CN112169595A - Voltage-stabilizing pilot type integral shunt for energy-gathering supercharging device - Google Patents
Voltage-stabilizing pilot type integral shunt for energy-gathering supercharging device Download PDFInfo
- Publication number
- CN112169595A CN112169595A CN201910590998.8A CN201910590998A CN112169595A CN 112169595 A CN112169595 A CN 112169595A CN 201910590998 A CN201910590998 A CN 201910590998A CN 112169595 A CN112169595 A CN 112169595A
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- pilot
- main valve
- cavity
- Prior art date
- 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.)
- Pending
Links
- 239000013535 sea water Substances 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 9
- 230000010354 integration Effects 0.000 claims abstract description 5
- 238000005260 corrosion Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 abstract description 10
- 238000011010 flushing procedure Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000010612 desalination reaction Methods 0.000 description 12
- 238000001223 reverse osmosis Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/10—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/14—Pressure control
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a pressure stabilizing pilot integration flow divider for an energy gathering and pressurizing device, which comprises a cavity filter and a pilot flow dividing servo valve, wherein a valve inlet port is arranged at the lower side of the cavity filter and is connected with a pilot flow dividing servo valve pipeline, the pilot flow dividing servo valve comprises a main valve, a plunger is arranged in the main valve, a main valve cavity is formed between the main valve and the plunger after assembly, a water storage device is connected with a valve outlet port pipeline of the main valve, a pressure leading pipe is arranged between the valve inlet port and the main valve and is connected with a throttling piece, the throttling piece is connected with the main valve cavity pipeline, a pilot valve is connected between the throttling piece and the main valve cavity through a pipeline, the valve outlet port of the pilot valve is connected with the water storage device through a discharge pipe, the cavity filter is adopted for pressure stabilization, the characteristic of large flow of high-pressure seawater is adapted, the pilot flow dividing servo valve is adopted for flow dividing, and the, the high-pressure seawater can be stored in a shunting way while stabilizing the pressure so as to prolong the daily fresh water production time or flushing equipment.
Description
Technical Field
The invention relates to a pressure-stabilizing pilot type integral flow divider for an energy-gathering supercharging device, and belongs to the field of seawater desalination.
Background
The seawater desalination technology can be divided into two types of water separation from seawater and salt separation from seawater according to different separated substances, and the methods for separating water from seawater include distillation, freezing, hydrate, solvent extraction and reverse osmosis; reverse osmosis, i.e., a phenomenon in which a solvent flows from a high concentration solution to a low concentration solution when the pressure is increased to a certain value; the reverse osmosis seawater desalination technology is mainly characterized in that a reverse osmosis membrane device is utilized to pressurize a seawater side, so that water molecules in seawater pass through the reverse osmosis membrane to enter a fresh water side, other components cannot be retained in the seawater through the reverse osmosis membrane, the concentration of the seawater side is increased, and the higher the salinity of the seawater is, the higher the pressure to be applied is.
The reverse osmosis seawater desalination system has requirements on the flow rate of high-pressure seawater, namely after the reverse osmosis seawater desalination system is selected, the pressure value and the flow rate of the raw material high-pressure seawater are fixed, the fluctuation in a relatively large range is not allowed, when the high-pressure seawater is directly produced by utilizing tidal energy, the change of tidal range can cause the change of the flow rate of the high-pressure seawater, the high-pressure seawater flow and pressure generated by the energy-gathering supercharging device are periodically changed in a pulsating manner due to the structural design characteristics of the plunger pump, the conventional pressure stabilizing valve is of an air bag type, the weight hammer type flow control is small, the pipeline is thin, the structure is complex, the characteristics of high flow and low requirement on stable pressure in seawater desalination are not facilitated, the valve of the spring type pressure stabilizing valve is in direct contact with seawater, is easy to corrode, and has low precision, therefore, a device is needed to be designed, so that the high-pressure seawater can be stabilized, and simultaneously, the high-pressure water flow of the reverse osmosis seawater desalination system can be controlled.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the pressure-stabilizing pilot integration splitter for the energy-gathering supercharging device, which can control the high-pressure water flow of the reverse osmosis seawater desalination system while stabilizing the high-pressure seawater.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a pressure stabilizing pilot integration flow divider for an energy gathering and pressurizing device comprises a cavity filter and a pilot flow dividing servo valve, wherein a pulsating high-pressure seawater inlet and a stable high-pressure seawater outlet are arranged on the upper side of the cavity filter, a valve inlet port is arranged on the lower side of the cavity filter and is connected with the pilot flow dividing servo valve through a pipeline, the pilot flow dividing servo valve comprises a main valve, a plunger is arranged in the main valve and is connected with the main valve through a spring, a main valve cavity is formed between the main valve and the plunger after assembly, a water storage device is connected with a valve outlet port pipeline of the main valve, a pressure guiding pipe is arranged between the valve inlet port and the main valve, the pressure guiding pipe is connected with a throttling piece, the throttling piece is connected with the main valve cavity through a pipeline, and a pilot valve is connected between the throttling piece and the main valve cavity through a pipeline, and the valve outlet port of the pilot valve is connected with the water storage device through a discharge pipe.
