A gas chromatography inlet anti-contamination split device

Abstract

This utility model relates to the technical field of gas chromatography analysis equipment, and discloses a gas chromatography inlet anti-contamination splitting device, including a housing, a filter mechanism at the top of the housing, an inlet connector at the top of the filter mechanism, a waste gas treatment mechanism on the right side of the outer wall of the housing, a flow equalization ring fixedly connected to the top of the inner wall of the housing, a connecting pipe connected to the bottom of the flow equalization ring, a threaded connector connected to the bottom of the connecting pipe, a splitting component on the outer wall of the connecting pipe, and a carrier gas component on the outer wall of the flow equalization ring. In this utility model, the sample enters the adsorption column after being filtered through multiple layers. The heater powers the heating wire to heat the sample, and then the sample is evenly distributed through the flow equalization ring and split into the chromatograph through the splitting pipe, effectively avoiding inlet contamination and improving the problems of uneven sample vaporization and inaccurate splitting ratio caused by inlet contamination in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of gas chromatography analysis equipment technology, and in particular to a gas chromatography inlet anti-contamination diversion device. Background Technology

[0002] Gas chromatography (GC) is an important separation and analysis method widely used in chemical, food, environmental monitoring, and pharmaceutical fields for qualitative and quantitative analysis of chemical components in complex mixtures. The GC inlet split device is a key component of the GC instrument. Its main function is to split the vaporized sample according to a certain ratio during the injection process. One part enters the chromatographic column for separation and analysis, while the other part is discharged from the system. This ensures that the amount of sample entering the chromatographic column is suitable for its separation capacity, avoids column overload, and thus obtains accurate and reliable analytical results.

[0003] Existing gas chromatography injection port split devices typically consist of an injection port, a splitter, a carrier gas system, and connecting pipes. In operation, the sample is injected into the injection port through the injector and instantly vaporizes within the port. The carrier gas carries the vaporized sample into the splitter. In the splitter, according to the set split ratio, part of the sample enters the chromatographic column with the carrier gas, while the other part exits from the split outlet. However, in actual use, the injection port is highly susceptible to contamination by impurities. This is because the sample itself may contain various impurities, such as solid particles and high-boiling-point substances. When the sample vaporizes upon injection into the injection port, solid particles can... It may remain directly inside the injection port, clogging the injection channel; high-boiling-point substances may condense in the low-temperature region of the injection port after vaporization, gradually accumulating to form dirt. In addition, if the carrier gas is not strictly purified, trace impurities carried in it will also deposit at the injection port. After the injection port is contaminated, it will lead to uneven sample vaporization and inaccurate split ratio, which will seriously affect the accuracy and repeatability of the analysis results. At the same time, in order to solve the contamination problem, the injection port needs to be cleaned and maintained frequently, which not only increases the workload of operators, but also introduces new errors due to the disassembly and installation process, reducing the efficiency of the instrument. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a gas chromatography inlet anti-contamination splitting device, which aims to improve the problem in the prior art where contamination of the inlet leads to uneven sample vaporization, inaccurate splitting ratio, and thus seriously affects the accuracy and repeatability of analytical results.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gas chromatograph inlet anti-contamination diversion device, comprising a housing, a filter mechanism at the top of the housing, an inlet connector at the top of the filter mechanism, a waste gas treatment mechanism on the right side of the outer wall of the housing, a flow equalization ring fixedly connected to the top of the inner wall of the housing, a connecting pipe connected to the bottom of the flow equalization ring, a threaded connector connected to the bottom of the connecting pipe, a diversion component on the outer wall of the connecting pipe, a carrier gas component on the outer wall of the flow equalization ring, and a quick-connect component at the bottom of the inlet connector;

[0006] The filtration mechanism includes an adsorption column, the bottom of which is threaded to the middle of the top of the housing. A heating wire is fixedly connected to the outer wall of the adsorption column, and a sealing shell is fixedly connected to the outer wall of the adsorption column. A heater is fixedly connected to the left side of the outer wall of the sealing shell. A filter shell is fixedly connected to the top of the adsorption column, and filter cotton is fixedly connected to the bottom of the inner wall of the filter shell. A filter plate is fixedly connected to the middle of the inner wall of the filter shell, and a filter screen is fixedly connected to the middle of the inner wall of the filter shell. The top of the filter shell is attached to the bottom of the filter plate.

