CN111381069A - Multi-position automatic sample introduction device - Google Patents
Multi-position automatic sample introduction device Download PDFInfo
- Publication number
- CN111381069A CN111381069A CN202010344906.0A CN202010344906A CN111381069A CN 111381069 A CN111381069 A CN 111381069A CN 202010344906 A CN202010344906 A CN 202010344906A CN 111381069 A CN111381069 A CN 111381069A
- Authority
- CN
- China
- Prior art keywords
- positioning
- plate
- fixed
- cylinder
- sampling
- 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.)
- Granted
Links
- 238000005070 sampling Methods 0.000 claims abstract description 90
- 238000003825 pressing Methods 0.000 claims abstract description 36
- 210000000078 claw Anatomy 0.000 claims abstract description 19
- 238000004458 analytical method Methods 0.000 claims abstract description 15
- 238000010926 purge Methods 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000002452 interceptive effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 31
- 239000005431 greenhouse gas Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004172 nitrogen cycle Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
- G01N35/1065—Multiple transfer devices
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a multi-position automatic sample introduction device, which comprises a fixed disk frame of the multi-position automatic sample introduction device, a rotary driving structure for driving the fixed disk frame to rotate, a plurality of clamping units of sampling injectors vertically clamped on fixed positions of the fixed disk frame one by one, and a sample introduction module positioned on an analysis position, wherein the sample introduction module comprises a dynamic gas interface structure, a sample introduction driving structure for driving a pressing plate to complete sample introduction, and a gas valve driving structure for driving three claws of a gas-tight valve to rotate so as to switch a switch-on position. The invention is automatically carried out, thereby avoiding the influence of the difference of manual operation, the non-uniformity of sample introduction time and the like on the stability of the test.
Description
Technical Field
The invention relates to the technical field of gas analysis, in particular to a multi-position automatic sample feeding device.
Background
Climate warming is currently a major global challenge, and IPCC reports a fifth evaluation that the most significant cause of global warming is a dramatic increase in the concentration of greenhouse gases in the atmosphere. It is reported that nearly 5% -20% CO is present in the atmosphere annually2、15％－30％CH4And 80% -90% N2All O is derived from soil, and as global climate continuously warms up, the degradation of permafrost, glacier melting and the like have great influence on the emission of greenhouse gases. In order to understand the generation mechanism of greenhouse gases and quantify the contribution rate and influence factors of soil and glacier greenhouse gases to atmospheric emission, the problem needs to be solved by means of isotope technology.
In recent years, various greenhouse gas analyzers such as TraceGas by IsoPrime, Cryoprep by SerCon, PreCon by Thermo, etc. have been introduced by foreign companies, and all of these devices need to be connected to a specific sample bottle for collecting a sample in order to perform isotope measurement on the collected gas sample. However, the volume and the weight of the special sample bottle are large, and the special sample bottle is particularly not suitable for being carried and sampled in the field environment of plateau areas; in addition, when the gas collected by the sample bottle is detected by an instrument, He gas is required to be blown to enter, so that the gas is diluted, the utilization rate of the sample is reduced, the enrichment time of the gas sample is prolonged, the required amount of the gas sample cannot be controlled by self, and the stability is influenced during manual operation.
In view of this, the "static box" sampling technique was used in the frozen circle scientific research, using 100ml plastic syringe style sampling tubes for sampling, as shown in figure 1, the injector type sampling tube comprises a sleeve 1, a piston pushing handle 2 and a switching connecting port arranged on an injection port at the front end of the sleeve 1, a fixed flange 7 is formed at the rear end of the sleeve 1, a rubber plug fixed at the front end of the piston pushing handle 2 is inserted into the sleeve 1, the rear end of the piston pushing handle 2 is a pressing plate 3, the switching connecting port comprises an airtight valve 4 fixed at the front end injection port, a front port 6 and a side port 5 respectively communicated with the airtight valve 4, the airtight valve 4 is provided with three claws, when the three claws are rotated, the front port 6 is selectively communicated with the side port 5 and the sleeve 1, the front port 6 is connected with the side port 5 to form one connection position, and the front port 6 is connected with the sleeve 1 to form the other connection position.
Aiming at a 100ml plastic syringe type sampling tube, in order to facilitate the connection of the sampling tube and a greenhouse gas analysis instrument, a set of gas constant-pressure automatic sampling device (granted patent No. ZL201510129979.7) of a syringe type sample tube is specially developed in 2015, and the use of the device greatly overcomes a plurality of defects brought by the sampling of a special sample bottle, ensures the efficiency of sample enrichment to sample quickly, completely and uniformly, and improves the stability and the accuracy. However, a single sample tube test mode cannot meet all-weather working timeliness, and in order to improve the utilization rate of the instrument under the unattended condition, a set of multi-channel full-automatic gas sample injection instrument is needed.
