Automatic feeding and discharging device for headspace sample injector

Abstract

The invention discloses an automatic feeding and discharging device of a headspace sample injector, and belongs to the technical field of sample feeding and discharging of headspace sample injectors. An automatic feeding and discharging device for a headspace sample injector comprises a mounting table and a headspace sample injector body fixedly mounted on the mounting table, and further comprises a storage rack fixedly connected with the mounting table; the first lifting frame and the second lifting frame are arranged on the storage frame in a lifting mode, and when the first lifting frame ascends, the second lifting frame descends; the tray is used for storing a sample container and is placed on the first lifting frame and the second lifting frame; the automatic carrying assembly is arranged on the storage rack and the headspace sample injector body; the automatic clamping jaw is arranged on the automatic carrying assembly and is used for carrying the sample in the tray into the headspace sample injector body; the whole process from automatic carrying, positioning, clamping, detection and final placement of the sample container is automatic, manual operation is greatly reduced, and the working efficiency and accuracy are improved.

Description

Technical Field

[0001] The invention relates to the technical field of sample loading and unloading of a head space sampler, in particular to an automatic loading and unloading device for a head space sampler. Background Art

[0002] The fully automatic headspace injector can realize fully automatic heating, headspace, carrier gas, and delivery into the chromatograph.

[0003] At present, the headspace bottles containing samples need to be placed manually one by one in each hole of the heating turntable, and the residual sample headspace bottles after the headspace need to be taken out manually one by one. Therefore, when the equipment is working, manual work is required to place and take out the headspace bottles at any time, which is inconvenient, especially at night. For example, two batches of headspace bottles need to be replaced in one night shift of multiple fully automatic headspace samplers. If personnel are arranged on duty, it will cause a waste of manpower and increase the test cost; if personnel are not arranged on duty, the headspace sampler cannot work, which will affect the test progress and the utilization rate of the equipment. In view of this, an automatic loading and unloading device for the headspace sampler is proposed. Summary of the invention

[0004] The invention aims to solve the problem that samples need to be manually loaded and unloaded in the prior art, and proposes an automatic loading and unloading device for a head space sampler.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic loading and unloading device for a head space sampler comprises a mounting platform and a head space sampler body, wherein the head space sampler body is fixedly mounted on the mounting platform, and further comprises: a storage rack fixedly connected to the mounting platform; a first lifting rack and a second lifting rack, both of which are lifted and arranged on the storage rack, and when the first lifting rack rises, the second lifting rack descends; a tray for storing sample containers, placed on the first lifting rack and the second lifting rack; an automatic transport component, arranged on the storage rack and the head space sampler body; and an automatic gripper, arranged on the automatic transport component, for transporting samples in the tray into the head space sampler body.

[0007] As a preferred embodiment of the present invention: the first lifting frame includes a first guide rail fixedly mounted on the storage rack, a second guide rail is slidably connected to the first guide rail, the second guide rail is perpendicular to the first guide rail, a first mounting plate is slidably mounted on the second guide rail, the tray with untested samples is placed on the first mounting plate, a first positioning magnet is fixedly mounted on the second guide rail, and the first positioning magnet is attracted to the first mounting plate.

[0008] As a preferred embodiment of the present invention: the second lifting frame includes a third guide rail fixedly mounted on the storage rack, a fourth guide rail is slidably connected to the third guide rail, the fourth guide rail is perpendicular to the third guide rail, a second mounting plate is slidably mounted on the fourth guide rail, the tray with the tested samples is placed on the second mounting plate, a second positioning magnet is fixedly mounted on the fourth guide rail, and the second positioning magnet is attracted to the second mounting plate.

[0009] As a preferred embodiment of the present invention: a mounting seat is fixedly installed at the rear end of the storage rack, a first motor is fixedly installed on the mounting seat, a second connecting plate and a first connecting plate are fixedly installed on the upper and lower ends of the first guide rail and the third guide rail respectively, a first pulley is rotatably installed on the first connecting plate and the second connecting plate, a first belt is coupled to the two groups of the first pulleys, and the left and right sides of the first belt are fixedly connected to the second guide rail and the fourth guide rail respectively.

[0010] As a preferred embodiment of the present invention: an alignment plate is rotatably mounted on both the first mounting plate and the second mounting plate, an alignment column is fixedly mounted on the alignment plate, wherein the alignment column arranged on the first mounting plate is an electric heating column.

[0011] As a preferred embodiment of the present invention: a bottle groove for placing sample bottles is opened on the tray, a socket is set on the tray, the alignment column is inserted into the socket, and a positioning column is fixedly installed on the socket. When multiple groups of trays are stacked together, the positioning column on the lower tray is inserted into the socket of the upper tray, the positioning column is a heat-conducting metal rod, and a heat-conducting plate is fixedly installed in the tray, and the heat-conducting plate is fixedly connected to the positioning column.

[0012] As a preferred embodiment of the present invention: the automatic handling assembly includes a fifth guide rail fixedly installed on the top of the storage rack and the head space sampler body, a transport plate is slidably installed on the bottom of the fifth guide rail, a second motor is fixedly installed on the top of the side wall of the storage rack, a second pulley is fixedly installed on the output shaft of the second motor, a third pulley is rotatably installed on the top of the head space sampler body, a second belt is coupled to the second pulley and the third pulley, the second belt is fixedly connected to the transport plate, a laser receiver is fixedly installed on the transport plate, a laser transmitter is fixedly installed on the storage rack, and the laser receiver is used to receive the ranging laser emitted by the laser transmitter.

[0013] As a preferred embodiment of the present invention: a spline sleeve is rotatably installed on the transport plate, a spline shaft is slidably installed on the spline sleeve, the automatic clamp is fixedly installed on the bottom of the spline shaft, a third mounting plate is fixedly installed on the transport plate, a third motor is fixedly installed on the third mounting plate, the output shaft of the third motor rotates synchronously with the spline sleeve through a gear set, a first electric telescopic rod is fixedly installed on the transport plate, a transmission plate is fixedly installed on the output end of the first electric telescopic rod, and the transmission plate is rotatably connected to the spline shaft.

[0014] As a preferred embodiment of the present invention: the automatic clamp includes: a first connecting plate fixedly installed at the bottom of the spline shaft; a second connecting plate, fixed to the first connecting plate by bolts, a fixed plate clamped and fixed between the first connecting plate and the second connecting plate, a shrinkage hole is provided on the fixed plate, and the sample bottle is fixed in the shrinkage hole; a second electric telescopic rod, fixedly installed on the transport plate, a first electromagnet is fixedly installed on the output end of the second electric telescopic rod; a second electromagnet is fixedly installed on the side wall of the second connecting plate.

[0015] As a preferred embodiment of the present invention: the head space sampler body is provided with N placement holes, and the shrinkage holes are provided with N+1.

[0016] Compared with the prior art, the present invention provides an automatic loading and unloading device for a head space sampler, which has the following beneficial effects:

[0017] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The present invention realizes fast and accurate sample handling and material replacement through stacking multiple groups of trays, multi-point clamping of automatic grippers, and the coordinated work of the transport plate and the automatic grippers, thereby significantly improving the sample processing speed; position monitoring is performed by a combination of a laser transmitter and a laser receiver, and the precise adsorption of the first positioning magnet and the second positioning magnet ensures high-precision positioning of the tray and the sample container during the transportation process, avoiding operational errors caused by position deviation; by adjusting the number of sample slots on the tray, the number and layout of shrinkage holes, and the number of placement holes on the head space sampler body, the device can flexibly adapt to different numbers and types of sample processing requirements and has good scalability; the electric heating column and the heat conduction system are integrated into the tray design, which can preheat the sample before sample detection, shorten the detection time, and improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an automatic loading and unloading device for a head space sampler proposed by the present invention Figure 1 ;

[0019] Figure 2A schematic diagram of the three-dimensional structure of an automatic loading and unloading device for a head space sampler proposed by the present invention Figure 2 ;

[0020] Figure 3 A schematic diagram of the structure of an automatic clamping jaw of an automatic loading and unloading device for a head space sampler proposed by the present invention Figure 1 ;

[0021] Figure 4 This is a structural schematic diagram of a first lifting frame and a second lifting frame of an automatic loading and unloading device for a head space sampler proposed by the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the fifth guide rail of the automatic loading and unloading device for a head space sampler proposed by the present invention;

[0023] Figure 6 A schematic diagram of the structure of an automatic clamping jaw of an automatic loading and unloading device for a head space sampler proposed by the present invention Figure 2 ;

[0024] Figure 7 This is a structural schematic diagram of an alignment plate of an automatic loading and unloading device for a head space sampler proposed by the present invention;

[0025] Figure 8 The present invention provides a schematic structural diagram of a tray for an automatic loading and unloading device for a head space sampler.

[0026] In the figure: 1, storage rack; 2, mounting table; 3, head space sampler body; 4, placement hole; 5, first guide rail; 6, second guide rail; 7, first mounting plate; 8, first positioning magnet; 9, third guide rail; 10, fourth guide rail; 11, second positioning magnet; 12, second mounting plate; 13, alignment plate; 14, alignment column; 15, tray; 16, jack; 17, positioning column; 18, bottle slot; 19, mounting seat; 20, first motor; 21, first connecting plate; 22, second connecting plate; 23, first pulley; 24, first belt; 25 , the fifth guide rail; 26, the transport plate; 27, the second motor; 28, the second pulley; 29, the third pulley; 30, the second belt; 31, the laser transmitter; 32, the laser receiver; 33, the spline sleeve; 34, the spline shaft; 35, the third mounting plate; 36, the third motor; 37, the gear set; 38, the transmission plate; 39, the first electric telescopic rod; 40, the second electric telescopic rod; 41, the first electromagnet; 42, the first connecting disk; 43, the fixed disk; 44, the second connecting disk; 45, the second electromagnet; 46, the heat conducting plate; 47, the shrinkage hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Example: Refer to Figure 1-Figure 8 , an automatic loading and unloading device for a head space sampler, comprising a mounting platform 2 and a head space sampler body 3, the head space sampler body 3 is fixedly mounted on the mounting platform 2, and also comprising: a storage rack 1, fixedly connected to the mounting platform 2; a first lifting rack and a second lifting rack, both of which are lifted and arranged on the storage rack 1, when the first lifting rack rises, the second lifting rack descends; a tray 15, used for storing sample containers, placed on the first lifting rack and the second lifting rack; an automatic transport component, arranged on the storage rack 1 and the head space sampler body 3; an automatic gripper, arranged on the automatic transport component, used to transport the sample in the tray 15 to the head space sampler body 3.

[0030] When in use, a plurality of trays 15 containing samples are stacked together and then placed on the first lifting frame. The samples in the uppermost tray 15 are transported to the top of the head space sampler body 3 through the cooperation of the automatic transport component and the automatic gripper, and then the samples are placed in the head space sampler body 3 to realize automatic loading. After loading, the automatic transport component cooperates with the automatic gripper to move the empty tray 15 from the first lifting frame to the second lifting frame, and then the first lifting frame drives the stacked trays 15 to rise. Then, when the head space sampler body 3 is about to complete the detection of the samples inside it, the automatic transport component cooperates with the automatic gripper to grab the samples in the tray 15, and then move the samples to the top of the head space sampler body 3, replace the untested samples with the tested samples, and then send the tested samples to the top of the empty tray 15, and discharge the tested samples into the empty tray 15, so as to realize automatic loading and unloading. For this reason, when a large number of samples are detected by the head space sampler body 3 at night, there is no need for staff to load and unload the samples.

[0031] Reference Figure 2 , Figure 4 and Figure 7The first lifting frame includes a first guide rail 5 fixedly mounted on the storage rack 1, a second guide rail 6 is slidably connected to the first guide rail 5, the second guide rail 6 is perpendicular to the first guide rail 5, a first mounting plate 7 is slidably mounted on the second guide rail 6, a tray 15 with untested samples is placed on the first mounting plate 7, a first positioning magnet 8 is fixedly mounted on the second guide rail 6, the first positioning magnet 8 is attracted to the first mounting plate 7, the second lifting frame includes a third guide rail 9 fixedly mounted on the storage rack 1, a fourth guide rail 10 is slidably connected to the third guide rail 9, the fourth guide rail 10 is perpendicular to the third guide rail 9, a second mounting plate 12 is slidably mounted on the fourth guide rail 10, a tray 15 with tested samples is placed on the second mounting plate 12, a second positioning magnet 8 is fixedly mounted on the fourth guide rail 10 The positioning magnet 11, the second positioning magnet 11 and the second mounting plate 12 are attracted to each other, the rear end of the storage rack 1 is fixedly installed with a mounting seat 19, and the first motor 20 is fixedly installed on the mounting seat 19. The upper end and the lower end of the first guide rail 5 and the third guide rail 9 are respectively fixedly installed with the second connecting plate 22 and the first connecting plate 21, and the first connecting plate 21 and the second connecting plate 22 are both rotatably installed with the first pulley 23, and the two groups of first pulleys 23 are coupled with the first belt 24, and the left and right sides of the first belt 24 are respectively fixedly connected to the second guide rail 6 and the fourth guide rail 10, and the first mounting plate 7 and the second mounting plate 12 are both rotatably installed with an alignment plate 13, and the alignment column 14 is fixedly installed on the alignment plate 13, wherein the alignment column 14 arranged on the first mounting plate 7 is an electric heating column.

[0032] In order to facilitate driving the alignment plate 13 to rotate, a driving motor is fixedly installed at the bottom of the first mounting plate 7 and the second mounting plate 12 , and the rotor of the driving motor is fixedly connected to the alignment plate 13 .

[0033] In this embodiment, the first motor 20 is started, the first motor 20 drives the first pulley 23 to rotate, and the first pulley 23 drives the first belt 24 to rotate. By controlling the rotation direction of the rotor of the first motor 20, the lifting and lowering of the second guide rail 6 and the fourth guide rail 10 are controlled, wherein when the second guide rail 6 rises, the fourth guide rail 10 descends, and each time the first motor 20 is driven once, the second guide rail 6 rises to the height of a tray 15.

[0034] When placing the pallet 15, the first mounting plate 7 can be pulled out from the second guide rail 6, and then the pallet 15 can be placed on the first mounting plate 7 by aligning the alignment column 14 and the alignment plate 13, and then the first mounting plate 7 can be pushed into the inner side of the first storage rack 1 so that the first mounting plate 7 and the first positioning magnet 8 are attracted to each other to achieve accurate loading and positioning.

[0035] When the tested sample needs to be taken out, the second mounting plate 12 is dragged to move the second mounting plate 12 out of the storage rack 1, so that it is convenient for the staff to take out the tray 15. In addition, when the second mounting plate 12 is reset, the second mounting plate 12 and the second positioning magnet 11 are attracted to each other, thereby realizing the precise reset of the second mounting plate 12.

[0036] Reference Figure 2 , Figure 4 , Figure 7 and Figure 8 The tray 15 is provided with a bottle groove 18 for placing sample bottles, and a socket 16 is provided on the tray 15. The alignment column 14 is inserted into the socket 16, and a positioning column 17 is fixedly installed on the socket 16. When multiple groups of trays 15 are stacked together, the positioning column 17 on the lower tray 15 is inserted into the socket 16 of the upper tray 15. The positioning column 17 is a heat-conducting metal rod, and a heat-conducting sheet 46 is fixedly installed in the tray 15, and the heat-conducting sheet 46 is fixedly connected to the positioning column 17.

[0037] When the tray 15 is stored on the first mounting plate 7, the electric heating column is energized to generate heat, and then the heat is conducted to the bottom of the sample container through the heat-conducting metal rod and the heat-conducting sheet 46, so as to preheat the sample inside the sample container, thereby shortening the time for the head space sampler body 3 to detect the sample and improving the detection efficiency of the head space sampler body 3.

[0038] Reference Figure 1-Figure 3 , Figure 5 and Figure 7 The automatic handling component includes a fifth guide rail 25 fixedly installed on the top of the storage rack 1 and the head space sampler body 3, a transport plate 26 is slidably installed at the bottom of the fifth guide rail 25, a second motor 27 is fixedly installed on the top of the side wall of the storage rack 1, a second pulley 28 is fixedly installed on the output shaft of the second motor 27, a third pulley 29 is rotatably installed on the top of the head space sampler body 3, a second belt 30 is coupled to the second pulley 28 and the third pulley 29, the second belt 30 is fixedly connected to the transport plate 26, a laser receiver 32 is fixedly installed on the transport plate 26, a laser transmitter 31 is fixedly installed on the storage rack 1, and the laser receiver 32 is used to receive the ranging laser emitted by the laser transmitter 31.

[0039] In this embodiment, the second motor 27 is started, the second motor 27 drives the second pulley 28 to rotate, the second pulley 28 drives the second belt 30 to rotate, and the second belt 30 drives the transport plate 26 to move along the fifth guide rail 25. During this process, the laser emitter 31 emits a laser which is received by the laser receiver 32. By measuring the reflection time and angle of the laser, the position of the transport plate 26 can be monitored in real time to ensure the movement accuracy of the transport plate 26 and improve the accuracy of moving samples, changing samples, and changing the position of the tray 15.

[0040] Reference Figure 1-Figure 3 and Figure 6 A spline sleeve 33 is rotatably mounted on the transport plate 26, a spline shaft 34 is slidably mounted on the spline sleeve 33, the automatic clamp is fixedly mounted on the bottom of the spline shaft 34, a third mounting plate 35 is fixedly mounted on the transport plate 26, a third motor 36 is fixedly mounted on the third mounting plate 35, the output shaft of the third motor 36 rotates synchronously with the spline sleeve 33 through a gear set 37, a first electric telescopic rod 39 is fixedly mounted on the transport plate 26, a transmission plate 38 is fixedly mounted on the output end of the first electric telescopic rod 39, the transmission plate 38 is rotatably connected to the spline shaft 34, and the automatic clamp includes: a spline shaft fixedly mounted on the spline shaft A first connecting plate 42 at the bottom of 34; a second connecting plate 44 is fixed to the first connecting plate 42 by bolts, a fixing plate 43 is clamped and fixed between the first connecting plate 42 and the second connecting plate 44, a shrinkage hole 47 is provided on the fixing plate 43, and the sample bottle is fixed in the shrinkage hole 47; a second electric telescopic rod 40 is fixedly installed on the transport plate 26, and a first electromagnet 41 is fixedly installed on the output end of the second electric telescopic rod 40; a second electromagnet 45 is fixedly installed on the side wall of the second connecting plate 44, N placement holes 4 are provided on the head space sampler body 3, and N+1 shrinkage holes 47 are provided.

[0041] In this embodiment, the number of sample slots on the tray 15 is the same as the number of placement holes 4 on the head space sampler body 3, but the angle between the two sample slots is the same as the angle between the two contraction holes 47, and the distance from the sample slot to the center of the tray 15 is the same as the distance from the contraction hole 47 to the center of the fixed plate 43.

[0042] When loading, the transport plate 26 carries the automatic gripper and moves to the top of the first lifting frame, so that the fixed plate 43 is coaxial with the tray 15, and then the second electric telescopic rod 40 drives the first electromagnet 41 to descend and contact the sample container, absorbs the sample container by magnetic force, and then rises to drag the sample container into the shrinkage hole 47, wherein the fixed plate 43 is made of a material selected from rubber, silicone, and sponge, which can be expanded and then contracted and has a large friction force, and can fix the sample container entering the shrinkage hole 47. After the sample container enters the shrinkage hole 47 and is fixed, the first electromagnet 41 detaches from the sample container and moves to the top of the first connecting plate 42, and then the driving motor drives the alignment plate 13 to rotate. At the same time, the third motor 36 starts to drive the spline sleeve 33 to rotate, the spline sleeve 33 drives the spline shaft 34 to rotate, and the spline shaft 34 drives the automatic gripper to rotate, and the shrinkage hole 47 is replaced. Then the first electromagnet 41 descends again to absorb the sample container and drags the sample container into the shrinkage hole 47, thereby realizing the grabbing of multiple groups of sample containers.

[0043] Then the transport plate 26 drives the automatic clamp to move, so that the first electromagnet 41 is coaxial with one of the placement holes 4, when changing materials:

[0044] Step 1: Align the empty shrink hole 47 of the hole with the placement hole 4, and the first electromagnet 41 descends to grab the sample in the placement hole 4;

[0045] Step 2: Drag the tested sample into the shrink hole 47 and fix it, then the automatic clamp rotates to move the untested sample container to the top of the empty placement hole 4;

[0046] Step 3: The first electromagnet 41 descends to absorb the undetected sample container, and puts the sample container into the placement hole 4 of the hole;

[0047] Step 4: Replace the placement hole 4 of the head space sampler body 3 with the first electromagnet 41;

[0048] Step 5. Repeat steps 2, 3 and 4 to quickly complete the sample replacement.

[0049] After the sample replacement is completed, the sample container after the test is moved to above the tray 15 of the hole, and the sample container after the test is placed in the tray 15 of the hole through the first electromagnet 41 .

[0050] Among them, the second electromagnet 45 is aligned with the positioning column 17, and then the first electric telescopic rod 39 drives the spline shaft 34 to descend, and the spline shaft 34 drives the automatic clamp to descend, so that the positioning column 17 is inserted into the second electromagnet 45, and then the second electromagnet 45 is energized to adsorb the positioning column 17, and then the automatic clamp rises, and then the automatic clamp is carried by the transport plate 26 to move to the top of the second lifting frame, and then the automatic clamp descends, and then the empty pallet 15 is placed on the alignment plate 13 of the second lifting frame.

[0051] In summary, the device realizes the full automation from automatic handling, positioning, clamping, detection to final placement of sample containers, greatly reducing manual operations and improving work efficiency and accuracy.

[0052] By stacking multiple groups of trays 15, multi-point clamping of the automatic gripper, and the coordinated work of the transport plate 26 and the automatic gripper, fast and accurate sample handling and material replacement are achieved, which significantly improves the sample processing speed.

[0053] Position monitoring using a combination of the laser transmitter 31 and the laser receiver 32 and precise adsorption of the first positioning magnet 8 and the second positioning magnet 11 ensures high-precision positioning of the tray 15 and the sample container during transportation, thereby avoiding operational errors caused by position deviation.

[0054] By adjusting the number of sample slots on the tray 15, the number and layout of the shrinkage holes 47, and the number of placement holes 4 on the head space sampler body 3, the device can flexibly adapt to different numbers and types of sample processing requirements and has good scalability.

[0055] The tray design incorporates electric heating columns and a heat conduction system, which can preheat samples before testing, shortening testing time and improving testing efficiency.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic loading and unloading device for a head space sampler, comprising a mounting platform (2) and a head space sampler body (3), wherein the head space sampler body (3) is fixedly mounted on the mounting platform (2), characterized in that: Also includes: A storage rack (1) fixedly connected to the mounting platform (2); A first lifting frame and a second lifting frame are both arranged on the storage rack (1) for lifting, and when the first lifting frame rises, the second lifting frame falls; A tray (15), used for storing sample containers, placed on the first lifting frame and the second lifting frame; An automatic transport component is arranged on the storage rack (1) and the head space sampler body (3); An automatic gripper is arranged on the automatic transport component and is used to transport the sample in the tray (15) into the head space sampler body (3).

2. The automatic loading and unloading device for head space sampler according to claim 1, characterized in that: The first lifting frame comprises a first guide rail (5) fixedly mounted on the storage rack (1); a second guide rail (6) is slidably connected to the first guide rail (5); the second guide rail (6) is perpendicular to the first guide rail (5); a first mounting plate (7) is slidably mounted on the second guide rail (6); the tray (15) containing untested samples is placed on the first mounting plate (7); a first positioning magnet (8) is fixedly mounted on the second guide rail (6); the first positioning magnet (8) is attracted to the first mounting plate (7).

3. The automatic loading and unloading device for head space sampler according to claim 2, characterized in that: The second lifting frame comprises a third guide rail (9) fixedly mounted on the storage rack (1), a fourth guide rail (10) being slidably connected to the third guide rail (9), the fourth guide rail (10) being perpendicular to the third guide rail (9), a second mounting plate (12) being slidably mounted on the fourth guide rail (10), the tray (15) carrying the tested samples being placed on the second mounting plate (12), a second positioning magnet (11) being fixedly mounted on the fourth guide rail (10), and the second positioning magnet (11) being attracted to the second mounting plate (12).

4. The automatic loading and unloading device for head space sampler according to claim 3, characterized in that: A mounting seat (19) is fixedly mounted at the rear end of the storage rack (1), a first motor (20) is fixedly mounted on the mounting seat (19), a second connecting plate (22) and a first connecting plate (21) are fixedly mounted on the upper end and the lower end of the first guide rail (5) and the third guide rail (9), respectively, a first pulley (23) is rotatably mounted on the first connecting plate (21) and the second connecting plate (22), two groups of the first pulleys (23) are coupled with a first belt (24), and the left and right sides of the first belt (24) are fixedly connected to the second guide rail (6) and the fourth guide rail (10), respectively.

5. The automatic loading and unloading device for head space sampler according to claim 3, characterized in that: An alignment plate (13) is rotatably mounted on both the first mounting plate (7) and the second mounting plate (12), and an alignment column (14) is fixedly mounted on the alignment plate (13), wherein the alignment column (14) arranged on the first mounting plate (7) is an electric heating column.

6. The automatic loading and unloading device for head space sampler according to claim 5, characterized in that: The tray (15) is provided with a bottle groove (18) for placing a sample bottle, and the tray (15) is provided with a socket (16). The alignment column (14) is inserted into the socket (16), and a positioning column (17) is fixedly installed on the socket (16). When multiple groups of trays (15) are stacked together, the positioning column (17) on the lower tray (15) is inserted into the socket (16) of the upper tray (15), and the positioning column (17) is a heat-conducting metal rod, and a heat-conducting sheet (46) is fixedly installed in the tray (15), and the heat-conducting sheet (46) is fixedly connected to the positioning column (17).

7. The automatic loading and unloading device for head space sampler according to claim 1, characterized in that: The automatic transport assembly comprises a fifth guide rail (25) fixedly mounted on the top of the storage rack (1) and the head space sampler body (3); a transport plate (26) is slidably mounted on the bottom of the fifth guide rail (25); a second motor (27) is fixedly mounted on the top of the side wall of the storage rack (1); a second pulley (28) is fixedly mounted on the output shaft of the second motor (27); a third pulley (29) is rotatably mounted on the top of the head space sampler body (3); a second belt (30) is coupled to the second pulley (28) and the third pulley (29); the second belt (30) is fixedly connected to the transport plate (26); a laser receiver (32) is fixedly mounted on the transport plate (26); a laser transmitter (31) is fixedly mounted on the storage rack (1); and the laser receiver (32) is used to receive a distance measuring laser emitted by the laser transmitter (31).

8. The automatic loading and unloading device for head space sampler according to claim 7, characterized in that: A spline sleeve (33) is rotatably mounted on the transport plate (26), a spline shaft (34) is slidably mounted on the spline sleeve (33), the automatic clamp is fixedly mounted on the bottom of the spline shaft (34), a third mounting plate (35) is fixedly mounted on the transport plate (26), a third motor (36) is fixedly mounted on the third mounting plate (35), an output shaft of the third motor (36) rotates synchronously with the spline sleeve (33) via a gear set (37), a first electric telescopic rod (39) is fixedly mounted on the transport plate (26), a transmission plate (38) is fixedly mounted on the output end of the first electric telescopic rod (39), and the transmission plate (38) is rotatably connected to the spline shaft (34).

9. The automatic loading and unloading device for head space sampler according to claim 8, characterized in that: The automatic gripper comprises: A first connecting plate (42) is fixedly mounted on the bottom of the spline shaft (34); a second connecting plate (44) is fixed to the first connecting plate (42) by bolts, a fixing plate (43) is clamped and fixed between the first connecting plate (42) and the second connecting plate (44), a shrinkage hole (47) is provided on the fixing plate (43), and a sample bottle is fixed in the shrinkage hole (47); a second electric telescopic rod (40) is fixedly mounted on the transport plate (26), a first electromagnet (41) is fixedly mounted on the output end of the second electric telescopic rod (40); a second electromagnet (45) is fixedly mounted on the side wall of the second connecting plate (44).

10. The automatic loading and unloading device for head space sampler according to claim 9, characterized in that: The head space sampler body (3) is provided with N placement holes (4), and the contraction holes (47) are provided with N+1.

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