CN114809200B - Non-negative pressure water supply equipment and water supply method - Google Patents
Non-negative pressure water supply equipment and water supply method Download PDFInfo
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- CN114809200B CN114809200B CN202210673141.4A CN202210673141A CN114809200B CN 114809200 B CN114809200 B CN 114809200B CN 202210673141 A CN202210673141 A CN 202210673141A CN 114809200 B CN114809200 B CN 114809200B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 578
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 69
- 230000001105 regulatory effect Effects 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims description 26
- 238000004146 energy storage Methods 0.000 claims description 17
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- 239000008400 supply water Substances 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/02—Arrangements or adaptations of tanks for water supply for domestic or like local water supply
- E03B11/06—Arrangements or adaptations of tanks for water supply for domestic or like local water supply with air regulators
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/02—Public or like main pipe systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/075—Arrangement of devices for control of pressure or flow rate
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/08—Arrangement of draining devices, e.g. manual shut-off valves
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/09—Component parts or accessories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The invention provides a non-negative pressure water supply device and a water supply method, wherein the non-negative pressure water supply device comprises a water inlet pipe, a steady flow tank, an outflow pipe, a water pump water inlet main pipe, a frequency conversion unit, a water pump water outlet main pipe and a water supply pipe which are connected in sequence; a water inlet branch pipe is connected between the water inlet pipe and the water inlet main pipe of the water pump, and a first electromagnetic valve is arranged on the water inlet branch pipe; the outflow pipe is provided with a second electromagnetic valve; the high-pressure tank with large volume and small flow is also provided with a first energy accumulator; a water inlet pipe and a water outlet pipe are connected between the water supply pipe and the large-volume small-flow high-pressure tank, a pressure reducing valve and a flow regulating valve are arranged on the water outlet pipe, and a booster pump, a first check valve and a first butterfly valve are arranged on the water inlet pipe. The non-negative-pressure water supply equipment and the water supply method provided by the invention can continuously supply water to a user pipe network, and ensure the water supply quality.
Description
Technical Field
The invention belongs to the technical field of municipal water supply, and particularly relates to non-negative-pressure water supply equipment and a water supply method.
Background
Secondary pressurization water supply equipment is more and more applied to high-rise water supply, and no negative pressure water supply equipment adopts the stationary flow jar structure alone basically, comes to be in the series connection mode between municipal water, the stationary flow jar and the water pump and pressurizes the water supply. When the water consumption is peak, municipal water supply is less than the water consumption of users, the water supply flow may not meet the use requirements of the users, and the water stored in the steady flow tank may not meet the requirements of the users.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the non-negative pressure water supply equipment and the water supply method can continuously supply water to a user pipe network and ensure the water supply quality.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
on one hand, the embodiment of the invention provides a non-negative pressure water supply device, which comprises a water inlet pipe, a flow stabilizing tank, an outflow pipe, a water pump water inlet main pipe, a frequency conversion unit, a water pump water outlet main pipe and a water supply pipe which are connected in sequence; a water inlet branch pipe is also connected between the water inlet pipe and the water inlet main pipe of the water pump, and a first electromagnetic valve is arranged on the water inlet branch pipe; a second electromagnetic valve is arranged on the outflow pipe; the high-pressure tank with the large volume and the small flow is also provided with a first energy storage device; the pressure reducing valve and the flow regulating valve are arranged on the water outlet pipe, and the booster pump, the first check valve and the first butterfly valve are arranged on the water inlet pipe.
As a further improvement of the embodiment of the invention, a liquid level sensor for measuring the liquid level height in the flow stabilizing tank is arranged in the flow stabilizing tank.
As a further improvement of the embodiment of the invention, a straight pipeline is connected between the water inlet main pipe of the water pump and the water outlet main pipe of the water pump, and the straight pipeline is connected with the frequency conversion unit in parallel; the straight-through pipeline is provided with a second check valve and a second butterfly valve, a second energy storage device is arranged between the second check valve and the second butterfly valve, and an air bag filled with gas is arranged in the second energy storage device.
As a further improvement of the embodiment of the invention, a vacuum suppressor is arranged on the steady flow tank.
As a further improvement of the embodiment of the invention, a first pressure sensor is arranged on the water inlet pipe.
As a further improvement of the embodiment of the invention, the frequency conversion unit comprises 2-3 groups of frequency conversion water pump units, and the frequency conversion water pump units are arranged between the water pump water inlet main pipe and the water pump water outlet main pipe in parallel.
As a further improvement of the embodiment of the invention, the variable frequency water pump unit comprises a water pipe, and a variable frequency water pump, a third check valve and a third butterfly valve which are sequentially arranged on the water pipe, wherein the variable frequency water pump is connected with a water inlet main pipe of the water pump, and the third butterfly valve is connected with a water outlet main pipe of the water pump.
As a further improvement of the embodiment of the invention, a fourth butterfly valve is further arranged on the water pipe and is positioned between the variable-frequency water pump and the water inlet main pipe of the water pump.
