CN107061226A - A kind of inexpensive different liquid level inducing methods - Google Patents
A kind of inexpensive different liquid level inducing methods Download PDFInfo
- Publication number
- CN107061226A CN107061226A CN201710270576.3A CN201710270576A CN107061226A CN 107061226 A CN107061226 A CN 107061226A CN 201710270576 A CN201710270576 A CN 201710270576A CN 107061226 A CN107061226 A CN 107061226A
- Authority
- CN
- China
- Prior art keywords
- liquid level
- level
- electrode
- high level
- condensate
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Non-Electrical Variables (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The present invention provides a kind of inexpensive different liquid level inducing methods, and inexpensive different liquid level inducing methods are used for the condensate discharge device with multi-level inductor, step one, are commonly allowed, be polled and judge whether low liquid level；Step 2, high level is judged whether if detecting the presence of low liquid level and waiting；Step 3, prepare draining if detecting the presence of high level i.e. high level lid and crossing high level electrode, the present invention provides a kind of inexpensive different liquid level inducing methods, the condensate liquid of the heterogeneity condensed for different pipelines is precisely discharged, that is, is excluded condensate liquid and also ensured that useful hyperbar air is not excluded simultaneously.Blocked up so as to reduce the gas in pipeline system, reduce the load of air compressor machine, saved the energy, while saving a large amount of human costs so that total system more efficient energy-saving.
Description
Technical field
The present invention relates to liquid level inducing method field, more particularly to a kind of inexpensive different liquid level sensing sides
Method.
Background technology
The gas that air forms high pressure after air compressor is conveyed to using anticyclonic machinery equipment, Bu Guo
During this, conveying high-pressure gas temperature after piping can be reduced, so as to produce some condensed fluids.When these condensate liquids are long
Between accumulation gas can be caused to block up to pipeline, be also easy to corrosion pipeline, cause some potential safety hazards, so needing periodically to discharge these cold
Lime set.But if discharge is not proper, it is easy to by useful gas outlet pipe road, cause air pressure to reduce, air compressor machine load increases
Plus, power consumption increase.By artificial regular discharge, rule of thumb, maintenance is kept an eye on by special messenger, so time and effort consuming, in cost of labor
Seem elevated today very uneconomical, and condensed water sometimes displacement with seasonal weather etc. influence change, manually very
Difficulty gets hold of draining rhythm, it is possible to cause discharge not in time, so as to cause pipeline gas to block up.In addition traditional air compressor liquid
Position detection means mainly uses direct contact type level sensing, because the gas in pneumatics device pipeline has been possible to certain corrosion
Property, level sensing often causes the infringement of accumulation property to inductor when directly contacting.In addition traditional detection is using single
Liquid level, the shortcoming of the condensate liquid of single liquid level is the speed for the amount and condensed water ponding that can not obtain draining, if root in addition
Condensate liquid is discharged according to low liquid level, it is impossible to accurately hold the accuracy of discharge, cause gases at high pressure to be lost, waste the energy, in addition also
Frequently unlatching is possible to, causes equipment life to reduce.If only exist high level electrode, then opening for water trap can be reduced
Stop frequency, but water level decreasing closes water trap just without reference to point to what degree, it is equally possible to exist and discharge useful height
Calm the anger the situation of body.
The content of the invention
In order to solve above-mentioned problem, the present invention provides a kind of inexpensive different liquid level inducing methods, pin
The condensate liquid of the heterogeneity condensed to different pipelines is precisely discharged, that is, is excluded condensate liquid and also ensured useful height simultaneously
Pneumatic air is not excluded.Blocked up so as to reduce the gas in pipeline system, reduce the load of air compressor machine, saved the energy, simultaneously
Save a large amount of human costs so that total system more efficient energy-saving, for up to this purpose, the present invention provide it is a kind of it is inexpensive not
With liquid level inducing method, inexpensive different liquid level inducing methods are used for the condensate discharge with multi-level inductor
Device, is comprised the following steps that：
Step one, commonly allowed, be polled and judge whether low liquid level, when water level is less than electrode, with condensed water
Into the holding vessel of water trap, when reaching low water line, contacted with low water level electrode, be across casing-contact, at this time here
Low position electrode is contacted with water, and electric capacity diminishes so that the frequency shift of detection liquid level circuit output, single-chip microcomputer can just recognize what is changed
Frequency, so as to find that the ponding of low liquid level occurs, returns back to common permission if not；
Step 2, high level is judged whether if detecting the presence of low liquid level and waiting, with the accumulation of condensate liquid, liquid in housing
The rise of position, moves closer to high level electrode, when touching high level electrode, the electric capacity of high level electrode diminishes, high level
Signal is produced, and continues waiting for judging if not；
Step 3, prepares draining, now controller detects height if detecting the presence of high level i.e. high level lid and crossing high level electrode
Liquid level signal, water trap valve is opened according to fixed flow, and valve opening 4S clocks detect low liquid level again after then waiting 3S clocks
Sensor, if low liquid level signal is also present, then continue on valve 4S clocks, then proceedes to wait 3S, so circulation, until
Low liquid level blackout, then stop draining and close valve.
