Gas chromatographic column fixing device

Abstract

The utility model discloses a gas chromatographic column fixing device which comprises a fixing frame, a vacuum cavity is formed in the fixing frame, one end of the vacuum cavity is connected with a vacuum pump through a hose, a gas inlet pipe is arranged on one side of the vacuum pump, a suction nozzle is arranged at the other end of the vacuum cavity, and a gas outlet pipe is arranged at the other end of the suction nozzle. The suction nozzle is located in a groove formed in the upper surface of the fixing frame, and a chromatographic column is arranged above the suction nozzle. According to the utility model, after the fixing device is mounted on the chromatographic instrument, the chromatographic column can be placed on the fixing frame, so that the suction nozzle is attached to the chromatographic column, then the vacuum pump is started, air in the vacuum cavity is pumped away, and the electromagnetic valve is closed, so that the interior of the vacuum cavity is in a vacuum state; therefore, the chromatographic column is adsorbed and fixed on the fixing frame by using the pressure difference inside and outside the vacuum cavity, the use is convenient and fast, and the fixing and mounting efficiency of the chromatographic column is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a gas chromatograph column fixing device. Background Art

[0002] A gas chromatograph is an instrument that uses chromatographic separation and detection techniques to perform qualitative and quantitative analysis on complex multi-component mixtures. The chromatograph uses a chromatographic column to first separate the mixture, and then uses a detector to detect the separated components in sequence. The diameter of the chromatographic column is several millimeters and is filled with a solid adsorbent or a liquid solvent. The adsorbent or solvent is called the stationary phase, and the chromatographic column requires a fixing device during installation.

[0003] The existing technology has the following problems:

[0004] After searching, the announcement number is: CN220854771U A hydraulic column loading device for a chromatographic column. In the above utility model, the elasticity of the spring is used to push the clamping plate to fix the chromatographic column. As a result, when installing or removing the chromatographic column, the clamping plate needs to be pushed to one side, leaving a certain gap between the two clamping plates, which makes the operation more inconvenient.

[0005] Therefore, we proposed a gas chromatography column fixing device to solve the above-mentioned drawbacks. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of the prior art in that the clamping plate is pushed by the elasticity of the spring to fix and clamp the chromatographic column, resulting in the need to push the clamping plate to one side when installing or removing the chromatographic column, leaving a certain gap between the two clamping plates, which is inconvenient to operate. A gas chromatography column fixing device is proposed to solve the shortcomings of the prior art in that the clamping plate is pushed to the side when installing or removing the chromatographic column, leaving a certain gap between the two clamping plates, and the operation is inconvenient.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A gas chromatography column fixing device comprises a fixing frame, a vacuum chamber is defined inside the fixing frame, one end of the vacuum chamber is connected to a vacuum pump via a hose, an air inlet pipe is provided on one side of the vacuum pump, a suction nozzle is provided at the other end of the vacuum chamber, the suction nozzle is located in a groove defined in the upper surface of the fixing frame, a chromatographic column is provided above the suction nozzle, and a solenoid valve is provided inside the vacuum chamber.

[0009] Preferably, a pressure gauge is provided on the side surface of the fixing frame, and an end of the pressure gauge passes through and extends into the vacuum chamber.

[0010] Preferably, the suction nozzle is fixedly connected to the fixing frame by an adhesive.

[0011] Preferably, the suction nozzle is made of rubber.

[0012] Preferably, a fixing foot is provided on the lower surface of the fixing frame, and a through hole is opened on the surface of the fixing foot.

[0013] Preferably, the vacuum pump, solenoid valve and pressure gauge are all connected to a control panel via wires.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) In the present invention, after the fixing device is installed on the chromatograph, the chromatographic column can be placed on the fixing frame so that the suction nozzle fits the chromatographic column. Then, the vacuum pump is started to extract the air in the vacuum chamber, and the solenoid valve is closed so that the interior of the vacuum chamber is in a vacuum state. The pressure difference between the inside and outside of the vacuum chamber is utilized to adsorb and fix the chromatographic column on the fixing frame. The use is convenient and quick, and the fixing and installation efficiency of the chromatographic column is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments.

[0017] Figure 1 This is a structural schematic diagram of a gas chromatography column fixing device proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a fixing frame of a gas chromatography column fixing device proposed in the present invention;

[0019] Figure 3 This is a structural schematic diagram of position A of a gas chromatography column fixing device proposed in the present invention.

[0020] Legend:

[0021] 1. Fixed bracket; 2. Fixed legs; 3. Vacuum pump; 4. Solenoid valve; 5. Pressure gauge; 6. Inlet pipe; 7. Vacuum chamber; 8. Suction nozzle; 9. Chromatographic column; 10. Control panel. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0023] Please refer to Figure 1-3A gas chromatography column fixing device includes a fixing frame 1, a vacuum chamber 7 is opened inside the fixing frame 1, one end of the vacuum chamber 7 is connected to a vacuum pump 3 through a hose, and an air inlet pipe 6 is provided on one side of the vacuum pump 3, and a suction nozzle 8 is provided at the other end of the vacuum chamber 7. The suction nozzle 8 is located in a groove opened on the upper surface of the fixing frame 1, a chromatographic column 9 is provided above the suction nozzle 8, and an electromagnetic valve 4 is provided inside the vacuum chamber 7.

[0024] In this embodiment, after the fixing device is installed on the chromatograph, the chromatographic column 9 can be placed on the fixing frame 1 so that the suction nozzle 8 fits the chromatographic column 9. Then, the vacuum pump 3 is started to extract the air in the vacuum chamber 7, and the solenoid valve 4 is closed to put the interior of the vacuum chamber 7 into a vacuum state. The pressure difference between the inside and outside of the vacuum chamber 7 is utilized to adsorb and fix the chromatographic column 9 on the fixing frame 1. It is convenient and quick to use, and greatly improves the efficiency of fixing and installing the chromatographic column 9.

[0025] Specifically, a pressure gauge 5 is provided on the side surface of the fixing frame 1 , and an end of the pressure gauge 5 passes through and extends into the vacuum chamber 7 .

[0026] In this embodiment, the pressure gauge 5 is used to understand the pressure change in the vacuum chamber 7 so as to perform appropriate vacuum adsorption on the chromatographic column 9 .

[0027] Specifically, the suction nozzle 8 is fixedly connected to the fixing frame 1 through an adhesive.

[0028] In this embodiment, the connection density between the suction nozzle 8 and the fixing frame 1 is greatly increased to avoid air leakage.

[0029] Specifically, the suction nozzle 8 is made of rubber.

[0030] In this embodiment, it can better fit with the chromatographic column 9 to avoid air leakage.

[0031] Specifically, a fixing leg 2 is provided on the lower surface of the fixing frame 1 , and a through hole is opened on the surface of the fixing leg 2 .

[0032] In this embodiment, by providing a fixing leg 2 and using screws to pass through the through hole of the fixing leg 2 to fix it to the chromatograph device, the installation of the fixing device is completed.

[0033] Specifically, the vacuum pump 3 , the solenoid valve 4 and the pressure gauge 5 are all connected to the control panel 10 via wires.

[0034] In this embodiment: through the control panel 10, the staff can directly control the vacuum pump 3, the solenoid valve 4 and the pressure gauge 5. The control circuit of the control panel 10 can be realized by simple programming by technicians in this field. It is common knowledge in this field and is only used without modification. Therefore, the control method and circuit connection will not be described in detail.

[0035] Working principle: After installing the fixing device on the chromatograph, the chromatographic column 9 can be placed on the fixing frame 1 so that the suction nozzle 8 fits the chromatographic column 9, and then the vacuum pump 3 is started to extract the air in the vacuum chamber 7, and the solenoid valve 4 is closed to make the interior of the vacuum chamber 7 a vacuum state, thereby utilizing the pressure difference between the inside and outside of the vacuum chamber 7 to adsorb and fix the chromatographic column 9 on the fixing frame 1. It is convenient and quick to use, and greatly improves the efficiency of fixing and installing the chromatographic column 9.

[0036] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A gas chromatography column fixing device, comprising a fixing frame (1), characterized in that: A vacuum chamber (7) is provided inside the fixing frame (1), one end of the vacuum chamber (7) is connected to a vacuum pump (3) via a hose, and an air inlet pipe (6) is provided on one side of the vacuum pump (3), a suction nozzle (8) is provided at the other end of the vacuum chamber (7), the suction nozzle (8) is located in a groove provided on the upper surface of the fixing frame (1), a chromatographic column (9) is provided above the suction nozzle (8), and a solenoid valve (4) is provided inside the vacuum chamber (7).

2. A gas chromatography column fixing device according to claim 1, characterized in that: A pressure gauge (5) is provided on the side surface of the fixing frame (1), and an end of the pressure gauge (5) passes through and extends into the vacuum chamber (7).

3. A gas chromatography column fixing device according to claim 1, characterized in that: The suction nozzle (8) is fixedly connected to the fixing frame (1) via an adhesive.

4. A gas chromatography column fixing device according to claim 1, characterized in that: The suction nozzle (8) is made of rubber.

5. A gas chromatography column fixing device according to claim 1, characterized in that: The lower surface of the fixing frame (1) is provided with a fixing leg (2), and a through hole is opened on the surface of the fixing leg (2).

6. A gas chromatography column fixing device according to claim 2, characterized in that: The vacuum pump (3), the electromagnetic valve (4) and the pressure gauge (5) are all connected to a control panel (10) via wires.

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