On the other hand, the embodiment of the invention provides a water supply method, which adopts the non-negative pressure water supply equipment; the water supply method includes the steps of:
step 10), opening a second electromagnetic valve, wherein the first electromagnetic valve and the flow regulating valve are both in a closed state; municipal incoming water enters the flow stabilizing tank through the water inlet pipe until the water pressure in the flow stabilizing tank reaches a second set pressure;
step 20) starting the frequency conversion unit and the booster pump, and opening a first butterfly valve on the water inlet pipe; municipal incoming water flows into a water supply pipe through a water inlet pipe, a steady flow tank, an outflow pipe, a water inlet main pipe of a water pump, a frequency conversion unit and a water outlet main pipe of the water pump in sequence; one part of water in the water supply pipe flows to a user pipe network, the other part of water is pressurized by a booster pump through a water inlet pipe and then is conveyed into the large-volume small-flow high-pressure tank until the pressure of the large-volume small-flow high-pressure tank reaches a first set pressure, the booster pump is stopped, and a first butterfly valve is closed; all water in the water supply pipe flows to a user pipe network;
step 30), when the water supply flow of municipal incoming water is lower than the water supply requirement of a user pipe network, the liquid level in the steady flow tank gradually drops, and when the liquid level in the steady flow tank drops to the set lowest liquid level, the first electromagnetic valve and the flow regulating valve are opened, and the second electromagnetic valve is closed; a small part of water in the water inlet pipe enters the flow stabilizing tank, and a large part of water enters the water inlet main pipe of the water pump through the water inlet branch pipe, and then enters the water supply pipe through the water outlet main pipe of the water pump by pressurization of the frequency conversion unit and flows to a user pipe network; water in the large-volume small-flow high-pressure tank enters a water supply pipe through a water outlet pipe according to a first set flow and flows to a user pipe network; at the moment, the large-volume small-flow high-pressure tank is used as a main water supply source, and the frequency conversion unit is used as an auxiliary water supply source according to the principle of how much difference is compensated;
step 40), continuously increasing water in the flow stabilizing tank, continuously increasing the liquid level, reducing the opening degree of the flow regulating valve when the flow stabilizing tank is filled with water, opening a first butterfly valve, and starting the booster pump; most of water in the water inlet pipe enters a water inlet main pipe of the water pump through a water inlet branch pipe, and then enters a water supply pipe through a water outlet main pipe of the water pump after being pressurized by a frequency conversion unit; one part of water in the water supply pipe is pressurized by the booster pump through the water inlet pipe and then is conveyed into the high-pressure tank with large volume and small flow, and the other part of water directly flows to a user pipe network; the water in the large-volume small-flow high-pressure tank enters a water supply pipe through a water outlet pipe according to a second set flow and flows to a user pipe network, and the second set flow is smaller than the first set flow; at the moment, the large-volume small-flow high-pressure tank is used as an auxiliary water supply source, and the frequency conversion unit is used as a main water supply source according to the principle of how much difference is compensated;
step 50), continuously increasing the pressure in the steady flow tank, reducing the opening degree of the flow regulating valve when the pressure in the steady flow tank reaches a second set pressure, opening the second electromagnetic valve, and closing the first electromagnetic valve; municipal incoming water flows into a water supply pipe through a water inlet pipe, a steady flow tank, an outflow pipe, a water pump water inlet header pipe, a frequency conversion unit and a water pump water outlet header pipe in sequence; one part of water in the water supply pipe flows to a user pipe network, and the other part of water is pressurized by the booster pump through the water inlet pipe and then is conveyed into the high-pressure tank with large volume and small flow; the water in the large-volume small-flow high-pressure tank enters a water supply pipe through a water outlet pipe according to a third set flow and flows to a user pipe network, and the third set flow is smaller than the second set flow; at the moment, the frequency conversion unit is used as a main water supply source according to the principle of how much difference is compensated, and the large-volume small-flow high-pressure tank is used as an auxiliary water supply source;
step 60) when the pressure in the large-volume small-flow high-pressure tank reaches a first set pressure, closing the flow regulating valve, the booster pump and the first butterfly valve; municipal water flows into the delivery pipe and flows to the user pipe network through water pipe, stationary flow jar, outlet pipe, water pump inlet manifold, frequency conversion unit and water pump outlet manifold in proper order.
As a further improvement of the embodiment of the present invention, the method further includes:
and step 70) when the water consumption of the user pipe network at night is reduced, closing the frequency conversion unit, opening the flow regulating valve, and allowing the water in the large-volume small-flow high-pressure tank to enter a water supply pipe through a water outlet pipe according to a fourth set flow and flow to the user pipe network.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: according to the non-negative-pressure water supply equipment and the water supply method, when the municipal water supply is less than the water consumption of a user, the water supply mode is switched from the series mode to the parallel mode through the water inlet branch pipe and the large-volume small-flow high-pressure tank, so that water can be supplied to a user pipe network continuously, and the water supply quality is guaranteed.
