Real-time gas mass spectrometry analysis device with multi-channel parallel injection

Abstract

This utility model discloses a real-time gas mass spectrometry analysis device with multi-channel parallel sample introduction, relating to the field of gas detection technology. The utility model includes a tubing, with a switching mechanism at one end and a gas delivery pipe at the other end. A filter mechanism is fixedly connected to the other end of the gas delivery pipe, and an instrument is fixedly connected to the other end of the filter mechanism. The switching mechanism of this utility model adopts a motor-driven mechanical switching structure, avoiding the problem of electromagnetic interference affecting solenoid valves, ensuring timely switching response, reducing delays caused by interference, and improving the timeliness of channel switching. Through the precise cooperation of the pins and grooved wheels and the limiting effect of the locking plate, transmission gaps are reduced, positioning errors are lowered, and the sealing failure problem caused by large gaps in ordinary mechanical switching valves is avoided. This effectively reduces cross-contamination, and the mechanical structure provides smooth transmission with minimal impact vibration during switching, reducing disturbance to the gas flow field and improving sample introduction stability.

Description

Technical Field

[0001] This invention belongs to the field of gas detection technology, and in particular relates to a real-time gas mass spectrometry analysis device with multi-channel parallel sample introduction. Background Technology

[0002] In the field of gas mass spectrometry, multichannel injection technology has become an important means to improve analytical efficiency and is widely used in many industries such as chemical engineering, environmental monitoring, and energy. For example, in chemical production, it is necessary to monitor multiple gases in the reaction process in real time in order to control the reaction process; in the field of environmental monitoring, it is also necessary to analyze multiple pollutants in the atmosphere simultaneously.

[0003] The performance of the channel switching mechanism and the purity of the gas sample directly affect the stability and accuracy of the overall device. However, existing technologies mostly use solenoid valves or ordinary mechanical switching valves to achieve channel switching, which has the following shortcomings: Solenoid valves are susceptible to electromagnetic interference during switching, resulting in delayed switching response and insufficient positioning accuracy; Ordinary mechanical switching valves are prone to sealing failure after long-term high-frequency switching due to large transmission gaps, leading to cross-contamination. In addition, gas samples often contain impurities such as particulate matter, water vapor, and oil. If they are not effectively filtered, they will contaminate subsequent analysis modules, affecting detection accuracy and equipment lifespan.

[0004] To address these issues, we have developed a real-time gas mass spectrometry analysis device with multi-channel parallel injection to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide a real-time gas mass spectrometry analysis device with multi-channel parallel sample introduction. By cooperating with the switching mechanism and the filtering mechanism, it solves the problems of delayed response and insufficient positioning accuracy of the solenoid valve and the lack of a reliable filtering mechanism in the existing multi-channel parallel sample introduction real-time gas mass spectrometry analysis devices.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a real-time gas mass spectrometry analysis device with multi-channel parallel sample introduction, comprising a tubing. A switching mechanism is provided at one end of the tubing, and a gas delivery tube is provided at the other end of the switching mechanism. A filter mechanism is fixedly connected to the other end of the gas delivery tube, and an instrument is fixedly connected to the other end of the filter mechanism. The switching mechanism includes a motor, one side of which is fixedly connected to the instrument. A turntable is fixedly connected to the motor output end. Pins are fixedly connected to both sides of the turntable. A locking plate is provided on one side of each pin, and a grooved wheel is slidably connected to one side of the locking plate. A switching plate is fixedly connected to one side of the grooved wheel. The switching plate is connected to... The instrument is slidably connected, with the other side of the switching plate fitting against the tubing. There are four tubing and four gas delivery tubes, allowing simultaneous connection to four gas sources to be detected, meeting the basic hardware requirements for parallel analysis of multiple samples. The other ends of the four gas delivery tubes are connected to a parallel block, enabling the four gas delivery tubes to share a single filtration mechanism. This eliminates the need for a separate filtration component for each channel, simplifying the overall structure, reducing the space occupied by the device, and improving space utilization. A through hole is provided on one side of the switching plate to ensure that the gas in the corresponding tubing can pass through smoothly. A grooved wheel can limit the switching plate after it reaches a designated position, preventing the switching plate from rotating due to shaking.

[0008] The present invention is further configured such that the filtration mechanism includes a parallel block, the top of which is fixedly connected to the gas supply pipe, a connecting plate is slidably connected to one side of the parallel block, a filter plate is detachably connected to one side of the connecting plate, the top of the filter plate is slidably connected to the parallel block, an adsorption plate is provided on one side of the filter plate, the top of the adsorption plate is slidably connected to the parallel block, the front side of the adsorption plate is detachably connected to the connecting plate, a separation plate is provided on one side of the adsorption plate, the top of the separation plate is slidably connected to the parallel block, and the front side of the separation plate is detachably connected to the connecting plate. The filter plate is composed of a stainless steel shell and multiple layers of filter screens of different materials. From the air inlet to the air outlet, the filter screens are metal wire mesh, glass fiber filter, and polypropylene filter with different pore sizes. The multiple layers of filter screens work together to effectively intercept particulate impurities in the gas. The adsorption plate uses a cylindrical activated carbon adsorption column, which has a strong adsorption capacity for organic vapors and odors in the gas. The core of the separation plate is a polytetrafluoroethylene hollow fiber membrane, which has good air permeability and corrosion resistance.

[0009] The present invention is further configured such that a fixed frame is fixedly connected to one side of the instrument, the bottom of the fixed frame is fixedly connected to the motor, one side of the top of the fixed frame is fixedly connected to the pipe, the other side of the top of the fixed frame is fixedly connected to the gas supply pipe, and the other side of the fixed frame is rotatably connected to the switching plate. The fixed frame integrates and connects the instrument, motor, pipe, gas supply pipe and switching plate to form a unified force-bearing whole.

[0010] The present invention is further configured such that positioning blocks are fixedly connected to both sides of the connecting plate, and the other side of the positioning block is slidably connected to the parallel block. The positioning block provides guidance for the installation of the connecting plate, so that the filter plate, adsorption plate and separation plate can be quickly and accurately aligned with the parallel block, reducing assembly errors.

[0011] The present invention is further configured such that a limiting groove is provided in the inner cavity of the fixing frame, a limiting rod is slidably connected to the inner cavity of the limiting groove, and the other side of the limiting rod is fixedly connected to the switching plate. The setting of the limiting groove and the limiting rod can restrict the movement mode of the switching plate.

[0012] The present invention is further provided that a sealing gasket is provided on one side of the switching plate, and one side of the sealing gasket is fixedly connected to the gas supply pipe. The sealing gasket can fill the gap between the switching plate and the gas supply pipe through its own deformation.

[0013] The present invention is further configured such that a sliding groove is provided in the inner cavity of the parallel block, and the inner cavity of the sliding groove is slidably connected to the separation plate. The sliding groove allows the separation plate to be completely pulled out from the inner cavity of the parallel block, so that it can be replaced by the staff.

[0014] The present invention is further provided that the inner cavity of the slide groove is provided with a friction pad, one side of which is fixedly connected to the connecting block. The friction pad can increase the friction between the separating plate and the connecting block, and prevent the separating plate from being displaced due to shaking.

[0015] The present invention has the following beneficial effects.

[0016] 1. The switching mechanism of this utility model adopts a motor-driven mechanical switching structure, which avoids the problem of electromagnetic interference that electromagnetic valves are susceptible to, ensures timely switching response, reduces delays caused by interference, and improves the timeliness of channel switching. Through the precise cooperation of the pin and groove wheel and the limiting effect of the locking plate, the transmission gap is reduced, the positioning error is reduced, and the sealing failure problem caused by the large gap of ordinary mechanical switching valves is avoided. It effectively reduces cross-contamination, and the mechanical structure transmission is smooth with little impact vibration during switching, which can reduce the disturbance to the gas flow field and improve the stability of sample injection.

