Automatic sampling device of adsorption tube for thermal desorption instrument

Abstract

The utility model discloses an adsorption tube automatic sampling device for a thermal desorption instrument, and relates to the technical field of thermal desorption instruments. The automatic sampling device for the adsorption pipe for the thermal desorption instrument comprises a fixing frame, a fixing block is arranged in the fixing frame, a support is arranged at the top of the fixing block, a placing plate is arranged at the top of the support, an adsorption pipe fitting is movably connected into the placing plate, an overturning assembly is arranged in the fixing frame, and the overturning assembly is movably connected with the adsorption pipe fitting. The overturning assembly comprises a first motor, a movable block and a sliding block, and the first motor is fixed to one side of the fixing frame. A first motor on the overturning assembly drives a movable plate to rotate, the movable plate drives a fixed block to rotate, adsorption pipe fittings on a containing plate can be made to be in the vertical direction, a second motor on the moving assembly drives a gear to drive a tooth frame to move on the surface of a movable frame, and the fixed block can move up and down; the adsorption pipe fitting on the placing plate can be placed into the instrument body in the vertical direction, and the labor intensity of a user can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal desorbers, in particular to an automatic sample introduction device for an adsorption tube used in a thermal desorber. Background Art

[0002] A thermal desorber is an analytical instrument used in the fields of environmental science and resource science. It is primarily used for the analysis of volatile and semi-volatile organic compounds (VOCs). It is an essential pretreatment device in VOCs analysis laboratories. Its function is to heat and purge the VOCs adsorbed in the adsorption tube, enrich them in a cold trap, and then send them to a gas chromatograph for sample pretreatment and concentration using physical or chemical adsorption methods, followed by gas chromatography analysis.

[0003] Thermal desorber adsorption tubes require a sample feeder to hold and move the tubes. Existing adsorption tube sample feeders can only feed horizontally placed tubes. These horizontally placed tubes are designed with upper and lower layers, requiring manual insertion into the instrument, increasing the user's labor intensity. To address this issue, we offer an automatic sample feeder for thermal desorber adsorption tubes to address this issue. Utility Model Content

[0004] The utility model aims to provide an automatic adsorption tube sample feeding device for a thermal desorber, which solves the problem of inconvenient material feeding in the adsorption tube sample feeding device in the prior art by cooperating with a flip component and a moving component.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is an automatic sampling device for adsorption tubes for thermal desorption instruments, comprising a fixing frame, a fixing block is provided inside the fixing frame, a bracket is provided on the top of the fixing block, a placement plate is provided on the top of the bracket, and an adsorption tube is movably connected inside the placement plate;

[0007] A flip assembly is provided inside the fixing frame, and the flip assembly includes a first motor, a movable block and a slider. The first motor is fixed to one side of the fixing frame, and the first motor shaft passes through the inside of the fixing frame and is fixedly connected to a movable plate. The other side of the movable plate is movably connected to the surface of the fixing block through a pin shaft, and one side of the slider is movably connected to the inner wall of the fixing frame, and the other side of the slider is fixed to one side of the fixing block.

[0008] A moving assembly is provided on the top of the fixed block, and the moving assembly includes a gear rack, a second motor and a movable frame. The second motor and the movable frame are both fixed to the top of the fixed block. The second motor shaft is fixedly connected to a gear engaged with the surface of the gear rack. The surface of the movable frame is movably connected to the inner wall of the gear rack, and the top of the gear rack is fixedly connected to the bottom of the bracket.

[0009] By adopting the above technical solution, an opening is provided on the front side of the fixed frame, sliders are installed on the rear sides of both sides of the fixed block, a rotating rod and a first motor are respectively installed on the front sides of both sides of the fixed frame, the bracket is installed between the placement plate and the fixed block, and openings are also provided on the front and rear sides of the bracket. The placement plate includes a horizontal plate and a sleeve plate for placing the adsorption tube fittings, and the adsorption tube fittings can be placed in the slots opened on the sleeve plate. The movable plate is a rectangular object and is installed between the fixed frame and the fixed block. The movable frame is installed on the gear rack so that the movable frame can move on the gear rack.

[0010] The utility model is further configured to include a clamping assembly, which includes a third motor, a screw and a clamping plate. The third motor is fixed to the top of the bracket, one end of the screw is fixed to both ends of the output shaft of the third motor, and the other end of the screw is movably connected to the inner wall of the bracket, the clamping plate is threadedly connected to the surface of the screw, and the surface of the clamping plate is in contact with the top of the placement plate.

[0011] By adopting the above technical solution, the third motor is installed at the top center of the bracket, with two screws. The third motor adopts a dual-axis motor, and a splint is installed on each of the two screws. The rotating screw drives the splint to move on the top of the placement plate.

[0012] The utility model is further configured such that connecting plates are fixedly connected on both sides of the placement plate, a clamping block is movably connected inside the connecting plate, one side of the clamping block contacts the surface of the adsorption tube, one side of the connecting plate is fixedly connected to a support rod, a spring is sleeved on the surface of the support rod, and both sides of the spring are fixedly connected to the connecting plate and the clamping block respectively.

[0013] By adopting the above technical solution, the spring exerts force on the connecting plate, causing the clamping block to move, and the clamping block clamps and fixes the surface of the adsorption tube, making it easier to fix the adsorption tube in the placement plate.

[0014] The present invention is further configured such that the other end of the support rod passes through the outside of the clamping block and is fixedly connected to a stopper, and the stopper is circular.

[0015] By adopting the above technical solution, the circular stopper can limit the moving distance of the clamping block on the support rod.

[0016] The present invention is further configured such that sliding grooves are provided on both sides of the interior of the fixing frame, and the surface of the sliding block is slidably connected to the inner wall of the sliding groove.

[0017] By adopting the above technical solution, the slide groove is vertically arranged in the fixing frame, so that the slider can move in the slide groove.

[0018] The present invention is further configured such that a clamping groove is provided inside the gear rack, and an inner wall of the clamping groove is movably connected to the surface of the movable rack.

[0019] By adopting the above technical solution, the clamping groove is located between the gear rack and the bracket, and a part of the gear rack is sleeved in the clamping groove, which can provide limited support for the gear rack.

[0020] The present invention is further configured such that grooves are provided on both sides of the interior of the bracket, and the bottom of the splint is movably connected to the interior of the groove.

[0021] By adopting the above technical solution, the groove can limit the moving distance of the splint.

[0022] The present invention is further configured such that a rotating rod is fixedly connected to the other side of the fixing block, and the other end of the rotating rod is movably connected to the inner wall of the fixing frame.

[0023] By adopting the above technical solution, the rotating rod supports the fixed block, making the rotation of the fixed block more stable.

[0024] The utility model has the following beneficial effects:

[0025] 1. The utility model adopts the first motor on the flip assembly to drive the movable plate to rotate, and the movable plate drives the fixed block to rotate, which can make the adsorption tube fittings on the placement plate be in a vertical direction. The second motor on the movable assembly drives the gear to drive the gear rack to move on the surface of the movable rack, which can make the fixed block move up and down, so that the adsorption tube fittings on the placement plate can be placed in the instrument body in a vertical direction, which can reduce the labor intensity of the user.

[0026] 2. The utility model adopts the third motor on the clamping assembly to drive the screw to rotate, and the screw drives the two clamping plates to clamp and fix the placement plate. By using the cooperation of the spring, the support rod and the connecting plate, the clamping block can fix the adsorption pipe fitting placed in the placement plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0028] Figure 1 This is a structural stereogram of the automatic sampling device for adsorption tubes used in thermal desorption instruments;

[0029] Figure 2 This is a structural diagram of the clamping assembly in the automatic sampling device for adsorption tubes used in thermal desorbers;

[0030] Figure 3 This is a structural diagram of the fixing frame in the automatic sampling device for adsorption tubes used in thermal desorption instruments;

[0031] Figure 4 This is a structural diagram of the moving components in the automatic sampling device for adsorption tubes used in thermal desorbers;

[0032] Figure 5Automatic sampling device for adsorption tubes used in thermal desorption instruments Figure 1 A magnified view of the middle panel.

[0033] In the accompanying drawings: 1. fixed frame; 2. fixed block; 3. bracket; 4. placement plate; 5. adsorption tube; 6. first motor; 7. movable block; 8. slider; 9. movable plate; 10. gear rack; 11. second motor; 12. movable frame; 13. third motor; 14. screw; 15. clamping plate; 16. connecting plate; 17. clamping block; 18. support rod; 19. spring; 20. stop block; 21. slide groove; 22. slot; 23. groove; 24. rotating rod; 25. gear. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Specific embodiments

[0035] See also Figure 1-Figure 5 The utility model is an automatic sampling device for adsorption tubes for thermal desorption instrument, including a fixed frame 1, a fixed block 2 is provided inside the fixed frame 1, a bracket 3 is provided on the top of the fixed block 2, a placement plate 4 is provided on the top of the bracket 3, an adsorption tube 5 is movably connected inside the placement plate 4, a flip assembly is provided inside the fixed frame 1, and the flip assembly includes a first motor 6, a movable block 7 and a slider 8. The first motor 6 is fixed to one side of the fixed frame 1, and the rotating shaft of the first motor 6 passes through the inside of the fixed frame 1 and is fixedly connected to the movable plate 9. The other side of the movable plate 9 is connected by The pin is movably connected to the surface of the fixed block 2, one side of the slider 8 is movably connected to the inner wall of the fixed frame 1, and the other side of the slider 8 is fixed to one side of the fixed block 2. A moving component is provided on the top of the fixed block 2, and the moving component includes a gear rack 10, a second motor 11 and a movable frame 12. The second motor 11 and the movable frame 12 are both fixed to the top of the fixed block 2. The rotating shaft of the second motor 11 is fixedly connected to a gear 25 engaged with the surface of the gear rack 10. The surface of the movable frame 12 is movably connected to the inner wall of the gear rack 10, and the top of the gear rack 10 is fixedly connected to the bottom of the bracket 3.

[0036] Specifically: an opening is provided on the front side of the fixed frame 1, sliders 8 are installed on the rear sides of the fixed block 2, rotating rods 24 and first motors 6 are respectively installed on the front sides of the fixed frame 1, the bracket 3 is installed between the placement plate 4 and the fixed block 2, and openings are also provided on the front and rear sides of the bracket 3. The placement plate 4 includes a horizontal plate and a sleeve plate for placing the adsorption tube 5, and the adsorption tube 5 can be placed in the slot opened on the sleeve plate. The movable plate 9 is a rectangular object and is installed between the fixed frame 1 and the fixed block 2. The movable frame 12 is installed on the tooth frame 10 so that the movable frame 12 can move on the tooth frame 10. Specific embodiments

[0037] See also Figure 1-Figure 5 On the basis of the specific embodiment 1, it also includes a clamping assembly, which includes a third motor 13, a screw 14 and a clamping plate 15. The third motor 13 is fixed to the top of the bracket 3, one end of the screw 14 is fixed to both ends of the output shaft of the third motor 13, and the other end of the screw 14 is movably connected to the inner wall of the bracket 3. The clamping plate 15 is threadedly connected to the surface of the screw 14, and the surface of the clamping plate 15 contacts the top of the placement plate 4. Both sides of the placement plate 4 are fixedly connected with a connecting plate 16, and a clamping block 17 is movably connected inside the connecting plate 16. One side of the clamping block 17 contacts the surface of the adsorption tube 5, and one side of the connecting plate 16 is fixedly connected to a support rod 18. The surface of the support rod 18 A spring 19 is sleeved, and both sides of the spring 19 are fixedly connected to the connecting plate 16 and the clamping block 17 respectively. The other end of the support rod 18 passes through the outside of the clamping block 17 and is fixedly connected to the stopper 20. The stopper 20 is circular, and slide grooves 21 are provided on both sides of the interior of the fixed frame 1. The surface of the slider 8 is slidably connected to the inner wall of the slide groove 21. A card slot 22 is provided inside the gear rack 10, and the inner wall of the card slot 22 is movably connected to the surface of the movable frame 12. Grooves 23 are provided on both sides of the interior of the bracket 3, and the bottom of the splint 15 is movably connected to the inside of the groove 23. The other side of the fixed block 2 is fixedly connected to a rotating rod 24, and the other end of the rotating rod 24 is movably connected to the inner wall of the fixed frame 1.

[0038] The third motor 13 is installed at the center of the top of the bracket 3, and there are two screws 14. The third motor 13 adopts a dual-axis motor. A clamping plate 15 is installed on each of the two screws 14. The rotating screw 14 drives the clamping plate 15 to move on the top of the placing plate 4. The spring 19 exerts force on the connecting plate 16 to make the clamping block 17 move, and the clamping block 17 clamps and fixes the surface of the adsorption tube 5, so that the adsorption tube 5 is easy to be fixed in the placing plate 4. The circular stopper 20 can limit the moving distance of the clamping block 17 on the support rod 18. The slide 21 is vertically arranged in the fixed frame 1, which can enable the slider 8 to move in the slide 21. The slot 22 is located between the tooth frame 10 and the bracket 3. A part of the tooth frame 10 is sleeved in the slot 22, which can limit and support the tooth frame 10. The groove 23 can limit the moving distance of the clamping plate 15, and the rotating rod 24 supports the fixed block 2, so that the fixed block 2 rotates more stably.

[0039] The working principle of the present utility model is as follows: first, the adsorption tube assembly is pressed between the two clamping blocks 17 and into the slot on the placement plate 4, and the third motor 13 is started. The third motor 13 drives the screw 14 to rotate, and the screw 14 drives the splint 15 to move, so that the two splints 15 fix the placement plate 4, and then the first motor 6 is started. The first motor 6 drives the movable plate 9 to rotate. With the cooperation of the slider 8, the movable plate 9 drives the fixed block 2 to perform a flipping motion, and then the second motor 11 is started. The second motor 11 drives the gear 25 to rotate, and the gear 25 drives the rack 10 to move, and the rack 10 drives the bracket 3 to move downward, and finally the third motor 13 is started again. The third motor 13 drives the screw 14 to rotate, and the screw 14 drives the splint 15 to move, so that the placement plate 4 falls vertically into the instrument body.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to only the specific implementation methods described. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can better understand and utilize the present invention.

Claims

1. An automatic sampling device for an adsorption tube for a thermal desorption instrument, comprising a fixing frame (1), characterized in that: A fixing block (2) is provided inside the fixing frame (1), a bracket (3) is provided on the top of the fixing block (2), a placement plate (4) is provided on the top of the bracket (3), and an adsorption pipe (5) is movably connected inside the placement plate (4); A flip assembly is provided inside the fixing frame (1), and the flip assembly includes a first motor (6), a movable block (7) and a slider (8). The first motor (6) is fixed to one side of the fixing frame (1). The rotating shaft of the first motor (6) passes through the inside of the fixing frame (1) and is fixedly connected to a movable plate (9). The other side of the movable plate (9) is movably connected to the surface of the fixing block (2) through a pin shaft. One side of the slider (8) is movably connected to the inner wall of the fixing frame (1), and the other side of the slider (8) is fixed to one side of the fixing block (2). A moving assembly is provided on the top of the fixed block (2), and the moving assembly includes a gear rack (10), a second motor (11) and a movable rack (12). The second motor (11) and the movable rack (12) are both fixed to the top of the fixed block (2). The rotating shaft of the second motor (11) is fixedly connected to a gear (25) meshing with the surface of the gear rack (10). The surface of the movable rack (12) is movably connected to the inner wall of the gear rack (10). The top of the gear rack (10) is fixedly connected to the bottom of the bracket (3).

2. The automatic sample introduction device for an adsorption tube for a thermal desorber according to claim 1, characterized in that: The clamping assembly further includes a third motor (13), a screw (14) and a clamping plate (15), wherein the third motor (13) is fixed to the top of the bracket (3), one end of the screw (14) is fixed to both ends of the output shaft of the third motor (13), and the other end of the screw (14) is movably connected to the inner wall of the bracket (3), and the clamping plate (15) is threadedly connected to the surface of the screw (14), and the surface of the clamping plate (15) contacts the top of the placement plate (4).

3. The automatic sample introduction device for an adsorption tube for a thermal desorber according to claim 1, characterized in that: Both sides of the placement plate (4) are fixedly connected to connecting plates (16), and a clamping block (17) is movably connected inside the connecting plate (16). One side of the clamping block (17) contacts the surface of the adsorption tube (5). One side of the connecting plate (16) is fixedly connected to a support rod (18), and a spring (19) is sleeved on the surface of the support rod (18). Both sides of the spring (19) are fixedly connected to the connecting plate (16) and the clamping block (17), respectively.

4. The automatic sample introduction device for an adsorption tube for a thermal desorber according to claim 3, characterized in that: The other end of the support rod (18) passes through the outside of the clamping block (17) and is fixedly connected to a stopper (20), and the stopper (20) is circular.

5. The automatic sampling device for adsorption tubes for thermal desorption apparatus according to claim 1, characterized in that: Slide grooves (21) are provided on both sides of the interior of the fixing frame (1), and the surface of the sliding block (8) is slidably connected to the inner wall of the slide groove (21).

6. The automatic sampling device for adsorption tubes for thermal desorption apparatus according to claim 1, characterized in that: A clamping groove (22) is provided inside the tooth frame (10), and an inner wall of the clamping groove (22) is movably connected to the surface of the movable frame (12).

7. The automatic sample introduction device for adsorption tubes for thermal desorption apparatus according to claim 2, characterized in that: Grooves (23) are provided on both sides of the interior of the bracket (3), and the bottom of the clamping plate (15) is movably connected to the interior of the groove (23).

8. The automatic sampling device for adsorption tubes for thermal desorption apparatus according to claim 1, characterized in that: The other side of the fixed block (2) is fixedly connected to a rotating rod (24), and the other end of the rotating rod (24) is movably connected to the inner wall of the fixed frame (1).

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