Mass spectrometer and gas sampling device thereof

Abstract

The invention discloses a mass spectrometer and a gas sampling device thereof, and relates to the technical field of detection and sampling equipment.The mass spectrometer, a filter and a gas storage tank are included, a suction cylinder is fixedly connected to the interior of a placement box, a pull rod is slidably connected to the interior of the suction cylinder, a threaded groove is integrally formed in the exterior of the pull rod, and the threaded groove is internally provided with a threaded hole; a piston is rotatably connected to one end of the drawing rod, a quantitative structure is connected to the outer portion of the containing box, a movable rod is pushed to drive a threaded plate to be attached to the drawing rod, threaded connection is formed between the drawing rod and the threaded plate through the attachment between the threaded plate and the drawing rod, and under the condition that threaded connection is formed, the quantitative structure is fixed to the outer portion of the containing box. A worker can continuously rotate the drawing rod, and the position of the drawing rod is gradually adjusted through threaded connection of the drawing rod and the threaded plate, so that quantitative and small-dose supplementary sampling can be performed according to threads during sampling.

Description

Technical Field

[0001] The present invention relates to the technical field of detection sampling equipment, and in particular, to a mass spectrometer and its gas sampling device. Background Technique

[0002] As a high-precision analytical instrument, since its birth in the early 20th century, the mass spectrometer has played an important role in many fields such as chemistry, physics, biomedicine, environmental science, and materials science. Its basic principle is to ionize the sample and separate and detect it according to the mass-to-charge ratio (m / z) of the ions, so as to obtain the mass spectrum of the sample, and then qualitatively and quantitatively analyze the chemical composition and structure of the sample.

[0003] In the application of the mass spectrometer, the gas sampling device is a crucial component. The main function of the gas sampling device is to accurately and stably collect gas samples from the environment to be measured and introduce them into the mass spectrometer for analysis. Due to the characteristics of gas samples and different analysis requirements, the design of gas sampling devices also shows diversification.

[0004] In the patent with the title: A Gas Sampling Device of a Mass Spectrometer, and the publication number: CN118225520B, it is proposed that in the prior art, the push rod is pulled upward by a pneumatic component. Since it is when sampling gas, it is very difficult for the pneumatic component to accurately perform quantitative sampling of the extracted gas, and it is impossible to more intuitively observe the amount of the sample in the cartridge, so there will be a phenomenon of excessive or insufficient sampling, which is likely to affect the later detection effect. When quantitatively extracting gas through the sampling tube, the adjustment column is toggled, and then the collar will rotate. The rotation of the collar facilitates the movement of the locking block into the internal card slot of the card slot for fixing, and then the turntable on the threaded rod is rotated. The rotation of the turntable moves the control ring. The movement of the control ring drives the rotating ring to move through the docking plate, so as to facilitate the collar to pull the pull rod. This operation method directly replaces the manual direct extraction method and can quantitatively extract gas, but when performing quantitative extraction, it still uses an external threaded rod for adjustment. In the case of using an external threaded rod for adjustment, components such as the collar still need to be adjusted. And when accurately adjusting with the threaded rod, if the threaded rod is rotated too much, it will still cause the phenomenon of excessive extraction amount. Therefore, a mass spectrometer and its gas sampling device are proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a mass spectrometer and its gas sampling device to solve the problems raised in the above background technique.

[0006] To achieve the above object, the present invention provides the following technical solution: A mass spectrometer, comprising a mass spectrometer, a filter, and a gas storage tank. The outside of the gas storage tank is connected to a sampling device. One of the air outlets of the sampling device is connected to the filter, and the other air outlet of the sampling device is connected to the mass spectrometer. The mass spectrometer is a gas-phase mass spectrometer.

