CN114855939A - Series-parallel connection pressure-superposed water supply system - Google Patents
Series-parallel connection pressure-superposed water supply system Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 441
- 238000010521 absorption reaction Methods 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000005192 partition Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
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- 238000004659 sterilization and disinfection Methods 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
- E03B7/00—Water main or service pipe systems
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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
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
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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
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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
- E03B7/071—Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off
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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
- E03B7/072—Arrangement of flowmeters
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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
- E03B7/074—Arrangement of water treatment devices
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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
- E03B7/077—Arrangement of backflow preventing devices
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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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- 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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- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a series-parallel connection pressure-superposed water supply system, which comprises primary lifting equipment and secondary lifting equipment which are positioned in the same pump room and are arranged in series; the primary lifting equipment comprises a plurality of first water pumps connected in parallel, and the secondary lifting equipment comprises a plurality of second water pumps connected in parallel; the end of intaking of elementary lifting means is connected with municipal water supply pipe, perhaps through cutoff water tank and municipal water supply pipe connection, and the play water end of elementary lifting means is connected with the first delivery pipe that is used for directly supplying water to inferior high subregion user to parallelly connected the end of intaking with second grade lifting means simultaneously is connected, and the play water end of second grade lifting means is connected with the second delivery pipe that supplies water to the highest subregion user. The system is suitable for secondary water supply of two highest subareas of a high-rise building with the length of nearly one hundred meters, and solves the problems that when subarea parallel water supply is carried out, the flow rate of a second water pump of the highest water supply subarea is small, the lift is large, the Q-H curve is steep, the high-efficiency section is narrow, and the energy-saving effect is poor.
Description
Technical Field
The invention relates to the technical field of secondary water supply, in particular to a series-parallel connection pressure-superposed water supply system.
Background
In the subarea parallel water supply mode, each water supply subarea forms a system, operates independently, has a small accident range, and is a main water supply mode of a high-rise building with the current height not more than 100 m.
The traditional partitioned parallel water supply comprises a variable frequency pump set with a water tank and a water cutoff tank partitioned parallel water supply system (shown in figure 1) and also comprises a pipe network pressure-superposed water supply equipment partitioned parallel water supply system without a water tank (shown in figure 2). On the occasions with small water consumption in subareas of high-rise office buildings and the like, when subarea parallel water supply is adopted, the water supply flow of the highest subarea is slightly small, the lift is very large, the Q-H curve of the selected water pump is very steep, the high-efficiency section is very narrow, the water pump runs close to the power frequency, and the efficiency is low.
Chinese patent CN207392309U discloses a water pump series-parallel combination multi-region water supply device, including low-region parallel water pump, high-region parallel water pump, low-region series water pump, high-region series water pump and water storage box, low-region parallel water pump is connected with low-region water supply user, high-region parallel water pump is connected with high-region water supply user, low-region series water pump is connected with low-region water supply user, high-region series water pump is connected with high-region water supply user after being connected with low-region series water pump in series, the water inlets of low-region parallel water pump, high-region parallel water pump, low-region series water pump and high-region series water pump all are connected with the water storage box, the water outlets of low-region parallel water pump, high-region parallel water pump, low-region series water pump and high-region series water pump all are equipped with the check valve. The water supply device utilizes the characteristic that the water pumps are connected in series and in parallel in the low peak water supply period and the high peak water supply period, and saves energy by about 60 to 80 percent compared with the traditional single series or parallel multi-region water supply device through reasonable connection of each water pump and a water source.
However, the water supply device disclosed in chinese patent CN207392309U is supplied by a water pump after two times of serial pressure-superposition when the high-zone water supply is near zero flow, but the device adopts a common pump, which has a limitation that the water inlet pressure cannot exceed 0.6 MPa; when large-flow water supply is carried out, water is directly supplied by the main pump, and the problems that the Q-H curve of a water pump selected by the main pump in small-flow high-lift occasions such as office buildings is steep, the high-efficiency section is narrow, and the main pump is not energy-saving can not be solved.