The cavity filter is made of a pressure-resistant metal material, and an anti-corrosion material is sprayed on the inner surface of the cavity filter.
And a metal protective shell is arranged outside the plunger and the spring, an anti-corrosion material is sprayed on the inner surface of the metal protective shell, and the plunger is subjected to oil sealing treatment.
The pressure guiding pipe is made of rubber, and the internal structure of the throttling element is made of rubber.
The invention has the beneficial effects that: the invention adopts the cavity filter to stabilize the pressure, adapts to the characteristic of large flow of high-pressure seawater, adopts the pilot flow dividing servo valve to divide the flow, can make up the defects of the pressure stabilizing valve, and has the key point that the high-pressure seawater can be divided and stored while stabilizing the pressure so as to prolong the daily fresh water production time or flushing equipment.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the pilot split servo valve of FIG. 1;
FIG. 3 is a process flow diagram for fresh water production;
FIG. 4 is a process flow diagram for extended fresh water production.
Detailed Description
Referring to fig. 1 to 3, a pressure stabilizing pilot integration splitter for an energy-gathering and pressurizing device includes a cavity filter 1 and a pilot split servo valve 2, the cavity filter 1 is a cylindrical shell structure, a pulsating high-pressure seawater inlet 3 and a stable high-pressure seawater outlet 4 are disposed on the upper side of the cavity filter 1, an inlet valve port 5 is disposed on the lower side of the cavity filter 1, the inlet valve port 5 is connected to the pilot split servo valve 2 through a pipeline, the pilot split servo valve 2 includes a main valve 6, a plunger 7 is mounted in the main valve 6, the main valve 6 is connected to the plunger 7 through a spring 9, a main valve cavity 10 is formed between the main valve 6 and the plunger 7 after assembly, an outlet valve port pipeline of the main valve 6 is connected to a water storage device 8, and a pilot pipe 11 is disposed between the inlet valve port 5 and the main valve 6, the pressure guiding pipe 11 is connected with a throttling piece 12, the throttling piece 12 is connected with the main valve cavity 10 through a pipeline, a pilot valve 13 is further connected between the throttling piece 12 and the main valve cavity 10 through a pipeline, the valve outlet of the pilot valve 13 is connected with the water storage device 8 through a discharge pipe 15, a cavity type filter 1 is adopted for stabilizing pressure, the characteristic of large high-pressure seawater flow is adapted, a pilot type flow dividing servo valve 2 is adopted for dividing flow, the defects of a pressure stabilizing valve can be overcome, and the key point is that high-pressure seawater can be divided and stored to prolong the daily fresh water production time or flushing equipment while the pressure is stabilized.
Wherein, because the valve cores of the pilot valve 13 and the main valve 6 are both springs, the relationship between the diameter of the pipeline and the compression amount of the springs is determined by the following steps: instantaneous high-pressure seawater flow q generated by energy-gathering supercharging deviceins，1Since the stable high pressure seawater of the channel 10 is supplied to the reverse osmosis seawater desalination system, q isins，2The high-pressure seawater flow q which is constantly fixed and needs to be branched instantaneously by the split-flow servo valve can be known according to the flow balanceins，3This can be determined by the following equation:
qins，3＝qins，1-qins，2
then the diameter of the flow-splitting servo valve pipe to the outlet needs to be changed according to the compression amount of the spring, so that the flow split at any moment in the compression range of the spring meets the formula, and the flow-splitting servo valve pipe can be known according to the fluid mechanics knowledge and the momentum conservation principle:
maΔua＝FΔt
F＝Kx
Δx＝Δt×ua
in the formula: q. q.sins，3Is the high pressure seawater instantaneous flow rate uins，3Is the instantaneous velocity of the high-pressure seawater which is divided out, d3Diameter of the pipe of the split-flow servo valve, maIs the mass of the slide/ball, uaIs its instantaneous speed, where uins，3＝uaK is the spring stiffness coefficient, x is the spring compression, and the following can be obtained in a simultaneous manner:
therefore, the relation between the diameter of the pipeline and the compression amount of the spring can be obtained according to the required instantaneous flow of the high-pressure seawater to be branched, and the function of the inner diameter of the pipeline is obtained.
The cavity filter 1 is made of a pressure-resistant metal material, and the inner surface of the cavity filter is sprayed with anticorrosive polytetrafluoroethylene, so that the cavity filter 1 is effectively prevented from being corroded by seawater, and the service life is prolonged.
