CN108894281A - A kind of integrated pumping plant of lower Inlet and outlet water anti-freeze type wisdom - Google Patents
A kind of integrated pumping plant of lower Inlet and outlet water anti-freeze type wisdom Download PDFInfo
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- CN108894281A CN108894281A CN201811004360.3A CN201811004360A CN108894281A CN 108894281 A CN108894281 A CN 108894281A CN 201811004360 A CN201811004360 A CN 201811004360A CN 108894281 A CN108894281 A CN 108894281A
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- water
- wisdom
- outlet
- lower inlet
- freeze type
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Building Environments (AREA)
Abstract
The present invention relates to a kind of lower Inlet and outlet water anti-freeze type wisdom to integrate pumping plant, including wisdom integrates pump house, and the wisdom integrates pump house bottom and is provided with the lower Inlet and outlet water anti-freeze type structure for being integrally located at underground；The under ground portion of the lower Inlet and outlet water anti-freeze type structure is provided with city planting ductwork underground water inlet and/or for user's water lower outlet, city planting ductwork underground water inlet passes through the water inlet pipe component being arranged in lower Inlet and outlet water anti-freeze type structure and is connected with the water supply component in the integrated pump house of wisdom, and for user's water the lower outlet passes through the outlet pipe component being arranged in lower Inlet and outlet water anti-freeze type structure and is connected with the water supply component in the integrated pump house of wisdom.It is freezing because of weather cold that the present invention can be avoided supply equipment.
Description
Technical field
The present invention relates to urban water supply and sewerage technical fields, more particularly to a kind of lower Inlet and outlet water anti-freeze type wisdom integration pump
It stands.
Background technique
Most of pump houses are typically mounted at basement or are directly installed on outside the room of ground currently on the market, and pumping plant is generally adopted
Take lateral inflow and water outlet.Since difference variation is very big throughout the year, particularly northern area winter is very cold, the north for China
When temperature is too low in winter, municipal secondary water-supply equipment supplies user through pump house, since municipal water supply equipment water inlet, user supply
The mouth of a river is often exposed to outside, and supply water water inlet and user's water supply pipe can usually freeze due to being influenced by severe cold weather.Equally,
When supply equipment is deactivated or repaired in winter, water supply water inlet and user's water service pipe road memory water freezing are also resulted in.Because supplying water
Directly be connected with pipeline, be difficult find supply equipment memory water freezing, supply equipment inlet and outlet be easy to happen equipment it is freezing, knot
Ice will result directly in equipment damage or scrap, and causes to supply water and interrupt, to influence the just common water of user.In certain summer humidity
The problem of larger area, there is also moisture condensation, influence normal use；It is exposed to external municipal water supply water inlet pipe and confession in order to prevent
User's outlet pipe is antifreeze, is generally embedded in frozen soil layer or less and the thicker heat preservation of covered ground by municipal water inlet pipe and for user's outlet pipe
Layer is wrapped in inlet and outlet pipes using thermal insulation material, and anti-antipriming pipe freezes and freezes, but this mode is for subzero more than ten
The cold district of degree is just without too big effect.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of lower Inlet and outlet water anti-freeze type wisdom to integrate pumping plant, can be avoided
Supply equipment is freezing because of weather cold.
The technical solution adopted by the present invention to solve the technical problems is：It is integrated to provide a kind of lower Inlet and outlet water anti-freeze type wisdom
Pumping plant, including wisdom integrate pump house, and the wisdom integrates pump house bottom and is provided with the lower Inlet and outlet water anti-freeze type for being integrally located at underground
Structure；The under ground portion of the lower Inlet and outlet water anti-freeze type structure is provided with city planting ductwork underground water inlet and/or for user's water
Ground lower outlet, city planting ductwork underground water inlet pass through the water inlet pipe component that is arranged in lower Inlet and outlet water anti-freeze type structure and
Wisdom integrates the water supply component in pump house and is connected, and for user's water the lower outlet is by being arranged in lower Inlet and outlet water anti-freeze type
Outlet pipe component in structure integrates the water supply component in pump house with wisdom and is connected.
