CN201158836Y - Pressure-compensating water supply device without additional influence to common ductwork hydraulic pressure - Google Patents
Pressure-compensating water supply device without additional influence to common ductwork hydraulic pressure Download PDFInfo
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- CN201158836Y CN201158836Y CNU2007201291531U CN200720129153U CN201158836Y CN 201158836 Y CN201158836 Y CN 201158836Y CN U2007201291531 U CNU2007201291531 U CN U2007201291531U CN 200720129153 U CN200720129153 U CN 200720129153U CN 201158836 Y CN201158836 Y CN 201158836Y
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Abstract
The utility model discloses a pressure-supplementing water supply device which does not influence the water pressure of public pipe networks, which comprises at least an apparatus main body, an inlet valve, an outlet valve, a by-pass one-way valve, a first breather valve, a second breather valve, a limit low-pressure gage (8), a water deficiency protection device, a water outlet pressure sensor and at least a control device. The pressure-supplementing water supply device does not pass through a pool and a water tank, which does not stabilize pressure by a pressure stabilization tank, and directly gets water to pressurize from a public pipe network by a totally-sealed immersible electric pump. The pressure-supplementing water supply device does not lower the pressure of a public pipe network to achieve water supply with stabilized pressure, which does not pollute water quality, automatically runs, and saves more energy and more land.
Description
Technical field
The utility model relates to secondary water supply, relates more specifically to not the ftercompction water supply installation and the method for the public pipe network water pressure of additional effect.
Background technology
From the patent No. is 98220256.3, after denomination of invention is " pressurization water supply tank " license, has developed " JS series secondary water supply " in view of the above.The Ministry of Construction in 2002, Department of Science and Technology's approval classify populariztion of scientific and technical result project and the state key planning item of popularizing scientific and technological achievements as with " JS device ", now existing tens kinds of similar launch products, second pressure water supply technology anti-pollution, energy-conservation source is rapidly developed.But, still rest on the technological phase of anti-negative pressure, no negative pressure so far.For example, the patent No. be 200620023598.7 denominations of invention for the patented technology of " simulating the online water supply installation of float valve water inlet automatically " be preferentially to control according to the water yield that can come in, hydraulic pressure, the water yield that guarantees customer requirements do not proposed feasible measure, but how much water inlet channel have, can give how much water, just for how much water.The hydraulic pressure of control inlet channel is not less than zero, negative pressure do not occur.The patent No. is 200520023993.0, denomination of invention is when intaking scarce capacity for the technology of " level pressure compensates secondary water supply automatically ", the part of pressure (hydraulic) water is back to inlet channel, replenish with the water after the pressurization when coming water not enough exactly, forming the circulation of the water outlet of pump to water inlet, obviously is irrational.Be now: establish vacuum tank and replenish certain water yield (per hour be about output 3%), make pipe network negative pressure not occur as far as possible, just shut down during additional water shortage than widespread usage.This technology for the voltage stabilizing water of the water yield about 3% that obtains per hour to pressurize, must be installed a stress metal jar; The lift of pressurized equipment need increase by 20 meters (seeing the A value of accompanying drawing 3) approximately, plant capacity, power consumption and take up room and all want corresponding increase.
Like this, though can prevent that negative pressure from appearring in common-use tunnel, can make near the low layer user of pressurized equipment anhydrous sometimes.This is the problem of generally worrying, also is the major reason that is difficult to popularize in an all-round way this technology so far.In addition, only prevent negative pressure, 20 meters of city planting ductworks, 30 meters head can not be made full use of; Must increase pressurized equipment power; Also increase vacuum tank and installed and antifreeze difficulty, be unfavorable for energy-saving and environmental protection.
