CN111879955B - Automatic sample injector - Google Patents
Automatic sample injector Download PDFInfo
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- CN111879955B CN111879955B CN202010749746.8A CN202010749746A CN111879955B CN 111879955 B CN111879955 B CN 111879955B CN 202010749746 A CN202010749746 A CN 202010749746A CN 111879955 B CN111879955 B CN 111879955B
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- sample
- slide rail
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
Abstract
The invention belongs to the technical field of analysis and detection, and relates to an automatic sample injector, which comprises a sample injection part, a conveying part, a positioning detection part, a sample table provided with a plurality of sample containers, and a control part connected with the sample injection part, the conveying part and the positioning detection part; the sample introduction part is fixed on the conveying part, and the conveying part is used for conveying the sample introduction part to a specified position of the sample table; the positioning detection part arranged below the sample injection part is used for detecting whether a sample container exists at a designated position, if so, the control part controls the sample injection part to inject samples, and if not, the control part outputs an operation stopping instruction. The automatic sample feeding device can automatically judge whether the conveying position is accurate and whether a sample container exists in each position in the sample table, avoids sample feeding failure, can continuously feed samples from any position without repeating the sample feeding, and saves time cost. The control part can obtain the instrument signal and operate when the instrument is converted into a ready state, so that the success rate of analysis is further improved.
Description
Technical Field
The invention relates to an automatic sample injector, and belongs to the technical field of analysis and detection.
Background
With the continuous development of the technology, the automatic sample injector has become a standard for analytical and detection instruments because of the characteristics of continuous automatic sample injection, unattended operation and improvement of working efficiency. Common sample injectors are mainly disc type and three-axis gantry type. Although the sample injector can be suitable for liquid sample injection, gas sample injection cannot be realized through the expansion piece, and when the moving position deviates, the sample injector cannot detect and stop sample injection in time, so that the sample injector which is applied to gas and can detect whether the position is correct or not and whether the sample storage exists or not needs to be designed.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide an automatic sample injector, which can automatically determine whether a sample container exists at each position in a sample stage of a transport unit, thereby avoiding sample injection failure, and can continue sample injection from any position without repeating the sample injection, thereby saving time and cost.
In order to achieve the purpose, the invention provides an automatic sample injector, which comprises a sample injection part, a conveying part, a positioning detection part, a sample table and a control part, wherein the sample table is provided with a plurality of sample containers, and the control part is connected with the sample injection part, the conveying part and the positioning detection part; the sample introduction part is fixed on the conveying part, and the conveying part is used for conveying the sample introduction part to a specified position of the sample table; the positioning detection part arranged below the sample injection part is used for detecting whether a sample container exists at a designated position, if so, the control part controls the sample injection part to inject samples, and if not, the control part outputs an operation stopping instruction.
Further, the conveying part comprises first slide rails arranged on two sides of the sample table, the two sides of the sample table are parallel to each other, a first sliding table is arranged on the first slide rail, a second slide rail is arranged on the first sliding table, a second sliding table is arranged on the second slide rail, the sliding direction of the second sliding table is perpendicular to that of the first sliding table, a third slide rail is arranged on the second sliding table, a third sliding table is arranged on the third slide rail, the third sliding table slides in the vertical direction, the sample injection part is fixed on the third sliding table, and the positioning detection part is fixed at the bottom of the third slide rail.
Furthermore, the sample introduction part is fixed on the third sliding table through a fixing part, a first through hole is formed in the fixing part, the sample introduction part comprises a pressing cap joint and a sample introduction needle, the pressing cap joint is fixed on the fixing part through the first through hole, and the sample introduction needle is fixed on the pressing cap joint.
Furthermore, all be equipped with position finding sensor and grating chi on first slip table and the second slip table, position finding sensor can read the scale on the grating chi to the position of first slip table and second slip table is fed back in real time to the controller.
Further, the location detection portion comprises a sensor, a bottle blocking piece fixed to the bottom of the third sliding rail and a location component matched with the bottle blocking piece for use, and the bottle blocking piece comprises a first portion used for containing the location component and a second portion used for containing the sensor.
Furthermore, the position measuring component comprises a position measuring rod, one end of the position measuring rod penetrates through the fixing piece, the other end of the position measuring rod penetrates through the first part of the bottle blocking piece, a mark corresponding to the top height of the sample container is arranged on the position measuring rod, and if the position of the sample container is correct, the sensor reads the mark of the position measuring component and transmits the mark to the control part; if the sample container does not exist or the position of the sample container deviates, the mark is lower or higher than the position of the sensor, so that the sensor cannot read the mark, and whether the position of the sample container is correct or not is judged.