The lower Inlet and outlet water anti-freeze type structure is the space that cement foundation pit in underground is formed.
It is provided with insulation barrel in the lower Inlet and outlet water anti-freeze type structure, the water inlet pipe component and outlet pipe component are respectively positioned on
In the insulation barrel.
Muff is provided on the outer wall of the insulation barrel.
The wisdom integrates pump house bottom opening, and the insulation barrel integrates pump house bottom by coupling arrangement and the wisdom
Aperture connection.
The wisdom integrates and is additionally provided with air exhausting device and air supply device between pump house and lower Inlet and outlet water anti-freeze type structure, institute
It states air exhausting device and air supply device and integrates space in pump house inside and lower Inlet and outlet water anti-freeze type structure for realizing the wisdom
Ambient temperature equilibrium.
Rubber and plastic muff is enclosed with outside the water inlet pipe component and outlet pipe component.
The lower Inlet and outlet water anti-freeze type structural base is equipped with draining pump, the water outlet of the draining pump and one end of drainpipe
It is connected, the other end of drainpipe leads to that the wisdom integrates the dirt discharge groove being arranged inside pump house or to lead to the lower Inlet and outlet water antifreeze
Type structure externally under sewage pipe.
The wisdom integrates pump house side and is provided with water tank.
The water tank and wisdom integrate pump house and are assembled into entirety.
Beneficial effect
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit：The present invention is by pumping plant bottom of box aperture, and by itself and lower Inlet and outlet water anti-freeze type fabric connectivity, using lower water inlet, under
The mode of the secondary water-supply component of water outlet effectively solves secondary water-supply municipal administration water inlet pipe and user's water supply outlet pipe due to exposure
Face and cause freezing situation to occur.The present invention by for the low insulation barrel of lower Inlet and outlet water anti-freeze type structure setting thermal coefficient and
Muff makes it have the effect of freeze proof heat preservation, and extraneous severe cold and wet weather cold air can be prevented anti-into lower Inlet and outlet water
Jelly type structure space, while lower Inlet and outlet water anti-freeze type structure space internal heat also being prevented to spread to outside, play freeze proof heat preservation
Effect.In addition, carrying out heat exchange by the way that exhaust fan and blowing fan are arranged in lower Inlet and outlet water anti-freeze type structure, guarantee that wisdom is integrated
Pump house inside and lower disengaging anti-freeze type structure space ambient temperature equilibrium.In addition, the lower Inlet and outlet water anti-freeze type structure in the present invention
It is additionally provided with draining pump and drainpipe, by detecting liquid automatic control, lower Inlet and outlet water anti-freeze type structural base ponding is discharged, is kept away
Exempt from that lower Inlet and outlet water anti-freeze type structure space is moist, there are stagnant water.
Detailed description of the invention
Fig. 1 is the side schematic view of first embodiment of the invention；
Fig. 2 is the schematic top plan view of first embodiment of the invention；
Fig. 3 is that another pipeline distribution schematic diagram in Inlet and outlet water anti-freeze type structure is descended in invention first embodiment；
Fig. 4 is the side schematic view of second embodiment of the invention；
Fig. 5 is the schematic top plan view of second embodiment of the invention.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiments of the present invention are related to a kind of integrated pumping plant of lower Inlet and outlet water anti-freeze type wisdom, including wisdom integrates pump house,
The wisdom integrates pump house bottom and is provided with the lower Inlet and outlet water anti-freeze type structure for being integrally located at underground；The lower Inlet and outlet water anti-freeze type
The under ground portion of structure is provided with city planting ductwork underground water inlet and/or for user's water lower outlet, the city planting ductwork
Underground water inlet passes through the water supply group being arranged in the water inlet pipe component in lower Inlet and outlet water anti-freeze type structure and the integrated pump house of wisdom
Part is connected, and for user's water the lower outlet passes through the outlet pipe component and intelligence being arranged in lower Inlet and outlet water anti-freeze type structure
Water supply component in intelligent integrated pump house is connected.Pumping plant water supply component and lower Inlet and outlet water anti-freeze type structure water inlet pipe component and outlet pipe
When component connects, anti-down flow check valve can be set on pipeline.
