CN101004365A - precision sampler - Google Patents
precision sampler Download PDFInfo
- Publication number
- CN101004365A CN101004365A CN 200610037954 CN200610037954A CN101004365A CN 101004365 A CN101004365 A CN 101004365A CN 200610037954 CN200610037954 CN 200610037954 CN 200610037954 A CN200610037954 A CN 200610037954A CN 101004365 A CN101004365 A CN 101004365A
- Authority
- CN
- China
- Prior art keywords
- module
- sending
- piston
- sampler
- plane valve
- 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
- 238000004891 communication Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 4
- 230000004807 localization Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 abstract description 26
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 5
- 238000004458 analytical method Methods 0.000 abstract description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 15
- 239000000523 sample Substances 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000541 pulsatile effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Abstract
A precise sampler belongs to a sampling device in the liquid substance analysis process and comprises a sending device, a reversing device and a driving control unit, wherein the sending device mainly comprises a sending pipe, a piston, a screw rod and a stepping motor, the reversing device mainly comprises a plane valve and a low-speed motor, and the driving control unit comprises a hardware part and an application software part, wherein the hardware part comprises driving, detecting, inputting, displaying, triggering, communicating, a power supply and the like. The invention is used for sampling and sending liquid, under the control of a single chip microcomputer, the motor drives the screw rod to drive the piston to advance and retreat in the sending pipe, and the motor drives the plane valve to reverse in time, so as to finish the work of accurately sending liquid according to the preset quantity and sampling compensation at any time, has the remarkable advantages of accurate sample sending, perfect function, reliable work and long service time, and can meet the requirement of normal work of an on-line analytical instrument.
Description
Technical field
The present invention relates to a kind of sampler of liquid substance, especially for the accurate sampler of the liquid substance in the online analytical instrument.
Background technology
In the sample analysis of liquid substance, reproducibility error is meant same operator, under the same conditions, and the error of bringing with same apparatus measures, the error that operator's operation brings is occupied very big proportion in this error, and operator's operate miss mainly is a sampling error.Particularly in the online analytical instrument, automatic sampling system stable, reliably be the key of online analytical instrument operate as normal.In addition, the sampling for some toxic reagents needs a kind of automatic sampling device to finish sampling work especially.
At present, the automatic sampling part of most on-line instruments all adopts peristaltic pump to add the device sampling of pump line, and the shortcoming of this scheme is exactly that service time is short, because after using a period of time, pump line can be out of shape, will influence sampling precision after the pump line distortion.In addition, the corrosion resistance of pump line is also undesirable, and when use had the reagent of certain viscosity, pump head extruding pump line place was owing to extruding is clung pump line, and sampling can not normally be carried out.Simultaneously, this device control function is imperfection also, and result of use is relatively poor.
Therefore, to the reagent of severe corrosive, to sticking reagent, to the repeated demanding occasion of taking a sample, for the automatic sampling of on-line equipment, existing sampler can not satisfy the operate as normal needs of online analytical instrument.
Summary of the invention
It is long that the technical problem to be solved in the present invention provides a kind of service time, reliable operation, perfect in shape and function, can be according to setting the accurately accurate sampler of the liquid substance of sampling of sampling amount, this sampler result of use is good, can satisfy the needs of the operate as normal of online analytical instrument.
Technical scheme of the present invention is: accurate sampler comprises dispensing device, reversing arrangement, driving control unit, described dispensing device mainly is made of transmission pipe, piston, screw mandrel, stepper motor, piston is positioned at and sends pipe, screw mandrel one end links to each other with piston, and stepping motor rotor matches with screw mandrel by nut; Described reversing arrangement mainly is made of plane valve, slowspeed machine, and an interface of plane valve links to each other with the transmission pipe by conduit, and other interface of plane valve links to each other with feed tube with drain pipe respectively; Described driving control unit is electrically connected with above-mentioned motor; Above-mentioned transmission pipe, piston, plane valve, conduit all adopt resistant material.