Further, the position measuring rod is of an L-shaped structure and comprises a vertical rod and a horizontal rod, one end of the vertical rod is connected with one end of the horizontal rod, the vertical rod penetrates through the second part of the bottle blocking piece, the other end of the horizontal rod is provided with a hollow cylindrical piece, the hollow cylindrical piece is installed in a second through hole of the first part of the bottle blocking piece, and the mark is arranged on the vertical rod.
Further, with the first part that keeps off the bottle spare as the boundary, establish in the upper portion of hollow cylinder spare and protect the needle tubing, the cover is equipped with the elastic component on protecting the outer wall of needle tubing, establishes the contact in the hollow cylinder's the lower part, this contact passes through threaded connection with hollow cylinder spare, this contact preferred scheme is the lid shape, and a round hole is left in the centre and can be supplied the injection needle to pass through, and this contact internal diameter is a bit more than sample storage ware bottle lid external diameter, and this contact secondary preferred scheme is the drum shape, and the external diameter slightly is less than sample storage ware bottle lid centre bore external diameter.
Furthermore, the first part of the bottle blocking piece is used as a boundary, the second part of the bottle blocking piece is higher than the first part of the bottle blocking piece, the second part of the bottle blocking piece comprises a groove and a third through hole, the groove is used for placing a sensor, and the third through hole is used for enabling a vertical rod of the position measuring rod to pass through.
Further, the sample container is uniformly placed on the sample table through the sample plate, the sample table is provided with a positioning pin and a contact switch, the positioning pin is used for fixing the sample plate, the contact switch detects the type of the sample plate, and when the contact switch is triggered, the sample injector starts to work to select corresponding operation parameters.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the controller controls the movement of the three sliding tables, the sensors of the first sliding table and the second sliding table are responsible for detecting the positions of the two shafts, and the position measuring sensor of the third sliding table can realize the position deviation and the bottle-free detection of sample bottles so as to prevent errors caused by the loss of steps of a stepping motor, the abrasion of a screw rod and the like.
2. The automatic sample injector is programmable and can independently control the sample injector.
3. The automatic sample injector has an initial function at any position, and is convenient for continuous sample injection after interruption; the automatic sample injector can be communicated with an analysis instrument, and can realize sample injection at regular intervals and continuous automatic sample injection by instrument signal feedback.
4. The automatic sample injector can be adapted to various sample trays, automatically identify the preset type, and also can be customized according to the requirement.
Drawings
FIG. 1 is a schematic diagram of an autosampler according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a third slider according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a sample injection part according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a limit sensor and a grating scale of the auto sampler according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a positioning assembly according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a contact structure according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating the position of the contact head and the sample reservoir in accordance with one embodiment of the present invention.
Reference numerals:
1-a sample reservoir; 2-a sample stage; 3-sample tray; 4-positioning pins; 5-a contact switch; 6-a first slide rail; 7-a first slipway; 8-a second slide rail; 9-a second sliding table; 10-a third slide rail; 11-a third slide table; 12-a grating ruler; 13-a position finding sensor; 14-a sample injection needle; 15-pressing the cap joint; 16-a fixing member; 17-a bottle blocking member; 18-a sensor; 19-a position measuring rod; 20-hollow cylindrical member; 21-needle protecting tube; 22-an elastic member; 23-a contact; 24-display panel.
Detailed Description
The present invention is described in detail by way of specific embodiments in order to better understand the technical direction of the present invention for those skilled in the art. It should be understood, however, that the detailed description is provided for a better understanding of the invention only and that they should not be taken as limiting the invention. In describing the present invention, it is to be understood that the terminology used is for the purpose of description only and is not intended to be indicative or implied of relative importance.
The embodiment provides an automatic sample injector, as shown in fig. 1-3, which includes a sample injection part, a conveying part, a positioning detection part, a sample stage 2 on which a plurality of sample containers 1 are placed, and a control part connected with the sample injection part, the conveying part and the positioning detection part; the sample introduction part is fixed on the conveying part, and the conveying part is used for conveying the sample introduction part to the specified position of the sample table 2; the positioning detection part arranged below the sample injection part is used for detecting whether the sample container 1 exists at the designated position, if so, the control part controls the sample injection part to inject the sample, and if not, the control part outputs an operation stopping instruction.
The sample container 1 is uniformly placed on the sample table 2 through the sample plate 3, the sample table 2 is provided with a positioning pin 4 and a contact switch 5, the positioning pin 4 is used for fixing the sample plate 3, and a signal of the contact switch 5 is used for identifying the type of the sample plate 3. In this embodiment, the two positioning pins 4 on the sample stage 2 are preferably selected, the shape of the positioning pins 4 is preferably tapered, and the positioning pins 4 can be better fitted with the concave holes at the bottom of the sample tray 3, so as to realize the positioning function. The size and dimension of the sample plate 3 and the size of the hole of the sample container 1 can be designed according to the needs, but the sample plate 3 with the same height at the top of the sample container 1 must be ensured, because it is easier to judge whether the sample container 1 exists at a certain position under the condition that the height of the sample container 1 is the same, namely, the positioning detection part still does not touch the top of the sample container 1 when being descended to the height of the sample container 1, the position can be determined to have no sample container 1, and the height of the positioning detection part does not need to be further reduced. The contact switch 5 corresponds to a prepared hole of the sample plate 3 for judging the type of the sample plate 3, and further, the contact switch 5 may be provided in plural.
The conveying part comprises first sliding rails 6 arranged on two sides of the sample table 2, which are parallel to each other, a first sliding table 7 is arranged on the first sliding rail 6, a second sliding rail 8 is arranged on the first sliding table 7, a second sliding table 9 is arranged on the second sliding rail 8, the sliding direction of the second sliding table 9 is perpendicular to that of the first sliding table 7, a third sliding rail 10 is arranged on the second sliding table 9, a third sliding table 11 is arranged on the third sliding rail 10, the third sliding table 11 slides in the vertical direction, the sample injection part is fixed on the third sliding table 11, and the positioning detection part is fixed at the bottom of the third sliding rail 10. The position of the third slide table 11 connected to the sample injection part is determined by the control part, generally, in this embodiment, after the device is powered on for self-test, the control part controls the conveying part to convey the sample injection part to the initial position, and other sample injection positions are determined according to the program input parameters. Both ends of first slide rail 6, second slide rail 8 and third slide rail 10 all are equipped with spacing sensor to the range of movement of first slip table 7, second slip table 9 of control and third slip table 11. As shown in fig. 2 and 4, the position measuring sensor 13 of the first slide rail 6 is disposed on the inner side of the first sliding platform 7, and the grating ruler 12 corresponding to the first slide rail 6 is disposed on the side surface of the sample platform 2 parallel to the first slide rail 6. The position measuring sensor 13 of the second slide rail 8 is arranged at the bottom of the fixed position of the second sliding table 9 and the second slide rail 8, and the grating ruler 12 of the second slide rail 8 is arranged in parallel with the bottom side of the second slide rail 8. The position measuring sensor 13 feeds back the positions of the first sliding table 7 and the second sliding table 9 to the controller in real time through the hole on the grating ruler 12, so that the controller can conveniently determine whether to continuously sample. It should be noted here that the grating scale 12 corresponds to the type of the sample tray 3, that is, the grating scale 12 for selecting different types of sample trays 3 also needs to be replaced accordingly.
The sample introduction part comprises a pressing cap joint 15 and a sample introduction needle 14 which are sequentially arranged from top to bottom, and the sample introduction needle 14 is fixed through the pressing cap joint 15. The sample introduction part is fixed on the third sliding table 11 through a fixing part 16, a first through hole is formed in the fixing part 16, and the pressing cap joint 15 is fixed on the fixing part 16 through the through hole.
The positioning detection part comprises a bottle blocking part 17 fixed at the bottom of the third slide rail 10 and a positioning component matched with the bottle blocking part. When the sample injection part moves downwards along with the third sliding table 11, the bottle blocking member 17 does not move downwards along with the third sliding table 11 and remains stationary relatively. The stopper 17 comprises two parts, a first part for housing the sensor 18 and a second part for housing the position-finding assembly.
As shown in fig. 5, the position finding assembly comprises a position finding rod 19, one end of the position finding rod 19 passes through the fixing member 16, the other end is mounted on the first portion of the bottle blocking member 17, the position finding rod 19 is provided with a mark corresponding to the height of the top of the sample container 1, and if the position of the sample container 1 is correct, the sensor 18 reads the mark of the position finding assembly and transmits the mark to the control part; if the sample container 1 is not present or is displaced, it will be lower or higher than the position of the sensor 18, so that the sensor 18 cannot read the mark, thereby determining whether the position of the sample container 1 is correct. The mark can be a mark line, a mark hole, a scale and the like. In this embodiment, the aperture is used as a mark, and the specific shape thereof is shown in fig. 5.
The position measuring rod 19 is of an L-shaped structure and comprises a vertical rod and a horizontal rod, one end of the vertical rod is connected with one end of the horizontal rod, the other end of the vertical rod is connected with a third sliding table, the vertical rod penetrates through the second part of the bottle blocking part 17, the other end of the horizontal rod is provided with a hollow cylindrical part 20, the hollow cylindrical part 20 is arranged in a second through hole of the first part of the bottle blocking part 17, and the mark is arranged on the vertical rod.
The first part of the bottle blocking part 17 is used as a boundary, the needle protecting tube 21 is arranged in the upper part of the hollow cylindrical part 20, the elastic part 22 is sleeved on the outer wall of the needle protecting tube 21, the contact head 23 is arranged in the lower part of the hollow cylindrical part 20, as shown in figures 6 and 7, the contact head 23 is in threaded connection with the hollow cylindrical part 20, the contact head 23 is preferably in a cover shape, a round hole is reserved in the middle for a sample injection needle to pass through, the inner diameter of the contact head 23 is slightly larger than the outer diameter of a bottle cap of the sample container, the contact head 23 is in a cylindrical shape for the second time, and the outer diameter is slightly smaller than the outer diameter of a central hole of the bottle cap of the sample container. The sample injection needle 14 passes through the needle guard 21 and the contact head 23 in sequence during the lowering process and enters the sample container 1 for sampling. The needle guard 21 is used for protecting the needle 14 from being broken easily, and the elastic element 22 is used for maintaining the height of the needle guard 21, so that the space can be saved in time when the needle 14 is used for sampling. The second part of the bottle stop 17 is higher than the first part of the bottle stop 17, the second part of the bottle stop 17 comprises a recess for placing the sensor 18 and a third through hole for passing the vertical pole of the position finder 19.
It should be noted that in the present embodiment, the grating scale 12, the position measuring component, and the sensor 18 are taken as examples for explanation, and actually, the grating scale 12 and the position measuring component may be any devices having a scale display function, and the sensor 18 may also be any devices capable of reading scales, such as an infrared sensor. The scales can be pores or convex marked lines, and the sizes and depths of the pores and the marked lines can be adjusted according to actual conditions. For reading convenience, the sensor 18 is disposed at a position perpendicular to the position finder 19.
The controller in this embodiment is preferably connected to the display panel 24, and a user can monitor the sample injection process in real time through the display panel 24, adjust the sample injection parameters, or start and stop the sample injector.
The sample injector can extract a gaseous sample, can detect whether the sample container exists or deviates, ensures the accuracy of sample injection, and avoids sample injection errors caused by the absence of the sample container; when the device is restarted, the operation is simple and convenient, and the operation is simple and convenient; the controller can be communicated with the analyzer through a signal line, and the sample injection operation is carried out when the analyzer is switched to the ready state, so that the success rate of sample injection is further ensured.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (5)
1. An automatic sample injector is characterized by comprising a sample injection part, a conveying part, a positioning detection part, a sample table for placing a plurality of sample containers, and a control part connected with the sample injection part, the conveying part and the positioning detection part;
the sample introduction part is fixed on the conveying part, and the conveying part is used for conveying the sample introduction part to the specified position of the sample table;
the positioning detection part is arranged below the sample injection part and is used for detecting whether a sample container exists at the designated position, if so, the control part controls the sample injection part to inject samples, and if not, the control part outputs an operation stopping instruction;
the positioning detection part comprises a sensor, a bottle blocking piece and a positioning assembly matched with the bottle blocking piece, wherein the bottle blocking piece comprises a first part for accommodating the positioning assembly and a second part for accommodating the sensor; the position measuring component comprises a position measuring rod, a mark corresponding to the top height of the sample container is arranged on the position measuring rod, the mark is marked with a mark line, a mark hole or a scale, and if the position measuring rod is correctly contacted with the sample container, the sensor reads the mark of the position measuring component and transmits the mark to the control part; if the sample container does not exist or the position of the sample container deviates, the mark is lower or higher than the position of the sensor, so that the sensor cannot read the mark, and whether the position of the sample container is correct is judged;
the position measuring rod is of an L-shaped structure and comprises a vertical rod and a horizontal rod, one end of the vertical rod is connected with one end of the horizontal rod, the vertical rod penetrates through the second part of the bottle blocking piece, the other end of the horizontal rod is provided with a hollow cylindrical piece, the hollow cylindrical piece is installed in a second through hole of the first part of the bottle blocking piece, and the mark is arranged on the vertical rod;
the first part of the bottle blocking piece is used as a boundary, the second part of the bottle blocking piece is higher than the first part of the sensor, the second part of the bottle blocking piece comprises a groove, the groove is used for placing the sensor, and a third through hole is arranged in the sensor and used for enabling a vertical rod of the position measuring rod to pass through;
with the first part of fender bottle spare is the boundary, establish in the upper portion of hollow cylinder spare and protect the needle tubing, the cover is equipped with the elastic component on protecting the outer wall of needle tubing, the sub-unit connection contact head of hollow cylinder spare, the contact head with hollow cylinder spare passes through threaded connection, the shape of contact head is lid form or cylindric, leave a round hole in the middle of the contact head and supply to advance the appearance needle and pass through, work as when the contact head is lid form, the contact head internal diameter is greater than sample container bottle lid external diameter, works as when the contact head is cylindric, the external diameter of contact head is less than sample container bottle lid centre bore external diameter.
2. The automatic sample injector of claim 1, wherein the conveying unit comprises first slide rails disposed on two sides of the sample stage parallel to each other, a first slide rail is disposed on the first slide rail, a second slide rail is disposed on the second slide rail, a sliding direction of the second slide rail is perpendicular to a sliding direction of the first slide rail, a third slide rail is disposed on the second slide rail, a third slide rail is disposed on the third slide rail, the third slide rail slides in a vertical direction, the sample injection unit is fixed on the third slide rail, and the positioning detection unit is fixed at a bottom of the third slide rail.
3. The automatic sample injector of claim 2, wherein the first sliding table and the second sliding table are respectively provided with a position measuring sensor and a grating ruler, and the position measuring sensors can read scales on the grating ruler and feed back the positions of the first sliding table and the second sliding table to the controller in real time.
4. The autosampler of claim 2, wherein the sample injection part is fixed on the third sliding table through a fixing member, the fixing member is provided with a first through hole, the sample injection part comprises a press cap connector and a sample injection needle, the press cap connector is fixed on the fixing member through the first through hole, and the sample injection needle is fixed on the press cap connector.
5. The autosampler of any of claims 1 to 4, wherein said sample reservoirs are uniformly placed on said sample platform by sample trays, said platform having alignment pins for holding said sample trays and a contact switch for detecting the type of said sample trays, said sample trays being activated to select corresponding operating parameters when said contact switch is activated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010749746.8A CN111879955B (en) | 2020-07-30 | 2020-07-30 | Automatic sample injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010749746.8A CN111879955B (en) | 2020-07-30 | 2020-07-30 | Automatic sample injector |
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| CN111879955A CN111879955A (en) | 2020-11-03 |
| CN111879955B true CN111879955B (en) | 2022-04-19 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114624315A (en) * | 2020-12-12 | 2022-06-14 | 广州禾信仪器股份有限公司 | Continuous mass spectrum sampling device and mass spectrum detection equipment |
| CN113640506B (en) * | 2021-08-03 | 2023-10-20 | 安徽大千生物工程有限公司 | Novel sample bin |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3504799A (en) * | 1968-04-02 | 1970-04-07 | Beckman Instruments Inc | Sample injector |
| CN102680722B (en) * | 2012-05-03 | 2013-11-06 | 苏州生物医学工程技术研究所 | Automatic sample introduction device |
| CN204269661U (en) * | 2014-10-28 | 2015-04-15 | 利多(香港)有限公司 | The sampling apparatus of full-automatic Hematometer |
| CN205861709U (en) * | 2016-06-29 | 2017-01-04 | 中山生物工程有限公司 | A kind of sampling device of blood type analytical instrument |
| CN107643355A (en) * | 2016-07-20 | 2018-01-30 | 北京普源精电科技有限公司 | The pressure bottle component of automatic sampler |
| CN206515304U (en) * | 2016-12-21 | 2017-09-22 | 浙江福立分析仪器股份有限公司 | A kind of automatic sampler |
| CN107328950B (en) * | 2017-08-22 | 2023-06-27 | 重庆博奥新景医学科技有限公司 | Automatic sample injection system for lifting and cleaning sample tube in cell analysis |
| CN107658202A (en) * | 2017-10-01 | 2018-02-02 | 江苏天瑞仪器股份有限公司 | A kind of icp mses automatic sampler |
| CN209784387U (en) * | 2019-03-06 | 2019-12-13 | 上海思达分析仪器有限责任公司 | Sample injector device for automatically detecting sample bottles |
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