阅读说明：本技术 一种应用于气相色谱仪的自动标定装置及气相色谱仪 (Be applied to gas chromatograph's automatic calibration device and gas chromatograph ) 是由 王国军 王超 唐刚 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种应用于气相色谱仪的自动标定装置及气相色谱仪,自动标定装置包括气化室、色谱柱和检测器,气化室上连通有零气输入管、标气输入管和进样管,气化室通过色谱柱与检测器相连通,零气输入管上设置有更换装置；本发明通过伸缩干燥管能对零气中的水分进行干燥,通过更换装置能更换伸缩干燥管,更换时,先通过更换装置压缩正在使用的伸缩干燥管和其上方的一个伸缩干燥管,再通过更换装置推动全部伸缩干燥管,正在使用的伸缩干燥管被推出工作位置,使其与零气输入管分离,并将其上方的伸缩干燥管推入工作位置,使其与零气输入管连通,实现快速更换伸缩干燥管,避免更换伸缩干燥管时间过长导致杂质进入零气输入管内造成仪器故障。(The invention discloses an automatic calibration device applied to a gas chromatograph and the gas chromatograph, wherein the automatic calibration device comprises a gasification chamber, a chromatographic column and a detector, wherein the gasification chamber is communicated with a zero gas input pipe, a standard gas input pipe and a sample injection pipe; the invention can dry the moisture in the zero gas through the telescopic drying tube, and the telescopic drying tube can be replaced through the replacing device, when in replacement, the used telescopic drying tube and one telescopic drying tube above the same are compressed through the replacing device, and then all the telescopic drying tubes are pushed through the replacing device, the used telescopic drying tube is pushed out of the working position to be separated from the zero gas input tube, and the telescopic drying tube above the used telescopic drying tube is pushed into the working position to be communicated with the zero gas input tube, so that the telescopic drying tube can be replaced quickly, and the instrument fault caused by the fact that impurities enter the zero gas input tube due to overlong time for replacing the telescopic drying tube is avoided.)

1. The utility model provides an automatic calibration device for gas chromatograph, includes vaporizer, chromatographic column and detector, its characterized in that: the utility model discloses a drying device, including gasification chamber, zero gas input tube, mark gas input tube and sample inlet pipe, the intercommunication has zero gas input tube, mark gas input tube and advances kind pipe on the gasification chamber, the gasification chamber is linked together through chromatographic column and detector, be provided with the change device on the zero gas input tube, be provided with a plurality of flexible drying tubes in the change device, zero gas-supply pipe is linked together with one of them flexible drying tube, and this flexible drying tube contracts the back and separates with zero gas input tube, the change device makes flexible drying tube shrink through extruded mode, removes through the mode of propelling movement and changes flexible drying tube.

2. The automatic calibration device applied to the gas chromatograph of claim 1, wherein: the zero gas input pipe comprises a first zero gas pipe and a second zero gas pipe, the replacing device comprises an upper box body, a lower box body, a pushing mechanism, two compressing mechanisms and connecting pipes, the bottom end of the upper box body is fixedly provided with the lower box body, the upper box body is communicated with the lower box body, the two opposite side walls of the upper box body are fixedly provided with the connecting pipes, the first zero gas pipe is communicated with one of the connecting pipes, the second zero gas pipe is communicated with the other connecting pipe, two ends of one telescopic drying pipe are respectively communicated with the two connecting pipes, the pushing mechanism is arranged at the top of an inner cavity of the upper box body, the two compressing mechanisms are respectively and fixedly arranged on the two opposite side walls of the upper box body, and the two compressing mechanisms are respectively positioned right above the two connecting pipes.

3. The automatic calibration device applied to the gas chromatograph according to claim 2, wherein: the connecting pipe sets up to loudspeaker form, just the inner wall fixed mounting of connecting pipe has the sealing washer.

4. The automatic calibration device applied to the gas chromatograph according to claim 2, wherein: push mechanism includes push rod, slide, first spring, push pedal and pressure disk, slide slidable mounting is in the top of last box body inner chamber, the top fixed mounting of slide has the push rod, the top of push rod extends to the top of supreme box body, just the top fixed mounting of push rod has the pressure disk, the bottom fixed mounting of slide has first spring, the bottom fixedly connected with push pedal of first spring.

5. The automatic calibration device applied to the gas chromatograph according to claim 4, wherein: the pushing mechanism further comprises two first piston cylinders, the first piston cylinders are fixedly mounted at the top ends of the push plates, and the output ends of the first piston cylinders are fixedly connected with the bottom ends of the sliding plates.

