CN118150746A - Gas chromatograph sample leading-in device - Google Patents
Gas chromatograph sample leading-in device Download PDFInfo
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- CN118150746A CN118150746A CN202410557659.0A CN202410557659A CN118150746A CN 118150746 A CN118150746 A CN 118150746A CN 202410557659 A CN202410557659 A CN 202410557659A CN 118150746 A CN118150746 A CN 118150746A
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- storage barrel
- sample introduction
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- 238000004140 cleaning Methods 0.000 claims abstract description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000001125 extrusion Methods 0.000 claims abstract description 37
- 229910052742 iron Inorganic materials 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 88
- 238000002347 injection Methods 0.000 claims description 72
- 239000007924 injection Substances 0.000 claims description 72
- 238000003860 storage Methods 0.000 claims description 45
- 238000005192 partition Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 1
- 235000017491 Bambusa tulda Nutrition 0.000 claims 1
- 241001330002 Bambuseae Species 0.000 claims 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 1
- 239000011425 bamboo Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002904 solvent Substances 0.000 abstract description 7
- 239000011550 stock solution Substances 0.000 abstract description 6
- 238000005096 rolling process Methods 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000005406 washing Methods 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 103
- 238000003780 insertion Methods 0.000 description 12
- 230000037431 insertion Effects 0.000 description 12
- 239000000243 solution Substances 0.000 description 10
- 238000003825 pressing Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000012488 sample solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical class OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the technical field of gas chromatographs, in particular to a sample introduction device of a gas chromatograph, which comprises an outer shell, wherein a sample inlet is arranged at one side of the top end of the outer shell. This gas chromatograph sample introduction device, when wasing the sample introduction needle, only need drive mount and sample introduction needle through the spacing dish and wholly rotate 180 degrees for the sample introduction needle inserts the inside of establishing into the cartridge, cooperation rolling disc, spacing post, the reference column, the connecting block, spacing frame, magnet one and the operation of iron plate one, make the vertical reciprocating motion of carriage, with this inside piston rod of driving the sample introduction needle slowly rises and descends repeatedly operation fast, cooperation stock solution bucket inside baffle simultaneously, unidirectional feed valve pipe and unidirectional drain valve pipe's setting, thereby can be with the solvent through unidirectional feed valve pipe suction into the sample introduction needle inside, later the rethread unidirectional drain valve pipe discharges, reach the washing operation of slow pumping quick row, holistic suction extrusion cleaning effect is good, need not manual operation.
Description
Technical Field
The invention relates to the technical field of gas chromatographs, in particular to a sample leading-in device of a gas chromatograph.
Background
The gas chromatograph can be used for analyzing organic matters with heat stability and boiling point not exceeding 500 ℃ in soil, such as volatile organic matters, polycyclic aromatic hydrocarbons, phthalate esters and the like, and has the advantages of rapidness, effectiveness, high sensitivity and the like.
Chinese patent CN116087387B discloses a sample introduction device for gas chromatograph, wherein the sample is pre-purified by the sample introduction assembly, and the flow rate is regulated and controlled to ensure the quality of detection and analysis. Specifically, a plurality of groups of regulation and control column members are arranged on the regulation and control turntable, tapered holes are formed in the regulation and control column members, the tapered holes are formed in each regulation and control column member at equal intervals, the apertures of the tapered holes in each regulation and control column member are different, and the regulation and control function is achieved on the circulation of samples; and the sample can be subjected to pre-purification treatment through the impurity-removing cotton and the purification disc, so that the detection and analysis quality of the sample is ensured, and the actual working requirements are met.
The sample injection needle used in the sample introduction of the existing gas chromatograph needs to be cleaned when in use, the sample injection needle is usually manually inserted into the solvent which is the same as the sample to be measured for suction during cleaning, then the sample injection needle is taken out and the suction solvent in the sample injection needle is extruded and discharged, so that repeated operation is carried out for a plurality of times, the cleaning is completed, the whole cleaning operation is troublesome, and the sample injection needle has certain limitation during actual use.
Disclosure of Invention
The invention aims to provide a sample introduction device for a gas chromatograph, which aims to solve the problems that a sample injection needle used in the prior art for introducing the sample of the gas chromatograph usually needs to be manually inserted into a solvent which is the same as a sample to be measured for suction during cleaning, then the sample injection needle is taken out and the solvent sucked inside the sample injection needle is extruded and discharged, so that repeated operations are carried out for a plurality of times, the cleaning is completed, the whole cleaning operation is troublesome, and the practical use is limited to a certain extent.
In order to achieve the above purpose, the present invention provides the following technical solutions: a sample introduction device for a gas chromatograph comprises
The sample injection device comprises an outer shell, wherein a sample inlet is arranged at one side of the top end of the outer shell, a mounting rack is fixed at one side of the outer shell, which is close to the sample inlet, and a sample injection needle is longitudinally arranged at one side of the top end of the sample inlet;
the cleaning mechanism is arranged on the mounting frame and is used for automatically cleaning the sample injection needle;
the cleaning mechanism comprises a rotating disc and a liquid storage barrel, the rotating disc is rotatably arranged at the top end of the mounting frame, and the liquid storage barrel is arranged at one side of the outer shell body, which is close to the rotating disc;
The separating mechanism is arranged outside one side of the liquid storage barrel;
and the pushing mechanism is arranged outside one side of the mounting frame close to the sample inlet.
Further, wiper mechanism still includes motor one, carriage, spacing post, reference column, connecting block and spacing frame, motor one is fixed in one side of mounting bracket, and the output and the rolling disc fixed connection of motor one, the mounting bracket is close to one side liftable of rolling disc and installs the carriage, the spacing post is installed to one side edge of rolling disc, be provided with the reference column on the mounting bracket, the reference column sets up in one side of rolling disc, spacing frame is installed to one side outside slidable of spacing post and reference column, the connecting block is installed in one side rotation of carriage, and the one end and the spacing frame rotation of connecting block are connected.
Further, wiper mechanism still includes first magnet, iron plate, motor two, limiting disc, mount, stock solution bucket and baffle, the bottom one side external fixation of carriage has first magnet, the top one side of injecting the needle is fixed with iron plate one, one side of mounting bracket is provided with motor two, and is fixed with the limiting disc on the output shaft of motor two, the middle part transverse fixation of limiting disc has the mount, injecting the needle slidable mounting is on the mount, the inside of stock solution bucket is fixed with arciform baffle.
Further, the cleaning mechanism further comprises an inserting cylinder, a one-way liquid inlet valve pipe and a one-way liquid discharge valve pipe, the top end of one side of the liquid storage cylinder, which is close to the arc-shaped partition plate, is provided with the inserting cylinder, the two sides of the bottom end of the inserting cylinder are respectively provided with the one-way liquid inlet valve pipe and the one-way liquid discharge valve pipe, and the bottoms of the one-way liquid inlet valve pipe and the one-way liquid discharge valve pipe are respectively arranged on the two sides of the arc-shaped partition plate.
Further, the cleaning mechanism further comprises a rubber ring, a liquid supply pipe and a discharge pipe, the rubber ring is fixed at the top end of the insertion cylinder, the liquid supply pipe is installed at the bottom end of one side of the liquid storage barrel, which is close to the one-way liquid inlet valve pipe, and the discharge pipe is installed at the bottom end of one side of the liquid storage barrel, which is close to the one-way liquid discharge valve pipe.
Further, break away from mechanism includes conflict piece, spacing, gyro wheel pole and clamp plate, the bottom both sides symmetry of spacing dish is fixed with the annular conflict piece of semicircle, two the juncture of conflict piece all sets up to the arc is domatic, one side that the mounting bracket is close to the stock solution bucket is fixed with the spacing, the gyro wheel pole is installed to liftable on the spacing, the gyro wheel end of gyro wheel pole is towards the bottom one side of conflict piece, the bottom mounting of gyro wheel pole has the clamp plate, the bottom and the stock solution bucket fixed connection of clamp plate.
Further, the disengaging mechanism further comprises a slide way, a sliding block, a reset spring, a telescopic rod and a compression spring, wherein the arc-shaped slide way is arranged on the upper side of the liquid storage barrel, the slide way is arranged right above the partition board, the sliding block is slidably installed on the slide way, the plug barrel is fixedly connected with the sliding block, the reset spring is installed between the sliding block and any one end of the slide way, the telescopic rod is fixed between the bottom end of the liquid storage barrel and the outer shell, and the compression spring is sleeved outside the telescopic rod.
Further, pushing down the mechanism includes magnet two, extrusion piece and link, one side of magnet one is fixed with magnet two, one side that magnet two kept away from magnet one is fixed with the extrusion piece, one side that the extrusion piece kept away from magnet two is the arcuation setting, one side that the mounting bracket is close to the extrusion piece is provided with the link, the link sets up for falling the L form, the rotatable gyro wheel of installing and extrusion piece complex of tip of the horizontal part of link.
Further, pushing down the mechanism still includes magnet three, auxiliary rod and conflict spring, the bottom one side of the vertical portion of link is fixed with magnet three, vertical portion one side slidable mounting of extrusion piece has horizontally auxiliary rod, the outside cover of auxiliary rod is established and is connected with conflict spring.
Further, pushing down the mechanism still includes gag lever post, extrusion spring and iron plate two, encircles advance needle interval equipartition has a plurality of gag lever posts, and the gag lever post sets up in iron plate two's downside, and the lower extreme and the mount slidable of gag lever post are connected, and all the cover is equipped with extrusion spring outward, and extrusion spring's both ends are connected with advance needle and mount respectively.
Compared with the prior art, the invention has the beneficial effects that:
When the sample needle is cleaned, the fixing frame and the sample needle are driven to integrally rotate 180 degrees through the limiting disc, the sample needle is inserted into the inner part of the push-in cylinder, the running of the rotary disc, the limiting column, the positioning column, the connecting block, the limiting frame, the magnet I and the iron block I are matched, the sliding frame longitudinally reciprocates, the piston rod in the sample needle is driven to slowly rise and rapidly descend to repeatedly run, the arrangement of the baffle in the liquid storage cylinder, the one-way liquid inlet valve pipe and the one-way liquid outlet valve pipe is matched, so that a solvent can be sucked into the sample needle through the one-way liquid inlet valve pipe, and then the solvent is rapidly discharged from the one-way liquid outlet valve pipe through extrusion, so that the cleaning operation of slow pumping and rapid discharging is achieved, the overall suction extrusion cleaning effect is good, manual operation is not needed, the operation is simple and convenient to operate, the cleaning efficiency is improved, meanwhile, the rubber ring at the top end of the push-in cylinder is used for cleaning the side wall of the sample needle, the sample needle can be scraped and wiped off by the residual solution of the sample needle tip when the sample needle is recovered, and the whole use effect is good.
Drawings
FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;
FIG. 2 is a schematic perspective view of the cleaning mechanism and disengaging mechanism of the present invention;
FIG. 3 is a schematic view of a perspective view of the mounting of the cleaning mechanism and the mounting frame of the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 3A according to the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 3B according to the present invention;
FIG. 6 is a schematic view of a partial sectional perspective structure of a liquid storage barrel of the present invention;
FIG. 7 is an enlarged schematic view of the structure of FIG. 6 according to the present invention;
FIG. 8 is a diagram illustrating the movement of a carriage driven by the swing of a spacing frame according to the present invention;
FIG. 9 is a schematic perspective view of the detachment mechanism of the present invention mounted with a mounting bracket;
FIG. 10 is an enlarged schematic view of the structure of FIG. 9D according to the present invention;
FIG. 11 is a schematic view of a bottom perspective view of a retainer plate and a bump block of the present invention;
FIG. 12 is a schematic view of a three-dimensional structure of a pressing mechanism and a mounting frame of the present invention;
FIG. 13 is an enlarged schematic view of the structure of FIG. 12E according to the present invention;
Fig. 14 is a schematic view showing the descent of the second magnet according to the present invention.
In the figure: 1. an outer housing; 2. a sample inlet; 3. a mounting frame; 4. a cleaning mechanism; 401. a first motor; 402. a rotating disc; 403. a carriage; 404. a limit column; 405. positioning columns; 406. a connecting block; 407. a limit frame; 408. a first magnet; 409. iron block I; 4010. a second motor; 4011. a limiting disc; 4012. a fixing frame; 4013. a liquid storage barrel; 4014. a partition plate; 4015. a plug cylinder; 4016. a one-way liquid inlet valve tube; 4017. a one-way liquid discharge valve pipe; 4018. a rubber ring; 4019. a liquid supply pipe; 4020. a discharge pipe; 5. a disengagement mechanism; 501. a collision block; 502. a limiting frame; 503. a roller bar; 504. a pressing plate; 505. a slideway; 506. a slide block; 507. a return spring; 508. a telescopic rod; 509. a compression spring; 6. a pressing mechanism; 601. a second magnet; 602. extruding a block; 603. a connecting frame; 604. a third magnet; 605. an auxiliary lever; 606. a contact spring; 607. a limit rod; 608. extruding a spring; 609. iron block II; 7. and a sample injection needle.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 14, the present invention provides a technical solution: the gas chromatograph sample introduction device comprises an outer shell 1, a cleaning mechanism 4, a disengaging mechanism 5 and a pushing mechanism 6, wherein a sample inlet 2 is arranged on one side of the top end of the outer shell 1, a mounting frame 3 is fixed on one side of the outer shell 1 close to the sample inlet 2, and a sample injection needle 7 is longitudinally arranged on one side of the top end of the sample inlet 2; the cleaning mechanism 4 is arranged on the mounting frame 3, and the cleaning mechanism 4 is used for automatically cleaning the sample injection needle 7; the cleaning mechanism 4 comprises a rotating disc 402 and a liquid storage barrel 4013, the rotating disc 402 is rotatably arranged at the top end of the mounting frame 3, the liquid storage barrel 4013 is arranged on one side, close to the rotating disc 402, of the outer shell 1, the disengaging mechanism 5 is arranged on one side, close to the sample inlet 2, of the liquid storage barrel 4013, and the pushing mechanism 6 is arranged on one side, close to the sample inlet 2, of the mounting frame 3.
In this embodiment, when in-service use, when needs wash sample introduction needle 7, start operation wiper mechanism 4, can carry out the washing operation of taking out soon to sample introduction needle 7 slowly through wiper mechanism 4 voluntarily, make holistic suction extrusion cleaning performance good, whole need not to carry out manual operation simultaneously, easy and simple to handle, improve cleaning efficiency, after wasing, the accessible is again started wiper mechanism 4 and is cooperated the operation that breaks away from mechanism 5 simultaneously, thereby can be with the sample introduction needle 7 rotation after wasing and break away from stock solution bucket 4013, reset to the top of sample introduction port 2, after sample introduction needle 7 rotation resets to the top of sample introduction port 2, push down mechanism 6 operation this moment, make the syringe needle of sample introduction needle 7 can insert the inside of establishing sample introduction port 2 voluntarily, the follow-up sample solution of being convenient for is poured into, the whole excellent in use effect.
In this embodiment, the cleaning mechanism 4 further includes a first motor 401, a sliding frame 403, a limiting post 404, a positioning post 405, a connecting block 406 and a limiting frame 407, the first motor 401 is fixed on one side of the mounting frame 3, an output end of the first motor 401 is fixedly connected with the rotating disc 402, the sliding frame 403 is installed on one side of the mounting frame 3, which is close to the rotating disc 402, in a lifting manner, the limiting post 404 is installed at an edge of one side of the rotating disc 402, the positioning post 405 is arranged on the mounting frame 3, the positioning post 405 is arranged on one side of the rotating disc 402, the limiting frame 407 is installed outside the limiting post 404 and the positioning post 405 in a sliding manner, the connecting block 406 is installed on one side of the sliding frame 403 in a rotating manner, and one end of the connecting block 406 is connected with the limiting frame 407 in a rotating manner.
The cleaning mechanism 4 further comprises a first magnet 408, a first iron block 409, a second motor 4010, a limiting disc 4011, a fixing frame 4012, a liquid storage barrel 4013 and a partition plate 4014, wherein the first magnet 408 is fixed on one side of the bottom end of the sliding frame 403, the first iron block 409 is fixed on the top end of the sample injection needle 7, the second motor 4010 is arranged on one side of the fixing frame 3, the second motor 4010 is fixedly connected with the outer shell 1 through a connecting plate, the second motor 4010 is located between the liquid storage barrel 4013 and the sample injection port 2, the limiting disc 4011 is fixed on an output shaft of the second motor 4010, the fixing frame 4012 is transversely fixed in the middle of the limiting disc 4011, the sample injection needle 7 is slidably mounted on one end of the fixing frame 4012 extending out of the limiting disc 4011, and the arc-shaped partition plate 4014 is fixed in the liquid storage barrel 4013.
The cleaning mechanism 4 further comprises an inserting cylinder 4015, a one-way liquid inlet valve tube 4016 and a one-way liquid discharge valve tube 4017, the top of one side of the liquid storage barrel 4013, which is close to the arc-shaped partition plate 4014, is longitudinally provided with the inserting cylinder 4015, the two sides of the bottom end of the inserting cylinder 4015 are respectively provided with the one-way liquid inlet valve tube 4016 and the one-way liquid discharge valve tube 4017, and the bottoms of the one-way liquid inlet valve tube 4016 and the one-way liquid discharge valve tube 4017 are respectively arranged on the two sides of the arc-shaped partition plate 4014.
The cleaning mechanism 4 further comprises a rubber ring 4018, a liquid supply pipe 4019 and a discharge pipe 4020, the rubber ring 4018 is fixed at the top end of the insertion tube 4015, the liquid supply pipe 4019 is installed at the bottom end of one side of the liquid storage barrel 4013, which is close to the one-way liquid inlet valve pipe 4016, and the discharge pipe 4020 is installed at the bottom end of one side of the liquid storage barrel 4013, which is close to the one-way liquid outlet valve pipe 4017.
The unidirectional liquid inlet valve tube 4016 and the unidirectional liquid outlet valve tube 4017 have the same structure, namely, the unidirectional valve is arranged on the pipelines.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, when the sample injection needle 7 needs to be cleaned, the motor two 4010 is started first, the motor two 4010 drives the limiting disc 4011 and the fixing frame 4012 to rotate 180 degrees, so that the sample injection needle 7 at the top end of the sample injection port 2 is driven to synchronously rotate 180 degrees, after rotating by a certain angle, the bottom needle head of the sample injection needle 7 is inserted into the insertion barrel 4015, the condition that leakage cannot occur during solution suction extrusion in the later period is ensured, and the tightness is ensured.
Simultaneously through the elastic clamping of the rubber ring 4018 on the top end of the insertion tube 4015 to the side wall of the needle head of the sample injection needle 7, the rubber ring 4018 can scrape residual solution on the needle head of the sample injection needle 7 and wipe the residual solution dry during recycling of the needle head of the sample injection needle 7, so that dripping pollution is avoided, the whole use effect is good, and meanwhile, the sealing effect is guaranteed.
When the sample needle 7 rotates in place, the first motor 401 is started, the first motor 401 drives the rotating disc 402 to rotate, and simultaneously, the limit of the limit frame 407 by the limit post 404 and the locating post 405 and the rotational connection limit of the limit frame 407 and the connecting block 406 are matched, so that the rotating disc 402 drives the sliding frame 403 to longitudinally reciprocate when rotating, the first magnet 408 on one side is matched with the adsorption of the first iron block 409 on the top end of the sample needle 7 when the rotating disc 402 drives the sliding frame 403 to rise to a certain height due to the long-distance rotation of the limit post 404 when the rotating disc 402 drives the sliding frame 403 to rise to a certain height due to the slower rotation of the rotating disc 402 and the continuous rotation of the rotating disc 402, and the limit post 404 is in short-distance rotation at the moment, so that the sliding frame 403 is fast when falling, so that when the sliding frame 403 rises, the piston rod inside the sample injection needle 7 can be driven to slowly rise, through the conduction of the unidirectional liquid inlet valve tube 4016 and the insertion tube 4015, the solution which is injected into one side inside the liquid storage barrel 4013 in advance by the liquid supply tube 4019 is pumped into the sample injection needle 7, then when the sliding frame 403 is quickly lowered, the solution pumped in the sample injection needle 7 can be quickly extruded and discharged to the other side of the liquid storage barrel 4013 through the unidirectional liquid outlet valve tube 4017, and then is discharged through the discharge tube 4020, so that the whole can be subjected to the cleaning operation of slow pumping and quick discharging, the cleaning operation of the sample injection needle 7 can be completed through the repeated extrusion and discharge according to the mode, the whole pumping and extrusion cleaning effect is good, the cleaning is cleaner, the accuracy of the later detection result is ensured, the whole does not need to be manually operated, the sample injection needle 7 is not required to be detached, the operation is simple, the cleaning efficiency is improved. The structure of the injection needle 7 is the same as that of the existing injector, and the structure and principle thereof are not described herein. Different needle washing liquids need to be replaced before each sample injection to wash the sample injection needle 7, and no cross contamination between different samples can be ensured.
In this embodiment, the disengaging mechanism 5 includes a supporting block 501, a limiting frame 502, a roller rod 503 and a pressing plate 504, the two sides of the bottom of the limiting disk 4011 are symmetrically fixed with semicircular supporting blocks 501, the juncture of the two supporting blocks 501 is set as an arc slope, the mounting frame 3 is provided with the limiting frame 502 near one side of the liquid storage barrel 4013, the roller rod 503 is installed in a sliding manner on the limiting frame 502 in a lifting manner, the top of the roller rod 503 is rotatably provided with a roller, the roller end faces one side of the bottom of the supporting block 501, one side of the bottom of the roller rod 503 is fixed with the pressing plate 504, and the other side of the bottom of the pressing plate 504 is fixedly connected with the top of the liquid storage barrel 4013.
The disengaging mechanism 5 further comprises a slide 505, a slide block 506, a return spring 507, a telescopic rod 508 and a compression spring 509, wherein the upper side of the liquid storage barrel 4013 is provided with the arc-shaped slide 505, the slide 505 is arranged right above the partition plate 4014, the slide block 506 is slidably arranged on the slide 505, the plug barrel 4015 is fixedly connected with the slide block 506, the return spring 507 is arranged between the slide block 506 and any end of the slide block 505, the telescopic rod 508 is fixed between the bottom end of the liquid storage barrel 4013 and the outer shell 1, and the compression spring 509 is sleeved outside the telescopic rod 508.
As shown in fig. 8, fig. 9 and fig. 10, after the sample injection needle 7 is cleaned, the sliding frame 403 is lifted again to suck a certain amount of solution to be injected into the sample injection needle 7, then the motor two 4010 is started again, the limiting disc 4011 at the top end, the fixing frame 4012 and the sample injection needle 7 are driven to rotate again through the motor two 4010, the abutting block 501 at the bottom end of the limiting disc 4011 extrudes the roller of the roller rod 503 when the sample injection needle 7 rotates, the roller rod 503 moves downwards along the limiting frame 502, the pressing plate 504 is matched, so that the liquid storage barrel 4013 is extruded and descends, the insertion barrel 4015 is driven to slowly separate from the sample injection needle 7, after the abutting block 501 rotates and extrudes a certain degree, the sample injection needle 7 is completely separated from the insertion barrel 4015 at the moment, the sample injection needle 7 cannot abut against the side walls of the insertion barrel 4015 and the liquid storage barrel 4013 when rotating, the stability of the needle head can be ensured when rotating, and the situation that the needle head cannot be broken off and broken in time can be avoided.
Because the both sides of conflict piece 501 are circular-arc setting, therefore advance needle 7 has certain separation process when rotatory breaking away from cartridge 4015, can not directly go up straight and directly down the horse and break away from cartridge 4015 inside, and limit disk 4011 still can drive advance needle 7 rotatory this moment, cooperation slide 505 and slider 506's slip this moment for advance needle 7 rotatory in-process can drive slider 506 and cartridge 4015 along the inside rotatory certain distance of removal of slide 505, advance needle 7 and cartridge 4015 slowly take out to break away until completely breaking away from at rotatory in-process that removes, thereby ensure the smoothness of whole breaking away from, avoid advance needle 7 to appear conflicting damage, guarantee whole result of use. Both the slideway 505 and the partition 4014 are coaxially arranged with the limit plate 4011.
After the sample injection needle 7 is completely separated from the insertion barrel 4015, the original stretched reset spring 507 rebounds to drive the sliding block 506 and the insertion barrel 4015 to reset to the initial position of the slideway 505, so that the needle head at the bottom end of the subsequent sample injection needle 7 can be smoothly inserted into the insertion barrel 4015, the integral use effect is ensured, meanwhile, the compression spring 509 and the telescopic rod 508 at the bottom end of the liquid storage barrel 4013 also enable the liquid storage barrel 4013 to rebound and lift to reset, the subsequent reuse is convenient, the integral operation is smooth, the linkage is high, and the synchronous operation is realized.
In this embodiment, the pressing mechanism 6 includes a second magnet 601, an extrusion block 602 and a connecting frame 603, one side of the first magnet 408 is fixed with the second magnet 601 through a bracket, one side of the second magnet 601 far away from the first magnet 408 is fixed with the extrusion block 602, one side of the extrusion block 602 far away from the second magnet 601 is in an arc shape gradually approaching to the second magnet 601 from top to bottom, one side of the mounting frame 3 near the extrusion block 602 is provided with the connecting frame 603, the connecting frame 603 is in an inverted-L shape, and a roller matched with the extrusion block 602 is rotatably mounted at the end part of the horizontal part of the connecting frame 603; the pushing mechanism 6 further comprises a magnet III 604, auxiliary rods 605 and abutting springs 606, wherein the magnet III 604 is fixed on one side of the bottom end of the connecting frame 603, the horizontal auxiliary rods 605 are slidably arranged on one side of the vertical part of the extrusion block 602, the auxiliary rods 605 are arranged side by side and at intervals, the abutting springs 606 are sleeved outside the auxiliary rods 605, and the abutting springs 606 are arranged on one side, far away from the mounting frame 3, of the connecting frame 603; the pushing mechanism 6 further comprises a limiting rod 607, extrusion springs 608 and a second iron block 609, the second iron block 609 is fixed on one side of the top end of the sample injection needle 7, a plurality of limiting rods 607 are uniformly distributed around the sample injection needle 7 at intervals, the limiting rods 607 are arranged on the lower side of the second iron block 609, the lower ends of the limiting rods 607 are slidably connected with the fixing frame 4012, the extrusion springs 608 are sleeved outside the limiting rods 607, and two ends of each extrusion spring 608 are connected with the sample injection needle 7 and the fixing frame 4012 respectively.
Referring to fig. 4, 11 and 12, after the sample injection needle 7 is cleaned and reset by 180 degrees, the bottom end of the sample injection needle 7 is aligned to the sample injection port 2 again, the iron block two 609 is opposite to the magnet three 604 at the bottom end of the connecting frame 603, and the iron block two 609 and the sample injection needle 7 are pulled to descend synchronously as a whole due to the adsorption force of the magnet three 604, so that the needle at the bottom end of the sample injection needle 7 is automatically inserted into the sample injection port 2, the insertion positioning is completed, the accuracy and stability of the sample injection at the later stage are ensured, and the whole use effect is good, as shown in the left side of fig. 14.
When the needle at the bottom end of the sample injection needle 7 is inserted into the sample injection port 2, the motor I401 is started again at this time to drive the sliding frame 403 to descend, so that the piston rod at the top end of the sample injection needle 7 is abutted against, so that the piston rod descends, the solution to be injected originally pumped in the sample injection needle 7 is extruded into the sample injection port 2, the sample solution injection operation is completed, after the piston rod descends, extrusion block 602 extrudes one end of the connecting frame 603 at this time, so that the connecting frame 603 is moved by extrusion force, the magnet III 604 at the bottom end is driven to be separated from the iron block II 609, the suction force of the top end of the magnet III 604 is greatly reduced by staggering the iron block II, and at this time, the extrusion spring 608 rebounds to drive the sample injection needle 7 to be integrally lifted, so that the needle at the bottom end of the sample injection needle 7 is separated from the sample injection port 2, as shown in the right side of fig. 14, so that when the subsequent sample injection needle 7 rotates again, the needle 7 is prevented from abutting against the sample injection port 2, the smoothness of rotation is ensured, and the whole use effect is ensured.
Claims (10)
1. A gas chromatograph sample introduction apparatus, characterized in that: comprising
The device comprises an outer shell body (1), wherein a sample inlet (2) is arranged on one side of the top end of the outer shell body (1), a mounting frame (3) is fixed on one side, close to the sample inlet (2), of the outer shell body (1), and a sample injection needle (7) is longitudinally arranged on one side of the top end of the sample inlet (2);
The cleaning mechanism (4) is arranged on the mounting frame (3), and the cleaning mechanism (4) is used for automatically cleaning the sample injection needle (7);
The cleaning mechanism (4) comprises a rotating disc (402) and a liquid storage barrel (4013), the rotating disc (402) is rotatably arranged at the top end of the mounting frame (3), and the liquid storage barrel (4013) is arranged at one side, close to the rotating disc (402), of the outer shell (1);
A disengagement mechanism (5), wherein the disengagement mechanism (5) is arranged outside one side of the liquid storage barrel (4013);
The pushing mechanism (6) is arranged outside one side of the mounting frame (3) close to the sample inlet (2);
The cleaning mechanism (4) is matched with the operation of the separating mechanism (5), the cleaned sample injection needle (7) is rotated to be separated from the liquid storage barrel (4013) and is reset to the top end of the sample injection port (2), and the pushing mechanism (6) enables the needle head of the sample injection needle (7) to be inserted into the sample injection port (2).
2. The gas chromatograph sample introduction device according to claim 1, wherein: the cleaning mechanism is characterized in that the cleaning mechanism (4) further comprises a motor I (401), a sliding frame (403), a limiting column (404), a positioning column (405), a connecting block (406) and a limiting frame (407), wherein the motor I (401) is fixed on one side of the installation frame (3), the output end of the motor I (401) is fixedly connected with the rotating disc (402), the installation frame (3) is provided with the sliding frame (403) which is close to one side of the rotating disc (402) and can be lifted, one side edge of the rotating disc (402) is provided with the limiting column (404), the installation frame (3) is provided with the positioning column (405), the positioning column (405) is arranged on one side of the rotating disc (402), the limiting frame (407) is arranged on one side of the limiting column (404) and one side of the positioning column (405) in a sliding mode, one side of the sliding frame (403) is rotatably provided with the connecting block (406), and one end of the connecting block (406) is rotatably connected with the limiting frame (407).
3. The gas chromatograph sample introduction device according to claim 2, wherein: the cleaning mechanism is characterized in that the cleaning mechanism (4) further comprises a magnet I (408), an iron block I (409), a motor II (4010), a limiting disc (4011), a fixing frame (4012), a liquid storage barrel (4013) and a partition plate (4014), the magnet I (408) is externally fixed on one side of the bottom end of the sliding frame (403), the iron block I (409) is fixed on one side of the top end of the sample injection needle (7), the motor II (4010) is arranged on one side of the mounting frame (3), the limiting disc (4011) is fixed on an output shaft of the motor II (4010), the fixing frame (4012) is transversely fixed in the middle of the limiting disc (4011), the sample injection needle (7) is slidably mounted on the fixing frame (4012), and the arc-shaped partition plate (4014) is fixed in the liquid storage barrel (4013).
