Emptying-free mass spectrum interface

Abstract

The utility model discloses an emptying-free mass spectrum interface, which comprises a connecting seat, a connecting rod and a connecting rod, one end of the communicating mechanism is in threaded connection with one side of the connecting seat; the movable communicating vessel is in threaded penetrating connection with the bottom of the connecting seat; the top of the movable communicating vessel is connected with an air resistor, the air resistor is movably arranged in the cavity and used for blocking the inner cavity of the communicating mechanism, and the top of the air resistor is connected with a spring. According to the utility model, the arrangement mode that the communication mechanism is matched with the movable communicating vessel is utilized, and the orifice of the communication mechanism is blocked by the gas barrier, so that the possibility of gas inflow is avoided, and the movable communicating vessel can be replaced under the condition that the movable communicating vessel does not need to be detached; according to the connector, the flow speed entering the vacuum pump is limited to be lower than the maximum pumping rate through the air resistor, so that air is prevented from being introduced, the high-vacuum state of the vacuum cavity is kept, and when the movable communicating vessel is installed, the flow speed of air entering the vacuum cavity is limited.

Description

Technical Field

[0001] This utility model relates to the field of mass spectrometers, and in particular to a non-venting mass spectrometer interface. Background Technology

[0002] Gas chromatography-mass spectrometry (GC-MS) is a type of mass spectrometer used in medicine and physics. In GC, the mobile phase is an inert gas, while in gas-solid chromatography, an adsorbent with a large surface area and certain activity serves as the stationary phase. When a multi-component mixed sample enters the chromatographic column, the adsorption forces of the adsorbent on each component differ, resulting in varying velocity profiles of the components within the column over time. Components with weaker adsorption forces are more easily desorbed and exit the column first, reaching the detector, while components with the strongest adsorption forces are least likely to desorb and exit last. In this way, the components are separated within the column and sequentially detected and recorded by the detector.

[0003] When replacing a traditional mass spectrometry interface, the chromatographic column needs to be removed before a new column can be installed. This process requires purging the vacuum chamber, which wastes time and can easily lead to inaccurate analytical results. Utility Model Content

[0004] The purpose of this invention is to provide a non-venting mass spectrometry interface to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a venting-free mass spectrometry interface, comprising:

[0006] The connector has an internal cavity.

[0007] A connecting mechanism, one end of which is threadedly connected to one side of the connecting seat;

[0008] A movable communicating vessel, which is threadedly connected to the bottom of the connecting seat;

[0009] The top of the movable communicating vessel is connected to an airlock, which is movably disposed inside the cavity. The airlock is used to seal the inner cavity of the communicating mechanism, and a spring is connected to the top of the airlock.

[0010] Preferably, a first threaded groove is provided on one side of the connecting seat, and a second threaded groove is provided on the bottom of the connecting seat. Both the first threaded groove and the second threaded groove communicate with the inner cavity of the cavity.

[0011] Preferably, the communication mechanism includes a communication pipe and a threaded connector, the threaded connector being connected to one end of the communication pipe and the threaded connector engaging with the inner cavity of the first threaded groove.

[0012] Preferably, the movable communicating vessel includes a threaded chromatographic column and a communicating slider. The threaded chromatographic column is threadedly connected to the inner cavity of the second threaded groove, the communicating slider is slidably disposed inside the cavity, and the end of the threaded chromatographic column is rotatably connected to the communicating slider.

[0013] Preferably, the movable communicating vessel further includes a sealing component, which is fitted onto the connection between the threaded chromatographic column and the communicating slider.

[0014] Preferably, the bottom of the connecting slider is provided with a circular hole, the top of the threaded chromatographic column is rotatably inserted into the inner cavity of the circular hole, an annular groove is provided on the inner wall of the circular hole, and the sealing assembly is disposed inside the annular groove.

