Sample sampling device for energy dispersion X-ray spectrometer and use method

Abstract

The invention discloses a sample sampling device for an energy dispersive X-ray spectrograph, which comprises a filter, a vacuum container, a sampling container and a conductive colloid, the inlet of the filter is communicated with a natural gas source, and the filter is used for filtering and accommodating particulate matters in the natural gas source; the vacuum container is communicated with a receiving pipe and a vacuumizing mechanism, the receiving pipe is communicated with the outlet end of the filter, and the receiving pipe is provided with a receiving valve; the sampling container is detachably arranged in the vacuum container, the sampling container is provided with a sampling port, the sampling port is provided with an air-tight door which can be opened or closed, and the air-tight door is connected with a remote switch; the conductive colloid is arranged in the sampling container and is used for adhering particulate matters in the natural gas source. The sampling device can solve the problem of biological change of particulate matters in natural gas caused by an existing sampling mode.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas quality detection, and in particular to a sample taking device for an energy dispersive X-ray spectrometer and a use method thereof. Background Art

[0002] The working principle of the energy dispersive X-ray spectrometer is to determine the type of element by analyzing the wavelength of the X-ray emitted by the sample, and to determine the content of the element in the sample by analyzing the intensity of the X-ray emitted by the sample for a specific element and comparing it with the element spectrum.

[0003] At present, before using an energy dispersive X-ray spectrometer for measurement, it is generally necessary to stick the sample to be tested on a conductive adhesive for sample preparation, and then place the prepared sample into the vacuum chamber of the energy dispersive X-ray spectrometer and evacuate it for detection.

[0004] The particulate matter in natural gas is generally iron sulfide powder, which will undergo oxidation reaction in the air. Therefore, the physical properties of the particulate matter in natural gas will continue to change during the sample preparation process, resulting in biased measurement results. Summary of the invention

[0005] The object of the present invention is to provide a sample sampling device for an energy dispersive X-ray spectrometer to solve the problem that the existing sampling method causes the physical property changes of particulate matter in natural gas.

[0006] The present invention is achieved through the following technical solutions:

[0007] A sample sampling device for an energy dispersive X-ray spectrometer comprises: a filter, the inlet of the filter is connected to a natural gas source, the filter is used to filter and contain particulate matter in the natural gas source; a vacuum container, the vacuum container is connected to a receiving tube and a vacuum pumping mechanism, the receiving tube is connected to an outlet end of the filter, and the receiving tube is provided with a receiving valve; a sampling container, the sampling container is detachably arranged in the vacuum container, the sampling container is provided with a sampling port, and the sampling port is provided with a sealed door that can be opened or closed, and the sealed door is connected to a remote switch; a conductive colloid, the conductive colloid is arranged in the sampling container, and the conductive colloid is used to adhere to particulate matter in the natural gas source.

[0008] Optionally, the vacuum container is connected to a particle collector via a monitoring tube, and the monitoring tube is provided with a monitoring valve.

[0009] Optionally, the particle collector is connected to a vent pipe.

[0010] Optionally, the sampling port is arranged toward the rear end of the receiving tube.

[0011] Optionally, the vacuum container is provided with a container door, and the container door is flange-connected to the vacuum container; the receiving tube is provided at the container door.

[0012] Optionally, the inner cavity of the vacuum container is cylindrical, the container door is arranged on the end face of the inner cavity of the vacuum container and is arranged parallel to the cavity bottom of the inner cavity of the vacuum container; the sampling container is arranged in the middle of the cavity bottom of the inner cavity of the vacuum container, and the sampling port is arranged toward the container door; the receiving tube is vertically arranged in the middle of the container door.

[0013] Optionally, the sampling container is snap-connected to the cavity bottom of the vacuum container.

[0014] Optionally, the vacuum container and the sampling container are both made of copper.

[0015] Optionally, the sampling container is a rectangular container, and the conductive colloid is bonded to the bottom wall of the sampling container.

[0016] A method for using any of the above-mentioned sample sampling devices for energy dispersive X-ray spectrometers comprises the following steps:

[0017] Closing the airtight door through the remote switch, and then placing the sampling container in the vacuum container;

[0018] The receiving valve is closed, and then the vacuum container is evacuated using a vacuum pumping mechanism;

[0019] The airtight door is opened by the remote switch, and then the receiving valve is opened, so that the particles in the filter enter the vacuum container under the action of negative pressure and adhere to the conductive colloid;

[0020] Closing the receiving valve, closing the airtight door via the remote switch, and then disassembling the vacuum container and the filter;

[0021] Open the receiving valve to vent the vacuum container, and after venting, take the sampling container out of the vacuum container;

[0022] The sampling container is placed in the vacuum chamber of the energy dispersive X-ray spectrometer to evacuate the chamber, and then the sealed door is opened by the remote switch.

[0023] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0024] The present invention provides a sample sampling device for an energy dispersive X-ray spectrometer. The device obtains particulate matter from a natural gas source by setting a filter. The device also uses a vacuum container and a vacuum pumping mechanism to absorb particulate matter for detection in a closed connection with the filter by using a negative pressure suction method, thereby preventing the particulate matter from contacting with the air and causing oxidation. On this basis, the sampling container is provided with a sampling port and a sealed door, so that the sampling container can be switched between an open state and a self-sealed state. A remote switch is provided so that the sealed door can be opened and closed remotely. When in use, the sampling container is placed in a vacuum container, and after being sealed and vacuumed, the remote switch is used to open and close the sealed door. When the vacuum container is switched to the open state and absorbs particulate matter through negative pressure, the particulate matter will also enter the sampling container and adhere to the conductive colloid inside it. After the sampling is completed, the sampling container can be taken out of the vacuum container after switching to the closed state through the remote switch, and transferred to the vacuum chamber of the energy dispersive X-ray spectrometer in a sealed manner to avoid oxidation of the particulate matter in the process due to contact with the air, thereby ensuring the accuracy of subsequent detection. Through the mutual cooperation of the above-mentioned features, the sample sampling device for the energy dispersive X-ray spectrometer can effectively solve the problem of physical property changes of particulate matter in natural gas caused by the existing sampling method. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0026] Figure 1 A schematic diagram of a sample sampling device for an energy dispersive X-ray spectrometer provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a vacuum container of a sample sampling device for an energy dispersive X-ray spectrometer provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a sampling container of a sample sampling device for an energy dispersive X-ray spectrometer provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of a conductive colloid for a sample sampling device of an energy dispersive X-ray spectrometer provided in an embodiment of the present invention.

[0030] Marks and corresponding parts names in the attached drawings:

[0031] 10-filter; 20-vacuum container; 21-receiving tube; 211-receiving valve; 22-monitoring tube; 221-monitoring valve; 23-container door; 30-sampling container; 31-sampling port; 32-sealed door; 33-remote switch; 40-conductive colloid; 50-particle collector; 51-vent pipe. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0033] Please refer to Figures 1 to 4 The embodiment of the present invention provides a sample sampling device for an energy dispersive X-ray spectrometer, comprising: a filter 10, the inlet of the filter 10 is connected to a natural gas source, and the filter 10 is used to filter and contain particulate matter in the natural gas source; a vacuum container 20 is connected to a receiving tube 21 and a vacuum pumping mechanism, the receiving tube 21 is connected to the outlet end of the filter 10, and the receiving tube 21 is provided with a receiving valve 211; a sampling container 30 is detachably arranged in the vacuum container 20, the sampling container 30 is provided with a sampling port 31, and a sealed door 32 that can be opened or closed is provided at the sampling port 31, and the sealed door 32 is connected to a remote switch 33; a conductive colloid 40 is arranged in the sampling container 30, and the conductive colloid 40 is used to adhere to particulate matter in the natural gas source.

[0034] The sample sampling device for energy dispersive X-ray spectrometer provided in this embodiment obtains particulate matter from a natural gas source by setting a filter 10, and uses a negative pressure suction method to suck particulate matter for detection when the filter 10 is in a closed connection with the filter 10 by setting a vacuum container 20 and a vacuum pumping mechanism (not shown), so as to prevent the particulate matter from contacting with the air and being oxidized; on this basis, a sampling container 30 is set, and it is provided with a sampling port 31 and a sealed door 32, so that it can be switched between an open state and a self-sealed state, and a remote switch 33 is provided so that the sealed door 32 can be opened and closed remotely. When in use, it is placed in the vacuum container 20, and after being sealed and evacuated, it is passed through When the remote switch 33 is switched to the open state and the vacuum container 20 absorbs particulate matter through negative pressure, the particulate matter will also enter the sampling container 20 and adhere to the conductive colloid 40 therein. After the sampling is completed, the sampling container 30 can be taken out of the vacuum container 20 after being switched to the closed state through the remote switch 33, and transferred to the vacuum chamber of the energy dispersive X-ray spectrometer in a fully sealed manner to avoid oxidation of the particulate matter therein due to contact with the air during the process, thereby ensuring the accuracy of subsequent detection. Through the mutual cooperation of the above-mentioned features, the sample sampling device for the energy dispersive X-ray spectrometer can effectively solve the problem of physical property changes of particulate matter in natural gas caused by the existing sampling method.

[0035] It should be noted that the filter 10 may adopt any filtering mechanism in the prior art, such as mesh filtering, membrane filtering, etc., as long as it can filter out particulate matter from natural gas.

[0036] Preferably, a sealing strip is laid on the edge of the sealed door 32 to improve the sealing performance when closing.

[0037] It should be noted that the remote switch 33 may be any wireless control switch in the prior art, as long as it can open and close the sealed door 32 outside the vacuum container 20 .

[0038] It should be noted that the above-mentioned vacuuming mechanism can adopt any similar product in the prior art, such as a vacuum pump, as long as it can evacuate the sealed vacuum container 20.

[0039] In order to observe and characterize the amount of particles adsorbed by the conductive colloid 40 , the vacuum container 20 is connected to a particle collector 50 via a monitoring tube 22 , and the monitoring tube 22 is provided with a monitoring valve 221 .

[0040] By setting up a particle collector 50 and connecting it to the vacuum container 20 through the monitoring tube 22, the particles sucked into the vacuum container 20 will also be captured by the particle collector 50 at the same time. By observing the amount of captured particles by the particle collector 50, the amount of particles adsorbed by the conductive colloid 40 can be characterized.

[0041] It should be noted that the particle collector 50 can be placed inside the vacuum container 20 or outside the vacuum container 20, and be tightly connected to the vacuum container 20 through the monitoring tube 22. The former needs to be equipped with a remote monitoring module for the particle collector 50, such as a remote display screen, or a collection threshold is set for the particle collector 50, and an alarm is triggered when the threshold is reached; the latter can be directly observed with the naked eye.

[0042] In order to facilitate the venting of the vacuum container 20 and the particle collector 50 in a negative pressure state, the particle collector 50 is connected to a venting pipe 51 .

[0043] It should be noted that the vent pipe 51 is provided with a vent valve (not shown). The vent valve is closed during the sample preparation process and can be opened before taking out the sample.

[0044] In order to make the particles in the filter 10 fall into the sampling container 30 more efficiently, the sampling port 31 is arranged toward the rear end of the receiving tube 21 .

[0045] Through the above arrangement, the particles sucked in by the negative pressure are sucked in through the receiving tube 21 and directly rushed into the sampling container 30 from the outlet, and adhered to the surface of the conductive colloid 40, thereby preventing the inhaled particles from dispersing in the vacuum container 20, greatly improving the efficiency of sample preparation.

[0046] In order to allow the sampling container 30 to be placed in or taken out of the vacuum container 20 , the vacuum container 20 is provided with a container door 23 , and the container door 23 is flange-connected to the vacuum container 20 ; the receiving tube 21 is provided at the container door 23 .

[0047] Through the above arrangement, the flange structure can be used to ensure the sealing performance and high pressure resistance of the container door 23 , and can also be disassembled under normal pressure so that the sampling container 30 can be placed in or taken out of the vacuum container 20 .

[0048] In order to further explain the inner cavity structure of the vacuum container 20, the inner cavity of the vacuum container 20 is cylindrical, the container door 23 is arranged at the end face of the inner cavity of the vacuum container 20, and is arranged parallel to the cavity bottom of the inner cavity of the vacuum container 20; the sampling container 30 is arranged in the middle of the cavity bottom of the inner cavity of the vacuum container 20, and the sampling port 31 is arranged toward the container door 23; the receiving tube 21 is vertically arranged in the middle of the container door 23.

[0049] By setting the inner cavity of the vacuum container 20 to be cylindrical, the scattered particles can be rebounded to the middle of the vacuum container 20 with the help of the cylindrical cavity wall without hindering the inhalation of particles, so as to facilitate the collection of particles; by setting the container door 23 to be located at the end face of the inner cavity, the container door 23 is structurally supported by the annular contact surface (flange end face), which effectively improves the support performance, thereby indirectly improving the pressure bearing performance under negative pressure; by setting the sampling container 30 to be located at the cavity bottom of the vacuum container 20 so that it can directly face the container door 23, further The sampling port 31 is arranged to face the container door 23, so that the receiving tube 21 can be arranged on the container door 23, so that when taking out the sampling container 30, it is only necessary to remove the flange, and the receiving tube 21 is always connected to the filter 10; by arranging the receiving tube 21 vertically in the middle of the container door 23, on the one hand, the particle flow introduced by the vertically arranged receiving tube 21 can directly rush into the sampling container 30, and on the other hand, the particles introduced by the receiving tube 21 arranged in the middle and then dispersed can evenly hit the cavity wall of the vacuum container 20 and converge to the middle.

[0050] Preferably, in order to stably fix the sampling container 30, the sampling container 30 is snap-connected to the bottom of the vacuum container 20. In other embodiments, the sampling container 30 can also be detachably connected to the bottom of the vacuum container 20 by bonding, plugging, embedding, etc.

[0051] Preferably, the vacuum container 20 and the sampling container 30 are both made of copper.

[0052] In order to improve the stability of the sampling container 30 when it is placed, the sampling container 30 is a rectangular container, and the conductive colloid 40 is bonded to the bottom wall of the sampling container 30 .

[0053] An embodiment of the present invention further provides a method for using any one of the above-mentioned sample sampling devices for an energy dispersive X-ray spectrometer, comprising the following steps:

[0054] S1, closing the airtight door 32 through the remote switch 33, and then placing the sampling container 30 in the vacuum container 20;

[0055] S2, closing the receiving valve 211, and then using a vacuum pumping mechanism to evacuate the vacuum container 20;

[0056] S3, opening the sealed door 32 through the remote switch 33, and then opening the receiving valve 211, so that the particles in the filter 10 enter the vacuum container 20 under the action of negative pressure and adhere to the conductive colloid 40;

[0057] S4, closing the receiving valve 211, closing the airtight door 32 through the remote switch 33, and then disassembling the vacuum container 20 and the filter 10;

[0058] S5, opening the receiving valve 211 to empty the vacuum container 20, and after emptying, taking out the sampling container 30 from the vacuum container 20;

[0059] S6, placing the sampling container 30 into the vacuum chamber of the energy dispersive X-ray spectrometer to evacuate the chamber, and then opening the sealed door 32 through the remote switch 33.

[0060] It should be noted that when a particle collector 50, a monitoring tube 22, a monitoring valve 221 and a vent tube 51 are provided, before preparing the sample, the monitoring valve 221 is opened and the vent tube 51 is blocked by the vent valve. The preparation personnel characterizes the progress of sample preparation through the particle collector 50. After the preparation is completed and the sampling container is sealed, the receiving valve 211 is closed and the vent valve is opened. The negative pressure is vented through the vent tube 51, and then the flange is removed to open the container door 23 and take out the sampling container 30.

[0061] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sample sampling device for an energy dispersive X-ray spectrometer, characterized in that: include: A filter (10), the inlet of the filter (10) being in communication with a natural gas source, the filter (10) being used to filter and contain particulate matter in the natural gas source; A vacuum container (20), wherein the vacuum container (20) is connected to a receiving tube (21) and a vacuum pumping mechanism, the receiving tube (21) is connected to the outlet end of the filter (10), and the receiving tube (21) is provided with a receiving valve (211); A sampling container (30), the sampling container (30) is detachably disposed in the vacuum container (20), the sampling container (30) is provided with a sampling port (31), and a sealed door (32) that can be opened or closed is provided at the sampling port (31), and the sealed door (32) is connected to a remote switch (33); A conductive colloid (40) is disposed in the sampling container (30), and the conductive colloid (40) is used to adhere to particulate matter in a natural gas source.

2. The sample sampling device for energy dispersive X-ray spectrometer according to claim 1, characterized in that: The vacuum container (20) is connected to a particle collector (50) via a monitoring pipe (22), and the monitoring pipe (22) is provided with a monitoring valve (221).

3. The sample sampling device for energy dispersive X-ray spectrometer according to claim 2, characterized in that: The particle collector (50) is connected to a vent pipe (51).

4. The sample sampling device for energy dispersive X-ray spectrometer according to claim 1, characterized in that: The sampling port (31) is arranged toward the rear end of the receiving tube (21).

5. The sample sampling device for energy dispersive X-ray spectrometer according to claim 4, characterized in that: The vacuum container (20) is provided with a container door (23), and the container door (23) is flange-connected to the vacuum container (20); The receiving tube (21) is arranged on the container door (23).

6. The sample sampling device for energy dispersive X-ray spectrometer according to claim 5, characterized in that: The inner cavity of the vacuum container (20) is cylindrical, and the container door (23) is arranged on the end surface of the inner cavity of the vacuum container (20) and is arranged parallel to the cavity bottom of the inner cavity of the vacuum container (20); The sampling container (30) is arranged at the middle of the bottom of the inner cavity of the vacuum container (20), and the sampling port (31) is arranged toward the container door (23); The receiving tube (21) is vertically arranged in the middle of the container door (23).

7. The sample collection device for energy dispersive X-ray spectrometer according to claim 6, characterized in that: The sampling container (30) is snap-connected to the cavity bottom of the vacuum container (20).

8. The sample sampling device for energy dispersive X-ray spectrometer according to claim 1, characterized in that: The vacuum container (20) and the sampling container (30) are both made of copper.

9. The sample sampling device for energy dispersive X-ray spectrometer according to claim 1, characterized in that: The sampling container (30) is a rectangular parallelepiped container, and the conductive colloid (40) is bonded to the bottom wall of the sampling container (30).

10. A method for using the sample sampling device for an energy dispersive X-ray spectrometer according to claims 1 to 9, characterized in that: The steps include: The airtight door (32) is closed by the remote switch (33), and then the sampling container (30) is placed in the vacuum container (20); The receiving valve (211) is closed, and then the vacuum container (20) is evacuated using a vacuum evacuation mechanism; The sealed door (32) is opened by the remote switch (33), and then the receiving valve (211) is opened, so that the particles in the filter (10) enter the vacuum container (20) under the action of negative pressure and adhere to the conductive colloid (40); The receiving valve (211) is closed, the airtight door (32) is closed via the remote switch (33), and then the vacuum container (20) and the filter (10) are disassembled; Opening the receiving valve (211) to empty the vacuum container (20), and after emptying, taking the sampling container (30) out of the vacuum container (20); The sampling container (30) is placed in a vacuum chamber of an energy dispersive X-ray spectrometer and evacuated, and then the sealed door (32) is opened through the remote switch (33).

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