A gas chromatography-triple quadrupole tandem mass spectrometer

Abstract

The utility model discloses a kind of gas chromatography-three quadrupole tandem mass spectrometry, it is related to detection equipment technical field, to the problem that there is direction interface reverse influence detection result risk after directly hanging chromatographic column to unconfirmed nameplate, including gas chromatography-mass spectrometer, gas chromatography-mass spectrometer is provided with column oven, column oven is provided with sample inlet interface and FID detection interface in, movable setting has chromatographic column on the inner side wall of column oven, the inner side wall of column oven is provided with the suspension mechanism for placing chromatographic column, the inner side wall of column oven is provided with the clamping mechanism for fixed nameplate on chromatographic column, driving mechanism for controlling the use state of suspension mechanism is connected on clamping mechanism.The utility model discloses a kind of gas chromatography-three quadrupole tandem mass spectrometry has the forced logic that suspension mechanism cannot be unlocked when unfix nameplate, so as not to hang chromatographic column, avoid chromatographic column interface reverse caused by operator negligence, guarantee test result accuracy.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment technology, and in particular to a gas chromatography-triple quadrupole tandem mass spectrometer. Background Technology

[0002] Gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS) is a core instrument in laboratories for the separation of mixtures and the detection of components. Its working principle involves separating a mixture into individual components using a chromatographic column, followed by qualitative and quantitative analysis of these components using a mass spectrometer. During operation, the orientation of the chromatographic column is crucial; the positive end must be connected to the injection port, and the negative end to the FID detection port. Inverting this orientation will prevent the separated components from entering the detector along the preset path, leading to disordered peaks, data deviations, or even detection failure.

[0003] When installing a chromatographic column in existing equipment, the operator must first observe the nameplate on the column to ensure it faces outwards before suspending the column on the rack inside the column oven. Then, the column is connected to the injection port clockwise and the FID detection port counterclockwise. During this process, the rack is a fixed structure, allowing the column to be suspended regardless of the nameplate orientation. There are no mechanical structures to restrict the operation of "suspending the column without confirming the nameplate orientation." If the operator, due to fatigue, negligence, or lack of experience, suspends the column without confirming the nameplate orientation, it is highly likely that the column will be connected incorrectly, leading to detection failure or deviation, which is detrimental to the safe use of the equipment. Utility Model Content

[0004] This utility model discloses a gas chromatography-triple quadrupole tandem mass spectrometer, which aims to solve the technical problem that the reverse orientation of the chromatographic column after the nameplate is directly suspended without confirmation may affect the detection results.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS) system includes a GC-MS instrument, a column oven with an injection port and an FID detection port inside the column oven, a chromatographic column movably mounted on the inner wall of the column oven, a suspension mechanism for placing the chromatographic column on the inner wall of the column oven, a clamping mechanism for fixing the nameplate on the chromatographic column on the inner wall of the column oven, and a transmission mechanism connected to the clamping mechanism for controlling the operating state of the suspension mechanism.

[0006] In a preferred embodiment, the suspension mechanism includes a base, a rotating shaft, a suspension rod, and a torsion spring. The base is installed on the inner wall of the column temperature chamber, the rotating shaft is connected to the suspension rod, the suspension rod is rotatably connected to the base through the rotating shaft, and the torsion spring is sleeved on the rotating shaft. The elastic force of the torsion spring is used to keep the suspension rod in a non-vertical state when it is not unlocked.

[0007] In a preferred embodiment, the clamping mechanism includes a connecting plate, a bracket, an ear plate holder, a limiting rib, a slide block, a gripper, a limiting slide shaft, and a spring. The connecting plate is installed on the inner wall of the column oven, the bracket is connected to the connecting plate, the ear plate holder is connected to both sides of the bracket, the limiting ribs are symmetrically arranged on the ear plate holder, the limiting slide shaft is connected to the ear plate holder, the slide block is slidably connected to the limiting slide shaft, the slide block is in contact with the limiting rib, the gripper is connected to the slide block, and the spring is sleeved on the limiting slide shaft. The spring force is used to make the gripper stably clamp the nameplate of the chromatographic column.

