CN216870160U - Purging and trapping double-needle sample introduction device - Google Patents
Purging and trapping double-needle sample introduction device Download PDFInfo
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- CN216870160U CN216870160U CN202220256614.6U CN202220256614U CN216870160U CN 216870160 U CN216870160 U CN 216870160U CN 202220256614 U CN202220256614 U CN 202220256614U CN 216870160 U CN216870160 U CN 216870160U
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Abstract
The utility model relates to the technical field of pretreatment of volatile organic compounds, in particular to a purging and trapping double-needle sample introduction device, which is characterized in that a vertically-installed slide way, a module sliding block sliding along the slide way, a cup holder fixedly connected with the module sliding block and used for holding sample bottles, and sampling needles fixedly arranged at the top of the slide way and corresponding to the sample bottles are arranged, wherein two ends of the cup holder are horizontally and symmetrically provided with two sample cups for holding the sample bottles, and the two corresponding sampling needles are vertically and respectively superposed with the central axis of the sample bottles; elastic pressing plate devices are respectively arranged between the sample cup and the module sliding block; the device simultaneously designs the independent water sample injection needle and the soil sample injection needle, not only can respectively detect the soil sample and the water sample, but also can respectively walk corresponding independent flow paths during detection, thereby effectively avoiding cross contamination and effectively reducing the use cost.
Description
Technical Field
The utility model relates to the technical field of pretreatment of volatile organic compounds, in particular to a purging and trapping double-needle sample introduction device.
Background
The purging and trapping method belongs to the field of gas phase extraction, and is characterized by that it uses nitrogen gas, helium gas or other inert gas to extract the tested object from sample, makes the gas continuously pass through the sample, extracts the volatile component from the sample, traps it in adsorbent or cold trap, then makes analysis and measurement so as to obtain the invented non-equilibrium continuous extraction method. Therefore, the purge-trap method is also called a dynamic headspace concentration method.
At present, part of products adopt a solid and liquid integrated single sample injection needle sweeping and trapping mode, and the mode has the risk of sample cross contamination; a sampling mode of independently detecting a water sample or independently detecting two pieces of soil sample equipment is adopted for part of products, so that the risk of sample cross contamination is avoided, and the use cost is greatly improved.
In view of the above problems, no effective solution has been proposed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects and shortcomings of the prior art, the utility model provides a purging and trapping double-needle sampling device, which is characterized in that a vertically-installed slide way, a module sliding block sliding along the slide way, a cup holder fixedly connected with the module sliding block and used for holding sample bottles, and sampling needles fixedly arranged at the top of the slide way and corresponding to the sample bottles are arranged, wherein two ends of the cup holder are horizontally and symmetrically provided with two sample cups for holding the sample bottles, and the two correspondingly-arranged sampling needles are vertically and respectively superposed with the central axis of the sample bottles; elastic pressure plate devices are respectively arranged between the sample cup and the module sliding block, the sliding way is a straight sliding way, and the lower end part of the straight sliding way is provided with a curved sliding way, so that when the module sliding block takes a sample bottle to go down through the straight sliding way after sampling is finished, the top end of the pressure plate presses the sample bottle cap tightly, a sampling needle is separated from the sample bottle cap, and when the module sliding block continues to go down to the curved sliding way, the top end of the pressure plate arranged on the elastic pressure plate devices leaves the bottle cap under the action of a torsion spring, so that the sample bottle can be conveniently taken and placed; the device simultaneously designs the independent water sample injection needle and the soil sample injection needle, not only can respectively detect the soil sample and the water sample, but also can respectively walk corresponding independent flow paths during detection, thereby effectively avoiding cross contamination and effectively reducing the use cost.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a purging and trapping double-needle sample introduction device is installed on a case and comprises a slide rail, a module sliding block, a cup holder, a sampling needle, a stepping motor and a control device, wherein the slide rail is vertically installed, the module sliding block slides along the slide rail, the cup holder is fixedly connected with the module sliding block and is used for holding sample bottles, the sampling needle is fixedly installed at the top of the slide rail and corresponds to the sample bottles, and the stepping motor is fixedly connected with the module sliding block;
two sample cups for containing the sample bottles are horizontally and symmetrically arranged at two ends of the cup holder, and the two correspondingly arranged sampling needles are respectively vertically superposed with the central axis of the sample bottles; an elastic pressure plate device is arranged between the sample cup and the module sliding block; the slide is the straight slideway, the lower tip of straight slideway is equipped with bent slide, makes and works as the module slider takes the sample bottle to go upward to during the straight slideway, the clamp plate top that the elastic pressure plate device was equipped with compresses tightly the sample bottle lid, down to during the bent slide, the clamp plate top that the elastic pressure plate device was equipped with leaves under the effect of torsional spring the sample bottle lid.
In some embodiments, the curved ramp is a concave ramp that is concave toward the interior of the ramp.
In some embodiments, two of the slide ways are arranged in parallel and respectively correspond to the sample cups.
In some embodiments, the elastic pressing plate device is provided with two pieces, which respectively correspond to the sample cups and comprise a torsion spring, a sample bottle pressing plate and a round bump which are connected together; the lower torsion plate that the torsional spring was equipped with is adorned admittedly on the glass stand, the upper torsion plate that the torsional spring was equipped with is in free state, sample bottle clamp plate with one side of upper torsion plate is connected, round convex block with the opposite side of upper torsion plate is connected, under the spring action of torsional spring, round convex block overlap joint is in all the time on the slide surface.
In some embodiments, the sample bottle pressing plate comprises a straight plate connected with the upper torsion plate and a curved plate located at the upper part of the straight plate, and a top pressing plate is arranged at the top of the curved plate.
In some embodiments, the end of the top pressure plate is provided with a concave arc, and the position of the concave arc enables the sampling needle not to contact with the top pressure plate.
In some embodiments, parallel to the slide, there is a module guide rail for movement of the module slide.
In some embodiments, the control device comprises a computer and a sensing device, wherein the sensing device comprises a photoelectric switch contact piece arranged on the module sliding block, and an upper limit photoelectric switch and a lower limit photoelectric switch which are respectively arranged at preset positions of the module guide rail; the computer is in control connection with the stepping motor and the sampling needle.
Advantageous effects
The utility model provides a purging and trapping double-needle sample introduction device which is characterized in that a vertically-installed slide way, a module sliding block sliding along the slide way, a cup holder fixedly connected with the module sliding block and used for holding sample bottles, and sampling needles fixedly arranged at the top of the slide way and corresponding to the sample bottles are arranged, wherein two ends of the cup holder are horizontally and symmetrically provided with two sample cups for holding the sample bottles, and the two corresponding sampling needles are vertically and respectively superposed with the central axis of the sample bottles; elastic pressure plate devices are respectively arranged between the sample cup and the module sliding block, the sliding way is a straight sliding way, and the lower end part of the straight sliding way is provided with a curved sliding way, so that when the module sliding block takes a sample bottle to go down through the straight sliding way after sampling is finished, the top end of the pressure plate presses the sample bottle cap tightly, a sampling needle is separated from the sample bottle cap, and when the module sliding block continues to go down to the curved sliding way, the top end of the pressure plate arranged on the elastic pressure plate devices leaves the bottle cap under the action of a torsion spring, so that the sample bottle can be conveniently taken and placed; the device simultaneously designs the independent water sample injection needle and the soil sample injection needle, not only can respectively detect the soil sample and the water sample, but also can respectively walk corresponding independent flow paths during detection, thereby effectively avoiding cross contamination and effectively reducing the use cost.
Drawings
Fig. 1 is a schematic structural view of a purging and trapping double-needle sample injection device provided in an embodiment of the present invention;
fig. 2 is a view taken along direction a of fig. 1.
Wherein the reference numbers indicate:
a sample bottle 1; a waste discharge adapter 2; a cup holder 3; a first sample cup 4; a second sample cup 5; a hinge 6; a second sample bottle pressing plate 7; a first sample bottle pressing plate 8; a top pressure plate 9; a lower limit photoelectric switch 10; a photoelectric switch contact 11; a module slider 12; a first slideway 13; a module guide rail 14; an upper limit photoelectric switch 15; an upper sealing fitting 16 for the sampling needle; a first sampling needle 17; a sampling needle fixing plate 18; the second sampling needle is provided with a sealing joint 19; a second sampling needle 20; a mounting hole 21; a sample bottle cap 22; a torsion spring 23; a lower torsion plate 24; an upper torsion plate 25; a round bump 26; a stepping motor 27; a straight slideway 28; a concave slideway 29; a guide post 30; a second slideway 31; a computer 32; a rotating shaft 33; a concave arc 34.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; in the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated; "plurality" means equal to or greater than two; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, the technical scheme of the utility model is as follows:
a blowing and trapping double-needle sample introduction device comprises a first slide rail 13 and a second slide rail 31 which are vertically and parallelly installed, a module sliding block 12 which slides along the first slide rail 13 and the second slide rail 31, and a cup holder 3 which is fixedly connected with the module sliding block 12 through a fastener, wherein two ends of the cup holder 3 are horizontally provided with two symmetrically arranged sample cups, namely a first sample cup 4 and a second sample cup 5 respectively, and the two sample cups are used for holding sample bottles; the sampling needle is firmly installed on a case (not shown in the figure) through an installation hole 21 and a fastener on the fixing plate 18 and is positioned at the upper ends of the first slideway 13 and the second slideway 31, and a sampling needle I17 and a sampling needle II 20 of the sampling needle are respectively superposed with a sample bottle contained in the first sample cup 4 and a sample bottle contained in the second sample cup 5 on the vertical central axis; elastic pressing plate devices are arranged between the sample cup I4 and the module sliding block 12 and between the sample cup II 5 and the module sliding block 12; and a stepping motor 27 connected with the module slide block 12 and a control device for controlling sampling action, including a computer 32 and a position sensing device.
The preferred embodiment of the utility model:
a purging and trapping double-needle sample introduction device comprises a vertically-installed slideway, wherein the slideway is provided with a first slideway 13 and a second slideway 31 which are installed in parallel, the slideway comprises a straight slideway 28, and the lower end part of the straight slideway 28 is provided with a concave slideway 29; the module sliding block 12 slides up and down along the first slide way 13 and the second slide way 31, and the lower end of the module sliding block 12 is fixedly connected with the stepping motor 27.
A cup holder 3 is fixedly connected with one side edge of the module sliding block 12 through a fastener, two symmetrically arranged sample cups, namely a sample cup I4 and a sample cup II 5, are horizontally arranged at two ends of the cup holder 3 and are used for containing sample bottles; the sampling needle comprises a first sampling needle 17 and a second sampling needle 20, the first sampling needle 17 and the second sampling needle 20 are fixedly mounted on a case (not shown in the figure) through a mounting hole 21 on the fixing plate 18 and a fastener, the first sampling needle 17 and the second sampling needle 20 are respectively positioned at the upper ends of the first slideway 13 and the second slideway 31, and the first sampling needle 17 and the second sampling needle 20 are respectively coincided with a sample bottle contained in the first sample cup 4 and a sample bottle contained in the second sample cup 5 on the vertical central axis; elastic pressing plate devices are respectively arranged between the first sample cup 4 and the module sliding block 12 and between the second sample cup 5 and the module sliding block 12.
The upper end of the first sampling needle 17 is fixedly provided with a first sampling needle upper sealing joint 16, and the upper end of the second sampling needle 20 is fixedly provided with a second sampling needle upper sealing joint 19.
The two elastic pressure plate devices are respectively arranged between the second sample cup 5 and the second slideway 31 and between the first sample cup 4 and the first slideway 13, and the structures are the same.
As shown in fig. 2, the structure is described by taking the elastic pressure plate device between the sample cup one 4 and the slide way one 13 as an example: the elastic pressure plate device comprises a torsion spring 23, a sample bottle pressure plate and a round convex block 26 which are connected together, and the torsion spring 23 is sleeved on the rotating shaft 33; the torsion spring 23 comprises a lower torsion plate 24 and an upper torsion plate 25, the lower torsion plate 24 is fixedly arranged on the cup holder 3 through a fastener, and the upper torsion plate 25 is in a free state. The first sample bottle pressure plate 8 is connected to one side, close to the first sample cup 4, of the upper torsion plate 25, the hinge 6 is movably sleeved on the rotating shaft 33, the hinge 6 is fixedly connected with the first sample bottle pressure plate 8, and the first sample bottle pressure plate 8 can rotate around the rotating shaft 33 through the hinge 6; the round convex block 26 is fixedly connected with one side, close to the first slideway 13, of the upper torsion plate 25, and under the elastic action of the torsion spring, the round end of the round convex block 26 is always attached to and overlapped on the surface of the first slideway 13 in a clinging manner.
The first sample bottle pressing plate 8 comprises a straight plate connected with the upper torsion plate 25 and a bent plate located on the upper portion of the straight plate, and a top pressing plate 9 is arranged at the top of the bent plate.
The end part of the top pressure plate 9 is provided with an inner concave arc 34, and the position of the inner concave arc 34 enables the first sampling needle 17 not to be in contact with the top pressure plate 9.
The second sample bottle pressing plate 7 and the first sample bottle pressing plate 8 are identical in structure and are not repeated.
In some embodiments, parallel to the slide, there are provided a module guide rail 14 and a guide post 30 for the module slide 12 to move up and down.
In some embodiments, the control device includes a computer 32 and a sensing device, the sensing device includes a photoelectric switch contact 11 mounted on the module slider 12, an upper limit photoelectric switch 15 and a lower limit photoelectric switch 10 respectively mounted at preset positions of the module guide rail 14; the computer 32 is in control connection with the stepping motor 27, the first sampling needle 17 and the second sampling needle 20.
The lower ends of the first sample cup 4 and the second sample cup 5 are respectively connected with a waste discharging adapter 2 connected with a waste discharging collector.
The specific working mode is as follows:
when a soil sample is detected, a sample supply system places a sample bottle 1 to be detected into a sample cup I4, a stepping motor 27 controls a module slide block 12 to drive the sample bottle 1 containing the soil sample to move upwards, a photoelectric switch contact piece 11 triggers an upper limit photoelectric switch 15, the module slide block 12 stops moving, a sampling needle I17 penetrates through a sealing cushion at the upper end of a sample bottle cap 22 to form a sealing flow path, a sampling module extracts a sample to be detected from the sample bottle 1 to finish a sampling process, the stepping motor 27 controls the module slide block 12 to drive the sample bottle 1 to move downwards under the control of a computer 32, as the upper part is a straight slide way 28, the round end of a round bump 26 is always in close contact with and overlapped on the surface of the slide way I13, the straight slide way 28 presses a jacking plate 9 of a sample bottle pressing plate I8 to tightly press the sample bottle cap 22, and along with the downward movement of the sample bottle 1 under the pressure of the jacking plate 9, the first sampling needle 17 is separated from the sealing cushion of the sample bottle cap 22, when the module sliding block 12 drives the sample bottle 1 to move downwards, the round end of the round bump 26 is lapped on the surface of the concave slideway 29, under the elastic action of the torsion spring 23, the upper torsion plate 25 drives the jacking plate 9 of the sample bottle pressing plate one 8 to leave the sample bottle cap 22, and when the photoelectric switch contact 11 triggers the lower limiting photoelectric switch 10, the module sliding block 12 stops moving.
When detecting the water sample, the process is the same when detecting soil sample, supply appearance system to place the sample bottle that needs detected in sample cup two 5, step motor 27 control module slider 12 drives sample bottle 1 that holds soil sample and upwards removes, limit photoelectric switch 15 on photoelectric switch contact 11 triggers, module slider 12 stop motion, two 20 run through the sealed cushion of sample bottle lid 22 this moment sampling needles, form sealed flow path, extract the sample that needs to detect from sample bottle by sampling module, accomplish the sampling process.
Claims (8)
1. A purging and trapping double-needle sample introduction device is installed on a case and is characterized by comprising a slide rail, a module sliding block, a cup holder, a sampling needle, a stepping motor and a control device, wherein the slide rail is vertically installed, the module sliding block slides along the slide rail, the cup holder is fixedly connected with the module sliding block and is used for holding sample bottles, the sampling needle is fixedly installed at the top of the slide rail and corresponds to the sample bottles, and the stepping motor is fixedly connected with the module sliding block;
two sample cups for containing the sample bottles are horizontally and symmetrically arranged at two ends of the cup holder, and the correspondingly arranged sampling needles are respectively vertically superposed with the central axis of the sample bottles; an elastic pressure plate device is arranged between the sample cup and the module sliding block; the lower tip of the straight slide of slide is equipped with bent slide, makes and works as the module slider takes the sample bottle to go upward during the straight slide, the clamp plate top that the elastic pressure plate device was equipped with compresses tightly the sample bottle lid, down extremely during the bent slide, the clamp plate top that the elastic pressure plate device was equipped with leaves under the effect of torsional spring the sample bottle lid.
2. The purge-and-trap dual needle sampling device according to claim 1, wherein the curved slide is a concave slide recessed towards the inside of the slide.
3. The purging and trapping double-needle sample introduction device according to claim 2, wherein two slide ways are arranged in parallel and respectively correspond to the sample cups.
4. The purging and trapping double-needle sample introduction device according to claim 1, wherein the elastic pressure plate device is provided with two pieces, corresponding to the sample cups respectively, and comprising a torsion spring, a sample bottle pressure plate and a round bump which are connected together; the lower torsion plate that the torsional spring was equipped with is adorned admittedly on the glass stand, the upper torsion plate that the torsional spring was equipped with is in free state, sample bottle clamp plate with one side of upper torsion plate is connected, round convex block with the opposite side of upper torsion plate is connected, under the spring action of torsional spring, round convex block overlap joint is in all the time on the slide surface.
5. The purging and trapping double-needle sample introduction device according to claim 4, wherein the sample bottle pressing plate comprises a straight plate connected with the upper torsion plate and a bent plate located at the upper part of the straight plate, and a top pressing plate is arranged at the top of the bent plate.
6. The purging and trapping double-needle sample introduction device according to claim 5, wherein an inner concave arc is arranged at the end of the top pressure plate, and the inner concave arc is located so that the sampling needle does not contact with the top pressure plate.
7. The purging and trapping double-needle sample introduction device according to claim 1, wherein a module guide rail for movement of the module slider is provided in parallel to the slide.
8. The purging and trapping double-needle sample introduction device according to claim 7, wherein the control device comprises a computer and a sensing device, the sensing device comprises a photoelectric switch contact piece mounted on the module sliding block, an upper limit photoelectric switch and a lower limit photoelectric switch respectively mounted at preset positions of the module guide rail; the computer is in control connection with the stepping motor and the sampling needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220256614.6U CN216870160U (en) | 2022-02-08 | 2022-02-08 | Purging and trapping double-needle sample introduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220256614.6U CN216870160U (en) | 2022-02-08 | 2022-02-08 | Purging and trapping double-needle sample introduction device |
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| Publication Number | Publication Date |
|---|---|
| CN216870160U true CN216870160U (en) | 2022-07-01 |
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|---|---|---|---|
| CN202220256614.6U Active CN216870160U (en) | 2022-02-08 | 2022-02-08 | Purging and trapping double-needle sample introduction device |
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| CN (1) | CN216870160U (en) |
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- 2022-02-08 CN CN202220256614.6U patent/CN216870160U/en active Active
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Effective date of registration: 20220714 Address after: 065201 5th floor, No. 9-902 standard plant, Tianshan Zhigu, north side of South Chemical Road, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province Patentee after: Hebei Panyi Analytical Instrument Co.,Ltd. Address before: No. 19, West District, xiachanfang village, Liangxiang Township, Fangshan District, Beijing 102446 Patentee before: BEIJING ZHONGYI YUSHENG TECHNOLOGY Co.,Ltd. |