[0015] Preferably, the sealing assembly includes a rotating ring, a first sealing ring, and a second sealing ring. The rotating ring is fixedly sleeved on the top of the threaded chromatographic column and cooperates with the inner cavity of the annular groove. The first sealing ring is fixedly sleeved on the outside of the rotating ring. The two second sealing rings are respectively staggered at the top and bottom of the first sealing ring and are fixedly connected to the inner wall of the annular groove.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] This invention utilizes a combination of a connecting mechanism and a movable connector. By blocking the opening of the connecting mechanism with an air block, the possibility of gas inflow is prevented. The movable connector can be replaced without removing it. The interface limits the flow rate into the vacuum pump to below its maximum pumping rate through air resistance, thereby preventing the introduction of air and maintaining a high vacuum state in the vacuum chamber. When the movable connector is installed, the air resistance is opened to allow the gas channel to directly enter the vacuum channel. When the movable connector is removed, the flow rate of gas entering the vacuum chamber is restricted. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the connector of this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the movable communicating vessel of this utility model.

[0021] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Connecting seat; 2. Connecting mechanism; 21. Connecting pipe; 22. Threaded connector; 3. Movable communicating vessel; 31. Threaded chromatographic column; 32. Connecting slider; 33. Sealing assembly; 331. Rotating ring; 332. First sealing ring; 333. Second sealing ring; 4. Gas resistance; 5. Spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides, for example Figure 1-4 The ventless mass spectrometry interface shown includes:

[0025] Connector 1 has an internal cavity;

[0026] The connecting mechanism 2 has one end threadedly connected to one side of the connecting seat 1;

[0027] The movable communicating vessel 3 is threadedly connected to the bottom of the connecting seat 1, causing the threaded chromatographic column 31 to rotate. Through the threaded insertion between the threaded chromatographic column 31 and the second threaded groove, the rotation of the threaded chromatographic column 31 pushes the communicating slider 32, allowing it to slide vertically within the cavity. As it approaches the communicating mechanism 2, the gas resistance 4 also moves until the communicating slider 32 rises to a position corresponding to the opening of the communicating mechanism 2. At this point, the gas resistance 4 no longer blocks the opening of the communicating mechanism 2, and the inner cavity between the communicating mechanism 2 and the movable communicating vessel 3 is connected, allowing air to enter the vacuum channel until the gas in the gas resistance 4 is completely evacuated, achieving a vacuum state. When replacing the movable connector 3, simply remove the movable connector 3. The air resistance will then decrease under the elastic support of the spring 5. The air resistance 4 blocks the opening of the connecting mechanism 2, thus preventing the possibility of gas inflow. In this way, even during the replacement of the movable connector 3, the vacuum state of the system can be maintained. The movable connector 3 can be replaced without removing it. The interface limits the flow rate into the vacuum pump to below its maximum pumping rate through the air resistance 4, thereby preventing the introduction of air and maintaining the high vacuum state of the vacuum chamber. When the movable connector 3 is installed, the air resistance 4 is pushed open so that the gas passage can directly enter the vacuum passage. When the movable connector 3 is removed, the flow rate of gas entering the vacuum chamber is limited.

[0028] The top of the movable communicating vessel 3 is connected to an air lock 4, which is movably disposed inside the cavity. The air lock 4 is used to seal the inner cavity of the communicating mechanism 2. The top of the air lock 4 is connected to a spring 5, which facilitates the elastic support of the air lock 4 so as to reset the air lock 4 downward. A first threaded groove is provided on one side of the connecting seat 1, and a second threaded groove is provided on the bottom of the connecting seat 1. Both the first threaded groove and the second threaded groove are connected to the inner cavity of the cavity.

[0029] Furthermore, the connecting mechanism 2 includes a connecting pipe 21 and a threaded connector 22. The threaded connector 22 is connected to one end of the connecting pipe 21 and is threadedly engaged with the inner cavity of the first threaded groove. The threaded connector 22 facilitates the installation of the relative position between the connecting pipe 21 and the connecting seat 1.

[0030] Furthermore, the movable communicating vessel 3 includes a threaded chromatographic column 31 and a communicating slider 32. The threaded chromatographic column 31 is threadedly connected to the inner cavity of the second threaded groove. The communicating slider 32 is slidably disposed inside the cavity. The end of the threaded chromatographic column 31 is rotatably connected to the communicating slider 32. The movable communicating vessel 3 also includes a sealing component 33, which is sleeved at the connection between the threaded chromatographic column 31 and the communicating slider 32. A circular hole is provided at the bottom of the communicating slider 32. The top of the threaded chromatographic column 31 is rotatably connected to the inner cavity of the circular hole. An annular groove is provided on the inner wall of the circular hole. The sealing component 33 is disposed inside the annular groove. The misalignment between the first sealing ring 332 and the second sealing ring 333 facilitates the increase of the sealing performance of the rotating ring 331 rotating in the inner cavity of the annular groove. The annular groove provides rotation space for the rotating ring 331 to rotate, so that the threaded chromatographic column 31 can rotate relative to the communicating slider 32.

[0031] Furthermore, the sealing assembly 33 includes a rotating ring 331, a first sealing ring 332, and a second sealing ring 333. The rotating ring 331 is fixedly sleeved on the top of the threaded chromatographic column 31 and cooperates with the inner cavity of the annular groove. The first sealing ring 332 is fixedly sleeved on the outside of the rotating ring 331. The two second sealing rings 333 are respectively staggered at the top and bottom of the first sealing ring 332 and are fixedly connected to the inner wall of the annular groove.

[0032] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. Non-venting mass spectrometry interface, including: The connecting seat (1) has a cavity inside; The connecting mechanism (2) has one end threadedly connected to one side of the connecting seat (1); The movable connector (3) is threadedly connected to the bottom of the connector (1); The feature is that: the top of the movable communicating vessel (3) is connected to an air resistance (4), the air resistance (4) is movably disposed inside the cavity, the air resistance (4) is used to block the cavity of the communicating mechanism (2), and the top of the air resistance (4) is connected to a spring (5). The movable communicating vessel (3) includes a threaded chromatographic column (31) and a communicating slider (32). The threaded chromatographic column (31) is threadedly connected to the inner cavity of the second threaded groove. The communicating slider (32) is slidably disposed inside the cavity. The end of the threaded chromatographic column (31) is rotatably connected to the communicating slider (32).

2. The non-venting mass spectrometry interface according to claim 1, characterized in that, The connecting seat (1) has a first threaded groove on one side and a second threaded groove on the bottom. Both the first threaded groove and the second threaded groove are connected to the inner cavity of the cavity.

3. The non-venting mass spectrometry interface according to claim 1, characterized in that, The connecting mechanism (2) includes a connecting pipe (21) and a threaded connector (22). The threaded connector (22) is connected to one end of the connecting pipe (21) and the threaded connector (22) is threaded into the inner cavity of the first threaded groove.

4. The non-venting mass spectrometry interface according to claim 1, characterized in that, The movable communication device (3) also includes a sealing component (33), which is fitted at the connection between the threaded chromatographic column (31) and the communication slider (32).

5. The non-venting mass spectrometry interface according to claim 4, characterized in that, The bottom of the connecting slider (32) is provided with a circular hole, the top of the threaded chromatographic column (31) is rotatably inserted into the inner cavity of the circular hole, an annular groove is provided on the inner wall of the circular hole, and the sealing component (33) is disposed inside the annular groove.

6. The non-venting mass spectrometry interface according to claim 4, characterized in that, The sealing assembly (33) includes a rotating ring (331), a first sealing ring (332), and a second sealing ring (333). The rotating ring (331) is fixedly sleeved on the top of the threaded chromatographic column (31). The rotating ring (331) cooperates with the inner cavity of the annular groove. The first sealing ring (332) is fixedly sleeved on the outside of the rotating ring (331). The two second sealing rings (333) are respectively staggered at the top and bottom of the first sealing ring (332). The second sealing rings (333) are fixedly connected to the inner wall of the annular groove.

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