CN210797729U - Overvoltage protection type water supply system - Google Patents

Overvoltage protection type water supply system Download PDF

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Publication number
CN210797729U
CN210797729U CN201920835437.5U CN201920835437U CN210797729U CN 210797729 U CN210797729 U CN 210797729U CN 201920835437 U CN201920835437 U CN 201920835437U CN 210797729 U CN210797729 U CN 210797729U
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water
pipe
water pump
communicated
outlet pipe
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CN201920835437.5U
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陈燕君
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Abstract

The utility model provides an overvoltage protection type water supply system, which comprises a house-shaped shell, a first water pump, a first water outlet pipe, a first water inlet pipe, a support frame, a second water pump, a second water outlet pipe, a second water inlet pipe, an anti-cracking sleeve, a gathering pipe, a shunt pipe, a user conveying pipe, an outer support plate and a control box, wherein the first water pump is installed on one side of the inner bottom of the house-shaped shell through a bolt; the support frame is fixed on the inner side of the house-shaped shell through bolts, and a second water pump is mounted on the support frame through bolts; the anti-cracking sleeve is sleeved on the second water outlet pipe; the upper end of the storage battery is provided with a main switch through a screw. The utility model discloses room shape shell, crack control cover, the setting of second water pump and battery, overall structure realizes fine protection to the system, and all can continue work when outside has a power failure or the system is excessive pressure, has still prevented because the phenomenon of the too big burst water pipe of water pressure, user convenient to use.