As is well known, the pressure-bearing limit value of the water suction end of a common centrifugal pump is 0.6 MPa; when the series pressure-superposed water supply is adopted, if the water outlet pressure of the primary booster water pump is higher than 0.6MPa, the booster pumps arranged in series are required to be arranged in a high-position mounting mode and cannot be intensively arranged in a low-position pump room, so that a series of problems such as vibration, noise, dispersion management and the like are caused.
The well submersible pump is a common pump for pumping water from deep wells, and takes a stainless steel multilevel well submersible pump of Grundfos as an example, the flow range of the well submersible pump is 0.1-280 m 3 H, maximum lift 6.7MPa, and bearing capacity of pump body>2.0MPa。
The pump in pipe is also called a pump in sound-free pipe, and refers to a pressurizing device for placing a well submersible pump in a stainless steel pressure pipeline; the device has the characteristics of no noise (0dBA), small vibration, small installation space, sanitation (the contact surface with water is all stainless steel) and high pressure bearing, particularly has the advantage of pressure bearing of more than 2MPa, and can be arranged at any position in a water supply system theoretically; when the pump-in-pipe water supply is installed vertically, its floor space is still insufficient for 1/3 of the centrifugal pump water supply. Based on the advantages, in recent years, variable-frequency water supply equipment with a pump in a pipe and pressure-superposed water supply equipment with a pump in a pipe have occupied certain application markets in domestic secondary water supply occasions.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a series-parallel connection pressure-superposed water supply system which is suitable for secondary water supply of the highest two subareas of a high-rise building with the height of nearly one hundred meters and can arrange primary lifting equipment and secondary lifting equipment in the same pump room; the secondary lifting equipment adopts a stainless steel pipe middle pump as a water supply pump, so that the area of a pump room is saved, and the noise of the machine room is reduced; the high-efficiency section and the frequency conversion interval of the second water pump of the highest water supply partition secondary lifting equipment are expanded by reducing the lift of the second water pump, the operating efficiency of a second water pump unit is improved, and the power consumption is reduced, so that the problems that the flow of the second water pump of the highest water supply partition is small, the lift is large, a Q-H curve is steep, the high-efficiency section is narrow, and the energy-saving effect is poor when partitions are connected in parallel for water supply are solved.
In order to achieve the purpose, the invention provides a series-parallel connection pressure-superposed water supply system, which comprises a primary lifting device and a secondary lifting device which are positioned in the same pump room and are arranged in series;
the primary lifting equipment comprises a plurality of first water pumps connected in parallel, the secondary lifting equipment comprises a plurality of second water pumps connected in parallel, and the second water pumps adopt stainless steel tube middle pumps with the pressure-bearing limit value of a water inlet end not lower than 2.0 MPa;
the water inlet end of the primary lifting equipment is connected with a municipal water supply pipe, or the water inlet end of the primary lifting equipment is connected with the municipal water supply pipe through a cutoff water tank, the water outlet end of the primary lifting equipment is connected with a first water supply pipe for directly supplying water to users in a second highest subarea, and is simultaneously connected with the water inlet end of the secondary lifting equipment in parallel, and the water outlet end of the secondary lifting equipment is connected with a second water supply pipe for supplying water to the users in the highest subarea.
By adopting the scheme, the lift of the first water pump is properly controlled within 1.0 MPa; the series-parallel connection pressure-superposed water supply system is suitable for secondary water supply of the highest two subareas of a nearly hectometer high-rise building, and primary lifting equipment and secondary lifting equipment can be arranged in the same pump room; the secondary lifting equipment adopts a stainless steel pipe middle pump as a water supply pump, so that the area of a pump room is saved, and the noise of the machine room is reduced; according to the invention, the high-efficiency section and the frequency conversion interval of the second water pump are expanded by reducing the lift of the second water pump of the highest water supply subarea, the operation efficiency of the second water pump unit is improved, and the power consumption is reduced, so that the highest two-area water supply system in the subarea parallel water supply system in the prior art can be effectively replaced, and the problems of small flow, large lift, steep Q-H curve, narrow high-efficiency section and poor energy-saving effect of the second water pump of the highest water supply subarea during subarea parallel water supply are solved.