Further scheme is: described driving control unit is made up of hardware and software two parts, and hardware components comprises power driver module, detection and localization module, parameter input module, display part, trigger control module, communication module, power supply; Software section is an application software module; Described detection and localization module is that single-chip microcomputer also comprises photoelectrical coupler, shadow shield or microswitch; Described parameter input module is a keyboard; Described display part is a charactron; Described trigger control module is a trigger button; Described communication module is a communication interface, directly or by network links to each other with computing machine; Described application software module comprises Control Software, traffic volume is calculated, shows control, read key, communications portion; Above-mentioned shadow shield be contained on the screw mandrel and plane valve rotating shaft on, photoelectrical coupler is fixed on peripheral relevant position.
Adopt above technical scheme, dispensing device is formed by sending pipe, piston, stepper motor, screw mandrel and photoelectrical coupler, shadow shield, the pulse of being sent by single-chip microcomputer drives screw mandrel through driver (power driver module) drive stepping motor and advances or retreat, one end of screw mandrel is equipped with piston, and piston advances in sending pipe or retreats is exactly to push away sample or inhale the sample process.The advance amount of screw mandrel is determined by sampling amount, sampling amount is by the keyboard or the computing machine input of accurate sampler, when screw mandrel moves to the maximum that sends pipe or minimum position, shadow shield enters into photoelectrical coupler, or pin microswitch by sheet, have a switching signal to deliver to single-chip microcomputer this moment, and single-chip microcomputer can be judged the position of screw mandrel.When the not enough sampling amount of amount of reagent in the transmission pipe, single-chip microcomputer is controlled the reversal valve commutation automatically, sample is inhaled in the stepper motor counter-rotating in the dispensing device, after reagent is filled in the transmission pipe, the commutation of Single-chip Controlling reversing unit, stepper motor drive screw mandrel advances and continues to send, and equals default sampling amount up to traffic volume, and process of transmitting stops.
Inhaling the reversing arrangement of sample and transmission is made up of slowspeed machine, shadow shield, photoelectrical coupler, two-position three way plane valve, the rotation of motor is subjected to Single-chip Controlling, the motor turned position is by shadow shield and photoelectrical coupler control, when shadow shield enters in the photoelectrical coupler, the output level of photoelectrical coupler changes, after single-chip microcomputer detects this variation, promptly send the order that stops operating.
Driving, control module are made up of hardware and software two parts, and hardware components comprises power drive, single-chip microcomputer, keyboard, demonstration, trigger button, communication interface, power supply etc.Software section comprises several typical agents temperature and the density table of comparisons, sends volume calculation, send reagent quality, send that pulse control sample introduction parts rotate, judge sample feeding rod position, the commutation of control reversing unit, receive the parameter setting, control shows, judge and receive trigger pip, and computing machine communication etc. according to sending the density calculation of volume with input.
The present invention cooperatively interacts by mechanical drive, electronic circuit, application software and finishes accurate sampling task, and perfect in shape and function, result of use are good.
This sampler is owing to the parts that transmission pipe, piston, plane valve, conduit etc. contact with liquid medium all adopt resistant material, can select polytetrafluoroethylmaterial material for use, therefore to severe corrosive reagent and sticking reagent, can be not undermined and stop up, reliable operation, service time is long.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the circuit connection diagram of driving of the present invention, control section.
Embodiment
With reference to accompanying drawing, in the dispensing device of accurate sampler of the present invention, screw mandrel 3 drive piston 5 under stepper motor 4 drives advances in transmission pipe 6 or retreats, and the screw mandrel external part is equipped with shadow shield 2, the peripheral side relevant position fixed light electric coupler 1 of screw mandrel.The pulse that single-chip microcomputer 21 sends is through driver 16 drive stepping motor, single-chip microcomputer whenever sends pulsatile once a bat, the angle that every bat stepper motor rotates is called the step angle of stepper motor, and the size of step angle is decided according to selected motor, and the step angle of supposing this stepper motor is β °.The forward or reverse of stepper motor is by Single-chip Controlling, drives screw mandrel during forward or reverse and advances or retreat, and just transfers circular motion to rectilinear motion, and the speed of screw mandrel motion is controlled by pitch, supposes that the stepper motor screw mandrel that turns around advances or retreats Xmm.One end of screw mandrel is equipped with piston, and piston advances in sending pipe or retreats is exactly to push away sample or inhale the sample process, and the advance amount of screw mandrel supposes that by setting the sampling amount decision sectional area of transmission pipe is Amm
2, then single-chip microcomputer whenever sends pulsatile once, sends the amount of reagent of (absorption) and presses following calculating:
In the reversing arrangement, the rotating shaft of two-position three way plane valve 11 links to each other with the output shaft of motor 12, and anti-dazzling screen 13 is contained in the rotating shaft, and photoelectrical coupler 14 is fixed on peripheral relevant position.An interface of plane valve is linked to each other with the joint 7 that sends pipe by conduit 8, and all the other interfaces link to each other with drain pipe 9, feed tube 10 respectively.When motor 12 forwarded desired location to, shadow shield entered in the photoelectrical coupler, and the output of photoelectrical coupler is connected to the I/0 mouth of single-chip microcomputer, and single-chip microcomputer is controlled the motor stall after receiving this signal.