Summary of the invention
The purpose of this utility model is to overcome the defective that exists in the above-mentioned prior art, and the ftercompction water supply installation and the method for a kind of not extra (referring to: remove the frictional resistance that increases because of the water yield) the public pipe network water pressure of influence is provided.Described ftercompction water supply installation realizes that by the following technical solutions described ftercompction water supply installation comprises:
At least one equipment body, this equipment body comprises motor and water pump and one way valve, this equipment body is connected with outlet valve with water intaking valve respectively, is used for the pressurization to water;
Water intaking valve, this water intaking valve is connected with water inlet pipe with equipment body, is used for the water inlet of control appliance main body;
Outlet valve, this outlet valve and equipment body are connected with the outlet pipe of its upper end, and the lower end that one way valve is installed in outlet valve is used to prevent the backflow of supplying water;
The bypass one way valve, this bypass one way valve is connected between equipment body and the outlet pipe by pipeline, when this bypass one way valve is used for motor and water pump and does not move, is directly supplied water to outlet pipe low pressure without water pump by water inlet pipe;
First breather valve, this first breather valve is connected between water intaking valve and the equipment body, is used for the air inlet or the exhaust of inlet channel;
Second breather valve, this second breather valve are connected between the upper end and outlet valve lower end of equipment body, are used for the exhaust to equipment body;
The limit low-pressure meter, this limit low-pressure meter is connected between water intaking valve and the equipment body, and the information that is used to detect the pressure of water inlet and produces water inlet water supply low pressure is transferred to control device by signal cable with this information;
The excessive low water level protection device, this excessive low water level protection device is connected between water intaking valve and the equipment body, is used in the water inlet pipe the whether detection of lack of water, sends the information that obtains to control device by signal cable motor and water pump is controlled, water system is protected;
The discharge pressure sensor, this discharge pressure sensor is connected between outlet valve and the equipment body, the data message that is used to detect the pressure at the mouth of a river and produces mouth of a river water pressure, and this information is transferred to control device by signal cable, motor and water pump is controlled.
Can one way valve be placed within the equipment body as required yet, but one way valve is connected with equipment body, be installed in the lower end of outlet valve, be used to prevent the backflow of supplying water and cut down water hammer that in this case, described ftercompction water supply installation comprises:
At least one equipment body, this equipment body comprises motor and water pump, this equipment body is connected with outlet valve with water intaking valve respectively, is used for the pressurization to water;
Water intaking valve, this water intaking valve is connected with water inlet pipe with equipment body, is used for the water inlet of control appliance main body;
Outlet valve, this outlet valve is connected with the outlet pipe of equipment body with its upper end, is used for the water outlet of control appliance main body;
One way valve, this one way valve is connected with equipment body, is installed in the lower end of outlet valve, is used to prevent the backflow of supplying water and cuts down water hammer;
The bypass one way valve, this bypass one way valve is connected between equipment body and the outlet pipe by pipeline, when this bypass one way valve is used for motor and water pump and does not move, is directly supplied water to outlet pipe low pressure without water pump by water inlet pipe;
First breather valve, this first breather valve is connected between water intaking valve and the equipment body, is used for the air inlet or the exhaust of inlet channel;
Second breather valve, this second breather valve are connected between the upper end and outlet valve lower end of equipment body, are used for the exhaust to equipment body;
The limit low-pressure meter, this limit low-pressure meter is connected between water intaking valve and the equipment body, and the information that is used to detect the pressure of water inlet and produces water inlet water supply low pressure is transferred to control device by signal cable with this information;
The excessive low water level protection device, this excessive low water level protection device is connected between water intaking valve and the equipment body, is used in the water inlet pipe the whether detection of lack of water, sends the information that obtains to control device by signal cable motor and water pump is controlled, water system is protected;
The discharge pressure sensor, this discharge pressure sensor is connected between outlet valve and the equipment body, the data message that is used to detect the pressure at the mouth of a river and produces mouth of a river water pressure, and this information is transferred to control device by signal cable, motor and water pump is controlled;
At least one control device; only need manually the close air switch energising of this control device; the pressure of supply water information of receiving by its automatic detectability low-pressure meter, discharge pressure sensor and excessive low water level protection device, to the ftercompction water supply installation start, acceleration, deceleration, dormancy, wake up, control that speed is stopped.
Described control device comprises frequency converter, cyclelog, lack of water controller, pressure-regulating device and power supply, and this control device is used for the information according to limit low-pressure meter, the detected pressure of supply water of discharge pressure sensor, and secondary water supply is controlled.
A kind of ftercompction water supply installation that the utility model relates to is without pond, water tank, without the vacuum tank voltage stabilizing, use up hermetic submersible pump directly from public pipe network water intaking pressurization: additionally do not reduce public ductwork pressure and realize pressure-stabilizing water supply, not polluted water, operation automatically, more energy-conservation, economize ground.
Below in conjunction with accompanying drawing the technical solution of the utility model is described further, can be understood essence of the present utility model and advantage better.
Description of drawings
Fig. 1, be ftercompction water supply installation structural representation of the present utility model.
Fig. 2, be ftercompction water supply installation working procedure schematic diagram of the present utility model.
