Gaseous sample injection detection assembly

Abstract

The utility model discloses a gaseous sample injection detection assembly, which belongs to the technical field of gaseous detection, and is characterized by comprising a gas chromatograph body, the bottom of the gas chromatograph body is fixedly connected with a connecting mechanism, and the bottom of the connecting mechanism is movably connected with a pretreatment mechanism; the connecting mechanism realizes movable connection between the gas chromatograph body and the pretreatment mechanism through cooperation of a limiting plate, a limiting column and a box cover, and the pretreatment mechanism and the gas chromatograph body can be conveniently assembled and disassembled through the connecting mode; the pretreatment mechanism can be conveniently maintained, parts can be conveniently replaced or different pretreatment modules can be conveniently replaced according to different detection requirements, a purification pipe and filter non-woven fabrics in the pretreatment mechanism can preliminarily filter gaseous samples, and the filter non-woven fabrics are respectively arranged at the bottom of a gas collecting hood and the bottom of the inner side of the purification pipe; impurities such as solid particles and dust in a gaseous sample can be effectively intercepted, and the impurities are prevented from entering a gas chromatograph.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a gas sample injection and detection component. Background Technology

[0002] With increasing environmental awareness, monitoring various pollutants in the atmosphere, such as sulfur dioxide, nitrogen oxides, and volatile organic compounds, is becoming increasingly important. Accurate collection and analysis of gaseous samples can provide key data for environmental quality assessment, pollution source tracing, and environmental policy formulation.

[0003] To address the aforementioned issues, existing patents have provided solutions. However, existing detection components lack a structure for pre-treating gaseous samples, resulting in the inability to effectively remove interfering substances such as impurities and moisture from the samples, thereby affecting the performance of the detection instrument and the accuracy of the detection results.

[0004] To address this, a gaseous sample injection and detection component is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a gaseous sample injection and detection component that solves the problem that existing gaseous detection systems lack a structure for pre-treating gaseous samples, resulting in the inability to effectively remove interfering substances such as impurities and moisture from the samples, thereby affecting the performance of the detection instrument and the accuracy of the detection results.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gaseous sample injection and detection component, comprising a gas chromatograph body, wherein a connecting mechanism is fixedly connected to the bottom of the gas chromatograph body, and a pretreatment mechanism is movably connected to the bottom of the connecting mechanism;

[0007] The pretreatment mechanism includes a limiting box, an air inlet pipe, a collection tray, a gas collection hood, three purification pipes, a filter non-woven fabric, a drying pipe, and a desiccant. The limiting box is movably connected to the bottom of the connecting mechanism. The air inlet pipe is fixedly connected to both sides on the left side of the limiting box. The collection tray is slidably connected to the bottom of the inner side of the limiting box. The gas collection hood is fixedly connected to the inner side of the limiting box. The purification pipe is fixedly connected to the top of the gas collection hood. The filter non-woven fabric is fixedly connected to the bottom of the gas collection hood and the bottom of the inner side of the purification pipe, respectively. The drying pipe is slidably connected to the inner side of the purification pipe, and the desiccant is placed inside the drying pipe.

[0008] Preferably, the connecting mechanism includes a limiting plate, a limiting post, a box cover, three connecting pipes, a diverter pipe, a connecting ring, and an air outlet hose, with the limiting plate fixedly connected to both sides inside the limiting box.

[0009] Preferably, the limiting post is fixedly connected to the top of the limiting plate, the box cover is slidably connected to the surface of the limiting post, the connecting pipe is fixedly connected to the inside of the box cover, and the bottom of the connecting pipe is slidably connected to the inside of the drying pipe.

[0010] Preferably, the split tube is snapped onto the top of the connecting tube, the connecting ring is fixedly connected to the surface of the top of the split tube and the surface of the bottom of the outlet hose respectively, the left side of the outlet hose is snapped onto the inner side of the top of the split tube, and the right side of the outlet hose is snapped onto the bottom of the gas chromatograph body.

[0011] Preferably, the inner side of the connecting ring is provided with a plurality of connecting holes, and a fixing screw is threadedly connected to the inner side of the connecting holes.

[0012] Preferably, a limiting ring is fixedly connected to the bottom surface of the connecting pipe, and the surface of the limiting ring is coated with an anti-corrosion coating.

[0013] Preferably, a fixing ring is fixedly connected to the surface of the drying tube, and a fixing rod is welded to the surface of the fixing ring.

[0014] Preferably, a handle is fixedly connected to the front side of the collection tray, and the surface of the handle is engraved with anti-slip texture.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The connection mechanism of this application realizes the movable connection between the gas chromatograph body and the pretreatment mechanism through the cooperation of the limiting plate, the limiting column and the box cover. This connection method makes it easy to assemble and disassemble the pretreatment mechanism with the gas chromatograph body, and facilitates the maintenance of the pretreatment mechanism, replacement of parts or replacement of different pretreatment modules according to different detection needs.

[0017] 2. The purification tube and filter non-woven fabric in the pretreatment mechanism of this application can perform preliminary filtration of gaseous samples. The filter non-woven fabric is respectively set at the bottom of the gas collecting hood and the bottom of the inner side of the purification tube, which can effectively intercept solid particles, dust and other impurities in the gaseous sample, prevent these impurities from entering the gas chromatograph, prevent them from clogging the chromatographic column or other components, thereby extending the service life of the gas chromatograph and ensuring the normal operation of the instrument. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the gaseous sample injection and detection component of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the drying tube of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the filter nonwoven fabric of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting pipe of this utility model;

[0022] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the connection hole of this utility model.

[0024] In the diagram, 1. Gas chromatograph body; 2. Connecting mechanism; 21. Limiting plate; 22. Limiting column; 23. Cover; 24. Connecting pipe; 25. Split pipe; 26. Connecting ring; 27. Outlet hose; 3. Pretreatment mechanism; 31. Limiting box; 32. Inlet pipe; 33. Collection tray; 34. Gas collection hood; 35. Purification pipe; 36. Filter non-woven fabric; 37. Drying pipe; 38. Desiccant; 4. Connecting hole; 5. Fixing screw; 6. Limiting ring; 7. Fixing ring; 8. Fixing rod; 9. Handle. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 The present invention provides the following technical solution:

[0027] A gaseous sample injection and detection assembly includes a gas chromatograph body 1, a connecting mechanism 2 fixedly connected to the bottom of the gas chromatograph body 1, and a pretreatment mechanism 3 movably connected to the bottom of the connecting mechanism 2.

[0028] The pretreatment mechanism 3 includes a limiting box 31, an air inlet pipe 32, a collection tray 33, a gas collection hood 34, three purification pipes 35, a filter non-woven fabric 36, a drying pipe 37, and a desiccant 38. The limiting box 31 is movably connected to the bottom of the connecting mechanism 2. The air inlet pipe 32 is fixedly connected to both sides on the left side of the limiting box 31. The collection tray 33 is slidably connected to the bottom inside the limiting box 31. The gas collection hood 34 is fixedly connected to the inside of the limiting box 31. The purification pipe 35 is fixedly connected to the top of the gas collection hood 34. The filter non-woven fabric 36 is fixedly connected to the bottom of the gas collection hood 34 and the bottom inside the purification pipe 35, respectively. The drying pipe 37 is slidably connected to the inside of the purification pipe 35. The desiccant 38 is placed inside the drying pipe 37.

[0029] In this embodiment: the gas chromatograph body 1 is set as the core analytical device of the entire gas sample injection and detection assembly. It can accurately separate and detect pretreated gaseous samples. Different gas components are separated by the built-in chromatographic column, and the detector performs qualitative and quantitative analysis of the separated gas components, thus providing users with accurate gas composition and content information. It is widely used in chemical engineering, environmental monitoring, food testing, and other fields to ensure product quality and environmental safety. The limiting box 31 provides a stable installation space and protective shell for other components of the pretreatment mechanism 3. The inlet pipe 32 is the channel for gaseous samples to enter the pretreatment mechanism 3. The collection tray 33 is used to collect solid particles, dust, and other impurities intercepted during the filtration process. The gas collection hood 34 can collect the gaseous samples entering from the inlet pipe 32 and guide the gas flow towards the purification tube 35, improving the directionality and concentration of the gas flow. This allows the gas to be more evenly distributed into each purification tube 35, ensuring that each purification tube 35 can fully perform its filtration and purification functions, improving the effect and efficiency of pretreatment. As the gas passes through the purification tube 35, impurities are intercepted by the filter non-woven fabric 36, thus achieving preliminary purification of the gas. The filter non-woven fabric 36 can effectively intercept solid particles, dust, and other impurities in the gaseous sample, preventing these impurities from entering the subsequent drying tube 37 and the gas chromatograph body 1, avoiding damage to the instrument or affecting the accuracy of the detection results. The drying tube 37 is slidably connected to the inside of the purification tube 35 to hold the desiccant 38, which can further dry the gaseous sample after preliminary filtration to remove moisture. At the same time, the sliding connection of the drying tube 37 allows the user to easily remove the drying tube 37 from the purification tube 35 for replacement when the desiccant 38 becomes saturated or loses its drying effect, ensuring the continuity and effectiveness of the drying process. The desiccant 38, placed inside the drying tube 37, can absorb moisture in the gaseous sample. The presence of moisture may affect the accuracy of gas chromatography analysis, leading to poor separation results, or even chemical reactions with certain components in the sample. By absorbing moisture through the desiccant 38, the accuracy and reliability of the detection results can be improved.

[0030] Specifically, such as Figure 4 , Figure 5 As shown, the connecting mechanism 2 includes a limiting plate 21, a limiting post 22, a box cover 23, three connecting pipes 24, a diverter pipe 25, a connecting ring 26, and an exhaust hose 27. The limiting plate 21 is fixedly connected to both sides inside the limiting box 31.

[0031] Specifically, such as Figure 4 , Figure 5As shown, the limiting post 22 is fixedly connected to the top of the limiting plate 21, the box cover 23 is slidably connected to the surface of the limiting post 22, the connecting pipe 24 is fixedly connected to the inside of the box cover 23, and the bottom of the connecting pipe 24 is slidably connected to the inside of the drying pipe 37.

[0032] Specifically, such as Figure 4 , Figure 5 As shown, the split tube 25 is snapped onto the top of the connecting tube 24, and the connecting ring 26 is fixedly connected to the top surface of the split tube 25 and the bottom surface of the outlet hose 27 respectively. The left side of the outlet hose 27 is snapped onto the inner side of the top of the split tube 25, and the right side of the outlet hose 27 is snapped onto the bottom of the gas chromatograph body 1.

[0033] In this embodiment: the limiting plate 21 provides a stable mounting base for the limiting column 22, ensuring the stability of the limiting column 22 during use. The limiting column 22 provides a sliding track for the cover 23, allowing the cover 23 to slide along the surface of the limiting column 22. This makes the connection and disassembly between the gas chromatograph body 1 and the pretreatment mechanism 3 more convenient and quick. When maintenance or replacement of parts of the pretreatment mechanism 3 is required, the user can easily achieve this by simply sliding the cover 23, greatly improving the convenience of operation and work efficiency. The cover 23 also protects the connecting pipe 24 and seals the connection between the pretreatment mechanism 3 and the gas chromatograph body 1. The connecting tube 24 can transport the pretreated gaseous sample from the drying tube 37 to the split tube 25. The split tube 25 can evenly split the gaseous sample transported from the connecting tube 24. The connecting ring 26 can fix the connection between the split tube 25 and the outlet hose 27, which can enhance the tightness and sealing of the connection. The outlet hose 27 has a certain degree of flexibility, which is convenient for position adjustment and bending during installation and use, and can adapt to different installation spaces and equipment layouts. At the same time, the outlet hose 27 can smoothly transport the split gaseous sample to the gas chromatograph body 1, ensuring that the sample can enter the analytical equipment for detection in a timely and accurate manner.

[0034] Specifically, such as Figure 6 As shown, the inner side of the connecting ring 26 has several connecting holes 4, and the inner side of the connecting holes 4 is threaded with a fixing screw 5.

[0035] Specifically, such as Figure 4 As shown, a limiting ring 6 is fixedly connected to the bottom surface of the connecting pipe 24, and the surface of the limiting ring 6 is coated with an anti-corrosion coating.

[0036] In this embodiment: By providing the connecting hole 4, an installation position is provided for the fixing screw 5. By providing the fixing screw 5, the connecting ring 26 can be tightly fixed, further enhancing the tightness and reliability of the connection between the diverter pipe 25 and the outlet hose 27. By providing the limiting ring 6, the connecting pipe 24 is prevented from being over-inserted or detached during the sliding connection with the drying pipe 37, ensuring the accuracy and stability of the connection. By providing the anti-corrosion coating, the corrosive components in the gaseous sample can be effectively prevented from corroding the limiting ring 6, extending the service life of the limiting ring 6.

[0037] Specifically, such as Figure 2 As shown, a fixing ring 7 is fixedly connected to the surface of the drying tube 37, and a fixing rod 8 is welded to the surface of the fixing ring 7.

[0038] Specifically, such as Figure 2 As shown, a handle 9 is fixedly connected to the front side of the collection tray 33, and the surface of the handle 9 is engraved with anti-slip texture.

[0039] In this embodiment: by setting the fixing ring 7, an installation base is provided for the fixing rod 8. By setting the fixing rod 8, the user can easily pick up or put in the drying tube 37, and the user can easily replace the desiccant 38 inside the drying tube 37. By setting the handle 9, the operator can easily pull out and insert the collection tray 33. By setting the anti-slip texture, the friction between the operator's hand and the handle 9 is increased.

[0040] Working principle: First, the user connects the right side of the outlet hose 27 to the gas chromatograph body 1. After connection, the user aligns the cover 23 with the limiting column 22 and slowly slides the cover 23 towards the inside of the limiting box 31. When the cover 23 slides down to contact the top of the limiting plate 21, the connecting tube 24 is precisely engaged with the inside of the drying tube 37. At this time, the user uses the fixing screw 5 to firmly bolt the two connecting rings 26 together through the connecting hole 4. Then, the user connects the inlet pipe 32 to the device that outputs gaseous samples. After proper connection, the user starts the device that outputs gaseous samples. With the gas chromatograph body 1 in place, the gaseous sample enters the limiting chamber 31 through the inlet pipe 32 and moves towards the top of the inner side of the limiting chamber 31. When the gaseous sample comes into contact with the filter nonwoven fabric 36 at the bottom of the gas collecting hood 34 during its upward movement, the impurities contained in the sample are intercepted and filtered, and then fall into the inner side of the collection tray 33. Afterward, the gaseous sample, with impurities filtered out, continues to pass through the filter nonwoven fabric 36, moves upward along the inner side of the gas collecting hood 34, and then enters the purification tube 35. The filter nonwoven fabric 36 at the bottom of the purification tube 35 performs secondary fine filtration on the gaseous sample, further removing impurities. After removing residual minute impurities, the gaseous sample, having undergone secondary filtration, then enters the inner side of the drying tube 37. During its upward movement, it comes into full contact with the desiccant 38, which absorbs the moisture contained in the gaseous sample. The moisture-absorbed gaseous sample then continues to move upward along the drying tube 37 into the connecting tube 24. The connecting tube 24 guides the gaseous sample to the split tube 25, which then distributes and guides the gaseous sample to the outlet hose 27. Finally, the outlet hose 27 delivers the multi-stage processed gaseous sample to the interior of the gas chromatograph body 1. The gas chromatograph body 1 then processes the gas... The gas chromatograph is used to perform precise analysis on the gaseous sample. Finally, after all the testing is completed, the user turns off the gas chromatograph body 1 and the device that outputs the gaseous sample. Then, the user separates the gas outlet hose 27 from the gas chromatograph body 1. Next, the user unscrews the fixing screw 5 from the connection hole 4. Then, the user slides the box cover 23 along the limiting post 22 to separate the connecting tube 24 from the drying tube 37. At this time, the user can use the fixing rod 8 to smoothly slide the three drying tubes 37 out from the inside of the purification tube 35 to replace the used desiccant 38 in time, so as to make full preparations for the next testing.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gaseous sample injection detection assembly comprising a gas chromatograph body (1), characterized in that: The bottom of the gas chromatograph body (1) is fixedly connected with a connecting mechanism (2), and the bottom of the connecting mechanism (2) is movably connected with a pretreatment mechanism (3). The pretreatment mechanism (3) comprises a limiting box (31), an air inlet pipe (32), a collection disc (33), a gas collection cover (34), three purification pipes (35), filter non-woven fabrics (36), a drying pipe (37) and a drying agent (38), the limiting box (31) is movably connected to the bottom of the connecting mechanism (2), the air inlet pipe (32) is fixedly connected to the left side of the limiting box (31), the collection disc (33) is slidably connected to the bottom of the inner side of the limiting box (31), the gas collection cover (34) is fixedly connected to the inner side of the limiting box (31), the purification pipe (35) is fixedly connected to the top of the gas collection cover (34), the filter non-woven fabric (36) is fixedly connected to the bottom of the gas collection cover (34) and the bottom of the inner side of the purification pipe (35) respectively, the drying pipe (37) is slidably connected to the inner side of the purification pipe (35), and the drying agent (38) is placed in the inner side of the drying pipe (37).

2. A gaseous sample introduction assembly according to claim 1, wherein: The connecting mechanism (2) comprises a limiting plate (21), a limiting column (22), a box cover (23), three connecting pipes (24), a shunt pipe (25), a connecting ring (26) and an air outlet hose (27), and the limiting plate (21) is fixedly connected to the two sides of the inner side of the limiting box (31).

3. A gaseous sample introduction assembly according to claim 2, wherein: The limiting column (22) is fixedly connected to the top of the limiting plate (21), the box cover (23) is slidably connected to the surface of the limiting column (22), the connecting pipe (24) is fixedly connected to the inner side of the box cover (23), and the bottom of the connecting pipe (24) is slidably connected to the inner side of the drying pipe (37).

4. A gaseous sample introduction assembly according to claim 2, wherein: The shunt pipe (25) is clamped on the top of the connecting pipe (24), the connecting ring (26) is fixedly connected to the surface of the top of the shunt pipe (25) and the surface of the bottom of the air outlet hose (27) respectively, the left side of the air outlet hose (27) is clamped on the inner side of the top of the shunt pipe (25), and the right side of the air outlet hose (27) is clamped on the bottom of the gas chromatograph body (1).

5. A gaseous sample introduction assembly according to claim 2, wherein: A plurality of connecting holes (4) are formed in the inner side of the connecting ring (26), and a fixing screw rod (5) is threadedly connected to the inner side of the connecting hole (4).

6. A gaseous sample introduction assembly according to claim 2, wherein: A limiting ring (6) is fixedly connected to the surface of the bottom of the connecting pipe (24), and the surface of the limiting ring (6) is coated with anticorrosive paint.

7. A gaseous sample introduction assembly according to claim 1, wherein: A fixing ring (7) is fixedly connected to the surface of the drying pipe (37), and a fixing rod (8) is welded to the surface of the fixing ring (7).

8. A gaseous sample introduction assembly according to claim 1, wherein: A handle (9) is fixedly connected to the front side of the collection disc (33), and an anti-skid pattern is engraved on the surface of the handle (9).

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