CN111997143B - Energy-saving optimized pipe network pressure-superposed water supply control system - Google Patents

Energy-saving optimized pipe network pressure-superposed water supply control system Download PDF

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Publication number
CN111997143B
CN111997143B CN202010870554.2A CN202010870554A CN111997143B CN 111997143 B CN111997143 B CN 111997143B CN 202010870554 A CN202010870554 A CN 202010870554A CN 111997143 B CN111997143 B CN 111997143B
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pipe network
pressure
water supply
water
branch
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CN111997143A (en
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蒋介中
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Etit Smart Water Technology Co ltd
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Etit Smart Water Technology Co ltd
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    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00Water main or service pipe systems
    • E03B7/07Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B11/00Arrangements or adaptations of tanks for water supply
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00Water main or service pipe systems
    • E03B7/07Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/074Arrangement of water treatment devices
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03BINSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00Water main or service pipe systems
    • E03B7/07Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/075Arrangement of devices for control of pressure or flow rate
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structural Engineering (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

The invention discloses an energy-saving optimized pipe network pressure-superposed water supply control system, which comprises a pipe network pressure-superposed water supply subsystem and a pipe network control subsystem, wherein the pipe network pressure-superposed water supply subsystem is connected with a municipal pipe network and used for performing pressure-superposed water supply on the municipal pipe network to a user end, and the pipe network control subsystem is used for monitoring the pressure of the user end pipe network and controlling the pipe network pressure-superposed water supply subsystem; according to the invention, the pipe network control subsystem is matched on the basis of the pipe network pressure-superposed water supply subsystem, the actual water is monitored in real time by using the pipe network control subsystem, the monitored data is fed back to the pipe network pressure-superposed water supply subsystem, the function of real-time adjustment of an actual water supply mode is realized by adjusting the water pump assembly and using the variable frequency control cabinet according to the real-time water demand, and the energy-saving performance is better.

Description

Energy-saving optimized pipe network pressure-superposed water supply control system
Technical Field
The invention relates to the technical field of water supply equipment, in particular to an energy-saving optimized pipe network pressure-superposed water supply control system.
Background
In recent years, with the increasing progress of urbanization, high-rise residences have had a certain trend of urban development. However, as high-rise dwellings grow, the demand for municipal water supply is becoming more demanding. Because the traditional municipal water supply system can only meet the water supply requirements of low-rise users, but can not meet the water supply requirements of high-rise buildings. Therefore, the construction of a water supply system for high-rise residences is required to meet the water demand of the high-rise residences.
In the prior art, non-negative pressure water supply equipment is often adopted to meet the water demand of high-rise residences. It has the characteristics of small flow and high lift. However, the non-negative pressure water supply equipment in the prior art has low intelligent degree, and cannot meet the requirement of high-rise residential building water demand and achieve high efficiency and energy conservation. China is a water-deficient country, and in daily life, water can continuously flow out once a water faucet is screwed, and the water can not be in danger at all. But in fact, we rely on water for survival, and are increasingly in short supply. Therefore, the traditional non-negative pressure water supply equipment has a larger difference with the water saving policy of China, and the further water saving improvement is realized, so that the field of the non-negative pressure water supply equipment faces larger pressure and challenge.
Disclosure of Invention
In order to solve the problems, the invention provides an energy-saving optimized pipe network pressure-superposed water supply control system, which utilizes a pipe network control subsystem to realize real-time monitoring of water consumption information of a user side and provides data support for the pipe network pressure-superposed water supply subsystem, so that the pipe network pressure-superposed water supply subsystem can manage actual water supply in real time according to feedback data of the pipe network control subsystem, and the energy conservation of the whole equipment can be effectively improved.
