Sampling device and detection system

Abstract

The present invention provides an injection device and a detection system, wherein the injection device includes a shell and an injection component. The injection component has an injection channel, and the injection channel is an expanding channel or a narrowing channel in the direction from the injection port to the sample outlet port. The detection system includes an injection device. In the injection device of this structure, the injection channel is an expanding channel or a narrowing channel, rather than a flat and long parallel channel. The probability of the test paper knocking over the inner wall surface of the injection channel during the process of extending from the injection channel into the injector is greatly reduced, the probability of the sample to be tested being adsorbed on the inner wall surface of the injection channel is reduced, the sample is not easily lost, and the injection channel can be effectively prevented from being contaminated. After long-term use of the injection device, the injection channel has high cleanliness, little contamination to the next injection test, and high accuracy of the test result; at the same time, the setting of the injection channel maintains a certain distance between the inlet end of the injector and the shell, preventing the inlet of the injector from being too close to the shell, resulting in excessive temperature of the shell and scalding the operator.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a sample injection device and a detection system. Background Art

[0002] In various spectral analysis and detection fields such as mass spectrometry, migration spectrometry, and spectroscopy, samples are sampled on the surface of the test paper by wiping it with a test paper or other means, and then the test paper is inserted into the inlet of the injector through the injection port of the injection device. The sample is separated from the test paper in the injector and transported into the thermal desorber. The sample particles are decomposed into small molecules through thermal desorption and transported into the detector. Then, they are detected by various spectral analysis detection devices, thereby achieving the purpose of distinguishing the substances contained in the sample.

[0003] Given that the temperature of the thermal desorber is high, the temperature of the adjacent injector is also high. To prevent the temperature of the housing where the injection port of the injection device is located from being too high, a certain distance needs to be maintained between the injector inlet and the housing of the injection device to prevent the housing from being too close to the injector and causing the housing to be too high and burn the operator. Figures 1 to 3 As shown, the injection port of the injection device in the prior art is a parallel port that passes through the shell of the injection device, and an extension piece 2 is provided between the inner end of the injector inlet and the injector inlet, so that the test paper can extend from the injection port along the extension piece 2 into the injector to ensure accurate injection.

[0004] However, in the above-mentioned sampling device, the extension piece is a flat and long structure with parallel channels inside. During the process of extending the test paper from the parallel channels of the extension piece into the sample injector, it is easy to touch the inner wall surface of the extension piece, and the sample to be tested on the test paper will be adsorbed on the inner wall surface of the extension piece, causing sample loss; if the previous sample is adsorbed on the inner wall surface of the extension piece, it will contaminate the sample on the test paper during the next sampling process. The contaminant will be carried into the sample injector and cause contamination to the next sampling test, affecting the accuracy of subsequent test results; the longer the time, the more serious the contamination of the inner wall surface of the extension piece, and the more inaccurate the test results. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art sampling device in that during use, the sample to be tested is easily adsorbed on the inner wall of the extension part, causing sample loss, and contaminating subsequent samples and affecting the test results.

[0006] To this end, the present invention provides a sample injection device, comprising

[0007] case;

[0008] The sampling component has a sampling channel, the two ends of which are a sampling port and a sampling outlet port respectively. The sampling channel is arranged through the shell, and the sampling channel is an expanding channel or a shrinking channel in the direction from the sampling port to the sampling outlet port.

[0009] Optionally, in the above-mentioned sample injection device, the diameter of the narrowed channel gradually decreases from the sample injection port toward the sample outlet port; or

[0010] The caliber of the expanded channel gradually increases from the injection port toward the output port.

[0011] Optionally, in the above-mentioned sample injection device, the longitudinal cross-section of the expanding channel or the shrinking channel is a flat structure.

[0012] Optionally, in the above-mentioned sampling device, when the sampling channel is a constricted channel, the sampling outlet is waist-shaped, and / or the sampling port is quadrilateral; or

[0013] When the injection channel is a flared channel, the injection port is waist-shaped, and / or the outlet port is quadrilateral; or

[0014] Optionally, in the above-mentioned injection device, an end face of the injection port is formed on the shell and is flush with the outer wall surface of the shell.

[0015] Optionally, the above-mentioned sample injection device further comprises a docking portion having a docking channel therein, and the inlet of the docking portion is arranged on the sample outlet port;

[0016] and an injector arranged in parallel with the docking portion; the outlet of the docking portion extends inwardly to be directly connected with the sample inlet of the injector; the longitudinal section shape of the docking portion matches the shape of the sample inlet of the injector.

[0017] Optionally, in the above-mentioned sample injection device, a detection device for detecting whether a test paper is inserted into the sample inlet of the sample injector is provided on the docking portion.

[0018] Optionally, in the above-mentioned sample injection device, the detection device is a photoelectric radiation tube;

[0019] The opposite walls of the docking portion are respectively provided with notches or mounting holes, the two notches or mounting holes are facing each other, and the light emitting diode and the light receiving diode in the photoelectric emitting tube are respectively installed in the notches or mounting holes.

[0020] Optionally, in the above-mentioned sample injection device, the outlet end surface of the docking portion and the sample inlet of the sample injector are arranged at a preset distance.

[0021] The present invention provides a detection system, comprising any one of the above-mentioned sample injection devices.

[0022] The technical solution of the present invention has the following advantages:

[0023] 1. The sampling device provided by the present invention comprises a housing and a sampling component. The sampling component comprises an injection channel, with an injection port and an outlet port at either end of the injection channel. The injection channel extends through the housing and expands or contracts from the injection port toward the outlet port.

[0024] The injection device of this structure has an injection channel that is an expanded channel or a contracted channel rather than a flat and long parallel channel. The probability of the test paper after sampling hitting the inner wall of the injection channel during the process of extending from the injection channel into the injector is greatly reduced, the probability of the sample to be tested being adsorbed on the inner wall of the injection channel is reduced, the sample is not easily lost, and the injection channel can be effectively prevented from being contaminated. After long-term use of the injection device, the injection channel has high cleanliness, little contamination for the next injection test, and high accuracy of the test results. At the same time, the setting of the injection channel maintains a certain distance between the inlet end of the injector and the shell, preventing the injector inlet from being too close to the shell, resulting in excessively high shell temperature and scalding the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific 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 work.

[0026] Figure 1 It is a schematic diagram of a sample injection device in the prior art;

[0027] Figure 2 It is a schematic diagram of the interior of the sampling device in the prior art;

[0028] Figure 3 It is a cross-sectional view of a sample injection device in the prior art;

[0029] Figure 4 Schematic diagram of the sample injection device provided in Example 1 of the present invention;

[0030] Figure 5 Schematic diagram of the interior of the sample injection device provided in Example 1 of the present invention;

[0031] Figure 6 A cross-sectional view of the sample injection device provided in Example 1 of the present invention;

[0032] Description of reference numerals:

[0033] 1-shell; 2-extension piece; 3-docking part; 4-injector; 5-injection component; 51-injection port; 52-outlet port. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Example 1

[0039] This embodiment provides a sample injection device, such as Figures 4 to 6 As shown, it includes a housing 1 and a sample injection component 5.

[0040] Among them, the sampling component 5 has an sampling channel, and the two ends of the sampling channel are respectively an injection port 51 and an outlet port 52. The sampling channel is set through the shell 1, and the sampling channel is an expanding channel or a shrinking channel from the injection port 51 to the outlet port 52.

[0041] The sampling channel of the sampling device of this structure is an expanded channel or a contracted channel rather than a flat and long parallel channel. The probability of the test paper after sampling hitting the inner wall of the sampling channel during the process of extending from the sampling channel into the sampler 4 is greatly reduced, and the probability of the sample to be tested being adsorbed on the inner wall of the sampling channel is reduced. The sample is not easily lost, and the sampling channel can be effectively prevented from being contaminated. After long-term use of the sampling device, the sampling channel has high cleanliness, little contamination for the next sampling test, and high accuracy of the test results. At the same time, the setting of the sampling channel maintains a certain distance between the inlet end of the sampler 4 and the shell 1, preventing the inlet of the sampler 4 from being too close to the shell 1, resulting in excessive temperature of the shell 1 and scalding the operator.

[0042] Optionally, the diameter of the narrowing channel gradually decreases from the injection port 51 toward the sample outlet port 52 ; or, when the injection channel is an expanding channel, the diameter of the expanding channel gradually increases from the injection port 51 toward the sample outlet port 52 .

[0043] Specifically, the end face of the injection port 51 is formed on the housing 1 and is flush with the outer wall of the housing 1. The longitudinal section of the expanded channel or the contracted channel is a flat structure, for example, Figure 4 As shown, when the injection channel is a constricted channel, the sample outlet port 52 is waist-shaped, the injection port 51 is a quadrilateral, or the injection port 51 is a quadrilateral with rounded corners. The length of the quadrilateral is greater than the width. The longitudinal section of the injection channel gradually decreases from the injection port 51 to the sample outlet port 52 until the sample outlet port 52 is waist-shaped so as to dock with the inlet of the injector 4.

[0044] like Figure 5 As shown, the sample injection device further includes a docking portion 3 and a sample injector 4, wherein the docking portion 3 has a docking channel therein, and the inlet end of the docking portion 3 is disposed on the sample outlet port 52. For example, the docking portion 3 and the sample outlet port 52 are integrally formed. The sample injector 4 is disposed inside the housing 1 and is arranged parallel to the docking portion 3. The outlet end of the docking portion 3 extends toward the interior of the housing 1 to be directly connected to the sample inlet of the sample injector 4. The longitudinal cross-sectional shape of the docking portion 3 is the same as that of the sample inlet of the sample injector 4. The test paper extends into the sample inlet of the sample injector 4 through the sample injection channel. The docking portion 3 can serve as a guide to ensure accurate sample injection.

[0045] Optionally, notches or mounting holes are provided on two opposite walls of the docking portion 3. For example, two notches are arranged on two opposite walls of the docking portion 3. The detection device is a photoelectric tube. The light-emitting diode and the light-receiving diode of the photoelectric tube are respectively installed on the two notches to detect whether the test paper is inserted into the sample inlet of the injector 4. When the test paper is detected to be inserted, the injector 4 starts to work. Optimally, the outlet end face of the docking portion 3 and the sample inlet of the injector 4 are arranged at a certain distance. Since the temperature of the injector 4 is high, the sample inlet of the injector 4 can be prevented from directly contacting the outlet end face of the docking portion 3, which may cause the temperature of the docking portion 3 to be too high. This further prevents the temperature of the outer wall of the shell 1 from being too high and scalding the operator.

[0046] As a first alternative implementation of Example 1, the outlet end face of the docking portion 3 and the sample inlet of the sample injector 4 may be arranged without any distance between them, as long as the depth of the sample injection channel can maintain a certain distance between the inlet end of the sample injector 4 and the shell 1, and the temperature of the shell 1 is not too high and will not burn the operator.

[0047] As a second alternative implementation of Example 1, the detection device may also be a position sensor; as a further variation, the detection device may not be provided, and after the test paper is inserted into the injector 4, the injector 4 may be manually turned on to operate.

[0048] As a third alternative implementation of Example 1, when the sample channel is an expanded channel, the sample inlet port 51 is waist-shaped, and / or the sample outlet port 52 is quadrilateral.

[0049] As a fourth alternative embodiment of Example 1, the narrowing channel can also be stepped from the injection port 51 toward the sample outlet port 52, so that the test paper maintains a sufficient distance from the injection channel when extending into the injector 4 so that the test paper does not easily contact the inner wall of the injection channel. If the injection channel is an expanding channel, the diameter of the expanding channel can also be stepped from the injection port 51 toward the sample outlet port 52.

[0050] Example 2

[0051] This embodiment provides a detection system, comprising the sample injection device, thermal desorber, and detector of Example 1. During use, a test strip containing a sample to be tested is inserted through injection port 51 into the sample inlet of injector 4. The sample to be tested is located at the front end of the test strip. After the photoelectric detector detects the insertion of the test strip, injector 4 begins operation. The sample separates from the test strip in injector 4 and enters the thermal desorber for decomposition before being transported to the detector for detection.

[0052] In the detection system of this structure, the sampling channel of the sampling device is an expanded channel or a contracted channel, rather than a flat and long parallel channel. The probability of the test paper after sampling hitting the inner wall of the sampling channel during the process of extending from the sampling channel into the injector 4 is greatly reduced, the probability of the sample to be tested being adsorbed on the inner wall of the sampling channel is reduced, the sample is not easily lost, and the sampling channel can be effectively prevented from being contaminated. After long-term use of the sampling device, the sampling channel has high cleanliness, little contamination to the next sampling test, and high accuracy of the test results.

[0053] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A sampling device, characterized in that: include Housing (1); The sampling component (5) has a sampling channel, the two ends of which are a sampling port (51) and a sampling outlet port (52), respectively. The sampling channel is provided through the housing (1), and the sampling channel is an expanding channel or a shrinking channel in a direction from the sampling port (51) toward the sampling outlet port (52); It also includes a docking portion (3) having a docking channel therein, and an inlet of the docking portion (3) is arranged on the sample outlet port (52); and a sample injector (4) arranged parallel to the docking portion (3); the outlet of the docking portion (3) extends inwardly to be directly connected to the sample inlet of the sample injector (4); the longitudinal cross-sectional shape of the docking portion (3) matches the shape of the sample inlet of the sample injector (4), and the test paper is suitable for extending into the sample inlet of the sample injector (4) through the sample injection channel.

2. The sample injection device according to claim 1, characterized in that The diameter of the narrowed channel gradually decreases from the injection port (51) toward the outlet port (52); or The caliber of the expanded channel gradually increases from the sample inlet port (51) toward the sample outlet port (52).

3. The sample injection device according to claim 1 or 2, characterized in that: The longitudinal section of the expanding channel or the shrinking channel is a flat structure.

4. The sample injection device according to claim 3, characterized in that When the injection channel is a constricted channel, the sample outlet port (52) is waist-shaped, and / or the injection port (51) is quadrilateral; or When the injection channel is a flared channel, the injection port (51) is waist-shaped, and / or the outlet port (52) is quadrilateral.

5. The sample injection device according to claim 1 or 2, characterized in that: The end surface of the injection port (51) is formed on the shell (1) and is flush with the outer wall surface of the shell (1).

6. The sample injection device according to claim 1 or 2, characterized in that: The docking portion (3) is provided with a detection device for detecting whether the test paper is inserted into the sample inlet of the sample injector (4).

7. The sample injection device according to claim 6, characterized in that: The detection device is a photoelectric radiation tube; Opposite walls of the docking portion (3) are respectively provided with notches or mounting holes, the two notches or mounting holes are directly opposite, and the light emitting diode and the light receiving diode in the photoelectric emitting tube are respectively mounted in the notches or mounting holes.

8. The sample injection device according to claim 1 or 2, characterized in that: The outlet end surface of the docking portion (3) and the sample inlet of the sample injector (4) are arranged at a preset distance.

9. A detection system, characterized in that: The invention comprises the sampling device according to any one of claims 1 to 8.

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