[0007] As a further description of the above technical solution:

[0008] The exhaust gas treatment mechanism includes a treatment box. The left side of the outer wall of the treatment box is fixedly connected to the right side of the outer wall of the housing. A placement rack is fixedly connected to the middle of the inner wall of the treatment box. The top of the placement rack has multiple ventilation holes. A limit ring is fixedly connected to the top of the treatment box. Heating lamps are fixedly connected to both the left and right sides of the inner wall of the treatment box. A sealing cover is rotatably connected to the top of the treatment box. A fixing component is provided on the right side of the outer wall of the sealing cover.

[0009] As a further description of the above technical solution:

[0010] The fixing component includes two buckles, the outer left side of the two buckles is fixedly connected to the outer right side of the sealing cover, and the outer right side of the processing box is fixedly connected to a hook, and the two hooks are respectively engaged with the corresponding buckles.

[0011] As a further description of the above technical solution:

[0012] The diversion assembly includes a diversion pipe, the left end of which is connected to the right side of the outer wall of the connecting pipe, a control valve is connected to the left side of the outer wall of the connecting pipe, and a one-way valve is fixedly connected to the right side of the outer wall of the diversion pipe.

[0013] As a further description of the above technical solution:

[0014] The carrier gas assembly includes an inlet pipe, the bottom end of which is connected to the front side of the outer wall of the flow equalization ring, and the top end of which is connected to the front side of the outer wall of the sealing shell. An exhaust pipe is connected to the right side of the outer wall of the adsorption column, and the bottom end of the exhaust pipe is connected to the diverter pipe. A connecting seat is connected to the front side of the outer wall of the inlet pipe.

[0015] As a further description of the above technical solution:

[0016] The quick-connect assembly includes two inserts, the top ends of which are fixedly connected to the front and rear sides of the bottom of the inlet connector, respectively. The front and rear sides of the top of the filter housing are provided with slots, and the two inserts are slidably connected to the corresponding slots. The outer walls of the two inserts are provided with reserved grooves on opposite sides, and springs are fixedly connected to the inner walls of the two reserved grooves. The opposite ends of the two springs are fixedly connected with locking blocks, and the two locking blocks are slidably connected to the corresponding reserved grooves. The front and rear sides of the outer wall of the filter housing are provided with locking slots, and the two locking blocks are engaged with the corresponding locking slots.

[0017] As a further description of the above technical solution:

[0018] A sealing gasket is fixedly connected to the top of the filter housing, and the bottom ends of the two clips pass through the sealing gasket.

[0019] As a further description of the above technical solution:

[0020] A discharge pipe is connected to the right side of the outer wall of the treatment box, and a discharge valve is fixedly connected to the outer wall of the discharge pipe.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the injection port connector is connected to the sample container. The sample enters the adsorption column after being filtered through layers of filter screen, filter plate, and filter cotton. At the same time, the carrier gas is introduced through the inlet pipe from the connector seat. The heater supplies power to the heating wire to heat the sample. Subsequently, the sample is evenly distributed through the flow equalization ring and split into the chromatograph through the split pipe. This effectively avoids injection port contamination and improves the problems of uneven sample vaporization and inaccurate split ratio caused by injection port contamination in the prior art, significantly improving the accuracy and repeatability of the analysis results.

[0023] 2. In this utility model, the waste gas enters the treatment box, and the heating lamp heats the activated carbon at the limiting ring to enhance its adsorption activity and purify the waste gas efficiently. After purification, the gas is discharged from the discharge pipe through the vent hole, meeting the environmental emission standards and reducing environmental pollution. At the same time, the fixing component makes it easy to open and close the sealing cover, and facilitates the replacement or maintenance of the activated carbon on the rack, improving the convenience and sustainability of the device. Attached Figure Description

[0024] Figure 1 This is a perspective view of a gas chromatography inlet anti-contamination splitting device proposed in this utility model;

[0025] Figure 2 This is a front view of a gas chromatography inlet anti-contamination splitting device proposed in this utility model;

[0026] Figure 3 This is a partial structural exploded view of a gas chromatography inlet anti-contamination splitting device proposed in this utility model;