Description

Overvoltage protection type water supply system
Technical Field
The utility model belongs to the technical field of water supply system, especially, relate to an overvoltage protection type water supply system.
Background
The water supply system is satisfied with the requirements of water users on water quality, water quantity and water pressure. In addition, the capital construction investment is saved, the operation cost is reduced, the operation and the detection are convenient, and a reasonable water supply system is selected according to specific conditions, so that the safety of water supply equipment is guaranteed, and the economic benefit of the whole water supply system is fully exerted.
The invention discloses an energy-saving water supply system for providing stable water flow and pressure, which is disclosed as CN 204326159U, and comprises a mechanical part and an electrical control part, wherein the electrical control part comprises a primary line power distribution control loop and a secondary line power distribution control loop, after the water supply system runs, a PLC outputs a signal to a frequency converter, the frequency converter receives the signal to enable a motor M1 to run, and a sensor transmits a field pressure signal to the PLC. If the motor M1 is enough to provide water pressure, only the frequency is changed to operate the motor M1, if the motor M1 is operated to 50HZ and still does not reach the set pressure, the system automatically switches the motor M1 from the frequency changing state to the power frequency, and the motor M2 is started in a frequency changing mode until the pressure reaches the set value. However, the existing energy-saving water supply system for providing stable water flow and pressure has the problems that the whole structure does not well protect the system, the external power failure cannot continue to work, the system directly stops running due to the over-pressure phenomenon, and a maintenance department cannot be informed of maintenance in time, and the water pipe is not protected to a certain extent, so that the water pipe is cracked, and the use of a user is very inconvenient.
Therefore, it is necessary to invent an overpressure protection type water supply system.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an overvoltage protection type water supply system, there is overall structure not to the fine protection of system realization in order to solve current energy-conserving water supply system who is used for providing stable rivers and pressure, and just there is not the way continuation work when the outside has a power failure, the direct shut down operation of overvoltage phenomenon system appears, can not in time inform the maintenance department to maintain, because do not carry out certain protection to the water pipe and the phenomenon that the water pipe can appear exploding, the user uses very inconvenient problem. The overpressure protection type water supply system comprises a house-shaped shell, a first water pump, a first water outlet pipe, a first water inlet pipe, a supporting frame, a second water pump, a second water outlet pipe, a second water inlet pipe, an anti-cracking sleeve, a gathering pipe, a flow dividing pipe, a user conveying pipe, an outer supporting plate and a control box, wherein the first water pump is installed on one side of the inner bottom of the house-shaped shell through a bolt, the water outlet part of the first water pump is communicated with one end of the first water outlet pipe, the water pumping part of the first water pump is communicated with one end of the first water inlet pipe, and the other end of the first water inlet pipe penetrates through the house-shaped shell to; the support frame is fixed on the inner side of the house-shaped shell through bolts, and a second water pump is mounted on the support frame through bolts; the water outlet part of the second water pump is communicated with one end of a second water outlet pipe, the water pumping part of the second water pump is communicated with one end of a second water inlet pipe, and the other end of the second water inlet pipe penetrates through the house-shaped shell to be communicated with the first water inlet pipe; the anti-cracking sleeve is sleeved on the second water outlet pipe, wherein the other end of the second water outlet pipe is communicated with the upper end of the converging pipe, and the lower end of the converging pipe is communicated with the other end of the first water outlet pipe; one end of the flow dividing pipe is communicated with the gathering pipe, the other end of the flow dividing pipe is communicated with the user conveying pipe, and the flow dividing pipe is positioned between the gathering pipe and the user conveying pipe; the outer support plate is fixed on the other outer side of the house-shaped shell through screws, and a control box is placed on the outer support plate; the control box comprises a box door, a box body, a storage battery, a controller, an overvoltage protector, an alarm, a touch display screen and a main switch, wherein the box door is arranged on one side of the box body through a hinge; a partition board is fixed between the two inner walls of the box body through bolts, a storage battery is placed above the partition board, and a main switch is arranged at the upper end of the storage battery through screws; the interior lower part of box is equipped with controller, overvoltage protector and alarm in proper order, and the opposite side of box is installed the touch display screen through the screw.
