Sealed sample introduction mechanism of gas chromatograph-mass spectrometer

Abstract

The utility model discloses a gas chromatograph-mass spectrometer sealed sample introduction mechanism which comprises a sample introduction pipe, the sample introduction pipe comprises a gas outlet pipe and a pipe jacking part, the pipe jacking part is arranged on the upper end face of the gas outlet pipe, the pipe jacking part is fixedly connected with the gas outlet pipe, the pipe jacking part is sleeved with a gas injection pipe, and the gas injection pipe is in sealed sliding connection with the pipe jacking part. According to the utility model, the gas injection pipe which can be movably adjusted is arranged on the sample injection pipe, and the gas injection pipe is designed into a structure that the two half pipes are buckled, so that the gas injection pipe can be quickly connected during installation; through the arrangement of a first sealing ring, a second sealing ring and a sealing strip, stable sealing connection between the gas injection pipe and the sample injection pipe can be ensured, so that the height of the gas injection pipe can be flexibly adjusted during gas inlet operation, and better matching and rotary connection between the connecting pipe and external sample supply equipment are facilitated; the device has the advantages of convenient adjustment and easy installation.

Description

Technical Field

[0001] The utility model relates to the technical field of sample injection mechanisms, in particular to a sealed sample injection mechanism for a gas chromatograph-mass spectrometer. Background Art

[0002] A mass spectrometer is an instrument for separating and detecting different isotopes. It is one of the important tools for understanding the structure of organic matter and is widely used in fields such as pharmaceuticals and food. The injection mechanism on a mass spectrometer is a structure used for gas intake.

[0003] The existing Chinese patent with publication number CN116359411A discloses a sealed injection mechanism for a gas chromatograph-mass spectrometer, which relates to the technical field of gas chromatograph-mass spectrometer, and includes a connecting pipe, a sample injection tube is arranged on the side of the connecting pipe, and a limiting mechanism is installed between the connecting pipe and the sample injection tube. On the basis of the existing technology, the sealed connection structure of the connecting pipe and the sample injection tube is optimized and adjusted, and two insertion rods are correspondingly inserted into two limiting plates to realize the preliminary docking between the connecting pipe and the sample injection tube.

[0004] With respect to the above-mentioned related technologies, it is found that although the above-mentioned mass spectrometer injection mechanism can be used in a sealed manner, it is not convenient to adjust the injection height and angle during use, so the installation of the air intake is not flexible enough when used. Utility Model Content

[0005] The present application provides a sealed sample injection mechanism for a gas chromatography-mass spectrometry instrument, which is used to solve the problems raised in the background technology.

[0006] The utility model is achieved in this way:

[0007] A sealed sample injection mechanism for a gas chromatograph-mass spectrometer comprises a sample injection tube, wherein the sample injection tube comprises an air outlet pipe and a top pipe portion, wherein the top pipe portion is arranged on the upper end surface of the air outlet pipe and is fixedly connected to the air outlet pipe, wherein an air injection tube is sleeved on the top pipe portion and is sealed and slidably connected to the top pipe portion, and the air injection tube consists of two relatively buckled half pipes, which are fixedly connected by bolts.

[0008] Furthermore, a limiting ring is provided at the head of the top pipe portion, and the limiting ring is integrally formed with the top pipe portion.

[0009] Furthermore, a first sealing groove is formed on the outer side surface of the limiting ring, and a matching first sealing ring is installed in the first sealing groove.

[0010] Furthermore, the half tube includes a top shell portion, a middle shell portion and a bottom shell portion, wherein the top shell portion and the bottom shell portion are arranged at two ends of the middle shell portion, and the top shell portion, the middle shell portion and the bottom shell portion are integrally formed.

[0011] Furthermore, a connecting pipe is provided on the upper end surface of the top shell portion, and the connecting pipe is integrally formed with the top shell portion.

[0012] Furthermore, connecting ear plates are symmetrically arranged on both sides of the middle shell part, and a vertical groove is also opened on the middle shell part, and a matching sealing strip is installed in the vertical groove.

[0013] Furthermore, a second sealing groove is provided on the inner side surface of the bottom shell portion, and a matching second sealing ring is installed in the second sealing groove.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model installs an movably adjustable air injection pipe on the sampling tube, and designs the air injection pipe into a structure with two half-tubes interlocking, so that it can be quickly connected during installation, and the first sealing ring, the second sealing ring and the sealing strip are arranged to ensure a stable sealed connection between the air injection pipe and the sampling tube, so that the height of the air injection pipe can be flexibly adjusted during the air intake operation, which facilitates better coordination and rotational connection between the connecting pipe and the external sample supply equipment, and has the advantages of convenient adjustment and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional diagram of the overall structure in the embodiment of the utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the exploded structure of the device shown;

[0018] Figure 3 It is a stereoscopic diagram of the sample injection tube in the embodiment of the utility model;

[0019] Figure 4 is a three-dimensional diagram of a half pipe in an embodiment of the utility model;

[0020] Figure 5 yes Figure 4 Front view of the device shown.

[0021] In the figure: 1. sample inlet tube; 11. air outlet pipe; 12. top pipe part; 121. limit ring; 122. first sealing groove; 123. first sealing ring; 2. air injection pipe; 21. half pipe; 211. top shell part; 212. middle shell part; 213. bottom shell part; 214. connecting pipe; 215. connecting ear plate; 216. vertical groove; 217. sealing strip; 218. second sealing groove; 219. second sealing ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 3 As shown, a sealed injection mechanism for a gas chromatograph-mass spectrometer includes an injection tube 1, wherein the injection tube 1 includes an air outlet pipe 11 and a top pipe portion 12, wherein the top pipe portion 12 is arranged on the upper end surface of the air outlet pipe 11, and the top pipe portion 12 is fixedly connected to the air outlet pipe 11, and an air injection pipe 2 is sleeved on the top pipe portion 12, and the air injection pipe 2 is sealed and slidably connected to the top pipe portion 12, and the air injection pipe 2 is composed of two relatively buckled half pipes 21, and the two half pipes 21 are fixedly connected by bolts. By arranging the structure of the injection tube 1, the air outlet pipe 11 can be installed in the gas chromatography-mass spectrometer when it is convenient to use, and the air injection pipe 2 can be installed through the top pipe portion 12, and by designing the air injection pipe 2 into a structure of two half pipes 21, the two half pipes 21 can be buckled on the air injection pipe 2 when it is convenient to install, and the connection and fixation are performed by bolts, so that the air injection pipe 2 and the top pipe portion 12 can be ensured to be sealed.

[0024] Reference Figure 2 and Figure 3As shown, a limiting ring 121 is provided at the head of the top tube portion 12, and the limiting ring 121 is integrally formed with the top tube portion 12. A first sealing groove 122 is provided on the outer side of the limiting ring 121, and a matching first sealing ring 123 is installed in the first sealing groove 122. The limiting ring 121 is provided at the head of the top tube portion 12, so that the gas injection pipe 2 can be matched with each other through the limiting ring 121, and the limiting ring 121 can be sealed and connected with the inner wall of the gas injection pipe 2 through the setting of the first sealing groove 122 and the first sealing ring 123.

[0025] Reference Figure 2 , Figure 4 and Figure 5 As shown, the half tube 21 includes a top shell portion 211, a middle shell portion 212 and a bottom shell portion 213. The top shell portion 211 and the bottom shell portion 213 are respectively arranged at the two ends of the middle shell portion 212, and the top shell portion 211, the middle shell portion 212 and the bottom shell portion 213 are integrally formed. A connecting pipe 214 is arranged on the upper end surface of the top shell portion 211, and the connecting pipe 214 is integrally formed with the top shell portion 211. A second sealing groove 218 is opened on the inner side surface of the bottom shell portion 213, and a matching second sealing ring 219 is installed in the second sealing groove 218. The top shell part 211 and the bottom shell part 213 are arranged at the upper and lower ends of the middle shell part 212 by setting the structure of the half-tube 21. When it is convenient to use, the connecting pipe 214 can be installed through the top shell part 211. When it is easy to use, the air supply operation can be performed through the connecting pipe 214. The arrangement of the bottom shell part 213 facilitates the matching with the outer side of the top tube part 12, and the arrangement of the second sealing groove 218 and the second sealing ring 219 increases the good sealing between the two. The middle shell part 212 is symmetrically provided with connecting ear plates 215 on both sides, and the middle shell part 212 is also provided with a vertical groove 216, and a matching sealing strip 217 is installed in the vertical groove 216. The arrangement of the connecting ear plates 215 facilitates the connection of the half-tubes 21 at both ends by bolts, and the arrangement of the vertical groove 216 and the sealing strip 217 facilitates the sealing effect between the half-tubes 21.

[0026] Working principle: When it is needed, the height of use can be adjusted by sliding the position of the gas injection pipe on the top pipe part, and the gas injection pipe can also be rotated on the top pipe part during installation, which makes it easier to connect with external sample supply equipment.

[0027] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sealed sample injection mechanism for a gas chromatography-mass spectrometer, comprising a sample injection tube (1), Features: The sample injection tube (1) comprises an air outlet pipe (11) and a top pipe portion (12); the top pipe portion (12) is arranged on the upper end surface of the air outlet pipe (11), and the top pipe portion (12) is fixedly connected to the air outlet pipe (11); an air injection pipe (2) is sleeved on the top pipe portion (12); the air injection pipe (2) is sealingly and slidably connected to the top pipe portion (12); and the air injection pipe (2) is composed of two relatively buckled half pipes (21), and the two half pipes (21) are fixedly connected by bolts.

2. A sealed sample injection mechanism for a gas chromatography-mass spectrometer according to claim 1, It is characterized in that A limiting ring (121) is provided at the head of the top tube portion (12), and the limiting ring (121) and the top tube portion (12) are integrally formed.

3. A sealed sample injection mechanism for a gas chromatography-mass spectrometer according to claim 2, It is characterized in that A first sealing groove (122) is provided on the outer side surface of the limiting ring (121), and a matching first sealing ring (123) is installed in the first sealing groove (122).

4. A sealed sample injection mechanism for a gas chromatography-mass spectrometer according to claim 3, It is characterized in that The half tube (21) comprises a top shell portion (211), a middle shell portion (212) and a bottom shell portion (213); the top shell portion (211) and the bottom shell portion (213) are respectively arranged at two ends of the middle shell portion (212); and the top shell portion (211), the middle shell portion (212) and the bottom shell portion (213) are integrally formed.

5. A sealed sample injection mechanism for a gas chromatography-mass spectrometer according to claim 4, It is characterized in that The upper end surface of the top shell portion (211) is provided with a connecting pipe (214), and the connecting pipe (214) and the top shell portion (211) are integrally formed.

6. A sealed sample injection mechanism for a gas chromatography-mass spectrometer according to claim 5, It is characterized in that Connecting ear plates (215) are symmetrically arranged on both sides of the middle shell portion (212). A vertical groove (216) is also provided on the middle shell portion (212), and a matching sealing strip (217) is installed in the vertical groove (216).

7. A sealed sample injection mechanism for a gas chromatography-mass spectrometer according to claim 6, It is characterized in that A second sealing groove (218) is provided on the inner side surface of the bottom shell portion (213), and a matching second sealing ring (219) is installed in the second sealing groove (218).

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