Furthermore, elementary lifting means still includes first outlet pipe, first outlet pipe is connected with a plurality of the play water end of first water pump, first water pump with be provided with first check valve and first control valve between the first outlet pipe, first pneumatic tank, first pressure sensor and first flow sensor have set gradually on the first outlet pipe.
By adopting the scheme, the arranged first air pressure tank is used for absorbing the pressure fluctuation of the first water outlet pipe and stabilizing the water outlet pressure.
Furthermore, the second-stage lifting equipment further comprises a second water outlet pipe, the second water outlet pipe is connected with the water outlet ends of the second water pumps, a second check valve and a second control valve are arranged between the second water pumps and the second water outlet pipe, and a second air pressure tank, a second pressure sensor and a second flow sensor are sequentially arranged on the second water outlet pipe.
By adopting the scheme, the second air pressure tank is used for absorbing the pressure fluctuation of the second water outlet pipe and stabilizing the water outlet pressure.
Furthermore, the water cut-off water tank is arranged into one or two, the water inlet end of the water cut-off water tank is connected with the municipal water supply pipe, and the water outlet end of the water cut-off water tank is connected with the water inlet end of the primary lifting equipment, so that the difference between the water absorption amount of the primary lifting equipment and the water supplement amount of the municipal water supply pipe is adjusted.
With the above arrangement, a shut off water tank must be provided when municipal water supply conditions do not permit the primary lifting device to directly draw water from the municipal water supply line.
Furthermore, a remote control ball float valve is arranged on a water replenishing pipe of the cutoff water tank.
Further, a liquid level sensor is arranged on the cutoff water tank.
By adopting the scheme, the arranged liquid level sensor can transmit overflow and ultra-low water level alarm signals to a control system of a duty room and primary lifting equipment and alarm on the spot; when the ultra-low water level occurs, the primary lifting equipment can be automatically closed, and the pump stopping protection function is realized; when the water level recovers, the primary lifting equipment can automatically recover to operate.
Furthermore, a steady flow tank for preventing the first water pump from excessively pumping the municipal water supply pipe to reduce the water supply pressure of the municipal pipe network is arranged between the primary lifting equipment and the municipal water supply pipe.
Furthermore, the municipal water supply pipe is connected with a water absorption main pipe, the water outlet end of the water absorption main pipe is connected with the water inlet end of a first water absorption pipe and the water inlet end of a second water absorption pipe, the water outlet end of the first water absorption pipe is connected with the steady flow tank, and the water outlet end of the second water absorption pipe is connected with other water supply equipment.
Furthermore, a third pressure sensor, a main water inlet valve, a Y-shaped filter, a backflow preventer and a remote water meter are sequentially arranged on the water absorption main pipe.
By adopting the scheme, the remote water meter has a field display function and can realize real-time data acquisition and remote transmission; is connected with the water absorption main pipe through a flange; the backflow preventer is used for preventing backflow of pressure water from polluting a tap water pipe network and has the same diameter as the connected pipeline; a low-resistance air partition type backflow preventer is adopted, the local resistance is 0.03MPa, the automatic drainage function is realized, and a signal is provided during drainage; the Y-shaped filter is used for protecting the backflow preventer from entering impurities and has the same diameter with the pipeline.
Further, a fourth pressure sensor is arranged on the second suction pipe.
Compared with the prior art, the invention has the following beneficial effects:
(1) the series-parallel connection pressure-superposed water supply system is suitable for secondary water supply of the highest two subareas of a nearly hectometer high-rise building, and primary lifting equipment and secondary lifting equipment can be arranged in the same pump room; the secondary lifting equipment adopts a stainless steel pipe intermediate pump as a water supply pump, so that the area of a pump room is saved, and the noise of the machine room is reduced.
(2) According to the invention, the high-efficiency section and the frequency conversion interval of the second water pump are expanded by reducing the lift of the second water pump of the highest water supply subarea, so that the operation efficiency of the second water pump unit is improved, and the power consumption is reduced, thereby effectively replacing the water supply system of the highest two areas in the subarea parallel water supply system in the prior art, and solving the problems of small flow, large lift, steep Q-H curve, narrow high-efficiency section and poor energy-saving effect of the second water pump of the highest water supply subarea during subarea parallel water supply.