[0007] Preferably, the sampling device includes a placement box. Inside the placement box, there is a fixed connection with a suction cylinder. Inside the suction cylinder, there is a sliding connection with a pull rod. An external thread groove is integrally formed on the outside of the pull rod. One end of the pull rod is rotatably connected to a piston. The outside of the placement box is connected with a quantitative structure; The quantitative structure includes two limit boxes fixedly connected to the outside of the placement box. Inside the limit box, there is a sliding connection with a moving rod. One end of the moving rod close to the pull rod is connected with a threaded plate. On one side of the threaded plate close to the pull rod, an external convex thread is integrally formed. The external convex thread meshes with the thread groove on the outside of the pull rod. The external convex thread and the thread groove are used to provide a threaded rotation suction method between the moving groove and the suction cylinder.

[0008] Preferably, at least two moving grooves are opened inside the pull rod. Inside the moving groove, there is a sliding connection with a magnetic moving block. The magnetic moving block and the moving groove are used to utilize the magnetism of the magnetic moving block itself to push the threaded plate outwards during the movement of the pull rod, so that the external convex thread of the threaded plate no longer meshes with the thread groove of the pull rod.

[0009] Preferably, on both sides of the inner side wall of the moving groove, a plurality of forward ratchet plates are integrally formed. On both sides of the outer side wall of the magnetic moving block, a plurality of reverse ratchet plates are integrally formed. The forward ratchet plates and the reverse ratchet plates are mutually engaged.

[0010] Preferably, on both sides of the inner side wall of the moving groove, a hollow rubber seat is integrally formed. The hollow rubber seat is connected to a plurality of the forward ratchet plates. The forward ratchet plates are made of soft and hollow material. The air inlet of the hollow rubber seat is connected to an air supply pipe. One end of the air supply pipe away from the hollow rubber seat is connected to an air supply balloon.

[0011] Preferably, a moving through groove is opened inside the moving groove. Inside the moving through groove, there is a sliding connection with a connecting plate. Both the upper and lower ends of the connecting plate are fixedly connected with threaded columns. Threaded holes are opened on the outside of the magnetic moving block. The threaded columns are threadedly connected with the threaded holes.

[0012] Preferably, a rubber plate is fixedly connected to the inside of the limit box. A plurality of arc-shaped grooves are opened on the inner side wall of the rubber plate. Two soft arc-shaped extrusion blocks are integrally formed on the outside of the moving rod.

[0013] Preferably, a connecting pipe is communicated with the suction cylinder, a solenoid valve is communicated with the top of the connecting pipe, and a delivery pipe is communicated with the air outlet of the solenoid valve.

[0014] Preferably, a metering valve is communicated with the air inlet end of the suction cylinder, and a communicating pipe is communicated with one end of the metering valve away from the suction cylinder.

[0015] Preferably, a plugging hole is formed in the center of the pull rod, and a knob is plugged inside the plugging hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, when the staff needs to freely extract samples, the air can be pumped by directly pulling the pull rod in cooperation with the piston. When quantitative extraction is required, or when a small dose of gas is supplemented after a large amount of gas is extracted, the moving rod can be pushed to drive the threaded plate to fit with the pull rod. The fitting between the threaded plate and the pull rod forms a threaded connection. In the case of forming a threaded connection, the staff can continuously rotate the pull rod, and gradually adjust the position of the pull rod through the threaded connection between the pull rod and the threaded plate, so as to be able to perform quantitative and small-dose supplementary sampling according to the thread during sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is one of the three-dimensional structural diagrams of the sampling device in the embodiment of the present invention; Figure 2 is the second three-dimensional structural diagram of the sampling device in the embodiment of the present invention; Figure 3 is the third three-dimensional structural diagram of the sampling device in the embodiment of the present invention; Figure 4 is the front structural diagram of the pull rod in the embodiment of the present invention; Figure 5 is the sectional structural diagram of the limit box in the embodiment of the present invention; Figure 6 is the structural diagram of the square magnetic moving block in the embodiment of the present invention; Figure 7 is the embodiment of the present invention Figure 4 The enlarged structural diagram of area A; Figure 8 is the structural diagram of the threaded hole in the embodiment of the present invention; Figure 9 is the structural diagram of the mass spectrometer, sampling device, gas storage tank and filter in the embodiment of the present invention.

[0018] In the figure: 100, placement box; 101, suction cylinder; 102, suction rod; 103, knob; 104, limit box; 105, moving rod; 106, threaded plate; 200, moving groove; 201, magnetic moving block; 300, forward ratchet plate; 301, reverse ratchet plate; 400, hollow rubber seat; 401, air supply pipe; 402, air supply balloon; 500, connecting plate; 501, threaded column; 502, threaded hole; 503, moving through groove; 600, arc groove; 601, soft arc extrusion block; 602, rubber plate; 700, connecting pipe; 701, solenoid valve; 702, delivery pipe; 800, metering valve; 801, communicating pipe. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Example 1. As Figures 1 - 9 shown, a mass spectrometer of the present application includes a mass spectrometer, a filter, and a gas storage tank. An external part of the gas storage tank is communicated with a sampling device. One of the air outlets of the sampling device is communicated with the filter, and the other air outlet of the sampling device is connected to the mass spectrometer. The mass spectrometer is a gas-phase mass spectrometer.

[0021] Specifically, during the gas detection process of the present application, the gas inside the gas storage tank is extracted into the sampling device through the sampling device. In the sampling device, the gas is centrally transported to the filter for filtration, or when filtration is not required, the gas inside the sampling device is transported into the mass spectrometer for monitoring.

[0022] As Figures 1 - 8 shown, in the sampling device, the sampling device includes a placement box 100. An internal part of the placement box 100 is fixedly connected with a suction cylinder 101. A suction rod 102 is slidably connected inside the suction cylinder 101. A threaded groove is integrally formed on the outer part of the suction rod 102. One end of the suction rod 102 is rotatably connected with a piston. A quantitative structure is connected to the outside of the placement box 100; The quantitative structure includes two limit boxes 104 fixedly connected to the outside of the placement box 100. A moving rod 105 is slidably connected inside the limit box 104. One end of the moving rod 105 close to the extraction rod 102 is connected with a threaded plate 106. An external convex thread is integrally formed on one side of the threaded plate 106 close to the extraction rod 102. The external convex thread meshes with the thread groove on the outside of the extraction rod 102. The external convex thread and the thread groove are used to provide a threaded rotation suction method between the moving groove 200 and the suction cylinder 101. A plug hole is opened in the center of the extraction rod 102, and a knob 103 is inserted into the plug hole.

[0023] Specifically, during the sampling process, the staff can pull out the extraction rod 102 through the knob 103. When the extraction rod 102 is pulled, a negative pressure will be formed inside the suction cylinder 101. When the negative pressure is formed, the gas inside the air storage tank will be extracted, and the gas taken out from the air storage tank will be retained inside the suction cylinder 101.

[0024] Furthermore, during the use process, when the staff pulls out the extraction rod 102 and the extraction rod 102 continues to suck, the gas will continuously enter the inside of the suction cylinder 101 as the extraction rod 102 moves. When quantitative suction is required, continuously pulling out the extraction rod 102 may cause an excessive stroke of pulling the extraction rod 102 and too much gas entering the inside of the suction cylinder 101. Therefore, during the suction process, the staff can hold the two moving rods 105 and push the threaded plate 106 to move through the two moving rods 105, and push the two threaded plates 106 to fit the outside of the extraction rod 102. When the threaded plate 106 is fitted to the outside of the extraction rod 102, adjust the threaded connection between the extraction rod 102 and the threaded plate 106 so that the external convex thread of the threaded plate 106 matches the thread groove of the extraction rod 102. When the matching meshing is formed, the staff can rotate the extraction rod 102, so that the extraction rod 102 cooperates with the external convex thread of the threaded plate 106 to form a quantitative forward and backward movement, so that the staff can perform quantitative suction through the thread. The whole does not require complicated adjustment. The staff can first suck a large amount of gas to the predetermined amount. When there is still a small amount of gas not sucked, the quantitative suction effect can be formed through the external convex thread of the extraction rod 102, which is convenient for the staff to adjust according to the use situation, and the adjustment process is more convenient.

[0025] As Figures 1 - 3 shown, the intake end of the suction cylinder 101 is connected to a metering valve 800, and one end of the metering valve 800 away from the suction cylinder 101 is connected to a connecting pipe 801.