[0027] Figure 4 This is a cross-sectional view of the housing of a gas chromatography inlet anti-contamination splitting device proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the heating wire of a gas chromatography inlet anti-contamination splitting device proposed in this utility model;

[0029] Figure 6 This is a schematic diagram of the quick-connect assembly of a gas chromatography inlet anti-contamination splitter device proposed in this utility model;

[0030] Figure 7 This is a schematic diagram of the waste gas treatment mechanism of a gas chromatography inlet anti-pollution diversion device proposed in this utility model;

[0031] Figure 8 This is a schematic diagram of the filtration mechanism of a gas chromatography inlet anti-contamination diversion device proposed in this utility model.

[0032] Legend:

[0033] 1. Housing; 2. Filtration mechanism; 201. Adsorption column; 202. Heating wire; 203. Sealed outer shell; 204. Heater; 205. Filter shell; 206. Filter cotton; 207. Filter plate; 208. Filter screen; 3. Waste gas treatment mechanism; 301. Treatment box; 302. Placement rack; 303. Vent hole; 304. Limiting ring; 305. Heating lamp; 306. Sealing cover; 307. Fixing assembly; 3071. Buckle; 3072. Hook; 4. Flow equalization 5. Ring; 6. Connecting pipe; 7. Threaded connector; 8. Inlet connector; 9. Flow split assembly; 10. Flow split pipe; 11. Control valve; 12. Check valve; 13. Carrier gas assembly; 14. Inlet pipe; 15. Exhaust pipe; 16. Connecting seat; 17. Quick-connect assembly; 18. Insert block; 19. Slot; 10. Reserved slot; 11. Spring; 12. Locking block; 13. Locking groove; 14. Sealing gasket; 15. Discharge pipe; 16. Discharge valve. Detailed Implementation

[0034] 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.

[0035] Reference Figure 3 , Figure 4 and Figure 8 This utility model provides an embodiment of a gas chromatograph injection port anti-contamination split device, comprising a housing 1, which serves as the main structure of the entire device, providing installation space and support for the internal components. A filter mechanism 2 is provided at the top of the housing 1 for filtering and pre-treating the sample entering the device, removing impurities and interfering substances to ensure the accuracy of subsequent analysis. An injection port connector 7 is provided at the top of the filter mechanism 2. A waste gas treatment mechanism 3 is provided on the right side of the outer wall of the housing 1 for treating the waste gas generated during the analysis process to meet environmental emission standards and reduce environmental pollution. A flow equalization ring 4 is fixedly connected to the top of the inner wall of the housing 1, ensuring that the filtered and pre-treated sample is evenly distributed before entering the connecting tube 5, guaranteeing consistency of the sample during subsequent splitting and analysis. The bottom of the flow equalization ring 4 is connected to the connecting tube 5, guiding the evenly distributed sample within the flow equalization ring 4 to the threaded connector 6 and providing an installation position for the split assembly 8. The bottom of the connecting tube 5 is connected to a threaded connector 6. A flow splitter 8 is installed on the outer wall of the connecting tube 5 to split the sample according to analytical requirements, introducing a portion of the sample into the chromatographic column for analysis, while the other portion is processed or discharged. A carrier gas assembly 9 is installed on the outer wall of the equalizing ring 4 to provide carrier gas into the device. After mixing with the sample, the carrier gas helps the sample transport within the device and enter the chromatographic column for separation and analysis. A quick-connect assembly 10 is installed at the bottom of the injection port connector 7 to allow for quick connection and disconnection between the injection port connector 7 and the top of the filter mechanism 2, facilitating the replacement or maintenance of related components when needed.

[0036] The filtration mechanism 2 includes an adsorption column 201, used to adsorb the sample after preliminary filtration, further removing impurities and interfering substances from the sample and improving sample purity. The bottom thread of the adsorption column 201 is located at the top center of the housing 1, fixing the adsorption column 201 to the housing 1 via a threaded connection, ensuring the stability of the adsorption column 201 during operation. A heating wire 202 is fixedly connected to the outer wall of the adsorption column 201 for heating the adsorption column 201, allowing the sample inside the adsorption column 201 to be adsorbed at a suitable temperature, improving adsorption efficiency. A sealing shell 203 is fixedly connected to the outer wall of the adsorption column 201 to enclose the heating wire 202 and the adsorption column 201, preventing heat loss and protecting internal components from external environmental influences. A heater 204 is fixedly connected to the left side of the outer wall of the sealing shell 203, providing electrical energy to the heating wire 202 and controlling the heating temperature of the heating wire 202 to meet the processing requirements of different samples. A filter shell 205 is fixedly connected to the top of the adsorption column 201 to house filter components such as filter cotton 206, filter plate 207, and filter screen 208, performing preliminary filtration of the sample and intercepting larger particulate impurities. Filter cotton 206 is fixedly connected to the bottom inner wall of the filter shell 205 to adsorb small particles and liquid impurities in the sample, further purifying the sample. A filter plate 207 is fixedly connected to the middle inner wall of the filter shell 205 to block larger particulate impurities in the sample, preventing them from entering the adsorption column 201 and protecting the column. A filter screen 208 is fixedly connected to the middle inner wall of the filter shell 205 for preliminary filtration of particulate impurities in the sample, allowing the sample to undergo preliminary screening before entering the filter cotton 206 and filter plate 207. The top of the filter shell 205 is attached to the bottom of the filter plate 207.

[0037] Specifically, in this gas chromatograph injection port anti-contamination split device, the injection port connector 7 is used to connect the sample container, allowing the sample to enter the device. The sample first enters the filter shell 205, where the filter screen 208, filter plate 207, and filter cotton 206 sequentially filter the sample, intercepting impurities of different sizes to prevent contamination of subsequent components. The filtered sample enters the adsorption column 201, and the heater 204 supplies power to the heating wire 202. The heating wire 202 generates heat, which is transferred to the adsorption column 201 for further processing of the sample. The adsorption column 201 is connected to the top center of the shell 1 via threads, and the sealing shell 203 encloses the adsorption column 201, providing protection and auxiliary heating. The flow equalization ring 4 is fixed to the top of the inner wall of the shell 1 to ensure uniform distribution of the processed sample. The connecting pipe 5 connects the flow equalization ring 4 to the threaded connector 6, which is used to connect the chromatograph. The split assembly 8 is located on the outer wall of the connecting pipe 5 to split the sample. The carrier gas assembly 9 is located on the outer wall of the flow equalization ring 4 to provide carrier gas. The quick-connect component 10 is located at the bottom of the inlet connector 7, which facilitates quick connection of related components.

[0038] Reference Figure 1, Figure 2 and Figure 7 The waste gas treatment mechanism 3 includes a treatment box 301, which serves as the main space for waste gas treatment, accommodating various components required for the treatment process and providing a location for waste gas treatment. The left side of the outer wall of the treatment box 301 is fixedly connected to the right side of the outer wall of the housing 1, connecting the waste gas treatment mechanism 3 to the housing 1 of the main body of the device, allowing waste gas discharged from the housing 1 to smoothly enter the treatment box 301 for treatment. A placement rack 302 is fixedly connected to the middle of the inner wall of the treatment box 301 for placing the materials required for waste gas treatment. Multiple ventilation holes 303 are provided on the top of the placement rack 302, allowing the treated waste gas to pass through the placement rack 302 for further discharge or subsequent treatment. A limit ring 304 is fixedly connected to the top of the treatment box 301 to restrict the position of the materials placed thereon, preventing them from moving freely within the treatment box 301 and ensuring the stability of the waste gas treatment process. Heating lamps 305 are fixedly connected to the left and right sides of the inner wall of the processing box 301 for heating the material inside the processing box 301. A sealing cover 306 is rotatably connected to the top of the processing box 301 to seal the top of the processing box 301 and prevent exhaust gas leakage. At the same time, when it is necessary to operate inside the processing box 301, the sealing cover 306 can be opened by rotating it. A fixing component 307 is provided on the right side of the outer wall of the sealing cover 306 to firmly fix the sealing cover 306 to the processing box 301 to ensure the sealing effect. The fixing component 307 includes two latches 3071, which are used to cooperate with hooks 3072 to fix the sealing cover 306. The outer left side of the two latches 3071 is fixedly connected to the outer right side of the sealing cover 306. The outer right side of the treatment box 301 is fixedly connected to the hook 3072. The two hooks 3072 are respectively engaged with the corresponding latches 3071. This engagement method can ensure that the sealing cover 306 and the treatment box 301 are tightly connected, preventing exhaust gas from leaking from the connection between the two.