[0008] In a preferred embodiment, the transmission mechanism includes a rotating base, a connecting rotating plate, a connecting rod, a limiting slide groove, an ear seat, and a limiting ring. The rotating base is mounted on a slide, one end of the connecting rotating plate is rotatably connected to the rotating base, the limiting slide groove is formed on the connecting plate, the connecting rod is slidably connected in the limiting slide groove, the ear seat is connected to both sides of the connecting rod, the other end of the connecting rotating plate is rotatably connected to the ear seat, and the limiting ring is connected to the top side of the connecting rod. The limiting ring is in contact with the base when the suspension mechanism is not unlocked.

[0009] In a preferred embodiment, one end of the torsion spring abuts against the base, and the other end abuts against the suspension rod. In its natural state, the suspension rod is at a non-perpendicular angle to the inner wall of the column oven, making it impossible to stably suspend the chromatographic column.

[0010] In a preferred embodiment, the gripper includes an arc-shaped top and a bottom. The arc-shaped top is used to guide the slides away from each other when the nameplate is squeezed, and the bottom is used to adhere to the surface of the nameplate under the action of spring force, so as to achieve stable clamping of the nameplate.

[0011] In a preferred embodiment, when the connecting rod slides along the limiting groove, it causes the limiting ring to switch between two positions: contacting the base and contacting the suspension rod. When the limiting ring contacts the suspension rod, the suspension rod can overcome the torsion spring force and rotate to a position perpendicular to the inner wall of the column temperature chamber.

[0012] As can be seen from the above, the gas chromatography-triple quadrupole tandem mass spectrometer provided by this utility model forms a forced logic that the suspension mechanism cannot be unlocked when the nameplate is not fixed, thus preventing the chromatographic column from being suspended. This avoids the chromatographic column being connected backwards due to operator negligence and ensures the accuracy of test results. The clamping mechanism's claws and the arc-shaped top design facilitate the quick insertion of nameplates of different sizes, improving the ease of use and wide applicability of the structure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a gas chromatography-triple quadrupole tandem mass spectrometer proposed in this utility model.

[0014] Figure 2This is a schematic diagram of the ear seat structure of a gas chromatography-triple quadrupole tandem mass spectrometer proposed in this utility model.

[0015] Figure 3 This is a schematic diagram of the suspension rod structure of a gas chromatography-triple quadrupole tandem mass spectrometer proposed in this utility model.

[0016] Figure 4 This is a schematic diagram of the bracket structure of a gas chromatography-triple quadrupole tandem mass spectrometer proposed in this utility model.

[0017] Figure 5 This is a schematic diagram of the ear plate frame structure of a gas chromatography-triple quadrupole tandem mass spectrometer proposed in this utility model. Figure 6 This is a schematic diagram of the gripper structure of a gas chromatography-triple quadrupole tandem mass spectrometer proposed in this utility model.

[0018] In the attached diagram: 1. Gas chromatography-mass spectrometry (GC-MS) instrument; 2. Column oven; 3. Chromatographic column; 4. Injection port; 5. FID detection port; 6. Suspension mechanism; 601. Base; 602. Rotating shaft; 603. Suspension rod; 604. Torsion spring; 7. Clamping mechanism; 701. Connecting plate; 702. Bracket; 703. Ear plate holder; 704. Limiting rib; 705. Slide seat; 706. Gripper; 707. Limiting slide shaft; 708. Spring; 8. Transmission mechanism; 801. Rotary seat; 802. Connecting rotating plate; 803. Connecting rod; 804. Limiting slide groove; 805. Ear seat; 806. Limiting ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] The gas chromatography-triple quadrupole tandem mass spectrometer disclosed in this utility model is mainly used in scenarios where existing devices may have risks of reversed orientation affecting detection results if the chromatographic column is directly suspended without confirming the nameplate.

[0021] Reference Figures 1-6 A gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS) system includes a GC-MS system 1, a column oven 2 on the GC-MS system 1, an injection port 4 and an FID detection port 5 inside the column oven 2, a chromatographic column 3 movably mounted on the inner wall of the column oven 2, a suspension mechanism 6 for placing the chromatographic column 3 on the inner wall of the column oven 2, a clamping mechanism 7 for fixing the nameplate on the chromatographic column 3 on the inner wall of the column oven 2, and a transmission mechanism 8 connected to the clamping mechanism 7 for controlling the operating state of the suspension mechanism 6.

[0022] When using this gas chromatograph-triple quadrupole tandem mass spectrometer, the nameplate should be placed facing outwards and pressed against the clamping mechanism 7 to secure it. This facilitates subsequent observation and causes the transmission mechanism 8 to move. The movement of the transmission mechanism 8 changes the motion of the suspension mechanism 6, allowing the chromatographic column 3 to be placed on the suspension mechanism 6 and secured. This prevents the column from being hung in the wrong direction due to operator negligence in not observing the nameplate, thus ensuring the accuracy of the test results.

[0023] Reference Figures 1-4 In a preferred embodiment, the suspension mechanism 6 includes a base 601, a rotating shaft 602, a suspension rod 603, and a torsion spring 604. The base 601 is installed on the inner side wall of the column temperature chamber 2. The rotating shaft 602 is connected to the suspension rod 603. The suspension rod 603 is rotatably connected to the base 601 through the rotating shaft 602. The torsion spring 604 is sleeved on the rotating shaft 602. The elastic force of the torsion spring 604 is used to keep the suspension rod 603 in a non-vertical state when it is not unlocked.

[0024] The base 601 is installed on the inner wall of the column oven 2 to provide fixed support for the entire suspension mechanism. The rotating shaft 602 is connected to the suspension rod 603, so that the suspension rod 603 can rotate with the base 601 through the rotating shaft 602. The torsion spring 604 is sleeved on the rotating shaft 602, and its elastic force has a reset and limiting function. When the nameplate is not fixed, the elastic force of the torsion spring 604 will keep the suspension rod 603 in a non-vertical state and cannot stably support the chromatographic column 3.

[0025] Reference Figures 1-6 In a preferred embodiment, the clamping mechanism 7 includes a connecting plate 701, a bracket 702, an ear plate frame 703, a limiting rib 704, a slide 705, a gripper 706, a limiting slide shaft 707, and a spring 708. The connecting plate 701 is installed on the inner side wall of the column oven 2. The bracket 702 is connected to the connecting plate 701. The ear plate frame 703 is connected to both sides of the bracket 702. The limiting ribs 704 are symmetrically arranged on the ear plate frame 703. The limiting slide shaft 707 is connected to the ear plate frame 703. The slide 705 is slidably connected to the limiting slide shaft 707 and is in contact with the limiting rib 704. The gripper 706 is connected to the slide 705. The spring 708 is sleeved on the limiting slide shaft 707. The elastic force of the spring 708 is used to make the gripper 706 stably clamp the nameplate of the chromatographic column 3.

[0026] The connecting plate 701 is installed on the inner wall of the column oven 2 to provide a fixed base for the clamping mechanism. The bracket 702 is connected to the connecting plate 701, and the ear plate frame 703 is connected to both sides of the bracket 702 to form a support frame. The limiting ribs 704 are symmetrically arranged on the ear plate frame 703, and the limiting slide shaft 707 is connected to the ear plate frame 703. The two work together to form a double guide for the slide 705. The slide 705 is slidably connected to the limiting slide shaft 707 and in contact with the limiting ribs 704 to ensure that the slide 705 does not deviate when sliding. The gripper 706 is connected to the slide 705, and the spring 708 is sleeved on the limiting slide shaft 707. The elastic force of the spring 708 can push the two slides 705 closer to each other, thereby making the gripper 706 stably clamp the nameplate of the chromatographic column 3.

[0027] Reference Figures 1-6 In a preferred embodiment, the transmission mechanism 8 includes a rotating base 801, a connecting rotating plate 802, a connecting rod 803, a limiting slide groove 804, an ear seat 805, and a limiting ring 806. The rotating base 801 is mounted on the slide 705. One end of the connecting rotating plate 802 is rotatably connected to the rotating base 801. The limiting slide groove 804 is formed on the connecting plate 701. The connecting rod 803 is slidably connected in the limiting slide groove 804. The ear seat 805 is connected to both sides of the connecting rod 803. The other end of the connecting rotating plate 802 is rotatably connected to the ear seat 805. The limiting ring 806 is connected to the top side of the connecting rod 803. The limiting ring 806 is in contact with the base 601 when the suspension mechanism 6 is not unlocked.

[0028] The rotating base 801 is mounted on the slide 705 and moves synchronously with the slide 705. One end of the connecting rotating plate 802 is rotatably connected to the rotating base 801 and can change angle as the rotating base 801 moves. The limiting groove 804 provides a sliding path for the connecting rod 803, which is slidably connected in the limiting groove 804. The ear seat 805 is connected to both sides of the connecting rod 803, and the other end of the connecting rotating plate 802 is rotatably connected to the ear seat 805. The limiting ring 806 is connected to the top side of the connecting rod 803. When the nameplate is not fixed by the clamping mechanism, the limiting ring 806 is in contact with the base 601. When the nameplate is fixed by the clamping mechanism, the connecting rod 803 slides, and the limiting ring 806 disengages from the base 601 and contacts the suspension rod 603, so that the suspension rod 603 rotates to a position perpendicular to the inner wall of the column oven 2, which facilitates stable suspension of the chromatographic column 3.

[0029] Reference Figures 1-3 In a preferred embodiment, one end of the torsion spring 604 abuts against the base 601, and the other end abuts against the suspension rod 603. In the natural state of the torsion spring 604, the suspension rod 603 is at a non-perpendicular angle to the inner wall of the column oven 2, and cannot stably suspend the chromatographic column 3.

[0030] In its natural state, the torsion spring 604 is at a non-perpendicular angle to the inner wall of the column oven 2. This angle design causes the bearing end of the suspension rod 603 to tilt, making it unable to stably support the weight of the chromatographic column 3, thus making it impossible to complete the suspension operation.

[0031] Reference Figure 6 In a preferred embodiment, the gripper 706 includes an arc-shaped top and a bottom. The arc-shaped top is used to guide the slides 705 away from each other when the nameplate is squeezed, and the bottom is used to adhere to the surface of the nameplate under the elastic force of the spring 708 to achieve stable clamping of the nameplate.

[0032] The top of the arc segment adopts an arc-shaped design. When the operator squeezes the nameplate, the arc-shaped surface can guide the nameplate smoothly into the space between the two grippers 706. At the same time, the arc-shaped guide effect drives the slide blocks 705 to move away from each other along the limiting slide shaft 707. The bottom of the grippers 706 is flat or conforms to the surface of the nameplate. When the nameplate reaches the bottom position, the elastic force of the spring 708 pushes the slide blocks 705 closer together, so that the bottom fits tightly with the surface of the nameplate, realizing stable clamping of nameplates of different sizes and preventing the nameplate from shifting or falling off in subsequent operations.

[0033] Reference Figure 1-6 In a preferred embodiment, when the connecting rod 803 slides along the limiting groove 804, it drives the limiting ring 806 to switch between two positions: contacting the base 601 and contacting the suspension rod 603. When the limiting ring 806 contacts the suspension rod 603, the suspension rod 603 can overcome the elastic force of the torsion spring 604 and rotate to a position perpendicular to the inner wall of the column temperature chamber 2.

[0034] When the clamping mechanism 7 fixes the nameplate, the slide block 705 slides and drives the rotating block 801 to move. Through the transmission connecting the rotating plate 802 and the ear block 805, the connecting rod 803 slides along the limiting slide groove 804. When the connecting rod 803 slides, it synchronously drives the limiting ring 806 to switch between two positions.

[0035] Working principle: The operator holds the chromatographic column 3, aligning its nameplate outwards with the top of the arc segment of the two grippers 706, and applies pressure to squeeze the grippers 706. The top of the arc segment guides the nameplate into the space between the grippers 706, while simultaneously causing the two slide blocks 705 to move away from each other along the limiting slide shaft 707. The spring 708 is compressed. When the nameplate reaches the bottom of the grippers 706, the pressure is released, the spring 708 returns to its original position, and pushes the slide blocks 705 closer together. The bottom of the grippers 706 then adheres to the nameplate, completing the fixation. As the slide blocks 705 move away from each other, the rotating block 801 moves. The rotating base 801 pulls the ear seat 805 to move via the connecting plate 802. The ear seat 805 drives the connecting rod 803 to slide along the limiting groove 804. The connecting rod 803 simultaneously drives the limiting ring 806 to move, disengaging from the base 601 and finally contacting the bottom of the suspension rod 603. This allows the column to overcome the elastic force of the torsion spring 604 and rotate around the rotating shaft 602 until it is perpendicular to the inner wall of the column oven 2. The chromatographic column 3 is then suspended on the suspension rod 603. The clockwise interface of the chromatographic column 3 is connected to the injection interface 4, and the counterclockwise interface is connected to the FID detection interface 5, completing the installation.

[0036] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS) system, comprising a GC-MS system (1), a column oven (2) provided on the GC-MS system (1), an injection port (4) and an FID detection port (5) provided inside the column oven (2), and a chromatographic column (3) movably disposed on the inner wall of the column oven (2), characterized in that, The inner wall of the column oven (2) is provided with a suspension mechanism (6) for placing the chromatographic column (3), and the inner wall of the column oven (2) is provided with a clamping mechanism (7) for fixing the nameplate on the chromatographic column (3). The clamping mechanism (7) is connected to a transmission mechanism (8) for controlling the use state of the suspension mechanism (6).

2. The gas chromatography-triple quadrupole tandem mass spectrometry system according to claim 1, characterized in that, The suspension mechanism (6) includes a base (601), a rotating shaft (602), a suspension rod (603), and a torsion spring (604). The base (601) is installed on the inner wall of the column temperature chamber (2). The rotating shaft (602) is connected to the suspension rod (603). The suspension rod (603) is rotatably connected to the base (601) through the rotating shaft (602). The torsion spring (604) is sleeved on the rotating shaft (602). The elastic force of the torsion spring (604) is used to keep the suspension rod (603) in a non-vertical state when it is not unlocked.

3. The gas chromatography-triple quadrupole tandem mass spectrometry system according to claim 2, characterized in that, The clamping mechanism (7) includes a connecting plate (701), a bracket (702), an ear plate bracket (703), a limiting rib (704), a slide (705), a gripper (706), a limiting slide shaft (707), and a spring (708). The connecting plate (701) is installed on the inner wall of the column temperature chamber (2), the bracket (702) is connected to the connecting plate (701), the ear plate bracket (703) is connected to both sides of the bracket (702), and the limiting ribs (704) are symmetrical. The ear plate holder (703) is provided with a limiting slide shaft (707) connected to the ear plate holder (703), a slide block (705) is slidably connected to the limiting slide shaft (707), the slide block (705) is in contact with the limiting rib (704), the gripper (706) is connected to the slide block (705), and a spring (708) is sleeved on the limiting slide shaft (707). The elastic force of the spring (708) is used to make the gripper (706) stably hold the nameplate of the chromatography column (3).

4. The gas chromatography-triple quadrupole tandem mass spectrometry system according to claim 3, characterized in that, The transmission mechanism (8) includes a rotating seat (801), a connecting rotating plate (802), a connecting rod (803), a limiting groove (804), an ear seat (805), and a limiting ring (806). The rotating seat (801) is mounted on the sliding seat (705). One end of the connecting rotating plate (802) is rotatably connected to the rotating seat (801). The limiting groove (804) is opened on the connecting plate (701). The connecting rod (803) is slidably connected in the limiting groove (804). The ear seat (805) is connected to both sides of the connecting rod (803). The other end of the connecting rotating plate (802) is rotatably connected to the ear seat (805). The limiting ring (806) is connected to the top side of the connecting rod (803). The limiting ring (806) is in contact with the base (601) when the suspension mechanism (6) is not unlocked.

5. A gas chromatography-triple quadrupole tandem mass spectrometry system according to claim 4, characterized in that, One end of the torsion spring (604) abuts against the base (601), and the other end abuts against the suspension rod (603). In the natural state of the torsion spring (604), the suspension rod (603) is at a non-perpendicular angle to the inner wall of the column oven (2), and cannot stably suspend the chromatographic column (3).

6. The gas chromatography-triple quadrupole tandem mass spectrometry system according to claim 5, characterized in that, The gripper (706) includes an arc-shaped top and a bottom. The arc-shaped top is used to guide the slide (705) away from each other when the nameplate is squeezed, and the bottom is used to adhere to the surface of the nameplate under the elastic force of the spring (708) to achieve stable clamping of the nameplate.

7. A gas chromatography-triple quadrupole tandem mass spectrometry system according to claim 6, characterized in that, When the connecting rod (803) slides along the limiting groove (804), it drives the limiting ring (806) to switch between two positions: contacting the base (601) and contacting the suspension rod (603). When the limiting ring (806) contacts the suspension rod (603), the suspension rod (603) can overcome the elastic force of the torsion spring (604) and rotate to a position perpendicular to the inner wall of the column temperature box (2).

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