CN209368949U - Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant - Google Patents
Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant Download PDFInfo
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- CN209368949U CN209368949U CN201822241684.0U CN201822241684U CN209368949U CN 209368949 U CN209368949 U CN 209368949U CN 201822241684 U CN201822241684 U CN 201822241684U CN 209368949 U CN209368949 U CN 209368949U
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- tank
- air inlet
- moisturizing
- pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 238000005086 pumping Methods 0.000 title claims abstract description 22
- 238000012546 transfer Methods 0.000 title claims abstract description 13
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
The utility model discloses a kind of protecting water hammer devices suitable for large-scale buried long distance water transfer pumping plant, pressure water tank including exit of pump branch pipe river outlet is arranged in, water supply tank is provided with above the pressure water tank, it is provided with the air inlet-outlet pipe with air inlet and exhaust valve at the top of the water supply tank, moisturizing lower box part is provided with the moisturizing impedance tube being connected with pressure water tank.The air inlet-outlet pipe and moisturizing impedance tube are staggered.The utility model has a clear superiority in principle relative to other protecting water hammer schemes, can effectively improve safety and the convenience of remote conveying water system, reduces construction, the operation and maintenance cost of protecting water hammer measure, cost saving.
Description
Technical field
The utility model relates to hydraulic engineering technical fields, are suitable for large-scale buried long distance water transfer more particularly, to one kind and pump
The protecting water hammer device at station.
Background technique
With the development of China's economic society, the contradiction of supply and demand for the water resource becomes increasingly conspicuous.In order to ensure the water demand of various regions,
Adjust water supply project more and more by large-scale buried drawing for booster station progress long distance water transfer.For this kind of pumping plant, usually want
Ask the outlet conduit Installation Elevation of water pump about 3m or more lower than water inlet pool water level.But due to Design of Pump Station suffer from landform,
The limitation of the objective condition such as matter, the actual installation elevation of exit of pump pipeline are usually not much different with water inlet pool water level or than water inlets
Pool water level is also high, causes to cause more serious positive water hammer and negative water hammer effect under following operating condition: 1. normally-open when pump group
Water flow acute variation can all be caused with the normally-open of closing and flow control valve etc. and closing, cause the pressure of water in pipeline
It is raised and lowered suddenly；2. under pump group accident power blackout situation, check-valves tripping, non-return valve events (Closing Law) are improper, all can
In pumping line, outlet pipe high point or become generation intense pressure decline at slope, especially when pressure is lower than the pressure for vaporization of water
When, it is likely that there is water column separation, cutout cavity occurs, strong shock will be generated when the water flow at cavity is made up, it is huge
Water column make up shock can generate immense pressure rising, cause pipeline configuration to destroy when serious, at the same water pump flow backwards water body make
With lower rapid reversion, high vibration is generated, if cannot control in time can generate unstable failure.
Common positive water hammer safeguard procedures are that exit of pump hydrauliccontrol non-return valve or relief valve are installed on pipeline.Common is negative
Protecting water hammer measure is bidirectional pressure regulating tower, one-side-flow surge tank or the air pressure container that setting is connected with aqueduct, Yi Ji
Air valve is set on pipeline, additional inertance flywheel etc. is set in water pump assembly.Wherein, bidirectional pressure regulating tower is suitable for large-scale supply water
Engineering, construction are limited by the limitation of landform, project amount and weather conditions often；Compared with bidirectional pressure regulating tower, one-side-flow surge tank
Height is smaller, but the length of pipe section protected is shorter；Air pressure container is suitable for pump group flow is small, lift is higher, control pressure
The wider situation of variation range, but need to be equipped with air compressor machine air compensating system, water level signal meter, safety valve etc., compare in operational management
It is more complex；Air valve is then since the limitation of intake and exhaust amount cannot be fully solved the negative pressure problem of heavy-caliber pipeline engineering；It is additional used
Property flywheel can increase the inertia of water pump assembly rotatable parts, the protection to prevent the sharply decline of pump capacity, to small pumping station
Effect is preferable, but unobvious to the effect of large pumping station.
Summary of the invention
The utility model provides a kind of protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant, it is therefore intended that
Solve the problems, such as that existing pumping plant aqueduct is easy by water flow impulsion.
To achieve the above object, the utility model can take following technical proposals:
The protecting water hammer device described in the utility model for being suitable for large-scale buried long distance water transfer pumping plant, including setting exist
The pressure water tank of exit of pump branch pipe river outlet, the pressure water tank top are provided with water supply tank, setting at the top of the water supply tank
There is the air inlet-outlet pipe with air inlet and exhaust valve, moisturizing lower box part is provided with the moisturizing impedance tube being connected with pressure water tank.
The air inlet-outlet pipe and moisturizing impedance tube are staggered.
It is extended to outside water supply tank straight up at the self-complementary water tank central axis of air inlet-outlet pipe, and on air inlet-outlet pipe top
The air inlet and exhaust valve is set.
The self-complementary water tank bottom of moisturizing impedance tube extends in pressure water tank straight down, and moisturizing impedance pipe end position
More than pressure water tank central axis.
The protecting water hammer device provided by the utility model for being suitable for large-scale buried long distance water transfer pumping plant, in water pump in pump station
Pressure water tank is arranged in outlet stool river outlet, and organically combines with water supply tank, and it is more securely and reliably stable to form a kind of operation
Novel water hammer protective device；Since water supply tank is a fixed hydro-structure, not any action component, so reliability
Highest, reasonable volume design can guarantee that there will not be air in least favorable enters pressure water tank.The utility model phase
It has a clear superiority in principle for other protecting water hammer schemes, can effectively improve the safety and just of remote conveying water system
Benefit reduces construction, the operation and maintenance cost of protecting water hammer measure, cost saving.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the left view of Fig. 1.
Specific embodiment
As shown in Figure 1, 2, the protecting water hammer dress described in the utility model for being suitable for large-scale buried long distance water transfer pumping plant
It sets, including being mounted on the pressure water tank 1 of each exit of pump branch pipe confluence outside pump house, and is mounted on 1 top of pressure water tank
Water supply tank 2.Multiple air inlet-outlet pipes 4 are installed at the top of water supply tank 2, at self-complementary 2 central axis of water tank of each air inlet-outlet pipe 4 vertically to
On extend to outside water supply tank 2, and 4 top of air inlet-outlet pipe install air inlet and exhaust valve 3；2 lower part of water supply tank is equipped with multiple and pressure
The nominal diameter that water tank 1 is connected be DN720 moisturizing impedance tube 5, self-complementary 2 bottom of water tank of each moisturizing impedance tube 5 vertically to
Under extend to 1 central axis of pressure water tank or more, so that the impedance factor for making water flow pass in and out moisturizing impedance tube 5 from different directions is different
Sample.Above-mentioned air inlet-outlet pipe 4 and moisturizing impedance tube 5 are staggered on the sectional elevation of water supply tank 2, to prevent moisturizing impedance tube 5
Water inlet water flow directly impact the nozzle of air inlet-outlet pipe 4, and be conducive to 2 top of water supply tank air discharge.In the present embodiment, into
Exhaust pipe 4 is 3, and moisturizing impedance tube 5 is 4；4 nominal diameter of air inlet-outlet pipe be DN300, at the top of air inlet and exhaust valve 3 select
The CARX-0300 type valve that Shanghai Karon Valves Machinery Co., Ltd's nominal diameter is DN300, nominal pressure is PN1.0 MPa；
5 nominal diameter of moisturizing impedance tube is DN720, and self-complementary 2 bottom of water tank extends to 1.0m or so in pressure water tank 1 straight down；
Above-mentioned water supply tank 2 to impedance factor when 1 moisturizing of pressure water tank be about 1.5, impedance factor when pressure water tank 1 is to 2 water-filling of water supply tank
About 2.0.For the ease of the connection with outlet conduit buried after pump, while optimizing disengaging hydraulic regime, pressure water tank 1 and moisturizing
Case 2 is all made of Horizontal cylindrical case.Enter pressure water tank 1, moisturizing impedance to guarantee to there will not be air in least favorable
The design of the sum of section of pipe 5 is smaller, is 4 × 0.407=1.63m2, for the design discharge of a large pumping station, 4 benefits
Relatively the sum of light section of water impedance tube 5 can form a constant impedance, limit water supply tank 2 and enter 1 rate of water make-up of pressure water tank, make moisturizing
The volume of case 2 is able to satisfy vacuum control condition.The volume of water supply tank 2 can be emulated in conjunction with the hydraulic hammer calculation machine of water delivery pipeline system
The rate of water make-up that program determines determines.The diameter and length of cylinder can be determined according to the actual arrangement condition after pump house.Water supply tank 2
The determination of reasonable volume should ensure that the water in water supply tank 2 still has a small amount of water (design conditions under the most unfavorable processing condition
Under have more than 50% extra water), guarantee air will not enter pressure water tank 1.
When pumping plant operates normally, pump station pressure water tank 1 passes through the water-filling into water supply tank 2 of moisturizing impedance tube 5, takes in water body
After the gas of band separates in water supply tank 2, discharged by top air inlet and exhaust valve 3；When the unexpected termination of pumping of accident occurs for pumping plant, pressure
The pressure of power water tank 1 drastically reduces (lower than+6m), and 2 top air pressure of water supply tank is subatmospheric, 3 air inlet of air inlet and exhaust valve, water supply tank
2 to 1 moisturizing of pressure water tank, to eliminate the water hammer negative pressure in the pumping plant pump housing and aqueduct；When the water flow velocity in aqueduct
When being gradually decreased to zero, due to the moisturizing effects of water supply tank 2, the hydraulic pressure bottom out of pressure water tank 1, at this point, water supply tank 2 should be made
The water of interior holding at least 10% or so, to guarantee that air will not enter pressure water tank 1 by water supply tank 2；It is defeated after accident excludes
Hydraulic pressure in water pipeline is begun to ramp up, and the water filling process of pressure water tank 1 and water supply tank 2 starts, due to the setting of 2 bottom of water supply tank
Moisturizing impedance tube 5 has higher impedance, can effectively consume the kinetic energy of moisturizing water flow in pipeline, to reach reduction counter-current process
Caused by positive water hammering.
Utility model has the advantages that
1, the Combination Design for making full use of water pump in pump station outlet stool confluence pressure water tank and water supply tank provides a kind of knot
The simple protecting water hammer device of structure is not only able to destroy negative pressure influence, moreover it is possible to reduce water hammering, effectively prevent because by landform
The pumping plant that condition limitation is not able to satisfy the buried requirement in pump outlet tube road generates water hammer negative pressure in exit；
2, water supply tank is the hydro-structure of fixed design, and without any action process, reliability is higher, is calculated reasonable
Volume can guarantee that there will not be air in least favorable enters pressure water tank；Compared with common protecting water hammer device
Compared with, it has a clear superiority in principle, furthermore, it is computed proof, hydraulics effect is also best；
3, it is designed by reasonably optimizing, the utility model can eliminate large-scale water supply project and generate since water body inertia changes
Water hammer pressure is destroyed caused by pipeline, improves the safety in operation and shooting convenience of large-scale water supply project, is saved engineering and is made
Valence simultaneously reduces operation and maintenance cost.
Claims (4)
1. a kind of protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant, it is characterised in that: including being arranged in water
The pressure water tank (1) of pump discharge branch pipe river outlet, pressure water tank (1) top are provided with water supply tank (2), the water supply tank
(2) top is provided with the air inlet-outlet pipe (4) with air inlet and exhaust valve (3), and water supply tank (2) lower part is provided with and pressure water tank (1) phase
The moisturizing impedance tube (5) of connection.
2. the protecting water hammer device according to claim 1 for being suitable for large-scale buried long distance water transfer pumping plant, feature exist
In: the air inlet-outlet pipe (4) and moisturizing impedance tube (5) are staggered.
3. the protecting water hammer device according to claim 1 for being suitable for large-scale buried long distance water transfer pumping plant, feature exist
In: water supply tank (2) is extended to straight up outside at the air inlet-outlet pipe (4) self-complementary water tank (2) central axis, and in air inlet-outlet pipe
(4) air inlet and exhaust valve (3) is arranged in top.
4. the protecting water hammer device according to claim 1 for being suitable for large-scale buried long distance water transfer pumping plant, feature exist
In: the moisturizing impedance tube (5) self-complementary water tank (2) bottom is extended to straight down in pressure water tank (1), and moisturizing impedance tube
(5) end is located at pressure water tank (1) central axis or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822241684.0U CN209368949U (en) | 2018-12-29 | 2018-12-29 | Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822241684.0U CN209368949U (en) | 2018-12-29 | 2018-12-29 | Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant |
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| Publication Number | Publication Date |
|---|---|
| CN209368949U true CN209368949U (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822241684.0U Active CN209368949U (en) | 2018-12-29 | 2018-12-29 | Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant |
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| CN (1) | CN209368949U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440870A (en) * | 2018-12-29 | 2019-03-08 | 黄河勘测规划设计有限公司 | Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant |
-
2018
- 2018-12-29 CN CN201822241684.0U patent/CN209368949U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440870A (en) * | 2018-12-29 | 2019-03-08 | 黄河勘测规划设计有限公司 | Protecting water hammer device suitable for large-scale buried long distance water transfer pumping plant |
| CN109440870B (en) * | 2018-12-29 | 2024-11-15 | 黄河勘测规划设计研究院有限公司 | Water hammer protection device suitable for large deep buried long distance water pump station |
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