Further improvement of the present invention, step 3 is performed in drainage procedure enters alert status more than 3 times, if low liquid level
Signal is not disappeared, then open warning function, illustrates condensate discharge device dysfunction, and alarm lamp is automatically turned on.
Further improvement of the present invention, the detection liquid level circuit is by NE555 chips and 74AHC1G04GW chipsets
Into the main circuit of the present invention is made up of NE555 chips and 74AHC1G04GW chips, and physical circuit is by NE555 integrated circuit structures
Into astable circuit.This circuit does not have stable state, only exists two temporary stable states, circuit is also without external trigger signal, profit
Charged with power supply through R1, R2 to C1, and C1 discharges through R2 to discharge end, is that circuit produces vibration.Electric capacity C1 exists（1/3）VDD
With（2/3）It is charged and discharged between VDD, so as to obtain a series of square wave in output end.And electric capacity C1 is then by a spiral shell
Revolve electrode to constitute, if liquid and electrode will diminish close to so C1, thus frequency will be accelerated.Known using C51 single-chip microcomputers
Other frequency situation of change, it is possible to which it is a kind of method of common measurement water level to know the method.
Further improvement of the present invention, the condensate discharge device with multi-level inductor includes condensate liquid hydrops shell
Body, control and supply unit and magnetic valve, the condensate liquid hydrops housing side have on magnetic valve, the condensate liquid hydrops housing
There are control and supply unit in side, and the condensate liquid hydrops housing includes cast iron housing and nylon plastic(s) sleeve pipe, the nylon plastic(s)
Coaxial multi-level induction electrode is installed, the control turns DC24V power supplys with supply unit comprising single-chip microcomputer and AC220V in sleeve pipe
Component, condensate liquid hydrops housing of the present invention, for depositing condensate liquid, control and supply unit, for controlling magnetic valve to start pass
Close, the electric energy of control circuit and magnetic valve is provided in addition, magnetic valve then controls condensate discharge, prevents gas leak, condensate liquid
Hydrops housing, including cast iron housing and nylon plastic(s) sleeve pipe, wherein install the coaxial multi-level of the present invention in nylon plastic(s) sleeve pipe
Induction electrode.
Further improvement of the present invention, the coaxial multi-level induction electrode is serially connected by least three 2cm electrode,
It is mutually isolated again with insulating materials, the coaxial multi-level induction electrode of the present invention is serially connected by least three 2cm electrode, this
Design is seldom used for level sensor at present, is that applicant creates, and simple in structure and low in cost.
A kind of inexpensive different liquid level inducing methods of the present invention, specific advantage is as follows compared with prior art：
1）The design method is using the indirect contact detection means for adding nylon sleeve isolation, it is possible to reduce corrosive gas is to sense
Device is answered to cause the infringement of accumulation property.
2）The design method is using two position while detection technique, high level state and low liquid level shape can be detected simultaneously
State.High level state and low liquid level state are very big to the meaning of the energy-saving and emission-reduction of this equipment, and this equipment changes according to two position
Efficient discharge condensate liquid scheme is realized, and avoids pressure-air from being lost.
3）The design method greatly saves human cost, only needs periodic maintenance inspection without artificial regular check and discharge
It is whether working properly, especially suitable unattended air compressor plant or the factory for having a large amount of air compressor machines
4）The design method can be through being likely to reduced caused by condensate discharge duct pressure loss and change, make pipeline
Pressure even running, and it is more efficient to discharge condensate liquid.
5）The design method can be not only used for malleation air compressor machine pipeline, can also be transformed into and be installed on negative pressure pressure pipe
The condensate discharge device in road.The condensate drain that seal reconstruction is various gas pipelines, such as one can also be reinforced in addition
A little special gas, such as oxygen, hydrogen, methane, natural gas etc..
