in the flow rate has a small relative change width and a small influence when the flow rate is large, and has a large relative change width and a large influence when the flow rate is small. In FIG. 1, when the container 3 is connected to the water suction pipe of the booster pump 4 (or the second pump 10; the same applies hereinafter), the water level of the container 3 is low and is below the maximum water level, which is the water supply main 11 Or, the resistance of the water pipe 5 is large, indicating that the flow rate is large, and when the container 3 is connected to the drain pipe of the booster pump 4, it is above the maximum water level, which is the resistance of the water supply pipe 2 or the water pipe 5. Is small, indicating that the flow rate is small, which is consistent with the characteristic that the flow rate changes abruptly.

  FIG. 3 shows the water level in the container 3 of the present invention. The first water level 101 and the second water level 102 are set. The first water supply pipe 2 is connected so as to correspond to the height of the first water level 101, and an exhaust valve 14 is further provided. The container 3 is further provided with a drainage pipe 17. The lowest water level 104 is further set below the first water level 101, and the third water level 103 is further set above the second water level 102. Between the second water level 102 and the third water level 103, there is a maximum water level 105 and a starting water level 106.

  The first water level 101 is normal pressure, the second water level 102 is the limit pressure of the first water supply pipe 2, the highest water level 105 is the highest pressure of the first water supply pipe 2, and the starting water level 106 is the minimum water supply pressure of the water pipe. The second water level further corresponds to the pressure of the feed pipe of the booster pump, the third water level 103 corresponds to the pressure of the drain pipe of the booster pump, which corresponds to the starting pressure. The maximum water level 105 is the water level when the flow rate of the water supply network decreases and the resistance decreases, and the starting water level 106 is the water level when the flow rate of the water supply network decreases and the resistance decreases. When the maximum water level 105 is higher than the starting water level 106 and thus higher than the third water level 103, a direct water supply system may be used for water supply.

  Preferably, the first water supply pipe 2 is connected to the height of the first water level 101, but it may be connected to the height of the first water level 101 or higher. When the first water pipe 2 is connected to the maximum water level 105 or higher, when the actual water level is higher than the maximum water level 105, as described above, the first water pipe 2 is in the closed state and the actual water level is higher than the maximum water level 105. When the temperature is low, the first water supply pipe 2 is provided in the water supply main pipe 11 so as to communicate with the gas in the container 3 and obtain the permission of the water supply engine, and also to reduce the resistance of the pipe and fully utilize the water supply pressure. The backflow prevention device can be omitted.

  Further, the exhaust valve 15 may be installed above the height of the exhaust valve 14, and the exhaust valve 16 may be installed below the height of the exhaust valve 14. The purpose of installing the exhaust valve 15 and the exhaust valve 16 is to adjust the amount of compressed gas in the container, that is, to adjust the installation height of the first water level A1. Turning on the valve of the exhaust valve 15 corresponds to reducing the amount of compressed air, and turning on the valve of the exhaust valve 16 corresponds to increasing the amount of compressed air. If the first water level is provided at the height of the exhaust valve 15 or the exhaust valve 16, the height of the second water level, the third water level and the corresponding amount of stored water change correspondingly, but the corresponding pressure does not change.

  Reducing the amount of compressed air is equivalent to increasing the amount of water stored in the water tank of the tank-type non-negative pressure water supply device, and increasing the amount of compressed air is the amount of water storage in the water tank of the tank-type non-negative pressure water supply device. Is equivalent to decreasing. Thus, the container of the present invention can further adjust the amount of stored water with respect to a predetermined volume.

  The exhaust valve 14, the exhaust valve 15, and the exhaust valve 16 may be conventional ones or intake / exhaust valves.

  FIG. 4 shows a container, which is a pneumatic water tank, is used as a normal pressure water tank, and is provided with a swirl preventive device 18 in the container connected to the drain pipe 17.

  FIG. 5 is the first drawing of the connecting line of the booster pump of the present invention. The second pump 10 is connected in parallel to the water suction pipe 19 of the first pump 4, and the check valve 21 which is a bypass pipe of the second pump 10 is provided in the pipeline connected in parallel to the second pump 10. . The second pump 10 may be further connected in parallel to the drain pipe 20 of the first pump 4.

  FIG. 6 is a second drawing of the connecting line of the booster pump of the present invention. The first pipe line 22 is connected to the drain pipe 20 of the first pump 4, and the first pipe line 22 is provided with the first valve 7. The second pipe 23 and the water suction pipe 19 of the first pump 4 are connected to one side of the drain pipe of the second pump 10, and the second pipe 23 is provided with the second valve 8. The third pipe line 24 is connected to the water suction pipe of the second pump 10, and the third pipe line 24 is provided with a third valve 9. The first conduit 22, the second conduit 23, and the third conduit 24 are connected to the conduit 12. The check valve 21 is provided in the bypass pipe of the second pump 10.

  FIG. 7 is a third drawing of the connecting line of the booster pump of the present invention. The water suction pipe of the second pump 10 may be further connected in parallel to the third pump 27, and the first pipe line 22, the second pipe line 23, the third pipe line 24 and the pipe line may be further connected to each pressure portion of the connection pipe line. 26 may be provided.

  5 to 7, the second pump 10 is connected to the drain pipe 20 of the first pump 4, or the third pump 27 is connected to the drain pipe 20 of the first pump 4 or the drain pipe of the second pump 10. Since the above can be realized by those skilled in the art based on the above concept, detailed description thereof will be omitted.

  FIG. 8 is the first drawing for analyzing the present invention. As can be seen from FIG. 8, in the present invention, the water storage volume composed of the first water supply pipe 2 and the container 3 forms the high point of two systems, but further forms the high point of two or more systems. Good. In the water flow direction, the intake valve 1 is provided at the high point of the first system, and the high point of the other system forms a volume for storing and compressing gas. When the amount of water stored in the container is used, the intake valve 1 inhales, and when the stored water below the first water level is replenished, it is exhausted from the exhaust valve 14. The intake valve 1 is installed at a high point of the pipeline, and an intake / exhaust valve may be used so as to discharge a gas other than the gas generated at the time of breaking the vacuum in the pipe. An intake / exhaust valve may be used so as to replenish the intake amount when using the stored water.

  The high point of the system is the point where the static pressure is relatively low or where the gas is concentrated. The high point of the other system may be connected to a conduit to balance the water level at the first water level.

  It is easy to make the first water pipe 2 form the high point of the first system.

  FIG. 9 is a second drawing for analyzing the present invention. Since the pressure of the container 3 corresponds to the water pressure of the first water supply pipe 2, the first water supply pipe 2 is in the water supply state when the exhaust valve 14 exhausts or when the compressed gas in the container 3 increases the pressure, The direction is opposite to the exhaust direction. On the other hand, when the first water supply pipe 2 is connected to the gas concentration point in the container 3 in the stationary state, the gas cutoff means should be taken. Alternatively, the exhaust function of the intake valve 1 is eliminated, or the gas shutoff device 28 is installed outside the container, or the gas shutoff device 29 is installed inside the container.

  As described above, the water supply system of the present invention, the container thereof, and the booster pump are the basic forms of the concept of the present invention, and any improvement including the water supply method is included in the protection scope of the present invention.

Claims (10)

A water supply system comprising a first water supply pipe, a container, a first pump, and a water pipe, the container being connected between the first water supply pipe and the water intake pipe of the first pump, and the drain pipe of the first pump being used. Connected to a water pipe,
A first water level and a second water level are set in the container, the first water level corresponds to the atmospheric pressure, the second water level corresponds to the water pressure of the first water supply pipe, and the stored water level is the first water level and the second water level. A water supply system characterized by storing water by gas pressure when it is between the water level and the water level. Further, an intake valve is provided, the intake valve is provided in the first water supply pipe, and when the intake valve is opened, gas is compressed in the container, and the amount of gas compressed in the container is the intake gas. The water supply system according to claim 1, wherein the valve is equal to the amount of air sucked from the outside of the container . The container is further set with a third water level higher than the second water level,
The second water level corresponds to the pressure of the suction pipe of the first pump,
The water supply system according to claim 1, wherein the third water level corresponds to the pressure of the drain pipe of the first pump. The lowest water level lower than the first water level is set, and the stored water volume from the first water level to the lowest water level in the container is continuously replenished as the water volume of the water pipe, and the stored water level is the first water level and the lowest water level. The water supply system according to any one of claims 1 to 3, wherein the water is stored at a constant pressure when the water supply is in between. The water supply system according to any one of claims 1 to 4, wherein a swirl preventive device is provided at a drain port of the container. Further comprising a second pump, the second pump is a water supply system according to any one of claims 1-5, characterized in that that will be connected in parallel to the suction pipe of the first pump.   The suction pipeline of the second pump is provided with a third pipeline, the first pump is provided with a second pipeline in the pipeline connected to the second pump, and the third pipeline is connected with the second suction pipeline. The water supply system according to claim 6, wherein a second pipeline is connected to the container.   The water supply system according to claim 6, wherein the drainage pipeline of the first pump is provided with a first pipeline, and the first pipeline is connected to the container. The first pump is controlled to maintain the drain pipe of the first pump at a constant pressure, the second pump is controlled to maintain the drain pipe of the second pump at a constant pressure, and the second pump is equal to or higher than a set frequency. The water supply system according to claim 6, wherein the water supply system according to claim 6, wherein the drainage pipe pressure of the second pump is higher than a certain set value, the operation is terminated. The control method of the first pump and the second pump sets one frequency conversion range based on the first parameter point, determines a specific frequency conversion frequency based on the second parameter point, and the frequency conversion range is The water supply system according to claim 6, wherein the flow rate and the head are adjusted by the characteristic curve of the pump.

Images