[0039] Specifically, the rack 302 in the middle of the inner wall of the treatment box 301 is used to hold activated carbon, providing a foundation for waste gas purification. Multiple ventilation holes 303 on the top of the rack 302 allow the gas purified by the activated carbon to pass through and enter the bottom of the treatment box 301 for discharge. The limiting ring 304 on the top of the treatment box 301 limits the activated carbon placed on it, preventing it from moving freely within the treatment box 301 and ensuring its effective purification of waste gas. Heating lamps 305 fixed to the left and right sides of the inner wall of the treatment box 301 are activated during waste gas treatment to heat the activated carbon in the middle of the limiting ring 304. Appropriate heating can enhance the activity of the activated carbon, strengthen its adsorption capacity for harmful substances in the waste gas, and improve the purification effect. The sealing cover 306, rotatably connected to the top of the treatment box 301, can be opened when necessary to operate inside the treatment box 301, such as to replace the activated carbon, and closed after the operation is completed, ensuring the airtightness of the internal space of the treatment box 301 and allowing waste gas treatment to be carried out in a relatively closed environment. The fixing component 307, located on the right side of the outer wall of the sealing cover 306, consists of two latches 3071 and two hooks 3072. The two latches 3071 are fixed to the left side of the outer wall of the sealing cover 306, and the hooks 3072 are fixed to the right side of the outer wall of the treatment box 301. The latches 3071 and the hooks 3072 engage to firmly fix the sealing cover 306 to the top of the treatment box 301, preventing exhaust gas leakage. At the same time, it facilitates the opening and closing of the sealing cover 306, making it convenient for maintenance and operation inside the treatment box 301.

[0040] Reference Figure 4 , Figure 5 and Figure 6 The flow splitting assembly 8 includes a flow splitting tube 801, which is used to draw out the sample in the connecting tube 5 and perform a flow splitting operation. The left end of the flow splitting tube 801 is connected to the right side of the outer wall of the connecting tube 5, and the left side of the outer wall of the connecting tube 5 is connected to a control valve 802, which is used to control the flow rate and direction of the sample in the connecting tube 5, thereby realizing the adjustment of the flow splitting ratio. A one-way valve 803 is fixedly connected to the right side of the outer wall of the split tube 801 to ensure that the sample after splitting can only flow in one direction, prevent sample backflow, and ensure the stability and accuracy of the splitting process; the carrier gas assembly 9 includes an inlet pipe 901, which is responsible for introducing the carrier gas into the device. The bottom end of the inlet pipe 901 is connected to the front side of the outer wall of the flow equalization ring 4, and the top end of the inlet pipe 901 is connected to the front side of the outer wall of the sealing shell 203. An exhaust pipe 902 is connected to the right side of the outer wall of the adsorption column 201. The bottom end of the exhaust pipe 902 is connected to the split tube 801. A connecting seat 903 is connected to the front side of the outer wall of the inlet pipe 901 for connecting to an external carrier gas source, providing an access point for the entire carrier gas supply system, and ensuring that the carrier gas can be stably input.

[0041] Specifically, in the split assembly 8, the left end of the split tube 801 is connected to the right side of the outer wall of the connecting tube 5, responsible for drawing out the sample in the connecting tube 5 for splitting. The control valve 802 connected to the left side of the outer wall of the connecting tube 5 can control the flow rate and direction of the sample in the connecting tube 5, thereby adjusting the split ratio to meet different analytical needs. The one-way valve 803 fixed to the right side of the outer wall of the split tube 801 ensures that the split sample can only flow in the set direction, preventing sample backflow and ensuring the stability and accuracy of the splitting process. The bottom end of the inlet tube 901 is connected to the front side of the outer wall of the flow equalization ring 4, and the top end is connected to the front side of the outer wall of the sealing shell 203. Its function is to introduce carrier gas into the device. The carrier gas first reaches the sealing shell 203 through the inlet tube 901, and works in conjunction with the heating wire 202 to assist in heating the sample in the adsorption column 201. Then the carrier gas enters the flow equalization ring 4 and mixes evenly with the treated sample. The bottom end of the exhaust pipe 902, connected to the right side of the outer wall of the adsorption column 201, is connected to the split pipe 801, allowing the carrier gas, after sample processing within the adsorption column 201, to enter the split pipe 801 and flow together with the split sample, further ensuring the stability of the sample during the splitting process. The connector 903, connected to the front side of the outer wall of the inlet pipe 901, is used to connect to an external carrier gas source, providing an access point for the entire carrier gas supply system and ensuring a stable input of carrier gas.

[0042] Reference Figure 1 , Figure 3 and Figure 8The quick-connect assembly 10 includes two inserts 1001, which are key components of the quick-connect assembly 10 and are used to achieve a quick connection between the inlet connector 7 and the filter housing 205. The top ends of the two inserts 1001 are fixedly connected to the front and rear sides of the bottom of the inlet connector 7, respectively. The front and rear sides of the top of the filter housing 205 are provided with slots 1002 for engaging with the inserts 1001, providing space for the inserts 1001 to be inserted, thereby achieving the initial positioning and connection between the inlet connector 7 and the filter housing 205. The two inserts 1001 are slidably connected to the corresponding slots 1002, so that the inlet connector 7 can be inserted and pulled out relative to the filter housing 205, facilitating quick and easy connection and separation. The outer walls of the two inserts 1001 are provided with reserved grooves 1003 on the opposite sides to accommodate the spring 1004 and the locking block 1005, providing them with installation space. Springs 1004 are fixedly connected to the inner walls of both reserved slots 1003 to provide elasticity, allowing the locking block 1005 to remain extended when no external force is applied, thus ensuring the fastening of the sample inlet connector 7 to the filter shell 205 after connection. Locking blocks 1005 are fixedly connected to the opposite end of each spring 1004. Under the action of the springs 1004, these blocks engage with the locking grooves 1006 on the filter shell 205, further securing the connection between the sample inlet connector 7 and the filter shell 205 and preventing accidental separation. Two locking blocks 1005 are slidably connected to corresponding reserved slots 1003, allowing the locking blocks 1005 to retract into the reserved slots 1003 when subjected to external force, facilitating the separation of the sample inlet connector 7 from the filter shell 205. The outer wall of the filter shell 205 has locking slots 1006 on both the front and rear sides. These slots 1006 engage with the locking blocks 1005, providing a locking position and enhancing the stability of the connection between the sample inlet connector 7 and the filter shell 205. The two locking blocks 1005 engage with their corresponding slots 1006, achieving a secure connection between the sample inlet connector 7 and the filter shell 205, ensuring no loosening occurs during device operation. A sealing gasket 11 is fixedly connected to the top of the filter shell 205 to enhance the sealing of the connection between the sample inlet connector 7 and the filter shell 205, preventing sample leakage at the connection point. The bottom ends of the two locking blocks 1005 respectively penetrate the sealing gaskets 11, ensuring that the locking blocks 1005 can smoothly engage with the locking slots 1006 without affecting the sealing effect of the sealing gaskets 11; the right side of the outer wall of the treatment box 301 is connected to a discharge pipe 12, which is used to discharge the treated waste gas in the treatment box 301 to a designated external location. A discharge valve 13 is fixedly connected to the outer wall of the discharge pipe 12, which is used to control the discharge of waste gas in the discharge pipe 12. The discharge channel can be opened or closed as needed, and the discharge speed of the waste gas can be adjusted.

[0043] Specifically, the quick-connect assembly 10 enables rapid connection and secure fixation between the inlet connector 7 and the filter housing 205. Two insert blocks 1001 are fixed at their top ends to the front and rear sides of the bottom of the inlet connector 7, and slide in connection with the slots 1002 on the front and rear sides of the top of the filter housing 205, initially positioning them. A spring 1004 is fixed at one end in a pre-drilled groove 1003 on the outer wall of the insert block 1001, and the other end is connected to a locking block 1005, which can slide within the groove 1003. When the insert block 1001 is inserted into the slot 1002, the locking block 1005 pops out under the elastic force of the spring 1004, engaging with the slot 1006 on the outer wall of the filter housing 205, ensuring a secure connection between the inlet connector 7 and the filter housing 205 and preventing sample leakage. A sealing gasket 11 is fixed to the top of the filter housing 205, and the bottom end of the locking block 1005 passes through the sealing gasket 11, further enhancing the sealing of the connection. In terms of waste gas treatment, the right side of the outer wall of the treatment box 301 is connected to the discharge pipe 12. The discharge valve 13 on the outer wall of the discharge pipe 12 is used to control the discharge of purified waste gas. It can be opened or closed according to actual needs to achieve effective management of waste gas discharge.

[0044] Working Principle: In use, connect the housing 1 to the gas chromatograph inlet and simultaneously connect the inlet connector 7 to the sample container outlet to establish a channel for sample entry into the device. Then, inject the sample to be tested into the inlet connector 7, which passes through the filter screen 208, filter plate 207, and filter cotton 206. The filter screen 208 intercepts larger particulate impurities, the filter plate 207 further filters smaller particles, and the filter cotton 206 adsorbs fine impurities. This layer-by-layer filtration effectively removes various impurities from the sample, preventing them from entering subsequent components and contaminating the inlet. The filtered sample enters the adsorption column 201. Simultaneously, connect the connector 903 to an external carrier gas cylinder, and introduce carrier gas through the inlet pipe 901. The carrier gas plays a role in carrying the sample and assisting in sample transport throughout the process. Then, start the heater 204, which supplies power to the heating wire 202 located in the cavity between the adsorption column 201 and the sealed housing 203. Due to its unique location, the heat generated by the heating wire 202 can be efficiently transferred to the adsorption column 201, heating the filtered sample. Heating brings the sample to a suitable state, facilitating subsequent splitting and analysis. The heated sample then enters the equalization ring 4. The function of the equalization ring 4 is to ensure uniform sample distribution and consistent sample properties across all portions. The sample is split through the splitter tube 801 on the connecting tube 5. The splitting process precisely delivers a portion of the sample to the chromatograph for analysis according to a preset ratio. Through effective filtration and heating of the sample in the pre-processing stage, problems such as uneven sample vaporization and inaccurate splitting ratios caused by inlet contamination are avoided, greatly improving the accuracy and repeatability of the analytical results.

[0045] When the gas chromatograph is running and waste gas is generated and requires treatment, the waste gas enters the treatment chamber 301 through the channel connected to the housing 1. The treatment chamber 301 serves as the main space for waste gas treatment, and its internal rack 302 plays a crucial role, holding activated carbon. Activated carbon has strong adsorption properties and can effectively adsorb harmful substances in the waste gas. To improve the adsorption efficiency of the activated carbon, heating lamps 305 on the left and right sides of the inner wall of the treatment chamber 301 are activated. The heat generated by the heating lamps 305 heats the activated carbon in the middle of the limiting ring 304. At a suitable temperature, the adsorption activity of the activated carbon is enhanced, enabling more efficient purification of the exhaust gas entering the treatment chamber 301, adsorbing harmful substances such as organic pollutants in the waste gas. The gas purified by the activated carbon passes through multiple vent holes 303 opened at the top of the rack 302 and enters the bottom of the treatment chamber 301. This purified gas is finally discharged through the discharge pipe 12, thus meeting environmental emission standards and reducing environmental pollution. When the device is no longer in use or the activated carbon needs to be replaced, the fixing component 307 can be operated. Open the two latches 3071 on the right side of the outer wall of the sealing cover 306 to separate them from the hooks 3072 on the right side of the outer wall of the treatment box 301. Then rotate the sealing cover 306 to open the treatment box 301, making it convenient to replace or maintain the activated carbon on the placement rack 302.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 gas chromatography inlet anti-pollution split device comprising a housing (1), characterized in that: A filter mechanism (2) is provided on the top of the housing (1), and an inlet connector (7) is provided on the top of the filter mechanism (2). A waste gas treatment mechanism (3) is provided on the right side of the outer wall of the housing (1). A flow equalization ring (4) is fixedly connected to the top of the inner wall of the housing (1). A connecting pipe (5) is connected to the bottom of the flow equalization ring (4). A threaded connector (6) is connected to the bottom of the connecting pipe (5). A flow splitting component (8) is provided on the outer wall of the connecting pipe (5). A carrier gas component (9) is provided on the outer wall of the flow equalization ring (4). A quick-connect component (10) is provided at the bottom of the inlet connector (7). The filtration mechanism (2) includes an adsorption column (201), the bottom of which is threaded to the top center of the housing (1). A heating wire (202) is fixedly connected to the outer wall of the adsorption column (201). A sealing shell (203) is fixedly connected to the outer wall of the adsorption column (201). A heater (204) is fixedly connected to the left side of the outer wall of the sealing shell (203). A filter shell (205) is fixedly connected to the top of the adsorption column (201). A filter cotton (206) is fixedly connected to the bottom of the inner wall of the filter shell (205). A filter plate (207) is fixedly connected to the middle of the inner wall of the filter shell (205). A filter screen (208) is fixedly connected to the middle of the inner wall of the filter shell (205). The top of the filter shell (205) is attached to the bottom of the filter plate (207).

2. The anti-pollution split flow device for gas chromatography inlet according to claim 1, characterized in that: The exhaust gas treatment mechanism (3) includes a treatment box (301). The outer left side of the treatment box (301) is fixedly connected to the outer right side of the housing (1). A placement rack (302) is fixedly connected to the middle of the inner wall of the treatment box (301). Multiple ventilation holes (303) are opened on the top of the placement rack (302). A limit ring (304) is fixedly connected to the top of the treatment box (301). Heating lamps (305) are fixedly connected to both the left and right sides of the inner wall of the treatment box (301). A sealing cover (306) is rotatably connected to the top of the treatment box (301). A fixing component (307) is provided on the right side of the outer wall of the sealing cover (306).

3. The anti-pollution split flow device for gas chromatography inlet according to claim 2, characterized in that: The fixing component (307) includes two buckles (3071), the outer left side of the two buckles (3071) is fixedly connected to the outer right side of the sealing cover (306), and the outer right side of the processing box (301) is fixedly connected to a hook (3072), and the two hooks (3072) are respectively engaged with the corresponding buckles (3071).

4. The gas chromatograph inlet anti-contamination splitting device according to claim 1, characterized in that: The diversion assembly (8) includes a diversion pipe (801), the left end of which is connected to the right side of the outer wall of the connecting pipe (5), and a control valve (802) is connected to the left side of the outer wall of the connecting pipe (5). A one-way valve (803) is fixedly connected to the right side of the outer wall of the diversion pipe (801).

5. The anti-pollution split flow device for gas chromatography inlet according to claim 4, characterized in that: The carrier gas assembly (9) includes an air inlet pipe (901), the bottom end of which is connected to the front side of the outer wall of the flow equalization ring (4), the top end of which is connected to the front side of the outer wall of the sealing shell (203), an exhaust pipe (902) is connected to the right side of the outer wall of the adsorption column (201), the bottom end of which is connected to the diversion pipe (801), and a connecting seat (903) is connected to the front side of the outer wall of the air inlet pipe (901).

6. The anti-pollution split flow device for gas chromatography inlet according to claim 1, characterized in that: The quick-connect assembly (10) includes two inserts (1001). The top ends of the two inserts (1001) are fixedly connected to the bottom front and rear sides of the sample inlet connector (7). The top front and rear sides of the filter shell (205) are provided with slots (1002). The two inserts (1001) are slidably connected to the corresponding slots (1002). The outer walls of the two inserts (1001) are provided with reserved grooves (1003) on opposite sides. The inner walls of the two reserved grooves (1003) are fixedly connected with springs (1004). The opposite ends of the two springs (1004) are fixedly connected with locking blocks (1005). The two locking blocks (1005) are slidably connected to the corresponding reserved grooves (1003). The outer walls of the filter shell (205) are provided with slots (1006). The two locking blocks (1005) are engaged with the corresponding slots (1006).

7. A gas chromatography anti-pollution split flow device according to claim 6, characterized in that: A sealing gasket (11) is fixedly connected to the top of the filter housing (205), and the bottom ends of the two locking blocks (1005) pass through the sealing gasket (11).

8. The anti-pollution split flow device for gas chromatography inlet according to claim 2, characterized in that: The outer right side of the processing box (301) is connected to a discharge pipe (12), and a discharge valve (13) is fixedly connected to the outer wall of the discharge pipe (12).

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