It can be seen that the present invention is by pumping plant bottom of box aperture, and lower Inlet and outlet water anti-freeze type fabric connectivity, under
Water inlet, the lower unique design scheme for being discharged secondary water-supply component efficiently solves secondary water-supply municipal administration water inlet pipe and user supplies water out
The water pipe freezing problem of water pipe caused by face due to exposure.
As shown in Figure 1, in present embodiment, lower Inlet and outlet water anti-freeze type structure mainly includes：Water inlet pipe component 31, outlet pipe
Component 32, underground cement foundation pit 33, insulation barrel 34, muff 35, draining pump 36, drainpipe 37, blowing fan and exhaust fan 38,
Coupling arrangement 39.As shown in Fig. 2, city planting ductwork underground in 31 one end of water inlet pipe component and lower Inlet and outlet water anti-freeze type structure 3 into
The mouth of a river is connected, and the other end is connected to wisdom and integrates pump house, the confession on 32 one end of outlet pipe component and lower Inlet and outlet water anti-freeze type structure 3
User's water lower outlet be connected, the other end be similarly connected to wisdom integrate pump house, so can be by municipal water supply through various
Valve components are transported to water tank 1, or integrate in pump house 2 after water pump secondary booster through wisdom, under passing through through the various valve components in outlet
For user's water lower outlet in Inlet and outlet water anti-freeze type structure 3 supplies user.
Mounting means of the invention is as follows：Field position prepares concrete pedestal and underground cement foundation pit 33 according to equipment,
Installation foundation scene is carried out, lower 3 modularization of Inlet and outlet water anti-freeze type structure is installed to underground cement foundation pit 33, and pipeline is connected；
Wisdom integrates pump house 2 and is lifted on concrete pedestal, in place to install；Further by the coupling arrangement of lower Inlet and outlet water anti-freeze type structure 3
39 couple with the integrated 2 bottom portion of pump house of wisdom, inlet and outlet pipes pass through pipe fitting and couple；Then power on behind water source
Normal water supply work.In this way, the keeping warmth space that lower Inlet and outlet water anti-freeze type structure 3 is constituted, is kept the temperature using underground and to Equipment Foundations
Seal approach is taken, prevents lower Inlet and outlet water anti-freeze type structure space from contacting with external environment.To install by modular construction
It is more convenient, it occupies little space simultaneously, reduces frequent maintenance and cut operating costs, reduce noise, energy conservation and environmental protection.
Better effect in order to obtain, with Inlet and outlet water anti-freeze type structure 3 can be inside underground cement foundation pit 33 at present
Insulation barrel 34 is set, and wraps up the low muff 35 of freeze proof thermal coefficient outside insulation barrel 34, under avoiding cool ambient air from entering
The space and the space heat losses for preventing lower Inlet and outlet water anti-freeze type structure 3 to constitute simultaneously that Inlet and outlet water anti-freeze type structure 3 is constituted.From
Fig. 1 can be seen that insulation barrel 34 and be coupled by coupling arrangement 39 with the aperture that wisdom integrates 2 bottom portion of pump house, so can be square
Just the installation of insulation barrel, while guaranteeing that insulation barrel has certain stability.It intakes with 3 component of Inlet and outlet water anti-freeze type structure at present
Tube assembly 31 and outlet pipe component 32 can wrap up rubber and plastic muff according to severe cold area and actual conditions, to play freeze proof heat preservation
Effect.