Disclosure of Invention
The invention aims to solve the problem that the injector sampling in the prior art needs to be carried out on duty, and provides a multi-position automatic sampling device which can fix a plurality of clamping units of sampling injectors and carry out automatic sampling.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the utility model provides a many autoinjectors, includes fixed plate rail for the drive the rotatory rotary driving structure of fixed plate rail, a plurality of one-to-one vertical clamps in the centre gripping unit of the sample syringe on the fixed position of fixed plate rail to and be located the appearance module of advancing on the analysis position, advance the appearance module and include dynamic gas interface structure, drive press the pressing plate with the completion advance appearance drive structure of appearance and the pneumatic valve drive structure of the three-jaw rotation in order to switch on the position of drive airtight valve of drive, wherein:
the clamping unit comprises a syringe clamping piece used for clamping the sleeve of the sampling syringe, a piston follower used for providing guidance for a pressing plate of the sampling syringe, and a chuck used for clamping and fixing the sleeve of the sampling syringe on the syringe clamping piece, wherein the piston follower is connected to the rear part of the syringe clamping piece in a sliding mode through a sliding assembly, and the clamping unit comprises a clamping unit, a clamping unit and a clamping unit, wherein the clamping unit is used for clamping the sleeve of the sampling syringe, the piston follower is used: the front end of the injector clamping piece is a positioning plate, a sample gas outlet and a purging port are formed in the positioning plate, a first connecting pipe is fixed on the sample gas outlet and is connected with the front port of the sampling injector, and a second connecting pipe is fixed on the purging port and is connected with the side port of the sampling injector;
the fixing plate frame comprises a positioning middle shaft, and a lower positioning plate, a middle positioning plate and an upper positioning plate which are detachably fixed on the positioning middle shaft in sequence from bottom to top, each fixing position comprises an upper positioning hole, a middle positioning hole and a lower positioning hole which are correspondingly formed on the upper positioning plate, the middle positioning plate and the lower positioning plate in sequence from top to bottom, and the upper positioning holes are used for the positioning plates to be inserted;
the dynamic gas interface structure comprises a connecting pressing plate, a blowing and discharging needle which is fixed on the connecting pressing plate and can be inserted into the connecting blowing port in a sealing manner, and a sampling needle which is fixed on the connecting pressing plate and can be inserted into the sample gas outlet in a sealing manner, wherein the connecting pressing plate is driven by a first driving structure to move up and down;
the air valve driving structure comprises a hand grip used for interfering the three claws, a second driving structure used for driving the hand grip to rotate and a third driving structure used for driving the hand grip to horizontally move.
In the technical scheme, the injector clamping piece comprises a front positioning part and a rear positioning part fixedly connected behind the front positioning part, the front positioning part is provided with an open groove for embedding a sleeve of the sampling injector, a slot is formed on the piston follower for inserting a pressing plate of the sampling injector, the tail end of the front positioning part is provided with a positioning outer edge, a clamping groove is formed on the chuck for inserting the positioning outer edge and a fixing flange of the sampling injector, and the chuck is clamped and fixed on the injector clamping piece;
the chuck is the arc chuck, the both ends of arc chuck all are formed with the block claw, the front end of back location portion is formed with the block groove, the block claw can match the card and go into the block inslot.
In the technical scheme, the sliding assembly comprises a strip-shaped hole formed in the rear part of the syringe clamping piece and a guide piece fixed on the piston follower, and the guide piece slides in the strip-shaped hole; the guide piece can adopt and be fixed in bolt on the piston follower, the screw rod of bolt is in slide in the bar hole, the nut of bolt is located outside the back location portion.
In the above technical solution, the side wall plate of the front positioning portion is a half-cylinder structure, the open groove is a semicircular through groove, the side wall plate of the rear positioning portion is an arc-shaped plate with an angle smaller than 180 °, the piston follower is a semicircular arc-shaped structure, and the chuck is a semicircular arc-shaped structure;
a circular hole is formed at the tail part of the injector clamping piece and is used for the driving end of the sample injection driving mechanism to enter;
a limiting convex ring is formed at the front end of the injector clamping piece, the inner diameter of the limiting convex ring is smaller than the outer diameter of the sleeve, the air-tight valve, the side port and the front port of the sampling injector can penetrate through the limiting convex ring, the sleeve cannot penetrate through the limiting convex ring, and the limiting convex ring and the chuck are matched to limit the position of the sleeve from the head end and the tail end respectively;
an airtight valve fixing piece is further fixed at the front end of the syringe clamping piece, and a side opening groove is formed in the side portion of the airtight valve fixing piece, so that the end portion of the airtight valve can be inserted from the side face.
In the above technical scheme, the multi-position automatic sample feeding device comprises sixteen fixing positions to fix sixteen clamping units.
In the above technical solution, the diameter of the upper positioning hole is the same as the diameter of the positioning plate, and the positioning plate is inserted in a matching manner, the diameter of the middle positioning hole is smaller than the outer diameter of the limit convex ring of the upper positioning portion, and the diameter of the lower positioning hole is smaller than the outer diameter of the chuck.
In the above technical solution, the rotation driving structure includes a ratchet wheel fixedly connected with the positioning central axis coaxially, a ratchet driving assembly driving the ratchet wheel to rotate, and a positioning pawl for providing positioning for the rotation of the ratchet wheel, wherein the positioning pawl and the ratchet driving assembly are located at two opposite sides of the ratchet wheel;
the ratchet drive assembly comprises a pull rod cylinder, a pull rod driven by the pull rod cylinder and a drive pawl rotationally connected to the middle of the pull rod through a connecting shaft, and two ends of the pull rod are slidably connected to the pull rod seat.
In the above technical scheme, many autoinjection devices still include the fixed plate, pull rod seat, pull rod cylinder all are fixed in on the bottom surface of fixed plate, the location pawl pass through the connecting axle rotate connect in on the bottom surface of fixed plate, the location axis with the fixed plate rotates and connects.
In the above technical solution, the first driving structure is a first cylinder, the third driving structure is a linear acting cylinder, and the second driving structure is a rotary acting cylinder, wherein a cylinder body of the rotary acting cylinder is fixed on a connecting plate, and the connecting plate is fixed on a piston rod of the linear acting cylinder;
the sample injection driving structure is a sample injection driving cylinder, and a piston rod of the sample injection driving cylinder can penetrate through a round hole in the tail part of the injector clamping piece to drive the pressing plate.
In the above technical solution, the first driving structure is a first air cylinder, the first air cylinder is fixed on the fixing plate through a first bracket, the first bracket is further provided with a guide rod and a guide block slidably connected with the guide rod, the guide block is fixed on a piston rod of the first air cylinder, and the connecting pressing plate is fixedly connected with the guide block;
the third driving structure is a linear acting cylinder, the second driving structure is a rotary acting cylinder, a cylinder body of the rotary acting cylinder is fixed on a connecting plate, and the connecting plate is fixed on a piston rod of the linear acting cylinder;
advance a kind drive structure and drive actuating cylinder for advancing a kind, the piston rod that advances a kind and drive actuating cylinder can pass the round hole of syringe holder afterbody is pressed the board with the drive, advance a kind and drive actuating cylinder and be fixed in the below of fixed plate, also be formed with the confession on the fixed plate advance a kind and drive the through-hole that the piston rod of actuating cylinder wore out.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can complete the analysis and determination of the carbon, nitrogen, hydrogen and oxygen isotope abundances in greenhouse gases by matching with a gas isotope enrichment analyzer, and provides technical support for researching the mechanism and migration rule of the generation of the greenhouse gases and the carbon-nitrogen cycle of an ecological system.
2. The invention can realize automatic sample introduction, avoid the influence of the difference of manual operation and the non-uniformity of sample introduction time on the stability of the test, save manpower and material resources, ensure the accuracy and reliability of data, greatly save the test time, shorten the storage period of samples, improve the use efficiency of instruments and better serve scientific research.
3. The clamping unit of the sampling injector stably fixes the radial direction of the sampling injector in an embracing mode, the fixing stability is high, and the clamping unit also has a guiding function, so that the piston pushing handle is prevented from deviating when the sampling injector is used, and the sampling uniformity is high.
4. The clamping unit of sample syringe and sample dish cooperation operation can be stabilized fixedly to the sample syringe in vertical direction, and fixed stability is strong, and getting of the sample syringe of being convenient for in addition is operated labour saving and time saving.
5. The sampling injector is standardized, and the geometric interface of each sampling injector is consistent and reliable through the clamping unit of the sampling injector. The air-tight valve can be effectively fixed and tightly clamped, air leakage in the operation process can be prevented, and the front port and the side port of the sampling injector are positioned at the determined positions convenient for dynamic linkage.
Drawings
FIG. 1 is a schematic diagram of a syringe-type sampling tube in the prior art.
Fig. 2 is a schematic structural view of a holding unit of the sampling syringe.
Fig. 3 is a schematic structural view of a holding unit of the sampling syringe.
Fig. 4 is a schematic structural diagram of the multi-position automatic sample feeding device.
Fig. 5 is a schematic structural view of a rotation driving structure.
Figure 6 is a schematic view of the construction of the ratchet drive assembly.
In the figure: 1-a sleeve, 2-a piston push handle, 3-a press plate, 4-an airtight valve, 5-a side port, 6-a front port, 7-a fixing flange, 8-a piston follower, 9-a chuck, 10-a front positioning portion, 11-a rear positioning portion, 12-an open groove, 13-a slot, 14-a positioning outer edge, 15-a positioning plate, 16-a sample gas outlet, 17-a purge port, 18-a first connecting tube, 19-a second connecting tube, 20-a strip-shaped hole, 21-a guide, 22-a circular hole, 23-an airtight valve fixing member, 24-a lower positioning plate, 25-a middle positioning plate, 26-an upper positioning plate, 27-an upper positioning hole, 28-a middle positioning hole, 29-a lower positioning hole, 30-a connecting press plate, 31-purging discharge needle, 32-sampling needle, 33-first driving structure, 34-ratchet wheel, 35-positioning pawl, 36-pull rod cylinder, 37-pull rod, 38-pull rod seat, 39-driving pawl, 40-fixing plate, 41-guide rod, 42-guide block, 43-third driving structure, 44-second driving structure, 45-connecting plate, 46-sampling driving cylinder, 47-clamping groove, 48-limiting convex ring and 49-clamping claw.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The utility model provides a many autoinjectors, includes fixed plate rail for the drive the rotatory rotary driving structure of fixed plate rail, a plurality of one-to-one vertical clamps in the centre gripping unit of the sample syringe on the fixed position of fixed plate rail to and be located the appearance module of advancing on the analysis position, advance the appearance module and include dynamic gas interface structure, drive press plate 3 with the gas valve drive structure of switching-on position of accomplishing advance the appearance drive structure of appearance and the three-jaw rotation of drive airtight valve 4, wherein:
the clamping unit comprises a syringe clamping piece for clamping the sleeve 1 of the sampling syringe, a piston follower 8 for providing guidance for the pressing plate 3 of the sampling syringe, and a chuck 9 for clamping and fixing the sleeve 1 of the sampling syringe on the syringe clamping piece, wherein the piston follower 8 is connected to the rear part of the syringe clamping piece in a sliding way through a sliding assembly, and the clamping unit comprises:
the front end of the front positioning part 10 is a positioning plate 15, a sample gas outlet 16 and a purging port 17 are formed on the positioning plate 15, a first connecting pipe 18 is fixed on the sample gas outlet 16 to connect with the front port 6 of the sampling injector, and a second connecting pipe 19 is fixed on the purging port 17 to connect with the side port 5 of the sampling injector.