The controller comprises a signal processing module, a display module, a rectifier bridge, a first relay, a second relay, a wireless transmission module and a CPU (central processing unit), wherein the rectifier bridge is connected with an external power supply through a power line, is connected with a storage battery through the power line and is also connected with a main switch through a lead; the input terminal of the CPU is connected with a signal processing module and a display module through a signal wire in sequence, wherein the signal processing module is connected with the alarm through the signal wire, and the display module is connected with the touch display screen through the signal wire; the output terminal of the CPU is connected with a first relay and a second relay in sequence through signal lines, wherein the first relay is connected with a first water pump through the signal lines, the second relay is connected with a second water pump through the signal lines, and the first water pump and the second water pump are respectively connected with the overvoltage protector through the signal lines; the wireless transmission module is connected with an output terminal of the CPU through a signal wire, and the output terminal of the CPU is connected with an overvoltage protector through a signal wire; the first water pump and the second water pump are ISW horizontal pipeline water pumps, the storage battery is GFM-1000, the overvoltage protector is ZYSPD, the alarm is ZH-JDB-1, the touch display screen is a DT0 series controllable display screen, the signal processing module is UD LAN-401, the display module is UG-2832ALBMG09, the rectifier bridge is KBPC1010, the first relay and the second relay are NR2 and have parameters of 25G/Z13A-25A, the wireless transmission module is ZM2441PA08, the CPU is AT89S51-24PU, the electric energy required by the system can be effectively provided, the system cannot stop working when an external power supply fails, the use requirements of the models are better met, and the selected power consumption and cost are equal, the work is stable and reliable.
The house-shaped shell is in a house shape made of a rigid material; the whole triangle-shaped that makes for hard steel material of support frame, house shape shell has protected its inside system not receive external damage, and gives sound insulation effect better, and the support frame is convenient for the installation of second water pump to make two play water positions separate, and stability is better, and simple structure is practical.
The number of the anti-cracking sleeves is two, and the anti-cracking sleeves are respectively sleeved on the first water outlet pipe and the second water outlet pipe; the anti-cracking sleeve comprises a rubber ring, a rubber layer and a steel wire arrangement layer, wherein the rubber ring is fixed on one side of the anti-cracking sleeve through screws, and the rubber ring is a connecting part of the anti-cracking sleeve and the first water outlet pipe and the second water outlet pipe; the rubber layer is the outer wall of crack control cover, and the inner wall on rubber layer is the steel wire range layer, and this steel wire range in situ portion is made for soft steel wire staggered arrangement, has realized having avoided the phenomenon of leaking to fine the sealing of connector department, and can also prevent to lead to the phenomenon of bursting apart the water pipe because the water pressure that goes out is too big, and safety protection nature is high, has improved life.
The shunt tubes are three, one ends of the three shunt tubes are communicated with the gathering tube, and the other ends of the three shunt tubes are communicated with the user conveying tube, so that the water source is shunted, the pressure of water flow is reduced, the water flow is better conveyed to a user, and the use requirement is met.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses the setting of crack control cover has realized the fine sealed of connector department, the phenomenon that can not appear leaking, and can also prevent to lead to the phenomenon of exploding the water pipe owing to go out water pressure too big, and safety protection nature is high, has improved life.
2. The utility model discloses the second water pump, wireless transmission module's setting, when the phenomenon of excessive pressure appears, can stop the water supply of first water pump then supplies water by the second water pump, and still can transmit overvoltage information for maintenance terminal and make it overhaul as early as possible, has realized the alternate operation that two aspects supplied water.
3. The utility model discloses the setting of room shape shell and battery has protected its inside system not receive external damage, has fine syllable-dividing effect, and the system can not the stop work when external power source has a power failure to better demand that satisfies the use, job stabilization is reliable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the anti-cracking sleeve structure of the present invention.
