CN214622477U - Thermal desorption binary channels sample cell transfer system - Google Patents

Abstract

The utility model discloses a thermal desorption binary channels sample cell transmission system solves taking off, wearing the cap, loading and transmitting the problem of multichannel sample cell. One side of the sample plate is provided with at least one sample tube output interface opposite to a coaxial tube lifting seat interface below the sample plate, the tube lifting seat interface is connected with an air passage of the tube lifting seat interface, a horizontal in-and-out space of a sample tube heater is arranged between the sample tube output interface and the tube lifting seat interface, the sample tube heater is in horizontal transmission connection with a driver, one side of the sample tube heater is provided with a manipulator rotation center, a tube clamp of the manipulator rotates at an angle of 90 degrees anticlockwise and is vertically coaxial with a tube cap clamp of a cap removing and wearing cap frame, a tube taking position of the manipulator is set at the manipulator rotation center, an intersection point of a connecting line of two points in the center of the sample plate and a circumference where a sample tube on the sample plate is located, and the manipulator rotates to enable the tube clamp center arranged on the manipulator to rotate to a straight line of a connecting line of the rotation center and the center of the sample plate 1.

Description

Thermal desorption binary channels sample cell transfer system

Technical Field

The utility model relates to a thermal desorption sample cell that is equipped with the adsorbent that the detected material will pass through is relevant.

Background

The thermal desorption is also called thermal desorption and is important pretreatment equipment for detecting air quality, and volatile and semi-volatile organic compounds in air by using a gas chromatograph. Because the content of volatile and semi-volatile organic compounds in the air is very low, the sensitivity of a general gas chromatograph cannot meet the requirement, but people breathe at any time although the content is very low, the accumulated amount is very large, and the detection is necessary. Therefore, a sample tube filled with an adsorbent is needed to adsorb and concentrate a substance to be detected, and then sample injection is carried out through thermal desorption, but the sample tube has a large volume, the speed of directly desorbing a component to be detected is slow, the resolution of an obtained chromatographic peak is low, the requirement of the resolution of a capillary chromatographic column cannot be met, the component of the sample tube needs to be desorbed and then enters a low-temperature cold trap tube for focusing, desorption and sample injection, and the resolution of the chromatographic peak is obtained.

Because the quality of the inside filler of sample tube is very big to sampling and testing result influence, require to protect inside filler also to guarantee the testing result simultaneously when desorbing the sample tube, need at first sweep sample tube inside air and moisture, so the sample tube gets into the gas circuit connection at desorption passageway and both ends and is very important, generally has two kinds of modes on the market: a kind of time sample tube is inserted into the gas circuit interface of both ends, the exit end is heated to the whole sample introduction flow path, both ends adopt the O-ring seal, the carrier gas passes the exit end and backflows the sample tube, can clear away the intraductal air well, make the intraductal packing of sample not oxidized under the high temperature; the other method is that the two ends of the sample tube are sealed by rubber pads relatively simply, and the needles are inserted from the two ends to ventilate and sweep air, so that the air between the needles and the inner wall of the tube is difficult to sweep completely, the high temperature of the sample tube filler is directly damaged, the service life is shortened, and the cost is increased. Of course, there is a connection mode in which the two ends of the sample tube are provided with one-way valves, and this mode has the disadvantages of complicated inside of the one-way valve, difficulty in heating, large interference and high residue.

Disclosure of Invention

The utility model aims at providing a thermal desorption binary channels sample cell transfer system with uncap and wear cap function and transfer function.

The purpose of the utility model is realized like this:

a thermal desorption dual-channel sample tube transmission system is characterized in that at least one sample tube output interface 4-1 is arranged on one side of a sample plate 1 and is opposite to a lifting tube seat interface 6-7 coaxial with the sample tube output interface and the lifting tube seat interface, the sample tube output interface and the lifting tube seat interface are connected with an air path of the sample tube output interface, a horizontal in-and-out space of a sample tube heater 5-1 is arranged between the sample tube output interface and the lifting tube seat interface, the sample tube heater 5-1 is horizontally connected with a driver 1 5-2, a manipulator 3 rotation center 9 is arranged on the other side of the sample tube heater 5-1, a tube clamp 3-4 of the manipulator rotates anticlockwise for an angle and is vertically coaxial with a tube cap clamp of a cap removing and wearing frame 2, a tube taking position of the manipulator is set on an intersection point of a connecting line of two points of the manipulator rotation center 9 and a sample plate center 10 and the circumference where a sample tube on the sample plate is located, the manipulator 3 rotates to enable the center of the tube clamp 3-4 installed on the manipulator 3 to rotate to reach the rotation center 9 and the sample plate On a straight line connected with the center 10 of the plate 1, the pipe clamps 3-4 are opened and closed to clamp the sample pipes 1-2 on the sample plate 1, the manipulator 3 rotates anticlockwise to a position between the upper fixing plate 2-2 and the lower fixing plate 2-3 of the uncapping and cap-wearing frame 2, the driving cylinder 2-7 is in transmission connection with the upper fixing plate 2-2 and the lower fixing plate 2-3, the distance between the upper fixing plate and the lower fixing plate is limited by two limiting rings 2-6 on the driving cylinder 2-7, the sample pipes 1-2 with the upper sealing caps 1-1 and the lower sealing caps 1-3 can enter the opened pipe cap clamps 2-8 on the upper fixing plate and the lower fixing plate, the pipe cap clamps 2-8 shrink to clamp the upper pipe caps and the lower pipe caps of the sample pipes 1-2, the upper fixing plate 2-2 and the lower fixing plate 2-3 of the uncapping and cap-wearing frame 2 are in transmission connection with the driving cylinder 2-7, the driving cylinder 2-7 extends vertically upwards and downwards, the upper fixing plate 2-2 and the lower fixing plate 2-3 slide to the upper limit ring 2-10 and the lower limit ring 2-11 along the sliding rod 2-1, the upper tube cap 1-1 and the lower tube cap 1-3 with elastic sealing rings slide along the sample tube 1, the sample tube 1-2 is separated from the sample tube to realize uncapping, the sample tube 1-2 rotates clockwise to the position of a sample tube output interface after uncapping is finished, the 2 nd driver 6-5 of the lifting tube seat interface is fixedly connected with the track 6-4 and is in transmission connection with the lifting tube seat slide block 6-3, the lifting tube seat interface is fixedly connected with the lifting tube seat slide block 6-3, the lifting tube driver 6-1 is in transmission connection with the track 6-4 through the rod 6-2, the lifting tube seat is driven to the middle position in the vertical direction to insert the sample tube into the lifting tube seat interface, the lifting pipe seat interface is internally provided with respective sealing and maintaining O-shaped rings, a pipe clamp 3-4 of the manipulator 3 is opened, the manipulator retracts, a lifting pipe driver 6-1 drives a sliding rod 6-2, a track 6-4 and a lifting pipe seat sliding block 6-3 to drive the lifting pipe seat interface 6-7 to ascend, so that a sample pipe is inserted into the sample pipe output interface 4-1, the sample pipe output interface 4-1 is provided with an elastic sealing ring, the sample pipe is sealed, and therefore desorption pipeline connection including the sample pipe is achieved.

The sliding rod 2-1 is a left sliding rod 2-1-1 and a right sliding rod 2-1-2, the upper fixing plate 2-2 and the lower fixing plate 2-3 are respectively and fixedly connected with a piston rod and a cylinder base of a driving cylinder 2-7, the left and right ends of the upper fixing plate 2-2 and the lower fixing plate 2-3 are respectively and slidably connected with the left sliding rod 2-1-1 and the right sliding rod 2-1-2, when a sample tube with a tube cap enters an upper cap removing tube clamp 2-8-1 and a lower cap removing tube clamp 2-8-2 and 2-8-7 of a cap removing frame, the cap removing tube clamp contracts left and right to clamp the sealing cap 1-1 and 1-3, and then the tube cap clamp 2-8 fixed on the upper fixing plate 2-2 and the lower fixing plate 2-3 respectively moves upwards and downwards under the extending driving of the driving cylinder 2-7 Pulling, wherein the upper fixed plate 2-2 is fixed on a piston rod of a driving cylinder 2-7, the lower fixed plate 2-3 is fixed on a cylinder seat of the cylinder 2-7, the upper fixed plate 2-2 and the lower fixed plate 2-3 are respectively fixed with a 1 st sliding block 2-12-1, a 2 nd sliding block 2-12-2, a 3 rd sliding block 2-12-3 and a 4 th sliding block 2-12-4 which slide along the left sliding rod 2-1-1 and the right sliding rod 2-1-2 of the uncapping stand, because the restraint rings 2-10 and 2-11 fixed on the sliding rod are arranged on the sliding rod, even if the pipe caps are not taken off at the same time due to inconsistent up-down force, the sliding block which reaches the restraint position at the other end stops moving, and the driving cylinder 2-7 is used for continuously extending to take off the other pipe cap. The distance between the two restraint rings 2-10 and 2-11 on the same slide bar is exactly the longest distance that the driving cylinder 2-7 extends out to drive the upper fixing plate 2-2 and the lower fixing plate 2-3 to drive the slide block to reach.

One side of the sample plate 1 is provided with a 1 st sample tube output interface 4-1, a 2 nd sample tube output interface 4-1, a 4-2 st sample tube output interface opposite to a 1 st tube lifting tube base interface 6-7 and a 2 nd tube lifting tube base interface 6-7 which are coaxial below the sample plate 1, the 1 st tube lifting tube base interface 6-6 and the 2 nd tube lifting tube base interface 6-7 are at the lowest positions, the 1 st tube lifting tube base interface, the 2 nd tube lifting tube base interface 6-6 and the 6-7 th tube lifting tube base interface are two loading interfaces which are integrated and are horizontally and axially arranged and are respectively connected with respective gas circuits, a sample tube heater is horizontally arranged between the 1 st sample tube output interface and the 1 st tube lifting tube base interface and the 2 nd tube lifting tube base interface which are coaxial below the sample tube output interface 1 and the 2 nd tube lifting tube base interface, a manipulator 3 rotation center 9 is arranged on a horizontal axis of the sample tube heater, the manipulator rotates 90 degrees anticlockwise, a tube clamp 3-4 of the manipulator is vertically coaxial with a 1 st tube clamp 2-8 th tube cap-8 or a 2 nd tube clamp 2-9, and a manipulator cap-9, and a manipulator taking position is set at a manipulator rotation center 9, On the intersection point of the connecting line of two points of the center 10 of the sample tray and the circumference of the sample tube on the sample tray, 2 sample tubes are loaded continuously from the foremost position set by the thermal desorption method, in the two sample tubes, the 1 st sample tube is firstly placed at the loading position of the extending position of the manipulator, when the command of loading the sample tubes is received, the manipulator 3 rotates to enable the center of a tube clamp 3-4 arranged on the manipulator 3 to rotate to the straight line of the connecting line of the rotating center 9 of the manipulator 3 and the center 10 of the sample tray 1, then the tube clamp 3-4 extends out and opens, the 1 st sample tube 11 clamped on the sample tray 1 is closed, the cylinder 3-1 of the manipulator retracts to the initial position, the manipulator 3 rotates anticlockwise to the connecting line of the rotating center 9 of the manipulator and the sample tube output interface 4, the cylinder 3-1 of the manipulator 3 extends out and continues to rotate to the upper part of the uncapping and capping rack 2, The distance between the upper fixing plate 2-2 and the lower fixing plate 2-3 driven by the driving cylinder 2-7 and the lower fixing plate 2-2 and the lower fixing plate 2-3 is limited by the limiting ring 2-6, the 1 st sample tube with the upper sealing cap 1-1 and the lower sealing cap 1-3 can enter the 1 st tube cap clamp 2-8 opened on the upper fixing plate and the lower fixing plate, the 1 st tube cap clamp 2-8 is positioned at the extending position of the manipulator, the 2 nd tube cap clamp 2-9 is positioned at the contracting position of the manipulator, the 1 st tube cap clamp 2-8 contracts to clamp the upper tube cap 1-1 and the lower tube cap 1-2 of the 1 st sample tube 1-2, the upper fixing plate 2-2 and the lower fixing plate 2-3 of the uncapping cap wearing frame 2 are in transmission connection with the driving cylinder 2-7, the driving cylinder 2-7 vertically extends, the upper fixing plate 2-2 and the lower fixing plate 2-3, 2-3 slides to the upper limit ring 2-10 and the lower limit ring 2-11 along the sliding rod 2-1, the upper and lower pipe caps 1-1, 1-3 with elastic sealing rings slide along the 1 st sample pipe 1-2, leave the 1 st sample pipe 1-2 to realize uncapping, when the 1 st sample pipe 1-2 finishes uncapping, the track rotates clockwise on the circular arc 7 of the extension pipe clamp 3-4 of the manipulator to the position of the sample pipe output interface 4, the 2 nd driver 6-5 of the lifting pipe seat interface pushes the 1 st, 2 lifting pipe seat interfaces 6-6 and 6-7 to move to the center of the 2 nd lifting pipe seat interface 6-7 on the position of the circle 7, namely the position just extending out of the manipulator 3, and then the lifting pipe driver 6-1 drives the 1 st, 2 nd lifting pipe seats 6-7, 6-6 to the middle position in the vertical direction, the sample tube 1-2 is inserted into the 1 st tube lifting seat interface 6-7, each tube lifting seat interface is internally provided with a respective sealing and retaining O-shaped ring, at the moment, the sample tube heater 5 is opened, the expansion and contraction of the mechanical arm 3 are not influenced, then the tube clamp 3-4 of the mechanical arm 3 is opened, the mechanical arm is retracted, the tube lifting seat is vertically driven to return to the initial position to prepare for the loading of the 2 nd sample tube, the 2 nd driver 6-5 of the tube lifting seat interface is retracted to the initial position, the 1 st and 2 nd tube lifting seat interfaces are fixed on the tube lifting seat sliding block 6-3 of the tube lifting seat and can slide along the track 6-4, the mechanical arm 3 continuously rotates clockwise to the tube taking position of the sample plate to wait for the sample plate to rotate the 2 nd sample tube to the tube taking position, the tube clamp 3-4 of the mechanical arm 3 is opened, The manipulator extends out to a tube taking position, then the tube clamps 3-4 are closed to clamp the sample tubes, the manipulator 3 is retracted, the manipulator 3 rotates anticlockwise to a position where the cap is put on and taken off the cap frame, at the moment, the cap is put on and taken off the cap frame and returns to an initial position after the 1 st sample tube is taken off the cap, and the 2 nd tube cap clamp 2-9 with the cap worn and uncapped rack is in an open state, the 2 nd sample tube 1-2 with the sealing caps 1-1 and 1-3 is just positioned at the central position of the 2 nd tube cap clamp 2-9 with the cap worn and uncapped rack, then the 2 nd tube cap clamp 2-9 contracts to clamp the upper and lower sealing caps 1-1 and 1-3 of the 2 nd sample tube, then the cap wearing and uncapping frame slides along the pair of sliding rods 2-1, and the 2 nd tube cap clamp 2-9 of the cap wearing and uncapping frame is driven to vertically enable the upper sealing cap 1-1 and the lower sealing cap 1-3 to leave the 2 nd sample tube 1-2 to realize uncapping. Then the manipulator 3 rotates clockwise, the track 1-1 of the sample tube stops on the track circle 8 of the tube clamp 3-4 at the contraction position of the manipulator, the sample tube stops in the direction of the connecting line of the rotation center of the manipulator 3 and the sample tube output interface 4, then the sample tube 2 extends out, the sample tube 2 is right at the center of the 2 nd tube lifting seat interface 6-7, the tube lifting driver 6-1 drives the slide rod 6-2 to drive the whole tube lifting seat to rise to the middle position, the sample tube 2 1-2 is inserted into the 2 nd tube lifting seat interface 6-7, then the tube clamp 3-4 of the manipulator 3 is opened and retracted to the initial position to wait for taking the tube, the sample tube 1 and the sample tube 2 are inserted into the tube lifting seat interfaces 1, 2, 6-6 and 6-7, at the time, the tube lifting driver 6-1 drives the slide rod 6-2, the track 6-4 and the track 6-4, The lifting pipe seat sliding block 6-3 drives the 1 st and 2 nd lifting pipe seat interfaces 6-6 and 6-7 to ascend, so that two sample pipes are inserted into the 1 st and 2 nd sample pipe output interfaces 4-2 and 4-1, the 1 st and 2 nd sample pipe output interfaces 4-2 and 4-1 are provided with elastic sealing rings to seal the sample pipes, desorption pipeline connection including the sample pipes is achieved, pipe loading during stacking is achieved, the process of putting on the caps of the sample pipes is opposite to the process of putting off the caps, and the sample pipes are put back to the original positions of the sample discs.

The utility model has the advantages as follows:

to ensure the sample tube is in a closed state before analysis, to protect the sample tube packing and to ensure the quality of analysis, the best method is to place the sample tube with a sealing cap on the sample plate of the instrument, when the analysis is needed, the sample tube is automatically sampled by a mechanical arm and sent to a uncapping mechanism to be uncapped, then sent to a loading mechanism to be loaded, and then a series of sample processing processes of analysis are carried out. This has proven to be the best sample tube transfer connection for thermal desorption to date. Is the transfer process of one or two sample tubes.

The sample tube transfer system with uncapping and capping functions can provide quality assurance for subsequent sample processing. A single-channel thermal desorption process one sample at a time, and the whole detection system obtains one detection result. If a double-channel processing mode is adopted, the whole analysis efficiency can be improved by 50 percent, the cost is greatly reduced, and especially the analysis effect of the total volatile organic compounds with long analysis time is larger.

The utility model discloses the realization uses the sample cell transmission system who has the uncapping and put on the cap function of one set of single channel to realize the transmission of two sample cells and load the stack formula tubulation of getting the pipe and putting on the cap, can realize the uncapping of many sample cells according to this method and load and unload and put on the cap.

The utility model discloses a butt joint of removing tube socket and manipulator has reduced the requirement to complicated hardware, provides convenience for realizing automatic intellectuality.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a right side view of fig. 1.

Fig. 4 is a view a-a of fig. 2.

Fig. 5 is a bottom view and a-a view of the cap clip 2-8.

FIG. 6 is a view showing the arrangement of the gas claw.

Fig. 7 is a cross-sectional view of fig. 7 taken along line C-C of fig. 2.

Detailed Description

The sample disc is a disc provided with a plurality of clamps with clamping functions and is driven by a motor and the position of the sample disc is controlled by a controller;

the manipulator is a device which is controlled by a controller to rotate, can stretch and retract, and is provided with a pipe clamp at one end of the manipulator;

the uncapping stand mainly comprises two vertical slide rods, a driver which can lead the uncapping plate which is fixed and uncapped up and down to move up and down, and a limiting stopper

The tube lifting seat can move up and down and stay at an intermediate state, and can also move at the position of a connector of the outlets of the two connecting tubes along the telescopic direction of the mechanical arm;

the structure of the double-sample-tube heater is disclosed in patent No. ZL 201310023569.5, and the structure of the thermal desorption first-stage sample-tube heater.

A thermal desorption double-channel sample tube transfer system is characterized in that a sample tube loading output interface 4 is arranged on one side of a sample plate 1 and is opposite to lifting tube seat interfaces 6-6 and 6-7 below the sample plate, a sample tube heater is arranged between the sample tube loading output interface and the lifting tube seat interfaces, one side of the sample tube heater in the horizontal axial direction is opposite to a manipulator 3 which is not arranged on a horizontal plane, the manipulator is opposite to a cap removing and wearing rack 2 after rotating by an angle of 90 degrees, the tube taking position of the manipulator is set on the straight line of the connecting line of two points of a manipulator rotation center 9 and a sample plate center 10, and after the manipulator extends out, the tube clamp center rotates to the tangent point of the circumference where a sample tube on the sample plate is located around the rotation center of the manipulator,

loading of sample tubes 2 sample tubes were loaded consecutively starting from the foremost position set by the thermal desorption method, of which the first tube was first placed in the loading position of the manipulator's extended position, the corresponding uncapping position being also distal,

FIG. 5 is a bottom view of the tube cap clamp 2-8 and an A-A view of the two tube cap clamps of FIG. 3. the pneumatic gripper cylinder 2-8-3 is a commercial pneumatic gripper cylinder and the two tube cap clamps 2-8-1 and 2-8-2 are attached to the pneumatic grippers 2-8-4 and 2-8-5, respectively, and the pneumatic gripper cylinder 2-8-3 is capable of driving the pneumatic grippers 2-8-4 and 2-8-5 to drive the tube cap clamps 2-8-1 and 2-8-2 to open and close left and right, shown in a contracted closed state. As shown in A-A, the tube cap clamps 2-8-1 and 2-8-2 have two arc surfaces, the diameter of the arc surface on the upper surface is the same as that of the cylindrical surface of the tube cap, the diameter of the arc surface on the lower surface is smaller than that of the cylindrical surface of the tube cap, before a sample tube with the tube cap enters the decapping frame 2, the air claw cylinder 2-8-3 drives the air claws 2-8-4 and 2-8-5 to be opened left and right, and after the sample tube with the tube cap enters the decapping frame 2 (shown in figure 6), the air claw cylinder 2-8-3 drives the air claws 2-8-4 and 2-8-5 to be contracted left and right to drive the tube cap clamps 2-8-1 and 2-8-2 to close and clamp the tube cap.

The sample tube uncapping rack works as follows: FIG. 7 is a cross-sectional view taken along line C-C of FIG. 2

When a sample tube with a tube cap enters an upper uncapping tube clamp 2-8-1 and 2-8-2 and a lower uncapping tube clamp 2-8-6 and 2-8-7 of an uncapping frame, the uncapping tube clamp contracts left and right to clamp the tube cap 1-1 and 1-3, then the uncapping clamp is fixed on an upper uncapping clamp fixing plate 2-2 and an uncapping clamp fixing plate 2-3 and is respectively pulled upwards and downwards under the driving of the extension of a driving cylinder 2-7, the uncapping fixing plate 2-2 is fixed on a piston rod of the driving cylinder 2-7, the lower uncapping clamp fixing plate 2-3 is fixed on a cylinder seat of the cylinder 2-7, and two sliding blocks 2-12-1 and 2-12-2 which slide on an uncapping sliding rod 2-1-1 and 2-1-2 are respectively fixed on the fixing plates 2-2 and 2-3, 2-12-3 and 2-12-4, because the slide bar is provided with the restraint rings 2-10 and 2-11 fixed on the slide bar, even if the pipe caps are not taken off at the same time due to inconsistent up and down force, the slide block which reaches the restraint position at the other end stops moving, and the air cylinder 2-7 which is taken as a fulcrum continues to extend out to take off the other pipe cap. The distance between the two restraint rings 2-10 and 2-11 on the same slide bar is exactly the longest distance that the cylinder 2-7 extends out to drive the uncapping fixed plates 2-2 and 2-3 so as to drive the slide block to reach.

The process of putting on the cap is opposite.

When receiving a tube loading command, the manipulator 3 rotates to enable the center of a tube clamp 3-4 arranged on the manipulator 3 to rotate to a straight line of a connecting line of a rotating center 9 of the tube clamp and a center 10 of a sample plate 1, then the tube clamp 3-4 extends out and is opened, then a sample tube 11 clamped on the sample plate 1 is closed, a cylinder 3-1 of the manipulator retracts to an initial position, the manipulator 3 rotates anticlockwise to a connecting line of the rotating center 9 of the manipulator and a sample tube loading output interface 4, the cylinder 3-1 of the manipulator 3 extends out, then the manipulator continues to rotate to a position between an upper fixing plate 2-2 and a lower fixing plate 2-3 of a cap removing and wearing frame 2, the distance between the upper fixing plate 2-2 and the lower fixing plate 2-3 driven by a driving cylinder 2-7 is limited by a limiting ring 2-6, and the sample tube just provided with sealing caps 1-1 and 1-3 can enter an opened 1 st fixing plate on the upper fixing plate and the lower fixing plate, 2, in the tube cap clamps 2-8 and 2-9, the 1 st tube cap clamp 2-8 is positioned at the extending position of a manipulator, the 2 nd tube cap clamp 2-9 is positioned at the retracting position of the manipulator, then the 1 st tube cap clamp 2-8 is retracted to clamp the tube cap 1-1 of the 1 st sample tube 1-2, at this time, the 1 st sample tube with the sealed tube cap 1-1 is positioned at the far end position where the manipulator extends, the upper and lower driving plates 2-2 and 2-3 of the uncapping and cap wearing frame 2 in the vertical direction are extended by the driving cylinder 2-7 to drive the upper and lower driving plates 2-1 to slide to the upper limit ring 2-10 and the lower limit ring 2-11 along the rod 2-1, and because of the up and down constraint limit, the upper and lower tube caps 1-1 and 1-3 with the elastic sealing rings slide along the 1 st sample tube 1-2 and leave the 1 st sample tube 1-2 to realize uncapping, at the moment, the 1 st sample tube 1-2 is clamped on the mechanical tube clamp 3-4 and is kept immovable in the vertical direction, the 1 st and 2 nd tube lifting seat interfaces 6-6 and 6-7 are positioned at the lowest positions, the 1 st and 2 nd tube lifting seat interfaces 6-6 and 6-7 are two loading interfaces which are integrally and horizontally and axially arranged and are respectively connected with respective gas circuits, when the 1 st sample tube 1-2 finishes uncapping, the sample tube rotates clockwise along the track on an arc 7 of the mechanical arm extending out of the tube clamp 3-4 to a loading position-sample tube output interface 4 position, then a 2 nd driver 6-5 of the tube lifting seat interfaces pushes the 1 st and 2 nd tube lifting seat interfaces 6-6 and 6-7 to move to the position of the 2 nd tube lifting seat interface 6-7 at the center of the circle 7, namely to the position just extending out of the mechanical arm 3, then the tube lifting cylinder 6-1 drives the 1 st and 2 nd tube lifting seats 6-6 and 6-7 to the middle position in the vertical direction to insert the sample tubes 1-2 into the 1 st tube lifting seat interface 6-6, each tube lifting seat interface is internally provided with a respective sealing and maintaining O-shaped ring, the sample tube heater 5 is opened at the moment and does not influence the extension and retraction of the manipulator 3, then the tube clamps 3-4 of the manipulator 3 are opened, the manipulator retracts, the tube lifting seats are vertically driven to the initial position to prepare for the loading of the 2 nd sample tubes, the 2 nd drivers 6-5 of the tube lifting seat interfaces retract to the initial position, the 1 st and 2 nd tube lifting seat interfaces are fixed on the tube lifting seat sliding blocks 6-3 of the tube lifting seats and can slide along the tracks 6-4,

then the manipulator 3 continues to rotate clockwise to the direction of the tube taking position of the sample tray to wait for the sample tray to rotate the 2 nd sample tube to the tube taking position, the tube clamp 3-4 of the manipulator 3 is opened, the manipulator extends to the tube taking position, then the tube clamp 3-4 is closed to clamp the sample tube, the manipulator 3 is retracted, the manipulator 3 rotates anticlockwise to the position of the cap wearing and uncapping rack, at the moment, the cap wearing and uncapping rack returns to the initial position after the 1 st sample tube is uncapped, the 2 nd tube cap clamp 2-9 of the cap wearing and uncapping rack is in an open state, the 2 nd sample tube 1-2 with the sealing caps 1-1 and 1-3 is just at the central position of the 2 nd tube cap clamp 2-9 of the uncapping and wearing and uncapping rack, then the 2 nd tube cap clamp 2-9 contracts to clamp the upper sealing cap 1-1 and the lower sealing cap 1-3 of the 2 nd sample tube, then the cap wearing and uncapping frame slides along the pair of slide bars 2-1, the 2 nd tube cap clamp 2-9 of the cap wearing and uncapping frame is driven to move in the vertical direction, so that the upper sealing cap 1-1 and the lower sealing cap 1-3 are separated from the 2 nd sample tube 1-2, and uncapping is realized. Then the manipulator 3 rotates clockwise, the track of the sample tube 1-1 is stopped on a track circle 8 of a tube clamp 3-4 at the contraction position of the manipulator in the direction of a connecting line of the rotation center of the manipulator 3 and the sample tube output interface 4, then the sample tube 2 is stretched out, the sample tube 2 is right at the center of a tube lifting seat interface 6-7, a tube lifting driver 6-1 drives a sliding rod 6-2 to drive the whole tube lifting seat to ascend to the middle position, the sample tube 2 1-2 is inserted into the tube lifting seat interface 6-7, and then the tube clamp 3-4 of the manipulator 3 is opened and retracted to the initial position to wait for taking the tube.

At present, the 1 st and 2 nd sample tubes are inserted into the 1 st and 2 nd lifting tube seat interfaces 6-6 and 6-7, at the moment, the lifting tube driver 6-1 drives the sliding rod 6-2, the rail 6-4 and the lifting tube seat sliding block 6-3 to drive the 1 st and 2 nd lifting tube seat interfaces 6-6 and 6-7 to ascend, so that the two sample tubes are inserted into the 1 st and 2 nd sample tube output interfaces 4-2 and 4-1, the 1 st and 2 nd sample tube output interfaces 4-2 and 4-1 are provided with elastic sealing rings, the sample tubes are sealed, the desorption pipeline connection including the sample tubes is realized, and the tube loading during stacking is realized.

Also affecting the transfer of sample tubes there are tube heaters, the presence of which does not allow the robot to rotate directly in the horizontal direction when loading or removing sample tubes, so that the tube lifting seats must be movable out of the way.

The process of taking the tube and putting the cap is the reverse process of the tube loading method, and the sample tube is put back to the original position of the sample plate.

Claims (3)

1. The thermal desorption double-channel sample tube transfer system is characterized in that at least one sample tube output interface (4-1) is arranged on one side of a sample plate (1) and is opposite to a lifting tube seat interface (6-7) coaxial below the sample tube output interface, the lifting tube seat interface is connected with an air passage of the sample tube output interface, a horizontal in-and-out space of a sample tube heater (5-1) is arranged between the sample tube output interface and the lifting tube seat interface, the sample tube heater (5-1) is in transmission connection with a driver (5-2) 1, a manipulator (3) rotation center (9) is arranged on one side of the sample tube heater, a manipulator tube taking position is set on an intersection point of a two-point connecting line of the manipulator rotation center (9) and a sample plate center (10) and the circumference where a sample tube on the sample plate is located, a driving cylinder (2-7) and an upper fixing plate (2-2), The lower fixing plate (2-3) is in transmission connection, the upper fixing plate (2-2) and the lower fixing plate (2-3) are in sliding fit with the sliding rod (2-1), the sliding rod (2-1) is provided with an upper restraining ring (2-10) and a lower restraining ring (2-11), the distance between the upper fixing plate and the lower fixing plate is limited by two limiting rings (2-6) on the driving cylinder, the sample tube (1-2) is provided with an upper sealing cap (1-1) and a lower sealing cap (1-3), the upper fixing plate and the lower fixing plate are in transmission connection with the driving cylinder, the driving cylinder is vertically arranged, a 2 nd driver (6-5) of the tube lifting seat interface is fixedly connected with the track (6-4) and the tube lifting seat slider (6-3), the tube lifting seat interface is fixedly connected with the tube lifting seat slider, the tube lifting driver (6-1) is in transmission connection with the track (6-4) through the sliding rod (6-2), the interfaces of the lifting tube seats are respectively provided with a sealing and retaining O-shaped ring, and the output interfaces of the sample tubes are provided with elastic sealing rings.

2. The thermal desorption two-channel sample tube transfer system according to claim 1, wherein the sliding rods (2-1) are a left sliding rod (2-1-1) and a right sliding rod (2-1-2), the upper and lower fixing plates are respectively fixedly connected with the piston rod and the cylinder base of the driving cylinder (2-7), the left and right ends of the upper and lower fixing plates are respectively provided with a sliding block which is respectively connected with the left and right sliding rods, the upper fixing plate (2-2) is fixed on the piston rod of the driving cylinder, the lower fixing plate (2-3) is fixed on the cylinder base of the cylinder, and two sliding blocks (2-12-1, 2-12-2) which slide along the left sliding rod (2-1-1) and the right sliding rod (2-1-2) are respectively fixed at two ends of the upper and lower fixing plates, The distance between the two restraint rings on the same sliding rod is just the longest distance for driving the upper fixing plate and the lower fixing plate after the driving cylinder extends out so as to drive the sliding block to reach the 3 rd sliding block (2-12-3) and the 4 th sliding block (2-12-4).

3. The thermal desorption dual-channel sample tube transfer system according to claim 1 or 2, wherein the 1 st sample tube output interface (4-1) and the 2 nd sample tube output interface (4-2) on one side of the sample tray (1) are opposite to the 1 st lifting tube seat interface (6-7) and the 2 nd lifting tube seat interface (6-6) which are coaxial below the sample tray, the 1 st and 2 nd lifting tube seat interfaces are two integrated loading interfaces which are horizontally and axially arranged and are respectively connected with respective gas circuits, a sample tube heater is horizontally arranged between the 1 st and 2 nd sample tube output interfaces and the 1 st and 2 nd lifting tube seat interfaces which are coaxial below the sample tube output interfaces, a sample tube heater horizontally enters and exits a space, and a manipulator rotation center (9) is arranged in the horizontal direction of the sample tube heater.

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