(3) The first water pump and the second water pump can be optimized and selected, so that the working intervals of the first water pump and the second water pump are all located in the high-efficiency section, and the total water supply energy consumption of the two water supply areas can be further reduced.
Drawings
Fig. 1 is a schematic diagram of a conventional zoned water supply system.
Fig. 2 is a schematic view of another conventional zonal water supply system.
Fig. 3 is a schematic structural diagram of a series-parallel connection pressure-superposed water supply system in embodiment 1 of the invention.
Fig. 4 is a schematic structural diagram of a series-parallel pressure-superposed water supply system according to embodiment 2 of the present invention.
In the figure: 10. a first water pump; 11. a first check valve; 12. a first control valve; 13. a first water outlet pipe; 131. a first pneumatic tank; 132. a first pressure sensor; 133. a first flow sensor; 20. a second water pump; 21. a second check valve; 22. a second control valve; 23. a second water outlet pipe; 231. a second pneumatic tank; 232. a second pressure sensor; 233. a second flow sensor; 30. a first water supply pipe; 40. a second water supply pipe; 50. a shut-off water tank; 51. remotely controlling the float valve; 52. a liquid level sensor; 60. a flow stabilizing tank; 70. a water absorption main pipe; 701. a third pressure sensor; 702. a main water inlet valve; 703. a Y-type filter; 704. a backflow preventer; 705. a remote water meter; 71. a first water suction pipe; 72. a second suction pipe; 721. a fourth pressure sensor; 80. municipal water supply pipes.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
Referring to fig. 3, a series-parallel connection pressure-superposed water supply system includes a primary lifting device and a secondary lifting device which are located in the same pump room and are arranged in series;
the primary lifting equipment comprises a plurality of first water pumps 10 connected in parallel, the secondary lifting equipment comprises a plurality of second water pumps 20 connected in parallel, and the second water pumps 20 adopt stainless steel pipe middle pumps with the pressure-bearing limit value of a water inlet end not lower than 2.0 MPa;
the water inlet end of the primary lifting device is connected to a municipal water supply line 80 via a shut off water tank 50, the water outlet end of the primary lifting device is connected to a first water supply line 30 for direct water supply to the users in the next highest subdivision and is simultaneously connected in parallel to the water inlet end of the secondary lifting device, and the water outlet end of the secondary lifting device is connected to a second water supply line 40 for water supply to the users in the highest subdivision.
The rated flow of the primary lifting equipment needs to meet the total second flow of water supply of the two pressurizing areas; the set value of the water outlet pressure is determined by combining the type selection of the water pump, the working intervals of the first water pump 10 and the second water pump 20 are positioned in the high-efficiency section as much as possible, and the lift of the first water pump 10 is controlled within 1.0MPa appropriately; the rated flow of the secondary lifting equipment needs to meet the water supply second flow of the highest subarea water supply range; the lift of the water pump in the equipment is the water outlet pressure value of the equipment-the water outlet pressure value of the primary lift pump which is actually available at the water suction main pipe of the equipment; the outlet pressure set point should be able to meet the water supply pressure requirements of the most unfavorable water supply point for the highest partition.
The series-parallel connection pressure-superposed water supply system is suitable for secondary water supply of the highest two subareas of a nearly hectometer high-rise building, and primary lifting equipment and secondary lifting equipment can be arranged in the same pump room; the secondary lifting equipment adopts a stainless steel pipe middle pump as a water supply pump, so that the area of a pump room is saved, and the noise of the machine room is reduced; according to the invention, the high-efficiency section and the frequency conversion interval of the second water pump 20 are expanded by reducing the lift of the second water pump 20 of the highest water supply subarea, so that the operation efficiency of the second water pump 20 unit is improved, and the power consumption is reduced, thereby effectively replacing the water supply system of the highest two areas in the subarea parallel water supply system in the prior art, and solving the problems that the flow of the water supply equipment of the highest water supply subarea is small and the lift is large, the selected water pump Q-H curve is steep, the high-efficiency section is narrow, and the energy-saving effect of the water supply equipment is poor when subarea parallel water supply is carried out.
