CN109856296B - Gas chromatograph capable of automatically selecting detection sample - Google Patents
Gas chromatograph capable of automatically selecting detection sample Download PDFInfo
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- CN109856296B CN109856296B CN201910135609.2A CN201910135609A CN109856296B CN 109856296 B CN109856296 B CN 109856296B CN 201910135609 A CN201910135609 A CN 201910135609A CN 109856296 B CN109856296 B CN 109856296B
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Abstract
The invention discloses a gas chromatograph capable of automatically selecting a detection sample, and particularly relates to the field of laboratory instruments, wherein the gas chromatograph comprises a body, wherein the body comprises a selection sample injection device and a sample injection needle; the selective sample feeding device comprises a fixing ring, a hollow sample feeding bottle moving channel with an opening at the upper end, a push rod, an elastic sheet, a fixed rod and a pressing block which is slidably arranged on the fixed rod; one end of the sample inlet bottle moving channel is fixedly connected with the fixing ring, and the other end of the sample inlet bottle moving channel is fixedly connected with the fixing rod; one end of the push rod is hinged with the side wall of the pressing block, and the other end of the push rod is in contact with the bottle body of the sampling bottle; one end of the elastic sheet is fixedly arranged on the side wall of the fixed rod, and the other end of the elastic sheet is contacted with the bottom of the pressing block; the number of the pressing blocks corresponds to the number of the sample feeding bottle moving channels, the pushing rods and the elastic pieces. The invention has the advantage that the laboratory staff can select the sample for detection.
Description
Technical Field
The invention relates to the field of laboratory instruments, in particular to a gas chromatograph capable of automatically selecting and detecting samples.
Background
The gas chromatograph is a chromatographic analysis device using gas as a mobile phase. The principle is mainly to realize the separation of the mixture by utilizing the differences of the boiling point, the polarity and the adsorption property of the substances. When a sample to be analyzed is gasified in the gasification chamber, the sample can be carried into the chromatographic column by inert gas, the chromatographic column contains a stationary phase in a liquid or solid state, and all components in the sample tend to form distribution or adsorption equilibrium between the mobile phase and the stationary phase. With the flowing of the carrier gas, the sample components are repeatedly distributed or adsorbed/desorbed in motion for many times, and the components with high distribution concentration in the carrier gas flow out of the chromatographic column firstly, and the components with high distribution concentration in the stationary phase flow out after being distributed. The components exit the column and enter a detector for determination.
Generally, a gas chromatograph is used for analyzing organic matters which are thermally stable in soil and have a boiling point of not more than 500 ℃, such as volatile organic matters, organic chlorine, organic phosphorus, polycyclic aromatic hydrocarbons, phthalate esters and the like, and has the advantages of rapidness, effectiveness, high sensitivity and the like.
However, the sampling system of the conventional gas chromatograph often needs to operate according to preset complex instructions in the process of grabbing the sampling bottle, and the sample can only be grabbed and detected in sequence according to the number during detection, and the detection sequence cannot be adjusted temporarily according to the actual needs of experimenters, which is not beneficial to rapid determination of the sample. Meanwhile, the traditional sample introduction system is provided with a bearing plate for placing a sample introduction bottle fixing frame, so that the whole volume of the sample introduction system is too large, too much laboratory space is occupied, and the sample introduction system is not beneficial to carrying instruments.
Disclosure of Invention
The invention provides a gas chromatograph capable of automatically selecting a detection sample, which has the advantage that an experimenter can automatically select the sample for detection.
In order to achieve the purpose, the invention provides the following technical scheme:
a gas chromatograph capable of automatically selecting detection samples comprises a machine body, wherein the machine body comprises a selection sample injection device and a sample injection needle; the selective sample feeding device comprises a fixing ring, a hollow sample feeding bottle moving channel with an opening at the upper end, a push rod, an elastic sheet, a fixed rod and a pressing block which is slidably arranged on the fixed rod; one end of the sample inlet bottle moving channel is fixedly connected with the fixing ring, and the other end of the sample inlet bottle moving channel is fixedly connected with the fixing rod; one end of the push rod is hinged with the side wall of the pressing block, and the other end of the push rod is in contact with the bottle body of the sampling bottle; one end of the elastic sheet is fixedly arranged on the side wall of the fixed rod, and the other end of the elastic sheet is contacted with the bottom of the pressing block; the number of the pressing blocks corresponds to the number of the sample feeding bottle moving channels, the pushing rods and the elastic pieces.
Preferably, the selective sampling device further comprises an elastic piece, one end of the elastic piece is fixed with one end of the sampling bottle moving channel, which is back to the fixing ring, and the other end of the elastic piece is fixed with one end of the elastic piece, which is back to the pressing block.
Preferably, one end of the sample bottle moving channel, which is back to the fixed rod, is provided with an arc-shaped blocking wall for preventing the sample bottle from falling.
Preferably, when the sample solution in the sample bottle is not selected for on-machine analysis, the position of the sample bottle is a first position, and when the sample solution in the sample bottle is selected for on-machine analysis, the position of the sample bottle is a second position, and the sample bottle moving channel is provided with a positioning sheet for facilitating a technician to place the sample bottle in the first position.
Preferably, the sampling device further comprises an arc-shaped push sheet attached to the bottle body of the sampling bottle, the arc-shaped push sheet is hinged to one end, back to the press block, of the push rod, and a through groove matched with the movement path of the push rod is formed in the middle of the positioning sheet.
Preferably, the upper end of the fixed rod is provided with a sliding limiting groove, and correspondingly, each pressing block is provided with a sliding block matched with the sliding limiting groove.
Preferably, the upper end of the fixing rod is provided with a limiting head for preventing the pressing block from coming off, and the limiting head is fixed with the fixing rod in a threaded manner.
Preferably, the machine body further comprises a servo motor for driving the fixing rod to rotate, and an output end of the servo motor is fixed to the bottom end of the fixing rod.
Preferably, the fixing ring is fixedly provided with a cylinder body for placing and storing a cleaning solution bottle, and the number of the cylinder bodies is matched with the number of the sample injection bottle moving channels.
Preferably, one end of the sample bottle moving channel, which is opposite to the fixing ring, is provided with a plurality of arc-shaped limiting pieces, and a gap for the movement of the push rod is reserved between every two adjacent arc-shaped limiting pieces.
The invention has the beneficial effects that:
the experimenter can place the bottle of advancing in advance on advancing a kind bottle moving channel, when the experimenter needs to examine corresponding sample, the accessible is pressed and is advanced the corresponding briquetting of a kind bottle moving channel for the catch bar tends to the horizontality by original tilt state gradually. Meanwhile, the sample injection bottle can move along the sample injection bottle moving channel due to the thrust of the push rod until the sample injection bottle moves to the position right below the sample injection needle. After the operation is finished, the pressing block can be restored to the original position under the elastic action of the elastic sheet. Through the operation, the experimenter can select the corresponding sample to detect according to actual needs, so that the detection process is more flexible, and the problem that the detection time is prolonged because the traditional gas chromatograph needs to implement multiple instructions when detecting the sample is solved.
Drawings
FIG. 1 is a schematic structural diagram of a gas chromatograph capable of self-selecting a sample for detection according to the present embodiment;
FIG. 2 is a schematic structural diagram of a sample injection device selected in this embodiment;
FIG. 3 is a schematic cross-sectional view of a sample injection device according to the present embodiment;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic structural diagram (infinite head) of a sample injection device selected in this embodiment;
fig. 6 is an enlarged view of a portion B in fig. 5.
Reference numerals: 1. fuselage body, 11, advance kind needle, 21, servo motor, 210, output, 22, solid fixed ring, 23, advance kind bottle removal passageway, 230, arc fender wall, 231, spacer, 232, arc push jack, 233, catch bar, 24, elastic component, 25, dead lever, 250, the spacing piece of arc, 26, elastic piece, 27, briquetting, 270, the spacing groove that slides, 28, spacing head, 29, barrel.
Detailed Description
As shown in fig. 1 to 6, a gas chromatograph capable of automatically selecting a detection sample is characterized by comprising a body 1, wherein the body 1 comprises a selection sample injection device and a sample injection needle 11; the sample selection device comprises a fixing ring 22, a hollow sample bottle moving channel 23 with an opening at the upper end, a push rod 233 arranged obliquely, an elastic sheet 26, a fixing rod 25 and a pressing block 27 arranged on the fixing rod 25 in a sliding manner; one end of the sample bottle moving channel 23 is fixedly connected with the fixing ring 22, and the other end is fixedly connected with the fixing rod 25; one end of the push rod 233 is hinged with the side wall of the pressing block 27, and the other end is contacted with the body of the sampling bottle; one end of the elastic sheet 26 is fixedly arranged on the side wall of the fixed rod 25, and the other end of the elastic sheet is contacted with the bottom of the pressing block 27; the number of the pressing blocks 27 corresponds to the number of the sample bottle moving channel 23, the pushing rods 233 and the elastic pieces 26.
The experimenter can place the sampling bottle on sampling bottle moving channel 23 in advance, and when the experimenter needs to detect corresponding samples, the experimenter can press pressing block 27 corresponding to sampling bottle moving channel 23, so that push rod 233 gradually tends to the horizontal state from the original inclined state. Meanwhile, the sample bottle can move along the sample bottle moving channel 23 by the pushing force of the pushing rod 233 until the sample bottle moves to the position right below the sample needle 11. After the above operation is completed, the pressing piece 27 is returned to its original position by the elastic force of the elastic piece 26. Through the operation, the experimenter can select the corresponding sample to detect according to actual needs, so that the detection process is more flexible, and the problem that the detection time is prolonged because the traditional gas chromatograph needs to implement multiple instructions when detecting the sample is solved.
In this embodiment, the pushing rod 233 is disposed obliquely, and the plane where the pushing rod 233 and the pressing block 27 are connected is higher than the plane where the pushing rod 233 contacts the sample bottle. When the experimenter presses the pressing block 27, the experimenter only needs to drive the pushing rod 233 to the position right below the sample injection needle 11.
As shown in fig. 4, the selective sample feeding device further includes an elastic member 24, one end of the elastic member 24 is fixed to one end of the vial moving channel 23 facing away from the fixing ring 22, and the other end is fixed to one end of the elastic sheet 26 facing away from the pressing block 27. The elastic member 24 is provided to prevent metal fatigue of the elastic sheet made of a metal material caused by pressing the pressing block 27 several times by an experimenter.
As shown in fig. 2, an end of the sample bottle moving channel 23 facing away from the fixing rod 25 is provided with an arc-shaped blocking wall 230 for preventing the sample bottle from falling. The arc-shaped blocking wall 230 can prevent the sample injection bottle from accidentally dropping, and can play a role in positioning. When the push rod 233 pushes the sample injection bottle to move, it only needs to push the sample injection bottle to the arc-shaped blocking wall 230, and at this time, the arc-shaped blocking wall 230 can be preset to be just below the sample injection needle 11.
As shown in fig. 2, when the sample solution in the sample bottle is not selected for the machine analysis, the position of the sample bottle is a first position, and when the sample solution in the sample bottle is selected for the machine analysis, the position of the sample bottle is a second position, and the sample bottle moving channel 23 is provided with a positioning piece 231 for facilitating a technician to place the sample bottle in the first position. The positioning tab 231 may further facilitate placement of a sample vial by a technician.
As shown in fig. 2, the sample feeding device further includes an arc-shaped pushing piece 232 attached to the body of the sample feeding bottle, the arc-shaped pushing piece 232 is hinged to one end of the pushing rod 233 opposite to the pressing block 27, and a through groove adapted to the movement path of the pushing rod 233 is formed in the middle of the positioning piece 231. Because the push rod 233 slides to different degrees when contacting with the body of the sampling bottle, the end of the push rod 233 is hinged with the arc-shaped push sheet 232, so that the pushing force of the push rod 233 is uniformly distributed on the body of the sampling bottle. Therefore, the sampling bottle cannot topple over or slip in the moving process.
As shown in fig. 6, the upper end of the fixing rod 25 is provided with a sliding limiting groove 270, and correspondingly, each pressing block 27 is provided with a sliding block adapted to the sliding limiting groove 270. The cross section of the sliding limiting groove 270 can be designed to be an i shape, which is equivalent to that the press block 27 can only move in the vertical direction and cannot move in the horizontal direction through the sliding fit of the sliding block and the sliding limiting groove 270.
As shown in fig. 4, a stopper 28 for preventing the pressing piece 27 from coming off is provided at the upper end of the fixing rod 25, and the stopper 28 is screwed to the fixing rod 25.
In this embodiment, the main body 1 further includes a servo motor 21 for driving the fixing rod 25 to rotate, and an output end 210 of the servo motor 21 is fixed to the bottom end of the fixing rod 25. When the technician does not have a special choice for the sample, in order to facilitate the operation, the servo motor 21 drives the fixing rod 25 to rotate equally, so that the detection of the next sample is performed after the detection of the previous sample is completed.
As shown in FIG. 2, the fixing ring 22 is fixedly provided with cylinder bodies 29 for placing bottles for storing the cleaning solution, and the number of the cylinder bodies 29 is adapted to the number of the sample bottle moving channels 23.
As shown in fig. 6, one end of the sample bottle moving channel 23 facing away from the fixing ring 22 is provided with a plurality of arc-shaped limiting pieces 250, and a gap for the movement of the push rod 233 is left between two adjacent arc-shaped limiting pieces 250. When the push rod 233 moves in the gap, the push rod 233 is prevented from being dislocated or inclined, so that it can be moved in a vertical direction with certainty.
Claims (10)
1. The gas chromatograph capable of automatically selecting and detecting samples is characterized by comprising a machine body (1), wherein the machine body (1) comprises a selection sample injection device and a sample injection needle (11);
the selective sample feeding device comprises a fixing ring (22), a hollow sample feeding bottle moving channel (23) with an opening at the upper end, a pushing rod (233) which is obliquely arranged, an elastic sheet (26), a fixing rod (25) and a pressing block (27) which is slidably arranged on the fixing rod (25);
one end of the sample feeding bottle moving channel (23) is fixedly connected with the fixing ring (22), and the other end of the sample feeding bottle moving channel is fixedly connected with the fixing rod (25);
one end of the push rod (233) is hinged with the side wall of the pressing block (27), and the other end of the push rod is contacted with the body of the sampling bottle;
one end of the elastic piece (26) is fixedly arranged on the side wall of the fixed rod (25), and the other end of the elastic piece is contacted with the bottom of the pressing block (27);
the number of the pressing blocks (27) corresponds to the number of the sample feeding bottle moving channels (23), the pushing rods (233) and the elastic pieces (26);
wherein: the plane of the joint of the push rod (233) and the pressing block (27) is higher than the plane of the contact point of the push rod (233) and the sample feeding bottle.
2. The gas chromatograph capable of self-selecting sample detection according to claim 1, wherein the selective sampling device further comprises an elastic member (24), one end of the elastic member (24) is fixed to an end of the vial moving channel (23) facing away from the fixing ring (22), and the other end is fixed to an end of the elastic sheet (26) facing away from the pressing block (27).
3. The gas chromatograph capable of automatically and selectively detecting the sample according to claim 1, wherein an end of the sample bottle moving channel (23) facing away from the fixing rod (25) is provided with an arc-shaped blocking wall (230) for preventing the sample bottle from falling.
4. The gas chromatograph capable of automatically and selectively detecting the sample according to claim 1, wherein the sample bottle is located at one position when the sample solution in the sample bottle is not selected for the on-machine analysis, and the sample bottle is located at two positions when the sample solution in the sample bottle is selected for the on-machine analysis, and the sample bottle moving channel (23) is provided with a positioning piece (231) for facilitating a technician to place the sample bottle at the one position.
5. The gas chromatograph capable of automatically and selectively detecting the samples as claimed in claim 4, wherein the selective sampling device further comprises an arc-shaped push piece (232) attached to the body of the sampling bottle, the arc-shaped push piece (232) is hinged to one end of the push rod (233) facing away from the press block (27), and a through groove adapted to the movement path of the push rod (233) is formed in the middle of the positioning piece (231).
6. The gas chromatograph capable of automatically and selectively detecting the sample as claimed in claim 1, wherein the upper end of the fixing rod (25) is provided with a sliding limiting groove (270), and correspondingly, each pressing block (27) is provided with a sliding block adapted to the sliding limiting groove (270).
7. The gas chromatograph capable of self-selecting samples for testing according to claim 6, wherein the upper end of the fixing rod (25) is provided with a limiting head (28) for preventing the pressing block (27) from falling out, and the limiting head (28) is screwed with the fixing rod (25).
8. The gas chromatograph capable of self-selecting detection samples according to claim 1, wherein the body (1) further comprises a servo motor (21) for driving the fixing rod (25) to rotate, and an output end (210) of the servo motor (21) is fixed to a bottom end of the fixing rod (25).
9. The gas chromatograph capable of self-selecting detection samples according to claim 1, wherein the fixing ring (22) is fixedly provided with cylinder bodies (29) for placing bottles storing cleaning solution, and the number of the cylinder bodies (29) is adapted to the number of the sample bottle moving channels (23).
10. The gas chromatograph capable of automatically and selectively detecting the sample according to claim 1, wherein a plurality of arc-shaped limiting pieces (250) are arranged at one end of the sample inlet bottle moving channel (23) opposite to the fixing ring (22), and a gap for the movement of the push rod (233) is reserved between two adjacent arc-shaped limiting pieces (250).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910135609.2A CN109856296B (en) | 2019-02-25 | 2019-02-25 | Gas chromatograph capable of automatically selecting detection sample |
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| CN201910135609.2A CN109856296B (en) | 2019-02-25 | 2019-02-25 | Gas chromatograph capable of automatically selecting detection sample |
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| CN109856296B true CN109856296B (en) | 2021-01-15 |
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| CN112697991A (en) * | 2020-12-11 | 2021-04-23 | 浙江华标检测技术有限公司 | Detection equipment for volatile organic compounds in water |
| CN116429961B (en) * | 2023-06-13 | 2023-11-07 | 国网浙江省电力有限公司宁波供电公司 | Oil chromatographic analysis instrument and detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6057547B2 (en) * | 1978-11-20 | 1985-12-16 | 株式会社東芝 | automatic chemical analysis method |
| JP2002202316A (en) * | 2000-11-01 | 2002-07-19 | Jeol Ltd | Analyzing system and analyzing method |
| US6666100B1 (en) * | 2002-12-16 | 2003-12-23 | Merlin Instrument Company | Sample injector with interface-control lever |
| CN200950140Y (en) * | 2006-09-07 | 2007-09-19 | 李钢 | Sample feeder for measuring blood viscosity |
| JP5378859B2 (en) * | 2009-03-30 | 2013-12-25 | シスメックス株式会社 | Sample testing system |
| CN202093003U (en) * | 2011-06-21 | 2011-12-28 | 青岛盛瀚色谱技术有限公司 | Ion chromatography sample introduction device |
| US9630775B2 (en) * | 2014-03-28 | 2017-04-25 | Brooks Automation, Inc. | Sample selector |
| WO2016016109A2 (en) * | 2014-07-29 | 2016-02-04 | Joachim Gerstel | Arrangement for preparing a plurality of samples for an analytical method |
| CN104280289B (en) * | 2014-10-10 | 2017-02-22 | 中国科学院生态环境研究中心 | Adjustable sample positioning rack for nitrogen blowing instrument |
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