The technical scheme of the invention is as follows: an energy-saving optimized pipe network pressure-superposed water supply control system comprises a pipe network pressure-superposed water supply subsystem and a pipe network control subsystem, wherein the pipe network pressure-superposed water supply subsystem is connected with a municipal pipe network and used for performing pressure-superposed water supply on the municipal pipe network to a user side, and the pipe network control subsystem is used for monitoring the pressure of the pipe network of the user side and controlling the pipe network pressure-superposed water supply subsystem; the pipe network pressure-superposed water supply subsystem comprises a pressure-stabilized compensation tank connected with a municipal pipe network, a water pump assembly used for connecting the pressure-stabilized compensation tank with a user end pipe network, an energy storage device, a negative pressure eliminator and a variable frequency control cabinet used for variable frequency treatment, wherein the energy storage device and the negative pressure eliminator are arranged on the pressure-stabilized compensation tank; the mounting rack is used for mounting the pressure stabilizing compensation tank, the water pump assembly and the variable frequency control cabinet;
the water pump assembly comprises a water inlet pipe network with branch ends connected with the pressure stabilizing compensation tank, a plurality of groups of branch water pump sets with water inlet ends respectively connected with the branch ends of the water inlet pipe network, a plurality of groups of multifunctional integrated valves respectively connected with the water outlet ends of the branch water pump sets, and a service pipe with one end connected to the multifunctional integrated valve and the other end connected to a user end;
the water inlet pipe network comprises a first branch pipe for connecting the pressure-stabilizing compensation tank with the branch water pump set and a second branch pipe for connecting the municipal pipe network with the branch water pump set; electromagnetic valves are arranged at the joint of the pressure stabilizing compensation tank and the branch water pump set and the joint of the municipal pipe network and the branch water pump set;
the service pipe comprises a plurality of branch pipes, a rotational flow supercharging filter and a water collecting pipe, wherein one end of each branch pipe is respectively connected with the multifunctional integrated valve, the water inlet end of each rotational flow supercharging filter is connected with the other end of each branch pipe, one end of each water collecting pipe is connected with the water outlet end of each rotational flow supercharging filter, and the other end of each water collecting pipe is connected with a user end;
the cyclone pressurizing filter comprises a plurality of cyclone cavities with cylindrical structures, a cyclone pressurizer, a collecting trough, a filter element unit and a communicating pipe, wherein the water inlet end of the cyclone pressurizer penetrates through the side wall of each cyclone cavity and is positioned in each cyclone cavity;
the cyclone supercharger comprises a cavity supercharging ball which is positioned in the cyclone cavity and provided with a large-diameter hole and a small-diameter hole on the surface, a large-diameter pipe with one end penetrating through the side wall of the cyclone cavity and mounted on the large-diameter hole and the other end connected with the multifunctional integrated valve, and a small-diameter cup which is positioned in the cyclone cavity and mounted on the small-diameter hole; the inner wall of the small-diameter cup is provided with a swirl groove, and the side wall of the small-diameter cup is uniformly provided with water leakage holes;
the variable-frequency control cabinet comprises a variable-frequency constant-voltage control cabinet and a control gateway arranged in the variable-frequency constant-voltage control cabinet; the control gateway comprises a control gateway body, a terminal login module for staff login and safety authentication, and a first Web interface module connected with the pipe network control subsystem;
the pipe network control subsystem comprises a monitoring gateway which can be connected with the control gateway based on the internet, and a pressure detection device which is used for detecting the pressure of a user end pipe network and is connected with the monitoring gateway;
the monitoring gateway comprises a detecting gateway body and a second Web interface module in butt joint with the first Web interface module.
Further, the voltage stabilization compensation tank is made of 304 stainless steel materials and is subjected to matte treatment on the inner surface and the outer surface of the stainless steel; all parts in contact with water are made of food-grade 304 stainless steel; realizes no new pollution and can effectively ensure the water safety.
Furthermore, a basket type filter is arranged on the first branch pipe; the effect of intercepting and removing impurities in water can be realized by utilizing the basket type filter, and the water safety is further enhanced.
Furthermore, the multiple groups of branch water pump sets are respectively used for supplying water to areas of different water supply areas, and the water supply areas specifically comprise 1-5 layers of first water supply areas, 6-10 layers of second water supply areas, and 5+ 1-5 n layers of nth water supply areas; different branch water pump sets are adopted for supplying water to different floors, and better comprehensive energy saving performance is achieved.
Further, the branch water pump group comprises a conventional water supply pump for low water usage and a spare water supply pump for high water usage for compensation; the problem of insufficient water supply pressure of a high-rise building can be solved by using the standby water supply pump, the alternate use in later maintenance is more convenient, and the problem of incapability of supplying water in the maintenance is effectively avoided.
Further, the pressure detection device comprises a digital remote transmission pressure gauge arranged on the service pipe and a pressure sensor arranged on the user side; the pressure is monitored by the digital remote pressure gauge on the service pipe and the pressure sensor on the user side, so that the accuracy of the monitored result can be ensured, and whether water leakage occurs in the water inlet pipe network of the user can be monitored according to the difference between the pressure sensor and the service pipe.
Furthermore, the variable-frequency constant-voltage control cabinet comprises a cabinet body, a frequency converter arranged in the cabinet body, a PLC connected with the branch water pump group, and a touch screen arranged on the cabinet body and connected with the PLC; can realize carrying out manual settlement to the play water pressure of user end through the touch-sensitive screen that sets up through PLC, can carry out the settlement of different pressure values according to water peak period and low peak period in the use of reality for not only can satisfy user's water demand also can indirect realization energy-conserving effect in the use of reality.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the pipe network control subsystem is matched on the basis of the pipe network pressure-superposed water supply subsystem, the actual water is monitored in real time by using the pipe network control subsystem, the monitored data is fed back to the pipe network pressure-superposed water supply subsystem, the function of real-time adjustment of an actual water supply mode is realized by adjusting the water pump assembly and using the variable frequency control cabinet according to the real-time water demand, and the energy-saving performance is better; in addition, the invention realizes the setting of the actual pressure by adopting two modes of manual site setting and online setting based on the network, can set different values of the water pressure according to the peak time and the low peak time of the water, and not only can meet the water demand of users, but also can indirectly realize the energy-saving effect.
Drawings
FIG. 1 is a schematic view of the operation of embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a pipe network pressure-superposed water supply subsystem according to embodiment 1 of the present invention;
FIG. 3 is a block diagram of modules of embodiment 1 of the present invention;
FIG. 4 is an exploded view of the service entrance pipe according to embodiment 1 of the present invention;
FIG. 5 is a schematic view showing the internal structure of a vortex chamber in example 1 of the present invention;
the system comprises a 1-pressure-stabilizing compensation tank, a 2-water pump assembly, a 21-water inlet pipe network, a 22-branched water pump set, a 23-multifunctional integrated valve, a 24-service pipe, a 241-branch pipe, a 242-water collecting pipe, a 3-energy storage, a 4-negative pressure eliminator, a 5-variable frequency control cabinet, a 51-variable frequency constant pressure control cabinet, a 6-mounting rack, a 7-rotational flow pressurizing filter, a 71-rotational flow cavity, a 72-rotational flow pressurizing device, a 721-cavity pressurizing ball, a 722-large-diameter pipe, a 723-small-diameter cup, a 73-fee collecting groove, a 74-filter unit and a 75-communicating pipe.
Detailed Description
Example 1: as shown in fig. 1, the energy-saving optimized pipe network pressure-superposed water supply control system comprises a pipe network pressure-superposed water supply subsystem which is connected with a municipal pipe network and used for performing pressure-superposed water supply on the municipal pipe network to a user end, and a pipe network control subsystem which is used for monitoring the pressure of the pipe network of the user end and controlling the pipe network pressure-superposed water supply subsystem; as shown in fig. 2, the pipe network pressure-superposed water supply subsystem comprises a pressure-stabilizing compensation tank 1 connected with a municipal pipe network, a water pump assembly 2 used for connecting the pressure-stabilizing compensation tank 1 with a user end pipe network, an energy storage 3, a negative pressure eliminator 4 and a variable frequency control cabinet 5 which are installed on the pressure-stabilizing compensation tank 1, and an installation rack 6 used for installing the pressure-stabilizing compensation tank 1, the water pump assembly 2 and the variable frequency control cabinet 5; the pressure stabilizing compensation tank 1 is made of 304 stainless steel and is subjected to matte treatment on the inner surface and the outer surface of the stainless steel;
the water pump component 2 comprises a water inlet pipe network 21 with branch ends connected with the pressure stabilizing compensation tank 1, a plurality of groups of branch water pump sets 22 with water inlet ends respectively connected with the branch ends of the water inlet pipe network 21, a multifunctional integrated valve 23 respectively connected with the water outlet ends of the 2 groups of branch water pump sets 21, and a service pipe 24 with one end connected to the multifunctional integrated valve 23 and the other end connected to a user end;
the water inlet pipe network 21 comprises a first branch pipe for connecting the pressure-stabilizing compensation tank 1 with the branch water pump unit 22 and a second branch pipe for connecting the municipal pipe network with the branch water pump unit 22; electromagnetic valves are arranged at the joint of the pressure stabilizing compensation tank 1 and the branch water pump set 22 and the joint of the municipal pipe network and the branch water pump set 22; the first branch pipe is provided with a basket type filter;
as shown in fig. 4, the service pipe 24 includes a plurality of branch pipes 241 having one ends respectively connected to the multifunctional integrated valve 23, a cyclone pressure increasing filter 7 having a water inlet end connected to the other end of the branch pipe 241, and a water collecting pipe 242 having one end connected to a water outlet end of the cyclone pressure increasing filter 7 and the other end connected to a user end;
as shown in fig. 4 and 5, the cyclone pressurizing filter 7 includes a plurality of cyclone chambers 71 having a cylindrical structure, a cyclone pressurizing unit 72 having a water inlet end penetrating through a sidewall of the cyclone chamber 71 and located inside the cyclone chamber 71, a collecting groove 73 installed at a lower end of the cyclone chamber 71, a filter unit 74 installed at an upper end of the cyclone chamber 71, and a communicating pipe 75 for connecting two adjacent cyclone chambers 71;
the swirl supercharger 72 comprises a cavity supercharging ball 721 which is positioned in the swirl chamber 71 and provided with a large-diameter hole and a small-diameter hole on the surface, a large-diameter pipe 722 one end of which penetrates through the side wall of the swirl chamber 71 and is arranged on the large-diameter hole and the other end of which is connected with the multifunctional integrated valve 23, and a small-diameter cup 723 which is positioned in the swirl chamber 71 and is arranged on the small-diameter hole; the inner wall of the small-diameter cup 723 is provided with a swirl groove, and the side wall of the small-diameter cup 723 is uniformly provided with water leakage holes;
the variable frequency control cabinet 5 comprises a variable frequency constant voltage control cabinet 51 and a control gateway arranged inside the variable frequency constant voltage control cabinet 51; the control gateway comprises a control gateway body, a terminal login module for staff login and safety authentication, and a first Web interface module connected with the pipe network control subsystem;
the pipe network control subsystem comprises a monitoring gateway and a pressure detection device, wherein the monitoring gateway can be connected with the control gateway based on the internet, and the pressure detection device is used for detecting the pressure of a user end pipe network and is connected with the monitoring gateway;
the monitoring gateway comprises a detecting gateway body and a second Web interface module in butt joint with the first Web interface module.
The pressure detection device comprises a digital remote transmission pressure gauge arranged on the service pipe 24 and a pressure sensor arranged on a user end; the variable-frequency constant-voltage control cabinet 51 comprises a cabinet body, a frequency converter arranged inside the cabinet body, a PLC connected with the branch water pump set 22 and a touch screen arranged on the cabinet body and connected with the PLC.
As shown in fig. 3, in actual water supply, the water outlet pressure of the user side can be set manually through the variable-frequency constant-pressure control cabinet; the water outlet pressure of the user side can be set after the staff logs in through the terminal login module and passes the safety authentication;
in actual water use, the pressure detection device monitors actual water use data of a user side in real time and feeds the actual water use data back to the control gateway, and the control gateway performs intelligent control on the branch water pump group 22 through a PLC (programmable logic controller), specifically: the frequency converter compares the set pressure with the real-time monitored pressure, and when the pressure is higher or lower than the set pressure, the output frequency of the branch water pump group 22 is reduced or increased until the real-time monitored pressure is equal to the set pressure.
Example 2: the difference from example 1 is: the multi-group branch water pump set 22 is used for supplying water to areas of different water supply areas respectively, and the water supply areas specifically comprise 1-5 layers of first water supply areas, 6-10 layers of second water supply areas and 1-5 n layers of nth water supply areas; the branched water pump group 22 includes a conventional water supply pump for low water usage and a backup water supply pump for high water usage for compensation.
It should be noted that: in this embodiment, the actual floor is 12 floors, and 3 sets of branch water pump sets 22 are respectively used for the first water supply area of 1-5 floors, the second water supply area of 6-10 floors, and the third water supply area of 10-12 floors.

Claims (2)

1. An energy-saving optimized pipe network pressure-superposed water supply control system comprises a pipe network pressure-superposed water supply subsystem and a pipe network control subsystem, wherein the pipe network pressure-superposed water supply subsystem is connected with a municipal pipe network and used for performing pressure-superposed water supply on the municipal pipe network to a user side, and the pipe network control subsystem is used for monitoring the pressure of the pipe network of the user side and controlling the pipe network pressure-superposed water supply subsystem; the system is characterized in that the pipe network pressure-superposed water supply subsystem comprises a pressure-stabilized compensation tank (1) connected with a municipal pipe network, a water pump assembly (2) used for connecting the pressure-stabilized compensation tank (1) with a user end pipe network, an energy storage device (3) and a negative pressure eliminator (4) which are arranged on the pressure-stabilized compensation tank (1), a variable frequency control cabinet (5) used for variable frequency treatment, and a mounting rack (6) used for mounting the pressure-stabilized compensation tank (1), the water pump assembly (2) and the variable frequency control cabinet (5);
the water pump assembly (2) comprises a water inlet pipe network (21) with branch ends connected with the pressure stabilizing compensation tank (1), a plurality of groups of branch water pump sets (22) with water inlet ends respectively connected with the branch ends of the water inlet pipe network (21), a plurality of groups of multifunctional integrated valves (23) with water outlet ends respectively connected with the branch water pump sets (22), and a service pipe (24) with one end connected to the multifunctional integrated valve (23) and the other end connected to a user end;
the water inlet pipe network (21) comprises a first branch pipe for connecting the pressure-stabilizing compensation tank (1) with the branch water pump set (22) and a second branch pipe for connecting the municipal pipe network with the branch water pump set (22); electromagnetic valves are arranged at the joint of the pressure stabilizing compensation tank (1) and the branch water pump set (22) and the joint of the municipal pipe network and the branch water pump set (22); the first branch pipe is provided with a basket type filter;
the multiple groups of branch water pump sets (22) are respectively used for supplying water to areas of different water supply areas, and the water supply areas specifically comprise 1-5 layers of first water supply areas, 6-10 layers of second water supply areas, 5(n-1) + 1-5 n layers of nth water supply areas; the branch water pump group (22) comprises a conventional water supply pump for low water usage and a spare water supply pump for high water usage for compensation;
the service pipe (24) comprises a plurality of branch pipes (241) with one ends respectively connected with the multifunctional integrated valve (23), a rotational flow pressurizing filter (7) with a water inlet end connected with the other end of the branch pipe (241), and a water collecting pipe (242) with one end connected with the water outlet end of the rotational flow pressurizing filter (7) and the other end connected with a user end;
the cyclone pressurizing filter (7) comprises a plurality of cyclone cavities (71) with cylindrical structures, a cyclone pressurizer (72) with a water inlet end penetrating through the side wall of the cyclone cavity (71) and positioned inside the cyclone cavity (71), a collecting groove (73) arranged at the lower end of the cyclone cavity (71), a filter element unit (74) arranged at the upper end of the cyclone cavity (71), and a communicating pipe (75) used for connecting two adjacent cyclone cavities (71);
the cyclone supercharger (72) comprises a cavity supercharging ball (721) which is positioned in the cyclone cavity (71) and provided with a large-diameter hole and a small-diameter hole on the surface, a large-diameter pipe (722) with one end penetrating through the side wall of the cyclone cavity (71) and installed on the large-diameter hole and the other end connected with the multifunctional integrated valve (23), and a small-diameter cup (723) which is positioned in the cyclone cavity (71) and installed on the small-diameter hole; the inner wall of the small-diameter cup (723) is provided with a swirl groove, and the side wall of the small-diameter cup (723) is uniformly provided with water leakage holes;
the variable-frequency control cabinet (5) comprises a variable-frequency constant-voltage control cabinet (51) and a control gateway arranged in the variable-frequency constant-voltage control cabinet (51); the control gateway comprises a control gateway body, a terminal login module for staff login and safety authentication, and a first Web interface module connected with the pipe network control subsystem;
the pipe network control subsystem comprises a monitoring gateway and a pressure detection device, wherein the monitoring gateway can be connected with the control gateway based on an internet, and the pressure detection device is used for detecting the pressure of a pipe network at a user end and is connected with the monitoring gateway;
the monitoring gateway comprises a detecting gateway body and a second Web interface module in butt joint with the first Web interface module;
the variable-frequency constant-voltage control cabinet (51) comprises a cabinet body frequency converter, a frequency converter arranged in the cabinet body, a PLC connected with the branched water pump set (22) and a touch screen arranged on the cabinet body and connected with the PLC.
2. The energy-saving optimized pipe network pressure-superposed water supply control system according to claim 1, wherein the pressure detection device comprises a digital remote pressure gauge installed on a service pipe (24) and a pressure sensor installed on a user terminal.
CN202010870554.2A 2020-08-26 2020-08-26 Energy-saving optimized pipe network pressure-superposed water supply control system Active CN111997143B (en)

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102587458A (en) * 2011-01-07 2012-07-18 上海祥帮工程设备有限公司 Multifunctional non-negative pressure water supply equipment
CN203634951U (en) * 2013-11-15 2014-06-11 自贡川滤设备制造有限公司 Automatic dirt-discharging cyclone separator
CN103669467A (en) * 2013-11-19 2014-03-26 高密胜鑫交通工程有限公司 Non-negative pressure water supply equipment
CN104846946A (en) * 2014-10-23 2015-08-19 青岛万力科技有限公司 Energy-saving no-negative-pressure direct-connected water supply equipment
CN105696654A (en) * 2016-03-18 2016-06-22 石连科 Water supply system and container and boost pump thereof and water supply method
WO2018102939A1 (en) * 2016-12-05 2018-06-14 王彩霞 Prefabricated pump station for tap water pressurization
CN206452917U (en) * 2017-02-16 2017-09-01 罗付义 A kind of wheat planting irrigation rig
CN208105364U (en) * 2017-12-27 2018-11-16 北京威派格科技发展有限公司 The compensation double tank pressure-stabilizing water supply equipment of residual quantity

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