6. The automatic calibration device applied to the gas chromatograph according to claim 5, wherein: compressing mechanism includes second piston cylinder, clamp plate and gas-supply pipe, second piston cylinder fixed mounting is in the lateral wall of last box body, just the second piston cylinder is located the connecting pipe directly over, the output of second piston cylinder runs through the lateral wall of last box body, just the output fixed mounting of second piston cylinder has the clamp plate, the one end of gas-supply pipe is linked together with the one end that the clamp plate was kept away from to the second piston cylinder, the other end of gas-supply pipe is linked together with the bottom of first piston cylinder, the flexible state of the output of first piston cylinder and the output of second piston cylinder is opposite.

7. The automatic calibration device applied to the gas chromatograph of claim 1, wherein: flexible drying tube includes first drying tube, second drying tube, flexible pipe and elastic connection spare, first drying tube and second drying tube are linked together through the flexible pipe, the one end that the flexible pipe was kept away from to first drying tube and second drying tube all sets up to sharp-pointed form, it is provided with a plurality of elastic connection spare to be connected between first drying tube and the second drying tube, the equal fixed mounting in top of first drying tube and second drying tube has last backup pad, the equal fixed mounting in bottom of first drying tube and second drying tube has the bottom suspension fagging, two go up the backup pad and keep away from the distance between the lateral wall of flexible pipe and be less than two the distance between the lateral wall that the bottom suspension fagging is close to the flexible pipe.

8. The automatic calibration device applied to the gas chromatograph of claim 7, wherein: the elastic connecting piece comprises a sleeve, a second spring and a guide pillar, the second spring is fixedly installed in the sleeve, the guide pillar is installed in the sleeve in a sliding mode, one end, located in the sleeve, of the guide pillar is fixedly connected with the second spring, one end, far away from the second drying pipe, of the sleeve is fixedly connected with the first drying pipe, and one end, far away from the first drying pipe, of the guide pillar is fixedly connected with the second drying pipe.

9. A gas chromatograph including a housing and the automatic calibration device of any one of claims 1-8, wherein: automatic calibration device fixed mounting is in one side on casing top, the top of casing front wall is rotated and is installed first baffle, the casing rotates at the lateral wall that is close to first baffle and installs the second baffle, fixed mounting has the motor in the casing, the motor is located between first baffle and the second baffle, just the height that highly is higher than first baffle and second baffle of motor, the output fixed mounting of motor has the rope winding wheel, the rope winding wheel passes through the haulage rope and is connected with the second baffle drive, the lateral wall fixed mounting that the motor was kept away from to the rope winding wheel has V-arrangement pole, the one end that the rope winding wheel was kept away from to the V-arrangement pole is passed through hinge and is connected with first baffle drive.

Technical Field

The invention relates to the technical field of gas analysis and instruments, in particular to an automatic calibration device applied to a gas chromatograph and the gas chromatograph.

Background

The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology. The method can be used for analyzing heat-stable organic matters with the boiling point not more than 500 ℃ in soil, such as volatile organic matters, organic chlorine, organic phosphorus, polycyclic aromatic hydrocarbons, phthalate esters and the like.

Chinese patent CN107490644A discloses an automatic calibration device and a gas chromatograph. The automatic calibration device comprises an eight-way reversing valve, an adsorption analysis pipe, a sample air inlet gas circuit, a standard air inlet gas circuit and a detector, wherein an eighth interface of the eight-way reversing valve is respectively connected with an air outlet of the sample air inlet gas circuit and an air outlet of the standard air inlet gas circuit, a sixth interface and a seventh interface of the eight-way reversing valve are communicated with an air inlet of the adsorption analysis pipe, a second interface and a third interface of the eight-way reversing valve are communicated with the air outlet of the adsorption analysis pipe, and a fourth interface of the eight-way reversing valve is communicated with the air inlet of the detector. The gas chromatograph comprises the device. The automatic calibration device simplifies the gas path, further reduces the volume of the chromatograph, realizes the automatic calibration of the equipment, and does not need manual regular calibration.

But this equipment just needs to change the silica gel drying tube after using a period, need unscrew the connector of silica gel drying tube during the change, takes off the silica gel drying tube again and changes, and the change process is comparatively troublesome, and because pipeline and not having communicated during the change, impurity in the external world probably gets into in the pipeline, probably leads to the instrument to break down.

Therefore, it is necessary to provide an automatic calibration device applied to a gas chromatograph and a gas chromatograph to solve the above technical problems.