Drawings
Fig. 1 is a schematic structural view of a non-negative pressure water supply apparatus according to an embodiment of the present invention.
The figure shows that: the device comprises a water inlet pipe 1, a first pressure sensor 2, a water inlet branch pipe 3, a first electromagnetic valve 4, a steady flow tank 5, a liquid level sensor 6, a vacuum suppressor 7, a second electromagnetic valve 8, a large-volume small-flow high-pressure tank 9, a first energy storage 91, a flow regulating valve 10, a booster pump 11, a water supply pipe 12, a second energy storage 13, a third butterfly valve 14, a third check valve 15, a variable-frequency water pump 16, a fourth butterfly valve 17, an outflow pipe 18 and a pressure reducing valve 19.
Detailed Description
The technical scheme of the invention is explained in detail in the following with reference to the attached drawings.
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
The embodiment of the invention provides negative-pressure-free water supply equipment, which comprises a water inlet pipe 1, a steady flow tank 5, an outlet pipe 18, a water pump inlet main pipe, a frequency conversion unit, a water pump outlet main pipe and a water supply pipe 12, wherein the water inlet of the water inlet pipe 1 is connected with a municipal water supply pipe network, the water outlet of the water inlet pipe 1 is connected with the water inlet of the steady flow tank 5, the water outlet of the steady flow tank 5 is connected with the water inlet of the frequency conversion unit through the outlet pipe 18 and the water pump inlet main pipe in sequence, the water outlet of the frequency conversion unit is connected with the water inlet of the water supply pipe 12 through the water pump outlet main pipe, and the water outlet of the water supply pipe 12 is connected with a user pipe network as shown in figure 1. Still be connected with into water branch pipe 3 between water pipe 1 and the water pump water inlet main pipe, the water inlet of water branch pipe 3 is connected with water pipe 1, and the delivery port of water branch pipe 3 is connected with the water pump water inlet main pipe. The water inlet branch pipe 3 is provided with a first electromagnetic valve 4 for controlling the on-off of the water inlet branch pipe 3. The outflow pipe 18 is provided with a second electromagnetic valve 8 for controlling the on-off of the outflow pipe 18.
The non-negative-pressure water supply equipment provided by the embodiment of the invention further comprises a large-volume small-flow high-pressure tank 9, wherein a first energy storage 91 is arranged in the large-volume small-flow high-pressure tank 9, gas with certain pressure is filled in the first energy storage 91, and an exhaust valve is further arranged on the energy storage 91. An inlet pipe and an outlet pipe are connected between the water supply pipe 12 and the large-volume small-flow high-pressure tank 9, a pressure reducing valve 19 and a flow regulating valve 10 are arranged on the outlet pipe, and a booster pump 11, a first check valve and a first butterfly valve are arranged on the inlet pipe. Wherein, if open booster pump 11 and first butterfly valve, the water that gets into in the delivery pipe 12 from the frequency conversion unit inputs into big volume low discharge high-pressure tank 9 after the inlet tube passes through booster pump 11 pressurization, constantly extrudees energy storage 91, and the gas in the energy storage 91 is discharged through the discharge valve, and the pressure in big volume low discharge high-pressure tank 9 constantly increases. If the flow regulating valve 10 is opened, the high-pressure water in the large-volume small-flow high-pressure tank 9 is decompressed through the pressure reducing valve 19 by the water outlet pipe, and the flow is controlled by the flow regulating valve 10, then flows into the water supply pipe 12 and flows to the user pipe network. Preferably, the volume of the large-volume small-flow high-pressure tank 9 is two times larger than that of the steady flow tank 5, and after the flow regulating valve 10 is opened to a certain opening degree, the large-volume small-flow high-pressure tank 9 can supply water to a user pipe network for a long time.
Preferably, the steady flow tank 5 is provided with a second pressure sensor for detecting the pressure in the steady flow tank 5. And a third pressure sensor is arranged on the large-volume small-flow high-pressure tank 9 and used for detecting the pressure in the large-volume small-flow high-pressure tank 9.
The working flow of the non-negative pressure water supply equipment of the embodiment is as follows:
under the normal condition, the pressure in stationary flow jar 5 is the second pressure of setting for, and the pressure in the big volume low discharge pressure jar 9 is first pressure of setting for, and second solenoid valve 8 is opened (second solenoid valve 8 is normally open state), and first solenoid valve 4 and flow control valve 10 are closed (first solenoid valve 4 and flow control valve 10 are normally closed state), and the first butterfly valve on the inlet tube is closed. The frequency conversion unit work, municipal water that comes flows to the frequency conversion unit through pipe 1, stationary flow jar 5, outlet pipe 18, water pump inlet manifold in proper order, and the frequency conversion unit pressurizes according to how much the principle of mending according to difference on municipal water pipe network pressure's basis, supplies water to user's pipe network through water pump outlet manifold and delivery pipe 12 in proper order again. This is the series water supply mode.
When the water supply flow of municipal water is lower than the water supply requirement of a user pipe network, the liquid level in the steady flow tank 5 gradually drops, and when the liquid level in the steady flow tank 5 drops to the set lowest liquid level, the first electromagnetic valve 4 and the flow regulating valve 10 are opened, and the second electromagnetic valve 8 is closed. A small part of water in the water pipe 1 enters the steady flow tank 5, and a large part of water enters the water inlet main pipe of the water pump through the water inlet branch pipe 3, and then enters the water supply pipe 12 through the water outlet main pipe of the water pump under the pressure of the frequency conversion unit to flow to a user pipe network. The water in the large-volume small-flow high-pressure tank 9 passes through the water outlet pipe, the pressure of the water is adjusted to be equal to the pressure of the water output by the frequency conversion unit through the pressure reducing valve 19, and the water enters the water supply pipe 12 through the flow adjusting valve 10 according to a first set flow and flows to a user pipe network. At this time, the large-volume small-flow high-pressure tank 9 is a main water supply source, and the inverter unit is an auxiliary water supply source according to the principle of how much difference is compensated. The main water supply source is more than 50% of water supply ratio to a user pipe network. A parallel water supply mode is formed by the water inlet branch pipe 3 and the large-volume small-flow high-pressure tank 9. Because the large-volume small-flow high-pressure tank 9 has large volume and adopts a parallel water supply mode, the large-volume small-flow high-pressure tank 9 can supply water to a user pipe network for a long time.
The big little flow high-pressure tank of volume 9 supplies water, has effectively alleviated water supply pressure, and at this moment, the water in the stationary flow jar 5 constantly increases, and the liquid level constantly risees, when filling up in the stationary flow jar 5, reduces flow control valve 10's aperture to open first butterfly valve, start booster pump 11. Most of the water in the water inlet pipe 1 enters a water inlet main pipe of the water pump through the water inlet branch pipe 3, and then enters a water supply pipe 12 through a water outlet main pipe of the water pump after being pressurized by the frequency conversion unit. One part of water in the water supply pipe 12 is pressurized by the booster pump 11 through the water inlet pipe and then is conveyed into the high-pressure tank 9 with large volume and small flow, and the other part of water directly flows to a user pipe network. The water in the large-volume small-flow high-pressure tank 9 passes through the water outlet pipe, the pressure is adjusted to be equal to the pressure of the water output by the frequency conversion unit through the pressure reducing valve 19, and the water enters the water supply pipe 12 through the flow adjusting valve 10 according to a second set flow and flows to a user pipe network. At this time, the high-volume small-flow high-pressure tank 9 is an auxiliary water supply source, and the frequency conversion unit is used as a main water supply source according to the principle of how much difference is compensated. The parallel water supply mode is still maintained. Wherein the second set flow rate is smaller than the first set flow rate.
The pressure in the steady flow tank 5 is continuously increased, when the pressure in the steady flow tank 5 reaches a second set pressure, the second electromagnetic valve 8 is opened, the first electromagnetic valve 4 is closed, and the opening degree of the flow regulating valve 10 is reduced again. Municipal water flows into the water supply pipe 12 through the water supply pipe 1, the steady flow tank 5, the outflow pipe 18, the water pump inlet header pipe, the frequency conversion unit and the water pump outlet header pipe in sequence. One part of water in the water supply pipe 12 flows to a user pipe network, the other part of water is pressurized by the booster pump 11 through the water inlet pipe and then is conveyed to the high-pressure tank 9 with large volume and small flow, and high-pressure water is supplemented to the high-pressure tank 9 with large volume and small flow so as to enhance the pressure of water in the high-pressure tank and maintain continuous water supply to the user pipe network. The water in the large-volume small-flow high-pressure tank 9 passes through the water outlet pipe, the pressure is adjusted to be equal to the pressure of the water output by the frequency conversion unit through the pressure reducing valve 19, and the water enters the water supply pipe 12 through the flow adjusting valve 10 according to a third set flow and flows to a user pipe network. At this time, the frequency conversion unit is still used as a main water supply source according to the principle of how much difference is compensated, and the high-volume and small-flow high-pressure tank 9 is used as an auxiliary water supply source. The parallel water supply mode is maintained. Wherein the third set flow rate is less than the second set flow rate.
When the pressure in the large-volume small-flow high-pressure tank 9 reaches the first set pressure, the flow rate regulation valve 10, the booster pump 11, and the first butterfly valve are closed. Municipal water flows into the water supply pipe 12 and flows to the user pipe network through the water supply pipe 1, the steady flow tank 5, the outflow pipe 18, the water pump water inlet main pipe, the frequency conversion unit and the water pump water outlet main pipe in sequence. And the series water supply mode is recovered.
If the water consumption of the user pipe network is reduced at night, the frequency conversion unit is closed, the flow regulating valve 10 is opened, and the water in the large-volume small-flow high-pressure tank 9 enters the water supply pipe 12 through the water outlet pipe according to a fourth set flow and flows to the user pipe network. When the water consumption at night is reduced, water is supplied through the large-volume small-flow high-pressure tank 9, and the frequent starting of the water pump is reduced. And the fourth set flow is less than or equal to the third set flow.
The no negative pressure water supply equipment of above-mentioned embodiment through intaking branch pipe and big volume low discharge high-pressure tank, when municipal water supply is less than the user water consumption, the water supply mode is switched into the parallelly connected mode by the series connection mode, sustainable to supplying water to the user pipe network, guarantees the water supply quality.
As a preferable example, a liquid level sensor 6 is arranged in the steady flow tank 5 and used for measuring the liquid level height in the steady flow tank, and when the liquid level in the steady flow tank 5 drops to a set lowest liquid level, the mode is switched to a parallel water supply mode, so that the situation that when the variable frequency water pump works at a lower liquid level, air in the steady flow tank 5 is sucked into the water pump, and the performance of the water pump is reduced and equipment is damaged is avoided.
As a preferred example, a through pipeline is connected between the water pump water inlet main pipe and the water pump water outlet main pipe, and the through pipeline is connected with the frequency conversion unit in parallel. And a second check valve and a second butterfly valve are arranged on the straight-through pipeline, a second energy storage device 13 is arranged between the second check valve and the second butterfly valve, and an air bag filled with gas is arranged in the second energy storage device 13. When the frequency conversion unit does not work, if the pressure of municipal incoming water rises, a small amount of water flows into the second energy storage 13 through the straight-through pipeline, and the gas in the air bag is compressed by the water until the pressure of the pipeline does not rise any more. If municipal water pressure drops, compressed air in the air bag expands to press water into the straight-through pipeline, so that the pressure drop of the pipeline is reduced, and the effect of stabilizing the water supply pressure of the system is achieved.
Preferably, the steady flow tank 5 is provided with a vacuum suppressor 7. When the liquid level in the steady flow tank 5 is reduced, the vacuum suppressor 7 works to suppress the negative pressure generated in the steady flow tank 5 and ensure the safe operation of the steady flow tank 5. The water inlet pipe 1 is provided with a first pressure sensor 2 for detecting the water pressure of the water inlet pipe 1.
Preferably, the frequency conversion unit comprises 2-3 groups of frequency conversion water pump units, and the frequency conversion water pump units are arranged between the water pump water inlet main pipe and the water pump water outlet main pipe in parallel. 2-3 groups of variable frequency water pump units are arranged between the water pump water inlet header pipe and the water pump water outlet header pipe in parallel, the multiple groups of variable frequency water pump units are independent, and one or more groups of variable frequency water pump units can be selected to operate according to actual requirements. The frequency conversion unit supplies water according to the pressure superposed by the requirement of a user on the basis of the municipal water supply pipe network pressure, and supplies water in a pressurized manner according to the principle of how much difference is compensated, thereby effectively saving energy.
Further, frequency conversion water pump unit includes the water pipe and sets gradually frequency conversion water pump 16, third check valve 15 and the third butterfly valve 14 on the water pipe, and frequency conversion water pump 16 and water pump inlet manifold are connected, and third butterfly valve 14 and water pump outlet manifold are connected. The variable frequency water pump 16 operates, the third butterfly valve 14 is used for controlling the water outlet flow and the pressure of the water pipe, and the third check valve 15 is used for preventing the high-pressure water of the water outlet main pipe of the water pump from flowing backwards when the variable frequency water pump 16 stops working.
Further, still be equipped with fourth butterfly valve 17 on the water pipe, fourth butterfly valve 17 is located between frequency conversion water pump 16 and the water pump inlet manifold. And a fourth butterfly valve 17 is arranged at the upstream of the variable frequency pump 16 and used for controlling the water inflow of the water pipe.
The embodiment of the invention also provides a water supply method, and the non-negative-pressure water supply equipment is adopted. The water supply method comprises the following steps:
and step 10) opening the second electromagnetic valve 8, and keeping the first electromagnetic valve 4 and the flow regulating valve 10 in a closed state. Municipal water enters the flow stabilizing tank 5 through the water inlet pipe 1 until the water pressure in the flow stabilizing tank 5 reaches a second set pressure. Wherein the second set pressure is municipal incoming water pressure.
Step 20) starting the frequency conversion unit and the booster pump 11, and opening the first butterfly valve on the water inlet pipe. Municipal water flows into the water supply pipe 12 through the water inlet pipe 1, the steady flow tank 5, the outlet pipe 18, the water inlet main pipe of the water pump, the frequency conversion unit and the water outlet main pipe of the water pump in sequence. One part of water in the water supply pipe 12 flows to a user pipe network, the other part of water is pressurized by the booster pump 11 through the water inlet pipe and then is conveyed to the large-volume small-flow high-pressure tank 9 until the pressure of the large-volume small-flow high-pressure tank 9 reaches a first set pressure, the booster pump 11 is stopped, and the first butterfly valve is closed. All water in the supply pipe 12 flows to the user pipe network.