[0017] 2. In the filtration mechanism of this utility model, the filter plate can intercept particulate impurities, the adsorption plate can adsorb water vapor, volatile organic compounds, etc., and the separation plate can separate small molecule impurities such as oil. The three work together to comprehensively remove various impurities in the gas, avoiding contamination of subsequent analysis modules by impurities. The filter plate, adsorption plate, and separation plate are detachably connected to the connecting plate and slide with the parallel block, which facilitates quick replacement, ensures stable filtration effect, and reduces the impact of filter component failure on detection accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional view of a real-time gas mass spectrometry analysis device with multi-channel parallel sample introduction.

[0020] Figure 2 A three-dimensional view of the switching mechanism in a real-time gas mass spectrometry analyzer with multi-channel parallel sample introduction.

[0021] Figure 3 This is a three-dimensional view of the filtration mechanism in a real-time gas mass spectrometry analyzer with multi-channel parallel injection.

[0022] Figure 4 This is a magnified view of point A in a real-time gas mass spectrometry analyzer with multi-channel parallel injection.

[0023] Figure 5 This is a magnified view of point B in a real-time gas mass spectrometry analyzer with multi-channel parallel injection.

[0024] In the attached diagram: 1. Pipe fitting; 2. Switching mechanism; 201. Motor; 202. Turntable; 203. Pulley; 204. Locking plate; 205. Grooved wheel; 206. Switching plate; 3. Gas supply pipe; 4. Filtration mechanism; 401. Connecting block; 402. Connecting plate; 403. Filter plate; 404. Adsorption plate; 405. Separation plate; 5. Instrument; 6. Fixing frame; 7. Positioning block; 8. Limiting groove; 9. Limiting rod; 10. Sealing gasket; 11. Slide groove; 12. Friction pad. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Please see Figure 1-5 This utility model is a real-time gas mass spectrometry analysis device with multi-channel parallel sample introduction, including a tube 1. One end of the tube 1 is provided with a switching mechanism 2, and the other side of the switching mechanism 2 is provided with a gas supply pipe 3. The other end of the gas supply pipe 3 is fixedly connected to a filter mechanism 4, and the other side of the filter mechanism 4 is fixedly connected to an instrument 5. The switching mechanism 2 includes a motor 201. One side of the motor 201 is fixedly connected to the instrument 5, and the output end of the motor 201 is fixedly connected to a turntable 202. Both sides of the turntable 202 are fixedly connected with pins 203. One side of the pins 203 is provided with a locking plate 204. One side of the locking plate 204 is slidably connected to a grooved wheel 205. One side of the grooved wheel 205 is fixedly connected to a switching plate 206. One side of the switching plate 206 is slidably connected to the instrument 5, and the other side of the switching plate 206 is in contact with the tube 1.

[0028] Specifically: There are four pipe fittings 1 and four gas supply pipes 3, which can be connected to four gas sources to be tested at the same time, meeting the basic hardware requirements for parallel analysis of multiple samples. The other end of the four gas supply pipes 3 are connected to the parallel block 401, so that the four gas supply pipes 3 share a filter mechanism 4. There is no need to configure a filter component for each channel separately, which simplifies the overall structure, reduces the space occupied by the device, and improves the space utilization rate. A through hole is opened on one side of the switching plate 206 to ensure that the gas in the corresponding pipe fitting 1 can pass smoothly. The groove wheel 205 can limit the switching plate 206 after it reaches the designated position to prevent the switching plate 206 from rotating due to shaking.

[0029] Example 2

[0030] Please see Figure 1-5 Based on Embodiment 1, the filtration mechanism 4 includes a parallel block 401, the top of which is fixedly connected to the air supply pipe 3. A connecting plate 402 is slidably connected to one side of the parallel block 401. A filter plate 403 is detachably connected to one side of the connecting plate 402. The top of the filter plate 403 is slidably connected to the parallel block 401. An adsorption plate 404 is provided on one side of the filter plate 403. The top of the adsorption plate 404 is slidably connected to the parallel block 401. The front side of the adsorption plate 404 is detachably connected to the connecting plate 402. A separation plate 405 is provided on one side of the adsorption plate 404. The top of the separation plate 405 is slidably connected to the parallel block 401. The front side of the separation plate 405 is detachably connected to the connecting plate 402. A fixing frame 6 is fixedly connected to one side of the instrument 5. The bottom of the fixing frame 6 is fixedly connected to the motor 201. The top side of the fixed frame 6 is fixedly connected to the pipe fitting 1, and the other side of the top of the fixed frame 6 is fixedly connected to the gas supply pipe 3. The other side of the fixed frame 6 is rotatably connected to the switching plate 206. Positioning blocks 7 are fixedly connected to both sides of the connecting plate 402. The other side of the positioning blocks 7 is slidably connected to the parallel block 401. The inner cavity of the fixed frame 6 is provided with a limiting groove 8. The inner cavity of the limiting groove 8 is slidably connected to a limiting rod 9. The other side of the limiting rod 9 is fixedly connected to the switching plate 206. A sealing gasket 10 is provided on one side of the switching plate 206. The sealing gasket 10 is fixedly connected to the gas supply pipe 3 on one side. The inner cavity of the parallel block 401 is provided with a sliding groove 11. The inner cavity of the sliding groove 11 is slidably connected to the separation plate 405. A friction pad 12 is provided in the inner cavity of the sliding groove 11. The friction pad 12 is fixedly connected to the parallel block 401 on one side.

[0031] Specifically: Filter plate 403 consists of a stainless steel shell and multiple layers of filter screens made of different materials. From the inlet to the outlet, the layers are metal wire mesh, glass fiber filter, and polypropylene filter with different pore sizes. The multiple layers of filter screens work together to effectively intercept particulate impurities in the gas. Adsorption plate 404 uses a cylindrical activated carbon adsorption column, which has a strong adsorption capacity for organic vapors and odors in the gas. The core of separation plate 405 is a polytetrafluoroethylene hollow fiber membrane, which has good air permeability and corrosion resistance. Fixing frame 6 integrates and connects instrument 5, motor 201, fitting 1, gas supply pipe 3, and switching plate 206 to form a unified force-bearing whole. Positioning block 7 is a connecting... The installation of the connecting plate 402 provides guidance, enabling the filter plate 403, adsorption plate 404, and separation plate 405 to quickly and accurately align with the parallel block 401, reducing assembly errors. The setting of the limiting groove 8 and the limiting rod 9 can restrict the movement of the switching plate 206. The sealing gasket 10 can fill the gap between the switching plate 206 and the air supply pipe 3 through its own deformation. The setting of the sliding groove 11 allows the separation plate 405 to be completely pulled out from the inner cavity of the parallel block 401, so that it can be replaced by the staff. The friction pad 12 can increase the friction between the separation plate 405 and the parallel block 401, preventing the separation plate 405 from being displaced due to shaking.

[0032] The working principle of this utility model is as follows: The container of the gas to be tested is connected to the fitting 1. After starting the instrument 5, the gas enters the gas delivery pipe 3 through the fitting 1, and then enters the connecting block 401 through the gas delivery pipe 3. When passing through the filter plate 403, particulate impurities are intercepted by the filter plate 403. When passing through the adsorption plate 404, organic volatiles, water vapor, and other impurities are adsorbed. When passing through the separation plate 405, small molecule impurities such as oil stains are discharged through the membrane layer. The gas then enters the instrument 5 for detection. The gas is first initially drawn to a low vacuum state by a mechanical pump under the action of the vacuum system, and then further boosted to an extremely high vacuum degree close to vacuum by a molecular pump, reducing collisions between gas molecules and interference with subsequent ion movement. Subsequently, the gas enters the ionization chamber of the ion source. Electrons emitted by the filament collide with gas sample molecules under the acceleration of the electric field, causing the molecules to lose electrons and form positive ions. The generated ions enter the quadrupole. The mass analyzer uses four parallel cylindrical electrodes to create a specific electric field by applying DC and radio frequency voltages. Ions oscillate within this field, and only ions with a mass-to-charge ratio that meets the requirements can pass through stably, thus filtering ions of different masses. The filtered ions collide with the cathode of the detector, and the resulting secondary electrons multiply in the electric field to form an electrical signal. This signal is then received by the data processing module, converted into mass-to-charge ratio and ion intensity information, and presented as a mass spectrum to complete the gas analysis. When it is necessary to detect the gas in another pipe 1, the motor 201 starts and drives the turntable 202 to rotate. The turntable 202 drives the pin 203 to rotate the grooved wheel 205. The grooved wheel 205 drives the switching plate 206 to rotate. During the switching process, because the switching plate 206 has only one through hole, the gas in the other pipe 1 will not leak. When the locking plate 204 is in contact with the grooved wheel 205, the switching is complete.

[0033] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A multi-channel parallel inlet real-time gas mass spectrometer analysis device comprising a tube (1), characterised in that: One end of the fitting (1) is provided with a switching mechanism (2), and the other side of the switching mechanism (2) is provided with a gas supply pipe (3). The other end of the gas supply pipe (3) is fixedly connected to a filter mechanism (4), and the other side of the filter mechanism (4) is fixedly connected to an instrument (5). The switching mechanism (2) includes a motor (201), one side of which is fixedly connected to the instrument (5). A turntable (202) is fixedly connected to the output end of the motor (201). Pins (203) are fixedly connected to both sides of the turntable (202). A locking plate (204) is provided on one side of the pin (203). A grooved wheel (205) is slidably connected to one side of the locking plate (204). A switching plate (206) is fixedly connected to one side of the grooved wheel (205). One side of the switching plate (206) is slidably connected to the instrument (5), and the other side of the switching plate (206) is in contact with the pipe (1).

2. The real-time gas mass spectrometer analytical device of claim 1, wherein: The filtration mechanism (4) includes a parallel block (401), the top of which is fixedly connected to the air supply pipe (3). A connecting plate (402) is slidably connected to one side of the parallel block (401). A filter plate (403) is detachably connected to one side of the connecting plate (402). The top of the filter plate (403) is slidably connected to the parallel block (401). An adsorption plate (404) is provided on one side of the filter plate (403). The top of the adsorption plate (404) is slidably connected to the parallel block (401). The front side of the adsorption plate (404) is detachably connected to the connecting plate (402). A separation plate (405) is provided on one side of the adsorption plate (404). The top of the separation plate (405) is slidably connected to the parallel block (401). The front side of the separation plate (405) is detachably connected to the connecting plate (402).

3. The real-time gas mass spectrometer analytical device of claim 1, wherein: The instrument (5) is fixedly connected to a mounting bracket (6) on one side. The bottom of the mounting bracket (6) is fixedly connected to a motor (201). The top side of the mounting bracket (6) is fixedly connected to a pipe fitting (1). The other side of the top of the mounting bracket (6) is fixedly connected to a gas supply pipe (3). The other side of the mounting bracket (6) is rotatably connected to a switching plate (206).

4. The real-time gas mass spectrometer analytical device of claim 2, wherein: The connecting plate (402) is fixedly connected to both sides of the positioning block (7), and the other side of the positioning block (7) is slidably connected to the parallel block (401).

5. The real-time gas mass spectrometer analytical device of claim 3, wherein: The inner cavity of the fixed frame (6) has a limiting groove (8), and the inner cavity of the limiting groove (8) is slidably connected to a limiting rod (9). The other side of the limiting rod (9) is fixedly connected to the switching plate (206).

6. The real-time gas mass spectrometer analytical device of claim 1, wherein: A sealing gasket (10) is provided on one side of the switching plate (206), and one side of the sealing gasket (10) is fixedly connected to the gas supply pipe (3).

7. The real-time gas mass spectrometer analytical device of claim 2, wherein: The inner cavity of the connecting block (401) is provided with a sliding groove (11), and the inner cavity of the sliding groove (11) is slidably connected to the separation plate (405).

8. The real-time gas mass spectrometer analytical device of claim 7, wherein: The inner cavity of the slide groove (11) is provided with a friction pad (12), and one side of the friction pad (12) is fixedly connected to the connecting block (401).

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