CN115748894A - Two-way water supply and drainage system suitable for large-scale water supply pump station - Google Patents
Two-way water supply and drainage system suitable for large-scale water supply pump station Download PDFInfo
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- CN115748894A CN115748894A CN202211543459.7A CN202211543459A CN115748894A CN 115748894 A CN115748894 A CN 115748894A CN 202211543459 A CN202211543459 A CN 202211543459A CN 115748894 A CN115748894 A CN 115748894A
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Abstract
The invention provides a bidirectional water supply and drainage system suitable for a large-scale water supply pump station, which comprises a differential pressure transmitter, wherein the differential pressure transmitter is arranged on a bypass pipe of a cooler; the cooler is provided with a cooler water supply pipe, a cooler water supply by-pass pipe, a cooler drain pipe and a cooler drain by-pass pipe; the cooler water supply pipe is communicated to the water inlet side of the cooler, and the cooler water supply by-pass pipe is communicated to the water discharge side of the cooler; the cooler drain pipe is communicated to the drain side of the cooler, and the cooler drain by-pass pipe is communicated to the water inlet side of the cooler; all be equipped with motorised valve and maintenance valve on cooler delivery pipe, cooler water supply bypass pipe, cooler drain pipe and the cooler drainage bypass pipe, cooperate between a plurality of motorised valves in order to realize cooler forward water intaking or direction water intaking. The invention can effectively solve the problems of silt deposition and aquatic organism adhesion of the cooler pipeline and ensure the reliability of the technical water supply system of the pump station.
Description
Technical Field
The invention relates to a bidirectional water supply and drainage system suitable for a large-scale water supply pump station, which is suitable for a technical water supply system of a vertical single-stage single-suction centrifugal pump unit or other similar water supply pump stations of a water taking pump station in a large-scale water diversion project.
Background
A general source water pump station takes water from a river, such as: yangtze river, yellow river etc. the aquatic sand content is big, and traditional technical water supply system produces cooler pipeline silt siltation easily, and aquatic thing adheres to the scheduling problem, overhauls frequently, influences the unit operation.
In view of this, it is necessary to provide a bidirectional water supply and drainage system suitable for a large-scale water supply pump station, which is convenient and reliable and can effectively improve the safety and stability of the unit operation.
Disclosure of Invention
The invention aims to provide a bidirectional water supply and drainage system suitable for a large-scale water supply pump station, aiming at the problems in the background technology.
Therefore, the above purpose of the invention is realized by the following technical scheme:
the utility model provides a two-way water supply and drainage system suitable for large-scale water supply pump station which characterized in that: the bidirectional water supply and drainage system suitable for the large-scale water supply pump station comprises a differential pressure transmitter, wherein the differential pressure transmitter is arranged on a bypass pipe of a cooler;
the cooler is provided with a cooler water supply pipe, a cooler water supply by-pass pipe, a cooler drain pipe and a cooler drain by-pass pipe;
the cooler water supply pipe is communicated to the water inlet side of the cooler, and the cooler water supply by-pass pipe is communicated to the water discharge side of the cooler; the cooler drain pipe is communicated to the drain side of the cooler, and the cooler drain by-pass pipe is communicated to the water inlet side of the cooler;
all be equipped with motorised valve and service valve on cooler delivery pipe, cooler water supply bypass pipe, cooler drain pipe and the cooler drainage bypass pipe, cooperate between a plurality of motorised valves in order to realize that the cooler is positive to be intake or the direction is intake.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: and a flow regulating valve is arranged on a water inlet pipeline of the cooler.
As a preferred technical scheme of the invention: and pressure gauges are respectively arranged on the inlet side pipeline and the outlet side pipeline of the cooler.
As a preferred technical scheme of the invention: and a temperature transmitter is arranged on the water discharging pipe of the cooler.
As a preferred technical scheme of the invention: the water supply pipe of the cooler is communicated with the water supply branch pipe, and the water supply branch pipe is communicated with the water supply main pipe.
As a preferred technical scheme of the invention: the water supply main pipe is communicated with a plurality of water supply pump branches, a water supply pump is arranged on each water supply pump branch, the water supply pump branches are communicated to the water taking main pipe, the water taking main pipe is communicated with a plurality of water taking branch pipes, and a water taking pump is arranged on each water taking branch pipe.
As a preferred technical scheme of the invention: the water intake main pipe is communicated with a water discharge pipe.
Each cooler is provided with a differential pressure transmitter which can reflect the pressure difference at the two ends of the cooler and output a control signal;
the water supply and drainage pipeline and the bypass pipe of each cooler technology are provided with an electric valve, and the on-off of the electric valve is controlled by a differential pressure signal;
and the technical water supply and drainage pipelines of each cooler and the electric valves of the bypass pipes of the technical water supply and drainage pipelines are provided with maintenance valves in front of the electric valves, so that the on-line maintenance of the technical water supply and drainage pipelines can be realized.
Each cooler technical water supply branch pipe is provided with a flow regulating valve, and flow regulation can be realized by regulating the valve opening of the flow regulating valve.
The technical water supply system adopts an expansion unit water supply mode, 2 units are one unit, and each unit is provided with 3 technical water supply pumps 2 and 1. The whole plant is provided with two water supply units.
The technical water supply main pipe is provided with an isolation valve between the No. 2 and No. 3 units. 2 independent water using units are formed by the 1# to 2# units and the 3# to 4# units through the isolation valves, and each unit can independently operate and be overhauled.
To the different operating condition of unit, can realize the reliable operation of unit, specific mode is:
normal operation of the unit (normal pressure difference signal of the cooler): the technical water supply and taking branch pipes take water from a front pool of the pump station, supply water to the water supply and drainage pipes of the coolers of each user of the No. 1 and No. 2 water pump units after being gathered by 3 technical water supply pumps, and then discharge the water to the water taking pipes of the units through a technical water supply and drainage main pipe.
Abnormal operation of the unit (overlarge differential pressure signal of the cooler): the differential pressure signal is transmitted to the control system, and the electric valve acts to realize the switching of the water supply pipeline.
Forward or reverse flow motorised valves fail: the electric valve can be replaced on line by the partition of the maintenance valve.
When the temperature of the temperature transmitter of the water drain pipe of the cooler of the unit is too high or too low: the flow of each user is uniformly distributed by controlling the flow regulating valve to increase or decrease the flow.
When a unit technology water supply system fails: by cutting off the water supply main pipe isolation valve, the technical water supply of another unit is not influenced, and the operation is flexible.
The invention can supply water bidirectionally for users by reasonably arranging each user technical water supply and drainage pipeline and the by-pass pipe, the valve and the automation element thereof, effectively solves the problems of silt deposition and aquatic organism adhesion of the cooler pipeline, ensures the reliability of the technical water supply system of the pump station, and particularly has the following beneficial effects:
1) Under different working conditions, the system can ensure the effective supply of technical water supply of the unit.
2) Through setting up cooler technique water supply bypass pipe, differential pressure transmitter and motorised valve, can realize the automatic control of the two-way water supply and drainage of cooler, prevent effectively that silt siltation and aquatic thing from adhering to the problem.
3) When the electric valve of the technical water supply and drainage pipeline or the bypass pipe is damaged, the electric valve can be replaced on line by separating through the maintenance valve.
4) When the temperature of the temperature transmitter of the water discharge pipe of the unit cooler is too high or too low: the flow of each user is uniformly distributed by controlling the flow regulating valve to increase or decrease the flow, and the cooling effect of the cooler is guaranteed.
5) When a unit technology water supply system fails: by cutting off the isolation valve of the water supply main pipe, the technical water supply of another unit is not influenced, and the operation is flexible.
6) The system provided by the invention is reliable in design and convenient to maintain, can effectively prevent silt deposition and aquatic organism adhesion of pipelines, guarantees the cooling effect of a unit, guarantees the safe and stable operation of the unit, and has a good application prospect.
Drawings
Fig. 1 is a diagram of a bidirectional water supply and drainage system suitable for a large water supply pump station provided by the invention.
Fig. 2 is a scene diagram of the bidirectional water supply and drainage system suitable for a large-scale water supply pump station provided by the invention.
Detailed Description
The bidirectional technical water supply and drainage system suitable for the large-scale water supply pump station is provided with a technical water supply and drainage pipeline and a bypass thereof according to different operation conditions of the unit.
The two-way technology water supply and drainage system of the large water supply pump station comprises a main shaft seal water supply and drainage pipe of each water pump unit, a water pump bearing cooler water supply and drainage pipe (flowing in the forward direction) and a bypass pipe (flowing in the reverse direction) of the water pump bearing cooler water supply and drainage pipe, a lower guide bearing cooler water supply and drainage pipe (flowing in the forward direction) and a bypass pipe (flowing in the reverse direction) of the lower guide bearing cooler water supply and drainage pipe, and a motor air cooler water supply and drainage pipe (flowing in the forward direction) and a bypass pipe (flowing in the reverse direction) of the lower guide bearing cooler water supply and drainage pipe. Further comprising: technical water supply and taking branch pipes, technical water supply and taking main pipes, technical water supply pumps, technical water supply main pipes and technical water supply and drainage main pipes. And valves, instruments and meters and the like on all pipelines.
As shown in fig. 1-2, the present example is a technical water supply and drainage system applied to a large water supply pump station. The pump station is provided with four units 1# -4 #, three main units and one standby unit.
In order to explain the principle of the bidirectional technical water supply and drainage system of the water supply pump station, firstly, the principle of the overall technical water supply system of the pump station is simply introduced. The technical water supply system sketch of the pump station is shown in figure 2, which only shows the technical water supply unit of the No. 1 and No. 2 water pump set. The technical water supply system of the pump station adopts an expansion unit water supply mode. Every 2 water pump units are a water supply unit. The whole plant has 2 water supply units. The 2 water supply units share one water intake main pipe 3. The technical water supply is used for supplying water to users of all bearing coolers of the unit. The technical water supply source is taken from the water intake pool, 2 water intake pools are respectively provided with a water intake pipe 1 and a water intake pipe 2, the water intake main pipe 3 and the water supply pump branches 31, 32 and 33 (the water supply pump branches are provided with water supply pumps 311, 312 and 313, and the two main water supply pipes are used for one purpose), the water supply main pipe 4 and the water supply branch pipe 41 supply water to each user, and the water supply main pipe and the water supply branch pipe are discharged to the unit water intake pipe through the technical water supply drain pipe 416.
With the above brief introduction about the technical water supply system of the pump station unit, the following focuses on the bidirectional technical water supply and drainage system of the pump station. The cooling water supply and drainage systems configured for the No. 1-4 water pump units of the power station are basically the same, and the users of each unit are configured with a bidirectional water supply and drainage system which respectively comprises a user water supply branch pipe 412, a cooler water supply pipe 4121, a cooler drainage pipe 4120, a valve, an automatic element, a cooler water supply bypass pipe 4122, a cooler drainage bypass pipe 4123, a valve and an automatic element.
The following takes the water pump bearing users as an example to specifically explain the system composition and the water supply and drainage method. The pump bearing cooling water supply manifold 412 takes water from the unit technology water supply manifold 41. The water supply branch pipe 412 of the water pump bearing cooler is provided with a flow regulating valve 412-1, and the flow regulating valve 412-1 is used for automatically regulating the flow according to the temperature of the water discharge pipe of the cooler. The cooler water supply line 4121 is provided after the flow rate adjustment valve 412-1, and flows to the outlet B through the inlet of the cooler a. A bypass interface is arranged at the inlet A, and a cooler drain bypass 4123 flows to a water outlet pipe D of the water pump bearing from the inlet A. A bypass connection is provided from the cooler outlet B and a cooler water supply bypass 4122 flows from the pump bearing cooling water supply manifold 412 to the cooler outlet B. The inlet and outlet of the cooler are provided with a pressure gauge 4121-1, a pressure gauge 4121-2 and a differential pressure transmitter 4121-3.
The water supply pipe 4121 of the cooler is provided with a maintenance valve 4121-4 and an electric valve 4121-5 which are normally open and can be switched on and off by a signal of a differential pressure transmitter. If a fault occurs, the electric valve 4121-5 can be overhauled on line by closing the overhauling valve 4121-4.
The cooler drain pipe 4124 is provided with a service valve 4124-1 and an electric valve 4124-2, and the service valve 4124-1 is a normally open valve and is provided substantially the same as the cooler water supply pipe 4121.
The cooler water supply bypass pipe 4122 and the cooler water discharge bypass pipe 4123 are respectively provided with an inspection valve 4122-1, an inspection valve 4123-1, an electric valve 4122-2 and an electric valve 4123-2, and the inspection valves are all normally open valves; when the output value of the differential pressure transmitter 4121-3 is higher, it is indicated that the heat exchanger is blocked, the differential pressure transmitter outputs a control signal, the electric valve 4121-5 and the electric valve 4124-2 are closed, and the electric valve 4122-2 and the electric valve 4123-2 are opened, so that the reverse water supply of the cooler is realized, and the sediment deposition is reduced.
Aiming at different operation conditions of a No. 1 water pump unit and each user (taking water for a water pump bearing cooler as an example), the water supply and drainage method and the water supply and drainage path are as follows:
working condition 1: normal operation of the unit (normal differential pressure signal of the cooler):
at the moment, the No. 1 water pump unit normally operates, and the differential pressure signal of the cooler is normal. Technical water is taken from a water inlet pool, collected through the technical water taking branch pipes 1 and 2 and the water taking main pipe 3, pressurized through the technical water supply pump 311, the water supply pump 312 and the water supply pump 313, collected through the water supply main pipe 4, and supplied to each cooler user through the unit technical water supplying branch pipe 41, and discharged to a water taking pipe of a water pump unit through the bearing water supplying branch pipe 412, the cooler water supplying pipe 4121, the cooler water discharging pipe 4124 and the water pump bearing water discharging pipe 4120 and then through the unit technical water discharging branch pipe 416.
Working condition 2: abnormal operation of the unit (overlarge differential pressure signal of the cooler):
at this moment, the No. 1 water pump unit operates abnormally, the differential pressure signal of the cooler is too large, silt sedimentation or water biological blockage occurs in the pipeline in the cooler, and the water supply and drainage pipeline of the cooler needs to be switched. The differential pressure signal is transmitted to the control system, and the control system controls the electric valves 4121-5 and 4124-2 to be closed and opens the electric valves 4122-2 and 4123-2. Technical water is taken from a water inlet pool, collected through technical water taking branch pipes 1 and 2 and a water taking main pipe 3, pressurized through a technical water supply pump 311, a water supply pump 312 and a water supply pump 313, collected through a water supply main pipe 4, and supplied to each cooler user through a unit technical water supply branch pipe 41, and discharged to a water taking pipe of a water pump unit through a bearing water supply branch pipe 412, a cooler water supply bypass pipe 4122, a cooler drainage bypass pipe 4123 and a water pump bearing drainage pipe 4120.
Working condition 3: abnormal operation of the unit (the electric valve 4121-1 or the electric valve 4124-2 of the water supply and drainage pipe of the cooler is damaged):
at the moment, the No. 1 water pump unit abnormally operates, the electric valve 4121-1 or the electric valve 4124-2 of the water supply and drainage pipeline of the cooler is damaged, and the electric valve needs to be overhauled on line. At the moment, the maintenance valve 4121-4 and the maintenance valve 4124-1 are closed, the electric valve 4122-2 and the electric valve 4123-2 are opened, and the on-line maintenance of the electric valve of the water supply and drainage pipeline of the cooler is realized without influencing the normal operation of the water pump unit.
Working condition 4: the water temperature of the water discharge pipeline of the cooler is lower or higher
When the temperature signal output by the temperature transmitter 4120-1 on the cooler drain pipe 4120 is higher or lower, the flow regulating valve 412-1 is controlled to act, and the flow of the pipeline is regulated to ensure the safe and economic operation of the water pump unit.
Working condition 5: when the technical water supply system of the 1# and 2# water pump units fails
When the technical water supply system of the No. 1 and No. 2 water pump unit fails, the normal operation of the No. 3 and No. 4 water pump unit is ensured by disconnecting the isolation valve 3-1 on the water taking main pipe. Meanwhile, accumulated water in the water intake header pipe (1 # -2 # section) is discharged through the water discharge pipe 34.
The above-described embodiments are intended to illustrate the present invention, but not to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention and the scope of the claims fall within the scope of the present invention.
Claims (7)
1. The utility model provides a two-way water supply and drainage system suitable for large-scale water supply pump station which characterized in that: the bidirectional water supply and drainage system suitable for the large-scale water supply pump station comprises a differential pressure transmitter, wherein the differential pressure transmitter is arranged on a bypass pipe of a cooler;
the cooler is provided with a cooler water supply pipe, a cooler water supply by-pass pipe, a cooler drain pipe and a cooler drain by-pass pipe;
the cooler water supply pipe is communicated to the water inlet side of the cooler, and the cooler water supply bypass pipe is communicated to the water discharge side of the cooler; the cooler drain pipe is communicated to the drain side of the cooler, and the cooler drain by-pass pipe is communicated to the water inlet side of the cooler;
all be equipped with motorised valve and maintenance valve on cooler delivery pipe, cooler water supply bypass pipe, cooler drain pipe and the cooler drainage bypass pipe, cooperate between a plurality of motorised valves in order to realize cooler forward water intaking or direction water intaking.
2. The bidirectional water supply and drainage system suitable for the large-scale water supply pump station according to claim 1, characterized in that: and a flow regulating valve is arranged on a water inlet pipeline of the cooler.
3. The bidirectional water supply and drainage system suitable for the large-scale water supply pump station according to claim 1, characterized in that: and pressure gauges are respectively arranged on the inlet side pipeline and the outlet side pipeline of the cooler.
4. The bidirectional water supply and drainage system suitable for the large-scale water supply pump station according to claim 1, characterized in that: and a temperature transmitter is arranged on the cooler drain pipe.
5. The bidirectional water supply and drainage system suitable for the large-scale water supply pump station according to claim 1, characterized in that: the water supply pipe of the cooler is communicated with the water supply branch pipe, and the water supply branch pipe is communicated with the water supply main pipe.
6. The bidirectional water supply and drainage system suitable for the large-scale water supply pumping station according to claim 5, is characterized in that: the water supply main is communicated with a plurality of water supply pump branches, a water supply pump is arranged on each water supply pump branch, the water supply pump branches are communicated to the water taking main, the water taking main is communicated with a plurality of water taking branch pipes, and a water taking pump is arranged on each water taking branch pipe.
7. The bidirectional water supply and drainage system suitable for the large-scale water supply pumping station according to claim 6, is characterized in that: the water intake main pipe is communicated with a water discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211543459.7A CN115748894A (en) | 2022-12-02 | 2022-12-02 | Two-way water supply and drainage system suitable for large-scale water supply pump station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211543459.7A CN115748894A (en) | 2022-12-02 | 2022-12-02 | Two-way water supply and drainage system suitable for large-scale water supply pump station |
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| Publication Number | Publication Date |
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| CN115748894A true CN115748894A (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211543459.7A Pending CN115748894A (en) | 2022-12-02 | 2022-12-02 | Two-way water supply and drainage system suitable for large-scale water supply pump station |
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| CN (1) | CN115748894A (en) |
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- 2022-12-02 CN CN202211543459.7A patent/CN115748894A/en active Pending
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