A fully automatic thermal desorption sealed sampling device

Abstract

The invention relates to the technical field of thermal desorption sealing devices, and discloses a full-automatic thermal desorption sealing sampling device. A decapping device is provided to position a sample tube at a preset position in a sample stacking plate, so that the sample tube is located in a middle position, and then the caps at both ends of the positioned sample tube are removed; a transfer device is provided to take the positioned sample tube out of the sample stacking plate and place it at a decapping position preset by a decapping unit under the control of a program, and the decapped sample tube is transferred to a capping position preset by a sealing device, so that the capping unit installs sample tube joints at both ends of the sample tube to complete the sealing of an air path, and the process is all carried out by sliding a slide rail, and a driving device is intelligently controlled by a control device according to a preset program, which not only achieves precise control, but also avoids the use of a needle and a sealing pad, and completely solves the problems of large transmission error, easy damage to sealing, and high use cost.

Description

Technical Field

[0001] The invention relates to the technical field of thermal desorption equipment, and in particular to a full-automatic thermal desorption sealed sampling device. Background Art

[0002] Adsorption thermal desorption is a pretreatment technology for enriching volatile and semi-volatile components in analytical samples. This method does not require the use of any organic solvents, is easy to operate, has high sensitivity, and a detection limit of 10-9. Currently, this method has been applied to environmental samples, food and beverages, drugs, plants, mineral analysis and other fields. However, the thermal desorption sampling device of the current fully automatic thermal desorption device uses a push rod motor drive, which has a large transmission error. The transmission process will cause the needle to shake, thereby causing the needle to tilt or bend, which not only results in poor sealing, but also frequent replacement of needles and sealing pads, resulting in waste and high cost of use. Therefore, there is an urgent need for a sample tube sealing device with a small transmission error, which can effectively avoid needle shaking or even bending, has a good sealing effect and low cost of use.

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a fully automatic thermal desorption sealed sampling device. By providing a capping device, the sample tube at a preset position in the sample stacking plate is positioned so that the sample tube is located in the middle position, and then the caps at both ends of the positioned sample tube are removed; by providing a transfer device, the positioned sample tube is taken out from the sample stacking plate and placed in the capping position preset by the capping unit under the control of the program, and the sample tube after the capping is transferred to the capping position preset by the sealing device, so that the capping unit installs sample tube joints on both ends of the sample tube to complete the sealing of the gas path, and the process is carried out by sliding the slide rail, and the driving device is intelligently controlled by the provided control device according to the preset program, so that the process of capping, sample tube displacement and sample tube joint installation is not only accurately controlled, but also avoids the use of needles and sealing pads, and completely solves the problems of large transmission error, easy damage to sealing and high use cost.

[0004] The specific technical solutions provided by the present invention are as follows:

[0005] A fully automatic thermal desorption sealed sampling device, comprising:

[0006] A capping device, used for positioning the sample tubes in the sample stacking tray and removing the caps of the positioned sample tubes, comprises a capping unit;

[0007] A sealing device, used for capping the sample tube after the cap is removed to complete the gas path sealing, including a capping unit;

[0008] A transfer device, used to transfer the sample tube from the sample stacking plate to a preset position of the capping unit, and to transfer the sample tube after the cap is removed to a preset position of the capping unit, including a gripping unit;

[0009] A driving device, used to drive the capping device, the sealing device, and the transfer device to execute instructions respectively, including a driving unit;

[0010] Control device: intelligently controls the driving device through a program.

[0011] Preferably, the cap-removing device further comprises a cap-removing slide rail, and the cap-removing unit slides back and forth along the cap-removing slide rail under the drive of the cap-removing motor.

[0012] Furthermore, the capping unit is provided with a pair, which is symmetrically arranged at both ends of the capping slide rail. Under the drive of the capping motor, the capping units move towards each other to clamp the necks of both ends of the sample tube, and move in opposite directions to remove the caps from both ends of the sample tube.

[0013] Furthermore, the capping unit comprises a capping clamping portion and a positioning plate for positioning the sample tube before capping, which are fixed together, and the positioning plate is located outside the capping clamping portion.

[0014] Furthermore, the cap-removing and clamping part comprises a cap-removing horizontal plate, one end of which is provided with a neck clamp which can be clamped on the neck of the sample tube, and a clamping card for clamping the cap is fixedly installed between the neck clamp and the positioning plate.

[0015] Furthermore, a pair of capping units are installed at the other end of the capping horizontal plate and are symmetrically arranged at the two ends of the capping slide rail. Driven by the capping motor, the capping units move towards each other to cap the two ends of the sample tube to complete the air path sealing.

[0016] Furthermore, the capping unit comprises a sample tube joint for sealing the mouth of the sample tube, and the sample tube joint is connected to the detection device through an air path.

[0017] Furthermore, the transfer device also includes a transfer slide rail vertically arranged with respect to the cap removal slide rail, and under the control of the tube clamp arm slide module, the grabbing unit slides back and forth along the transfer slide rail to complete the grabbing and displacement of the sample tube.

[0018] Furthermore, the driving unit includes a motor, which also includes a grabbing motor for controlling the opening and closing of the grabbing unit, a turntable motor for controlling the rotation of the sample stacking plate, and a desorption furnace module for controlling the desorption furnace to move to the capping position for heating. The grabbing motor is connected to the tube clamp arm slide module.

[0019] Furthermore, the control device includes a touch screen, and the driving device is intelligently controlled by the touch screen.

[0020] The beneficial effects are:

[0021] The invention provides a full-automatic thermal desorption sealed sampling device. The device is provided with a capping device to position a sample tube at a preset position in a sample stacking plate so that the sample tube is located in the middle position, and then the caps at both ends of the positioned sample tube are removed. The transfer device is provided to take the positioned sample tube out of the sample stacking plate and place it at a capping position preset by a capping unit under the control of a program, and the sample tube after the capping is transferred to a capping position preset by a sealing device, so that the capping unit installs sample tube joints at both ends of the sample tube to complete the sealing of the gas path. The process is all carried out by sliding a slide rail, and the driving device is intelligently controlled by the provided control device according to a preset program, so that the capping process of capping, sample tube displacement and sample tube joint installation is not only accurately controlled, but also avoids the use of needles and sealing pads, and completely solves the problems of large transmission error, easy damage to sealing performance and high use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0023] In the attached picture:

[0024] Figure 1 It is a schematic diagram of the structure of the technical solution of the present invention;

[0025] Figure 2 is a schematic diagram of the structure in which the gripping jaws deliver the sample tube to the cap removal position;

[0026] Figure 3 It is a schematic diagram of the structure in which the gripping jaws deliver the sample tube to the capping position;

[0027] Figure 4 It is a stereogram of the cap removal unit;

[0028] Figure 5 It is a stereoscopic view of the gripping jaw on one side;

[0029] Figure 6 It is a stereogram of the cap unit.

[0030] in:

[0031] Module 1; front photoelectric switch 2; module slider 3; module slide rail 4; support seat 5; rear photoelectric switch 6; grab motor 7; fixing plate 8; grab jaw 9; extension end 91; cap removal fixing frame 10; capping unit 11; sample tube connector 113; sealing ring 111; sealing nut 112; cap removal limiter 12; cap removal motor 13; cap removal sensor sheet 14; cap removal horizontal plate 15; cap removal unit 16; positioning plate 161; neck clamp 162; clamping clamp 163; sample tube cap 17; sample tube 18; sample stacking tray 19; positioning mark 20; sample tray motor 21; six-way valve 22; capture trap 23; desorption furnace 24; desorption furnace module 25; touch screen 26; cap removal slide rail 27. DETAILED DESCRIPTION

[0032] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned throughout the specification and claims, "including" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of implementing the present application, but the description is for the purpose of illustrating the general principles of the present application, and is not used to limit the scope of the present application. The scope of protection of the present application shall be determined by the definition of the attached claims.

[0033] The preferred embodiment of the present invention refers to Figure 1-Figure 6 :

[0034] A fully automatic thermal desorption sealed sampling device comprises a capping device, a sealing device, a transfer device, a driving device and a control device.

[0035] The transfer device includes a module slide rail 4 and a module 1 installed horizontally on a support seat 5, a module slider 3 installed on the module slide rail 4, the module slider 3 is fixedly installed at the lower end of a fixed plate 8, a grab motor 7 and a grab clamp 9 are respectively fixedly installed at both ends of the fixed plate 8, and the grab clamp 9 is symmetrically provided with two pieces, which can perform opening and closing actions under the control of the grab motor 7. When closed, a cylindrical cavity is formed in the middle to match the outer diameter of the sample tube 18. The extended end 91 of the grab clamp 9 makes the cylindrical cavity wrap around the center of the sample tube 18, and can firmly clamp the sample tube 18 for movement. The module 1 controls the module slider 3 to move and controls the grab motor 7 to execute commands.

[0036] The side of the support seat 5 is also equipped with a front photoelectric switch 2 and a rear photoelectric switch 6, which sense the sensor on the module slider 3 to determine the stop position of the module slider 3, thereby determining the working or stop position of the grabbing claw 9.

[0037] The cap removing device comprises a cap removing unit 16 and a cap removing slide rail 27 , and the cap removing slide rail 27 is vertically arranged with respect to the module slide rail 4 . The positioning plate 161 is fixed to the cap-removing horizontal plate 15 by bolts, the cap-removing horizontal plate 15 is fixed to the cap-removing fixing frame 10 by bolts, the cap-removing fixing frame 10 is fixed to the cap-removing motor 13 by bolts, and the cap-removing sensing piece 14 and the cap-removing stopper 12 are both fixed to the cap-removing horizontal plate 15 by bolts; the inner side of the positioning plate 161 is connected with the clamping card 163 and the neck clamp 162 in turn by fasteners to form an integral cap-removing unit that can slide back and forth along the cap-removing slide rail 27; the working position is determined under the induction and positioning of the cap-removing sensing piece 14 and the cap-removing stopper 12, the positioning plate 161 moves the sample tube 18 in the sample stacking plate 19 so that the sample tube 18 is in the middle position, the neck clamp 162 is used to clamp the neck of the sample tube cap 17, and the cap-removing is moved along the cap-removing slide rail 27 under the drive of the cap-removing motor 13, and the cap-removing clamping card 163 clamps the removed sample tube cap 17.

[0038] Furthermore, the capping unit 16 is provided with a pair, which are symmetrically arranged at the two ends of the capping slide rail 27. Under the drive of the capping motor 13, they move towards each other to clamp the necks of the two ends of the sample tube 18, and move oppositely to remove the caps from the two ends of the sample tube 18. Under the drive of the capping motor 13, the clamping card 163 and the neck card 162 realize the capping action.

[0039] The sealing device includes a capping unit 11, which includes a sample tube joint 113, a sealing ring 111 and a sealing nut 112. The capping unit 11 is provided with a pair, which is installed at the other end of the capping horizontal plate 15 and symmetrically arranged at the two ends of the capping slide rail 27. Under the drive of the capping motor 13, the caps are put on the two ends of the sample tube in opposite directions to complete the air path sealing.

[0040] Furthermore, the capping unit 11 is sealedly connected to the mouth of the sample tube 18 after the cap is removed through the sample tube joint 113, the sealing ring 111, and the sealing nut 112, and is connected to the six-way valve 22, the capture trap 23 and the detection device (not shown in the figure) to form a sealed air path.

[0041] The transfer device includes a grasping unit for moving the sample tube 18 from the sample stacking plate 19 to a preset position of the capping unit, and for transferring the sample tube 18 after the cap is removed to a preset position of the capping unit.

[0042] The control device includes a touch screen 26, which intelligently controls the driving device through a preset program: the sample tray motor 21 is controlled to drive the sample stacking tray 19 to carry the sample tube 18 containing the sample placed in the preset positioning mark 20 to rotate to the preset position, and under the drive of the uncapping motor 13, the uncapping unit 16 slides along the uncapping slide rail 27, and the positioning plates 161 at both ends move the sample tube 18 in the sample stacking tray 19 so that the sample tube 18 is in the middle position, and the module 1 controls the module slider 3 to move to the sensing position of the rear photoelectric switch 6, and the module 1 controls the grabbing motor 7 to execute the command, and the grabbing motor 7 controls the grabbing claw 9 to open and embrace the sample tube 18, and then clamps the sample tube 18 and shifts it to the uncapping preset position. Driven by the uncapping motor 13, the neck clamp 162 clamps the neck of the sample tube 18, and the two uncapping units 16 slide up and down along the uncapping slide rail 27 to complete the uncapping. The clamping clamp 163 clamps the uncapped sample tube cap 17. Under the control of the module 1, the grabbing claw 9 places the sample tube 18 in a preset sealing position. The capping unit 11 moves along the uncapping slide rail 27 with the uncapping horizontal plate 15 under the control of the uncapping motor 13, and seals the two ports of the sample tube 18 from the upper and lower directions. After being connected to the six-way valve 22, the capture trap 23 and the detection device (not shown) through the sample tube connector 113, a sealed air path is formed; under the control of the module 1, the module slider 3 returns to the front photoelectric switch 2 to inductively stop.

[0043] It should be noted that after the sealed gas path is tested for air tightness and passes, the program controls the desorption furnace module 25 to control the desorption furnace 24 to move to a preset position, heats the sample tube 18 for primary desorption, and can perform secondary desorption according to user needs.

[0044] The beneficial effects are:

[0045] The invention provides a full-automatic thermal desorption sealed sampling device. The device is provided with a capping device to position a sample tube at a preset position in a sample stacking plate so that the sample tube is located in the middle position, and then the caps at both ends of the positioned sample tube are removed. The transfer device is provided to take the positioned sample tube out of the sample stacking plate and place it at a capping position preset by a capping unit under the control of a program, and the sample tube after the capping is transferred to a capping position preset by a sealing device, so that the capping unit installs sample tube joints at both ends of the sample tube to complete the sealing of the gas path. The process is performed by sliding along a slide rail, and the driving device is intelligently controlled according to a preset program by a control device provided, so that the capping process of capping, sample tube displacement and sample tube joint installation is not only accurately controlled, but also avoids the use of needles and sealing pads, and completely solves the problems of large transmission error, easy damage to sealing performance and high use cost.

[0046] The above description shows and describes the preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A fully automatic thermal desorption sealed sampling device, characterized in that: include: A capping device, used for positioning the sample tubes in the sample stacking tray and removing the caps of the positioned sample tubes, comprises a capping unit; A sealing device, used for capping the sample tube after the cap is removed to complete the gas path sealing, including a capping unit; A transfer device, used to transfer the sample tube from the sample stacking plate to a preset position of the capping unit, and to transfer the sample tube after the cap is removed to a preset position of the capping unit, including a gripping unit; A driving device, used to drive the capping device, the sealing device, and the transfer device to execute instructions respectively, including a driving unit; Control device: intelligently controlling the driving device through a program; The decapping unit comprises a decapping clamping part and a positioning plate for positioning the sample tube before decapping, the positioning plate being located outside the decapping clamping part; The cap-removing and clamping part comprises a cap-removing horizontal plate, one end of which is provided with a neck clamp which can be clamped on the neck of the sample tube, and a clamping card for clamping the cap is fixedly installed between the neck clamp and the positioning plate; The sealing device comprises a capping unit, which comprises a sample tube joint, a sealing ring and a sealing nut. A pair of capping units are arranged and installed at the other end of the capping transverse plate.

2. The fully automatic thermal desorption sealed sampling device according to claim 1, characterized in that: The cap-removing device further comprises a cap-removing slide rail, and the cap-removing unit reciprocates along the cap-removing slide rail under the drive of the cap-removing motor.

3. The fully automatic thermal desorption sealed sampling device according to claim 2 is characterized in that: The cap-removing unit is provided with a pair, which is symmetrically arranged at the two ends of the cap-removing slide rail. Under the drive of the cap-removing motor, the cap-removing units move toward each other to clamp the necks of the two ends of the sample tube, and move in the opposite direction to remove the caps from the two ends of the sample tube.

4. The fully automatic thermal desorption sealed sampling device according to claim 2, characterized in that: A pair of capping units are installed at the other end of the capping horizontal plate and are symmetrically arranged at the two ends of the capping slide rail. Driven by the capping motor, the two ends of the sample tube are capped in opposite directions to complete the gas path sealing.

5. The fully automatic thermal desorption sealed sampling device according to claim 4, characterized in that: The capping unit comprises a sample tube joint for sealing the mouth of the sample tube, and the sample tube joint is connected to the detection device through an air path.

6. The fully automatic thermal desorption sealed sampling device according to claim 2, characterized in that: The transfer device also includes a transfer slide rail vertically arranged with respect to the cap removal slide rail. Under the control of the tube clamp arm slide module, the grabbing unit reciprocates along the transfer slide rail to complete the grabbing and displacement of the sample tube.

7. The fully automatic thermal desorption sealed sampling device according to claim 6, characterized in that: The driving unit includes a motor, which also includes a grabbing motor for controlling the opening and closing of the grabbing unit, a turntable motor for controlling the rotation of the sample stacking plate, and a desorption furnace module for controlling the desorption furnace to move to the capping position for heating. The grabbing motor is connected to the tube clamp arm slide module.

8. The fully automatic thermal desorption sealed sampling device according to claim 7, characterized in that: The control device comprises a touch screen, and the driving device is intelligently controlled by the touch screen.

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