Disclosure of Invention

The invention aims to provide an automatic calibration device applied to a gas chromatograph and the gas chromatograph, and aims to solve the problem that the existing automatic calibration device applied to the gas chromatograph and the gas chromatograph in the background art are inconvenient to replace a drying pipe.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automatic calibration device for gas chromatograph, includes vaporizer, chromatographic column and detector, the intercommunication has zero gas input tube, mark gas input tube and advances appearance pipe on the vaporizer, the vaporizer is linked together through chromatographic column and detector, be provided with the change device on the zero gas input tube, be provided with a plurality of flexible drying tube in the change device, zero gas-supply pipe is linked together with one of them flexible drying tube, and this flexible drying tube contracts the back and separates with zero gas input tube, the change device makes flexible drying tube shrink through extruded mode, removes through the mode of propelling movement and changes flexible drying tube.

When the device is used, components in the zero gas can be separated through the chromatographic column, the components in the zero gas can be detected through the detector, when the calibration is carried out, the zero gas is firstly input into the gasification chamber and is input into the detector through the chromatographic column, the data detected by the detector should be zero because the zero gas does not contain the detected components, then the standard gas is input into the detector, the standard gas is gas containing specific components, the data detected by the detector should be consistent with the numerical value of the content of each component in the standard gas, when the detected numerical values of the zero gas and the standard gas are accurate, the calibration of the gas chromatograph is finished, when the detected numerical value is not accurate, the parameters of the detector are adjusted to be consistent, the moisture in the zero gas can be dried through the telescopic drying tube, the telescopic drying tube can be replaced through the replacing device, the telescopic drying tube which is in use and the telescopic drying tube above the telescopic drying tube are compressed through the replacing device firstly, the rethread is changed the device and is promoted whole flexible drying tube, and the flexible drying tube that is using is released the operating position, makes its and the zero gas input tube separation to push the flexible drying tube of its top operating position, make its and zero gas input tube intercommunication, realize changing flexible drying tube fast, avoid changing flexible drying tube time overlength and lead to impurity to get into and cause the instrument trouble in the zero gas input tube.

As a further aspect of the invention, the zero gas input tube comprises a first zero gas tube and a second zero gas tube, the replacing device comprises an upper box body, a lower box body, a pushing mechanism, a compressing mechanism and a connecting pipe, wherein the lower box body is fixedly arranged at the bottom end of the upper box body, the upper box body is communicated with the lower box body, connecting pipes are fixedly arranged on two opposite side walls of the upper box body, the first zero air pipe is communicated with one connecting pipe, the second zero air pipe is communicated with the other connecting pipe, two ends of one of the telescopic drying tubes are respectively communicated with two connecting tubes, the pushing mechanism is arranged at the top of the inner cavity of the upper box body, the two compression mechanisms are fixedly arranged on the two opposite side walls of the upper box body respectively and are positioned right above the two connecting pipes respectively.

During specific use, can compress flexible drying tube through compression mechanism, can promote flexible drying tube downstream through push mechanism to realize the change of flexible drying tube.

As a further aspect of the present invention, the connection pipe is formed in a horn shape, and a seal ring is fixedly installed on an inner wall of the connection pipe.

During specific use, the connecting pipe is arranged to be horn-shaped, so that the two ends of the telescopic drying pipe can be inserted into the connecting pipe conveniently.

As a further scheme of the invention, the pushing mechanism comprises a push rod, a sliding plate, a first spring, a push plate and a pressure plate, the sliding plate is slidably mounted at the top of an inner cavity of the upper box body, the top end of the sliding plate is fixedly provided with the push rod, the top end of the push rod extends to the upper part of the upper box body, the top end of the push rod is fixedly provided with the pressure plate, the bottom end of the sliding plate is fixedly provided with the first spring, and the bottom end of the first spring is fixedly connected with the push plate.

During specific use, when the flexible drying tube needs to be replaced, the pressure plate is pressed at first, the pressure plate drives the sliding plate to move downwards through the push rod, the sliding plate drives the first spring to compress when moving downwards, and the flexible drying tube is pushed to move downwards after resilience of the first spring.

As a further scheme of the invention, the pushing mechanism further comprises two first piston cylinders, the two first piston cylinders are fixedly arranged at the top end of the push plate, the output end of each first piston cylinder is fixedly connected with the bottom end of the sliding plate, the compression mechanism comprises a second piston cylinder, a pressing plate and a gas pipe, the second piston cylinder is fixedly arranged on the side wall of the upper box body and is positioned right above the connecting pipe, the output end of the second piston cylinder penetrates through the side wall of the upper box body, the pressing plate is fixedly arranged at the output end of the second piston cylinder, one end of the gas pipe is communicated with one end, far away from the pressing plate, of the second piston cylinder, the other end of the gas pipe is communicated with the bottom of the first piston cylinder, and the output ends of the first piston cylinders and the second piston cylinders are opposite in telescopic state.