Fig. 3, be the control effect schematic diagram of ftercompction water supply installation of the present utility model.
Fig. 4, be that the control device that uses in the ftercompction water supply installation of the present utility model constitutes schematic diagram.
The specific embodiment
Fig. 1, be ftercompction water supply installation structural representation of the present utility model (all by vertical installation statement).In this Fig. 1, the content of the mark of use representative is: 1-water intaking valve, 2-one way valve, 3-equipment body; the 4-motor and water pump, 5-bypass one way valve, 6-outlet valve, 7-1-first breather valve; 7-2-second breather valve, 8-limits low-pressure meter, 9-discharge pressure sensor; the 10-signal cable, 11-excessive low water level protection device, 12-power cable; the 13-trap, 14-Counterflow-proof device, 15-water inlet pipe; the 16-outlet pipe, 17-municipal public use pipeline, 18-control device.The identical in the drawings identical content of mark representative.
As shown in Figure 1, described ftercompction water supply installation comprises:
At least one equipment body (3), this equipment body (3) comprise motor and water pump (4) and one way valve (2), and this equipment body (3) is connected with outlet valve (6) with water intaking valve (1) respectively, is used for the pressurization to water;
Water intaking valve (1), this water intaking valve (1) is connected with water inlet pipe (15) with equipment body (3), is used for the water inlet of control appliance main body (3);
Outlet valve (6), this outlet valve (6) is connected with the outlet pipe (16) of equipment body (3) with its upper end, is used for the water outlet of control appliance main body (3);
Bypass one way valve (5), this bypass one way valve (5) is connected between equipment body (3) and the outlet pipe (16) by pipeline, this bypass one way valve (5) is used for motor and water pump (4) when not moving, and is directly supplied water to outlet pipe (17) low pressure without water pump by water inlet pipe (16);
First breather valve (7-1), the 1st breather valve (7-1) are connected between water intaking valve (1) and the equipment body (3), are used for the air inlet or the exhaust of inlet channel;
Second breather valve (7-2), this second breather valve (7-2) are connected between the upper end and outlet valve (6) lower end of equipment body (3), are used for the exhaust to equipment body;
Limit low-pressure meter (8), this limit low-pressure meter (8) is connected between water intaking valve (1) and the equipment body (3), and the information that is used to detect the pressure of water inlet and produces water inlet water supply low pressure is transferred to control device (18) by signal cable (10) with this information;
Excessive low water level protection device (11), this excessive low water level protection device (11) is connected between water intaking valve (1) and the equipment body (3), be used in the water inlet pipe the whether detection of lack of water, send the information that obtains to control device (18) by signal cable motor and water pump (4) is controlled, water system is protected;
Discharge pressure sensor (9), this discharge pressure sensor (9) is connected between outlet valve (6) and the equipment body (3), the data message that is used to detect the pressure at the mouth of a river and produces mouth of a river water pressure, and this information is transferred to control device (18) by signal cable (10), motor and water pump is controlled;
At least one control device (18); this control device (18) air switch energising of only need manually closing; by its automatic detectability low-pressure meter (8), discharge pressure sensor (9) and excessive low water level protection device (11) to pressure of supply water information, to the ftercompction water supply installation start, acceleration, deceleration, dormancy, wake up, control that speed is stopped.