Additionally, due in northeast severe cold area and humid area, wisdom, which integrates pump house, generally heating device or heating,
Both pump house interior space temperature is relatively high, and the space connection wisdom that lower Inlet and outlet water anti-freezing structure 3 is constituted integrates pump house 2, pass through
Between the exhaust fan and blowing fan 38 that are arranged, the two space can carry out heat exchange, thus realize wisdom integrate 2 inside of pump house and
The ambient temperature equilibrium in lower 3 space of Inlet and outlet water anti-freeze type structure.
It is not difficult to find that the lower Inlet and outlet water anti-freeze type structure in the present invention, use underground heat preservation, external setting insulation barrel and
Thermal insulation material, water pipe package rubber and plastic muff, keeping warmth space and wisdom is wrapped up outside insulation barrel to integrate pumping plant inner space and carry out heat
Exchange maltilevel security securely keeps the temperature protection, avoids secondary water-supply equipment municipal water supply water inlet pipe and outlet pipe due to severe cold weather knot
Freeze.
Lower Inlet and outlet water anti-freeze type structure 3 in present embodiment is additionally provided with draining pump 36 and drainpipe 37, is examined by liquid level
It surveys and automatically controls, lower 3 bottom ponding of Inlet and outlet water anti-freeze type structure by drainpipe 37, is integrated pump house 2 through wisdom by draining pump 36
The dirt discharge groove discharge of inside setting can effectively avoid lower 3 space of Inlet and outlet water anti-freeze type structure humidity, asking there are stagnant water
Topic.
It is noted that water inlet pipe component 31 and outlet pipe component 32 are placed on the same lower disengaging in present embodiment
In water anti-freeze type structure, i.e., under into it is lower go out in the same anti-freeze type structure.But under present embodiment can also use individually
Into mode, i.e. water inlet pipe component 31 in anti-freeze type structure, outlet pipe component 32 using other modes be discharged；Similarly, this reality
By the way of the mode of applying can also go out under individually, i.e. in anti-freeze type structure, water inlet pipe component 31 uses outlet pipe component 32
Other modes water inlet.Furthermore it is also possible to by the way that multiple anti-freeze type structures are arranged, so that water inlet pipe component 31 and outlet pipe component 32
In different anti-freeze type structures.When using multiple anti-freeze type structures, area shared by each anti-freeze type structure is smaller, because
This its be sleeve configuration (see Fig. 1).The size of anti-freeze type structure can also be identical as the occupied area of entire pump house, as shown in figure 3,
Water inlet pipe component 31 and outlet pipe component 32 can be distributed in the two sides of lower Inlet and outlet water anti-freeze type structure 3 at this time, while for arranging
Out the drainpipe 37 of stagnant water can also be directly communicated to the lower Inlet and outlet water anti-freeze type structure externally under sewage pipe.
Second embodiment of the present invention also relates to a kind of integrated pumping plant of lower Inlet and outlet water anti-freeze type wisdom, real with first
It is roughly the same to apply mode, difference is, as shown in Figure 4 and Figure 5, wisdom integrates 2 side of pump house and is provided with water tank 1, is carrying out
When installation, water tank 1 and wisdom are integrated into pump house 2 and assemble over all Integration, after underground cement foundation pit 33 connects pipeline, water tank 1
Component and wisdom integrate in 2 equipment integral hoisting to concrete pedestal of pump house, in place to install.In addition, under in present embodiment into
It is discharged the electrical control of anti-freeze type inside configuration and monitoring, the control cabinet being all connected in the integrated pump house 2 of wisdom has and automatically controls
And monitoring function, such water tank 1, wisdom integrate pump house 2, lower 3 electrical control of Inlet and outlet water anti-freeze type structure is all uniformly connected to intelligence
The control cabinet of intelligent integrated pump house 2, to facilitate control.
In conclusion the present invention has rational design, the space of lower water inlet anti-freeze type structure composition has heat preservation and heat exchange function
Can, maltilevel security securely keeps the temperature safeguard procedures, really can effectively solve severe cold, city planting ductwork water inlet outside the pumping plant of humid area,
For user's water outlet pipe be exposed to it is outdoor be easy condense, freeze, freeze, influence user's water supply problem, prevent with Inlet and outlet water at present
Jelly type wisdom integrates pumping plant modular construction, easy for installation, reduces occupation area of equipment, reduces pump house construction cost and engineering
Amount reduces frequent maintenance and cuts operating costs, reduces noise, energy conservation and environmental protection.
Claims (10)
1. a kind of lower Inlet and outlet water anti-freeze type wisdom integrates pumping plant, including wisdom integrates pump house, which is characterized in that the wisdom is integrated
Pump house bottom is provided with the lower Inlet and outlet water anti-freeze type structure for being integrally located at underground；The underground part of the lower Inlet and outlet water anti-freeze type structure
Set up separately and be equipped with city planting ductwork underground water inlet and/or for user's water lower outlet, city planting ductwork underground water inlet is logical
It crosses the water inlet pipe component being arranged in lower Inlet and outlet water anti-freeze type structure to be connected with the water supply component in the integrated pump house of wisdom, the confession
User's water lower outlet integrated in pump house by the way that the outlet pipe component in lower Inlet and outlet water anti-freeze type structure and wisdom is arranged in
Water supply component be connected.
2. lower Inlet and outlet water anti-freeze type wisdom according to claim 1 integrates pumping plant, which is characterized in that the lower Inlet and outlet water is anti-
Jelly type structure is the space that cement foundation pit in underground is formed.
3. lower Inlet and outlet water anti-freeze type wisdom according to claim 1 integrates pumping plant, which is characterized in that the lower Inlet and outlet water is anti-
Insulation barrel is provided in jelly type structure, the water inlet pipe component and outlet pipe component are respectively positioned in the insulation barrel.
4. lower Inlet and outlet water anti-freeze type wisdom according to claim 3 integrates pumping plant, which is characterized in that outside the insulation barrel
Muff is provided on wall.
5. lower Inlet and outlet water anti-freeze type wisdom according to claim 3 integrates pumping plant, which is characterized in that the wisdom integration pump
Room bottom opening, the insulation barrel integrate pump house bottom opening with the wisdom by coupling arrangement and connect.
6. lower Inlet and outlet water anti-freeze type wisdom according to claim 1 integrates pumping plant, which is characterized in that the wisdom integration pump
Air exhausting device and air supply device are additionally provided between room and lower Inlet and outlet water anti-freeze type structure, the air exhausting device and air supply device are used
In the ambient temperature equilibrium for realizing space in the integrated pump house inside of the wisdom and lower Inlet and outlet water anti-freeze type structure.
7. lower Inlet and outlet water anti-freeze type wisdom according to claim 1 integrates pumping plant, which is characterized in that the water inlet pipe component
It is enclosed with rubber and plastic muff outside with outlet pipe component.
8. lower Inlet and outlet water anti-freeze type wisdom according to claim 1 integrates pumping plant, which is characterized in that the lower Inlet and outlet water is anti-
Jelly type structural base is equipped with draining pump, and the water outlet of the draining pump is connected with one end of drainpipe, and the other end of drainpipe is logical
To the wisdom integrate the dirt discharge groove that is arranged inside pump house or lead to the lower Inlet and outlet water anti-freeze type structure externally under row
Dirt pipe.
9. lower Inlet and outlet water anti-freeze type wisdom according to claim 1 integrates pumping plant, which is characterized in that the wisdom integration pump
Room side is provided with water tank.