Brief description of the drawings
Fig. 1 is workflow diagram of the present invention；
Fig. 2 is global facility graph of a relation of the present invention；
Fig. 3 is schematic diagram when water level of the present invention is less than electrode；
Fig. 4 is schematic diagram when low liquid level of the present invention reaches low liquid level electrode；
Fig. 5 is schematic diagram when high level lid of the present invention crosses high level electrode preparation draining；
Fig. 6 is that condensed water of the present invention excludes schematic diagram when outside housing.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
The present invention provides a kind of inexpensive different liquid level inducing methods, the heterogeneity condensed for different pipelines
Condensate liquid is precisely discharged, that is, is excluded condensate liquid and also ensured that useful hyperbar air is not excluded simultaneously.So as to reduce pipe
Gas in road system is blocked up, and is reduced the load of air compressor machine, has been saved the energy, while saving a large amount of human costs so that overall system
System more efficient energy-saving.
As an embodiment of the present invention, the present invention provides a kind of inexpensive different liquid level inducing methods, it is low into
This different liquid level inducing methods are used for the condensate discharge device with multi-level inductor, comprise the following steps that：
Step one, commonly allowed, be polled and judge whether low liquid level, water level be less than electrode when as shown in figure 3, with
The holding vessel that condensed water enters water trap, when reaching low water line, contacted with low water level electrode, is connect across sleeve pipe here
Touch, at this time low position electrode is contacted with water, and electric capacity diminishes so that the frequency shift of detection liquid level circuit output, single-chip microcomputer is with regard to energy
The frequency changed is recognized, so as to find that the ponding of low liquid level occurs, common permission is returned back to if not；
Step 2, judges whether high level, as shown in Figure 4 with the product of condensate liquid if detecting the presence of low liquid level and waiting
Poly-, the rise of liquid level in housing moves closer to high level electrode, when touching high level electrode, the electric capacity of high level electrode
Diminish, high level signal is produced, continue waiting for judging if not；
Step 3, prepares draining, as shown in Figure 5 now controller if detecting the presence of high level i.e. high level lid and crossing high level electrode
High level signal is detected, water trap valve is opened as shown in Figure 6 according to fixed flow, then valve opening 4S clocks wait 3S
Again low liquid level sensor is detected after clock, if low liquid level signal is also present, then continue on valve 4S clocks, then proceed to
3S is treated, so circulation, until low liquid level blackout, then stop draining and close valve.
As a kind of specific embodiment of the invention, the present invention provides a kind of inexpensive different liquid level inducing methods,
The different liquid level inducing methods of low cost are used for the condensate discharge device with multi-level inductor, the band multi-level sensing
The condensate discharge device of device includes condensate liquid hydrops housing, control and supply unit and magnetic valve, the condensate liquid as shown in Figure 2
Hydrops housing side, which has above magnetic valve, the condensate liquid hydrops housing, control and supply unit, the condensate liquid hydrops shell
Body includes installing coaxial multi-level induction electrode, the control in cast iron housing and nylon plastic(s) sleeve pipe, the nylon plastic(s) sleeve pipe
System turns DC24V power supply modules with supply unit comprising single-chip microcomputer and AC220V, and condensate liquid hydrops housing of the present invention is cold for depositing
Lime set, control and supply unit, for controlling magnetic valve to start closing, provide the electric energy of control circuit and magnetic valve, electricity in addition
Magnet valve then controls condensate discharge, prevents gas leak, condensate liquid hydrops housing, including cast iron housing and nylon plastic(s) sleeve pipe,
The coaxial multi-level induction electrode of the present invention is wherein installed, the coaxial multi-level induction electrode is by least in nylon plastic(s) sleeve pipe
3 2cm electrode is serially connected, then is mutually isolated with insulating materials, and the coaxial multi-level induction electrode of the present invention is by least three
2cm electrode is serially connected, it is this design at present seldom be used for level sensor, be applicant original creation, and it is simple in construction into
This is cheap, comprises the following steps that as shown in Figure 1：
Step one, commonly allowed, be polled and judge whether low liquid level, water level be less than electrode when as shown in figure 3, with
The holding vessel that condensed water enters water trap, when reaching low water line, contacted with low water level electrode, is connect across sleeve pipe here
Touch, at this time low position electrode is contacted with water, and electric capacity diminishes so that the frequency shift of detection liquid level circuit output, single-chip microcomputer is with regard to energy
The frequency changed is recognized, so as to find that the ponding of low liquid level occurs, common permission is returned back to if not；
The detection liquid level circuit is is made up of NE555 chips and 74AHC1G04GW chips, and the main circuit of the present invention is by NE555
Chip and 74AHC1G04GW chips composition, physical circuit is the astable circuit being made up of NE555 integrated circuits.This circuit
There is no stable state, only exist two temporary stable states, circuit is charged using power supply also without external trigger signal through R1, R2 to C1, with
It is that circuit produces vibration and C1 discharges through R2 to discharge end.Electric capacity C1 exists（1/3）VDD and（2/3）It is charged and discharged between VDD,
So as to obtain a series of square wave in output end.And electric capacity C1 is made up of a screw electrode, if liquid and electrode
It will diminish close to so C1, thus frequency will be accelerated.Frequency situation of change is recognized using C51 single-chip microcomputers, it is possible to know
The method is a kind of method of common measurement water level；
Step 2, judges whether high level, as shown in Figure 4 with the product of condensate liquid if detecting the presence of low liquid level and waiting
Poly-, the rise of liquid level in housing moves closer to high level electrode, when touching high level electrode, the electric capacity of high level electrode
Diminish, high level signal is produced, continue waiting for judging if not；
Step 3, prepares draining, as shown in Figure 5 now controller if detecting the presence of high level i.e. high level lid and crossing high level electrode
High level signal is detected, water trap valve is opened as shown in Figure 6 according to fixed flow, then valve opening 4S clocks wait 3S
Again low liquid level sensor is detected after clock, if low liquid level signal is also present, then continue on valve 4S clocks, then proceed to
3S is treated, so circulation, until low liquid level blackout, then stop entering early warning more than 3 times in draining closing valve, drainage procedure
State, if low liquid level signal does not disappear, then open warning function, illustrates condensate discharge device dysfunction, alarm lamp is certainly
It is dynamic to open.
The above described is only a preferred embodiment of the present invention, being not the limit for making any other form to the present invention
System, and any modification made according to technical spirit of the invention or equivalent variations, still fall within model claimed of the invention
Enclose.
Claims (5)
1. a kind of inexpensive different liquid level inducing methods, inexpensive different liquid level inducing methods are used for many liquid
The condensate discharge device of position inductor, is comprised the following steps that, it is characterised in that：
Step one, commonly allowed, be polled and judge whether low liquid level, when water level is less than electrode, with condensed water
Into the holding vessel of water trap, when reaching low water line, contacted with low water level electrode, be across casing-contact, at this time here
Low position electrode is contacted with water, and electric capacity diminishes so that the frequency shift of detection liquid level circuit output, single-chip microcomputer can just recognize what is changed
Frequency, so as to find that the ponding of low liquid level occurs, returns back to common permission if not；
Step 2, high level is judged whether if detecting the presence of low liquid level and waiting, with the accumulation of condensate liquid, liquid in housing
The rise of position, moves closer to high level electrode, when touching high level electrode, the electric capacity of high level electrode diminishes, high level
Signal is produced, and continues waiting for judging if not；
Step 3, prepares draining, now controller detects height if detecting the presence of high level i.e. high level lid and crossing high level electrode
Liquid level signal, water trap valve is opened according to fixed flow, and valve opening 4S clocks detect low liquid level again after then waiting 3S clocks
Sensor, if low liquid level signal is also present, then continue on valve 4S clocks, then proceedes to wait 3S, so circulation, until
Low liquid level blackout, then stop draining and close valve.
2. a kind of inexpensive different liquid level inducing methods according to claim 1, it is characterised in that：Step 3 is held
Enter alert status more than 3 times in row drainage procedure.
3. a kind of inexpensive different liquid level inducing methods according to claim 1, it is characterised in that：The detection
Liquid level circuit is to be made up of NE555 chips and 74AHC1G04GW chips.
4. a kind of inexpensive different liquid level inducing methods according to claim 1, it is characterised in that：The band is more
The condensate discharge device of level sensor includes condensate liquid hydrops housing, control and supply unit and magnetic valve, the condensate liquid
Hydrops housing side, which has above magnetic valve, the condensate liquid hydrops housing, control and supply unit, the condensate liquid hydrops shell
Body includes installing coaxial multi-level induction electrode, the control in cast iron housing and nylon plastic(s) sleeve pipe, the nylon plastic(s) sleeve pipe
System turns DC24V power supply modules with supply unit comprising single-chip microcomputer and AC220V.