4. A gas chromatograph sample introduction device according to claim 3, wherein: the cleaning mechanism (4) further comprises an inserting cylinder (4015), a one-way liquid inlet valve pipe (4016) and a one-way liquid outlet valve pipe (4017), the top end of one side of the liquid storage cylinder (4013) close to the arc-shaped partition plate (4014) is provided with the inserting cylinder (4015), the two sides of the bottom end of the inserting cylinder (4015) are respectively provided with the one-way liquid inlet valve pipe (4016) and the one-way liquid outlet valve pipe (4017), and the bottoms of the one-way liquid inlet valve pipe (4016) and the one-way liquid outlet valve pipe (4017) are respectively arranged on the two sides of the arc-shaped partition plate (4014).
5. The gas chromatograph sample introduction device according to claim 4, wherein: the cleaning mechanism (4) further comprises a rubber ring (4018), a liquid supply pipe (4019) and a discharge pipe (4020), the rubber ring (4018) is fixed at the top end of the inserting cylinder (4015), the liquid supply pipe (4019) is installed at the bottom end of one side of the liquid storage barrel (4013) close to the one-way liquid inlet valve pipe (4016), and the discharge pipe (4020) is installed at the bottom end of one side of the liquid storage barrel (4013) close to the one-way liquid outlet valve pipe (4017).
6. The gas chromatograph sample introduction device according to claim 4, wherein: the utility model discloses a liquid storage barrel, including separating mechanism (5), including supporting piece (501), spacing (502), gyro wheel pole (503) and clamp plate (504), the bottom both sides symmetry of spacing dish (4011) is fixed with semicircle annular supporting piece (501), two the juncture of supporting piece (501) all sets up to the arc slope, one side that mounting bracket (3) is close to liquid storage barrel (4013) is fixed with spacing (502), install gyro wheel pole (503) on spacing (502) liftable, gyro wheel end orientation supporting piece (501) bottom one side of gyro wheel pole (503), the bottom of gyro wheel pole (503) is fixed with clamp plate (504), the bottom and liquid storage barrel (4013) fixed connection of clamp plate (504).
7. The gas chromatograph sample introduction device according to claim 6, wherein: the utility model discloses a liquid storage barrel, including baffle (4014), slide (4014) and slide (506), release mechanism (5) are including slide (505), slider (506), reset spring (507), telescopic link (508) and compression spring (509), the upside of liquid storage barrel (4013) is provided with slide (505) of arc shape, slide (505) set up directly over baffle (4014), slidable mounting has slider (506) on slide (505), insert section of thick bamboo (4015) and slider (506) fixed connection, install reset spring (507) between slider (506) and the arbitrary one end of slide (505), be fixed with telescopic link (508) between the bottom of liquid storage barrel (4013) and shell body (1), compression spring (509) are established to the outside cover of telescopic link (508).
8. A gas chromatograph sample introduction device according to claim 3, wherein: the pushing mechanism (6) comprises a magnet II (601), an extrusion block (602) and a connecting frame (603), wherein the magnet II (601) is fixed on one side of the magnet I (408), the extrusion block (602) is fixed on one side, far away from the magnet I (408), of the magnet II (601), the extrusion block (602) is arranged in an arc shape on one side, far away from the magnet II (601), of the mounting frame (3), the connecting frame (603) is arranged on one side, close to the extrusion block (602), of the mounting frame (3), the connecting frame (603) is arranged in an inverted L shape, and idler wheels matched with the extrusion block (602) are rotatably arranged on the end part of the horizontal part of the connecting frame (603).
9. The gas chromatograph sample introduction device according to claim 8, wherein: the pushing mechanism (6) further comprises a magnet III (604), an auxiliary rod (605) and a collision spring (606), wherein the magnet III (604) is fixed on one side of the bottom end of the vertical part of the connecting frame (603), the horizontal auxiliary rod (605) is slidably mounted on one side of the vertical part of the extrusion block (602), and the collision spring (606) is sleeved outside the auxiliary rod (605).
10. The gas chromatograph sample introduction device of claim 9, wherein: the pushing mechanism (6) further comprises a limiting rod (607), extrusion springs (608) and a second iron block (609), a plurality of limiting rods (607) are uniformly distributed around the sample injection needle (7) at intervals, the limiting rods (607) are arranged on the lower side of the second iron block (609), the lower ends of the limiting rods (607) are slidably connected with the fixing frame (4012), the extrusion springs (608) are sleeved outside the limiting rods (607), and the two ends of each extrusion spring (608) are connected with the sample injection needle (7) and the fixing frame (4012) respectively.
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| CN202410557659.0A CN118150746A (en) | 2024-05-08 | 2024-05-08 | Gas chromatograph sample leading-in device |
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| CN202410557659.0A CN118150746A (en) | 2024-05-08 | 2024-05-08 | Gas chromatograph sample leading-in device |
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