Pulse discharge detector and use method

Abstract

The invention provides a pulse discharge detector and a use method, and relates to the field of discharge detectors. The pulse discharge detector comprises a support, a pulse power supply and a base are arranged on the support, a main body is arranged at the top of the base, and a sapphire tube is arranged in the main body; the gas circuit assembly comprises a bolt seat, a pipeline, a sealing cap and a hand screwing part, an annular groove is formed in the outer side of the sealing cap, an expansion metal ring is arranged in the annular groove, rubber pads are arranged on the two sides of the expansion metal ring and located in the annular groove, the pipeline is connected with the gas inlet pipe in an inserted mode, and the sealing cap is fixed into the main body through the bolt seat; the fixing assembly comprises a nut seat which is in threaded connection with the bottom of the main body, the nut seat is fixedly connected with a connecting body, and the connecting body is integrally linked with a chromatographic column access end. The gas path assembly realizes good gas path sealing effect and high detection precision of the detector, and the fixing assembly realizes tight fixation of the chromatographic column and ensures the detection precision.

Description

Technical Field

[0001] This invention relates to the field of discharge detector technology, specifically to a pulse discharge detector and its usage method. Background Technology

[0002] The pulse discharge detector is a helium photoionization detector. Using pure helium as the carrier gas, it possesses universal detection capabilities, capable of detecting inorganic gases (such as H2 and O2) and organic compounds (such as hydrocarbons and pesticides), with sensitivity reaching the picometer level and a linear range of 10⁻⁶. 5 By doping with trace amounts of xenon, krypton, or other gases, it can be switched between photoionization and electron capture detectors, supporting spectral analysis and enabling highly sensitive detection of electronegative compounds, such as compounds containing heteroatoms (oxygen, sulfur, halogens), pesticides, and metal complexes. This is called PDECD, with a minimum detectability down to the picogram level and a linear range of 10⁻⁶. 5 .

[0003] In actual use, the inlet and outlet of a pulsed discharge detector need to be repeatedly connected and disconnected. After long-term use, air leakage may occur. Since the pulsed discharge detector requires a certain temperature to operate, the connection between the connectors will inevitably lead to air leakage, thus affecting the detection accuracy. At the same time, since the chromatographic column and the column connector are fixed during actual use, they sometimes need to be disassembled and reconnected repeatedly. If the column connector is not fixed firmly or is misaligned, it will also lead to poor contact and reduced detection accuracy of the discharge detector. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pulse discharge detector and its usage method, which solves the problems of poor detection accuracy and low detection accuracy caused by connector leakage and misalignment of chromatographic column connectors during the use of the pulse discharge detector.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pulse discharge detector: include: A support is provided with a pulse power supply and a base. A main body is provided on the top of the base. A sapphire tube is provided inside the main body. A discharge electrode is provided in the main body on the upper side of the sapphire tube. A chromatographic column detection rod is provided in the main body below the collecting electrode. The pulse power supply is connected to the discharge electrode. An air inlet pipe is provided on the upper side of the main body. A chromatographic column detection rod is provided below the sapphire tube. The air circuit assembly includes a bolt seat, a pipe, a sealing cap, and a hand-tightening part. The pipe passes through the middle of the sealing cap. An annular groove is opened on the outer side of the sealing cap, and an expansion metal ring is provided in the annular groove. Rubber pads are provided on both sides of the expansion metal ring and in the annular groove. The pipe is inserted into the air inlet pipe. The bolt seat is used to fix the pipe and the main body. The sealing cap is fixed in the main body by the bolt seat. The fixing component includes a nut seat threaded to the bottom of the main body, a connecting body fixedly connected to the nut seat, a chromatographic column inlet integrally connected to the connecting body, a connecting groove provided at the end of the connecting body away from the chromatographic column inlet, the connecting groove and the chromatographic column detection rod being inserted into the connecting body, and annularly distributed wedges provided at the end of the connecting body, the end of the wedges being inclined and the middle of the inclined surface abutting against the inner wall of the main body.

[0006] Preferably, a deflection electrode is disposed in the main body below the discharge electrode, and a collecting electrode is disposed in the main body below the deflection electrode. The deflection electrode, discharge electrode, and collecting electrode are all embedded in the sapphire tube.

[0007] Preferably, the discharge electrodes are axially parallel to the center line of the sapphire tube and are symmetrically distributed laterally.

[0008] Preferably, a grounding electrode is provided at the top of the main body, a nitrogen inlet is provided on the upper part of one side of the main body and the height of the nitrogen inlet is higher than the height of the air inlet pipe, and an air outlet pipe is provided on the lower part of one side of the main body. The nitrogen inlet, air inlet pipe and air outlet pipe are all interconnected within the main body.

[0009] Preferably, the hand-tightening part is provided with a locking block, and the bolt seat is provided with a locking groove, and the locking block and the locking groove are interlocked.

[0010] Preferably, the nut seat and the main body are sealed together, and there are grooves between adjacent wedges.

[0011] Preferably, a method of using a pulse discharge detector includes the following steps: Step 1, Column Installation: Screw the nut into the bottom of the main body. The nut allows the connecting groove and the column probe to be inserted. When the nut enters the main body, it causes the inclined surface of the wedge to abut against the column probe. Because of the grooves between the wedges, the column probe is squeezed inward, achieving a stable connection between the column probe and the column access end. Step 2, Gas Circuit Installation: Insert the sealing cap into the main body to connect the pipeline and the air inlet pipe. Then, the slot and the block engage with each other to engage the hand-tightening part and the bolt seat, allowing the bolt seat to be screwed into the main body. The rubber gasket seals the sealing cap and the main body. When the main body is heated, the expanding metal ring expands and squeezes the rubber gasket. During use, the pressure will prevent air leakage. Step 3: After installation, use the detector.

[0012] This invention provides a pulse discharge detector and its usage method. It has the following beneficial effects: 1. This invention involves installing a chromatographic column by screwing a nut into the bottom of the main body. The nut allows the connecting groove and the chromatographic column detection rod to be inserted. When the nut enters the main body, it causes the inclined surface of the wedge to abut against the inside of the chromatographic column detection rod. Because of the grooves between the wedges, the chromatographic column detection rod is squeezed inward, achieving a stable connection between the chromatographic column detection rod and the chromatographic column access end. The chromatographic column and the external connector are precisely connected to each other, achieving accurate detection and precise transmission of information electrical signals, ensuring accurate measurement results. 2. This invention uses an air circuit installation method. The sealing cap is inserted into the main body to connect the pipeline and the air inlet pipe. Then, the slot and the locking block engage with each other to engage the hand-tightening part and the bolt seat, allowing the bolt seat to be screwed into the main body. The rubber gasket achieves a seal between the sealing cap and the main body. After the main body is heated, the expanding metal ring expands and squeezes the rubber gasket. During use, the pressure will not cause air leakage. The pipeline will not leak due to the pressure of the air circuit during actual use and repeated insertion and connection. The detection accuracy is high. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the fixing component of the present invention; Figure 4 This is a perspective view of the fixing component of the present invention; Figure 5 This is a schematic diagram of the gas path assembly of the present invention.

[0014] The components are as follows: 1. Support; 2. Pulse power supply; 3. Base; 4. Main body; 5. Gas path assembly; 6. Grounding electrode; 7. Nitrogen inlet; 8. Inlet pipe; 9. Discharge electrode; 10. Sapphire tube; 11. Deflection electrode; 12. Collecting electrode; 13. Outlet pipe; 14. Column detection rod; 15. Fixing assembly; 16. Nut seat; 17. Column access end; 18. Wedge block; 19. Connector; 20. Connecting groove; 21. Sealing cap; 22. Rubber gasket; 23. Pipeline; 24. Expansion metal ring; 25. Bolt seat; 26. Slot; 27. Tightening part; 28. Locking block. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example:

[0017] like Figure 1 - Figure 5 As shown, an embodiment of the present invention provides a pulse discharge detector: The device includes a support 1, on which a pulse power supply 2 and a base 3 are respectively mounted. A main body 4 is mounted on top of the base 3. A sapphire tube 10 is mounted inside the main body 4. A discharge electrode 9 is mounted inside the main body 4 on one side of the upper part of the sapphire tube 10. A chromatographic column detection rod 14 is mounted inside the main body 4 below the collecting electrode 12. The pulse power supply 2 and the discharge electrode 9 are connected. An air inlet pipe 8 is opened on the upper part of one side of the main body 4. The chromatographic column detection rod 14 is mounted below the sapphire tube 10. The internal fixing elements of the pulse discharge detector are existing mature technologies. The relevant main existing components will not be described in detail here. The air circuit assembly 5 includes a bolt seat 25, a pipe 23, a sealing cap 21, and a hand-tightening part 27. The pipe 23 passes through the middle of the sealing cap 21. The sealing cap 21 has an annular groove on its outer side, and an expansion metal ring 24 is placed inside the annular groove. Rubber gaskets 22 are placed on both sides of the expansion metal ring 24 and inside the annular groove. The pipe 23 and the air inlet pipe 8 are connected. The bolt seat 25 is used to fix the pipe 23 and the main body 4. The sealing cap 21 is fixed inside the main body 4 by the bolt seat 25. During air circuit installation, the sealing cap 21 is inserted into the main body 4 to connect the pipe 23 and the air inlet pipe 8. Then, the slot 26 and the locking block 28 engage with each other to engage the hand-tightening part 27 and the bolt seat 25, allowing the bolt seat 25 to be screwed into the main body 4. The rubber gaskets 22 achieve a seal. The sealing of the cap 21 and the main body 4 is achieved by the expansion of the metal ring 24 and the compression of the rubber pad 22 after the main body 4 is heated. During use, the pressure will not cause air leakage. The pipeline 23 will not leak due to the pressure of the air circuit during actual use and repeated insertion and use. The detection accuracy is high. The expansion metal ring 24 can be made of iron-nickel alloy or copper. When heated, it is fastened to the outside of the sealing cap 21. While sealing with the sealing cap 21, it also achieves the sealing by compression with the inner wall of the main body 4. It also achieves the sealing of the main body 4 and the air inlet pipe 8 and the pipeline 23 by compression of the rubber pad 22. The pipeline 23 and the sealing cap 21 are sealed and fixedly connected. The bolt seat 25 is sleeved on the outside of the pipeline 23 and rotates on the outside of the pipeline 23. The fixing component 15 includes a nut seat 16 threaded to the bottom of the main body 4. The nut seat 16 is fixedly connected to a connector 19, which is integrally connected to a chromatographic column inlet 17. The end of the connector 19 away from the chromatographic column inlet 17 is provided with a connecting groove 20, which is inserted into the chromatographic column detection rod 14. The end of the connector 19 is provided with annularly distributed wedges 18, the ends of which are inclined and the middle of the inclined surface abuts against the inner wall of the main body 4. When the chromatographic column is installed, the nut seat 16 is screwed into the bottom of the main body 4, and the nut seat 16 causes the connecting groove 20 and the chromatographic column detection rod 14 to be inserted. When the nut seat 16 enters the main body 4, it causes the inclined surface of the wedges 18 to abut against the chromatographic column detection rod 14. Because of the grooves between the wedges 18, the chromatographic column detection rod 14 is squeezed inward, achieving a stable connection between the chromatographic column detection rod 14 and the chromatographic column inlet. The chromatographic column is precisely connected to the external connector, achieving accurate detection accuracy and precise transmission of information electrical signals, ensuring accurate measurement results.

[0018] A deflection electrode 11 is disposed in the main body 4 below the discharge electrode 9, and a collection electrode 12 is disposed in the main body 4 below the deflection electrode 11. The deflection electrode 11, the discharge electrode 9, and the collection electrode 12 are all embedded in the sapphire tube 10.

[0019] The discharge electrode 9 is axially parallel to the center line of the sapphire tube 10 and is symmetrically distributed laterally.

[0020] The top of the main body 4 is provided with a grounding electrode 6. A nitrogen inlet 7 is provided on the upper part of one side of the main body 4, and the height of the nitrogen inlet 7 is higher than the height of the air inlet pipe 8. An air outlet pipe 13 is provided on the lower part of one side of the main body 4. The nitrogen inlet 7, the air inlet pipe 8 and the air outlet pipe 13 are all interconnected inside the main body 4.

[0021] The hand-tightening part 27 is provided with a locking block 28, and the bolt seat 25 is provided with a locking groove 26. The locking block 28 and the locking groove 26 are interlocked and engaged with each other.

[0022] The nut seat 16 and the main body 4 are sealed together, and there are grooves between adjacent wedges 18.

[0023] Example 2:

[0024] Reference Figure 1 - Figure 5 As shown, this embodiment of the invention provides a method for using a pulse discharge detector, including the following steps: Step 1, Column Installation: Screw the nut seat 16 into the bottom of the main body 4. The nut seat 16 allows the connecting groove 20 and the column detection rod 14 to be inserted. When the nut seat 16 enters the main body 4, it causes the inclined surface of the wedge block 18 to abut against the column detection rod 14. Because of the groove between the wedge blocks 18, the column detection rod 14 is squeezed inward, so as to achieve a stable connection between the column detection rod 14 and the column access end 17. Step 2, Gas Circuit Installation: The sealing cap 21 is inserted into the main body 4 to connect the pipe 23 and the air inlet pipe 8. Then, the slot 26 and the block 28 engage with each other to engage the hand-tightening part 27 and the bolt seat 25, allowing the bolt seat 25 to be screwed into the main body 4. The rubber gasket 22 seals the sealing cap 21 and the main body 4. After the main body 4 is heated, the expanding metal ring 24 expands and squeezes the rubber gasket 22. During use, the pressure will not cause air leakage. Step 3: After installation, use the detector.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulse discharge detector, characterized in that: include: A support (1) is provided with a pulse power supply (2) and a base (3). A main body (4) is provided on the top of the base (3). A sapphire tube (10) is provided inside the main body (4). A discharge electrode (9) is provided inside the main body (4) on one side of the upper part of the sapphire tube (10). A chromatographic column detection rod (14) is provided inside the main body (4) below the collecting electrode (12). The pulse power supply (2) and the discharge electrode (9) are connected. An air inlet pipe (8) is provided on the upper part of one side of the main body (4). A chromatographic column detection rod (14) is provided below the sapphire tube (10). The air circuit assembly (5) includes a bolt seat (25), a pipe (23), a sealing cap (21), and a hand-tightening part (27). The pipe (23) passes through the middle of the sealing cap (21). The sealing cap (21) has an annular groove on its outer side and an expansion metal ring (24) is provided in the annular groove. Rubber pads (22) are provided on both sides of the expansion metal ring (24) and in the annular groove. The pipe (23) is connected to the air inlet pipe (8). The bolt seat (25) is used to fix the pipe (23) and the main body (4). The sealing cap (21) is fixed in the main body (4) by the bolt seat (25). The fixing component (15) includes a nut seat (16) threaded to the bottom of the main body (4), the nut seat (16) is fixedly connected to a connector (19), the connector (19) is integrally connected to a chromatographic column inlet (17), the end of the connector (19) away from the chromatographic column inlet (17) is provided with a connecting groove (20), the connecting groove (20) and the chromatographic column detection rod (14) are inserted into each other, the end of the connector (19) is provided with annularly distributed wedges (18), the end of the wedges (18) is set with an inclined surface and the middle part of the inclined surface abuts against the inner wall of the main body (4).

2. The pulse discharge detector according to claim 1, characterized in that: A deflection electrode (11) is provided in the main body (4) below the discharge electrode (9), and a collection electrode (12) is provided in the main body (4) below the deflection electrode (11). The deflection electrode (11), discharge electrode (9) and collection electrode (12) are all embedded in the sapphire tube (10).

3. A pulse discharge detector according to claim 1, characterized in that: The discharge electrode (9) is axially parallel to the center line of the sapphire tube (10) and is symmetrically distributed laterally.

4. A pulse discharge detector according to claim 1, characterized in that: The top of the main body (4) is provided with a grounding electrode (6), a nitrogen inlet (7) is provided on the upper part of one side of the main body (4) and the height of the nitrogen inlet (7) is higher than the height of the air inlet pipe (8), and an air outlet pipe (13) is provided on the lower part of one side of the main body (4). The nitrogen inlet (7), the air inlet pipe (8) and the air outlet pipe (13) are all interconnected inside the main body (4).

5. A pulse discharge detector according to claim 1, characterized in that: The hand-tightening part (27) is provided with a locking block (28), and the bolt seat (25) is provided with a locking groove (26). The locking block (28) and the locking groove (26) are inserted and engaged with each other.

6. A pulse discharge detector according to claim 1, characterized in that: The nut seat (16) and the main body (4) are sealed together, and there is a groove between the adjacent wedges (18).

7. The method of using a pulse discharge detector according to claims 1-6, characterized in that: Includes the following steps: Step 1, Column Installation: Screw the nut seat (16) into the bottom of the main body (4). The nut seat (16) allows the connecting groove (20) and the column detection rod (14) to be inserted. When the nut seat (16) enters the main body (4), it drives the inclined surface of the wedge (18) to abut against the column detection rod (14). Because of the groove between the wedges (18), the column detection rod (14) is squeezed inward, so as to achieve a stable connection between the column detection rod (14) and the column access end (17). Step 2, gas line installation: Insert the sealing cap (21) into the main body (4) to connect the pipe (23) and the air inlet pipe (8). Then, the slot (26) and the block (28) engage with each other to engage the hand-tightening part (27) and the bolt seat (25) to screw the bolt seat (25) into the main body (4). The rubber gasket (22) seals the sealing cap (21) and the main body (4). After the main body (4) is heated, the expanding metal ring (24) expands and squeezes the rubber gasket (22). During use, the pressure will not cause air leakage. Step 3: After installation, use the detector.

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