[0026] Specifically, during use, to avoid errors in gas sampling, during suction, the metering valve 800 can also be connected to the connecting pipe 801, and the connecting pipe 801 is connected to the gas storage tank. When the connecting pipe 801 is connected to the gas storage tank, when the staff performs suction, the gas will pass through the connecting pipe 801 and the metering valve 800 and then enter the inside of the suction cylinder 101. When the gas passes through the metering valve 800, it will be subjected to metering verification, and a secondary verification can be formed in cooperation with the thread on the outside of the draw rod 102. When the metering valve 800 is not used, quantitative suction can also be completed independently through the draw rod 102.

[0027] Further, the outward movement of the draw rod 102 can also be completed by connecting a motor. The motor is connected to the draw rod 102 through an existing rotating structure, so that the draw rod 102 rotates continuously. When the draw rod 102 rotates continuously, electric quantitative suction is formed. Components such as the motor form an electric control device, and the electric control device is controlled by the main control system.

[0028] As Figures 1 - 2 shown, a connecting pipe 700 is connected to the suction cylinder 101. The top of the connecting pipe 700 is connected to a solenoid valve 701, and the air outlet of the solenoid valve 701 is connected to a delivery pipe 702.

[0029] Specifically, after the gas is sucked into the interior of the suction cylinder 101, by opening the solenoid valve 701, when the solenoid valve 701 is open, the gas will enter the interior of the connecting pipe 700, and is transported through the solenoid valve 701 to the interior of the delivery pipe 702, and is transported through the delivery pipe 702 to the interior of the molecular pump. The gas entering the interior of the molecular pump will be collected by the multi-functional data collector. The models of the multi-functional data collector are "DAM-3160" and "DAM-397C". DAM-397C collects some analog signals during the ionization process and transmits the collected data. During the transmission of the signals generated by ionization, they will pass through the signal transfer box. The signal transfer box converts the analog signals generated by the ion detector into digital signals that can be processed by the computer system, and then adjusts the signals to an appropriate level range. The signal transfer box has multiple interfaces to accurately transmit the signals to the corresponding processing modules. The main control system performs high-speed acquisition of the collected mass spectrometry signals and stores them as standard format files. The main control system also communicates with external devices through its own communication function, transmits the data to the computer, and performs data analysis and processing through the supporting software, and finally presents the mass spectrometry analysis results. DAM-3160 outputs appropriate voltage or current signals to control the operation of the sample injection device, and then the sample enters the vacuum chamber. The molecular pump, through the high-speed rotating blades, "drags" the gas molecules in the vacuum chamber in a specific direction to the pump outlet and is discharged by the backing pump. The vacuum gauge continuously monitors the vacuum degree in the vacuum chamber. After the sample is ionized by the EI source in the vacuum chamber, ion signals are generated.

[0030] As Figure 5 shown, a rubber plate 602 is fixedly connected inside the limit box 104. A plurality of arc-shaped grooves 600 are formed on the inner side wall of the rubber plate 602. Two soft arc-shaped extrusion blocks 601 are integrally formed on the outside of the moving rod 105.

[0031] Specifically, during use, when the staff adjusts the position of the threaded plate 106 through the moving rod 105, when the staff presses the moving rod 105 to push the two threaded plates 106 closer to the drawing rod 102, the moving moving rod 105 will drive the two soft arc-shaped extrusion blocks 601 outside to be clamped into the two arc-shaped grooves 600 close to the drawing rod 102, so that the soft arc-shaped extrusion block 601 is clamped into the arc-shaped groove 600 to form a clamping connection between the moving rod 105 and the threaded plate 106, making the threaded plate 106 fit against the outer wall of the drawing rod 102 to form a threaded connection. The two arc-shaped grooves 600 near the drawing rod 102 are the front arc-shaped grooves 600, and the arc-shaped groove 600 far from the drawing rod 102 is the rear arc-shaped groove 600. And during the process of separating the threaded plate 106 from the drawing rod 102, by pulling the moving rod 105 outwards, the soft arc-shaped extrusion block 601 clamped inside the front arc-shaped groove 600 is made to squeeze the rubber plate 602 and shift into the rear arc-shaped groove 600, so that the moving rod 105 drives the threaded plate 106 to separate from the drawing rod 102, and the rear arc-shaped groove 600 will cooperate with the soft arc-shaped extrusion block 601 to limit the moving rod 105 and the threaded plate 106 again.

[0032] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages: Compared with the prior art, in this embodiment, when the staff needs to freely extract samples, the drawing rod 102 can be directly pulled to cooperate with the piston to pump gas. And when quantitative extraction is required, or when a small amount of gas is to be supplemented after a large amount of gas has been extracted, the moving rod 105 can be pushed to drive the threaded plate 106 to fit against the drawing rod 102. Through the fit between the threaded plate 106 and the drawing rod 102, a threaded connection is formed between the drawing rod 102 and the threaded plate 106. In the case of forming a threaded connection, the staff can continuously rotate the drawing rod 102, and gradually adjust the position of the drawing rod 102 through the threaded connection between the drawing rod 102 and the threaded plate 106, so that quantitative and small-dose supplementary sampling can be carried out according to the thread during sampling.

[0033] Embodiment 2: Considering that during use, when the staff takes small-dose samples or rotates the drawing rod 102 to take samples, if the staff rotates the drawing rod 102 too many times, it will still cause excessive sampling. In the case of excessive sampling, the staff still needs to rotate the drawing rod 102 in the reverse direction to push the gas back into the air storage tank. There will still be a phenomenon of too much or too little gas volume during the second reverse push. For the above technical problems, the present application proposes the following technical solutions to solve the above technical problems. Specifically: As Figures 2 - 8As shown, at least two moving grooves 200 are formed inside the draw rod 102. A magnetic moving block 201 is slidably connected inside the moving groove 200. The magnetic moving block 201 and the moving groove 200 are used to push the threaded plate 106 outwards by the magnetism of the magnetic moving block 201 itself during the movement of the draw rod 102, so that the external convex threads of the threaded plate 106 are no longer engaged with the thread grooves of the draw rod 102.

[0034] Specifically, during use, the staff can adjust the magnetic moving block 201 to any position inside the moving groove 200. A moving scale is connected to the inner wall surface of the moving groove 200. The user can move the moving groove 200 to the position of the specified intake air volume according to the moving scale. After the movement of the moving groove 200 is completed, the staff pushes the draw rod 102 into the inside of the suction cylinder 101 and threadedly connects the threaded plate 106 with the draw rod 102. After the threaded connection is completed, the staff continuously rotates the draw rod 102 out of the inside of the suction cylinder 101. During the rotation process, when the moving groove 200 moves to the position of the threaded plate 106, the repulsive force generated between the moving groove 200 and the threaded plate 106 will push the threaded plate 106 and the moving rod 105 to separate from the draw rod 102, so that there is no longer a threaded connection between the draw rod 102 and the threaded plate 106. Thus, when the staff is still continuously rotating the draw rod 102, the draw rod 102 can only rotate idly and cannot achieve the effect of adjusting the front and rear positions. Without the effect of front and rear adjustment, that is, it cannot drive the piston to move and cannot perform the air suction stroke. Overall, when the draw rod 102 rotates and sucks to the specified degree, it cannot continue to suck again, and the overall effect of quantitative suction is achieved.

[0035] Furthermore, when adjusting the position of the magnetic moving block 201, due to the spacing problem between the threads, when adjusting the position of the moving groove 200, the position of the magnetic moving block 201 should be adjusted accordingly according to the scale on the inner wall surface of the moving groove 200, that is, according to the spacing and scale of the threads of the draw rod 102. There needs to be a redundancy during adjustment to ensure an accurate quantitative suction effect.

[0036] As Figure 8 shown, a moving through groove 503 is formed inside the moving groove 200. A connecting plate 500 is slidably connected inside the moving through groove 503. Threaded columns 501 are fixedly connected to both the upper and lower ends of the connecting plate 500. Threaded holes 502 are formed on the outside of the magnetic moving block 201. The threaded columns 501 are threadedly connected with the threaded holes 502.