10. lower Inlet and outlet water anti-freeze type wisdom according to claim 9 integrates pumping plant, which is characterized in that the water tank and intelligence
Intelligent integrated pump house is assembled into entirety.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711371849 | 2017-12-19 | ||
| CN201711371849X | 2017-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108894281A true CN108894281A (en) | 2018-11-27 |
| CN108894281B CN108894281B (en) | 2021-01-19 |
Family
ID=64358772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811004360.3A Active CN108894281B (en) | 2017-12-19 | 2018-08-30 | Intelligent integrated pump station with anti-freezing lower water inlet and outlet |
Country Status (1)
| Country | Link |
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| CN (1) | CN108894281B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240040A (en) * | 2020-10-21 | 2021-01-19 | 陕西宇阳石油科技工程有限公司 | Van-type intelligent water supply pump station for oil and gas field and water supply method |
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|---|---|---|---|---|
| FI75204C (en) * | 1986-12-01 | 1988-05-09 | Septek Ky | PUMP STATION. |
| EP0484193A1 (en) * | 1990-10-31 | 1992-05-06 | Manufacture D'appareillage Electrique De Cahors | Water meter installation protected against frost |
| US6247490B1 (en) * | 2000-01-06 | 2001-06-19 | The Gorman-Rupp Company | Booster station |
| CN201801910U (en) * | 2010-09-26 | 2011-04-20 | 上海连成（集团）有限公司 | Interface device of outdoor type pipe network pressure-superposed water supply device |
| CN203096815U (en) * | 2013-03-22 | 2013-07-31 | 成都源创环保工程有限公司 | Separated prefabricated pump station |
| CN105986619A (en) * | 2015-01-27 | 2016-10-05 | 赛莱默(中国)有限公司 | Integral rainwater/waste water lifting pump station antifreeze device |
| CN106149854A (en) * | 2015-04-20 | 2016-11-23 | 格兰富控股联合股份公司 | Prefabricated pumping plant |
| CN206110311U (en) * | 2016-10-14 | 2017-04-19 | 海澄环保科技（上海）有限公司 | Prefabricated pump station of integration with heat preservation system |
| CN206706899U (en) * | 2017-03-14 | 2017-12-05 | 安徽菲源水工业设备有限公司 | A kind of integrated prefabricated water supply pumping plant |
| CN208309685U (en) * | 2017-12-19 | 2019-01-01 | 上海熊猫机械(集团)有限公司 | A kind of integrated pumping plant of lower Inlet and outlet water anti-freeze type wisdom |
-
2018
- 2018-08-30 CN CN201811004360.3A patent/CN108894281B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI75204C (en) * | 1986-12-01 | 1988-05-09 | Septek Ky | PUMP STATION. |
| EP0484193A1 (en) * | 1990-10-31 | 1992-05-06 | Manufacture D'appareillage Electrique De Cahors | Water meter installation protected against frost |
| US6247490B1 (en) * | 2000-01-06 | 2001-06-19 | The Gorman-Rupp Company | Booster station |
| CN201801910U (en) * | 2010-09-26 | 2011-04-20 | 上海连成（集团）有限公司 | Interface device of outdoor type pipe network pressure-superposed water supply device |
| CN203096815U (en) * | 2013-03-22 | 2013-07-31 | 成都源创环保工程有限公司 | Separated prefabricated pump station |
| CN105986619A (en) * | 2015-01-27 | 2016-10-05 | 赛莱默(中国)有限公司 | Integral rainwater/waste water lifting pump station antifreeze device |
| CN106149854A (en) * | 2015-04-20 | 2016-11-23 | 格兰富控股联合股份公司 | Prefabricated pumping plant |
| CN206110311U (en) * | 2016-10-14 | 2017-04-19 | 海澄环保科技（上海）有限公司 | Prefabricated pump station of integration with heat preservation system |
| CN206706899U (en) * | 2017-03-14 | 2017-12-05 | 安徽菲源水工业设备有限公司 | A kind of integrated prefabricated water supply pumping plant |
| CN208309685U (en) * | 2017-12-19 | 2019-01-01 | 上海熊猫机械(集团)有限公司 | A kind of integrated pumping plant of lower Inlet and outlet water anti-freeze type wisdom |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240040A (en) * | 2020-10-21 | 2021-01-19 | 陕西宇阳石油科技工程有限公司 | Van-type intelligent water supply pump station for oil and gas field and water supply method |
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| Publication number | Publication date |
|---|---|
| CN108894281B (en) | 2021-01-19 |
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