When the drying device is used, the pressure plate drives the sliding plate to move downwards through the push rod, the sliding plate drives the first spring to compress when moving downwards, meanwhile, the output end of the first piston cylinder is driven to contract, gas in the first piston cylinder is input into the second piston cylinder through the gas pipe, the output end of the second piston cylinder extends out, and therefore the pressure plate is pushed to move, the two pressure plates compress the telescopic drying pipes between the two piston cylinders, meanwhile, the telescopic drying pipes below the telescopic drying pipes are driven to compress when the telescopic drying pipes are compressed, the telescopic drying pipes below the telescopic drying pipes are separated from the two connecting pipes after being compressed, the push plate moves downwards under the elastic force of the first spring so as to push all the telescopic drying pipes to move downwards, the telescopic drying pipes located at the working positions fall into the lower box body, the telescopic drying pipes above the telescopic drying pipes move between the two connecting pipes, and extend under the action of the elastic force of the first spring, make its both ends get into in the connecting pipe to with two connecting pipe intercommunications, simultaneously, when the push pedal moves down, the output of first piston cylinder stretches out, thereby in inhaling the first piston cylinder through the gas-supply pipe with the gas in the second piston cylinder, make the output shrink of second piston cylinder, thereby realize resetting of clamp plate.

As a further scheme of the present invention, the telescopic drying tube includes a first drying tube, a second drying tube, a flexible tube and an elastic connector, the first drying tube and the second drying tube are communicated with each other through the flexible tube, ends of the first drying tube and the second drying tube, which are far away from the flexible tube, are both provided with sharp shapes, a plurality of elastic connectors are connected between the first drying tube and the second drying tube, top ends of the first drying tube and the second drying tube are both fixedly provided with an upper support plate, bottom ends of the first drying tube and the second drying tube are both fixedly provided with a lower support plate, and a distance between side walls of the two upper support plates, which are far away from the flexible tube, is smaller than a distance between side walls of the two lower support plates, which are close to the flexible tube.

During specific use, under flexible pipe and elastic connection spare's effect, first drying tube and second drying tube can be close to each other or keep away from, and first drying tube and second drying tube receive when exogenic action is close to each other, elastic connection spare is in the compression state, lose the exogenic action back, under elastic connection spare's elasticity effect, first drying tube and second drying tube are kept away from each other, because two go up the backup pad and lie in between two nearest lower support plates, can drive the synchronous shrink of flexible drying tube of its below when making the flexible drying tube shrink of top.

As a further aspect of the present invention, the elastic connection member includes a sleeve, a second spring, and a guide post, the second spring is fixedly installed in the sleeve, the guide post is slidably installed in the sleeve, one end of the guide post located in the sleeve is fixedly connected to the second spring, one end of the sleeve away from the second drying pipe is fixedly connected to the first drying pipe, and one end of the guide post away from the first drying pipe is fixedly connected to the second drying pipe.

When the guide post is used specifically, the guide post can slide relative to the sleeve, and under the action of the second spring, the guide post can be popped out from the sleeve when not being acted by external force.

The invention also relates to a gas chromatograph, which comprises a shell and the automatic calibration device, wherein the automatic calibration device is fixedly arranged on one side of the top end of the shell, a first baffle plate is rotatably arranged at the top of the front wall of the shell, a second baffle plate is rotatably arranged on the side wall of the shell close to the first baffle plate, a motor is fixedly arranged in the shell, the motor is positioned between the first baffle plate and the second baffle plate, the height of the motor is higher than that of the first baffle plate and that of the second baffle plate, a rope winding wheel is fixedly arranged at the output end of the motor, the rope winding wheel is in driving connection with the second baffle plate through a traction rope, a V-shaped rod is fixedly arranged on the side wall of the rope winding wheel far away from the motor, and one end of the V-shaped rod far away from the rope winding wheel is in driving connection with the first baffle plate through a hinge.

When the telescopic drying tube is used specifically, the output end of the motor drives the rope winding wheel to rotate, the traction rope is wound on the rope winding wheel, the second baffle is pulled to be opened by the traction rope, meanwhile, the rope winding wheel drives the V-shaped rod to rotate when rotating, the first baffle is pushed open by the hinge when the V-shaped rod rotates, and then a new telescopic drying tube can be placed into the upper box body.

As a further scheme of the invention, a switch is fixedly mounted at the top end of the shell, the switch is electrically connected with the motor, the pressure plate is positioned above the shell, and the switch is positioned below the pressure plate.

When the telescopic drying tube is used up, the pressure plate just contacts the switch when the pressure plate is pressed down, and the motor is started after the switch is pressed.

The working principle is as follows: when the telescopic drying tube needs to be replaced, firstly, a pressure plate is pressed, the pressure plate drives a sliding plate to move downwards through a push rod, the sliding plate drives a first spring to compress when moving downwards, and simultaneously, the output end of a first piston cylinder is driven to contract, so that the gas in the first piston cylinder is input into a second piston cylinder through a gas pipe, and the output end of the second piston cylinder extends out, thereby pushing a pressure plate to move, two pressure plates compress the telescopic drying tube between the two pressure plates, meanwhile, the telescopic drying tube below the telescopic drying tube is driven to compress when the telescopic drying tube compresses, the telescopic drying tube below the telescopic drying tube is separated from two connecting pipes after compressing, after the telescopic drying tube is separated from the connecting pipes, a push plate moves downwards under the elastic force of the first spring, thereby pushing all the telescopic drying tubes to move downwards, so that the telescopic drying tube at the working position drops into a lower box body, and the telescopic drying tube above the telescopic drying tube moves between the two connecting pipes, and extend under the effect of self elasticity, make its both ends get into in the connecting pipe to with two connecting pipe intercommunications, simultaneously, when the push pedal moves down, the output of first piston cylinder stretches out, thereby in inhaling the first piston cylinder through the gas-supply pipe with the gas in the second piston cylinder, make the output of second piston cylinder shrink, thereby realize resetting of clamp plate.

The invention relates to an automatic calibration device applied to a gas chromatograph and the gas chromatograph, wherein moisture in zero gas can be dried through a telescopic drying tube, the telescopic drying tube can be replaced through a replacing device, the used telescopic drying tube and one telescopic drying tube above the telescopic drying tube are compressed through the replacing device during replacement, all the telescopic drying tubes are pushed through the replacing device, the used telescopic drying tube is pushed out of a working position to be separated from a zero gas input tube, the telescopic drying tube above the telescopic drying tube is pushed into the working position to be communicated with the zero gas input tube, the telescopic drying tube is replaced quickly, and the problem that impurities enter the zero gas input tube to cause instrument faults due to overlong time for replacing the telescopic drying tube is avoided.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic three-dimensional structure of a gas chromatograph according to the present invention;

FIG. 2 is a schematic diagram of the automatic calibration apparatus of the present invention;

FIG. 3 is a schematic cross-sectional view of the automatic calibration device of the present invention;

FIG. 4 is an enlarged schematic view of FIG. 3 at A according to the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 3B according to the present invention;

FIG. 6 is a schematic sectional view of the telescopic drying duct of the present invention;

FIG. 7 is a schematic sectional view of the elastic connecting member of the present invention;

FIG. 8 is a schematic diagram of a side view cross-sectional configuration of a gas chromatograph in accordance with the present invention;

FIG. 9 is an enlarged view of FIG. 8 at C in accordance with the present invention;

fig. 10 is an enlarged view of fig. 9 at D according to the present invention.

In the figure: 1. a gasification chamber; 2. a zero gas input pipe; 21. a first zero gas pipe; 22. a second zero gas pipe; 3. replacing the device; 31. an upper box body; 32. a lower box body; 33. a pushing mechanism; 331. a push rod; 332. a slide plate; 333. a first spring; 334. pushing the plate; 335. a platen; 336. a first piston cylinder; 34. a compression mechanism; 341. a second piston cylinder; 342. pressing a plate; 343. a gas delivery pipe; 35. a connecting pipe; 36. a seal ring; 4. a chromatographic column; 5. a detector; 6. a telescopic drying tube; 61. a first drying duct; 62. a second drying duct; 63. a flexible tube; 64. an elastic connecting member; 641. a sleeve; 642. a second spring; 643. a guide post; 65. an upper support plate; 66. a lower support plate; 7. a standard gas input pipe; 8. a sample inlet pipe; 9. a switch; 10. a housing; 11. a first baffle plate; 12. a second baffle; 13. a motor; 14. a rope winding wheel; 15. a hauling rope; 16. a V-shaped rod; 17. and (4) a hinge.

Detailed Description

As shown in fig. 1 to 3, an automatic calibration device applied to a gas chromatograph includes a vaporizing chamber 1, a chromatographic column 4 and a detector 5, the vaporizing chamber 1 is communicated with a zero gas input tube 2, a standard gas input tube 7 and a sample injection tube 8, the vaporizing chamber 1 is communicated with the detector 5 through the chromatographic column 4, a replacing device 3 is arranged on the zero gas input tube 2, a plurality of telescopic drying tubes 6 are arranged in the replacing device 3, the telescopic drying tubes 6 can be separated from the zero gas input tube 2 after being contracted, and the telescopic drying tubes 6 are replaced by the replacing device 3 in an extruding and pushing manner.

When the device is used, components in the zero gas can be separated through the chromatographic column 4, the components in the zero gas can be detected through the detector 5, when the calibration is carried out, the zero gas is firstly input into the gasification chamber 1, the zero gas is input into the detector 5 through the chromatographic column 4, the data detected by the detector 5 is zero because the zero gas does not contain the detected components, then the standard gas is input into the detector 5, the standard gas is a gas containing specific components, the data detected by the detector 5 is consistent with the content value of each component in the standard gas, when the detected values of the zero gas and the standard gas are accurate, the calibration of the gas chromatograph is finished, when the detected values are inaccurate, the parameters of the detector 5 are adjusted to be consistent, the moisture in the zero gas can be dried through the telescopic drying tube 6, the telescopic drying tube 6 can be replaced through the replacing device 3, when the replacing device 3 is used, the telescopic drying tube 6 and the telescopic drying tube 6 above the telescopic drying tube are compressed, rethread is changed device 3 and is promoted whole flexible drying tube 6, and the flexible drying tube 6 that is using is released the operating position, makes its and the separation of zero gas input tube 2 to push into operating position with the flexible drying tube 6 of its top, make its and the intercommunication of zero gas input tube 2, realize changing flexible drying tube 6 fast, avoid changing flexible drying tube 6 time overlength and lead to impurity to get into and cause the instrument trouble in the zero gas input tube 2.

As shown in fig. 3 to 9, the zero gas input pipe 2 includes a first zero gas pipe 21 and a second zero gas pipe 22, the replacing device 3 comprises an upper box body 31, a lower box body 32, a pushing mechanism 33, a compressing mechanism 34 and a connecting pipe 35, wherein the lower box body 32 is fixedly arranged at the bottom end of the upper box body 31, the upper box body 31 is communicated with the lower box body 32, connecting pipes 35 are fixedly arranged on two opposite side walls of the upper box body 31, the first zero air pipe 21 is communicated with one of the connecting pipes 35, the second zero air pipe 22 is communicated with the other connecting pipe 35, two ends of one of the telescopic drying tubes 6 are respectively communicated with two connecting tubes 35, the pushing mechanism 33 is arranged at the top of the inner cavity of the upper box body 31, the number of the compression mechanisms 34 is two, the two compression mechanisms 34 are respectively and fixedly mounted on two opposite side walls of the upper box body 31, and the two compression mechanisms 34 are respectively located right above the two connecting pipes 35.

The connecting pipe 35 is horn-shaped, and a sealing ring 36 is fixedly mounted on the inner wall of the connecting pipe 35.

Push mechanism 33 includes push rod 331, slide 332, first spring 333, push pedal 334, pressure plate 335 and first piston cylinder 336, slide 332 slidable mounting is in the top of last box body 31 inner chamber, the top fixed mounting of slide 332 has push rod 331, the top of push rod 331 extends to the top of last box body 31, just the top fixed mounting of push rod 331 has pressure plate 335, the bottom fixed mounting of slide 332 has first spring 333, the bottom fixed connection of first spring 333 has push pedal 334, first piston cylinder 336 is provided with two, just first piston cylinder 336 fixed mounting is in the top of push pedal 334, the output of first piston cylinder 336 and the bottom fixed connection of slide 332.

The compression mechanism 34 comprises a second piston cylinder 341, a pressure plate 342 and a gas pipe 343, the second piston cylinder 341 is fixedly mounted on the side wall of the upper box body 31, the second piston cylinder 341 is positioned right above the connecting pipe 35, the output end of the second piston cylinder 341 penetrates through the side wall of the upper box body 31, the pressure plate 342 is fixedly mounted at the output end of the second piston cylinder 341, one end of the gas pipe 343 is communicated with one end of the second piston cylinder 341, which is far away from the pressure plate 342, the other end of the gas pipe 343 is communicated with the bottom of the first piston cylinder 336, the expansion and contraction states of the output end of the first piston cylinder 336 and the output end of the second piston cylinder 341 are opposite, namely, when the output end of the first piston cylinder 336 expands and contracts, the output end of the second piston cylinder 341 is in a contraction state, and when the output end of the first piston cylinder 336 extends, the output end of the second piston cylinder 341 is in an extension state.

When the telescopic drying tube 6 is needed to be replaced, firstly, the pressure plate 335 is pressed, the pressure plate 335 drives the sliding plate 332 to move downwards through the push rod 331, the sliding plate 332 drives the first spring 333 to compress when moving downwards, and simultaneously, the output end of the first piston cylinder 336 is driven to contract, so that the gas in the first piston cylinder 336 is input into the second piston cylinder 341 through the gas pipe 343, so that the output end of the second piston cylinder 341 extends, and the pressure plate 342 is pushed to move, the two pressure plates 342 compress the telescopic drying tube 6 between the two pressure plates, and simultaneously, the telescopic drying tube 6 drives the telescopic drying tube 6 below the telescopic drying tube to compress when compressing, the telescopic drying tube 6 below the telescopic drying tube is separated from the two connecting pipes 35 after compressing, after the telescopic drying tube 6 is separated from the connecting pipes 35, the push plate 334 moves downwards under the elastic force of the first spring 333, so as to push all the telescopic drying tubes 6 to move downwards, so that the telescopic drying tubes 6 at the working position fall into the lower box body 32, the flexible dry tube 6 of its top removes to between two connecting pipes 35, and extend under the effect of self elasticity, make its both ends get into in the connecting pipe 35, thereby communicate two connecting pipes 35, and simultaneously, when push pedal 334 moves down, the output of first piston cylinder 336 stretches out, thereby inhale in the first piston cylinder 336 through the gas-supply pipe 343 with the gas in the second piston cylinder 341, make the output shrink of second piston cylinder 341, thereby realize the reseing of clamp plate 342, only through pressing pressure disk 335 just can realize the compression and the propelling movement of flexible dry tube 6, the operation is thus simple, the change speed of flexible dry tube 6 has been improved.

As shown in fig. 6 and 7, the telescopic drying duct 6 includes a first drying duct 61, a second drying duct 62, a flexible duct 63, and an elastic connector 64, the first drying duct 61 and the second drying duct 62 are preferably silica gel drying ducts, the first drying pipe 61 and the second drying pipe 62 are communicated through a flexible pipe 63, the ends of the first drying pipe 61 and the second drying pipe 62 far away from the flexible pipe 63 are both arranged to be sharp, a plurality of elastic connecting pieces 64 are connected between the first drying pipe 61 and the second drying pipe 62, the top ends of the first drying pipe 61 and the second drying pipe 62 are fixedly provided with an upper support plate 65, the bottom ends of the first drying pipe 61 and the second drying pipe 62 are fixedly provided with lower support plates 66, and the distance between the side walls of the upper support plates 65 far away from the flexible pipe 63 is less than two, and the distance between the side walls of the lower support plates 66 close to the flexible pipe 63 is less than two.

The elastic connection element 64 includes a sleeve 641, a second spring 642, and a guide post 643, wherein the second spring 642 is fixedly installed in the sleeve 641, the guide post 643 is slidably installed in the sleeve 641, one end of the guide post 643 located in the sleeve 641 is fixedly connected to the second spring 642, one end of the sleeve 641 away from the second drying pipe 62 is fixedly connected to the first drying pipe 61, and one end of the guide post 643 away from the first drying pipe 61 is fixedly connected to the second drying pipe 62.

During specific use, under the effect of flexible pipe 63 and elastic connection spare 64, first drying tube 61 and second drying tube 62 can be close to each other or keep away from, and first drying tube 61 and second drying tube 62 receive when external force action is close to each other, elastic connection spare 64 is in the compression state, lose the external force action back, under elastic connection spare 64's elasticity effect, first drying tube 61 and second drying tube 62 keep away from each other, because two last backup pad 65 are located between two nearest lower support plate 66, can drive the synchronous shrink of flexible drying tube 6 below its when making the flexible drying tube 6 shrink of top.

As shown in fig. 8 to 10, a gas chromatograph includes a housing 10 and the above-mentioned automatic calibration device, the automatic calibration device is fixedly arranged at one side of the top end of the shell 10, a first baffle plate 11 is rotatably arranged at the top of the front wall of the shell 10, a second baffle plate 12 is rotatably installed on the side wall of the shell 10 close to the first baffle plate 11, a motor 13 is fixedly installed in the shell 10, the motor 13 is positioned between the first baffle plate 11 and the second baffle plate 12, and the height of the motor 13 is higher than that of the first baffle 11 and the second baffle 12, the output end of the motor 13 is fixedly provided with a rope winding wheel 14, the rope winding wheel 14 is in driving connection with the second baffle 12 through a traction rope 15, a V-shaped rod 16 is fixedly arranged on the side wall of the rope winding wheel 14 far away from the motor 13, the end of the V-shaped lever 16 remote from the rope winding wheel 14 is drivingly connected to the first flap 11 by a hinge 17.

The top fixed mounting of casing 10 has switch 9, switch 9 and motor 13 electric connection, pressure disk 335 is located the top of casing 10, switch 9 is located the below of pressure disk 335.

When specifically using, after the flexible drying tube 6 of deposit used up in last box body 31, press disc 335 just contacts switch 9 when pushing down press disc 335, switch 9 opens motor 13 after the pressurized, the output of motor 13 drives the rotation of rope winding wheel 14, make haulage rope 15 twine on rope winding wheel 14, haulage rope 15 pulling second baffle 12 is opened, and simultaneously, it is rotatory to drive V-arrangement pole 16 when rope winding wheel 14 is rotatory, 16 backs up first baffle 11 through hinge 17 when rotatory in V-arrangement pole, then can put into last box body 31 with new flexible drying tube 6, can make the flexible drying tube 6 of deposit in last box body 31 use up the back and open first baffle 11 and second baffle 12 automatically, avoid forgetting to add flexible drying tube 6, the convenience of using has been improved.

The working principle is as follows: when the telescopic drying tubes 6 need to be replaced, firstly, the pressure plate 335 is pressed, the pressure plate 335 drives the sliding plate 332 to move downwards through the push rod 331, the sliding plate 332 drives the first spring 333 to compress when moving downwards, and simultaneously, the output end of the first piston cylinder 336 is driven to contract, so that the gas in the first piston cylinder 336 is input into the second piston cylinder 341 through the gas pipe 343, the output end of the second piston cylinder 341 extends out, thereby pushing the pressure plates 342 to move, the two pressure plates 342 compress the telescopic drying tubes 6 between the two pressure plates, meanwhile, the telescopic drying tubes 6 below the telescopic drying tubes 6 are driven to compress when compressing, the telescopic drying tubes 6 below the telescopic drying tubes 6 are separated from the two connecting pipes 35 after compressing, after the telescopic drying tubes 6 are separated from the connecting pipes 35, the push plate 334 moves downwards under the elastic force of the first spring 333, thereby pushing all the telescopic drying tubes 6 to move downwards, so that the telescopic drying tubes 6 located at the working position fall into the lower box body 32, the telescopic drying tube 6 above the telescopic drying tube moves to a position between two connecting tubes 35 and extends under the action of self elasticity to enable two ends of the telescopic drying tube to enter the connecting tubes 35, so that the two connecting tubes 35 are communicated, meanwhile, when the push plate 334 moves downwards, the output end of the first piston cylinder 336 extends out, so that the gas in the second piston cylinder 341 is sucked into the first piston cylinder 336 through the gas pipe 343, the output end of the second piston cylinder 341 is contracted, so that the pressing plate 342 is reset, under the action of the flexible tube 63 and the elastic connecting piece 64, the first drying tube 61 and the second drying tube 62 can be close to or far away from each other, and when the first drying tube 61 and the second drying tube 62 are close to each other under the action of external force, the elastic connecting piece 64 is in a compression state, after the action of the external force is lost, the first drying tube 61 and the second drying tube 62 are far away from each other under the action of the elastic connecting piece 64, and because the two upper support plates 65 are positioned between the two nearest lower support plates 66, make the synchronous shrink of flexible drying tube 6 that can drive its below during the flexible drying tube 6 shrink of top, flexible drying tube 6 when last box body 31 internal storage is used up the back, pressure disk 335 just contacts switch 9 when pushing down pressure disk 335, switch 9 opens motor 13 after being pressed, the output of motor 13 drives the rope sheave 14 rotation, make haulage rope 15 winding on rope sheave 14, haulage rope 15 pulling second baffle 12 is opened, and simultaneously, it is rotatory to drive V-arrangement pole 16 when rope sheave 14 rotates, it backs up first baffle 11 through hinge 17 to open when V-arrangement pole 16 is rotatory, then can put into box body 31 with new flexible drying tube 6, can make flexible drying tube 6 of interior storage of last box body 31 use up the back and open first baffle 11 and second baffle 12 automatically through this structure, avoid forgetting to add flexible drying tube 6, the convenience of using has been improved.