Closed buffer sampling device of gas chromatograph

Abstract

The utility model provides a gas chromatograph closed buffer sample introduction device, which mainly comprises a sample introduction pipeline used for being communicated with a sample storage container; the sample discharging pipeline is communicated with the sample feeding pipeline in an openable and closable manner and is used for conveying the sample medium of the sample feeding pipeline into the gas chromatograph; the buffer pipeline is communicated with the sample introduction pipeline in an openable and closable manner, so that the internal pressure of the sample storage container can be adjusted in a manner of discharging the sample medium; wherein the buffer pipeline is provided with a flow detection component and a separation container, the flow detection component is used for controlling opening and closing between the sample discharging pipeline and the sample feeding pipeline as well as between the buffer pipeline and the sample feeding pipeline, and the separation container can peel off part of substances in a sample medium; the sample medium in the sample storage container can be depressurized through the buffer pipeline, and the separation container is arranged on the buffer pipeline to separate harmful substances in the sample medium, so that the technical problem that the discharged sample medium cannot be properly treated when the internal pressure of the sample storage container is released in a mode of discharging the sample medium is solved.

Description

Technical Field

[0001] The present application relates to the technical field of petrochemical sample detection, and in particular to a closed buffered sample injection device for a gas chromatograph. Background Art

[0002] In the industrial production and scientific research activities in the petrochemical field, gas chromatographs, as a precise and efficient analytical instrument, are widely used in the determination of components of various gas sample media. However, in actual operation, due to the requirements of internal pressure control, the sample storage container used to store the gas sample to be tested must undergo a strict pressure relief step before being connected to the gas chromatograph to ensure that the pressure in the container is moderate, avoid impact on the instrument and equipment, and also ensure the accuracy and stability of the measurement data.

[0003] There are many pipeline pressure relief mechanisms suitable for sample storage containers on the market, which can effectively achieve rapid release and regulation of internal pressure in containers. Through carefully designed mechanical structures and automated control systems, this type of pressure relief mechanism successfully meets the petrochemical industry's needs for safe and rapid pressure relief of sample containers, thereby promoting the smooth progress of gas chromatography analysis processes.

[0004] However, although the existing pipeline pressure relief technology has made significant progress in functionality, it still has obvious shortcomings in terms of environmental protection and occupational health. Specifically, the current pressure relief mechanism fails to effectively collect and harmlessly treat the discharged sample medium. Given that many petrochemical sample media have toxic components, direct discharge will not only pose a potential threat to the health of on-site workers, but will also cause harmful substances to spread into the environment, causing environmental pollution and ecological damage. Therefore, the development of a new generation of pipeline pressure relief devices that can ensure efficient pressure relief and properly dispose of toxic sample media has become one of the key technical issues that must be solved in the current petrochemical field. Utility Model Content

[0005] The purpose of the embodiment of the present application is to provide a closed buffered sampling device for a gas chromatograph, which can reduce the pressure of the sample medium in the sample storage container through a buffer pipeline, and configure a separation container on the buffer pipeline to separate harmful substances in the sample medium, so as to release the internal pressure of the sample storage container when discharging the sample medium, thereby solving the technical problem that the discharged sample medium cannot be properly handled.

[0006] In order to solve the above technical problems, the following technical solutions are provided in the embodiments of the present application:

[0007] The present application provides a closed buffered sample injection device for a gas chromatograph, which mainly comprises a sample injection pipeline, which is used to communicate with a sample storage container; a sample discharge pipeline, which is openably and closably connected to the sample injection pipeline and is used to transport the sample medium in the sample injection pipeline to the gas chromatograph; a buffer pipeline, which is openably and closably connected to the sample injection pipeline and is capable of adjusting the internal pressure of the sample storage container by discharging the sample medium;

[0008] The buffer pipeline is provided with a flow detection component and a separation container. The flow detection component is used to control the opening and closing between the sample discharge pipeline and the buffer pipeline and the sample inlet pipeline. The separation container can strip off some substances in the sample medium.