The primary lifting equipment further comprises a first water outlet pipe 13, the first water outlet pipe 13 is connected with the water outlet ends of the plurality of first water pumps 10, a first check valve 11 and a first control valve 12 are arranged between the first water pumps 10 and the first water outlet pipe 13, and a first air pressure tank 131, a first pressure sensor 132 and a first flow sensor 133 are sequentially arranged on the first water outlet pipe 13. The first air pressure tank 131 is arranged for absorbing pressure fluctuation of the first water outlet pipe 13 and stabilizing water outlet pressure.
The special frequency conversion controller on each first water pump 10 of the primary lifting equipment realizes mutual communication through the CAN bus technology, CAN automatically adjust the frequency conversion operation ratio according to the change of water demand, realizes that a plurality of first water pumps 10 simultaneously and synchronously balance and share the operation, realizes that the first water pump 10 unit is always in the frequency conversion operation state, and avoids the first water pump 10 from being separated from the high-efficiency area operation. Meanwhile, in the digital integrated full-frequency-conversion control equipment, the first water pump 10 is 100% standby with frequency conversion control, so that multi-sensor signal input is supported, and the safety and reliability of primary lifting equipment are improved; the first water pumps 10 can be automatically switched at regular time, are mutually standby and run circularly.
The primary lifting equipment adopts a fuzzy control technology, and automatically adjusts a working point according to actual data measured by the first pressure sensor 132, so that the primary lifting equipment always operates in an optimal working state; the primary lifting equipment has the functions of automatic operation, manual operation, linkage work with the secondary lifting equipment, small-flow operation control and the like; faults such as overvoltage, undervoltage, short circuit, overcurrent, open phase, frequency converter fault, disinfection facility fault and the like can be alarmed and automatically processed; the recoverable fault can be automatically or manually eliminated, and the normal operation can be recovered; the automatic control system has the capability of resisting electromagnetic interference; remote monitoring and operation interfaces are reserved in the equipment, and the requirements of building intelligent management and remote monitoring and management of a water supply management department are met.
The second-stage lifting equipment further comprises a second water outlet pipe 23, the second water outlet pipe 23 is connected with the water outlet ends of the plurality of second water pumps 20, a second check valve 21 and a second control valve 22 are arranged between the second water pumps 20 and the second water outlet pipe 23, and a second air pressure tank 231, a second pressure sensor 232 and a second flow sensor 233 are sequentially arranged on the second water outlet pipe 23. The second air pressure tank 231 is arranged for absorbing pressure fluctuation of the second water outlet pipe 23 and stabilizing water outlet pressure. The secondary lifting device is controlled in a similar manner to the primary lifting device.
The primary lifting equipment interlocking control system has the advantages that the primary lifting equipment interlocking control system meets the basic requirements on the primary lifting equipment and has an interlocking control function of the secondary lifting equipment and the primary lifting equipment in the laminating operation, and the primary lifting equipment interlocking control system also has a pressure loss protection function, namely when the water inlet pressure of the secondary lifting equipment is lower than the water outlet set pressure value of the primary lifting equipment by 0.1MPa, the equipment alarms and operates in an accelerating mode; when the pressure difference reaches 0.15MPa, the equipment should automatically stop running; when the pressure of the primary lifting equipment is recovered to be normal, the secondary lifting equipment can automatically recover to be normal.
In this embodiment, the cutoff water tank 50 is provided in two, the water inlet end of the cutoff water tank 50 is connected to the municipal water supply pipe 80, and the water outlet end of the cutoff water tank 50 is connected to the water inlet end of the primary lifting device to adjust the difference between the water absorption capacity of the primary lifting device and the supplementary water capacity of the municipal water supply pipe 80. The shut off tank 50 must be provided when municipal water supply conditions do not permit the primary lifting device to directly draw water from the municipal water supply line 80.
The cutoff water tank 50 is provided with a liquid level sensor 52, and a water replenishing pipe of the cutoff water tank 50 is provided with a remote control ball cock 51.
The liquid level sensor 52 can transmit overflow and ultra-low water level alarm signals to the control system of the duty room and the primary lifting equipment and alarm on the spot; when the ultra-low water level occurs, the primary lifting equipment can be automatically closed, and the pump stopping protection function is realized; when the water level recovers, the primary lifting equipment can automatically recover to operate.
The primary lifting equipment adopts digital integrated full-frequency conversion water supply equipment, and a special frequency converter configured for each first water pump 10 can be arranged together with a water pump motor (packaged in a shell with IP55 protection level) or be arranged in a control cabinet in a centralized way; the second-stage lifting equipment adopts digital integrated full-frequency conversion pipe pump pressure-superposed water supply equipment, and a special frequency converter configured for each working pump is centrally arranged in the control cabinet. The water supply mode mainly comprises a cut-off water tank 50, primary lifting equipment, secondary lifting equipment, a pipeline, accessories and an automatic control system; the power supply of the equipment is a double power supply or a double loop.
And (3) a water replenishing principle: supplying water into the cutoff water tank 50 through a pipe by a municipal water supply pipe 80 according to a change of a water level in the cutoff water tank 50 by a remote control float valve 51;
the water suction end of the primary lifting equipment sucks water from the cutoff water tank 50 through a pipeline, and after pressurization, the water is conveyed to the water inlet end of the secondary lifting equipment and the first water supply pipe 30 in parallel through the first water outlet pipe 13; the second water pump 20 is pressurized based on the discharge pressure of the first water pump 10, and then supplies water to the highest-ranked user through the second water supply pipe 40.
Example 2
Referring to fig. 4, a series-parallel connection pressure-superposed water supply system is similar to embodiment 1, except that: the cutoff water tank 50 is not provided and a steady flow tank 60 for preventing the first water pump 10 from excessively pumping the municipal water supply pipe 80 to reduce the water supply pressure of the municipal pipe network is provided between the primary lifting device and the municipal water supply pipe 80.
The municipal water supply pipe 80 is connected with a water absorption header pipe 70, the water outlet end of the water absorption header pipe 70 is connected with the water inlet end of a first water absorption pipe 71 and the water inlet end of a second water absorption pipe 72, the water outlet end of the second water absorption pipe 72 is connected with a steady flow tank 60, and the water outlet end of the first water absorption pipe 71 is connected with other water supply equipment.
The water intake manifold 70 is provided with a third pressure sensor 701, a main water inlet valve 702, a Y-shaped filter 703, a backflow preventer 704 and a remote water meter 705 in sequence.
The remote water meter 705 has the function of on-site display, can realize real-time data acquisition and remote transmission, and is connected with the water absorption header pipe 70 through a flange; the backflow preventer 704 is used for preventing backflow of pressure water from polluting a tap water pipe network, has the same diameter with a connected pipeline, adopts a low-resistance air-partition type backflow preventer, has local resistance of 0.03MPa, has an automatic drainage function, and has a signal when in drainage; the Y-filter 703 is provided to protect the backflow preventer 704 from entering impurities, and has the same diameter as the pipe.
The second suction pipe 72 is provided with a fourth pressure sensor 721.
The working principle is as follows: the water suction end of the primary lifting equipment sucks water from a municipal water supply pipe 80 through a steady flow tank 60, and after pressurization, the water is parallelly connected and conveyed to the water inlet end of the secondary lifting equipment and the first water supply pipe 30 through a first water outlet pipe 13; the second water pump 20 is pressurized based on the discharge pressure of the first water pump 10, and then supplies water to the highest-ranked user through the second water supply pipe 40.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A series-parallel connection pressure-superposed water supply system is characterized by comprising a primary lifting device and a secondary lifting device which are positioned in the same pump room and are arranged in series;
the primary lifting equipment comprises a plurality of first water pumps (10) connected in parallel, the secondary lifting equipment comprises a plurality of second water pumps (20) connected in parallel, and the second water pumps (20) adopt stainless steel pipe middle pumps with the pressure-bearing limit values of water inlet ends not lower than 2.0 MPa;
the water inlet end of the primary lifting device is connected with a municipal water supply pipe (80) or is connected with the municipal water supply pipe (80) through a cutoff water tank (50), the water outlet end of the primary lifting device is connected with a first water supply pipe (30) for directly supplying water to users in the next highest subarea and is simultaneously connected with the water inlet end of the secondary lifting device in parallel, and the water outlet end of the secondary lifting device is connected with a second water supply pipe (40) for supplying water to users in the highest subarea.
