Mass spectrometer vacuum pump and chamber connection leak-proof pipe device

Abstract

The utility model discloses mass spectrometer vacuum pump and cavity connection prevent leakage pipeline device, specifically related to pipeline connection technical field, including first connecting disc, be provided with connecting assembly on the first connecting disc, the connecting assembly includes the second connecting disc of setting in the first connecting disc top, the first connecting disc and second connecting disc between form has installation cavity, and install the lining sealing disc in the cavity, the top and bottom of lining sealing disc are provided with elastic sealing baffle ring respectively. The utility model discloses through the cooperation of elastic sealing baffle ring and washer, forms initial sealing in the connecting disc gap, and the middle elastic baffle disc realizes one -way sealing by means of staggered notch structure, and when the reverse infiltration of external gas is automatic closed. Double -layer sealing structure accurate solution existing pipeline tiny leakage leads to the problem of insufficient vacuum degree, provides stable vacuum condition for mass spectrum analysis.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and more specifically, to a leak-proof pipeline device for connecting a mass spectrometer vacuum pump to its cavity. Background Technology

[0002] The vacuum pump in a mass spectrometer is a key device that provides and maintains an extremely high vacuum environment for the core component of the mass spectrometer, the analytical chamber. It is not a single type of pump, but rather a "vacuum unit" usually composed of multiple vacuum pumps. Its core function is to continuously remove gas molecules from the analytical chamber to create vacuum conditions that meet the requirements of mass spectrometry analysis.

[0003] The detection performance of a mass spectrometer is positively correlated with the vacuum level within its chamber. Even a minor leak in the piping allows outside air to continuously seep into the chamber, preventing the vacuum pump from maintaining the vacuum level within the target range. Insufficient vacuum immediately leads to issues such as ion collisions and background noise, directly causing inaccurate detection results, a significant decrease in sensitivity, or even the inability to complete the detection. Organic pollutants and dust in the outside air can enter the chamber through the leak and be ionized, forming "interference peaks" that overlap with the sample ion signals. These interference peaks may be misidentified as sample components, resulting in false positives and severely impacting the reliability of the analysis. Therefore, a leak-proof piping device for connecting the mass spectrometer vacuum pump to the chamber is provided. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a leak-proof pipeline device for connecting the vacuum pump and the cavity of a mass spectrometer, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a leak-proof pipeline device for connecting a mass spectrometer vacuum pump and a cavity, including a first connecting plate, on which a connecting component is provided;

[0006] The connecting assembly includes a second connecting plate disposed on top of the first connecting plate, an installation cavity is formed between the first connecting plate and the second connecting plate, and an inner sealing plate is disposed in the installation cavity, with elastic sealing rings disposed at the top and bottom of the inner sealing plate respectively.

[0007] An elastic baffle is provided in the middle of the inner sealing disc. The elastic baffle has several staggered slots in the middle so that the elastic baffle can be opened through the staggered slots when subjected to pressure. Gaskets are provided at the top of the first connecting disc and the bottom of the second connecting disc, and each gasket is located in the middle of the elastic sealing baffle.

[0008] Optionally, in a possible implementation, a filter screen cylinder is provided on the top of the second connecting plate, the filter screen cylinder and the inner lining sealing plate are in the same axial direction, a gathering cover is provided on the outer side of the filter screen cylinder, the bottom end of the gathering cover is fixed on the second connecting plate, a discharge nozzle is provided on the top of the gathering cover, the discharge nozzle is fixed on the gathering cover, and the shape of the discharge nozzle is set as a frustum, a plurality of support rods are distributed on the inner wall of the discharge nozzle, and one end of each support rod extends to the second connecting plate, a connecting pipe is provided on the side of the first connecting plate away from the second connecting plate, and the first connecting plate and the second connecting plate are detachably connected by bolts;

[0009] The technical effects and advantages of this utility model are as follows:

[0010] The initial seal is formed in the gap of the connecting plate through the cooperation of the elastic sealing ring and the gasket; the central elastic baffle achieves one-way sealing through the staggered groove structure, and automatically closes when external gas seeps in from the opposite direction. The double sealing structure precisely solves the problem of insufficient vacuum caused by minor leaks in existing pipelines, providing stable vacuum conditions for mass spectrometry analysis;

[0011] The sealed structure effectively blocks outside air and its organic pollutants and dust from entering the cavity, preventing such impurities from ionizing and forming interference peaks. This solves the problems of false positives and inaccurate results caused by existing leaks, and enhances the reliability of the analysis.