[0009] In some modified implementations of the first aspect of the present application, the buffer pipeline is composed of a conveying section, a flow detection section and a sampling section connected in sequence; the sampling pipeline is connected to the conveying section in an openable and closable manner, the conveying section is connected to the separation container through the flow detection section, and the separation container can be connected to the external space through the sampling section.

[0010] In some modified implementations of the first aspect of the present application, it also includes: a first opening and closing component, which is respectively connected to the sample injection pipeline, the sample discharge pipeline and the conveying section, and is used to control the sample medium in the sample injection pipeline to flow into the sample discharge pipeline or the buffer pipeline; a flow detection component is arranged on the flow detection section, and the flow detection component is communicatively connected to the first opening and closing component.

[0011] In some modified embodiments of the first aspect of the present application, the first opening and closing component is configured as a three-way ball valve having an injection valve port and a first and a second sample outlet valve port that can be controlled to open and close; the injection valve port is connected to the injection pipeline, the first sample outlet valve port is connected to the sample discharge pipeline, and the second sample outlet valve port is connected to the conveying section.

[0012] In some modified implementations of the first aspect of the present application, it also includes: a buffer container, which is arranged on the buffer pipeline, the buffer container is connected between the conveying section and the flow detection section, and is used to buffer the medium pressure in the flow detection section.

[0013] In some modified embodiments of the first aspect of the present application, the interior of the separation container has a reaction solution for reacting with the sample medium to divide the interior of the separation container into a liquid region and a gas region; the sample discharge port of the flow detection section is connected to the liquid region of the separation container, and the sample discharge port of the sample discharge section is connected to the gas region of the separation container.

[0014] In some modified implementations of the first aspect of the present application, it also includes: a second opening and closing component, which is arranged on the sampling pipeline and is used to control the opening and closing of the sampling pipeline.

[0015] In some modified implementations of the first aspect of the present application, the second opening and closing component is configured as a pneumatic valve to switch the opening and closing state of the sampling pipeline through the valve of the pneumatic valve.

[0016] In some modified implementations of the first aspect of the present application, the following further includes:

[0017] The limiting component is arranged on the sample arrangement section and is used to limit the flow direction of the medium in the sample arrangement section.

[0018] In some modified embodiments of the first aspect of the present application, the limiting component is configured as a one-way valve; the injection port of the limiting component is connected to the separation container through the sample discharge section, and the sample discharge port of the limiting component is connected to the external space through the sample discharge section to limit the sample medium in the sample discharge section from flowing back into the separation container.

[0019] Compared with the prior art, the closed buffered sampling device for gas chromatograph provided in the present application can reduce the pressure of the sample medium in the sample storage container through the buffer pipeline, and configure a separation container on the buffer pipeline to separate the harmful substances in the sample medium. By effectively capturing and harmlessly treating the discharged toxic sample medium, the safety conditions in the workplace can be significantly improved, and the risk of workers being exposed to toxic gases can be greatly reduced, thereby protecting the life safety and health rights of employees. It can also prevent the toxic sample medium from being directly discharged into the atmosphere without treatment, reducing chemical pollution to the surrounding environment. The integrated processing method can simplify the operating procedures, making the gas chromatography analysis process smoother and more efficient, saving operating time and costs, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0021] Figure 1 The structural diagram of the closed buffer injection device of the gas chromatograph in the present application is schematically shown.

[0022] Description of Figure Numbers:

[0023] 1. Sample injection pipeline;

[0024] 2. Sample arrangement pipeline;

[0025] 3. Buffer pipeline; 31. Conveying section; 32. Flow detection section; 33. Sample arrangement section;

[0026] 4. Buffer container; 5. Flow detection component; 6. Separation container;

[0027] 7. First opening and closing component; 8. Second opening and closing component; 9. Limiting component. DETAILED DESCRIPTION

[0028] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments disclosed in the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0030] According to the above, a closed buffered sample injection device for a gas chromatograph is proposed in an embodiment of the present application, comprising: a sample injection pipeline 1, which is used to communicate with a sample storage container; a sample discharge pipeline 2, which is connected to the sample injection pipeline 1 in an openable and closable manner, and is used to transport the sample medium in the sample injection pipeline 1 to the gas chromatograph; a buffer pipeline 3, which is connected to the sample injection pipeline 1 in an openable and closable manner, so as to be able to adjust the internal pressure of the sample storage container by discharging the sample medium;

[0031] The buffer line 3 is provided with a flow detection component 5 and a separation container 6. The flow detection component 5 is used to control the opening and closing between the sample discharge line 2 and the buffer line 3 and the sample inlet line 1. The separation container 6 can strip off some substances in the sample medium.

[0032] Specifically, in the technical solution adopted by the present application, the sample injection line 1 is used as the main conveying line, and can be connected to the sample storage container storing the sample medium, so that the sample medium in the sample storage container is discharged. In order to detect the sample medium, the sample injection line 1 is connected to the gas chromatograph through the sample discharge line 2, so that the sample medium in the sample storage container can enter the gas chromatograph through the sample injection line 1 and the sample discharge line 2. Since the interior of the sample storage container generally has a strong pressure, the sample medium is instantly impacted into the gas chromatograph to shorten the service life of the gas chromatograph, and the technical key point of the present application is that a buffer line 3 connected to the sample injection line 1 is also provided, and the sample storage container can be depressurized before the sample medium enters the gas chromatograph through the sample discharge line 2. Specifically, before detecting the sample medium, the conveying channel between the sample injection line 1 and the sample discharge line 2 can be closed first, so that the sample medium discharged from the sample storage container into the sample injection line 1 is introduced into the buffer line 3, so that the pressure in the sample storage container can be effectively regulated. In this embodiment, a flow detection component 5 can also be configured on the buffer line 3 to obtain the sample medium flow in the buffer line 3, and determine whether the current pressure of the sample storage container is suitable for discharging the sample medium into the gas chromatograph through the flow. For example: the flow detection component 5 determines that the internal pressure threshold of the current sample storage container meets the standard for discharging into the gas chromatograph by detecting the flow in the buffer line 3, and then switches the conveying channel between the sample injection line 1 and the sample discharge line 2 from the closed state to the open state. At the same time, the conveying channel between the sample injection line 1 and the buffer line 3 is switched from the open state to the closed state, so that the sample medium discharged from the sample storage container into the gas chromatograph through the sample injection line 1 and the sample discharge line 2 meets the set pressure threshold. In order to properly handle the sample medium in the buffer line 3, a separation container 6 is also arranged on the buffer line 3 for receiving the sample medium in the buffer line 3. The separation container 6 can strip off harmful substances in the sample medium and store the stripped harmful substances inside the separation container 6, while discharging other harmless substances into the external space through the buffer line 3, thereby achieving proper treatment of the sample medium discharged by the pressure relief of the sample storage container to avoid the generation of negative factors such as affecting the health of the staff and damaging the environment.

[0033] For further information, see Attachment Figure 1 In some embodiments, the buffer pipeline 3 is composed of a conveying section 31, a flow detection section 32 and a sample discharge section 33 connected in sequence; the sampling pipeline 1 is connected to the conveying section 31 in an openable and closable manner, the conveying section 31 is connected to the separation container 6 through the flow detection section 32, and the separation container 6 can be connected to the external space through the sample discharge section 33.

[0034] Specifically, in the technical solution adopted by the present application, the buffer pipeline 3 can be composed of a conveying section 31, a flow detection section 32 and a sample discharge section 33. The conveying section 31 is located between the sample inlet pipeline 1 and the flow detection section 32, and is used to convey the sample medium to the flow detection section 32 for flow detection. The flow detection section 32 conveys the sample medium after detection to the separation container 6 for substance separation. After stripping, the sample medium in the separation container 6 is formed into two parts, namely, harmful substances and harmless substances. The harmful substances are stored in the separation container 6, while the harmless substances are discharged into the external space through the sample discharge section 33.

[0035] For further information, see Attachment Figure 1 In some embodiments, it also includes: a first opening and closing component 7, which is respectively connected to the sample injection pipeline 1, the sample discharge pipeline 2 and the conveying section 31, and is used to control the sample medium in the sample injection pipeline 1 to flow into the sample discharge pipeline 2 or the buffer pipeline 3; the flow detection component 5 is arranged on the flow detection section 32, and the flow detection component 5 is communicatively connected with the first opening and closing component 7.

[0036] Specifically, in the technical solution adopted by the present application, a first opening and closing component 7 is arranged between the sample feeding pipeline 1, the sample discharging pipeline 2 and the conveying section 31, and the sample feeding pipeline 1 is connected to the sample discharging pipeline 2 through the first opening and closing component 7, and the sample feeding pipeline 1 is also connected to the conveying section 31 through the first opening and closing component 7. In this embodiment, the first opening and closing component 7 has the function of controlling whether the sample discharging pipeline 2 or the conveying section 31 is connected to the sample feeding pipeline 1, which can be understood as an opening and closing function, so that the pressure threshold of the sample medium in the buffer pipeline 3 is detected by the flow detection component 5 to the opening and closing state between the sample discharging pipeline 2 and the conveying section 31 and the sample feeding pipeline 1. It should be noted that the flow detection component 5 in this embodiment can be connected to the first opening and closing component 7 through a controller, and the controller can be a programmable logic controller (PLC) or other controllers, which are limited here. It is sufficient to convert the detection result of the flow detection component 5 into a control signal and send it to the first opening and closing component 7, which is within the protection scope of the present application.

[0037] For further information, see Attachment Figure 1 In some embodiments, the first opening and closing component 7 is configured as a three-way ball valve having an injection valve port and a first sample outlet valve port and a second sample outlet valve port that can be controlled to open and close; the injection valve port is connected to the injection pipeline 1, the first sample outlet valve port is connected to the discharge pipeline 2, and the second sample outlet valve port is connected to the conveying section 31.

[0038] Specifically, in the technical solution adopted by the present application, the first opening and closing component 7 is connected to at least the sample inlet pipeline 1, the sample discharge pipeline 2 and the buffer pipeline 3, so the first opening and closing component 7 has at least a connection port. In this embodiment, a three-way ball valve can be selected, which has a sample inlet valve port and a first sample outlet valve port and a second sample outlet valve port that can control the opening and closing. When in use, the sample inlet valve port can be connected to the sample inlet pipeline 1, and the first sample outlet valve port can be connected to the sample discharge pipeline 2, and finally the second sample outlet valve port is connected to the buffer pipeline 3, specifically the conveying section 31 on the buffer pipeline 3. When in use, the first sample outlet valve port can be adjusted to a closed state, and the second sample outlet valve port can be adjusted to an open state, so that the sample medium in the sample storage container can be discharged into the buffer pipeline 3 through the sample injection pipeline 1 for pressure relief. When the flow detection component 5 detects that the pressure threshold in the sample storage container meets the requirements for discharge into the gas chromatograph, the first sample outlet valve port is switched from a closed state to an open state, and the second sample outlet valve port is switched from an open state to a closed state, so that the sample medium in the sample storage container can enter the gas chromatograph through the sample injection pipeline 1 and the sample discharge pipeline 2 for detection.

[0039] For further information, see Attachment Figure 1 In some embodiments, it also includes: a buffer container 4, which is arranged on the buffer pipeline 3, and the buffer container 4 is connected between the conveying section 31 and the flow detection section 32, and is used to buffer the medium pressure in the flow detection section 32.

[0040] Specifically, in the technical solution adopted by the present application, a buffer container 4 is also arranged on the buffer pipeline 3, which is used to buffer the sample medium transported from the conveying section 31 to the flow detection section 32. Specifically, the interior of the buffer container 4 has a storage space larger than the pipeline conveying space, so that the sample medium in the conveying section 31 can obtain a corresponding pressure reduction effect when entering the buffer container 4, effectively avoiding the impact of the sample medium transported from the conveying section 31 to the flow detection section 32 on the flow detection component 5 due to excessive pressure, and significantly improving the service life of the flow detection component 5. In addition, after the sample medium received by the flow detection section 32 is subjected to the pressure reduction treatment of the buffer container 4, it can also avoid the sample medium entering the separation container 6 from impacting the harmful substances in the separation container 6, effectively avoiding the harmful substances in the separation container 6 from being discharged to the external space through the sample discharge section 33, causing unnecessary trouble.

[0041] For further information, see Attachment Figure 1 In some embodiments, the interior of the separation container 6 has a reaction solution for reacting with the sample medium to divide the interior of the separation container 6 into a liquid area and a gas area; the sample discharge port of the flow detection section 32 is connected to the liquid area of ​​the separation container 6, and the sample discharge port of the sample discharge section 33 is connected to the gas area of ​​the separation container 6.

[0042] Specifically, in the technical solution adopted by the present application, a reaction solution capable of chemically reacting with the sample medium is provided inside the separation container 6. In the present embodiment, the separation container 6 is in a state where the reaction solution is not filled, so that the interior of the separation container 6 can be divided into a liquid area and a gas area, and the sample discharge port of the flow detection section 32 extends to the liquid area in the separation container 6, so that the sample medium discharged from the flow detection section 32 needs to pass through the reaction solution to enter the gas area, during which the sample medium can chemically react with the reaction solution, retaining the harmful substances in the sample medium in the reaction solution, and the harmless gas obtained by stripping is stored in the gas area of ​​the separation container 6, and the injection port of the sample discharge section 33 is connected to the gas area, so that the sample medium without harmful substances treated by the reaction solution is discharged to the external space through the sample discharge section 33, so that the sample medium discharged due to the pressure relief operation of the sample storage container can be properly handled safely and stably.

[0043] For further information, see Attachment Figure 1 In some embodiments, it further includes: a second opening and closing component 8, which is arranged on the sampling pipeline 1 and is used to control the opening and closing of the sampling pipeline 1.

[0044] For further information, see Attachment Figure 1 In some embodiments, the second opening and closing component 8 is configured as a pneumatic valve to switch the opening and closing state of the sampling pipeline 1 through the valve of the pneumatic valve.

[0045] Specifically, in the technical solution adopted by the present application, the second opening and closing component 8 is arranged on the sample injection pipeline 1, so that the opening and closing of the sample injection pipeline 1 can be independently controlled, which can be understood as the main switch valve of the sample injection buffer device in the present application. In this embodiment, if the first opening and closing component 7 or the conveying components or functional components on the sample discharge pipeline 2 and the buffer pipeline 3 are replaced, the second opening and closing component 8 can be selected to be closed so that the sample storage container and the sample injection buffer device are in a closed state, so that the first opening and closing component 7 and various components on the sample discharge pipeline 2 and the buffer pipeline 3 can be safely replaced.

[0046] For further information, see Attachment Figure 1 In some embodiments, it further includes: a limiting component 9, which is configured on the sample arrangement section 33 and is used to limit the flow direction of the medium in the sample arrangement section 33.

[0047] For further information, see Attachment Figure 1 , in some embodiments, the restriction component 9 is configured as a one-way valve;

[0048] The injection port of the limiting component 9 is connected to the separation container 6 through the sample discharge section 33 , and the sample discharge port of the limiting component 9 is connected to the external space through the sample discharge section 33 to limit the sample medium in the sample discharge section 33 from flowing back into the separation container 6 .

[0049] Specifically, in the technical solution adopted in the present application, a limiting component 9 can be configured on the sample row section 33 to fix the flow direction of the sample row section 33. In the present embodiment, the flow direction of the sample medium in the sample row section 33 can be set to be from the sample inlet port connected to the separation container 6 to the sample outlet port connected to the external space, thereby avoiding the backflow phenomenon in the sample row section 33, effectively increasing the discharge volume of the sample row section 33, and also avoiding the refluxed sample medium affecting the separation container 6 to peel off the sample medium transported by the flow detection section 32.

[0050] It should be noted that in the description of this specification, the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application; the terms "connect", "install", "fixed", etc. should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A closed buffered sample introduction device for a gas chromatograph, characterized in that: include: A sample inlet pipeline, which is used to communicate with the sample storage container; A sample discharge pipeline, which is in openable and closable communication with the sample inlet pipeline and is used to transport the sample medium in the sample inlet pipeline to the gas chromatograph; a buffer pipeline, which is in openable and closable communication with the sample inlet pipeline so as to adjust the internal pressure of the sample storage container by discharging the sample medium; The buffer pipeline is provided with a flow detection component and a separation container. The flow detection component is used to control the opening and closing of the sample discharge pipeline and the buffer pipeline and the sample inlet pipeline. The separation container can strip off some substances in the sample medium.

2. The closed buffer sample introduction device for gas chromatograph according to claim 1, characterized in that: The buffer pipeline is composed of a conveying section, a flow detection section and a sample arrangement section connected in sequence; The sample inlet pipeline is connected to the conveying section in an openable and closable manner, the conveying section is connected to the separation container through the flow detection section, and the separation container can be connected to the external space through the sample discharge section.

3. The closed buffer sample introduction device for gas chromatograph according to claim 2, characterized in that: Also includes: A first opening and closing component, which is respectively connected to the sample inlet pipeline, the sample discharge pipeline and the conveying section, and is used to control the sample medium in the sample inlet pipeline to flow into the sample discharge pipeline or the buffer pipeline; The flow detection component is arranged on the flow detection section, and the flow detection component is communicatively connected with the first opening and closing component.

4. The closed buffer sample introduction device for gas chromatograph according to claim 3, characterized in that: The first opening and closing component is configured as a three-way ball valve having an inlet valve port and a first and a second outlet valve port that can be controlled to open and close; The injection valve port is connected to the injection pipeline, the first sample outlet valve port is connected to the sample discharge pipeline, and the second sample outlet valve port is connected to the conveying section.

5. The closed buffer sample introduction device for gas chromatograph according to claim 2, characterized in that: Also includes: A buffer container is arranged on the buffer pipeline, and the buffer container is connected between the conveying section and the flow detection section, and is used to buffer the medium pressure in the flow detection section during conveying.

6. The closed buffer sample introduction device for gas chromatograph according to claim 3, characterized in that: The interior of the separation container has a reaction solution for reacting with the sample medium, so as to divide the interior of the separation container into a liquid region and a gas region; The sample discharge port of the flow detection section is connected to the liquid area of ​​the separation container, and the sample injection port of the sample discharge section is connected to the gas area of ​​the separation container.

7. The closed buffer sample introduction device for gas chromatograph according to claim 1, characterized in that: Also includes: The second opening and closing component is arranged on the sampling pipeline and is used to control the opening and closing of the sampling pipeline.

8. The closed buffer sample introduction device for gas chromatograph according to claim 7, characterized in that: The second opening and closing component is configured as a pneumatic valve to switch the opening and closing state of the sampling pipeline through the valve of the pneumatic valve.

9. The closed buffer sample introduction device for gas chromatograph according to claim 3, characterized in that: Also includes: A limiting component is arranged on the sample arrangement section and is used to limit the flow direction of the medium in the sample arrangement section.

10. The closed buffer sample introduction device for gas chromatograph according to claim 9, characterized in that: The limiting component is configured as a one-way valve; The injection port of the limiting component is communicated with the separation container through the sample discharging section, and the sample discharging port of the limiting component is communicated with the external space through the sample discharging section to limit the sample medium in the sample discharging section from flowing back into the separation container.

Images