A metal protective shell 14 is arranged outside the plunger 7 and the spring 9, an anti-corrosion material is sprayed on the inner surface of the metal protective shell 14, the plunger 7 is subjected to oil sealing treatment, the corrosion of seawater in the main valve 6 is effectively prevented, and the service life is prolonged.
The pressure guiding pipe 11 is made of rubber, and the inner structure of the throttling element 12 is made of rubber.
The invention can be applied to the following practical operations:
1. high-pressure medium as backwashing equipment
In recent years, the high-pressure cleaning technology relies on the advantages of energy conservation, unique harmlessness to environmental equipment, no pollution and no corrosion, and constantly exposes the corners completely as a novel subject method, water is adopted as a raw material, normal-pressure water is pressurized by a pressurizing device and then is sprayed out by a special nozzle device, high-pressure water can be changed into highly-gathered water jet, the high-density water jet is not only easy to clean the equipment but also can be used for cutting and crushing, the high-pressure water jet cleaning technology can clean completely-blocked pipes and scaling equipment, and conventional methods cannot clearly have toxicity and radioactivity equipment, and the proper pressure is selected to avoid damaging the substrate of the cleaned equipment, so that the occasions with complex structure, narrow space and complex operation environment can be cleaned, and the cleaning process has good controllability;
in the existing equipment, a seawater flushing gun consisting of a seawater pressurizing cylinder and a hydraulic oil cylinder which are integrally structured is adopted, the pressure is only 1Mpa, the flow rate is low, and the requirement is difficult to meet in the occasions requiring high pressure and large flow rate;
the high-pressure technology has attractive advantages, but high-pressure water is generated by energy and has strict requirements on materials of pressurizing equipment, if the flow dividing technology can be effectively utilized, pulsating high-pressure seawater flows out, and the high-pressure seawater is directly connected to the nozzle equipment after the pressure is adjusted to produce high-pressure high-density jet water which is used for flushing a frequency-adaptive high-efficiency energy-collecting pressurizing system, so that the divided high-pressure seawater is utilized, and the electric energy and the water resources required by the back flushing of the equipment are saved;
2. prolonging daily seawater desalination time
The invention utilizes high-pressure seawater to produce fresh water, so the surplus high-pressure seawater which is shunted by the high-pressure seawater can still be connected to a fresh water production system, the daily yield of the fresh water of the system is improved, the main process flow is shown in figure 4, the high-pressure seawater which is shunted by the integral shunt is stored in a water storage device which is also a pressure stabilizing device, and the high-pressure seawater is introduced into a reverse osmosis seawater desalination device after the pressure is stabilized, so the seawater desalination is continued, and the daily yield of the fresh water can be improved.
The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.
Claims (4)
1. A pressure stabilizing pilot integration flow divider for an energy gathering and pressurizing device is characterized by comprising a cavity filter (1) and a pilot flow dividing servo valve (2), wherein a pulsating high-pressure seawater inlet (3) and a stable high-pressure seawater outlet (4) are arranged on the upper side of the cavity filter (1), a valve inlet (5) is arranged on the lower side of the cavity filter (1), the valve inlet (5) is connected with the pilot flow dividing servo valve (2) through a pipeline, the pilot flow dividing servo valve (2) comprises a main valve (6), a plunger (7) is installed in the main valve (6), the main valve (6) is connected with the plunger (7) through a spring (9), a main valve cavity (10) is formed between the main valve (6) and the plunger (7) after assembly, a valve outlet pipeline of the main valve (6) is connected with a water storage device (8), a pressure guiding pipe (11) is arranged between the valve inlet (5) and the main valve (6), the pressure guiding pipe (11) is connected with a throttling piece (12), the throttling piece (12) is in pipeline connection with the main valve cavity (10), a pilot valve (13) is further in pipeline connection between the throttling piece (12) and the main valve cavity (10), and a valve outlet of the pilot valve (13) is connected with the water storage device (8) through a drainage pipe (15).
2. The voltage-stabilizing pilot-operated integral divider for the energy-gathering and pressurizing device according to claim 1, characterized in that the cavity filter (1) is made of a pressure-resistant metal material, and the inner surface is coated with an anti-corrosion material.
3. The pressure stabilizing and pilot type integral divider for the energy-gathering and pressurizing device according to claim 1 is characterized in that a metal protective shell (14) is arranged outside the plunger (7) and the spring (9), an anti-corrosion material is sprayed on the inner surface of the metal protective shell (14), and the plunger (7) is subjected to oil sealing treatment.