When the sampling injector is fixed to the clamping unit, the sampling injector is placed in the injector clamping piece, the pressing plate 3 is inserted into the piston follower 8 and fixed, the front port 6 is inserted into the first connecting pipe 18, the end part of the second connecting pipe 19 is inserted into the side port 5, the chuck 9 is clamped on the injector clamping piece, the chuck 9 and the injector clamping piece are clasped left and right, and the sleeve 1 is clamped and fixed.
The fixing plate frame comprises a positioning middle shaft, and a lower positioning plate 24, a middle positioning plate 25 and an upper positioning plate 26 which are sequentially detachably fixed on the positioning middle shaft from bottom to top, each fixing position comprises an upper positioning hole 27, a middle positioning hole 28 and a lower positioning hole 29 which are sequentially formed on the upper positioning plate 26, the middle positioning plate 25 and the lower positioning plate 24 in a corresponding mode from top to bottom, and the upper positioning hole 27 is used for inserting the positioning plate 15;
the dynamic gas interface structure comprises a connecting pressing plate 30, a purging discharge needle 31 which is fixed on the connecting pressing plate 30 and can be inserted into the connecting purging port 17 in a sealing manner, and a sampling needle 32 which is fixed on the connecting pressing plate 30 and can be inserted into the sample gas outlet 16 in a sealing manner, wherein the connecting pressing plate 30 is driven by a first driving structure 33 to move up and down;
the air valve driving structure comprises a hand grip for interfering the three claws, a second driving structure 44 for driving the hand grip to rotate and a third driving structure 43 for driving the hand grip to horizontally move.
The analysis position is a position for sampling the sampling injector on the fixed tray frame, and the injectors fixed on the clamping units of the sampling injectors are conveyed to the analysis position one by one along with the rotation of the fixed tray frame, so that the purging and the sampling are completed on the analysis position. The air valve driving structure is driven once, the three claws of the air-tight valve 4 rotate 90 degrees to complete the switching of a connecting position, so that the front port 6 is communicated with the side port 5 or the sleeve 1. The structure of the hand grip can be any structure which can drive the three claws to rotate.
The sampling needle 32 and the blowing and discharging needle 31 are fixed on the connecting pressing plate 30, and after the two needles penetrate through the connecting pressing plate 30, the needle tip part is positioned below the connecting pressing plate 30. When the connection pressure plate 30 is driven downward, a sampling needle 32 and a purge discharge needle 31 may be fittingly inserted into the sample gas outlet 16 and the connection purge port 17, the sampling needle 32 externally connecting a purge gas source and an analysis apparatus through a pipe, and the purge discharge needle 31 for discharging purge gas (helium carrier gas).
The sample introduction method of the multi-position automatic sample introduction device comprises the following steps:
step 1, assembling the sampling injectors on clamping units of the sampling injectors one by one, and fixing the clamping units on a fixed tray rack one by one;
step 3, the third driving structure 43 drives the gripper to approach to the three claws interfering with the airtight valve 4, the second driving structure 44 drives the gripper to rotate, the three claws of the airtight valve 4 rotate along with the gripper until the front port 6 and the side port 5 of the sampling injector are communicated, purge gas is introduced through the sampling needle 32 and purges the triangular area at the front end of the sampling injector, the purge gas sequentially passes through the sampling needle 32, the front port 6 of the sampling injector and the side port 5 of the sampling injector and is discharged from the purge discharge needle 31, after purging is completed, the second driving structure 44 drives the gripper to rotate, the three claws of the airtight valve 4 rotate along with the gripper until the sleeve of the sampling injector is communicated with the front port 6, the sample introduction driving structure drives the pressing plate 3, the piston follower 8 follows, at this time, the sample gas in the sleeve is led out through the sampling needle 32 and enters into analysis equipment under the action of the purge gas (the purge gas provides driving force, sample gas is sent into the analysis equipment), once sampling is completed, the sample injection driving structure is reset, the second driving structure 44 and the third driving structure 43 drive the gripper to reset, the first driving structure 33 drives the connecting pressing plate 30 to move upwards, and the purging and discharging needle 31 are separated from the positioning plate 15;
step 4, the rotary driving structure drives the fixed tray frame to rotate, and the next adjacent sampling injector enters an analysis position;
and 6, after sample injection is completed, disassembling each clamping unit and the sampling injector from the fixed tray frame.
Furthermore, the multi-position automatic sample feeding device comprises sixteen fixing positions for fixing the sixteen clamping units. The rotary driving structure drives the fixed disc frame once, the fixed disc frame rotates once, and the next fixed position is sent to the analysis position for sampling analysis in each rotation.
Example 2
This embodiment further describes each component of the clamping unit on the basis of embodiment 1.
In order to stably clamp and fix the sleeve 1, the syringe clamping member comprises a front positioning portion 10 and a rear positioning portion 11 fixedly connected behind the front positioning portion 10, an open groove 12 is formed in the front positioning portion 10 for the sleeve 1 of the sampling syringe to be embedded in, a slot 13 is formed in the piston follower 8 for the pressing plate 3 of the sampling syringe to be inserted in, a positioning outer edge 14 is formed at the tail end of the front positioning portion 10, a clamping groove 47 is formed in the chuck 9 for the positioning outer edge 14 and the fixing flange 7 of the sampling syringe to be inserted in, and the chuck 9 is clamped and fixed on the syringe clamping member.
When the sampling syringe is inserted, the pressing plate 3 of the sampling syringe is inserted into the insertion groove 13 of the piston follower 8, and when the clamping is performed, the fixing flange 7 and the positioning rim 14 are simultaneously inserted into the chuck 9, thereby fixing the sampling syringe to the syringe holder. The second connection tube 19 is a hose with a plug fixed to the end thereof so as to be connected to the side port 5 opened on the side.
In order to facilitate the clamping of the chuck 9 on the injector clamping piece, the chuck 9 is an arc-shaped chuck 9, clamping claws 49 are formed at both ends of the arc-shaped chuck 9, a clamping groove is formed at the front end of the rear positioning part 11, and the clamping claws can be matched and clamped into the clamping groove. When the arc chuck 9 is pushed to be clamped on the injector clamping piece, the arc chuck 9 generates small elastic deformation, and the clamping claw 49 is clamped in the clamping groove.
In order to facilitate the movement of the piston follower 8, the sliding assembly includes a strip-shaped hole 20 formed at the rear of the syringe holder and a guide 21 fixed to the piston follower 8, the guide 21 sliding in the strip-shaped hole 20.
More preferably, the guide 21 may be a bolt fixed to the piston follower 8, a screw of the bolt slides in the strip-shaped hole 20, and a nut of the bolt is located outside the rear positioning portion 11 to prevent the guide 21 from being removed from the strip-shaped hole 20. In order to ensure that the direction of movement of the piston follower 8 does not deviate, the sliding assemblies are provided with three sets.
In order to fix the sampling injector with a cylindrical structure well, the side wall plate of the front positioning part 10 is in a half-cylinder structure, the open groove 12 is a semicircular through groove, the side wall plate of the rear positioning part 11 is an arc-shaped plate with an angle smaller than 180 degrees, the piston follower 8 is in a semicircular arc-shaped structure, and the chuck 9 is in a semicircular arc-shaped structure.
In order to provide space for the sample drive mechanism to drive the plunger push handle 2, a circular hole 22 is formed at the rear of the injector holder for the drive end of the sample drive mechanism to enter.
For more stable fixing of the sampling syringe, the front end of the syringe holder is formed with a stopper collar 48, and the inner diameter of the stopper collar 48 is smaller than the outer diameter of the sleeve 1. The air-tight valve 4, the side port 5 and the front port 6 can pass through the limit convex ring 48, the sleeve 1 cannot pass through the limit convex ring 48, and the limit convex ring 48 and the chuck 9 respectively limit the position of the sleeve 1 from the head end and the tail end under the cooperation action, so that the sleeve 1 is well positioned. The limiting convex ring 48 and the positioning outer edge 14 are respectively fixed at two opposite ends of the side wall plate of the front positioning portion 10, and the positioning plate 15 is fixed on the limiting convex ring 48 through two connecting side wall plates.
In order to stably fix the airtight valve 4, an airtight valve fixing member 23 is further fixed to a front end of the syringe holder, and a side portion of the airtight valve fixing member 23 is formed with a side-opened groove into which an end portion of the airtight valve 4 is inserted from a side surface. The airtight valve fixing member 23 is fixed to the rear positioning portion 11 by a fixing rod. The airtight valve fixing member 23 is located between the two connecting side wall panels.
Example 3
In this embodiment, each driving structure and fixing position will be further described based on embodiment 1.
The diameter of the upper positioning hole 27 is the same as that of the positioning plate 15, so that the positioning plate 15 can be inserted in a matching way, the diameter of the middle positioning hole 28 is smaller than the outer diameter of a limit convex ring 48 of the upper positioning part, and the diameter of the lower positioning hole 29 is smaller than the outer diameter of the chuck 9.
As in step 1 of embodiment 2, when the clamping unit of the sampling syringe is fixed on the fixed tray, the upper positioning plate 26 is first detached, the sampling syringe is placed on the syringe clamping member, the syringe clamping member is inserted into the corresponding middle positioning hole 28 and lower positioning hole 29, then the chuck 9 is clamped on the syringe clamping member above the lower positioning hole 29, at this time, the limiting convex ring 48 is clamped above the upper positioning hole 27, and finally the upper positioning plate 26 is installed on the positioning middle shaft.
As shown in fig. 5-6, the rotary driving structure includes a ratchet wheel 34 coaxially and fixedly connected to the positioning central axis, a ratchet driving component for driving the ratchet wheel to rotate, and a positioning pawl 35 for providing positioning for the ratchet wheel to rotate, wherein the positioning pawl 35 and the ratchet driving component are located at two opposite sides of the ratchet wheel;
the ratchet drive assembly comprises a pull rod cylinder 36, a pull rod 37 driven by the pull rod cylinder 36 and a drive pawl 39 rotationally connected to the middle of the pull rod through a connecting shaft, and two ends of the pull rod 37 are slidably connected to a pull rod seat 38.
As the pull rod cylinder 36 pulls the pull rod, the driving pawl 39 swings to drive the ratchet wheel 34 to rotate, and the driving pawl 39 and the positioning pawl 35 work together, so that the ratchet wheel 34 rotates for a fixed angle every time, and the cylinder 36 works once to drive the ratchet wheel 34 to drive the fixed disc frame to rotate for a fixed position.
More preferably, the multi-position automatic sample feeding device further comprises a fixing plate 40, the pull rod seat 38 and the pull rod cylinder 36 are both fixed on the bottom surface of the fixing plate 40, the positioning pawl 35 is rotatably connected to the bottom surface of the fixing plate 40 through a connecting shaft, and the positioning middle shaft is rotatably connected to the fixing plate 40. A gap is maintained between the rear end of the clamping unit and the fixing plate 40.
In order to stably drive the connecting pressing plate 30, the first driving structure 33 is a first cylinder, the first cylinder is fixed on the fixing plate 40 through a first bracket, the first bracket is further provided with a guide rod 41 and a guide block 42 slidably connected with the guide rod 41, the guide block 42 is fixed on a piston rod of the first cylinder, and the connecting pressing plate 30 is fixedly connected with the guide block 42. The connection pressure plate 30 can be fixedly connected with the guide block 42 through the sampling needle 32. The top of the sampling needle 3 is fixed on the guide block 42, and the bottom is fixed on the connecting pressure plate 30.
For stable driving of the gripper, the third driving structure 43 is a linear acting cylinder and the second driving structure 44 is a rotary acting cylinder, wherein the cylinder body of the rotary acting cylinder is fixed on a connecting plate 45, and the connecting plate 45 is fixed on the piston rod of the linear acting cylinder. The third driving structure 43 may be fixed to the fixing plate 40 by a separate bracket, or may be fixed to the fixing plate 40 by a first bracket.
For stable drive press plate 3, advance a kind of drive structure and drive actuating cylinder 46 for advancing a kind, the piston rod that advances a kind and drive actuating cylinder 46 can pass round hole 22 drive press plate 3.
More preferably, the sample injection driving cylinder 46 is fixed below the fixing plate 40, and a through hole for the piston rod of the sample injection driving cylinder 46 to penetrate out is also formed on the fixing plate 40.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a many autoinjectors, its characterized in that, includes fixed plate rail, is used for the drive the rotatory rotary driving structure of fixed plate rail, a plurality of one-to-one vertical clamps in the clamping unit of the sample injector on the fixed position of fixed plate rail to and be located the appearance module of advancing on the analysis position, advance the appearance module and include dynamic gas interface structure, drive press the pressure board with the gas valve drive structure of switching-on position of accomplishing the three-jaw rotation of advancing kind drive structure and drive airtight valve of appearance, wherein:
the clamping unit comprises a syringe clamping piece used for clamping the sleeve of the sampling syringe, a piston follower used for providing guidance for a pressing plate of the sampling syringe, and a chuck used for clamping and fixing the sleeve of the sampling syringe on the syringe clamping piece, wherein the piston follower is connected to the rear part of the syringe clamping piece in a sliding mode through a sliding assembly, and the clamping unit comprises a clamping unit, a clamping unit and a clamping unit, wherein the clamping unit is used for clamping the sleeve of the sampling syringe, the piston follower is used: the front end of the injector clamping piece is a positioning plate, a sample gas outlet and a purging port are formed in the positioning plate, a first connecting pipe is fixed on the sample gas outlet and is connected with the front port of the sampling injector, and a second connecting pipe is fixed on the purging port and is connected with the side port of the sampling injector;
the fixing plate frame comprises a positioning middle shaft, and a lower positioning plate, a middle positioning plate and an upper positioning plate which are detachably fixed on the positioning middle shaft in sequence from bottom to top, each fixing position comprises an upper positioning hole, a middle positioning hole and a lower positioning hole which are correspondingly formed on the upper positioning plate, the middle positioning plate and the lower positioning plate in sequence from top to bottom, and the upper positioning holes are used for the positioning plates to be inserted;
the dynamic gas interface structure comprises a connecting pressing plate, a blowing and discharging needle which is fixed on the connecting pressing plate and can be inserted into the connecting blowing port in a sealing manner, and a sampling needle which is fixed on the connecting pressing plate and can be inserted into the sample gas outlet in a sealing manner, wherein the connecting pressing plate is driven by a first driving structure to move up and down;
the air valve driving structure comprises a hand grip used for interfering the three claws, a second driving structure used for driving the hand grip to rotate and a third driving structure used for driving the hand grip to horizontally move.
2. The multi-position automatic sample introduction device according to claim 1, wherein the syringe holder comprises a front positioning portion and a rear positioning portion fixedly connected to the front positioning portion, the front positioning portion is formed with an open slot for the insertion of the sleeve of the sampling syringe, the piston follower is formed with a slot for the insertion of the pressing plate of the sampling syringe, the front positioning portion is formed with a positioning outer edge at the tail end, the chuck is formed with a slot for the insertion of the positioning outer edge and the fixing flange of the sampling syringe, and the chuck is fixed to the syringe holder in a clamping manner;
the chuck is the arc chuck, the both ends of arc chuck all are formed with the block claw, the front end of back location portion is formed with the block groove, the block claw can match the card and go into the block inslot.
3. The multi-position autosampler apparatus of claim 2, wherein said slide assembly comprises a slot formed in a rear portion of said syringe holder and a guide secured to said piston follower, said guide sliding within said slot; the guide piece can adopt and be fixed in bolt on the piston follower, the screw rod of bolt is in slide in the bar hole, the nut of bolt is located outside the back location portion.
4. The multi-position automatic sample feeding device according to claim 2, wherein the side wall plate of the front positioning portion is a semi-cylindrical structure, the open groove is a semi-circular through groove, the side wall plate of the rear positioning portion is an arc-shaped plate with an angle smaller than 180 degrees, the piston follower is a semi-circular arc-shaped structure, and the chuck is a semi-circular arc-shaped structure;
a circular hole is formed at the tail part of the injector clamping piece and is used for the driving end of the sample injection driving mechanism to enter;
a limiting convex ring is formed at the front end of the injector clamping piece, the inner diameter of the limiting convex ring is smaller than the outer diameter of the sleeve, the air-tight valve, the side port and the front port of the sampling injector can penetrate through the limiting convex ring, the sleeve cannot penetrate through the limiting convex ring, and the limiting convex ring and the chuck are matched to limit the position of the sleeve from the head end and the tail end respectively;
an airtight valve fixing piece is further fixed at the front end of the syringe clamping piece, and a side opening groove is formed in the side portion of the airtight valve fixing piece, so that the end portion of the airtight valve can be inserted from the side face.
5. A multi-position autosampler according to claim 1, wherein said multi-position autosampler comprises sixteen holding positions to hold sixteen of said gripping units.
6. The multi-position automatic sample feeding device according to claim 1, wherein the diameter of the upper positioning hole is the same as the diameter of the positioning plate for the positioning plate to be inserted, the diameter of the middle positioning hole is smaller than the outer diameter of the limiting convex ring of the upper positioning part, and the diameter of the lower positioning hole is smaller than the outer diameter of the chuck.
7. The multi-position autosampler device of claim 1, wherein said rotary drive structure comprises a ratchet wheel coaxially and fixedly connected to said positioning central axis, a ratchet drive assembly for driving rotation of said ratchet wheel, and a positioning pawl for providing positioning for rotation of said ratchet wheel, said positioning pawl and said ratchet drive assembly being located on opposite sides of said ratchet wheel;
the ratchet drive assembly comprises a pull rod cylinder, a pull rod driven by the pull rod cylinder and a drive pawl rotationally connected to the middle of the pull rod through a connecting shaft, and two ends of the pull rod are slidably connected to the pull rod seat.
8. The multi-position automatic sample feeding device according to claim 7, further comprising a fixing plate, wherein the pull rod seat and the pull rod cylinder are fixed on the bottom surface of the fixing plate, the positioning pawl is rotatably connected to the bottom surface of the fixing plate through a connecting shaft, and the positioning middle shaft is rotatably connected to the fixing plate.
9. The multi-position automatic sample feeding device according to claim 1, wherein the first driving structure is a first cylinder, the third driving structure is a linear acting cylinder, and the second driving structure is a rotary acting cylinder, wherein a cylinder body of the rotary acting cylinder is fixed on a connecting plate, and the connecting plate is fixed on a piston rod of the linear acting cylinder;
the sample injection driving structure is a sample injection driving cylinder, and a piston rod of the sample injection driving cylinder can penetrate through a round hole in the tail part of the injector clamping piece to drive the pressing plate.
10. The multi-position automatic sample feeding device according to claim 9, wherein the first driving structure is a first cylinder, the first cylinder is fixed on the fixing plate through a first bracket, the first bracket is further provided with a guide rod and a guide block slidably connected with the guide rod, the guide block is fixed on a piston rod of the first cylinder, and the connection pressing plate is fixedly connected with the guide block;
the third driving structure is a linear acting cylinder, the second driving structure is a rotary acting cylinder, a cylinder body of the rotary acting cylinder is fixed on a connecting plate, and the connecting plate is fixed on a piston rod of the linear acting cylinder;
advance a kind drive structure and drive actuating cylinder for advancing a kind, the piston rod that advances a kind and drive actuating cylinder can pass the round hole of syringe holder afterbody is pressed the board with the drive, advance a kind and drive actuating cylinder and be fixed in the below of fixed plate, also be formed with the confession on the fixed plate advance a kind and drive the through-hole that the piston rod of actuating cylinder wore out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344906.0A CN111381069B (en) | 2020-04-27 | 2020-04-27 | Multi-position automatic sample injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344906.0A CN111381069B (en) | 2020-04-27 | 2020-04-27 | Multi-position automatic sample injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111381069A true CN111381069A (en) | 2020-07-07 |
| CN111381069B CN111381069B (en) | 2024-06-21 |
Family
ID=71217585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010344906.0A Active CN111381069B (en) | 2020-04-27 | 2020-04-27 | Multi-position automatic sample injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111381069B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115783469A (en) * | 2023-02-07 | 2023-03-14 | 融越医疗科技(江苏)有限公司 | Medical treatment detects sampling device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698206A (en) * | 2015-03-24 | 2015-06-10 | 中国科学院寒区旱区环境与工程研究所 | Gas constant-pressure automatic sampling device of injector type sample tube |
| US20160202152A1 (en) * | 2013-09-03 | 2016-07-14 | Institute of Bontany of the Chinese Academy of Sciences | A gas autosampler |
| CN105891391A (en) * | 2016-06-29 | 2016-08-24 | 天津博纳艾杰尔科技有限公司 | Automatic sampling device |
| CN107478857A (en) * | 2016-06-08 | 2017-12-15 | 中国石油化工股份有限公司 | A kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes |
| CN111381008A (en) * | 2020-04-27 | 2020-07-07 | 江西农业大学 | Sample introduction method of multi-position automatic sample introduction device |
| CN212228972U (en) * | 2020-04-27 | 2020-12-25 | 江西农业大学 | Multi-position automatic sample introduction device |
-
2020
- 2020-04-27 CN CN202010344906.0A patent/CN111381069B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160202152A1 (en) * | 2013-09-03 | 2016-07-14 | Institute of Bontany of the Chinese Academy of Sciences | A gas autosampler |
| CN104698206A (en) * | 2015-03-24 | 2015-06-10 | 中国科学院寒区旱区环境与工程研究所 | Gas constant-pressure automatic sampling device of injector type sample tube |
| CN107478857A (en) * | 2016-06-08 | 2017-12-15 | 中国石油化工股份有限公司 | A kind of sampler for being used to analyze gaseous sample carbon-hydrogen isotopes |
| CN105891391A (en) * | 2016-06-29 | 2016-08-24 | 天津博纳艾杰尔科技有限公司 | Automatic sampling device |
| CN111381008A (en) * | 2020-04-27 | 2020-07-07 | 江西农业大学 | Sample introduction method of multi-position automatic sample introduction device |
| CN212228972U (en) * | 2020-04-27 | 2020-12-25 | 江西农业大学 | Multi-position automatic sample introduction device |
Non-Patent Citations (1)
| Title |
|---|
| 李林桃: "在线气相色谱分析仪的故障分析与处理", 《仪器仪表标准化与计量 》, 26 June 2019 (2019-06-26) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115783469A (en) * | 2023-02-07 | 2023-03-14 | 融越医疗科技(江苏)有限公司 | Medical treatment detects sampling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111381069B (en) | 2024-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111381008B (en) | Sample introduction method of multi-position automatic sample introduction device | |
| JP6616090B2 (en) | Equipment for solid-phase microextraction | |
| US8006540B2 (en) | Automatic solid-phase microextraction sampling apparatus | |
| US20190137526A1 (en) | A sampling apparatus | |
| CN212228972U (en) | Multi-position automatic sample introduction device | |
| JP2003329661A (en) | Sample manipulating device for analyzer | |
| CN111381069A (en) | Multi-position automatic sample introduction device | |
| CN103439138B (en) | Liquid adding, even-mixing, sampling and pretreating integrated machine and realizing method thereof | |
| CN104698206B (en) | The gas constant voltage automatic sampling apparatus of syringe type sample cell | |
| CN212301457U (en) | VOCs and IVOCs are online collection and detection device simultaneously | |
| CN213221055U (en) | Solid phase extraction device | |
| KR20220061374A (en) | Apparatus for auto analyzing samples with thermal desorption system | |
| CN105758699B (en) | A kind of solvent desorption device and its measuring method | |
| AU2021102451A4 (en) | A Injection Method of Multi-position automatic Injection Device | |
| CN208297430U (en) | A kind of secondary parsing thermal desorption device of binary channels | |
| CN208399448U (en) | A kind of autosampler of carry sample store function | |
| CN108469490B (en) | Automatic analysis device for components and carbon isotopes of gas in thermal simulation gold tube of hydrocarbon source rock | |
| De Koning et al. | Automated liner exchange—A novel approach in direct thermal desorption—gas chromatography | |
| CN109470547B (en) | Gradient thermal analysis sample injector | |
| CN111521455A (en) | Clamping unit and clamping method of sampling injector | |
| CN115980378A (en) | Full-automatic multi-station recovery function thermal desorption instrument | |
| CN111380986A (en) | Volatile to-be-detected substance enricher capable of realizing cross purging of nitrogen and helium and application of volatile to-be-detected substance enricher in soil sample detection | |
| CN206671292U (en) | A kind of volatile organic matter device for quick testing | |
| CN210347556U (en) | Extremely rare sample direct determination enrichment sampling system | |
| CN2620277Y (en) | Gas flow circuit device for heat desorption apparatus |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |