Gas chromatograph gas leakage detection device based on xenon excitation plasma method

Abstract

The utility model discloses a gas chromatograph gas leakage detection device based on a xenon excitation plasma method, which belongs to the field of gas leakage detection and comprises a detector. Two groups of limiting assemblies are assembled on the bearing seat; a bearing seat is installed in the detector, a lifting assembly is assembled on the bearing seat, and a ventilation assembly is assembled on the lifting assembly. The gas chromatograph gas leakage detection device based on the xenon excitation plasma method can detect very tiny ion concentration change, so that a gas leakage point can be detected very sensitively, even very small gas leakage can be found, and the detection accuracy is improved. Meanwhile, the arranged ion detector can monitor the change of ion concentration in real time, and the specific position of gas leakage can be accurately positioned in combination with argon excitation; and the two limiting assemblies can be adjusted according to gas chromatograph bodies with different sizes and shapes, so that the clamping device has better universality and adaptability, and is suitable for clamping and limiting instruments of various models.

Description

Technical Field

[0001] The utility model belongs to the field of air leakage detection, and particularly relates to a gas chromatograph air leakage detection device based on the method of xenon-excited plasma. Background Art

[0002] A gas chromatograph is an analytical instrument widely used in the fields of chemistry, biology, medicine, environmental protection, etc. However, during the long-term use of a gas chromatograph, due to the wear or aging of components such as connecting pipes, gaskets, and valves, air leakage is likely to occur, which not only affects the analytical performance of the gas chromatograph but also may pose safety hazards.

[0003] Under the existing technology, most gas chromatographs use the water-tight method to detect the gas chromatograph. For example, in the Chinese patent publication No. CN218916696U, a gas chromatograph air leakage detection device is pointed out. In this cited document, through the provided air leakage detection mechanism and sealed connection mechanism, people can conveniently observe the air leakage situation of the gas chromatograph, improve the detection efficiency of the device. Secondly, the connection sealing performance of the air leakage detection device can be improved, and it is also convenient for people to adjust the connection position of the device;

[0004] In the actual use of the above-cited patent, although the gas chromatograph can be detected for air leakage by using the generation between the water tank and the bubbles, it still has certain limitations in use. That is, in this document, the air leakage is judged by observing the generation of bubbles. This method is more effective for large air leakage points, but for small air leakage points, since the position where the bubbles are generated is not precise enough and difficult to observe, it is difficult to accurately locate the specific position of the air leakage, resulting in some key air leakage points being missed; Therefore, in view of the problems in the cited document, a gas chromatograph air leakage detection device based on the method of xenon-excited plasma is proposed to solve the problems. Summary of the Utility Model

[0005] In view of one or more of the above defects or improvement requirements of the existing technology, the utility model provides a gas chromatograph air leakage detection device based on the method of xenon-excited plasma, which has the advantages of accurately detecting the air leakage points of the gas chromatograph and realizing precise air leakage detection.

[0006] To achieve the above object, the utility model provides a gas chromatograph air leakage detection device based on the method of xenon-excited plasma, including a detector; a detection cavity for detection is formed inside the detector;

[0007] Two linear lead screw modules are assembled and arranged inside the detector, a slider seat is slidably arranged on the two linear lead screw modules, and a support seat is assembled and arranged on the slider seat; two limit components are assembled and arranged on the support seat;

[0008] A carrier seat is installed inside the detector. A lifting assembly is assembled on the carrier seat, and a ventilation assembly is assembled on the lifting assembly.

[0009] Among them, the lifting assembly includes a plurality of compression cylinders arranged on the carrier seat. Telescopic shafts are slidably arranged in the plurality of compression cylinders. A connecting plate is connected to the lower end surfaces of the plurality of telescopic shafts together.

[0010] The ventilation assembly includes an argon gas source pump arranged on the connecting plate. A ventilation pipe is communicated with the argon gas source pump. A ventilation plate is further installed at the bottom of the connecting plate. A cavity is formed in the ventilation plate and is communicated with a plurality of air pipes. One end of the ventilation pipe penetrates through the connecting plate and the ventilation plate and is communicated with the air pipe.

[0011] As a further improvement of the present invention, an excitation electrode is installed on each of the air pipes; a flow regulating valve is further communicated and arranged outside the ventilation pipe.

[0012] As a further improvement of the present invention, the ventilation assembly further includes a plurality of ion detectors arranged on the carrier seat. The plurality of ion detectors are arranged in a U-shaped manner around the side surface of the supporting seat.

[0013] As a further improvement of the present invention, the lifting assembly includes a guide rod cylinder arranged on the carrier seat. A connecting seat is fixedly installed on the upper end surface of the connecting plate. The output end of the guide rod cylinder extends vertically and is connected to the connecting seat.

[0014] As a further improvement of the present invention, a bearing seat is assembled in the supporting seat; both groups of limiting assemblies include two columns arranged on the upper end surface of the supporting seat. A support plate is carried by the upper end surfaces of the two columns together. A plurality of compression columns are installed on the side surface of the support plate. Sleeves are slidably arranged outside the compression columns. A pressing plate is installed on the side surfaces of the plurality of sleeves together; a compression spring is sleeved outside the compression column; both ends of the compression spring are tightly abutted between the pressing plate and the support plate.

[0015] Generally speaking, compared with the prior art, the beneficial effects of the above technical solutions conceived by the present invention include:

[0016] The leak detection device for a gas chromatograph based on the xenon-excited plasma method of the present utility model, in actual use, through the mutual movement and cooperation of the lifting component and the ventilation component set. After the trachea is connected to the gas chromatograph body, the user can then turn on the argon gas source pump and the flow regulating valve. At this time, through the connection process of the ventilation pipe, the argon gas can move through the ventilation pipe into the trachea and be injected into the gas chromatograph body through the trachea. At this time, when the excitation electrode generates a high-frequency electric field when powered on, the argon gas is ionized to form a plasma. When there is a leakage phenomenon in the gas chromatograph body, the argon gas concentration around the leakage part will change, thereby affecting the ion concentration of the plasma. At this time, the ion detector arranged in a surrounding manner can monitor the change of the ion concentration in real time, and then transmit it to the monitoring instrument for the user to observe and process. Compared with the watertight detection method in the cited document, the present application can detect very small changes in ion concentration, so it can detect the leakage point very sensitively, and even the smallest leakage can be discovered. At the same time, the ion detector set can also monitor the change of the ion concentration in real time, and combined with the argon gas excitation, it can accurately locate the specific position of the leakage.

[0017] The leak detection device for a gas chromatograph based on the xenon-excited plasma method of the present utility model elastically clamps the gas chromatograph body through the two groups of limiting components set. When the gas chromatograph body is placed between the two groups of limiting components, it can be stably placed. At the same time, the two groups of limiting components set can be adjusted according to the gas chromatograph bodies of different sizes and shapes, and have good versatility and adaptability, and are suitable for the clamping and limiting of various models of instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall installation structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the installation structure of the lifting component and the ventilation component inside the detector of the present utility model;

[0020] Figure 3 is a schematic diagram of the installation structure of the ventilation component on the support seat of the present utility model;

[0021] Figure 4 is a schematic diagram of the installation structure of the support seat and the limiting component of the present utility model.

[0022] In all the attached drawings, the same reference numerals represent the same technical features, specifically: 1. detector; 2. linear ball screw module; 3. supporting seat; 31. bearing seat; 4. limiting component; 41. pillar; 42. support plate; 43. compression column; 44. sleeve; 45. abutting plate; 46. compression spring; 5. bearing seat; 6. lifting component; 61. guide rod cylinder; 62. connecting seat; 63. connecting plate; 64. compression cylinder; 65. telescopic shaft; 7. ventilation component; 71. argon gas source pump; 72. ventilation pipe; 73. flow regulating valve; 74. ventilation plate; 75. air pipe; 76. excitation electrode; 77. ion detector. Detailed implementation mode

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment

[0025] Provided by Figures 1-4 There is a gas chromatograph leak detection device based on the xenon gas excitation plasma method, including a detector 1; a detection cavity for detection is formed in the detector 1;

[0026] Two groups of linear ball screw modules 2 are assembled and arranged in the detector 1, a slider seat is slidably arranged on the two groups of linear ball screw modules 2, and a supporting seat 3 is assembled and arranged on the slider seat; two groups of limiting components 4 are assembled and arranged on the supporting seat 3;

[0027] A bearing seat 5 is installed in the detector 1, a lifting component 6 is assembled and arranged on the bearing seat 5, and a ventilation component 7 is assembled and arranged on the lifting component 6;

[0028] Among them, the lifting component 6 includes a plurality of compression cylinders 64 arranged on the bearing seat 5, telescopic shafts 65 are slidably arranged in the plurality of compression cylinders 64, and a connecting plate 63 is commonly connected to the lower end surfaces of the plurality of telescopic shafts 65;

[0029] The ventilation component 7 includes an argon gas source pump 71 arranged on the connecting plate 63, a ventilation pipe 72 is communicated with the argon gas source pump 71, a ventilation plate 74 is further installed at the bottom of the connecting plate 63, a cavity is formed in the ventilation plate 74 and is communicated with a plurality of air pipes 75, and one end of the ventilation pipe 72 penetrates through the connecting plate 63 and the ventilation plate 74 and is communicated with the air pipe 75.

[0030] In this embodiment, during actual use, through the mutual movement and cooperation of the lifting component 6 and the ventilation component 7, after the trachea 75 is connected to the gas chromatograph body, the user can then turn on the argon gas source pump 71 and the flow regulating valve 73. At this time, through the connection process of the ventilation pipe 72, argon gas can move through the ventilation pipe 72 into the trachea 75 and be injected into the gas chromatograph body through the trachea 75. At this time, when the excitation electrode 76 generates a high-frequency electric field when powered on, the argon gas is ionized to form a plasma. When there is a gas leakage in the gas chromatograph body, the argon gas concentration around the leakage point will change, thereby affecting the ion concentration of the plasma. At this time, the ion detector 77 arranged in a surrounding manner can monitor the change of the ion concentration in real time, and then transmit it to the monitoring instrument for the user to observe and process. Compared with the watertight detection method in the cited document, this application can detect very small changes in ion concentration, so it can detect the leakage point very sensitively, and even the smallest leakage can be detected. At the same time, the ion detector 77 arranged can also monitor the change of the ion concentration in real time, and combined with the argon gas excitation, it can accurately locate the specific position of the gas leakage.

[0031] Furthermore, through the elastic clamping of the gas chromatograph body by the two groups of limiting components 4 arranged, when the gas chromatograph body is placed between the two groups of limiting components 4, it can be stably placed. At the same time, the two groups of limiting components 4 arranged can be adjusted according to the gas chromatograph bodies of different sizes and shapes. At the same time, through the lifting process of the ventilation component 7 by the lifting component 6, the ventilation component 7 can also perform the connection process on the gas chromatograph bodies of different height dimensions, thereby further making the detection device of this application have better versatility and adaptability, and being suitable for the clamping and limiting of various models of instruments.

[0032] Furthermore, in the preferred embodiment, as shown in the embodiment Figure 1 shown, the front end face of the detector 1 is rotatably connected with a detection box door through a hardware hinge, and the detection box door arranged can seal the detector 1.

[0033] Specifically, referring to Figures 2-3 , an excitation electrode 76 is installed on each trachea 75; a flow regulating valve 73 is also connected and arranged outside the ventilation pipe 72.

[0034] In this embodiment, through the installation of the excitation electrode 76 on the trachea 75, during actual use, when the user controls the connection power supply of the excitation electrode 76, the excitation electrode 76 arranged at this time is driven, and the excitation electrode 76 generates a high-frequency electric field when powered on, ionizing the argon gas to form a plasma;

[0035] It should be noted that the power connection method of the excitation electrode 76 is prior art, and the control circuit can be implemented by simple programming by those skilled in the art, which belongs to the common general knowledge in the art. Only its use is involved without modification, so the control method and circuit connection will not be described in detail.

[0036] Furthermore, the flow regulating valve 73 provided can be used to control the input flow rate of argon flowing in the trachea 75.

[0037] Specifically, referring to Figures 2-3 , the ventilation assembly 7 further includes a plurality of ion detectors 77 provided on the bearing seat 5, and the plurality of ion detectors 77 are arranged in a U shape around the side surface of the supporting seat 3.

[0038] In this embodiment, the ion detector 77 provided can be used to detect the change in ion concentration in the plasma; when there is a gas leakage in the gas chromatograph body, the argon concentration around the leakage part will change, thereby affecting the ion concentration of the plasma; during this period, the ion detector 77 can monitor the change in ion concentration in real time and transmit the detection result to the monitoring instrument. In a preferred embodiment, the monitoring instrument provided can be internally provided with a data processing system, and the data processing system provided can be used to process the data of the ion detector 77, and then generate a report on the leakage position and leakage degree according to the detection result, which is convenient for the user to perform maintenance and replacement;

[0039] It should be noted that the ion detector 77 provided and its data processing data processing system are prior art, and its control circuit and data processing method can be implemented by simple programming by those skilled in the art, which belongs to the common general knowledge in the art. Only its use is involved without modification, so the control method and circuit connection will not be described in detail.

[0040] Specifically, referring to Figures 2-3 , the lifting assembly 6 includes a guide rod cylinder 61 provided on the bearing seat 5, a connecting seat 62 is fixedly installed on the upper end surface of the connecting plate 63, and the output end of the guide rod cylinder 61 extends vertically and is connected to the connecting seat 62.

[0041] In this embodiment, through the connection of the guide rod cylinder 61 and the connecting plate 63 in the lifting assembly 6 provided, in actual use, when the gas chromatograph body is moved to the lower part of the lifting assembly 6 via the supporting seat 3, at this time the user can control the guide rod cylinder 61, so that the guide rod cylinder 61 drives the connecting seat 62 and the connecting plate 63 connected to its output end to move towards the side of the gas chromatograph body as a whole; at this time, through the control of the ventilation assembly 7 by the lifting assembly 6, the ventilation assembly 7 can adaptively adjust to gas chromatograph bodies of different sizes, thereby facilitating the ventilation assembly 7 to detect the gas chromatograph body.

[0042] Specifically, referring to Figure 4 , a bearing seat 31 is assembled and arranged inside the supporting seat 3; both groups of limiting components 4 include two support columns 41 arranged on the upper end surface of the supporting seat 3. A support plate 42 is jointly borne on the upper end surfaces of the two support columns 41. A plurality of compression columns 43 are installed on the side surface of the support plate 42. A sleeve 44 is slidably arranged outside the compression column 43. A plurality of sleeves 44 are jointly installed with a pressing plate 45 on the side surface; a compression spring 46 is sleeved outside the compression column 43; both ends of the compression spring 46 are tightly abutted between the pressing plate 45 and the support plate 42.

[0043] In this embodiment, when the user clamps the gas chromatograph body, by placing the gas chromatograph body between the two pressing plates 45, at this time, due to the compression of the compression spring 46 by the pressing plate 45, the compression spring 46 can be compressed. At this time, the set sleeve 44 can move into the compression column 43. When the gas chromatograph body is completely placed between the two pressing plates 45, at this time, through the reset and rebound of the compression spring 46, the two pressing plates 45 can elastically clamp the gas chromatograph body;

[0044] Furthermore, the bearing seat 31 arranged inside the supporting seat 3 can be used to control the rotation of the gas chromatograph body, so that the gas chromatograph body can perform rotation detection at different angles.

[0045] The gas chromatograph leak detection device based on the xenon-excited plasma method of the present utility model:

[0046] The first step: In actual use, when the user needs to detect the leakage of the gas chromatograph body, by opening the detection box door of the detector 1, then controlling the two groups of linear lead screw modules 2, so that the supporting seat 3 moves to the detection box door of the detector 1. Then the user places the gas chromatograph body to be detected on the supporting seat 3 and makes it between the two groups of limiting components 4, and uses the two groups of limiting components 4 arranged to elastically clamp the gas chromatograph body and position it on the supporting seat 3; then control the linear lead screw module 2 again to make the supporting seat 3 drive the limiting component 4 to move below the lifting component 6;

[0047] The second step: When the gas chromatograph body moves below the lifting component 6 via the supporting seat 3, at this time the user can control the guide rod cylinder 61, so that the guide rod cylinder 61 drives the connecting seat 62 and the connecting plate 63 connected to its output end to move towards the side of the gas chromatograph body as a whole until the air pipe 75 and the excitation electrode 76 located on the connecting plate 63 move to the side of the gas chromatograph body. Then the user controls the air pipe 75 to move into the gas chromatograph body and hermetically connect the air pipe 75 with the chromatographic column of the gas chromatograph body;

[0048] Step 3: After the trachea 75 is connected to the gas chromatograph body, the user can then turn on the argon gas source pump 71 and the flow regulating valve 73. At this time, through the connection process of the ventilation pipe 72, the argon gas can move into the trachea 75 through the ventilation pipe 72 and be injected into the gas chromatograph body through the trachea 75. At this time, the user controls the power supply to drive the excitation electrode 76. At this time, when the excitation electrode 76 is powered on, a high-frequency electric field is generated, causing the argon gas to ionize to form a plasma. When there is a gas leakage in the gas chromatograph body, the argon gas concentration around the leakage part will change, thereby affecting the ion concentration of the plasma. At this time, the ion detector 77 arranged in a surrounding manner can monitor the change of the ion concentration in real time, and then transmit it to the monitoring instrument for the user to observe and process. The set monitoring instrument can be used to receive the signal of the ion detector 77, process and analyze the signal to judge whether there is a gas leakage in the gas chromatograph body. At the same time, the monitoring instrument can also generate a report on the leakage location and leakage degree according to the detection result, which is convenient for the user to repair and replace.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas chromatograph leak detection device based on a xenon-excited plasma method, characterized in that; The invention comprises a detector (1); a detection cavity for detection is formed in the detector (1); The detector (1) is provided with two sets of linear screw modules (2), the two sets of linear screw modules (2) are slidably provided with slider seats, the slider seats are provided with supporting seats (3), and the supporting seats (3) are provided with two sets of limit assemblies (4); A bearing seat (5) is installed in the detector (1), a lifting assembly (6) is mounted on the bearing seat (5), and a ventilation assembly (7) is mounted on the lifting assembly (6); The lifting assembly (6) comprises a plurality of compression cylinders (64) arranged on the bearing seat (5), a telescopic shaft (65) is slidably arranged in each of the compression cylinders (64), and the lower end surfaces of the plurality of telescopic shafts (65) are commonly connected to a connecting plate (63); The ventilation assembly (7) comprises an argon gas source pump (71) arranged on the connecting plate (63), and a ventilation pipe (72) is connected to the argon gas source pump (71). A ventilation plate (74) is also installed at the bottom of the connecting plate (63). A cavity is formed in the ventilation plate (74) and is connected to a plurality of air pipes (75). One end of the ventilation pipe (72) passes through the connecting plate (63) and the ventilation plate (74) and is connected to the air pipe (75).

2. The gas chromatograph leakage detection device based on the xenon excitation plasma method according to claim 1, characterized in that: An excitation electrode (76) is installed on each of the air pipes (75); and a flow regulating valve (73) is also provided outside the air pipe (72).

3. The gas chromatograph leakage detection device based on the xenon excitation plasma method according to claim 1, characterized in that: The ventilation assembly (7) further comprises a plurality of ion detectors (77) arranged on the supporting seat (5), wherein the plurality of ion detectors (77) are arranged in a U-shape and surround the side surface of the supporting seat (3).

4. The gas chromatograph leakage detection device based on the xenon excitation plasma method according to claim 1, characterized in that: The lifting assembly (6) comprises a guide rod cylinder (61) arranged on a bearing seat (5), a connecting seat (62) is fixedly mounted on the upper end surface of the connecting plate (63), and an output end of the guide rod cylinder (61) extends vertically and is connected to the connecting seat (62).

5. The gas chromatograph leakage detection device based on the xenon excitation plasma method according to claim 1, characterized in that: A bearing seat (31) is installed inside the support seat (3); the two groups of limit assemblies (4) each include two pillars (41) arranged on the upper end surface of the support seat (3); the upper end surfaces of the two pillars (41) jointly support a support plate (42); a plurality of compression columns (43) are installed on the side of the support plate (42); a sleeve (44) is slidably arranged outside the compression column (43); a plurality of sleeves (44) are jointly installed on the side of the sleeves (44); a compression spring (46) is sleeved outside the compression column (43); and both ends of the compression spring (46) are tightly arranged between the support plate (45) and the support plate (42).

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