Headspace sampling device suitable for headspace bottles of multiple specifications

Abstract

A headspace sampling device suitable for headspace bottles of multiple specifications comprises a base, an inverted-L-shaped plate is fixedly installed on one side of the base, a sampling needle is installed on the inverted-L-shaped plate through a first electric push rod, the sampling needle can sample the headspace bottles, a containing table is arranged on the base, a motor is fixedly installed on the base, and an output shaft of the motor is fixedly connected with the containing table. A plurality of placing holes for placing headspace bottles are formed in the placing table, short pipes with closed bottoms are respectively arranged in the placing holes in a sliding manner, clamping devices for clamping the headspace bottles are arranged in the short pipes, first grooves communicated with the outside are respectively formed in the bottoms of the placing holes, the first grooves are communicated with the corresponding placing holes, and sliding rods are respectively arranged in the first grooves in a sliding manner. The headspace bottle height adjusting device is simple in structure, ingenious in conception, capable of adjusting the heights of headspace bottles which are different in specification and need to be sampled through one height adjusting mechanism, easy to operate, capable of reducing the production cost of the device, capable of meeting actual requirements and suitable for popularization.

Description

Technical Field

[0001] The utility model belongs to the technical field of chromatography detection, in particular to a head space sampling device suitable for head space bottles of multiple specifications. Background Art

[0002] Headspace sampling is a convenient and fast sample pretreatment method in gas chromatography. Its principle is to place the sample to be tested in a sealed container, a headspace bottle, and put it into a headspace sampling device. By heating, the volatile components are volatilized from the sample matrix, and equilibrium is achieved in the gas-liquid (or gas-solid) two-phase. The top gas is directly extracted for chromatographic analysis to test the composition and content of the volatile components in the sample. The headspace bottle used to prepare the headspace sample is an important component in the headspace sampling. However, due to the large number of specifications of headspace bottles, the traditional headspace sampling device can only be applied to headspace bottles of specific specifications. Empty bottles cannot meet the diverse requirements of analytical experiments; the patent with authorization announcement number CN216082627U: "A head space sampling device suitable for head space bottles of multiple specifications" discloses a sampling device that can be used for head space bottles of different heights. However, when the device is in use, a set of height adjustment mechanisms are set under each head space bottle, and each set of height adjustment mechanisms includes a separate driving member, which makes the device structure complicated and increases the production cost of the device. Therefore, we designed a head space sampling device with a simple structure that is suitable for head space bottles of multiple specifications. Utility Model Content

[0003] The utility model provides a head space sampling device suitable for head space bottles of multiple specifications, which is used to solve the defects in the prior art.

[0004] The utility model is achieved through the following technical solutions:

[0005] The top space sampling device according to claim 1, wherein the base has an inverted L-shaped plate fixedly mounted on one side of the base, and a sampling needle is mounted on the inverted L-shaped plate through a first electric push rod, and the sampling needle can sample the top space bottle; the base is provided with a placement platform, a motor is fixedly mounted on the base, and an output shaft of the motor is fixedly connected to the placement platform; a plurality of placement holes for placing the top space bottles are provided on the placement platform, short tubes with closed bottoms are slidably mounted in the placement holes, a clamping device for clamping the top space bottle is provided in the short tubes, a first groove communicating with the outside is provided at the bottom of the placement hole, the first groove is communicated with the corresponding placement hole, a sliding rod is slidably mounted in the first groove, and the sliding rod is connected to the placement platform by a first spring; a second electric push rod is provided below the sampling needle, the second electric push rod is fixedly mounted on the base, a horizontal plate is fixedly mounted on the movable end of the second electric push rod, inclined plates are fixedly mounted on the front and back sides of the horizontal plate, and the sliding rod can contact the inclined plate and the horizontal plate.

[0006] As described above, a head space sampling device suitable for head space bottles of multiple specifications, the clamping device includes a short tube with several second grooves formed on the inner wall, and clamping blocks are slidably installed in the second grooves. The clamping blocks are connected to the corresponding second grooves by a second spring, and the upper end of the clamping block is an inclined surface.

[0007] As described above, a head space sampling device suitable for head space bottles of multiple specifications is provided with slide grooves on both sides of the placement hole, and sliders are slidably installed in the slide grooves, and the sliders are fixedly installed on the corresponding short tubes.

[0008] As described above, a head space sampling device suitable for head space bottles of multiple specifications is provided with a dovetail chute on one side of the second groove, and dovetail sliders are slidably installed in the dovetail chute, and the dovetail sliders are fixedly installed on the corresponding clamping blocks.

[0009] As described above, in the head space sampling device suitable for head space bottles of multiple specifications, the bottom end of the slide bar is fixedly mounted with a support plate, and the bottom side of the support plate is rotatably mounted with support wheels.

[0010] As described above, a head space sampling device suitable for head space bottles of multiple specifications is provided, wherein the controller is fixedly mounted on the base, the height sensor is fixedly mounted on the inverted L-shaped plate, and the height sensor and the second electric push rod are both connected to the controller circuit.

[0011] The advantages of the utility model are: the utility model has a simple structure and an ingenious design. Through a height adjustment mechanism, the height of headspace bottles of different specifications that need to be sampled can be adjusted. The operation is simple, the production cost of the device is reduced, the actual needs can be met, and it is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0013] Figure 1 It is a structural diagram of the utility model; Figure 2 yes Figure 1 A-direction view; Figure 3 yes Figure 1 B-direction view; Figure 4 yes Figure 1 C-direction view; Figure 5 yes Figure 3 Partial enlarged view of Ⅰ; Figure 6 yes Figure 1 Ⅱ partial enlarged view; Figure 7 It is a principle diagram of the present utility model.

[0014] Figure numerals: 1. base, 2. inverted L-shaped plate, 3. first electric push rod, 4. sampling needle, 5. placement table, 6. motor, 7. placement hole, 8. short tube, 9. first groove, 10. slide rod, 11. first spring, 12. second electric push rod, 13. horizontal plate, 14. inclined plate, 20. second groove, 21. clamping block, 22. second spring, 30. slide groove, 31. slider, 40. dovetail slide groove, 41. dovetail slider, 50. support plate, 51. support wheel, 60. controller, 61. height sensor. DETAILED DESCRIPTION

[0015] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0016] A headspace sampling device suitable for headspace bottles of multiple specifications, such as Figure 1 、 2As shown in , 3, 4, 5, 6, and 7, it includes a base 1, an inverted L-shaped plate 2 is fixedly installed on one side of the base 1, a sampling needle 4 is installed on the inverted L-shaped plate 2 through a first electric push rod 3, the fixed end of the first electric push rod 3 is fixedly installed on the inverted L-shaped plate 2, and the movable end of the first electric push rod 3 is fixedly installed on the sampling needle 4, and the sampling needle 4 can sample the top space bottle, and a placing table 5 is provided on the base 1, a motor 6 is fixedly installed on the base 1, and the output shaft of the motor 6 is fixedly connected to the placing table 5, and the placing table 5 is coaxially arranged with the output shaft of the motor 6, and several placing holes 7 for placing the top space bottles are provided on the placing table 5, and the several placing holes 7 are evenly distributed along the circumference, and short tubes 8 with closed bottoms are respectively slidably installed in the placing holes 7, and the short tubes 8 can only slide up and down in the placing holes 7, and a clamping device for clamping the top space bottle is provided in the short tube 8, and the placing holes The bottom of the sampler 4 is provided with a first groove 9 connected to the outside, the first groove 9 is connected to the corresponding placement hole 7, a slide rod 10 is slidably installed in the first groove 9, and the slide rod 10 is connected to the placement platform 5 by a first spring 11. The first spring 11 is sleeved on the outer periphery of the slide rod 10, one end of the first spring 11 is fixedly connected to the bottom side of the placement platform 5, and the other end of the first spring 11 is fixedly connected to the outer periphery of the slide rod 10. A second electric push rod 12 is provided below the sampling needle 4, and the second electric push rod 12 is fixedly installed on the base 1. The fixed end of the second electric push rod 12 is fixedly installed on the base 1, and the movable end of the second electric push rod 12 is fixedly installed on the horizontal plate 13. The front and rear sides of the horizontal plate 13 are fixedly installed with inclined plates 14. The two inclined plates 14 are symmetrically distributed front and back. The slide rod 10 can contact the inclined plates 14 and the horizontal plate 13. The utility model has a simple structure and an ingenious design. Through a height adjustment mechanism, the height of the headspace bottles of different specifications that need to be sampled can be adjusted. The operation is simple, the production cost of the device is reduced, the actual needs can be met, and it is suitable for promotion.When using the utility model, first place the base 1 to a suitable position, put the head space bottle to be tested into the short tube 8, control the clamping device to clamp the head space bottle, then energize the motor 6, and the output shaft of the motor 6 drives the placement table 5 to rotate. During the rotation of the placement table 5, the slide bar 10 corresponding to the short tube 8 that is about to be rotated below the sampling needle 4 gradually contacts the inclined plate 14, and the slide bar 10 moves upward. The first spring 11 is compressed, and the short tube 8 moves upward under the action of the slide bar 10 until the slide bar 10 contacts the cross plate 13. At this time, the slide bar 10 no longer moves upward. When the head space bottle is located directly below the sampling needle, the motor 6 is controlled to stop rotating. If it is necessary to continue to adjust the height of the head space bottle, the second electric push rod 12 is controlled to extend or shorten. , the movable end of the second electric push rod 12 drives the cross plate 13 and the inclined plate 14 to move upward or downward. At this time, the slide bar 10 can continue to move upward or downward, thereby changing the height of the head space bottle. When the appropriate height is reached, the second electric push rod 12 is controlled to stop moving. At this time, the movable end of the first electric push rod 3 is controlled to drive the sampling needle 4 to move downward, pierce the head space bottle to sample the sample in the head space bottle. After the sampling is completed, the first electric push rod 3 is controlled to drive the sampling needle 4 to move upward. When the sampling needle 4 moves to the appropriate height, the motor 6 is controlled to continue to rotate to sample the next head space bottle. After the slide bar 10 corresponding to the sampled head space bottle is separated from the inclined plate 14, it can drive the head space bottle and the short tube 8 to reset under the action of the first spring 11.

[0017] Specifically, as shown in the figure, the clamping device of this embodiment includes a plurality of second grooves 20 formed on the inner wall of the short tube 8. The plurality of second grooves 20 are distributed circumferentially. In this embodiment, each short tube 8 is provided with three second grooves 20. A clamping block 21 is slidably mounted in each second groove 20. The clamping block 21 can only slide within the corresponding second groove 20. The clamping block 21 and the corresponding second groove 20 are connected by a second spring 22. One end of the second spring 22 is fixedly connected to one side of the clamping block 21, and the other end of the second spring 22 is fixedly connected to the inner wall of the second groove 20. The upper end of the clamping block 21 is an inclined surface. When the headspace bottle 3 is placed into the short tube 8, the bottom of the headspace bottle contacts the inclined surface of the clamping block 21, pushing the clamping block 21 toward the inner wall of the short tube 8, compressing the second spring 22. When the headspace bottle 3 is fully placed into the short tube 8, the clamping block 21, under the action of the second spring 22, clamps the headspace bottle.

[0018] Specifically, as shown in the figure, the placement hole 7 of this embodiment has two sides provided with a slide groove 30, and a slider 31 is slidably installed in each of the slide grooves 30. The slider 31 is fixedly mounted on the corresponding short tube 8. When the short tube 8 slides in the placement hole 7, the slider 31 slides in the corresponding slide groove 30, limiting the position of the short tube 8 and preventing the short tube 8 from moving out of the placement hole 7.

[0019] Furthermore, as shown in the figure, in this embodiment, a dovetail chute 40 is provided on one side of the second groove 20. Dovetail sliders 41 are slidably mounted in the dovetail chute 40, and the dovetail sliders 41 are fixedly mounted on the corresponding clamping block 21. When the clamping block 21 moves in the groove 30, the dovetail sliders 41 slide in the corresponding dovetail chute 40, limiting the position of the clamping block 21, making the movement of the clamping block 21 more stable, and preventing the clamping block 21 from completely moving out of the second groove 20.

[0020] Furthermore, as shown in the figure, the bottom end of the slide bar 10 of this embodiment is fixedly mounted with a support plate 50, and the bottom side of the support plate 50 is rotatably mounted with support wheels 51. The support wheels 51 are fixedly mounted on a transverse shaft, and the ends of the transverse shaft are rotatably connected to the inner holes of the shaft seats through bearings, and the shaft seats are fixedly mounted on the corresponding support plates 50. The support wheels 51 can convert the sliding friction between the slide bar 10 and the inclined plate 14 and the transverse plate 13 into rolling friction, which can reduce friction and reduce wear on the slide bar 10, the inclined plate 14, and the transverse plate 13.

[0021] Furthermore, as shown in the figure, a controller 60 is fixedly mounted on the base 1 of the present embodiment, and a height sensor 61 is fixedly mounted on the inverted L-shaped plate 2. The height sensor 61 and the second electric push rod 12 are both electrically connected to the controller 60. The height sensor 61 can detect the height of the headspace bottle. When it is detected that the height of the headspace bottle is too high, the information is fed back to the controller 60. The controller 60 controls the second electric push rod 12 to shorten until the headspace bottle moves to the appropriate height, and then controls the second electric push rod 12 to stop working. When it is detected that the height of the headspace bottle is too low, the second electric push rod 12 is controlled to extend, driving the headspace bottle to move to the appropriate height.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A headspace sampling device suitable for headspace bottles of multiple specifications, comprising a base (1), an inverted L-shaped plate (2) fixedly mounted on one side of the base (1), a sampling needle (4) mounted on the inverted L-shaped plate (2) via a first electric push rod (3), the sampling needle (4) being capable of sampling the headspace bottle, a placement table (5) being provided on the base (1), a motor (6) fixedly mounted on the base (1), an output shaft of the motor (6) being fixedly connected to the placement table (5), a plurality of placement holes (7) for placing the headspace bottles being provided on the placement table (5), and characterized in that: A short tube (8) with a closed bottom is slidably installed in each placement hole (7), and a clamping device for clamping the top empty bottle is provided in the short tube (8). A first groove (9) communicating with the outside is provided at the bottom of each placement hole (7), and the first groove (9) is communicated with the corresponding placement hole (7). A slide rod (10) is slidably installed in the first groove (9), and the slide rod (10) is connected to the placement table (5) through a first spring (11). A second electric push rod (12) is provided below the sampling needle (4), and the second electric push rod (12) is fixedly installed on the base (1). A horizontal plate (13) is fixedly installed on the movable end of the second electric push rod (12), and an inclined plate (14) is fixedly installed on the front and rear sides of the horizontal plate (13). The slide rod (10) can contact the inclined plate (14) and the horizontal plate (13).

2. A head space sampling device suitable for head space bottles of multiple specifications according to claim 1, characterized in that: The clamping device comprises a short tube (8) with a plurality of second grooves (20) formed on the inner wall thereof, wherein clamping blocks (21) are respectively slidably installed in the second grooves (20), the clamping blocks (21) are connected to the corresponding second grooves (20) via a second spring (22), and the upper end of the clamping block (21) is an inclined surface.

3. The head space sampling device suitable for head space bottles of multiple specifications according to claim 1, characterized in that: Slide grooves (30) are respectively provided on both sides of the placement hole (7), and sliders (31) are respectively slidably installed in the slide grooves (30), and the sliders (31) are respectively fixedly installed on the corresponding short tubes (8).

4. The head space sampling device suitable for head space bottles of multiple specifications according to claim 2, characterized in that: A dovetail chute (40) is provided on one side of the second groove (20), and dovetail sliders (41) are slidably installed in the dovetail chute (40), and the dovetail sliders (41) are fixedly installed on the corresponding clamping blocks (21).

5. The head space sampling device suitable for head space bottles of multiple specifications according to claim 1, characterized in that: The bottom end of the slide bar (10) is fixedly mounted with a support plate (50), and the bottom side of the support plate (50) is rotatably mounted with support wheels (51).

6. The head space sampling device suitable for head space bottles of multiple specifications according to claim 1, characterized in that: A controller (60) is fixedly mounted on the base (1), a height sensor (61) is fixedly mounted on the inverted L-shaped plate (2), and the height sensor (61) and the second electric push rod (12) are both connected to the controller (60) circuit.

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