And step 30), when the water supply flow of municipal water is lower than the water supply demand of a user pipe network, gradually reducing the liquid level in the steady flow tank 5, and when the liquid level in the steady flow tank 5 is reduced to the set lowest liquid level, opening the first electromagnetic valve 4 and the flow regulating valve 10, and closing the second electromagnetic valve 8. Under the effect of the frequency conversion unit, most of water in the water inlet pipe 1 enters the water inlet main pipe of the water pump through the water inlet branch pipe 3, and then enters the water supply pipe 12 through the water outlet main pipe of the water pump by pressurization of the frequency conversion unit to flow to a user pipe network. A small part of water in the water pipe 1 enters the steady flow tank 5. The water in the large-volume small-flow high-pressure tank 9 enters the water supply pipe 12 through the water outlet pipe according to a first set flow and flows to a user pipe network. At this time, the large-volume small-flow high-pressure tank 9 is a main water supply source, and the frequency conversion unit is an auxiliary water supply source according to the principle of how much difference is compensated.
And step 40) increasing the water in the steady flow tank 5 continuously, increasing the liquid level continuously, reducing the opening degree of the flow regulating valve 10 when the steady flow tank 5 is full, opening the first butterfly valve, and starting the booster pump 11. Most of the water in the water inlet pipe 1 enters a water inlet main pipe of the water pump through the water inlet branch pipe 3, and then enters a water supply pipe 12 through a water outlet main pipe of the water pump after being pressurized by the frequency conversion unit. One part of water in the water supply pipe 12 is pressurized by the booster pump 11 through the water inlet pipe and then is conveyed into the high-pressure tank 9 with large volume and small flow, and the other part of water directly flows to a user pipe network. The water in the large-volume small-flow high-pressure tank 9 enters the water supply pipe 12 through the water outlet pipe according to a second set flow and flows to a user pipe network. At this time, the high-volume small-flow high-pressure tank 9 is an auxiliary water supply source, and the frequency conversion unit is used as a main water supply source according to the principle of how much difference is compensated. Wherein the second set flow rate is less than the first set flow rate.
And step 50), continuously increasing the pressure in the flow stabilization tank 5, reducing the opening degree of the flow regulating valve 10 when the pressure in the flow stabilization tank 5 reaches a second set pressure, opening the second electromagnetic valve 8, and closing the first electromagnetic valve 4. Municipal water flows into the water supply pipe 12 through the water inlet pipe 1, the steady flow tank 5, the outlet pipe 18, the water inlet main pipe of the water pump, the frequency conversion unit and the water outlet main pipe of the water pump in sequence. One part of water in the water supply pipe 12 flows to a user pipe network, and the other part of water is pressurized by the booster pump 11 through the water inlet pipe and then is conveyed into the high-pressure tank 9 with large volume and small flow. The water in the large-volume small-flow high-pressure tank 9 enters the water supply pipe 12 through the water outlet pipe according to a third set flow and flows to a user pipe network. At this time, the frequency conversion unit is used as a main water supply source according to the principle of compensating the difference, and the high-volume small-flow high-pressure tank 9 is used as an auxiliary water supply source. Wherein the third set flow rate is less than the second set flow rate.
Step 60) when the pressure in the large-volume small-flow high-pressure tank 9 reaches the first set pressure, the flow rate adjustment valve 10, the booster pump 11, and the first butterfly valve are closed. Municipal water flows into the water supply pipe 12 and flows to the user pipe network through the water supply pipe 1, the steady flow tank 5, the outflow pipe 18, the water pump water inlet main pipe, the frequency conversion unit and the water pump water outlet main pipe in sequence.
According to the water supply method, the water inlet branch pipes and the large-volume small-flow high-pressure tank are matched for adjustment, when the municipal water supply is smaller than the water consumption of a user, the water supply mode is switched from the series mode to the parallel mode, water can be continuously supplied to a user pipe network, and the water supply quality is guaranteed.
As a preferable example, the water supply method of the embodiment of the present invention further includes:
and step 70) when the water consumption of the user pipe network at night is reduced, closing the frequency conversion unit, opening the flow regulating valve 10, and allowing the water in the large-volume small-flow high-pressure tank 9 to enter the water supply pipe 12 through the water outlet pipe according to a fourth set flow and flow to the user pipe network.
Supply water through big volume low discharge pressure tank 9 when the water consumption reduces night, guarantee user's low discharge water demand night, reduce the frequent start-up of water pump simultaneously.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also intended to be covered by the appended claims.
Claims (9)
1. A water supply method is characterized in that a non-negative pressure water supply device is adopted; the non-negative pressure water supply equipment comprises a water inlet pipe (1), a steady flow tank (5), an outflow pipe (18), a water pump water inlet header pipe, a frequency conversion unit, a water pump water outlet header pipe and a water supply pipe (12) which are connected in sequence; a water inlet branch pipe (3) is connected between the water inlet pipe (1) and a water inlet main pipe of the water pump, and a first electromagnetic valve (4) is arranged on the water inlet branch pipe (3); a second electromagnetic valve (8) is arranged on the outflow pipe (18); the high-pressure energy storage device further comprises a large-volume small-flow high-pressure tank (9), and a first energy storage device (91) is arranged in the large-volume small-flow high-pressure tank (9); a water inlet pipe and a water outlet pipe are connected between the water supply pipe (12) and the large-volume small-flow high-pressure tank (9), a pressure reducing valve (19) and a flow regulating valve (10) are arranged on the water outlet pipe, and a booster pump (11), a first check valve and a first butterfly valve are arranged on the water inlet pipe;
the water supply method includes the steps of:
step 10), opening a second electromagnetic valve (8), wherein the first electromagnetic valve (4) and the flow regulating valve (10) are both in a closed state; municipal incoming water enters the flow stabilizing tank (5) through the water inlet pipe (1) until the water pressure in the flow stabilizing tank (5) reaches a second set pressure;
step 20) starting the frequency conversion unit and the booster pump (11), and opening a first butterfly valve on the water inlet pipe; municipal incoming water flows into a water supply pipe (12) through an incoming water pipe (1), a steady flow tank (5), an outflow pipe (18), a water pump inlet header pipe, a frequency conversion unit and a water pump outlet header pipe in sequence; one part of water in the water supply pipe (12) flows to a user pipe network, the other part of water is pressurized by the booster pump (11) through the water inlet pipe and then is conveyed to the large-volume small-flow high-pressure tank (9) until the pressure of the large-volume small-flow high-pressure tank (9) reaches a first set pressure, the booster pump (11) is shut down, and a first butterfly valve is closed; all water in the water supply pipe (12) flows to a user pipe network;
step 30), when the water supply flow of municipal incoming water is lower than the water supply requirement of a user pipe network, the liquid level in the steady flow tank (5) gradually drops, and when the liquid level in the steady flow tank (5) drops to the set lowest liquid level, the first electromagnetic valve (4) and the flow regulating valve (10) are opened, and the second electromagnetic valve (8) is closed; the middle and small parts of water in the water inlet pipe (1) enter the steady flow tank (5), most of the water enters the water inlet main pipe of the water pump through the water inlet branch pipe (3), and then enters the water supply pipe (12) through the pressurization of the frequency conversion unit and flows to a user pipe network; the water in the large-volume small-flow high-pressure tank (9) enters a water supply pipe (12) through a water outlet pipe according to a first set flow and flows to a user pipe network; at the moment, the large-volume small-flow high-pressure tank (9) is used as a main water supply source, and the frequency conversion unit is used as an auxiliary water supply source according to the principle of how much difference is compensated;
step 40), continuously increasing water in the steady flow tank (5), continuously increasing the liquid level, reducing the opening degree of the flow regulating valve (10) when the steady flow tank (5) is filled with water, opening a first butterfly valve, and starting the booster pump (11); most of water in the water inlet pipe (1) enters a water inlet main pipe of the water pump through the water inlet branch pipe (3), and then enters a water supply pipe (12) through the water outlet main pipe of the water pump after being pressurized by the frequency conversion unit; one part of water in the water supply pipe (12) is pressurized by the booster pump (11) through the water inlet pipe and then is conveyed into the high-pressure tank (9) with large volume and small flow, and the other part of water directly flows to a user pipe network; the water in the large-volume small-flow high-pressure tank (9) enters a water supply pipe (12) through a water outlet pipe according to a second set flow and flows to a user pipe network, and the second set flow is smaller than the first set flow; at the moment, the large-volume small-flow high-pressure tank (9) is used as an auxiliary water supply source, and the frequency conversion unit is used as a main water supply source according to the principle of how much difference is compensated;
step 50), continuously increasing the pressure in the steady flow tank (5), reducing the opening degree of the flow regulating valve (10) when the pressure in the steady flow tank (5) reaches a second set pressure, opening the second electromagnetic valve (8), and closing the first electromagnetic valve (4); municipal water flows into a water supply pipe (12) through a water inlet pipe (1), a steady flow tank (5), an outlet pipe (18), a water inlet main pipe of a water pump, a frequency conversion unit and a water outlet main pipe of the water pump in sequence; one part of water in the water supply pipe (12) flows to a user pipe network, and the other part of water is pressurized by the booster pump (11) through the water inlet pipe and then is conveyed into the large-volume small-flow high-pressure tank (9); the water in the large-volume small-flow high-pressure tank (9) enters a water supply pipe (12) through a water outlet pipe according to a third set flow and flows to a user pipe network, and the third set flow is smaller than the second set flow; at the moment, the frequency conversion unit is used as a main water supply source according to the principle of how much difference is compensated, and the large-volume small-flow high-pressure tank (9) is used as an auxiliary water supply source;
step 60), when the pressure in the large-volume small-flow high-pressure tank (9) reaches a first set pressure, closing the flow regulating valve (10), the booster pump (11) and the first butterfly valve; municipal water flows into a water supply pipe (12) and flows to a user pipe network through a water supply pipe (1), a steady flow tank (5), an outlet pipe (18), a water pump inlet main pipe, a frequency conversion unit and a water pump outlet main pipe in sequence.
2. The water supply method according to claim 1, further comprising:
and step 70) when the water consumption of the user pipe network at night is reduced, closing the frequency conversion unit, opening the flow regulating valve (10), and allowing the water in the large-volume small-flow high-pressure tank (9) to enter a water supply pipe (12) through a water outlet pipe according to a fourth set flow and flow to the user pipe network.
3. Water supply method according to claim 1, characterized in that a level sensor (6) is provided in the ballast tank (5) for measuring the level of the liquid in the ballast tank.
4. The water supply method according to claim 1, wherein a through pipeline is connected between the water pump water inlet header and the water pump water outlet header, and the through pipeline is connected with the frequency conversion unit in parallel; the direct pipeline is provided with a second check valve and a second butterfly valve, a second energy storage device (13) is arranged between the second check valve and the second butterfly valve, and an air bag filled with gas is arranged in the second energy storage device (13).
5. Water supply method according to claim 1, characterized in that a vacuum suppressor (7) is provided on the ballast tank (5).
6. Water supply method according to claim 1, characterized in that said water intake pipe (1) is provided with a first pressure sensor (2).
7. The water supply method according to claim 1, wherein the frequency conversion unit comprises 2-3 groups of frequency conversion water pump units, and the frequency conversion water pump units are arranged between a water pump water inlet main pipe and a water pump water outlet main pipe in parallel.
8. Water supply method according to claim 7, characterized in that the variable frequency water pump unit comprises a water pipe, and a variable frequency water pump (16), a third check valve (15) and a third butterfly valve (14) which are arranged on the water pipe in sequence, wherein the variable frequency water pump (16) is connected with a water pump inlet manifold, and the third butterfly valve (14) is connected with a water pump outlet manifold.
9. Water supply method according to claim 8, characterized in that a fourth butterfly valve (17) is arranged on the water pipe, and the fourth butterfly valve (17) is positioned between the variable frequency water pump (16) and the water inlet manifold of the water pump.
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| CN118012154B (en) * | 2024-04-10 | 2024-06-21 | 中国建筑设计研究院有限公司 | Terminal pressure control system of delivery pipe net |
| CN118012155B (en) * | 2024-04-10 | 2024-06-21 | 中国建筑设计研究院有限公司 | Distributed pressure-maintaining water-storage cooperative water supply system |
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| CN1314862C (en) * | 2004-10-25 | 2007-05-09 | 姜全德 | Device for directly water supplementing pressurization of tap water pipe line |
| DE102010044304B4 (en) * | 2010-09-03 | 2016-03-10 | AL-KO Geräte GmbH | Druckwasserwerk |
| CN104746573A (en) * | 2013-12-31 | 2015-07-01 | 青岛万力科技有限公司 | Direct pressure-superposed secondary water supply equipment |
| CN106638792B (en) * | 2016-09-14 | 2019-06-04 | 厦门海源泵业有限公司 | Small flow energy-saving controller and secondary water-supply method applied to secondary water-supply equipment |
| CN109930661A (en) * | 2017-12-15 | 2019-06-25 | 上海威派格智慧水务股份有限公司 | Double tank body raising frequency pressure maintaining non-negative pressure water-supply devices and its method of supplying water |
| CN208088425U (en) * | 2018-02-09 | 2018-11-13 | 上海艺迈实业有限公司 | A kind of three pot type non-negative pressure water service systems of automatic voltage regulation compensation |
| CN113216326B (en) * | 2021-06-03 | 2022-03-25 | 蓝深集团股份有限公司 | Non-negative pressure water supply equipment with night small-flow function and water supply method |
| CN215367519U (en) * | 2021-06-03 | 2021-12-31 | 蓝深集团股份有限公司 | Double-tank negative-pressure-free water supply equipment |
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Effective date of registration: 20230720 Address after: 100020 Ligezhuang Village, Jinzhan Township, Chaoyang District, Beijing (South West Point of Jingyun Foundry) Patentee after: BEIJING JINGMINGTAI ENGINEERING&TECHNICAL DEVELOPMENT CO.,LTD. Address before: 508, 5th Floor, Building 1, Courtyard 3, Jinguan North 2nd Street, Shunyi District, Beijing, 101300 Patentee before: Beijing Building Ark Technology Co.,Ltd. Effective date of registration: 20230720 Address after: 508, 5th Floor, Building 1, Courtyard 3, Jinguan North 2nd Street, Shunyi District, Beijing, 101300 Patentee after: Beijing Building Ark Technology Co.,Ltd. Address before: No. 188 Xinle Road, Liuhe District, Nanjing City, Jiangsu Province Patentee before: NANJING POLYTECHNIC INSTITUTE |