Driving, control module hardware components are made up of single-chip microcomputer 21, driver 15,16, display part 17, keyboard 18, trigger button 19, communication interface 20, power Vcc etc., (take a sample and commutate by drive stepping motor of V1～Vn) or motor by triode or field effect transistor for one-chip machine port, display part 17 usefulness charactron display parameter, sampling result, outside startup sampling is controlled by one-chip machine port, communication interface 20 adopts RS232 to link to each other with computing machine with USB, and parameter setting and sampling process can be finished by sampler keyboard and computing machine.
Application software partly comprises several typical agents temperature and the density table of comparisons, calculate the volume that sends reagent with following formula, send the quality of reagent again according to the reagent density calculation, the result is delivered to display or computing machine, the reception parameter is provided with, judge the position of screw mandrel and reversing unit, with the computing machine communication etc.
During use, with sampler keyboard or computing machine input amount of reagent to be got, parameters such as temperature, density are then by keyboard or external trigger or computer starting sampling process earlier, when reagent is not enough in sending pipe, single-chip microcomputer is inhaled sample automatically, be filled the back and send a little and carry out the room compensation, after the plane valve commutated to send the position, continue to send, up to sending to the setting sampling amount, then process of transmitting finishes, and will send the result simultaneously and send demonstration or computing machine.
Claims (9)
1, a kind of accurate sampler, it is characterized in that comprising dispensing device, reversing arrangement, driving control unit, described dispensing device mainly is made of transmission pipe, piston, screw mandrel, stepper motor, piston is positioned at and sends pipe, screw mandrel one end links to each other with piston, and stepping motor rotor matches with screw mandrel by nut; Described reversing arrangement mainly is made of plane valve, slowspeed machine, and an interface of plane valve links to each other with the transmission pipe by conduit, and other interface of plane valve links to each other with feed tube with drain pipe respectively; Described driving control unit is electrically connected with above-mentioned motor; Above-mentioned transmission pipe, piston, plane valve, conduit all adopt resistant material.
2, by the described accurate sampler of claim 1, it is characterized in that described driving control unit is made up of hardware and software two parts, hardware components comprises power driver module, detection and localization module, parameter input module, display part, trigger control module, communication module, power supply; Software section is an application software module.
3,, it is characterized in that described detection and localization module is single-chip microcomputer and photoelectrical coupler, shadow shield by the described accurate sampler of claim 2.
4, by the described accurate sampler of claim 2, it is characterized in that described parameter input module is a keyboard.
5, by the described accurate sampler of claim 2, it is characterized in that described display part is a charactron.
6, by the described accurate sampler of claim 2, it is characterized in that described trigger control module is a trigger button.
7, by the described accurate sampler of claim 2, it is characterized in that described communication module is a communication interface, directly or by network link to each other with computing machine.
8,, it is characterized in that described application software module comprises Control Software, traffic volume is calculated, shows control, read key, communications portion by the described accurate sampler of claim 2.
