Gas chromatograph-mass spectrometer capable of controlling sample quantity

Abstract

The utility model relates to the field of a gas chromatograph-mass spectrometer, and provides a gas chromatograph-mass spectrometer capable of controlling the sample quantity, a feeding suction assembly comprises a hanging frame, the hanging frame is arranged on the inner side of a liquid inlet frame, a pump box is arranged at the tail end of a suction pipe, a flow guide cavity is arranged in the pump box, a throttling cavity is arranged in the flow guide cavity, a sealing ring is arranged at the lower end in the throttling cavity, and a sealing ring is arranged at the lower end in the throttling cavity. A driving box is arranged on the inner side of the pump box, an output motor is arranged at the bottom of the driving box, a driving drum membrane is arranged in the driving box, a pushing shaft is arranged on the inner side of the driving drum membrane, a driving frame is arranged at the bottom of the pushing shaft, a meshing rack is arranged on the lower end face of the driving frame, and a driving gear is arranged at the output end of the output motor. And the driving gear is meshed with the meshing rack. By means of the technical scheme, the problems that in the prior art, when a combination instrument is used, sample injection needs to be conducted, dosage control is difficult in the sample injection process, and sample liquid needs to be mixed in advance are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of combined instruments, and specifically, to a gas chromatography - mass spectrometry (GC - MS) instrument capable of controlling the sample volume. Background Technique

[0002] A gas chromatography - mass spectrometry (GC - MS) instrument refers to an instrument that combines a gas chromatograph and a mass spectrometer. Mass spectrometry can perform effective qualitative analysis, but it is powerless in the analysis of complex organic compounds; while chromatography is an effective separation and analysis method for organic compounds, especially suitable for quantitative analysis of organic compounds, but qualitative analysis is relatively difficult. Therefore, the effective combination of these two will surely provide chemists and biochemists with a highly efficient tool for qualitative and quantitative analysis of complex organic compounds. The technology of combining two or more methods like this is called combined technology. The gas chromatography - mass spectrometry (GC - MS) instrument is widely used in the separation and identification of complex components. It has the high resolution of GC and the high sensitivity of MS, and is an effective tool for qualitative and quantitative analysis of drugs and metabolites in biological samples.

[0003] During the specific use of the combined instrument, sample injection is required. During the sample injection process, it is difficult to control the dosage, and the sample liquid needs to be premixed in advance. In view of this, a gas chromatography - mass spectrometry (GC - MS) instrument capable of controlling the sample volume is developed. Content of the Utility Model

[0004] The utility model provides a gas chromatography - mass spectrometry (GC - MS) instrument capable of controlling the sample volume, which solves the problems in the prior art that during the use of the combined instrument, sample injection is required, it is difficult to control the dosage during the sample injection process, and the sample liquid needs to be premixed in advance.

[0005] The technical solution of the utility model is as follows: It includes

[0006] A liquid inlet rack, on which a liquid inlet cover is arranged, and the bottom of the liquid inlet rack is connected to the combined instrument body;

[0007] A feed suction assembly, which is arranged on the liquid inlet rack;

[0008] A driving neutralization assembly, which is arranged on the liquid inlet cover;

[0009] The feeding and suction assembly includes a hanging rack which is arranged inside the liquid inlet rack. A suction pipe is arranged on the hanging rack, and a pump box is arranged at the end of the suction pipe. A diversion cavity is arranged inside the pump box, and a throttling cavity is arranged inside the diversion cavity. A limiting ring is arranged at the upper end inside the throttling cavity, a sealing ring is arranged at the lower end inside the throttling cavity, and a sealing ball is arranged inside the throttling cavity. A driving box is arranged inside the pump box, an output motor is arranged at the bottom of the driving box, a driving diaphragm is arranged inside the driving box, a pushing shaft is arranged inside the driving diaphragm, a driving frame is arranged at the bottom of the pushing shaft, a meshing rack is arranged on the lower end surface of the driving frame, and a driving gear is arranged at the output end of the output motor. The driving gear meshes with the meshing rack.

[0010] As a further technical solution, a sealing cavity is arranged inside the driving box. The sealing cavity is communicated with the diversion cavity, and the driving diaphragm is arranged inside the sealing cavity.

[0011] As a further technical solution, the driving and neutralizing assembly includes a telescopic oil cylinder which is arranged on the bottom surface of the liquid inlet cover. An output end of the telescopic oil cylinder is provided with a driving disk, a positioning strip is arranged on the driving disk, a limiting sliding groove is arranged on the inner surface of the liquid inlet rack, and the positioning strip is embedded in the limiting sliding groove. A driving motor is arranged at the lower end of the driving disk, the output direction of the driving motor is downward, and a stirring rod is arranged at the output end of the driving motor.

[0012] As a further technical solution, liquid inlet and outlet ports are respectively arranged at the upper and lower ends of the diversion cavity, and the liquid inlet port is communicated with the suction pipe.

[0013] As a further technical solution, a support platform is arranged at the bottom of the pump box, and the pump box is fixedly connected with the support platform by bolts.

[0014] As a further technical solution, the liquid inlet rack is assembled by four cylindrical structures, and the liquid inlet rack is fixedly connected with the liquid inlet cover by welding.

[0015] As a further technical solution, the driving diaphragm is of an arc structure, the number of the driving diaphragms is two, and the pushing shaft is located between the two driving diaphragms.

[0016] As a further technical solution, pulleys are arranged on the inner surface of the positioning strip, and the pulleys are in contact with the limiting sliding groove.

[0017] As a further technical solution, a driving sleeve is sleeved on the pushing shaft, and the driving sleeve is fixedly connected with the driving frame.

[0018] As a further technical solution, the liquid inlet cover is of a rectangular structure.

[0019] The working principle and beneficial effects of the present utility model are as follows:

[0020] In the present utility model, an output motor drives a driving gear to rotate, the driving gear drives a meshing rack to move, thereby driving two driving diaphragms to work. The driving diaphragms provide a suction force to both throttle cavities. The suction effect of the liquid is carried out through the cooperation of a sealing ball and a sealing ring. According to the rotation angle and number of turns of the driving gear, the overall flow rate of the diverted sample liquid can be calculated. Description of the Drawings

[0021] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is a cross-sectional view of the pump box of the present utility model;

[0024] Figure 3 is a cross-sectional view of the driving disc of the present utility model;

[0025] Figure 4 is the present utility model attached Figure 2 partial enlarged view of part A;

[0026] Figure 5 is an axonometric view of the feeding rack part of the present utility model;

[0027] In the figure: 1, liquid inlet rack;; 1-2, liquid inlet cover; 2, combined instrument body; 3, feeding suction assembly; 3-1, hanging rack; 3-2, suction pipe; 3-3, pump box; 3-4, diversion cavity; 3-5, throttle cavity; 3-6, limit ring; 3-7, sealing ring; 3-8, sealing ball; 3-9, drive box; 3-10, output motor; 3-11, driving diaphragm; 3-12, push shaft; 3-13, drive rack; 3-14, meshing rack; 3-15, driving gear; 3-16, sealing cavity; 4, drive neutralizing assembly; 4-1, telescopic oil cylinder; 4-2, drive disc; 4-3, positioning strip; 4-4, limit sliding groove; 4-5, drive motor; 4-6, stirring rod; 5, liquid inlet; 6, liquid outlet; 7, support platform; 8, pulley; 9, drive sleeve. Specific Embodiments

[0028] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0029] As Figures 1 - 5 shown, this embodiment proposes a gas chromatography - mass spectrometry instrument capable of controlling the sample volume, which is characterized by including

[0030] a liquid inlet rack 1, on which a liquid inlet cover 1 - 2 is arranged, and the bottom of the liquid inlet rack 1 is connected to a combined instrument body 2;

[0031] a feeding suction assembly 3, which is arranged on the liquid inlet rack 1;

[0032] a driving and neutralizing assembly 4, which is arranged on the liquid inlet cover 1 - 2;

[0033] The feeding suction assembly 3 includes a hanging rack 3 - 1, which is arranged inside the liquid inlet rack 1. A suction pipe 3 - 2 is arranged on the hanging rack 3 - 1. The end of the suction pipe 3 - 2 is provided with a pump box 3 - 3. A diversion cavity 3 - 4 is arranged inside the pump box 3 - 3. A throttling cavity 3 - 5 is arranged inside the diversion cavity 3 - 4. A limiting ring 3 - 6 is arranged at the upper end inside the throttling cavity 3 - 5. A sealing ring 3 - 7 is arranged at the lower end inside the throttling cavity 3 - 5. A sealing ball 3 - 8 is arranged inside the throttling cavity 3 - 5. A driving box 3 - 9 is arranged inside the pump box 3 - 3. An output motor 3 - 10 is arranged at the bottom of the driving box 3 - 9. A driving diaphragm 3 - 11 is arranged inside the driving box 3 - 9. A pushing shaft 3 - 12 is arranged inside the driving diaphragm 3 - 11. The bottom of the pushing shaft 3 - 12 is provided with a driving frame 3 - 13. A meshing rack 3 - 14 is arranged on the lower end face of the driving frame 3 - 13. The output end of the output motor 3 - 10 is provided with a driving gear 3 - 15, and the driving gear 3 - 15 meshes with the meshing rack 3 - 14.

[0034] In this embodiment, the hanging rack 3 - 1 is used to hang the suction pipe 3 - 2. After the output motor 3 - 10 in the driving box 3 - 9 rotates, it drives the driving gear 3 - 15 to rotate, thereby driving the meshing rack 3 - 14 to translate. When the meshing rack 3 - 14 translates, it drives the pushing shaft 3 - 12 to move, so that the driving diaphragm 3 - 11 pressurizes or decompresses the diversion cavity 3 - 4. When the diversion cavity 3 - 4 on the left is decompressed, the sealing ball 3 - 8 in the throttling cavity 3 - 5 below the left side is sucked upward, so that the sealing ball 3 - 8 disengages from the sealing ring 3 - 7, and thus the liquid is sucked into the diversion cavity 3 - 4 on the left. When the diversion cavity 3 - 4 on the left is pressurized, the sealing ball 3 - 8 in the throttling cavity 3 - 5 below the left side fits with the sealing ring 3 - 7, and the sealing ball 3 - 8 in the throttling cavity 3 - 5 above the left side is lifted, and at this time the liquid is extruded and discharged.

[0035] Specifically, a sealing cavity 3 - 16 is arranged inside the driving box 3 - 9, and the sealing cavity 3 - 16 is communicated with the diversion cavity 3 - 4, and the driving diaphragm 3 - 11 is arranged inside the sealing cavity 3 - 16.

[0036] In this embodiment, the sealing cavity 3-16 is used to drive the tympanic membrane 3-11 to be more effective when performing pressurization and decompression.

[0037] Furthermore, the driving and neutralizing assembly 4 includes a telescopic oil cylinder 4-1. The telescopic oil cylinder 4-1 is arranged on the bottom surface of the liquid inlet cover 1-2. A driving disc 4-2 is arranged at the output end of the telescopic oil cylinder 4-1. A positioning strip 4-3 is arranged on the driving disc 4-2. A limiting sliding groove 4-4 is arranged on the inner surface of the liquid inlet frame 1. The positioning strip 4-3 is embedded in the limiting sliding groove 4-4. A driving motor 4-5 is arranged at the lower end of the driving disc 4-2. The output direction of the driving motor 4-5 is downward. A stirring rod 4-6 is arranged at the output end of the driving motor 4-5.

[0038] In this embodiment, the telescopic oil cylinder 4-1 drives the driving disc 4-2 to move up and down. The driving disc 4-2 is limited by sliding in the limiting sliding groove 4-4 through the positioning strip 4-3, making the up and down movement of the driving disc 4-2 more stable. The driving motor 4-5 drives the stirring rod 4-6 to rotate. During actual use, the stirring rod 4-6 can be docked and extended to achieve a deeper stirring depth.

[0039] Furthermore, a liquid inlet 5 and a liquid outlet 6 are respectively arranged at the upper and lower ends of the diversion cavity 3-4. The liquid inlet 5 is communicated with the suction pipe 3-2. A support platform 7 is arranged at the bottom of the pump box 3-3. The pump box 3-3 is fixedly connected to the support platform 7 by bolts. The liquid inlet frame 1 is assembled by four cylindrical structures. The liquid inlet frame 1 is fixedly connected to the liquid inlet cover 1-2 by welding.

[0040] In this embodiment, the liquid inlet 5 and the liquid outlet 6 are used for the discharge and suction of the pump box 3-3. The support platform 7 is used to stably place the pump box 3-3.

[0041] Furthermore, the driving tympanic membrane 3-11 is of an arc structure. The number of the driving tympanic membranes 3-11 is two. The push shaft 3-12 is located between the two driving tympanic membranes 3-11. A pulley 8 is arranged on the inner surface of the positioning strip 4-3. The pulley 8 is in contact with the limiting sliding groove 4-4. A driving sleeve 9 is sleeved on the push shaft 3-12. The driving sleeve 9 is fixedly connected to the driving frame 3-13. The liquid inlet cover 1-2 is of a rectangular structure.

[0042] In this embodiment, the pulley 8 is used to make the positioning strip 4-3 slide more smoothly in the limiting sliding groove 4-4. The driving sleeve 9 is connected to the driving frame 3-13 to optimize the force application effect during driving.

[0043] When liquid is required for sample testing, the sample liquid is added into the liquid inlet cover 1-2. After the output motor 3-10 in the driving box 3-9 rotates, the driving gear 3-15 is driven to rotate, thereby driving the meshing rack 3-14 to translate. The meshing rack 3-14 drives the push shaft 3-12 to move during translation, thereby driving the tympanic membrane 3-11 to pressurize or depressurize the guide cavity 3-4. When the pressure in the guide cavity 3-4 on the left is reduced, the sealing ball 3-8 in the throttling cavity 3-5 at the lower left side is sucked up, so that the sealing ball 3-8 is separated from the sealing ring 3-7, thereby sucking the liquid into the guide cavity 3-4 on the left side. When the pressure in the guide cavity 3-4 on the left side is increased, the sealing ball 3-8 in the throttling cavity 3-5 at the lower left side is sucked up, so that the sealing ball 3-8 is separated from the sealing ring 3-7. 3-8 fits with the sealing ring 3-7, and the sealing ball 3-8 in the throttling chamber 3-5 on the upper left side is lifted. At this time, the liquid is squeezed out. The operating principle in the right guide chamber 3-4 and the throttling chamber 3-5 is the same as the principle in the left guide chamber 3-4 mentioned above. The bottom surface of the liquid inlet cover 1-2 has a slope, so that the liquid flows to the position of the pump box. The telescopic cylinder 4-1 drives the drive disk 4-2 to move up and down. The drive disk 4-2 slides in the limiting slide groove 4-4 through the positioning bar 4-3 to limit the position, so that the drive disk 4-2 moves up and down more stably. The driving motor 4-5 drives the stirring rod 4-6 to rotate to stir the liquid in the bottle that is about to enter the combined instrument body 2. The stirring rod 4-6 can be docked and extended to achieve more layered stirring and neutralization.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas chromatography-mass spectrometry instrument capable of controlling the sample volume, characterized in that, including a liquid inlet rack (1), a liquid inlet hood (1-2) is arranged on the liquid inlet rack (1), and the bottom of the liquid inlet rack (1) is connected to a combined instrument body (2); a feed suction assembly (3), the feed suction assembly (3) is arranged on the liquid inlet rack (1); a driving and neutralizing assembly (4), the driving and neutralizing assembly (4) is arranged on the liquid inlet hood (1-2); the feed suction assembly (3) includes a hanging rack (3-1), the hanging rack (3-1) is arranged inside the liquid inlet rack (1), a suction pipe (3-2) is arranged on the hanging rack (3-1), the end of the suction pipe (3-2) is provided with a pump box (3-3), a diversion cavity (3-4) is arranged inside the pump box (3-3), a throttling cavity (3-5) is arranged inside the diversion cavity (3-4), a limiting ring (3-6) is arranged at the upper end inside the throttling cavity (3-5), a sealing ring (3-7) is arranged at the lower end inside the throttling cavity (3-5), a sealing ball (3-8) is arranged inside the throttling cavity (3-5), a driving box (3-9) is arranged inside the pump box (3-3), an output motor (3-10) is arranged at the bottom of the driving box (3-9), a driving diaphragm (3-11) is arranged inside the driving box (3-9), a pushing shaft (3-12) is arranged inside the driving diaphragm (3-11), a driving frame (3-13) is arranged at the bottom of the pushing shaft (3-12), a meshing rack (3-14) is arranged on the lower end surface of the driving frame (3-13), an output end of the output motor (3-10) is provided with a driving gear (3-15), and the driving gear (3-15) is meshed with the meshing rack (3-14).

2. The gas chromatography-mass spectrometry instrument capable of controlling the sample amount according to claim 1, wherein, a sealing cavity (3-16) is arranged inside the driving box (3-9), the sealing cavity (3-16) is communicated with the diversion cavity (3-4), and the driving diaphragm (3-11) is arranged inside the sealing cavity (3-16).

3. The gas chromatography-mass spectrometry instrument capable of controlling the sample amount according to claim 1, wherein the driving and neutralizing assembly (4) includes a telescopic oil cylinder (4-1), the telescopic oil cylinder (4-1) is arranged on the bottom surface of the liquid inlet hood (1-2), an output end of the telescopic oil cylinder (4-1) is provided with a driving disc (4-2), a positioning strip (4-3) is arranged on the driving disc (4-2), a limiting sliding groove (4-4) is arranged on the inner surface of the liquid inlet rack (1), the positioning strip (4-3) is embedded inside the limiting sliding groove (4-4), a driving motor (4-5) is arranged at the lower end of the driving disc (4-2), the output direction of the driving motor (4-5) is downward, and an output end of the driving motor (4-5) is provided with a stirring rod (4-6).

4. A gas chromatography-mass spectrometry instrument capable of controlling the sample volume according to claim 1, characterized in that, liquid inlets (5) and liquid outlets (6) are respectively arranged at the upper and lower ends of the diversion cavity (3-4), and the liquid inlets (5) are communicated with the suction pipe (3-2).

5. The gas chromatography-mass spectrometry instrument capable of controlling the sample amount according to claim 1, characterized in that, a support platform (7) is arranged at the bottom of the pump box (3-3), and the pump box (3-3) is fixedly connected to the support platform (7) by bolts.

6. The gas chromatography-mass spectrometry instrument capable of controlling the sample amount according to claim 1, wherein, The liquid inlet rack (1) is assembled by four cylindrical structures, and the liquid inlet rack (1) is fixedly welded to the liquid inlet cover (1-2).

7. An on-line gas chromatograph-mass spectrometer capable of controlling the sample amount according to claim 1, characterized in that, The driving tympanic membrane (3-11) is of an arc structure, the number of the driving tympanic membranes (3-11) is two, and the pushing shaft (3-12) is located between the two driving tympanic membranes (3-11).

8. The gas chromatography-mass spectrometry instrument capable of controlling the sample amount according to claim 3, characterized in that, A pulley (8) is arranged on the inner surface of the positioning strip (4-3), and the pulley (8) is in contact with the limit sliding groove (4-4).

9. A gas chromatograph-mass spectrometer capable of controlling the sample volume according to claim 1, characterized in that, A driving sleeve (9) is sleeved on the pushing shaft (3-12), and the driving sleeve (9) is fixedly connected to the driving frame (3-13).

10. A gas chromatography-mass spectrometry instrument capable of controlling the sample amount according to claim 1, characterized in that, The liquid inlet cover (1-2) is of a rectangular structure.

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