Fig. 3 is a schematic structural diagram of the control box of the present invention.
Fig. 4 is a schematic structural diagram of the working principle of the present invention.
Fig. 5 is a schematic diagram of the circuit connection of the overvoltage protector of the present invention.
In the figure:
1-house shaped shell, 2-first water pump, 3-first water outlet pipe, 4-first water inlet pipe, 5-support frame, 6-second water pump, 7-second water outlet pipe, 8-second water inlet pipe, 9-crack prevention sleeve, 91-rubber ring, 92-rubber layer, 93-steel wire arrangement layer, 10-convergence pipe, 11-shunt pipe, 12-user delivery pipe, 13-outer support plate, 14-control box, 141-box door, 142-box body, 143-storage battery, 144-controller, 1441-signal processing module, 1442-display module, 1443-rectifier bridge, 1444-first relay, 1445-second relay, 1446-wireless transmission module, 1447-CPU, 145-overvoltage protector, 146-alarm, 147-touch display screen, 148-master switch.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example (b):
as shown in figures 1 to 5
The utility model provides an overvoltage protection type water supply system, including house shape shell 1, first water pump 2, first outlet pipe 3, first inlet tube 4, support frame 5, second water pump 6, second outlet pipe 7, second inlet tube 8, crack control cover 9, converging pipe 10, shunt tubes 11, user's conveyer pipe 12, outer supporting plate 13 and control box 14, first water pump 2 is installed through the bolt to one side of the interior bottom of house shape shell 1, and wherein the play water position of first water pump 2 communicates with each other with the one end of first outlet pipe 3, and the position of drawing water of first water pump 2 communicates with each other with the one end of first inlet tube 4, and the other end of this first inlet tube 4 passes house shape shell 1 and establishes in its outside; the support frame 5 is fixed on the inner side of the house-shaped shell 1 through bolts, and a second water pump 6 is installed on the support frame 5 through bolts; the water outlet part of the second water pump 6 is communicated with one end of a second water outlet pipe 7, the water pumping part of the second water pump 6 is communicated with one end of a second water inlet pipe 8, and the other end of the second water inlet pipe 8 penetrates through the house-shaped shell 1 to be communicated with the first water inlet pipe 4; the anti-cracking sleeve 9 is sleeved on the second water outlet pipe 7, wherein the other end of the second water outlet pipe 7 is communicated with the upper end of the converging pipe 10, and the lower end of the converging pipe 10 is communicated with the other end of the first water outlet pipe 3; one end of the shunt tube 11 is communicated with the convergence tube 10, the other end of the shunt tube 11 is communicated with the user delivery tube 12, and the shunt tube 11 is positioned between the convergence tube 10 and the user delivery tube 12; the outer support plate 13 is fixed on the other outer side of the house-shaped shell 1 through screws, and a control box 14 is arranged on the outer support plate 13; the control box 14 comprises a box door 141, a box body 142, a storage battery 143, a controller 144, an overvoltage protector 145, an alarm 146, a touch display screen 147 and a main switch 148, wherein the box door 141 is mounted on one side of the box body 142 through a hinge; a partition board is fixed between the two inner walls of the box body 142 through bolts, a storage battery 143 is placed above the partition board, and a main switch 148 is arranged at the upper end of the storage battery 143 through screws; the controller 144, the overvoltage protector 145 and the alarm 146 are sequentially arranged at the inner lower part of the box body 142, and the touch display screen 147 is mounted at the other side of the box body 142 through screws.
The controller 144 comprises a signal processing module 1441, a display module 1442, a rectifier bridge 1443, a first relay 1444, a second relay 1445, a wireless transmission module 1446 and a CPU1447, wherein the rectifier bridge 1443 is connected with an external power supply through a power line, and the rectifier bridge 1443 is connected with a storage battery 143 through the power line and is also connected with a main switch 148 through a lead; the input terminal of the CPU is connected with a signal processing module 1441 and a display module 1442 through a signal line in sequence, wherein the signal processing module 1441 is connected with the alarm 146 through a signal line, and the display module 1442 is connected with the touch display screen 147 through a signal line; the output terminal of the CPU1447 is connected to a first relay 1444 and a second relay 1445 through a signal line in sequence, wherein the first relay 1444 is connected to a first water pump 2 through the signal line, the second relay 1445 is connected to a second water pump 6 through the signal line, and the first water pump 2 and the second water pump 6 are connected to the overvoltage protector 145 through the signal line respectively; the wireless transmission module 1446 is connected with an output terminal of the CPU1447 through a signal line, and the output terminal of the CPU1447 is connected with the overvoltage protector 145 through a signal line; the models of the first water pump 2 and the second water pump 6 are ISW horizontal pipeline water pumps, the model of the storage battery 143 is GFM-1000, the model of the overvoltage protector 145 is ZYSPD, the model of the alarm 146 is ZH-JDB-1, the model of the touch display screen 147 is DT0 series controllable display screen, the model of the signal processing module 1441 is UDLAN-401, the model of the display module 1442 is UG-2832ALBMG09, the model of the rectifier bridge 1443 is KBPC1010, the models of the first relay 1444 and the second relay 1445 are NR2 and the parameters are 25G/Z13A-25A, the model of the wireless transmission module 1446 is ZM2441PA08, the model of the CPU1447 is AT89S51-24PU, the electric energy required by the system can be effectively provided, the system cannot stop working when an external power supply is interrupted, and the use requirement can be better met, the power consumption and the cost of the selected model are both low, and the work is stable and reliable.
The house-shaped shell 1 is in a house shape made of a rigid material; the whole triangular shape that makes for hard steel material of support frame 5, house shape shell 1 has protected its inside system not receive external damage, and gives sound insulation effect better, and support frame 5 is convenient for second water pump 6's installation to make two play water positions separate, and stability is better, and simple structure is practical.
The number of the anti-cracking sleeves 9 is two, and the anti-cracking sleeves are respectively sleeved on the first water outlet pipe 3 and the second water outlet pipe 7; the anti-cracking sleeve 9 comprises a rubber ring 91, a rubber layer 92 and a steel wire arrangement layer 93, wherein the rubber ring 91 is fixed on one side of the anti-cracking sleeve 9 through screws, and the rubber ring 91 is a connecting part of the anti-cracking sleeve 9 and the first water outlet pipe 3 and the second water outlet pipe 7; rubber layer 92 is the outer wall of crack control cover 9, and the inner wall of rubber layer 92 is steel wire arrangement layer 93, and this steel wire arrangement layer 93 is inside to be made for soft steel wire staggered arrangement, has realized fine sealed to connector department, the phenomenon that can not appear leaking, and can also prevent to lead to the phenomenon of bursting apart the water pipe because the water pressure that goes out is too big, and safety protection nature is high, has improved life.
The three shunt tubes 11 are adopted, one ends of the three shunt tubes 11 are communicated with the convergence tube 10, and the other ends of the three shunt tubes are communicated with the user conveying tube 12, so that the water source is shunted, the pressure of water flow is reduced, the water flow is better conveyed to a user, and the use requirement is met.
Principle of operation
The utility model discloses in, at first operating personnel will first inlet tube 4 insert in the water supply source, then open control box 14 and make its system of putting through by external power source, then open master switch 148, the system begins to operate, the power can make its work of beginning for CPU1447 provides suitable power under rectifier bridge 1443's rectification effect, can also charge to battery 143, operating personnel can set for system's parameter through touch display screen 147, CPU1447 control first water pump 2 works, take water supply source into first inlet tube 4, then carry the water source at first outlet pipe 3 and assemble pipe 10, carry user's conveyer pipe 12 with the water source under shunt tubes 11's effect, when water pressure is too big first water pump 2 excessive pressure, overvoltage protector 145 can protect it, give CPU1447 with the signal transmission, thereby stop first water pump 2's work, alarm 146 can send out the police and then can make its maintenance terminal with the signal transmission for maintenance terminal under wireless transmission module 1446's effect and make its maintenance terminal as early as possible At this moment, the second water pump 6 starts to work, and the second water inlet pipe 8 is communicated with the first water inlet pipe 4, so that the water supply source can be still pumped out to continuously supply water for users, and the phenomenon of water supply cut-off caused by the occurrence of an overpressure phenomenon is avoided.
In whole water supply process, crack control cover 9 has protected first outlet pipe 3 and second outlet pipe 7, can not lead to the phenomenon that the water pipe explodes owing to the pressure of going out water is too big, when external power source has a power failure, because battery 143's effect can still supply power for the system under rectifier bridge 1443's effect, has avoided leading to stopping the phenomenon of supplying water owing to having a power failure to accomplish better whole water supply process.
Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims (5)

1. Overvoltage protection type water supply system, its characterized in that: the water-saving water pump comprises a house-shaped shell (1), a first water pump (2), a first water outlet pipe (3), a first water inlet pipe (4), a support frame (5), a second water pump (6), a second water outlet pipe (7), a second water inlet pipe (8), an anti-cracking sleeve (9), a gathering pipe (10), a flow dividing pipe (11), a user conveying pipe (12), an outer support plate (13) and a control box (14), wherein the first water pump (2) is installed on one side of the inner bottom of the house-shaped shell (1) through a bolt, the water outlet part of the first water pump (2) is communicated with one end of the first water outlet pipe (3), the water pumping part of the first water pump (2) is communicated with one end of the first water inlet pipe (4), and the other end of the first water inlet pipe (4) penetrates through the house-shaped shell (; the support frame (5) is fixed on the inner side of the house-shaped shell (1) through bolts, and a second water pump (6) is installed on the support frame (5) through bolts; the water outlet part of the second water pump (6) is communicated with one end of a second water outlet pipe (7), the water pumping part of the second water pump (6) is communicated with one end of a second water inlet pipe (8), and the other end of the second water inlet pipe (8) penetrates through the house-shaped shell (1) to be communicated with the first water inlet pipe (4); the anti-cracking sleeve (9) is sleeved on the second water outlet pipe (7), wherein the other end of the second water outlet pipe (7) is communicated with the upper end of the convergence pipe (10), and the lower end of the convergence pipe (10) is communicated with the other end of the first water outlet pipe (3); one end of the shunt pipe (11) is communicated with the convergence pipe (10), the other end of the shunt pipe (11) is communicated with the user delivery pipe (12), and the shunt pipe (11) is positioned between the convergence pipe (10) and the user delivery pipe (12); the outer support plate (13) is fixed on the other outer side of the house-shaped shell (1) through screws, and a control box (14) is placed on the outer support plate (13); the control box (14) comprises a box door (141), a box body (142), a storage battery (143), a controller (144), an overvoltage protector (145), an alarm (146), a touch display screen (147) and a main switch (148), wherein the box door (141) is installed on one side of the box body (142) through a hinge; a partition board is fixed between the two inner walls of the box body (142) through bolts, a storage battery (143) is placed above the partition board, and the upper end of the storage battery (143) is provided with a main switch (148) through a screw; the interior lower part of box (142) is equipped with controller (144), overvoltage protector (145) and alarm (146) in proper order, and touch display screen (147) are installed through the screw to the opposite side of box (142).
2. The overvoltage protection water supply of claim 1, wherein: the controller (144) comprises a signal processing module (1441), a display module (1442), a rectifier bridge (1443), a first relay (1444), a second relay (1445), a wireless transmission module (1446) and a CPU (1447), wherein the rectifier bridge (1443) is connected with an external power supply through a power line, and the rectifier bridge (1443) is connected with a storage battery (143) through the power line and is also connected with a main switch (148) through a lead; the input terminal of the CPU is connected with a signal processing module (1441) and a display module (1442) through signal lines in sequence, wherein the signal processing module (1441) is connected with the alarm (146) through the signal lines, and the display module (1442) is connected with the touch display screen (147) through the signal lines; the output terminal of the CPU (1447) is connected with a first relay (1444) and a second relay (1445) sequentially through a signal line, wherein the first relay (1444) is connected with a first water pump (2) through the signal line, the second relay (1445) is connected with a second water pump (6) through the signal line, and the first water pump (2) and the second water pump (6) are connected with the overvoltage protector (145) through the signal line respectively; the wireless transmission module (1446) is connected with an output terminal of the CPU (1447) through a signal line, and the output terminal of the CPU (1447) is connected with the overvoltage protector (145) through the signal line; the first water pump (2) and the second water pump (6) are both ISW horizontal pipeline water pumps, the storage battery (143) is GFM-1000, the overvoltage protector (145) is ZYSPD, the alarm (146) is ZH-JDB-1, the touch display screen (147) is a DT0 series controllable display screen, the signal processing module (1441) is LAN-401, the display module (UD 2) is UG-2832ALBMG09, the rectifier bridge (1443) is BPKC 1010, the first relay (1444) and the second relay (1445) are both NR2 and have parameters of 25G/Z13A-25A, the wireless transmission module (1446) is ZM2441PA08, and the CPU (1447) is PU 89S51-24 AT.
3. The overvoltage protection water supply of claim 1, wherein: the house-shaped shell (1) is in a house shape made of a rigid material; the whole supporting frame (5) is in a triangular shape made of hard steel materials.
4. The overvoltage protection water supply of claim 1, wherein: the anti-cracking sleeves (9) are two in number and are respectively sleeved on the first water outlet pipe (3) and the second water outlet pipe (7); the anti-cracking sleeve (9) comprises a rubber ring (91), a rubber layer (92) and a steel wire arrangement layer (93), wherein the rubber ring (91) is fixed on one side of the anti-cracking sleeve (9) through a screw, and the rubber ring (91) is a connecting part of the anti-cracking sleeve (9) and the first water outlet pipe (3) and the second water outlet pipe (7); the rubber layer (92) is the outer wall of the anti-cracking sleeve (9), the inner wall of the rubber layer (92) is a steel wire arrangement layer (93), and soft steel wires are arranged inside the steel wire arrangement layer (93) in a staggered mode.
5. The overvoltage protection water supply of claim 1, wherein: the number of the shunt tubes (11) is three, one end of each shunt tube (11) is communicated with the corresponding gathering tube (10), and the other end of each shunt tube is communicated with the user conveying pipe (12).
CN201920835437.5U 2019-06-04 2019-06-04 Overvoltage protection type water supply system Expired - Fee Related CN210797729U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920835437.5U CN210797729U (en) 2019-06-04 2019-06-04 Overvoltage protection type water supply system

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Application Number Priority Date Filing Date Title
CN201920835437.5U CN210797729U (en) 2019-06-04 2019-06-04 Overvoltage protection type water supply system

Publications (1)

Publication Number Publication Date
CN210797729U true CN210797729U (en) 2020-06-19

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CN201920835437.5U Expired - Fee Related CN210797729U (en) 2019-06-04 2019-06-04 Overvoltage protection type water supply system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113502909A (en) * 2021-07-26 2021-10-15 中国建筑第二工程局有限公司 Intelligent building energy-saving house and construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113502909A (en) * 2021-07-26 2021-10-15 中国建筑第二工程局有限公司 Intelligent building energy-saving house and construction method
CN113502909B (en) * 2021-07-26 2023-03-07 中国建筑第二工程局有限公司 Intelligent building energy-saving house and construction method

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Granted publication date: 20200619

Termination date: 20210604