9, by the described accurate sampler of claim 3, it is characterized in that shadow shield be contained on the screw mandrel and plane valve rotating shaft on, photoelectrical coupler is fixed on peripheral relevant position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610037954 CN101004365A (en) | 2006-01-21 | 2006-01-21 | precision sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610037954 CN101004365A (en) | 2006-01-21 | 2006-01-21 | precision sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101004365A true CN101004365A (en) | 2007-07-25 |
Family
ID=38703650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610037954 Pending CN101004365A (en) | 2006-01-21 | 2006-01-21 | precision sampler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101004365A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101579646B (en) * | 2009-06-19 | 2012-07-25 | 杭州柯诺医疗科技有限公司 | Electronic pipettor origin calibrating method and special device |
| CN103063478A (en) * | 2013-01-21 | 2013-04-24 | 河北先河环保科技股份有限公司 | Automatic underwater petroleum pollutant sampling device |
| CN103149054A (en) * | 2013-01-31 | 2013-06-12 | 河海大学 | One-time layering sampling a plurality of unmixed groundwater samples device and method |
| CN103207099A (en) * | 2013-03-25 | 2013-07-17 | 苏州聚阳环保科技有限公司 | Stepping motor based automatic sampling system |
| CN103344459A (en) * | 2013-07-09 | 2013-10-09 | 杭州捷岛科学仪器有限公司 | Liquid sample injector |
| CN108190047A (en) * | 2017-11-27 | 2018-06-22 | 上海空间推进研究所 | Spacecraft liquid alkali metal feedway |
| CN111474003A (en) * | 2020-01-17 | 2020-07-31 | 杭州腾海科技有限公司 | Water quality flux monitoring buoy system |
-
2006
- 2006-01-21 CN CN 200610037954 patent/CN101004365A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101579646B (en) * | 2009-06-19 | 2012-07-25 | 杭州柯诺医疗科技有限公司 | Electronic pipettor origin calibrating method and special device |
| CN103063478A (en) * | 2013-01-21 | 2013-04-24 | 河北先河环保科技股份有限公司 | Automatic underwater petroleum pollutant sampling device |
| CN103063478B (en) * | 2013-01-21 | 2015-05-06 | 河北先河环保科技股份有限公司 | Automatic underwater petroleum pollutant sampling device |
| CN103149054A (en) * | 2013-01-31 | 2013-06-12 | 河海大学 | One-time layering sampling a plurality of unmixed groundwater samples device and method |
| CN103207099A (en) * | 2013-03-25 | 2013-07-17 | 苏州聚阳环保科技有限公司 | Stepping motor based automatic sampling system |
| CN103344459A (en) * | 2013-07-09 | 2013-10-09 | 杭州捷岛科学仪器有限公司 | Liquid sample injector |
| CN108190047A (en) * | 2017-11-27 | 2018-06-22 | 上海空间推进研究所 | Spacecraft liquid alkali metal feedway |
| CN111474003A (en) * | 2020-01-17 | 2020-07-31 | 杭州腾海科技有限公司 | Water quality flux monitoring buoy system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101004365A (en) | precision sampler | |
| CN100537035C (en) | Multichannel electronic liquor-transferring system with standard signal interface | |
| CN111830267A (en) | Pretreatment system for vaginal secretion sample detection | |
| CN111505202B (en) | Multifunctional diluting/titrating device | |
| CN1920526A (en) | Method and equipment for measuring fluid viscosity of capillary pipeline | |
| CN111610084B (en) | Automatic control device for heating and digesting detection of heavy metal in food | |
| CN209878403U (en) | Sampling needle position adjustable device for full-automatic dilution liquid distributor | |
| CN2447765Y (en) | Pipet | |
| CN201014986Y (en) | Control device for potentiometric titration reversing valve and burette | |
| CN200975954Y (en) | Automatic high-speed cutting machine | |
| CN209475729U (en) | A kind of full-service fluid processing workstation | |
| CN108722510A (en) | A kind of syringe pump | |
| CN218501949U (en) | Adjustable printing ink batching device | |
| CN209979668U (en) | Liquid detection sample introduction instrument | |
| CN107672140B (en) | It is a kind of can automatic material taking screw extruder | |
| CN220084859U (en) | Dry powder plastering mortar moisture detection device | |
| CN108427149A (en) | A kind of automatic rainfall prover and its application method | |
| CN216484841U (en) | Micro-liquid titration device | |
| CN220633976U (en) | Chemical reagent agitating unit | |
| CN220861907U (en) | AB glue double-component precise servo glue pushing machine | |
| CN218795436U (en) | Sample reagent mixing device | |
| CN217198766U (en) | Traditional chinese medicine paste filling equipment | |
| CN215114621U (en) | Portable automatic detection equipment convenient to carry and equipment | |
| CN220990479U (en) | Injection production equipment | |
| CN216594340U (en) | Sampling device for sewage treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |