CN213741370U - Water supply system - Google Patents
Water supply system Download PDFInfo
- Publication number
- CN213741370U CN213741370U CN202022614051.7U CN202022614051U CN213741370U CN 213741370 U CN213741370 U CN 213741370U CN 202022614051 U CN202022614051 U CN 202022614051U CN 213741370 U CN213741370 U CN 213741370U
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- China
- Prior art keywords
- water
- pipeline
- bidirectional
- way
- water pump
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 32
- 238000000819 phase cycle Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses a water supply system, which comprises a one-way water supply pipeline, a two-way pipeline and a water return pipeline which are arranged between a forebay and a water using end in parallel; the one-way water supply pipeline is provided with a one-way water pump; the bidirectional pipeline is provided with a bidirectional water pump and a first adjusting valve; when the water flow in the bidirectional pipeline flows to the forebay from the water using end, the motor of the bidirectional water pump works in a generator mode; and a second adjusting valve is arranged on the water return pipeline. The utility model discloses a two-way pipeline both can regard as the supply channel, also can regard as the return water bypass to widen the adjustment range of water yield, retrieved partial electric energy simultaneously, have moreover that the fluctuation range of water yield is little, save bypass water pump, reliability height to the lift influence advantage.
Description
Technical Field
The utility model relates to a water supply system.
Background
At present, an uninterruptible water supply system adopted by a power plant is generally provided with two or more water pumps, and at least one water pump continuously operates. The drawbacks of the current solutions are: if a fixed frequency pump is used, the amount of water is difficult to vary widely according to demand. If a variable frequency pump is adopted, although the water quantity can be controlled by adjusting the rotating speed, the lift is in direct proportion to the square of the rotating speed (flow), and the requirement of a water supply system with the requirement on the lift is still difficult to meet.
SUMMERY OF THE UTILITY MODEL
The utility model provides a water supply system, its purpose: under the condition of not influencing the lift, the large-amplitude adjustment of the water quantity is realized.
The utility model discloses technical scheme as follows:
a water supply system comprises a one-way water supply pipeline, a two-way pipeline and a water return pipeline which are arranged between a forebay and a water using end in parallel;
the one-way water supply pipeline is provided with a one-way water pump;
the bidirectional pipeline is provided with a bidirectional water pump and a first adjusting valve; when the water flow in the bidirectional pipeline flows to the forebay from the water using end, the motor of the bidirectional water pump works in a generator mode;
and a second adjusting valve is arranged on the water return pipeline.
As a further improvement of the system: and the second adjusting valve on the water return pipeline is a fifth electric valve.
As a further improvement of the system: and a manual valve connected with the second adjusting valve in series is further installed on the water return pipeline.
As a further improvement of the system: the first adjusting valve comprises a fourth electric valve and a third electric valve which are respectively arranged on the front side and the rear side of the bidirectional water pump.
As a further improvement of the system: and the one-way water supply pipeline is also provided with a second electric valve and a first electric valve which are respectively positioned at the front side and the rear side of the one-way water pump.
As a further improvement of the system: a motor of the one-way water pump is connected with a first frequency converter; the motor of the bidirectional water pump is connected with the second frequency converter;
the energy feedback unit and a total power supply end connected with a power supply grid are further included; the alternating current power supply end of the first frequency converter and the alternating current power supply end of the second frequency converter are both connected with the total power supply end; the direct-current bus connecting end of the second frequency converter is connected with the direct-current input end of the energy feedback unit through a common direct-current bus; the alternating current output end of the energy feedback unit is connected with the main power supply end through a reactance device, and the phase sequence access end of the energy feedback unit is also connected with the main power supply end.
Compared with the prior art, the utility model discloses following beneficial effect has: (1) the bidirectional pipeline can be used as a water supply pipeline and a backwater bypass, so that the adjustment range of the water quantity is widened, and the bidirectional pipeline has the advantages of small water quantity fluctuation amplitude, small influence on the lift, bypass water pump saving and the like; (2) when the bidirectional pipeline is used as a return water bypass, the electric energy can be recovered by utilizing return water power and supplied to other motors or electric equipment; (3) the one-way water pump and the two-way water pump can be mutually standby, and when one of the two-way water pump and the two-way water pump fails, the other one of the two-way water pump and the one-way water pump is responsible for supplying water, so that the water supply is not interrupted.
Drawings
FIG. 1 is a schematic view of the pipeline connection of the present invention;
fig. 2 is a schematic diagram of the circuit connection of the present invention.
Detailed Description
The technical scheme of the utility model is explained in detail below with the attached drawings:
referring to fig. 1, a water supply system includes a unidirectional water supply line, a bidirectional line and a water return line connected in parallel between a forebay 9 and a water using end, and the three lines have at least one line respectively. In order to improve the reliability of the system, more than two paths are available.
The one-way water supply pipeline is provided with a one-way water pump 2, a first electric valve 1 positioned between the one-way water pump 2 and the water using end and a second electric valve 3 positioned between the one-way water pump 2 and the forebay 9. The on-off and flow rate of the one-way water supply pipeline can be adjusted through the first electric valve 1 and the second electric valve 3.
The bidirectional pipeline is provided with a bidirectional water pump 6, a third electric valve 4 positioned between the bidirectional water pump 6 and the water using end and a fourth electric valve 8 positioned between the bidirectional water pump 6 and the forebay 9. The on-off and flow of the bidirectional pipeline can be adjusted through the third electric valve 4 and the fourth electric valve 8.
And a fifth electric valve 5 and a manual valve 7 which are connected in series are arranged on the water return pipeline, so that the on-off and the flow of the bypass return water can be adjusted.
The position of the valve can be freely set as required.
Further, as shown in fig. 2, a motor of the unidirectional water pump 2 is connected with a first frequency converter 10; and a motor of the bidirectional water pump 6 is connected with a second frequency converter 11.
The system also comprises an energy feedback unit 12 and a main power supply end connected with a power supply grid. The alternating current power supply end of the first frequency converter 10 and the alternating current power supply end of the second frequency converter 11 are both connected with the total power supply end; the direct current bus connecting end of the second frequency converter 11 is connected with the direct current input end of the energy feedback unit 12 through a common direct current bus 14; the ac output end of the energy feedback unit 12 is connected to the main power supply end through the reactance device 13, and the phase sequence input end of the energy feedback unit 12 is also connected to the main power supply end.
When water flow in the bidirectional pipeline flows from the water end to the front pool 9, the motor of the bidirectional water pump 6 works in a generator mode, direct-current voltage generated on a direct-current bus of the second frequency converter 11 is connected to the energy feedback unit 12, the energy feedback unit 12 inverts the direct current into alternating-current voltage which is the same in frequency and phase as the voltage of the power grid according to the phase sequence and frequency of the power grid, and then the alternating-current voltage is fed back to the main power supply end to drive equipment such as the first frequency converter 10 to work.
In normal operation, as shown in fig. 1, a single pump or a combination of multiple pumps may be used. If the water demand drops by a wide margin and can suitably keep for a certain time, then one-way water pump 2 normal operating, two-way water pump 6 (part or whole) reverse run, and the two-way pipeline is used as the return water bypass, comes control system water pressure and water yield through the opening and closing degree of adjustment third electric valve 4 or fourth electric valve 8. At this time, the second motor becomes a generator to generate electricity, and part of the electric energy is recovered. Therefore, when the external flow is low, the lift can be ensured to meet the user requirement, and meanwhile, the bypass water pump is saved.
If the one-way water pump 2 fails and no other one-way water pump 2 is used for replacement, the two-way water pump 6 can be set to operate in the forward direction, the water quantity is adjusted by using the bypass, and the failure of the one-way water pump 2 is eliminated as soon as possible.
Similarly, if the bidirectional water pump 6 fails, cannot run reversely and no other bidirectional water pump 6 can replace the bidirectional water pump, the water quantity can be adjusted by using the water return pipeline, and the failure of the bidirectional water pump 6 can be eliminated as soon as possible.
Claims (6)
1. A water supply system characterized by: comprises a one-way water supply pipeline, a two-way pipeline and a water return pipeline which are arranged between a forebay (9) and a water using end in parallel;
a one-way water pump (2) is arranged on the one-way water supply pipeline;
a bidirectional water pump (6) and a first adjusting valve are arranged on the bidirectional pipeline; when the water flow in the bidirectional pipeline flows to the front pool (9) from the water end, the motor of the bidirectional water pump (6) works in a generator mode;
and a second adjusting valve is arranged on the water return pipeline.
2. The water supply system of claim 1, wherein: and the second adjusting valve on the water return pipeline is a fifth electric valve (5).
3. The water supply system of claim 1, wherein: and a manual valve (7) connected with the second adjusting valve in series is further installed on the water return pipeline.
4. The water supply system of claim 1, wherein: the first adjusting valve comprises a fourth electric valve (8) and a third electric valve (4) which are respectively arranged on the front side and the rear side of the bidirectional water pump (6).
5. The water supply system of claim 1, wherein: and the one-way water supply pipeline is also provided with a second electric valve (3) and a first electric valve (1) which are respectively positioned at the front side and the rear side of the one-way water pump (2).
6. The water supply system according to any one of claims 1 to 5, wherein: a motor of the one-way water pump (2) is connected with a first frequency converter (10); the motor of the bidirectional water pump (6) is connected with a second frequency converter (11);
the energy feedback device also comprises an energy feedback unit (12) and a total power supply end connected with a power supply grid; the alternating current power supply end of the first frequency converter (10) and the alternating current power supply end of the second frequency converter (11) are both connected with the total power supply end; the direct-current bus connecting end of the second frequency converter (11) is connected with the direct-current input end of the energy feedback unit (12) through a common direct-current bus (14); the alternating current output end of the energy feedback unit (12) is connected with the main power supply end through a reactance device (13), and the phase sequence access end of the energy feedback unit (12) is also connected with the main power supply end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022614051.7U CN213741370U (en) | 2020-11-12 | 2020-11-12 | Water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022614051.7U CN213741370U (en) | 2020-11-12 | 2020-11-12 | Water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213741370U true CN213741370U (en) | 2021-07-20 |
Family
ID=76823562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022614051.7U Withdrawn - After Issue CN213741370U (en) | 2020-11-12 | 2020-11-12 | Water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213741370U (en) |
-
2020
- 2020-11-12 CN CN202022614051.7U patent/CN213741370U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210720 Effective date of abandoning: 20231210 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20210720 Effective date of abandoning: 20231210 |