5. a kind of inexpensive different liquid level inducing methods according to claim 4, it is characterised in that：It is described coaxial
Multi-level induction electrode is serially connected by least three 2cm electrode, then is mutually isolated with insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710270576.3A CN107061226A (en) | 2017-04-24 | 2017-04-24 | A kind of inexpensive different liquid level inducing methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710270576.3A CN107061226A (en) | 2017-04-24 | 2017-04-24 | A kind of inexpensive different liquid level inducing methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107061226A true CN107061226A (en) | 2017-08-18 |
Family
ID=59604238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710270576.3A Pending CN107061226A (en) | 2017-04-24 | 2017-04-24 | A kind of inexpensive different liquid level inducing methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107061226A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296493A (en) * | 2019-07-31 | 2019-10-01 | 无锡市凯灵电子有限公司 | A kind of constant temperature and humidity machine water leak-proof method and leakage-proof apparatus |
| CN111448393A (en) * | 2017-11-10 | 2020-07-24 | 阿斯彭水泵有限公司 | Liquid level sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203532195U (en) * | 2013-09-27 | 2014-04-09 | 上海士诺科技有限公司 | Zero-air consumption automatic drain valve for draining air compressor system condensate water |
| US20150040311A1 (en) * | 2013-08-09 | 2015-02-12 | Zodiac Cabin Controls Gmbh | Grey water interface valve liquid level sensor system |
| WO2015181143A1 (en) * | 2014-05-26 | 2015-12-03 | Cnh Industrial Belgium Nv | Sensor arrangement for combine harvester |
| CN106052799A (en) * | 2016-07-27 | 2016-10-26 | 神龙电气有限公司 | High-accuracy water level sensor |
| CN205808506U (en) * | 2016-07-27 | 2016-12-14 | 神龙电气有限公司 | Level sensor |
-
2017
- 2017-04-24 CN CN201710270576.3A patent/CN107061226A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150040311A1 (en) * | 2013-08-09 | 2015-02-12 | Zodiac Cabin Controls Gmbh | Grey water interface valve liquid level sensor system |
| CN203532195U (en) * | 2013-09-27 | 2014-04-09 | 上海士诺科技有限公司 | Zero-air consumption automatic drain valve for draining air compressor system condensate water |
| WO2015181143A1 (en) * | 2014-05-26 | 2015-12-03 | Cnh Industrial Belgium Nv | Sensor arrangement for combine harvester |
| CN106052799A (en) * | 2016-07-27 | 2016-10-26 | 神龙电气有限公司 | High-accuracy water level sensor |
| CN205808506U (en) * | 2016-07-27 | 2016-12-14 | 神龙电气有限公司 | Level sensor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111448393A (en) * | 2017-11-10 | 2020-07-24 | 阿斯彭水泵有限公司 | Liquid level sensor |
| US11604003B2 (en) | 2017-11-10 | 2023-03-14 | Aspen Pumps Limited | Liquid level sensor |
| US11788750B2 (en) | 2017-11-10 | 2023-10-17 | Aspen Pumps Limited | Liquid level sensor |
| CN110296493A (en) * | 2019-07-31 | 2019-10-01 | 无锡市凯灵电子有限公司 | A kind of constant temperature and humidity machine water leak-proof method and leakage-proof apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102735437A (en) | Test machine for service life of valve core of water heating product | |
| CN107061226A (en) | A kind of inexpensive different liquid level inducing methods | |
| CN110374850A (en) | A kind of sewage pumping station intelligent and high-efficiency management system and its control method | |
| CN201724204U (en) | Condensed water recovery system | |
| CN206772755U (en) | A kind of measuring system of desulfurization carbide slag slurry parameter | |
| CN202382452U (en) | Electronic automatic water leak alarm device of solar water tank | |
| CN107024410A (en) | A kind of measuring system of desulfurization carbide slag slurry parameter | |
| CN102735290A (en) | Flow testing machine of water heating product | |
| CN104238535B (en) | Intelligent fluid management system | |
| JP2019073975A (en) | Fuel supply system and fuel supply method | |
| CN201650660U (en) | Liquid level type intelligent ball valve drainer | |
| CN107404069B (en) | Oil discharge monitoring system of offshore transformer substation | |
| CN106563347B (en) | Gypsum rotational flow supernatant buffer tank for wet desulfurization system and application | |
| CN207641283U (en) | Lime stone slurry exhaust system | |
| CN207210224U (en) | A kind of anaerobic sludge digestion foam automaton | |
| CN206730848U (en) | Flue gas desulfurization pH value measurement apparatus | |
| CN221222384U (en) | Wet flue gas desulfurization tower salinity and PH measuring device | |
| CN104481792B (en) | Water level detecting and control device and method | |
| CN206563179U (en) | Storage tank siphon port automatic dehydration return-flow system without refluxing opening | |
| CN209482396U (en) | A kind of circulating water line system being automatically closed | |
| CN104697922A (en) | Concrete acid and alkali resistance testing device | |
| CN216591105U (en) | Water supply network antiseep device | |
| CN207920823U (en) | A kind of pneumatic automatic start-stop type pneumatic sump pump | |
| CN205991008U (en) | Middle pump control unit | |
| CN220019511U (en) | PH detection 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 |
Application publication date: 20170818 |
|
| RJ01 | Rejection of invention patent application after publication |