[0037] Specifically, during use, the connecting plate 500 can also be inserted into the interior of the moving through groove 503 through the middle insertion hole of the pull rod 102. After the connecting plate 500 is inserted into the interior of the moving through groove 503, the threaded column 501 can be used to connect between the two magnetic moving blocks 201, thereby limiting the two magnetic moving blocks 201 and preventing the threaded hole 502 from disengaging from the moving groove 200.

[0038] As Figure 6 shown, the moving groove 200 is an open square groove, and the magnetic moving block 201 is also square. In the case of using a single magnetic moving block 201, the magnetic poles of the square magnetic moving block 201 are placed in the reverse direction inside the moving groove 200. When the user continuously pulls the pull rod 102 outwards to a specified position, the square magnetic moving block 201 placed in the reverse direction will adsorb the threaded plate 106, so that the threaded plate 106 is adsorbed onto the surface of the pull rod 102, making it impossible for the staff to continue pulling, but only able to adjust by means of screwing.

[0039] Furthermore, the staff can also first pump out all the gas, then adjust the magnetic moving block 201 to the outside, and then slowly rotate the pull rod 102 to push it into the suction cylinder 101. When the magnetic moving block 201 is pushed to the position of the threaded plate 106, the threaded plate 106 can be pushed open, realizing the visual push of the magnetic moving block 201 outside, and the overall is more accurate.

[0040] The technical solutions in the embodiments of the present application described above have at least the following technical effects or advantages: Compared with Embodiment 1, in this embodiment, by presetting the position of the magnetic moving block 201, when the pull rod 102 rotates and moves to a specified position, the repulsive force generated between the magnetic moving block 201 and the threaded plate 106 is used to separate the threaded plate 106 from the pull rod 102. In the case of separating the threaded plate 106 from the pull rod 102, it can be ensured that even if the staff is still rotating the pull rod 102, the piston will not be driven to move for air extraction, and the overall realization of more accurate extraction of a fixed quantity.

[0041] Embodiment 3: Considering that the magnetic moving block 201 is prone to disengaging from the moving groove 200 when moving inside the moving groove 200 and the pull rod 102 is continuously rotating, for the above technical problems, the present application proposes the following technical solutions to solve the above technical problems. Specifically: As Figures 4 - 7 shown, a plurality of forward ratchet plates 300 are integrally formed on both sides of the inner side wall of the moving groove 200, and a plurality of reverse ratchet plates 301 are integrally formed on both sides of the outer side wall of the magnetic moving block 201. The forward ratchet plates 300 and the reverse ratchet plates 301 are engaged with each other.

[0042] Specifically, during use, when the magnetic moving block 201 is placed inside the moving groove 200, the magnetic moving block 201 can be pressed downward, so that the magnetic moving block 201 is completely embedded inside the moving groove 200. When the magnetic moving block 201 is completely embedded inside the moving groove 200, a plurality of reverse ratchet plates 301 outside the magnetic moving block 201 will be engaged with the forward ratchet plate 300 on the inner wall of the moving groove 200. In the case of mutual engagement, the magnetic moving block 201 can be prevented from detaching from the moving groove 200.

[0043] As Figure 8 shown, a moving through groove 503 is provided inside the moving groove 200. A connecting plate 500 is slidably connected inside the moving through groove 503. Threaded columns 501 are fixedly connected to both the upper and lower ends of the connecting plate 500. Threaded holes 502 are provided outside the magnetic moving block 201. The threaded columns 501 are threadedly connected to the threaded holes 502.

[0044] Specifically, during use, the connecting plate 500 can also be inserted into the moving through groove 503 through the middle insertion hole of the pull rod 102. After the connecting plate 500 is inserted into the moving through groove 503, the threaded columns 501 can be used to connect the two magnetic moving blocks 201, so as to limit the two magnetic moving blocks 201 and prevent the threaded holes 502 from detaching from the moving groove 200.

[0045] Furthermore, by using the forward ratchet plate 300 and the reverse ratchet plate 301, the phenomenon that a single magnetic moving block 201 tilts or is placed in the moving groove 200 in other directions can also be avoided.

[0046] Furthermore, through the setting of the connecting plate 500 and the threaded columns 501, the stability of the magnetic moving block 201 inside the moving groove 200 can be further increased. At the same time, when the staff adjusts the position of one of the magnetic moving blocks 201 inside the moving groove 200, the other magnetic moving block 201 can be driven to move together, and it is necessary to move and adjust the two magnetic moving blocks 201 separately.

[0047] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages: Compared with Embodiment III, in this embodiment, the reverse ratchet plate 301 outside the magnetic moving block 201 and the forward ratchet plate 300 on the inner wall of the moving groove 200 can form a mutually engaged phenomenon. The magnetic moving block 201 is limited by the mutual engagement between the forward ratchet plate 300 and the reverse ratchet plate 301. At the same time, during the process of moving the magnetic moving block 201, it can effectively prevent the magnetic moving block 201 from disengaging from the moving groove 200 and guide the moving direction of the magnetic moving block 201, avoiding the phenomenon that the magnetic moving block 201 tilts or adheres to the inner wall of the moving groove 200 laterally.

[0048] Embodiment IV. Considering that during the use process, the material of the threaded plate 106 is a magnetic material, and the magnetic moving block 201 is also a magnetic material. When the magnetic moving block 201 has not completely approached the threaded plate 106, the magnetic material of the threaded plate 106 may attract the magnetic moving block 201, or the magnetic moving block 201 may displace inside the moving groove 200 in the presence of other external magnetic guidance. In the case of displacement inside the moving groove 200, it may cause the separation of the threaded plate 106 and the pull rod 102 to occur prematurely or later, resulting in inaccurate extraction measurement. To solve the above technical problems, the present application proposes the following technical solutions: As Figures 2 - 7 shown, on both sides of the inner side wall of the moving groove 200, hollow rubber seats 400 are integrally formed. The hollow rubber seats 400 communicate with a plurality of forward ratchet plates 300. The forward ratchet plates 300 are made of soft and hollow materials. The air inlet of the hollow rubber seat 400 is connected to an air supply pipe 401, and the end of the air supply pipe 401 away from the hollow rubber seat 400 is connected to an air supply balloon 402.

[0049] Specifically, if a single magnetic moving block 201 is used, the staff can continuously press the air supply balloon 402. When the air supply balloon 402 is continuously pressed, the gas will continuously enter the inside of the air supply pipe 401, and the air supply pipe 401 will transport the gas into the inside of the hollow rubber seat 400 and the forward ratchet plate 300. When the gas enters the inside of the hollow rubber seat 400 and the forward ratchet plate 300, it will cause the hollow rubber seat 400 and the forward ratchet plate 300 to expand. When the hollow rubber seat 400 and the forward ratchet plate 300 expand, they will squeeze the magnetic moving block 201 and the reverse ratchet plate 301. By squeezing the magnetic moving block 201 and the reverse ratchet plate 301, further limitation of the magnetic moving block 201 can be achieved, ensuring the stability of the magnetic moving block 201 at the current position.

[0050] The technical solutions in the embodiments of the present application described above have at least the following technical effects or advantages: Compared with Embodiment 3, in this embodiment, by continuously pressing the balloon 402, external gas can be delivered into the hollow rubber seat 400 and the forward ratchet plate 300. When the gas is delivered into the hollow rubber seat 400 and the forward ratchet plate 300, the hollow rubber seat 400 and the forward ratchet plate 300 will expand. In the case where the hollow rubber seat 400 and the forward ratchet plate 300 expand, the magnetic moving block 201 can be further limited and fixed to avoid the phenomenon that the magnetic moving block 201 is displaced due to external force.

[0051] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mass spectrometer, comprising a mass spectrometer, a filter, and a gas storage tank, characterized in that: The outside of the gas storage tank is connected to a sampling device. One of the gas outlets of the sampling device is connected to a filter instrument, and the other gas outlet of the sampling device is connected to a mass spectrometer, and the mass spectrometer is a gas phase mass spectrometer; The sampling device includes a placement box (100). Inside the placement box (100), a suction cylinder (101) is fixedly connected. Inside the suction cylinder (101), a pull rod (102) is slidably connected. An external thread groove is integrally formed on the outside of the pull rod (102). One end of the pull rod (102) is rotatably connected to a piston. A quantitative structure is connected to the outside of the placement box (100); The quantitative structure includes two limit boxes (104) fixedly connected to the outside of the placement box (100). Inside the limit box (104), a moving rod (105) is slidably connected. One end of the moving rod (105) close to the pull rod (102) is connected to a threaded plate (106). On the side of the threaded plate (106) close to the pull rod (102), an external convex thread is integrally formed, and the external convex thread meshes with the thread groove on the outside of the pull rod (102); At least two moving grooves (200) are formed inside the pull rod (102). Inside the moving groove (200), a magnetic moving block (201) is slidably connected; A moving scale is connected to the inner wall surface of the moving groove (200).

2. A gas sampling device for a mass spectrometer, which uses a mass spectrometer as described in claim 1, characterized in that: The external convex thread and the thread groove are used to provide a threaded rotation suction method between the moving groove (200) and the suction cylinder (101).

3. The gas sampling device of a mass spectrometer according to claim 2, characterized in that: The magnetic moving block (201) and the moving groove (200) are used to use the magnetism of the magnetic moving block (201) itself to push the threaded plate (106) outwards during the movement of the pull rod (102), so that the external convex thread of the threaded plate (106) no longer meshes with the thread groove of the pull rod (102).

4. The gas sampling device of a mass spectrometer according to claim 3, characterized in that: On both sides of the inner side wall of the moving groove (200), a plurality of forward ratchet plates (300) are integrally formed. On both sides of the outer side wall of the magnetic moving block (201), a plurality of reverse ratchet plates (301) are integrally formed, and the forward ratchet plate (300) and the reverse ratchet plate (301) are mutually clamped; 5. The gas sampling device of a mass spectrometer according to claim 4, characterized in that: On both sides of the inner side wall of the moving groove (200), a hollow rubber seat (400) is integrally formed. The hollow rubber seat (400) is connected to a plurality of the forward ratchet plates (300). The forward ratchet plate (300) is made of a soft and hollow material. The air inlet of the hollow rubber seat (400) is connected to an air delivery pipe (401), and one end of the air delivery pipe (401) far from the hollow rubber seat (400) is connected to an air delivery balloon (402).

6. The gas sampling device of a mass spectrometer according to claim 5, characterized in that: A moving through groove (503) is formed inside the moving groove (200). Inside the moving through groove (503), a connecting plate (500) is slidably connected. Threaded columns (501) are fixedly connected to the upper and lower ends of the connecting plate (500). A threaded hole (502) is formed on the outside of the magnetic moving block (201), and the threaded column (501) is threadedly connected to the threaded hole (502).

7. A gas sampling device for a mass spectrometer according to claim 2, wherein: Inside the limiting box (104), a rubber plate (602) is fixedly connected. On the inner side wall of the rubber plate (602), a plurality of arc-shaped grooves (600) are provided. On the outer part of the moving rod (105), two soft arc-shaped extrusion blocks (601) are integrally formed.

8. A gas sampling device for a mass spectrometer according to claim 2, characterized in that: A connecting pipe (700) is communicated with the suction cylinder (101). At the top of the connecting pipe (700), a solenoid valve (701) is communicated. The air outlet of the solenoid valve (701) is communicated with a delivery pipe (702).

9. The gas sampling device of a mass spectrometer according to claim 2, characterized in that: A metering valve (800) is communicated with the air inlet end of the suction cylinder (101). One end of the metering valve (800) far away from the suction cylinder (101) is communicated with a communicating pipe (801).

10. A gas sampling device for a mass spectrometer according to claim 2, characterized in that: A plug hole is provided in the center of the pull rod (102), and a knob (103) is inserted into the inside of the plug hole.

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