2. A series-parallel pressure-superposed water supply system according to claim 1, wherein the primary lifting device further comprises a first water outlet pipe (13), the first water outlet pipe (13) is connected with the water outlet ends of the plurality of first water pumps (10), a first check valve (11) and a first control valve (12) are arranged between the first water pumps (10) and the first water outlet pipe (13), and a first pneumatic tank (131), a first pressure sensor (132) and a first flow sensor (133) are sequentially arranged on the first water outlet pipe (13).
3. The series-parallel pressure-superposed water supply system according to claim 1, wherein the secondary lifting device further comprises a second water outlet pipe (23), the second water outlet pipe (23) is communicated with water outlet ends of the plurality of second water pumps (20), a second check valve (21) and a second control valve (22) are arranged between the second water pumps (20) and the second water outlet pipe (23), and a second air pressure tank (231), a second pressure sensor (232) and a second flow sensor (233) are sequentially arranged on the second water outlet pipe (23).
4. A series-parallel stacked water supply system according to claim 1, wherein the cut-off water tank (50) is provided in one or two, the water inlet end of the cut-off water tank (50) is connected with the municipal water supply pipe (80), and the water outlet end of the cut-off water tank (50) is connected with the water inlet end of the primary lifting equipment to adjust the difference between the water absorption amount of the primary lifting equipment and the water supplement amount of the municipal water supply pipe (80).
5. A series-parallel pressure-superposed water supply system according to claim 1, characterized in that a remote-control ball cock (51) is arranged on the water replenishing pipe of the cutoff water tank (50).
6. A series-parallel pressure-superposed water supply system according to claim 1, wherein the cut-off water tank (50) is provided with a liquid level sensor (52).
7. A series-parallel pressure-superposed water supply system according to claim 1, characterized in that a steady flow tank (60) for preventing the first water pump (10) from excessively pumping the municipal water supply pipe (80) to reduce the water supply pressure of the municipal pipe network is arranged between the primary lifting device and the municipal water supply pipe (80).
8. The series-parallel pressure-superposed water supply system according to claim 7, wherein the municipal water supply pipe (80) is connected with a water suction header pipe (70), the water outlet end of the water suction header pipe (70) is connected with the water inlet end of a first water suction pipe (71) and the water inlet end of a second water suction pipe (72), the water outlet end of the second water suction pipe (72) is connected with the flow stabilizing tank (60), and the water outlet end of the first water suction pipe (71) is connected with other water supply equipment.
9. The series-parallel pressure-superposed water supply system according to claim 8, wherein the water suction main pipe (70) is provided with a third pressure sensor (701), a main water inlet valve (702), a Y-shaped filter (703), a backflow preventer (704) and a remote water meter (705) in sequence.
10. A series-parallel pressure superposed water supply system according to claim 8, wherein the second suction pipe (72) is provided with a fourth pressure sensor (721).
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| CN202210501040.9A CN114855939A (en) | 2022-05-09 | 2022-05-09 | Series-parallel connection pressure-superposed water supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210501040.9A CN114855939A (en) | 2022-05-09 | 2022-05-09 | Series-parallel connection pressure-superposed water supply system |
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| CN201358490Y (en) * | 2009-02-10 | 2009-12-09 | 王雷 | Combined type intelligent positive pressure superimposed feed water device |
| CN105201045A (en) * | 2015-09-23 | 2015-12-30 | 安徽舜禹水务实业有限公司 | Box-type pressure-superposed variable-frequency energy-saving water supplying system |
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