4. The pressure-stabilizing and pilot-operated integral divider for energy-concentrating and supercharging devices according to claim 1, characterized in that the pressure-introducing pipe (11) is made of rubber, and the inner structure of the throttle element (12) is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590998.8A CN112169595A (en) | 2019-07-02 | 2019-07-02 | Voltage-stabilizing pilot type integral shunt for energy-gathering supercharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590998.8A CN112169595A (en) | 2019-07-02 | 2019-07-02 | Voltage-stabilizing pilot type integral shunt for energy-gathering supercharging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112169595A true CN112169595A (en) | 2021-01-05 |
Family
ID=73914341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910590998.8A Pending CN112169595A (en) | 2019-07-02 | 2019-07-02 | Voltage-stabilizing pilot type integral shunt for energy-gathering supercharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112169595A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336275Y (en) * | 1998-04-15 | 1999-09-01 | 华东冶金学院 | Water pressure manostat |
| US20110006005A1 (en) * | 2009-05-18 | 2011-01-13 | Aquamarine Power Limited | Desalination system and method |
| CN203764451U (en) * | 2013-12-12 | 2014-08-13 | 天长市华润清洗科技有限公司 | Automatic pressure releasing energy storing pressure stabilizer |
| CN105439352A (en) * | 2015-01-13 | 2016-03-30 | 广东海洋大学 | Seawater desalination and salt formation integration apparatus |
| CN107327651A (en) * | 2017-06-22 | 2017-11-07 | 苏州诺纳可电子科技有限公司 | A kind of stable-pressure device |
| CN108046447A (en) * | 2017-11-20 | 2018-05-18 | 成都恒力达科技有限公司 | A kind of desalination plant based on tide energy |
| CN109630728A (en) * | 2019-01-15 | 2019-04-16 | 王欣 | A kind of pilot operated safety valve |
-
2019
- 2019-07-02 CN CN201910590998.8A patent/CN112169595A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336275Y (en) * | 1998-04-15 | 1999-09-01 | 华东冶金学院 | Water pressure manostat |
| US20110006005A1 (en) * | 2009-05-18 | 2011-01-13 | Aquamarine Power Limited | Desalination system and method |
| CN203764451U (en) * | 2013-12-12 | 2014-08-13 | 天长市华润清洗科技有限公司 | Automatic pressure releasing energy storing pressure stabilizer |
| CN105439352A (en) * | 2015-01-13 | 2016-03-30 | 广东海洋大学 | Seawater desalination and salt formation integration apparatus |
| CN107327651A (en) * | 2017-06-22 | 2017-11-07 | 苏州诺纳可电子科技有限公司 | A kind of stable-pressure device |
| CN108046447A (en) * | 2017-11-20 | 2018-05-18 | 成都恒力达科技有限公司 | A kind of desalination plant based on tide energy |
| CN109630728A (en) * | 2019-01-15 | 2019-04-16 | 王欣 | A kind of pilot operated safety valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11846305B2 (en) | Submerged reverse osmosis system | |
| EP2504080A1 (en) | Regulating pressure conditions in osmotic systems | |
| CN110762659A (en) | Multipurpose spray head | |
| CN206449220U (en) | It is a kind of to prevent the automatically cleaning valve element valve seat construction of valve sealing face slag inclusion | |
| CN112169595A (en) | Voltage-stabilizing pilot type integral shunt for energy-gathering supercharging device | |
| CN206846172U (en) | A kind of elastic membrane protecting water hammer device | |
| CN205841893U (en) | Throttle | |
| CN203603214U (en) | Water supply quick response device with adjusting function | |
| CN203315803U (en) | Compact type underwater gas-liquid separation system | |
| CN208804294U (en) | A kind of combined fluid pressure regulator valve | |
| CN203462523U (en) | Novel overlying variable frequency water supply system with water purification and filtration function | |
| CN102853155A (en) | Adjustable pressure reducing valve with high pressure reducing ratio | |
| CN205138557U (en) | Portable steady voltage measurement system | |
| CN201586589U (en) | Intelligent high atomization water adding device | |
| CN104373748A (en) | Pipeline corrosion inhibitor coating cleaner | |
| CN207871793U (en) | It polymerize alkali high-pressure injection and inhibits the wind-borne dust device | |
| CN204717076U (en) | A kind of reduction valve | |
| CN204729368U (en) | A kind of automatic reverse seawater boost device that can be applicable to abyssal environment | |
| CN204098882U (en) | Oil, gas well liquid loading Novel nozzle | |
| CN209146361U (en) | A kind of valve body for preventing from getting rusty | |
| CN207687085U (en) | A kind of novel pressure reducing valve for being conveniently replaceable seal assembly | |
| CN203329863U (en) | Oil filter | |
| RU2790128C1 (en) | Reverse osmosis plant | |
| CN106522915A (en) | Gas-liquid separation device used for natural gas horizontal well pump exhausting | |
| CN207062039U (en) | Counter-infiltration system with intersegmental supercharging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |