CN203960945U - Compensation current stabilization water supply installation - Google Patents
Compensation current stabilization water supply installation Download PDFInfo
- Publication number
- CN203960945U CN203960945U CN201420431107.7U CN201420431107U CN203960945U CN 203960945 U CN203960945 U CN 203960945U CN 201420431107 U CN201420431107 U CN 201420431107U CN 203960945 U CN203960945 U CN 203960945U
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- China
- Prior art keywords
- water
- cavity
- inlet pipe
- water inlet
- water supply
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- Expired - Lifetime
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 202
- 238000009434 installation Methods 0.000 title claims abstract description 22
- 230000006641 stabilisation Effects 0.000 title claims abstract description 21
- 238000011105 stabilization Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 58
- 239000011261 inert gas Substances 0.000 claims abstract description 16
- 230000008676 import Effects 0.000 claims abstract description 13
- 230000001276 controlling effect Effects 0.000 claims abstract description 8
- 239000008400 supply water Substances 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
The utility model relates to compensation current stabilization water supply installation, it comprise be provided with the first cavity and the second cavity regulating tank, water inlet pipe, vacuum suppresser, the first pressure sensor, the second pressure sensor, entering water electromagnetic valve, go out water solenoid valve and controller; The second cavity is communicated with the first cavity by wireway and vacuum suppresser successively; The outlet of water inlet pipe is positioned at described the first cavity, the import of water inlet pipe is positioned at outside described regulating tank and for being connected with water supply line, entering water electromagnetic valve is arranged in water inlet pipe and for controlling the keying of water inlet pipe, and the first pressure sensor is arranged in water inlet pipe and between the water inlet end of entering water electromagnetic valve and the import of water inlet pipe; The bottom of the first cavity offers delivery port, goes out water solenoid valve and is arranged in delivery port and for controlling the keying of described delivery port; The second pressure sensor is arranged in the second cavity; In regulating tank, be filled with inert gas.The effective air conservation of the utility model.
Description
Technical field
The utility model relates to non-negative pressure method of water supply.
Background technology
Along with being on the increase of highrise building, and city tap-water pipe network facilities is constantly perfect, is directly serially connected in running water pipe and laminates arising at the historic moment without negative pressure equipment of water supply on the net.Non-negative pressure water-supply installation compare with traditional secondary water-supply equipment there is energy-conservation, health, the advantage such as floor space is little, convenient management.When water use peak, when tap water influent pressure is not enough, can also realize residual quantity compensation.Existing method is to be greater than tap water inflow when user's water supply volume, and the pressure in flow-compensated tank is during lower than an atmospheric pressure, and the vacuum suppresser being arranged on flow-compensated tank is opened automatically, and air is entered in compensating tank, eliminates vacuum.When compensating tank internal pressure raises, unnecessary Bas Discharged can be made to hold full water in compensating tank again, in order to next water use peak, during the phase, use, in compensating tank, hold after full water, the vacuum suppresser that is arranged on supplementary tank top is closed automatically, prevents overflow.The disadvantage of said method is exactly when flow-compensated, water storage in compensating tank directly contacts with atmosphere, has brought the hidden danger of secondary pollution, and compensating tank is equivalent to the water tank of a cutout, now the inlet-pressure of water pump is zero-pressure, and water pump moves under poor efficiency operating mode.
Utility model content
The purpose of this utility model is to propose a kind of compensation current stabilization water supply installation, and it can solve the problem that water storage pollutes.
In order to achieve the above object, the technical scheme that the utility model adopts is as follows:
Compensation current stabilization water supply installation, it comprises regulating tank, water inlet pipe, vacuum suppresser, the first pressure sensor, the second pressure sensor, entering water electromagnetic valve, goes out water solenoid valve and controller; In described regulating tank, be arranged at intervals with the first cavity and the second cavity, the second cavity is communicated with the first cavity by wireway and vacuum suppresser successively, and described vacuum suppresser is positioned at the top of described the first cavity; The outlet of water inlet pipe is positioned at described the first cavity, the import of water inlet pipe is positioned at outside described regulating tank and for being connected with water supply line, described entering water electromagnetic valve is arranged in water inlet pipe and for controlling the keying of water inlet pipe, and described the first pressure sensor is arranged in water inlet pipe and between the water inlet end of entering water electromagnetic valve and the import of water inlet pipe; The bottom of described the first cavity offers delivery port, described in go out water solenoid valve and be arranged in delivery port and for controlling the keying of described delivery port; Described the second pressure sensor is arranged in the second cavity; In described regulating tank, be filled with inert gas; The first pressure sensor, the second pressure sensor, entering water electromagnetic valve and go out water solenoid valve and be all electrically connected with controller.
Preferably, in described the first cavity, a liquid level sensor is also installed, described liquid level sensor and controller are electrically connected.Further preferred, this compensation current stabilization water supply installation also comprises elbow, and one end of elbow is connected with the outlet of water inlet pipe, and the link position of the outlet of elbow and water inlet pipe is lower than described liquid level sensor.Further preferred again, this compensation current stabilization water supply installation also comprises baffle plate, and the other end of elbow and the top of described baffle plate are hinged.Described elbow is 45 ° of elbows.
Preferably, between the first pressure sensor and the import of water inlet pipe, an automatic air valve is also installed.
Preferably, the pass between the volume of regulating tank and the volume of the second cavity is: P2*V=P1*V2, the first pressure of supply water that P1 is water supply line, P2 is the second pressure of supply water of water supply line, V is the volume of regulating tank, and V2 is the volume of the second cavity, P2>P1.
Preferably, on the second cavity, also offer an inflation inlet.
Preferably, the bottom of regulating tank is also provided with outfall.
The utlity model has following beneficial effect:
The vacuum of regulating tank is eliminated and is realized by vacuum suppresser, when in regulating tank, the first cavity water level declines, vacuum suppresser is opened automatically, thereby reach the pressure balance between the first cavity and the second cavity, the inert gas of being inserted in advance by the second cavity is eliminated the negative pressure of the first cavity, suppress the generation of vacuum, therefore can not cause negative pressure impact to municipal network water supply, do not affect other pipe network user's normal water.Regulating tank has been totally enclosed structure, and the water in regulating tank does not contact with ambient atmosphere, only contact with the inert gas that there is preservation in regulating tank and be insoluble in water, thus effective air conservation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the compensation current stabilization water supply installation of the utility model preferred embodiment.
Reference numeral: 1, the first pressure sensor; 2, entering water electromagnetic valve; 3, vacuum suppresser; 4, the second pressure sensor; 5, water inlet pipe; 6, the second cavity; 7, the first cavity; 8, liquid level sensor; 9, inflation inlet; 10, outfall; 11, elbow; 12, go out water solenoid valve; 13, regulating tank; 14, wireway; 15, baffle plate; 16, automatic air valve.
The specific embodiment
Below, by reference to the accompanying drawings and the specific embodiment, utility model is described further.
As shown in Figure 1, a compensation current stabilization water supply installation, it comprises regulating tank 13, water inlet pipe 5, vacuum suppresser 3, the first pressure sensor 1, the second pressure sensor 4, entering water electromagnetic valve 2, goes out water solenoid valve 12, liquid level sensor 8, elbow 11, baffle plate 15, automatic air valve 16 and controller.
In described regulating tank 13, be arranged at intervals with the first cavity 7 and the second cavity 6, the second cavitys 6 and by wireway 14 and vacuum suppresser 3, be communicated with the first cavity 7 successively, described vacuum suppresser 3 is positioned at the top of described the first cavity 7.
The outlet of water inlet pipe 5 is positioned at described the first cavity 7, the import of water inlet pipe 5 is positioned at outside described regulating tank 13 and for being connected with water supply line (figure does not draw), described entering water electromagnetic valve 2 is arranged in water inlet pipe and for controlling the keying of water inlet pipe 5, and described the first pressure sensor 1 is arranged in water inlet pipe 5 and between the water inlet end of entering water electromagnetic valve 2 and the import of water inlet pipe 5.Automatic air valve 16 is arranged between the first pressure sensor 1 and the import of water inlet pipe 5.
The bottom of described the first cavity 7 offers delivery port and outfall 10, described in go out water solenoid valve 12 and be arranged in delivery port and for controlling the keying of described delivery port.Water discharging valve (figure does not mark) is also installed in outfall 10.
Described the second pressure sensor 4 is arranged in the second cavity 6.In described regulating tank 13, be filled with inert gas, the inert gas of the present embodiment can be nitrogen.
Liquid level sensor 8 is arranged in the first cavity 7.One end of elbow 11 is connected with the outlet of water inlet pipe 5, and the top of the other end of elbow 11 and described baffle plate 15 is hinged, and the link position of the outlet of elbow 11 and water inlet pipe 5 is lower than described liquid level sensor 8.The elbow 11 of the present embodiment adopts 45 ° of elbows.
Relation between the volume of the volume of regulating tank 13 and the second cavity 6 meets Boyle's law (quantitative gas in closed container, under constant temperature, the pressure of gas and the volume relation that is inversely proportional to).Pass between the volume of the volume of regulating tank 13 and the second cavity 6 is: P2*V=P1*V2, P1 is the first pressure of supply water of water supply line, the second pressure of supply water that P2 is water supply line, and V is the volume of regulating tank 13, V2 is the volume of the second cavity 6, P2>P1.
On the second cavity 6, also offer an inflation inlet 9, in described inflation inlet 9, charging valve is also installed.
The first pressure sensor 1, the second pressure sensor 4, liquid level sensor 8, entering water electromagnetic valve 2 and go out water solenoid valve 12 and be all electrically connected with controller.
The vacuum of regulating tank 13 is eliminated and is realized by vacuum suppresser 3, when in regulating tank 13, the first cavity 7 water levels decline, vacuum suppresser 3 is opened automatically, thereby reach the pressure balance between the first cavity 7 and the second cavity 6, the inert gas of being inserted in advance by the second cavity 6 is eliminated the negative pressure of the first cavity 7, suppress the generation of vacuum, therefore can not cause negative pressure impact to municipal network water supply, do not affect other pipe network user's normal water.Regulating tank 13 has been totally enclosed structures, and the water in regulating tank 13 does not contact with ambient atmosphere, only contact with the inert gas that there is preservation in regulating tank 13 and be insoluble in water, thus effective air conservation.
The present embodiment also discloses a kind of control method of compensation current stabilization water supply installation, and it comprises the following steps:
Step 1, before passing into municipal water, by 10 pairs of the first cavitys 7 of outfall, clean, close entering water electromagnetic valve 2 and go out water solenoid valve 12, by being filled with in advance inert gas in 9 pairs of regulating tanks 13 of inflation inlet, so that the first gas pressure in described regulating tank 13 equates with the first pressure of supply water of water supply line, now in described regulating tank 13, be described inert gas.
Step 2, controller, according to the pressure signal of the first pressure sensor 1 output, judge whether the current pressure of supply water of water supply line is greater than the first pressure of supply water, if so, perform step 3, otherwise, close described entering water electromagnetic valve 2.
Step 3, open entering water electromagnetic valve 2, so that water enters the first cavity 7 along water inlet pipe 5, thereby all inert gases in the first cavity 7 are compressed into the second cavity 6 along vacuum suppresser 3, wireway 14 successively, until water is full of the first cavity 7, vacuum suppresser 3 is closed automatically, now the second gas pressure in the second cavity 6 equates with the second pressure of supply water of water supply line, and wherein, the second pressure of supply water is greater than the first pressure of supply water.The first pressure of supply water is the protection pressure of water supply line, the normal water supply pressure that the second pressure of supply water is water supply line.
Step 4, controller are according to the pressure signal of the first pressure sensor 1 and the second pressure sensor 4 outputs, when determining the current pressure of supply water of water supply line, be more than or equal to the first pressure of supply water, and when the gas pressure in the second current cavity 6 is the second gas pressure, open out water solenoid valve 12, water supply line externally supplies water by regulating tank 13.
Step 5, when in water supply process, if during the water shortage of water supply line, the pressure drop of the first cavity 7, when namely the current pressure of supply water of water supply line is less than or equal to the second gas pressure, vacuum suppresser 3 is opened automatically, so that the inert gas in the second cavity 6 enters in the first cavity 7 along wireway 14, vacuum suppresser 3 successively, until the gas pressure in the second cavity 6 equates with the gas pressure in the first cavity 7.
When if the current pressure of supply water of step 6 water supply line is less than or equal to the first gas pressure or water supply line cut off the water and cause the water level in the first cavity 7 of regulating tank 13 constantly to decline, when the liquid level in the first cavity 7 drops to the measuring position of liquid level sensor 8, controller cuts out out water solenoid valve 12.Because being filled with inert gas in advance, regulating tank 13 there is the first gas pressure, when so the current pressure of supply water of water supply line is less than or equal to the first gas pressure, water in water supply line cannot enter in regulating tank 13, the water that outside equipment cannot extract in water supply line by regulating tank 13, therefore can not produce negative pressure impact to city planting ductwork.
The effect one of vacuum suppresser 3 is gas that the pressure of supply water at water supply line is not enough to that the first cavity 7 is filled with in advance while being pressed into the second cavity 6, keeps the second cavity 6 of regulating tank 13, the pressure balance between the first cavity 7.The effect two of vacuum suppresser 3 is gas that the pressure of supply water at water supply line is enough to that the first cavity 7 is filled with in advance while being pressed into the second cavity 6, guarantees that the water of the first cavity 7 can not enter in the second cavity 6, guarantees that the second cavity 6 is interior forever to only have gas.
Step 7, when going out water solenoid valve 12, close, when the pressure signal of the second pressure sensor 4 outputs is less than the first gas pressure, controller is exported the first alarm signal to an alarm module, with the inert gas in prompting regulating tank 13, reduce, need to inflate by 9 pairs of regulating tanks 13 of inflation inlet, with topping up.
In order to judge whether operation irregularity of vacuum suppresser 3, performing step 2 to the process of step 5, can also carry out following steps: when the pressure signal that is greater than the second gas pressure and the second pressure sensor 4 outputs when the current pressure of supply water of water supply line is less than the pressure signal of the first pressure sensor 1 output simultaneously, or when the pressure signal that is less than the second gas pressure and the second pressure sensor 4 outputs when the current pressure of supply water of water supply line equals the pressure signal of the first pressure sensor 1 output, controller is exported the second alarm signal to an alarm module, with prompting vacuum suppresser 3 operation irregularities.
The alarm module of the present embodiment can be display, loudspeaker etc.
The know-why that the gas that regulating tank 13 inside are filled with is in advance realized anti-pollution anti-leak is as follows:.
(1) regulating tank 13 is divided into two chambers: the second cavity 6 and the first cavity 7.Wherein the second cavity 6 is air storing cavity, and the first cavity 7 is water storage cavity, and both are connected by vacuum suppresser 3, and wherein the interior gas of the first cavity 7 is the inert gas that has preservation and be insoluble in water, and the reserved gas of the second cavity 6 plays a part to suppress negative pressure.Gas when the interior water level of the first cavity 7 declines in the second cavity 6 will be directed to because of the effect of pressure differential in the first cavity 7, realizes pressure balance.When the interior liquid level of the first cavity 7 constantly rises, the gas in the first cavity 7 carries out stored for future use in compressed time the second cavity 6 again.
(2), when preventing that city planting ductwork outside gas after cutting off the water from entering pressure of supply water that regulating tank 13, the first pressure sensors 1 detect water supply line lower than the first pressure of supply water, entering water electromagnetic valve 2 is closed.When municipal water supplies at once again, the gas automatic-discharging that automatic air valve 16 may exist entering water electromagnetic valve 2 front end pipe networks.When the pressure of supply water that the first pressure sensor 1 detects water supply line is greater than the first pressure of supply water, entering water electromagnetic valve 2 is opened, and municipal water enters regulating tank 13.
(3) for to prevent that city planting ductwork gas leakage in regulating tank 13 after cutting off the water, the present embodiment have the safeguard measure of following three aspects::
(A) for preventing that the gas in regulating tank 13 from being revealed by delivery port, liquid level sensor 8 is set.Water level in the first cavity 7 constantly drops to the liquid level protection value of liquid level sensor 8, goes out water solenoid valve 12 and closes, and stops supplying water to outside, and water is still left in regulating tank 13 bottoms, stops gas to be revealed from delivery port.
(B) for preventing that the gas in regulating tank 13 from being revealed by the import of water inlet pipe 5; water inlet pipe 5 extends perpendicularly to regulating tank 13 bottoms; the end of water inlet pipe 5 adopts 45 ° of elbows 11 to be connected with baffle plate 15, and the peak of 45 ° of elbows 11 of end of water inlet pipe 5 must be lower than the liquid level protection value of liquid level sensor 8.When the water level in the first cavity 7 constantly drops to the protection value of liquid level sensor 8, be still full of water in the bottom of water inlet pipe 5, the gas in regulating tank 13 can not revealed from the import of water inlet pipe 5.
(C) entering water electromagnetic valve 2 and go out water solenoid valve 12 and all adopt power-off closed type electromagnetic valve.Object is entering water electromagnetic valve 2, go out water solenoid valve 12 can close the in the situation that of power-off, and the gas in protection regulating tank 13 can not revealed because of power-off suddenly.
The end of water inlet pipe 5 adopts 45 ° of elbows 11 to connect, and prevents that on the one hand when municipal water from entering regulating tank 13, directly impacting tank base produces noise.By the municipal water of 45 ° of elbows, 11 guiding, enter in tank on the other hand, reduce municipal water and enter the resistance in tank, make full use of the original pressure of municipal water.
Because electromagnetic valve cannot cut out when outlet pressure is greater than inlet pressure.So when the pressure of supply water of water supply line is less than the first gas pressure, entering water electromagnetic valve 2 need to be closed.But because the gas pressure in tank is greater than pressure of supply water, entering water electromagnetic valve 2 cannot be closed.Now the baffle plate 15 of end increase at 45 ° of elbows 11 can stop the gas pressure in tank to be delivered to entering water electromagnetic valve 2 places by water inlet pipe 5.Had baffle plate 15, just closing of entering water electromagnetic valve 2 easily realizes.
In addition, above-described embodiment can also not arrange inflation inlet 9 and outfall 10.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion all should belong to the protection domain of the utility model claim within.
Claims (9)
1. compensation current stabilization water supply installation, is characterized in that, comprises regulating tank, water inlet pipe, vacuum suppresser, the first pressure sensor, the second pressure sensor, entering water electromagnetic valve, goes out water solenoid valve and controller; In described regulating tank, be arranged at intervals with the first cavity and the second cavity, the second cavity is communicated with the first cavity by wireway and vacuum suppresser successively, and described vacuum suppresser is positioned at the top of described the first cavity; The outlet of water inlet pipe is positioned at described the first cavity, the import of water inlet pipe is positioned at outside described regulating tank and for being connected with water supply line, described entering water electromagnetic valve is arranged in water inlet pipe and for controlling the keying of water inlet pipe, and described the first pressure sensor is arranged in water inlet pipe and between the water inlet end of entering water electromagnetic valve and the import of water inlet pipe; The bottom of described the first cavity offers delivery port, described in go out water solenoid valve and be arranged in delivery port and for controlling the keying of described delivery port; Described the second pressure sensor is arranged in the second cavity; In described regulating tank, be filled with inert gas; The first pressure sensor, the second pressure sensor, entering water electromagnetic valve and go out water solenoid valve and be all electrically connected with controller.
2. compensation current stabilization water supply installation as claimed in claim 1, is characterized in that, in described the first cavity, a liquid level sensor is also installed, and described liquid level sensor and controller are electrically connected.
3. compensation current stabilization water supply installation as claimed in claim 2, is characterized in that, this compensation current stabilization water supply installation also comprises elbow, and one end of elbow is connected with the outlet of water inlet pipe, and the link position of the outlet of elbow and water inlet pipe is lower than described liquid level sensor.
4. compensation current stabilization water supply installation as claimed in claim 3, is characterized in that, this compensation current stabilization water supply installation also comprises baffle plate, and the other end of elbow and the top of described baffle plate are hinged.
5. compensation current stabilization water supply installation as claimed in claim 3, is characterized in that, described elbow is 45 ° of elbows.
6. compensation current stabilization water supply installation as claimed in claim 1, is characterized in that, between the first pressure sensor and the import of water inlet pipe, an automatic air valve is also installed.
7. compensation current stabilization water supply installation as claimed in claim 1, it is characterized in that, pass between the volume of the volume of regulating tank and the second cavity is: P2*V=P1*V2, P1 is the first pressure of supply water of water supply line, P2 is the second pressure of supply water of water supply line, V is the volume of regulating tank, and V2 is the volume of the second cavity, P2>P1.
8. compensation current stabilization water supply installation as claimed in claim 1, is characterized in that, also offers an inflation inlet on the second cavity.
9. compensation current stabilization water supply installation as claimed in claim 1, is characterized in that, the bottom of regulating tank is also provided with outfall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420431107.7U CN203960945U (en) | 2014-07-31 | 2014-07-31 | Compensation current stabilization water supply installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420431107.7U CN203960945U (en) | 2014-07-31 | 2014-07-31 | Compensation current stabilization water supply installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203960945U true CN203960945U (en) | 2014-11-26 |
Family
ID=51921546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420431107.7U Expired - Lifetime CN203960945U (en) | 2014-07-31 | 2014-07-31 | Compensation current stabilization water supply installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203960945U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141330A (en) * | 2014-07-31 | 2014-11-12 | 广州广一泵业有限公司 | Compensation type flow stabilizing and water supplying device and control method thereof |
-
2014
- 2014-07-31 CN CN201420431107.7U patent/CN203960945U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141330A (en) * | 2014-07-31 | 2014-11-12 | 广州广一泵业有限公司 | Compensation type flow stabilizing and water supplying device and control method thereof |
| CN104141330B (en) * | 2014-07-31 | 2015-09-30 | 广州广一泵业有限公司 | Compensation current stabilization water supply installation and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |
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| CX01 | Expiry of patent term |