Gas sampling tube automatic labeling module based on CTC automatic sample injector

Abstract

The utility model discloses an automatic labeling module for a gas sampling tube based on a CTC automatic sample injector. The automatic labeling module comprises a shell, a breathable partition plate positioned in the shell and a plurality of accommodating cavities positioned above the breathable partition plate, the shell cover is matched with the shell; sample introduction channels in one-to-one correspondence with the accommodating cavities are formed in the shell cover; the shell cover is provided with an air inlet communicated with each sample introduction channel, and the bottom of the shell is provided with an exhaust port. The utility model provides an automatic labeling module for a gas sampling tube based on a CTC automatic sampler, which solves the problems of long time consumption, large error and the like due to the fact that the calibration operation needs to be completed manually in the pretreatment process of the CTC automatic sampler in the prior art, and achieves the purposes of reducing manpower consumption, improving calibration efficiency and reducing calibration errors.

Description

Technical Field

[0001] The utility model relates to the field of disease control and detection, and particularly relates to an automatic standard addition module for gas sampling tubes based on a CTC automatic sampler. Background Art

[0002] Workplaces and public spaces are key areas of focus in the daily monitoring of disease control. By monitoring relevant hazard factors in workplaces and public spaces on a daily basis, protection can be provided to different populations. Volatile organic compounds (VOCs) refer to organic compounds with a relatively high saturated vapor pressure (greater than 13.33 Pa), low boiling point, small molecular weight, and easy volatility at normal temperature under standard conditions. Most VOCs have unpleasant special odors and have toxic, irritating, teratogenic, and carcinogenic effects. Therefore, timely monitoring of VOCs is beneficial to protecting the physical health of relevant populations.

[0003] The CTC automatic sampler is an integrated automatic sampler installed on a gas chromatograph (GC) or a gas chromatography-mass spectrometry (GC / MS) instrument, and can achieve various injection methods such as headspace injection, liquid injection, and SPEM injection.

[0004] In occupational health, for the detection of samples of volatile organic compounds in workplace air and indoor air in public spaces based on a CTC automatic sampler, a pretreatment method of thermal desorption and secondary thermal desorption is often used: according to the different polarities of compounds, activated carbon and silica gel sampling tubes are used, and after being collected by an atmospheric sampler, the volatile organic compounds in several liters of gas are adsorbed on the sampling tubes; before detection in the laboratory after sampling, it is necessary to calibrate the desorption efficiency and working curve for each batch of samples, that is, it is necessary to detect and analyze the desorption efficiency of the sampling tubes and make a working curve.

[0005] The calibration method in the prior art is: injecting standard solutions into two sets of sampling tubes respectively, one set for calibrating the desorption efficiency and the other set for calibrating the working curve; since the device can only process one sampling tube at a time, it takes 5 - 10 minutes to purge with carrier gas for a single treatment, one set of working curves requires 6 - 8 sampling tubes to be processed, and one desorption efficiency analysis requires 10 or more sampling tubes to be processed. In the prior art, the above process requires full manual operation, which is time-consuming, labor-intensive, and manual operation is prone to increasing systematic errors, resulting in low calibration accuracy. Summary of the Utility Model

[0006] The utility model provides an automatic standard addition module for gas sampling tubes based on a CTC automatic sampler to solve the problems in the prior art that the calibration operation needs to be completed manually during the pretreatment process of the CTC automatic sampler, such as long time consumption and large errors, and achieve the purpose of reducing labor consumption, improving calibration efficiency, and reducing calibration errors.

[0007] The utility model is realized through the following technical solutions:

[0008] An automatic standard addition module for a gas sampling tube based on a CTC automatic sampler, comprising a housing, a breathable partition located inside the housing, and a plurality of accommodation cavities located above the breathable partition; it further includes a housing cover matching the housing; sample injection channels corresponding to the accommodation cavities one by one are arranged on the housing cover; an air inlet communicating with each sample injection channel is arranged on the housing cover, and an exhaust port is arranged at the bottom of the housing.

[0009] In view of the problems in the prior art that during the pretreatment process of a CTC automatic sampler, the calibration operation needs to be completed manually, which is time-consuming and has large errors, the utility model provides an automatic standard addition module for a gas sampling tube based on a CTC automatic sampler. The module includes a housing, a breathable partition is arranged inside the housing, and a plurality of accommodation cavities are arranged above the breathable partition. The accommodation cavities are used to accommodate the sampling tubes to be calibrated. The housing cover of the present application has a sample injection channel and an air inlet, which are respectively used to inject a standard solution and a carrier gas into the structure.

[0010] When the present application is specifically used, first, the sampling tubes to be calibrated are loaded into the accommodation cavities, then the housing cover is covered, and a standard solution is injected into the corresponding sampling tubes through the sample injection channels; then a carrier gas is injected through the air inlet to purge the sampling tubes. The purging time can be adjusted according to the volatility of the solution and the injection volume. The purpose of calibrating the analysis efficiency and the calibration working curve can be achieved during this process.

[0011] It can be seen that the present application overcomes the defects of the prior art that during the calibration process, it takes a long time and consumes a large amount of manpower caused by manually holding the sampling tubes for a long time; multiple sampling tubes can be processed simultaneously during the calibration process, so the calibration efficiency is significantly improved; in addition, this solution can reduce the manual operation steps, thereby reducing the calibration error and improving the accuracy of the calibration result.

[0012] Further, a gas collection cavity is provided inside the housing, the breathable partition is located in the gas collection cavity, the bottom end of the accommodation cavity communicates with the top end of the gas collection cavity, and the top end of the exhaust port communicates with the bottom end of the gas collection cavity. The carrier gas after passing through each accommodation cavity enters the gas collection cavity and enters the exhaust port uniformly from the gas collection cavity.

[0013] Further, the breathable partition is slidably connected longitudinally in the gas collection cavity, and a first lifting mechanism for adjusting the height of the breathable partition is further included.

[0014] This solution is particularly applicable to CTC automatic samplers that cannot automatically switch sampling needles. Since such CTC automatic samplers cannot automatically switch sampling needles, manual placement and removal of the sampling tube are required for each operation. In this solution, the sampling tube can be directly placed in the accommodation cavity, and the bottom end of the sampling tube passes through the accommodation cavity and is placed on the breathable partition, and the breathable partition directly bears the sampling tube. In addition, the height of the breathable partition is adjustable, so that this solution can meet the use of sampling tubes of different heights, significantly improving the versatility of this solution and facilitating the adaptation of sampling tubes of different specifications.

[0015] In this solution, since the sampling tube is directly placed in the accommodation cavity, preferably, the inner diameter of the accommodation cavity is equal to the outer diameter of the sampling tube.

[0016] Preferably, the shell cover is hinged to the top of the shell.

[0017] Furthermore, the breathable partition is fixedly connected in the gas collection cavity, and the inner diameter of the accommodation cavity is greater than the outer diameter of the sampling tube.

[0018] In this solution, the inner diameter of the accommodation cavity is greater than the outer diameter of the sampling tube, so the sampling tube can be installed inside the rest of the structure and then put into the accommodation cavity as a whole. The above-mentioned rest of the structure can be set as a structure matching the robotic arm of the CTC automatic sampler according to needs, so that this solution can be applicable to CTC automatic samplers that can automatically switch sampling needles and realize a more automated calibration process.

[0019] Furthermore, it also includes a sleeve assembly matching the accommodation cavity; a first cavity for placing the sampling tube is provided inside the sleeve assembly, an air inlet channel communicating with the top of the first cavity is provided at the top of the sleeve assembly, and an exhaust channel communicating with the bottom of the first cavity is provided at the bottom of the sleeve assembly.

[0020] In this solution, the sleeve assembly is used as a structure matching the accommodation cavity and is used to be installed in the accommodation cavity; the sampling tube is placed in the first cavity inside the sleeve assembly, and the standard solution and the carrier gas both enter the sampling tube through the air inlet channel and are discharged through the exhaust channel.

[0021] Preferably, the sleeve assembly includes a tube body and a tube cap that match each other, and the first cavity is partially or entirely located inside the tube body; a second cavity is also provided inside the tube body, the second cavity is located below the first cavity, the bottom end of the first cavity communicates with the second cavity, and the exhaust channel is located inside the second cavity.

[0022] In this solution, the bottom end of the first cavity communicates with the second cavity, so that the sampling tube can be inserted into the second cavity.

[0023] Preferably, it further includes a carrier plate slidably connected longitudinally in the second cavity, the carrier plate is movably sleeved outside the exhaust passage; and a second lifting mechanism for adjusting the height of the carrier plate.

[0024] In this solution, the bottom end of the sampling tube enters the second cavity and is placed on the carrier plate, and the carrier plate bears the sampling tube. In addition, the height of the carrier plate is adjustable, so that this solution can meet the use of sampling tubes of different heights, significantly improving the versatility of this solution and facilitating the adaptation to sampling tubes of different specifications.

[0025] It should be noted that the first lifting mechanism and the second lifting mechanism in this application can both be implemented by any height adjustment technology that can be achieved by those skilled in the art, and no specific limitation is made here.

[0026] Preferably, the shell cover is slidably fitted on the top of the shell, which is convenient for matching with the robotic arm of the CTC automatic sampler, and further makes this solution more applicable to the CTC automatic sampler that can automatically switch the sampling needle, realizing a more automated calibration process.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] 1. Based on the automatic labeling module of the gas sampling tube of the CTC automatic sampler, the present invention overcomes the defects of long time consumption and large manpower consumption caused by manual long-term holding of the sampling tube during the calibration process in the prior art; multiple sampling tubes can be processed simultaneously during the calibration process, so the calibration efficiency is significantly improved; in addition, this solution can reduce the manual operation steps, thereby reducing the calibration error and improving the accuracy of the calibration structure.

[0029] 2. Based on the automatic labeling module of the gas sampling tube of the CTC automatic sampler, the present invention can be adapted to the CTC automatic sampler that cannot automatically switch the sampling needle and the CTC automatic sampler that can automatically switch the sampling needle in the prior art by selecting different solutions, has strong versatility, and does not require changing the structure of the existing CTC automatic sampler.

[0030] 3. Based on the automatic labeling module of the gas sampling tube of the CTC automatic sampler, the present invention can be adjusted according to the length of the sampling tube, so as to adapt to the use of sampling tubes of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0032] Figure 1 is a schematic structural diagram of Embodiment 1 in the specific embodiment of the present invention;

[0033] Figure 2 This is a cross-sectional view of Embodiment 1 in the specific embodiments of the present utility model;

[0034] Figure 3 This is a schematic structural view of Embodiment 2 in the specific embodiments of the present utility model;

[0035] Figure 4 This is a cross-sectional view of Embodiment 2 in the specific embodiments of the present utility model;

[0036] Figure 5 This is a perspective view of the sleeve assembly in the specific embodiments of the present utility model;

[0037] Figure 6 This is a cross-sectional view of the sleeve assembly in the specific embodiments of the present utility model.

[0038] Reference numerals in the drawings and corresponding component names:

[0039] 1 - housing, 2 - breathable partition, 3 - accommodation cavity, 4 - housing cover, 5 - sample injection channel, 6 - air inlet, 7 - exhaust port, 8 - gas collection cavity, 9 - first lifting mechanism, 10 - first cavity, 11 - air inlet channel, 12 - exhaust channel, 13 - tube body, 14 - tube cap, 15 - second cavity, 16 - carrier plate, 17 - second lifting mechanism. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and do not limit the present utility model. In the description of the present application, it should be understood that orientation or positional relationships indicated by terms such as "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present application.

[0041] Embodiment 1:

[0042] As Figure 1 And Figure 2The automatic standard addition module for the gas sampling tube of the CTC automatic sampler shown in the figure includes a housing 1, a breathable partition 2 located inside the housing 1, and a plurality of accommodating cavities 3 located above the breathable partition 2; it also includes a housing cover 4 that matches the housing 1, and sampling channels 5 corresponding to the accommodating cavities 3 one by one are arranged on the housing cover 4; an air inlet 6 communicating with each sampling channel 5 is arranged on the housing cover 4, and an exhaust port 7 is arranged at the bottom of the housing 1.

[0043] There is a gas collection cavity 8 inside the housing 1, the breathable partition 2 is located inside the gas collection cavity 8, the bottom end of the accommodating cavity 3 communicates with the top end of the gas collection cavity 8, and the top end of the exhaust port 7 communicates with the bottom end of the gas collection cavity 8.

[0044] In this embodiment, the inner diameter of the accommodating cavity 3 is equal to the outer diameter of the sampling tube; the breathable partition 2 is slidably connected longitudinally inside the gas collection cavity 8, and a first lifting mechanism 9 for adjusting the height of the breathable partition 2 is further included; the housing cover 4 is hinged to the top of the housing 1; the breathable partition 2 uses a metal mesh. In addition, the sampling channel 5 penetrates the housing cover 4 vertically; the air inlet 6 is horizontally opened on the side wall of the housing cover 4.

[0045] In a more preferred embodiment, a guide rail for the sliding of the breathable partition 2 is provided on the inner wall of the gas collection cavity 8.

[0046] In one or more embodiments, the first lifting mechanism 9 can be implemented by common lifting devices such as hydraulic cylinders, air cylinders, electric push rods, scissor lifts, etc.

[0047] In one or more preferred embodiments, the first lifting mechanism 9 includes a screw rod fixedly connected to the breathable partition 2, the screw rod passes through the side wall of the housing 1 and is connected with a set screw nut, and a longitudinally extending straight groove is opened on the side wall of the housing 1, and the screw rod is in dynamic sealing cooperation with the straight groove.

[0048] In one or more preferred embodiments, the first lifting mechanism 9 includes a gear rotatably connected to the breathable partition 2, a rack meshing with the gear, the rack is arranged on the inner wall of the housing 1 and extends longitudinally, and a motor with a self-locking function for driving the rotation of the gear is further included.

[0049] This embodiment is applicable to a CTC automatic sampler that cannot automatically switch the sampling needle, and the staff manually takes and places the sampling tube into the accommodating cavity 3.

[0050] In a more preferred embodiment, a one-way valve that conducts unidirectionally towards the housing 1 is provided in the sampling channel 5 / or the air inlet 6.

[0051] Embodiment 2:

[0052] Such as Figure 3 And Figure 4The automatic labeling module for the gas sampling tube of the CTC automatic sampler shown in the figure includes a housing 1, a breathable partition 2 located inside the housing 1, and a plurality of accommodating cavities 3 located above the breathable partition 2; it also includes a housing cover 4 that matches the housing 1, and a sampling channel 5 corresponding to each accommodating cavity 3 is provided on the housing cover 4; an air inlet 6 communicating with each sampling channel 5 is provided on the housing cover 4, and an exhaust port 7 is provided at the bottom of the housing 1.

[0053] A gas collecting cavity 8 is provided inside the housing 1, the breathable partition 2 is located inside the gas collecting cavity 8, the bottom end of the accommodating cavity 3 communicates with the top end of the gas collecting cavity 8, and the top end of the exhaust port 7 communicates with the bottom end of the gas collecting cavity 8.

[0054] The difference between this embodiment and Embodiment 1 is that the inner diameter of the accommodating cavity 3 is larger than the outer diameter of the sampling tube, and the breathable partition 2 is fixedly connected inside the gas collecting cavity 8.

[0055] In this embodiment, the accommodating cavity 3 is not used to directly place the sampling tube. Instead, after the sampling tube is placed into the sleeve assembly, the entire sleeve assembly is then placed into the accommodating cavity; therefore, in this embodiment, the outer diameter of the sleeve assembly is equal to the inner diameter of the accommodating cavity 3.

[0056] In this embodiment, the sleeve assembly is as Figure 5 shown in Figure 6 the figure, and includes a tube body 13 and a tube cap 14 that match each other. A first cavity 10 is partially located inside the tube body 13 and partially located inside the tube cap 14. The first cavity 10 is used to place the sampling tube. Therefore, the inner diameter of the first cavity 10 is equal to the outer diameter of the sampling tube.

[0057] An air inlet channel 11 communicating with the top of the first cavity 10 is provided at the top of the sleeve assembly, and an exhaust channel 12 communicating with the bottom of the first cavity 10 is provided at the bottom of the sleeve assembly. Specifically: a second cavity 15 is also provided inside the tube body 13. The second cavity 15 is located below the first cavity 10. The bottom end of the first cavity 10 communicates with the second cavity 15, and the exhaust channel 12 is located inside the second cavity 15.

[0058] A bearing plate 16 that is slidably connected longitudinally inside the second cavity 15 is further included in the sleeve assembly. The bearing plate 16 is movably sleeved outside the exhaust channel 12; a second lifting mechanism 17 for adjusting the height of the bearing plate 16 is also included.

[0059] The housing cover 4 is slidably fitted on the top of the housing 1.

[0060] In this embodiment, the tube body 13 and the tube cap 14 are threadedly connected; both the breathable partition 2 and the bearing plate 16 are made of metal mesh.

[0061] In one or more embodiments, the second lifting mechanism 17 can be implemented using common lifting devices such as hydraulic cylinders, pneumatic cylinders, electric push rods, scissor lifts, etc.

[0062] In one or more preferred embodiments, the second lifting mechanism 17 includes a screw rod fixedly connected to the bearing plate 16. The screw rod passes through the side wall of the tube body 13 and is connected to a set screw nut. A longitudinally extending straight groove is provided on the side wall of the tube body 13, and the screw rod is in dynamic sealing cooperation with the straight groove.

[0063] In one or more preferred embodiments, the second lifting mechanism 17 includes a gear rotatably connected to the bearing plate 16, a rack engaged with the gear, the rack is arranged on the inner wall of the tube body 13 and extends longitudinally, and further includes a motor with a self-locking function for driving the gear to rotate.

[0064] This embodiment is applicable to a CTC automatic sampler capable of automatically switching sampling needles. The structure of the sleeve assembly is set to match the robotic arm of the CTC automatic sampler, so that it can be grasped by the robotic arm. During specific use, the staff manually places the sampling tube into the sleeve assembly, sets the robotic arm of the CTC automatic sampler to automatically grasp the sleeve assembly and send it into the accommodation cavity 3, and closes the shell cover 4 by pushing it with the robotic arm; when the calibration operation is completed, the robotic arm can push the shell cover 4 open and take out the sleeve assembly.

[0065] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0066] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. In addition, the term "connected" used in this article, without special explanation, can be directly connected or indirectly connected via other components.

Claims

1. Automatic spiking module for gas sampling tubes based on a CTC autosampler, characterized in that It includes a housing (1), a breathable partition (2) located inside the housing (1), and a number of accommodating cavities (3) located above the breathable partition (2); it also includes a housing cover (4) that matches the housing (1), and a sampling channel (5) corresponding to each accommodating cavity (3) is provided on the housing cover (4); an air inlet (6) communicating with each sampling channel (5) is provided on the housing cover (4), and an exhaust port (7) is provided at the bottom of the housing (1).

2. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 1, characterized in that, A gas collecting cavity (8) is provided inside the housing (1), the breathable partition (2) is located inside the gas collecting cavity (8), the bottom end of the accommodating cavity (3) communicates with the top end of the gas collecting cavity (8), and the top end of the exhaust port (7) communicates with the bottom end of the gas collecting cavity (8).

3. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 2, characterized in that, The breathable partition (2) is slidably connected longitudinally inside the gas collecting cavity (8), and a first lifting mechanism (9) for adjusting the height of the breathable partition (2) is also included.

4. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 3, wherein The inner diameter of the accommodating cavity (3) is equal to the outer diameter of the sampling tube.

5. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 3, wherein, The housing cover (4) is hinged to the top of the housing (1).

6. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 2, characterized in that, The breathable partition (2) is fixedly connected inside the gas collecting cavity (8), and the inner diameter of the accommodating cavity (3) is greater than the outer diameter of the sampling tube.

7. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 6, characterized in that, It also includes a sleeve assembly that matches the accommodating cavity (3); a first cavity (10) for placing a sampling tube is provided inside the sleeve assembly, an air inlet channel (11) communicating with the top of the first cavity (10) is provided at the top of the sleeve assembly, and an exhaust channel (12) communicating with the bottom of the first cavity (10) is provided at the bottom of the sleeve assembly.

8. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 7, characterized in that, The sleeve assembly includes a tube body (13) and a tube cap (14) that match each other, and the first cavity (10) is partially or entirely located inside the tube body (13); a second cavity (15) is also provided inside the tube body (13), the second cavity (15) is located below the first cavity (10), the bottom end of the first cavity (10) communicates with the second cavity (15), and the exhaust channel (12) is located inside the second cavity (15).

9. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 8, characterized in that, It also includes a bearing plate (16) that is slidably connected longitudinally inside the second cavity (15), and the bearing plate (16) is movably sleeved outside the exhaust channel (12); a second lifting mechanism (17) for adjusting the height of the bearing plate (16) is also included.

10. The automatic spiking module for the gas sampling tube of the CTC automatic sampler according to claim 6, characterized in that, The housing cover (4) is slidably fitted to the top of the housing (1).

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