A gas sample mixing device for a gas chromatograph-mass spectrometer

Abstract

The utility model discloses a gas sample mixing device for gas chromatograph, including the cylinder, be provided with the support frame on the cylinder outer wall, be provided with the drive mechanism on the support frame, the piston rod is inserted and is slidably installed to one end of the cylinder, and the piston rod is inserted and is slidably installed support frame, and is connected with the drive mechanism, the valve pipe is symmetrically communicated and is set up on the other end of the cylinder, the piston rod one end is provided with the piston plate, and the piston plate is slidably installed in the cylinder, be provided with the screw rod on the other side of piston plate, utilize the rotational speed change of gear to make the stirring blade high -speed rotation, and the gas is fully stirred, and the taper channel of synchronous cylinder accelerates airflow when gas circulation, further enhance the mixing effect of gas, and the piston plate is responsible for the sealing and compression of gas, and the screw rod concentrates on driving stirring component rotation, and the division of labor is clear, through this design, the wear and tear pressure of single component is reduced, and the gas stirring mixing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas sample processing technology, specifically a gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument. Background Technology

[0002] Gas chromatography-mass spectrometry (GC-MS) is an instrument that combines gas chromatography and mass spectrometry, and is widely used for the separation and identification of complex components. Before using GC-MS to perform quantitative and qualitative analysis on gas samples, certain measures must be taken to ensure that the gas samples are mixed uniformly to guarantee the accuracy of the analytical results.

[0003] A search revealed that CN221445965U discloses a gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument. This device allows the external threaded block to rotate continuously during the oscillation of the cylinder and other components by restricting the movement of the crossbar. This enables the gas sample to undergo continuous mixing by the stirring blades rotating with the external threaded block while being repeatedly compressed and expanded, thereby further accelerating the homogenization of the gas sample.

[0004] In the aforementioned prior art, the device compresses gas by pushing the external threaded cover. However, the threaded connection method used in this device is prone to wear at the threaded connection between the external threaded cover and related components due to frequent relative rotation during long-term use, which affects the stability and reliability of gas compression. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] In view of the problems existing in the above and / or existing gas sample mixing devices for gas chromatography-mass spectrometry (GC-MS), this utility model is proposed.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument includes a cylindrical body, a support frame on the outer wall of the cylindrical body, a drive mechanism on the support frame, a piston rod inserted into and slidably mounted on one end of the cylindrical body, the piston rod being inserted into and slidably mounted on the support frame and connected to the drive mechanism, valve pipes symmetrically connected to the other end of the cylindrical body, and a piston plate on one end of the piston rod, the piston plate being slidably mounted inside the cylindrical body.

[0008] As a preferred embodiment of the gas sample mixing device for gas chromatography-mass spectrometry (GC-MS) described in this utility model, a screw is provided on the other side of the piston plate, a rotating ring is rotatably installed inside the cylinder, a screw sleeve is screwed onto the outer wall of the screw, and a uniformly distributed connecting frame is provided between the screw sleeve and the rotating ring, a rotating plate is also rotatably installed inside the cylinder, and a uniformly distributed stirring blade is provided on one side of the rotating plate, and a connecting mechanism is provided between the rotating plate and the rotating ring.

[0009] As a preferred embodiment of the gas sample mixing device for a gas chromatography-mass spectrometry instrument described in this utility model, an enlarged section is provided on the outer wall of the cylinder.

[0010] As a preferred embodiment of the gas sample mixing device for gas chromatography-mass spectrometry (GC-MS) described in this utility model, the connecting mechanism includes a synchronization cylinder rotatably installed inside the cylinder body, and the synchronization cylinder is connected to the rotating ring. A gear ring is provided on one side of the synchronization cylinder, and the gear ring is rotatably installed inside the enlarged part. Therefore, a uniformly distributed first gear is inserted into and rotatably installed on the inner wall of the enlarged part. A second gear is provided on the other side of the rotating plate, and the second gear meshes with the first gear.

[0011] In a preferred embodiment of the gas sample mixing device for a gas chromatography-mass spectrometry instrument described in this utility model, the first gear and the second gear are respectively configured as a large gear and a small gear.

[0012] As a preferred embodiment of the gas sample mixing device for a gas chromatography-mass spectrometry instrument described in this utility model, a conical channel is provided on the inner wall of the synchronization cylinder.

[0013] As a preferred embodiment of the gas sample mixing device for a gas chromatography-mass spectrometry instrument described in this utility model, the connecting frame is configured with a curved structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are: In this design, the speed variation of the gears causes the stirring blades to rotate at high speed, which fully stirs the gas. The conical channel of the synchronous cylinder accelerates the airflow during gas flow, further enhancing the gas mixing effect. The piston plate is responsible for gas sealing and compression, while the screw focuses on driving the stirring components to rotate. With clear division of labor, this design reduces the wear pressure of individual components and improves the gas stirring and mixing effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of a gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to the present invention. Figure 2 This is a first-view structural diagram of the internal structure of the gas sample mixing device for a gas chromatography-mass spectrometry instrument according to the present invention. Figure 3 This is a second-view structural diagram of the internal structure of the gas sample mixing device for a gas chromatography-mass spectrometry instrument according to the present invention. Figure 4 This is a schematic diagram of the internal structure of the conical channel of a gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to this utility model.

[0016] In the diagram: 1. Cylinder; 2. Support frame; 3. Valve pipe; 4. Drive mechanism; 5. Piston rod; 6. Enlarged part; 7. Piston plate; 8. Screw; 9. Synchronizing cylinder; 10. Rotating ring; 11. Screw sleeve; 12. Connecting frame; 13. Gear ring; 14. First gear; 15. Rotating plate; 16. Stirring blade; 17. Conical channel; 18. Second gear. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0020] Example Please see Figures 1-4 This utility model provides a technical solution: A gas sample mixing device for gas chromatography-mass spectrometry (GC-MS) can efficiently mix gas samples. Its reasonable structural design reduces the impact of thread wear on gas compression stability, making it more reliable in use.

[0021] The gas sample mixing device for the gas chromatography-mass spectrometry instrument includes a cylinder 1, which is a cylindrical hollow structure made of corrosion-resistant metal material and is used to contain gas samples. A support frame 2 is welded to the outer wall of the cylinder 1. The support frame 2 is a steel frame that serves to support and fix the sample. A drive mechanism 4 is installed on the support frame 2. The drive mechanism 4 is a motor-driven circular plate rocker mechanism that can convert rotational motion into linear reciprocating motion. A piston rod 5 is inserted into and slidably installed at one end of the cylinder 1. The piston rod 5 is inserted into the support frame 2 and slidably installed, and is connected to the drive mechanism 4. It can reciprocate along the axis of the cylinder 1 under the drive of the drive mechanism 4. A valve pipe 3 is symmetrically connected to the other end of the cylinder 1. A valve is installed on the valve pipe 3, which is used to introduce gas samples and discharge mixed gas, respectively. A piston plate 7 is welded to one end of the piston rod 5. The piston plate 7 is a circular plate that fits tightly against the inner wall of the cylinder 1 and is slidably installed inside the cylinder 1 to compress the gas inside the cylinder 1. A screw 8 is welded to the other side of the piston plate 7. A rotating ring 10 is rotatably mounted inside the cylinder 1 via a bearing. A threaded sleeve 11 is screwed onto the outer wall of the screw 8. A uniformly distributed connecting frame 12 is welded between the threaded sleeve 11 and the rotating ring 10. The connecting frame 12 is designed with a curved structure, possessing a certain degree of elasticity and toughness. A rotating plate 15 is also rotatably mounted inside the cylinder 1 via a bearing. A uniformly distributed stirring blade 16 is welded to one side of the rotating plate 15. The stirring blade 16 is an arc-shaped blade used for stirring gas. A connecting mechanism is provided between the rotating plate 15 and the rotating ring 10 for transmitting power. An enlarged section 6 is integrally formed on the outer wall of the cylinder 1. The enlarged section 6 is a cylindrical structure with a diameter larger than that of the cylinder 1, providing more internal space for installing a transmission mechanism. The components and connecting mechanism include a synchronous cylinder 9 rotatably mounted inside the cylinder body 1 via bearings. The synchronous cylinder 9 is welded to the rotating ring 10 and can rotate synchronously with the rotating ring 10. A gear ring 13 is welded to one side of the synchronous cylinder 9 and is rotatably mounted inside the enlarged part 6. A first gear 14 is evenly distributed and rotatably mounted on the inner wall of the enlarged part 6 via bearings. A second gear 18 is welded to the other side of the rotating plate 15 and meshes with the first gear 14. The first gear 14 and the second gear 18 are respectively set as a large gear and a small gear, which can realize the change of rotation speed. A conical channel 17 is opened on the inner wall of the synchronous cylinder 9. The conical channel 17 gradually narrows from the inlet to the outlet of the synchronous cylinder 9, which can accelerate the gas flow speed.

[0022] The piston plate 7 drives the screw 8 to move. Through the screw connection between the screw 8 and the screw sleeve 11, the linear motion is converted into the rotational motion of the screw sleeve 11, the rotating ring 10, the synchronous cylinder 9, and the gear ring 13. The gear ring 13 transmits power to the rotating plate 15 and the stirring blade 16 by meshing with the first gear 14 and the second gear 18. The speed change of the gears makes the stirring blade 16 rotate at high speed, which fully stirs the gas. The conical channel 17 of the synchronous cylinder 9 accelerates the airflow when the gas flows, further enhancing the gas mixing effect. The piston plate 7 is mainly responsible for the sealing and compression of the gas, while the screw 8 focuses on driving the stirring components to rotate. The division of labor is clear, which reduces the wear pressure of individual components.

[0023] In use, the gas sample to be mixed is first introduced into the cylinder 1 through one of the valve pipes 3. The valve of the valve pipe 3 is then closed, and the drive mechanism 4 is activated. The drive mechanism 4 drives the piston rod 5 to reciprocate. The piston rod 5 drives the piston plate 7 to slide back and forth inside the cylinder 1. When the piston plate 7 pushes into the cylinder 1, it compresses the gas inside the cylinder 1. After being compressed, the gas passes through the conical channel 17 of the synchronous cylinder 9. Due to the narrowing of the channel, the gas flow speed is increased, enhancing the collision and mixing between gas molecules. At the same time, the piston plate 7 drives the screw 8 to move synchronously. The screw 8 is screwed to the screw sleeve 11. During the movement of the screw 8, the screw sleeve 11 is driven to rotate. The screw sleeve 11 drives the rotating ring 10 to rotate through the connecting frame 12. The rotating ring 10 drives the synchronous cylinder 9 and the gear ring 13 to rotate. The gear ring 13 meshes with the first gear 14, driving the first gear... When wheel 14 rotates, the first gear 14 meshes with the second gear 18, driving the second gear 18 and rotating plate 15 to rotate. The stirring blade 16 on the rotating plate 15 rotates accordingly, stirring the gas inside the cylinder 1. Since the first gear 14 is a large gear and the second gear 18 is a small gear, the rotation speed of the rotating plate 15 and stirring blade 16 is higher than that of the gear ring 13, which improves the stirring effect. When the piston plate 7 retracts out of the cylinder 1, the space inside the cylinder 1 increases, and the gas expands. At the same time, the screw 8 moves in the opposite direction, driving the screw sleeve 11, rotating ring 10, etc. to rotate in the opposite direction. The stirring blade 16 also rotates in the opposite direction, continuously stirring the gas. After repeated compression, expansion, and stirring, the gas sample reaches a uniformly mixed state. At this time, the valve of another valve pipe 3 is opened to discharge the mixed gas sample for analysis by gas chromatography-mass spectrometry.

[0024] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument, characterized in that, The device includes a cylinder (1), a support frame (2) is provided on the outer wall of the cylinder (1), a drive mechanism (4) is provided on the support frame (2), a piston rod (5) is inserted into and slidably installed at one end of the cylinder (1), the piston rod (5) is inserted into the support frame (2) and slidably installed, and connected to the drive mechanism (4), a valve pipe (3) is symmetrically connected to the other end of the cylinder (1), a piston plate (7) is provided at one end of the piston rod (5), and the piston plate (7) is slidably installed inside the cylinder (1).

2. The gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to claim 1, characterized in that, A screw (8) is provided on the other side of the piston plate (7). A rotating ring (10) is rotatably installed inside the cylinder (1). A screw sleeve (11) is screwed onto the outer wall of the screw (8). A connecting frame (12) is evenly distributed between the screw sleeve (11) and the rotating ring (10). A rotating plate (15) is also rotatably installed inside the cylinder (1). A stirring blade (16) is evenly distributed on one side of the rotating plate (15). A connecting mechanism is provided between the rotating plate (15) and the rotating ring (10).

3. The gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to claim 2, characterized in that, An enlarged section (6) is provided on the outer wall of the cylinder (1).

4. The gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to claim 3, characterized in that, The connecting mechanism includes a synchronous cylinder (9) rotatably installed inside the cylinder (1), and the synchronous cylinder (9) is connected to the rotating ring (10). A gear ring (13) is provided on one side of the synchronous cylinder (9), and the gear ring (13) is rotatably installed inside the enlarged part (6). Therefore, a first gear (14) is inserted into and rotatably installed on the inner wall of the enlarged part (6). A second gear (18) is provided on the other side of the rotating plate (15), and the second gear (18) meshes with the first gear (14).

5. A gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to claim 4, characterized in that, The first gear (14) and the second gear (18) are respectively configured as a large gear and a small gear.

6. A gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to claim 4, characterized in that, A tapered channel (17) is provided on the inner wall of the synchronization cylinder (9).

7. A gas sample mixing device for a gas chromatography-mass spectrometry (GC-MS) instrument according to claim 2, characterized in that, The connecting frame (12) is configured with a curved structure.

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