Also can one way valve be placed within the equipment body as required and (not draw among Fig. 1), but one way valve is connected with equipment body, be installed in the lower end of outlet valve, be used to prevent the backflow of supplying water and cut down water hammer, in this case, described ftercompction water supply installation comprises:
At least one equipment body (3), this equipment body (3) comprises motor and water pump (4), this equipment body (3) is connected with outlet valve (6) with water intaking valve (1) respectively, is used for the pressurization to water;
Water intaking valve (1), this water intaking valve (1) is connected with water inlet pipe (15) with equipment body (3), is used for the water inlet of control appliance main body (3);
Outlet valve (6), this outlet valve (6) is connected with the outlet pipe (16) of equipment body (3) with its upper end, is used for the water outlet of control appliance main body (3);
One way valve (2), this one way valve (2) is connected with equipment body (3), is installed in the lower end of outlet valve (6), is used to prevent the backflow of supplying water and cuts down water hammer;
Bypass one way valve (5), this bypass one way valve (5) is connected between equipment body (3) and the outlet pipe (17) by pipeline, this bypass one way valve (5) is used for motor and water pump (4) when not moving, and is directly supplied water to outlet pipe (16) low pressure without water pump by water inlet pipe (16);
First breather valve (7-1), the 1st breather valve (7-1) are connected between water intaking valve (1) and the equipment body (3), are used for the air inlet or the exhaust of inlet channel;
Second breather valve (7-2), this second breather valve (7-2) are connected between the upper end and outlet valve (6) lower end of equipment body (3), are used for the exhaust to equipment body;
Limit low-pressure meter (8), this limit low-pressure meter (8) is connected between water intaking valve (1) and the equipment body (3), and the information that is used to detect the pressure of water inlet and produces water inlet water supply low pressure is transferred to control device (18) by signal cable (10) with this information;
Excessive low water level protection device (11), this excessive low water level protection device (11) is connected between water intaking valve (1) and the equipment body (3), be used in the water inlet pipe the whether detection of lack of water, send the information that obtains to control device (18) by signal cable motor and water pump (4) is controlled, water system is protected;
Discharge pressure sensor (9), this discharge pressure sensor (9) is connected between outlet valve (6) and the equipment body (3), the data message that is used to detect the pressure at the mouth of a river and produces mouth of a river water pressure, and this information is transferred to control device (18) by signal cable (10), motor and water pump is controlled;
At least one control device (18); this control device (18) air switch energising of only need manually closing; by its automatic detectability low-pressure meter (8), discharge pressure sensor (9) and excessive low water level protection device (11) to pressure of supply water information, to the ftercompction water supply installation start, acceleration, deceleration, dormancy, wake up, control that speed is stopped.
In addition, as required trap (13) and Counterflow-proof device (14) can also be installed between water inlet pipe (15) and municipal public use pipeline (17), so that improve quality, the guarantor's water supply security that supplies water.
Fig. 2, be ftercompction water supply installation working procedure schematic diagram of the present utility model.As shown in Figure 2:
The ftercompction water supply ftercompction water supply installation working procedure step of the public pipe network water pressure of described a kind of not additional effect comprises:
Also will monitor the data message of water inlet water supply low pressure by the pressure of limit low-pressure meter detection water inlet, by signal cable this information is transferred to control device, whether the pressure of judging water inlet is more than or equal to setting low voltage value, if judged result negates to wait for that then limit low-pressure meter pressure detecting meets the requirements; If judged result is sure, then secondary water supply enters and starts and accelerated procedure;
By the discharge pressure sensor, detect the pressure at the mouth of a river and, this information is transferred to control device by signal cable with the data message of delivery port water pressure of monitoring, judge water pressure and whether be higher than setting pressure, if judged result is sure, then wait for; If judged result negates, then secondary water supply enters startup and acceleration, speed governing program;
Be transferred to the signal of control device by the excessive low water level protection device; If judged result is sure, then the ftercompction water supply installation enters and starts and accelerated procedure;
If above 1 to 3 step all enters start and accelerated procedure, then control device control water booster system starts acceleration, speed governing.
Whether operating voltage and electric current that control device detects secondary water supply be normal, if judged result negates then to enter the program of self-starting 3 times; If judged result is sure, then enter normal ftercompction water supply program;
In the program that self-starting is 3 times, if judged result negate, then enter repair procedure, if judged result is sure, then enter normal ftercompction water supply program;
In normal ftercompction is supplied water, if continuous 50 seconds, the 30HZ low-frequency operation then enters dormancy standby program; If a small amount of water, step-down reaches 0.05Mpa, then recovers pressurization and supplies water.
Fig. 3, be the control effect schematic diagram of ftercompction water supply installation of the present utility model.As shown in Figure 3, a part of without the direct direct-furnish user waters such as (20) of pressurization from common-use tunnel (17) access tap water, through metering water meter (19), a part of and pressurized equipment main body (3) connection pressurization is supplied water, for user's waters such as (21).Because the voltage stabilizing function of present technique, the pressurization elevation that makes equipment, have been saved the A section that need begin to pressurize from zero pressure only for the B section of Fig. 3 gets final product.
Hydraulic pressure (A) is constant substantially from the beginning, and the pressurization lift is kept to (B) by (A+B) shown in the figure, and (19) following user's water is unaffected among the figure, and installed power and power consumption descend significantly, takes up an area of space and noise and descends thereupon.Former " pressurization water supply tank " patent has had the part voltage stabilizing function, but unstable.Improvement of the present invention improves can stablize the realization pressure-stabilizing water supply, and no longer be constantly prevent negative pressure-because present technique stable away from rice surplus the negative pressure ten.
Fig. 4, be that the control device that uses in the ftercompction water supply installation of the present utility model constitutes schematic diagram.As shown in Figure 4,
Described control device (18), comprise frequency converter, cyclelog, lack of water controller, pressure-regulating device and power supply, this control device (18) is used for the data message according to limit low-pressure meter (8), the detected pressure of supply water of discharge pressure sensor (9), and secondary water supply is controlled.
With the power frequency supply access control apparatus; air switch only need close; pass through to detect water-in and water-out pressure by program controller; sensors such as electric current, voltage and excessive low water level protection; automatically whether whether detection should move and can move; send out, stop, acceleration, deceleration, dormancy, wake up and speed such as stops at instruction by control device, make the safe operation of pressurization supply equipment.
After above-mentioned every the installing, the per 4 milliseconds of samplings of reference once also can be differentiated the special pressure recorder of 0.001Mpa, setting program and debugging, optimization, the pressure-stabilizing water supply of the no vacuum tank of realization, the not hydraulic pressure of additional effect urban pipe network.
In sum, ftercompction water supply installation of the present utility model constitutes, provided general technical scheme, existing secondary water supply constitutes to be described in detail, those skilled in the art can make amendment to its concrete formation according to described scheme, for example the form of structure of the lead-out mode of the interface mode of pipeline, cable, outlet valve and anti-lack of water sensor formations such as (with float switch or metal electrode) and connected mode thereof are made amendment, these all do not break away from the utility model claims restricted portion.
Claims (6)
1. ftercompction water supply installation of the public pipe network water pressure of additional effect not is characterized in that described ftercompction water supply installation comprises:
At least one equipment body (3), this equipment body (3) comprise motor and water pump (4) and one way valve (2), and this equipment body (3) is connected with outlet valve (6) with water intaking valve (1) respectively, is used for the pressurization to water;
Water intaking valve (1), this water intaking valve (1) is connected with water inlet pipe (15) with equipment body (3), is used for the water inlet of control appliance main body (3);
Outlet valve (6), this outlet valve (6) is connected with the outlet pipe (16) of equipment body (3) with its upper end, is used for the water outlet of control appliance main body (3);
Bypass one way valve (5), this bypass one way valve (5) is connected between equipment body (3) and the outlet pipe (16) by pipeline, this bypass one way valve (5) is used for motor and water pump (4) when not moving, and is directly supplied water to outlet pipe (16) low pressure without water pump by water inlet pipe (15);
First breather valve (7-1), this first breather valve (7-1) is connected between water intaking valve (1) and the equipment body (3), is used for the air inlet or the exhaust of inlet channel;
Second breather valve (7-2), this second breather valve (7-2) are connected between the upper end and outlet valve (6) lower end of equipment body (3), are used for the exhaust to equipment body;
Limit low-pressure meter (8), this limit low-pressure meter (8) is connected between water intaking valve (1) and the equipment body (3), and the information that is used to detect the pressure of water inlet and produces water inlet water supply low pressure is transferred to control device (18) by signal cable (10) with this information;
Excessive low water level protection device (11), this excessive low water level protection device (11) is connected between water intaking valve (1) and the equipment body (3), be used in the water inlet pipe the whether detection of lack of water, send the information that obtains to control device (18) by signal cable (10) motor and water pump (4) is controlled, water system is protected;
Discharge pressure sensor (9), this discharge pressure sensor (9) is connected between outlet valve (6) and the equipment body (3), the data message that is used to detect the pressure at the mouth of a river and produces mouth of a river water pressure, and this information is transferred to control device (18) by signal cable (10), motor and water pump is controlled;
At least one control device (18); this control device (18) air switch energising of only need manually closing; by its automatic detectability low-pressure meter (8), discharge pressure sensor (9) and excessive low water level protection device (11) to pressure of supply water information, to the ftercompction water supply installation start, acceleration, deceleration, dormancy, wake up, control that speed is stopped.
2. ftercompction water supply installation according to claim 1; it is characterized in that: described control device (18); comprise frequency converter, cyclelog, lack of water controller, pressure-regulating device and power supply; this control device (18) is used for according to limit low-pressure meter (8), discharge pressure sensor (9) and excessive low water level protection device (11); detected pressure of supply water information is controlled secondary water supply.
3. ftercompction water supply installation according to claim 1 and 2 is characterized in that: trap (13) and Counterflow-proof device (14) are installed, for use in improving the quality that supplies water between water inlet pipe (15) and municipal public use pipeline (17).
4. ftercompction water supply installation of the public pipe network water pressure of additional effect not is characterized in that described ftercompction water supply installation comprises:
At least one equipment body (3), this equipment body (3) comprises motor and water pump (4), this equipment body (3) is connected with outlet valve (6) with water intaking valve (1) respectively, is used for the pressurization to water;
Water intaking valve (1), this water intaking valve (1) is connected with water inlet pipe (15) with equipment body (3), is used for the water inlet of control appliance main body (3);
Outlet valve (6), this outlet valve (6) is connected with the outlet pipe (16) of equipment body (3) with its upper end, is used for the water outlet of control appliance main body (3);
One way valve (2), this one way valve (2) is connected with equipment body (3), is installed in the lower end of outlet valve (6), is used to prevent the backflow of supplying water and cuts down water hammer;
Bypass one way valve (5), this bypass one way valve (5) is connected between equipment body (3) and the outlet pipe (17) by pipeline, this bypass one way valve (5) is used for motor and water pump (4) when not moving, and is directly supplied water to outlet pipe (16) low pressure without water pump by water inlet pipe (16);
First breather valve (7-1), this first breather valve (7-1) is connected between water intaking valve (1) and the equipment body (3), is used for the air inlet or the exhaust of inlet channel;
Second breather valve (7-2), this second breather valve (7-2) are connected between the upper end and outlet valve (6) lower end of equipment body (3), are used for the exhaust to equipment body;
Limit low-pressure meter (8), this limit low-pressure meter (8) is connected between water intaking valve (1) and the equipment body (3), and the information that is used to detect the pressure of water inlet and produces water inlet water supply low pressure is transferred to control device (18) by signal cable (10) with this information;
Excessive low water level protection device (11), this excessive low water level protection device (11) is connected between water intaking valve (1) and the equipment body (3), be used in the water inlet pipe the whether detection of lack of water, send the information that obtains to control device (18) by signal cable (10) motor and water pump (4) is controlled, water system is protected;
Discharge pressure sensor (9), this discharge pressure sensor (9) is connected between outlet valve (6) and the equipment body (3), the data message that is used to detect the pressure at the mouth of a river and produces mouth of a river water pressure, and this information is transferred to control device (18) by signal cable (10), motor and water pump is controlled;
At least one control device (18); this control device (18) air switch energising of only need manually closing; by its automatic detectability low-pressure meter (8), discharge pressure sensor (9) and excessive low water level protection device (11) to pressure of supply water information, to the ftercompction water supply installation start, acceleration, deceleration, dormancy, wake up, control that speed is stopped.
5. ftercompction water supply installation according to claim 4; it is characterized in that: described control device (18); comprise frequency converter, cyclelog, lack of water controller, pressure-regulating device and power supply; this control device (18) is used for according to limit low-pressure meter (8), discharge pressure sensor (9) and excessive low water level protection device (11); detected pressure of supply water information is controlled secondary water supply.
6. according to claim 4 or 5 described ftercompction water supply installations, it is characterized in that: trap (13) and Counterflow-proof device (14) are installed, between water inlet pipe (15) and municipal public use pipeline (17) for use in improving the quality that supplies water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201291531U CN201158836Y (en) | 2007-08-17 | 2007-08-17 | Pressure-compensating water supply device without additional influence to common ductwork hydraulic pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201291531U CN201158836Y (en) | 2007-08-17 | 2007-08-17 | Pressure-compensating water supply device without additional influence to common ductwork hydraulic pressure |
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| Publication Number | Publication Date |
|---|---|
| CN201158836Y true CN201158836Y (en) | 2008-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201291531U Expired - Fee Related CN201158836Y (en) | 2007-08-17 | 2007-08-17 | Pressure-compensating water supply device without additional influence to common ductwork hydraulic pressure |
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| Country | Link |
|---|---|
| CN (1) | CN201158836Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864816A (en) * | 2012-09-28 | 2013-01-09 | 朱学斌 | Alternate-replacement gas-lift water supply unit |
-
2007
- 2007-08-17 CN CNU2007201291531U patent/CN201158836Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864816A (en) * | 2012-09-28 | 2013-01-09 | 朱学斌 | Alternate-replacement gas-lift water supply unit |
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