CN210459366U - Variable-flow multistage multi-outlet water pump constant-pressure water supply system - Google Patents
Variable-flow multistage multi-outlet water pump constant-pressure water supply system Download PDFInfo
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- CN210459366U CN210459366U CN201920701173.4U CN201920701173U CN210459366U CN 210459366 U CN210459366 U CN 210459366U CN 201920701173 U CN201920701173 U CN 201920701173U CN 210459366 U CN210459366 U CN 210459366U
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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
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Abstract
The utility model discloses a multistage many exports water pump constant voltage water supply system of variable flow, including the multistage many exports water pump of variable flow (1), pressure sensor (3) and variable frequency speed regulator (2) are constituteed, and the multistage many exports water pump of variable flow (1) different positions "district section" sets up multistage export (6) and connects water supply pipe through check valve (4) and be low district, well district, high district water supply respectively, pressure sensor (3) are established on high district outlet pipe, multistage many exports water pump (1) motor, pressure sensor (3) and variable frequency speed regulator (2) interconnect, high district outlet pressure and synchronous control well district, low district pressure by variable frequency speed regulator (2) closed-loop control many exports water pump (1) through predetermined pressure value. The application of the system saves a large amount of equipment investment and running electric energy for users, and reduces the cost.
Description
Technical Field
The utility model relates to a high-rise, super high-rise industry and civil buildings water supply system specifically are multistage many export water pump constant pressure water supply system of variable flow.
Background
At present, most of high-rise and super-high-rise buildings adopt a multi-stage single-outlet variable frequency water pump, are divided into high, middle and low equal regions according to water supply pressure, and supply water at constant pressure; the specifications of the water pump are multiple and the system is complex, the energy consumption is wasted, impellers of all sections of the existing multistage multi-outlet water pump product are coaxial and have the same type, and can only be driven by one motor, one frequency converter and one pressure sensor, so that the pressure of one outlet can only be controlled, other outlets cannot be effectively controlled under constant pressure, in addition, the flow of each section is greatly different, and the energy consumption is inevitably high by adopting the impellers of the same type. Therefore, the existing multistage multi-outlet water pump can only be applied to constant-rotating-speed fire-fighting water supply without requirements on outlet pressure fluctuation of each area, and the same problem is also faced by the "multistage multi-outlet water pump and multi-area multi-stage water pump parallel water supply system" disclosed by [ CN201943120U ], so that the multistage multi-outlet water pump and the multi-area multi-stage water pump parallel water supply system cannot be popularized and used in high-rise and super-high-rise water supply equipment. The problems are common problems to be solved by water supply and drainage, water pump manufacturing and industrial control professionals.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a multistage many exports water pump constant voltage water supply system of variable flow.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: the utility model provides a multistage many exports water pump constant voltage water supply system of variable flow, includes multistage many exports water pump (1), and pressure sensor (3) and variable frequency speed regulator (2) are constituteed, and multistage many exports water pump (1) different positions set up multistage export (6) and connect the water supply pipe through check valve (4) and supply water for low district, high district respectively, pressure sensor (3) are established on high district's export pipeline, variable flow multistage many exports water pump (1), pressure sensor (3) and variable frequency speed regulator (2) interconnect, pressure value through system's predetermine is by variable frequency speed regulator (2) closed-loop control variable flow multistage many exports water pump (1) motor.
Furthermore, the variable flow multistage multi-outlet water pump (1) is provided with multistage outlets at different positions and is connected with a water supply pipeline through a one-way valve (4) to supply water for a low area, a middle area and a high area respectively.
Furthermore, the water source at the water inlet end of the variable flow multi-stage multi-outlet water pump (1) is a water storage tank, a pressure-superposed tank and a pipe network residual pressure utilization device.
Furthermore, the variable-flow multi-stage multi-outlet water pump is formed by combining impellers of different types in all sections.
Furthermore, the impeller type of the multistage multi-outlet water pump is determined by the flow of each section, the diameter of the impeller is gradually increased from top to bottom, and the impeller is in a step shape.
The control method of the variable flow multistage multi-outlet water pump constant-pressure water supply system comprises the following steps: i.e. according to the pressure value H of the high-zone pressure sensor (3)hThe stage number and the diameter size of the impeller of the multistage multi-outlet water pump (1) are adjusted to meet the pressure and the flow of each stage of outlet, and the conditions met are as follows: the total suction flow of the water pump is equal to the sum of the output flows of all the zones, namely QT=ΣQi=Ql+Qm+QhIf the flow rates of the zones are the same, the overflow rate of the low zone is 1.5 times that of the middle zone and 3 times that of the high zone, and the pressure difference relationship is as follows: the total lift of the water pump is taken as the sum of the lifts (differential pressure) of all sections, namely Hh=ΣΔHi=ΔHl+ΔHm+ΔHh(if H0=0），ΔHl=f（Ql，Qm，Qh），ΔHm=f（Qm，Qh），ΔHh=f（Qh），Hh=f（Ql，Qm，Qh）+f（Qm，Qh）+f（Qh），Hm=f（Ql，Qm，Qh）+f（Qm，Qh），Hl=f（Ql，Qm，Qh) It is obvious that the change of each flow rate is applied to the high zone lift HhThe reaction is strongest, the middle zone is inferior, the lower zone is worse, therefore, a pressure sensor is required to be arranged at the outlet of the high zone, and the impeller model of each zone is required to be designed in a segmented mode. Wherein QT-total flow rate; h0= water source pressure; ql-low zone flow rate; qm-a median zone flow rate; qh= high zone flow, Hl-low zone pressure; hm-a middle zone pressure; hhHigh zone pressure,. DELTA.HlLow zone pressure difference, Δ HmMiddle zone pressure difference, and Δ Hh-high pressure differential.
The utility model has the advantages that: the water supply system of the multi-region different-pressure water supply region is realized by one water pump, can be applied to living water supply equipment with large flow change, and is particularly suitable for the water supply system of high-rise and super high-rise industrial and civil buildings. The application of the system saves a large amount of electric energy for users and reduces the cost.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of a two stage low and high zone outlet system.
Fig. 2 is a diagram of a low, medium and high three-stage outlet system.
Fig. 3 is a schematic diagram of a multi-stage multi-outlet water pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model discloses a multistage many export water pump constant voltage water supply system of variable flow, including multistage many export water pump 1, pressure sensor 3 and variable frequency speed regulator 2 are constituteed, and multistage many export water pump 1 different positions set up multistage export 6 and connect the water supply pipe through check valve 4 and be the low district respectively, high district supplies water, pressure sensor 3 establishes on high district's export pipeline, multistage many export water pump 1, pressure sensor 3 and variable frequency speed regulator 2 establish ties, and the pressure value of predetermineeing through the system is by the multistage many export water pump 1 motor of variable frequency speed regulator 2 closed-loop control.
In fig. 2, a variable flow multi-stage multi-outlet water pump 1 is provided with multi-stage outlets 6 at different positions, and the multi-stage outlets 6 are connected with a water supply pipeline through a one-way valve 4 to supply water to a low region, a middle region and a high region respectively.
Wherein the water source at the water inlet end of the variable flow multistage multi-outlet water pump 1 is a water storage tank, a pressure-superposed tank and a pipe network residual pressure utilization device.
As shown in FIG. 3, the control method of the constant pressure water supply system of the variable flow multi-stage multi-outlet water pump is that the pressure value H of the pressure sensor 3 in the high area is used for controlling the constant pressure water supply systemhThe stage number and the diameter size of the impeller of the variable flow multistage multi-outlet water pump 1 are adjusted to meet the pressure and the flow of each stage of outlet, and the conditions met are as follows: the total suction flow of the water pump is equal to the sum of the output flows of all the zones, namely QT=ΣQi=Ql+Qm+QhIf the flow rates of the zones are the same, the overflow rate of the low zone is 1.5 times that of the middle zone and 3 times that of the high zone, and the pressure difference relationship is as follows: the total lift of the water pump is taken as the sum of the lifts (differential pressure) of all sections, namely Hh=ΣΔHi=ΔHl+ΔHm+ΔHh(if H0=0），ΔHl=f（Ql，Qm，Qh），ΔHm=f（Qm，Qh），ΔHh=f（Qh），Hh=f（Ql，Qm，Qh）+f（Qm，Qh）+f（Qh），Hm=f（Ql，Qm，Qh）+f（Qm，Qh），Hl=f（Ql，Qm，Qh) It is obvious that the change of each flow rate is applied to the high zone lift HhThe reaction is strongest, the middle zone is inferior, and the lower zone is worse, so that the pressure sensor is arranged at the outlet of the high zone. Wherein QT-total flow rate; h0= water source pressure; ql-low zone flow；Qm-a median zone flow rate; qh= high zone flow, Hl-low zone pressure; hm-a middle zone pressure; hhHigh zone pressure,. DELTA.HlLow zone pressure difference, Δ HmMiddle zone pressure difference, and Δ Hh-high pressure differential.
The concrete implementation effect is that, taking xx hotel as an example, the building is 30 floors high, and the hot water in the building is about 210m3D, dividing the basement into three zones and adopting the flow of 25m3The three groups of multi-stage pumps (single outlets) with the delivery lifts of 50 m, 90 m and 128 m are supplied with variable frequency and constant pressure, and the pressure is respectively set to be 0.45 Mp, 0.85 Mp and 1.25 Mp;
the specific implementation method of the system is as follows: 1. arranging a pressure sensor in a high area, and setting the closed-loop pressure to be 125m by a PID (proportion integration differentiation) arranged in a frequency converter; 2. the peak flow of each area is taken as 21m3H, so the low section design flow is Σ Q1+Q2+Q3=21+21+21=63m3H, the lift is 45m, and 64m is taken3Standard large impeller 3 group,/h; middle zone design flow rate of Q2+Q3=21+21=42m3H, the lift is 85-45=40m, 45m is taken3Standard large impeller 2 set of (2); high zone flow rate of Q3=21m3H, the lift is 125-85=40m, and 32m is taken3Standard small impeller 3 set of/h. After running on a laboratory bench or on site, errors exist certainly, the impeller is taken down, the diameter of the blade of the impeller is properly increased and decreased, and the impeller is repeatedly debugged until the pressure of three areas meets the design requirements. At present, the system runs stably, and the energy saving rate is about 60%. The following table is the actual electricity meter for each month of xx hotels before and after the system is in operation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the concept of the present invention within the technical scope of the present invention.
Claims (5)
1. The utility model provides a multistage many exports water pump constant voltage water supply system of variable flow, its characterized in that, includes the multistage many exports water pump of variable flow (1), and pressure sensor (3) and variable frequency speed regulator (2) are constituteed, and the multistage many exports water pump of variable flow (1) different positions set up multistage export (6) and connect the water supply pipe through check valve (4) and supply water for low district, high district respectively, pressure sensor (3) are established on high district's export pipeline, the multistage many exports water pump of variable flow (1), pressure sensor (3) and variable frequency speed regulator (2) interconnect, and the pressure value of predetermineeing through the system is by the multistage many exports water pump of variable flow (1) closed-loop control variable frequency speed regulator (2).
2. The constant pressure water supply system of the variable flow multi-stage multi-outlet water pump according to claim 1, wherein the variable flow multi-stage multi-outlet water pump (1) is provided with multi-stage outlets (6) at different position 'sections' and is connected with water supply pipelines through the one-way valve (4) to supply water to the lower region, the middle region and the high region respectively.
3. The variable flow multi-stage multi-outlet water pump constant pressure water supply system according to claim 1 or 2, wherein the water source at the water inlet end of the variable flow multi-stage multi-outlet water pump (1) is a water storage tank, an overlying tank, and a pipe network residual pressure utilization device.
4. The constant pressure water supply system of claim 1, wherein the variable flow multi-stage multi-outlet water pump is composed of different types of impellers in different sections.
5. The constant pressure water supply system of claim 4, wherein the impeller type of the multi-stage multi-outlet water pump is determined by the head Δ H of each sectionlThe impeller type is determined by the flow delta Qi of each section, and the size of the impeller is gradually increased from top to bottom and is in a step shape.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110359518A (en) * | 2019-05-16 | 2019-10-22 | 戚长胜 | A kind of variable-flow multi-stage-multi-outlet water pump constant pressure water supply system and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359518A (en) * | 2019-05-16 | 2019-10-22 | 戚长胜 | A kind of variable-flow multi-stage-multi-outlet water pump constant pressure water supply system and control method |
| CN110359518B (en) * | 2019-05-16 | 2024-08-06 | 戚长胜 | Variable-flow multistage multi-outlet water pump constant-pressure water supply system and control method |
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