[0012] Furthermore, the filter screen can intercept impurity particles in the gas, preventing them from entering the vacuum pump and causing wear; the gathering hood and the frustum-shaped discharge nozzle form a flow channel, improving pumping efficiency, while the support rod strengthens the structural stability, solving the problem of existing devices lacking protection and easily affecting the life of the vacuum pump. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0014] Figure 1 This is a front view of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the gathering cover, support rod, filter cylinder and second connecting plate of this utility model.

[0016] Figure 3This is a schematic diagram of the first connecting disc, inner sealing disc, elastic baffle, elastic sealing ring, and connecting pipe of this utility model.

[0017] Figure 4 This is a schematic diagram of the inner sealing disc, the first connecting disc, the elastic sealing ring, the gasket, and the connecting pipe of this utility model.

[0018] The attached figures are labeled as follows: 1. First connecting disc; 2. Second connecting disc; 3. Inner liner sealing disc; 4. Elastic sealing ring; 5. Elastic baffle; 6. Misaligned groove; 7. Gasket; 8. Filter screen cylinder; 9. Gathering cover; 10. Support rod; 11. Connecting pipe; 12. Discharge nozzle. 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. 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.

[0020] This embodiment discloses a leak-proof pipeline device for connecting the vacuum pump and the cavity of a mass spectrometer, which aims to solve the problem that the pipeline connecting the vacuum pump and the cavity of a mass spectrometer is prone to leakage in the prior art, resulting in insufficient vacuum in the cavity, inaccurate detection results, and the presence of interference peaks.

[0021] Specifically, the device includes a first connecting plate 1, on which a connecting assembly is mounted. The connecting assembly includes a second connecting plate 2 located on top of the first connecting plate 1. The first connecting plate 1 and the second connecting plate 2 are detachably connected by bolts, which facilitates the installation, disassembly, and subsequent maintenance of the device. An installation cavity is formed between the first connecting plate 1 and the second connecting plate 2. An inner sealing plate 3 is installed inside the installation cavity. Elastic sealing rings 4 are respectively installed at the top and bottom of the inner sealing plate 3. The elastic sealing rings 4 are made of aging-resistant and highly sealing rubber material, which can effectively fill the gap between the inner sealing plate 3 and the connecting plate.

[0022] Washers 7 are respectively provided on the top of the first connecting plate 1 and the bottom of the second connecting plate 2. Each washer 7 is located in the middle of the elastic sealing ring 4. The washer 7 is made of metal. When the bolts are tightened to the first connecting plate 1 and the second connecting plate 2, they can form a uniform squeezing force on the elastic sealing ring 4, causing the elastic sealing ring 4 to deform and fit tightly between the connecting surfaces, further enhancing the sealing effect and preventing gas from leaking from the gaps in the connecting plates.

[0023] An elastic baffle 5 is provided in the middle of the inner sealing disc 3, as shown in the attached figure. Figure 3As shown, the elastic baffle 5 has several staggered slots 6 in the middle. The staggered slots 6 are evenly distributed radially, and there is a certain angle difference between adjacent slots. This structural design allows the elastic baffle 5 to open to one side through the staggered slots 6 when subjected to the pressure generated by the vacuum pump, ensuring that the gas can pass through smoothly. When the pipeline leaks and external gas attempts to seep in from the opposite direction, the elastic baffle 5 will close tightly under the action of the internal and external pressure difference, forming a one-way seal and effectively preventing external gas from entering the cavity.

[0024] A connecting pipe 11 is provided on the side of the first connecting plate 1 away from the second connecting plate 2. The connecting pipe 11 is welded and fixed to the first connecting plate 1. The connecting pipe 11 is used to achieve precise docking with the cavity pipe of the mass spectrometer. Its pipe diameter matches the diameter of the cavity pipe to ensure smooth gas flow.

[0025] As attached Figure 1 and appendix Figure 2 As shown, a filter screen cylinder 8 is provided on the top of the second connecting plate 2. The filter screen cylinder 8 and the inner lining sealing plate 3 are on the same axial direction. The side wall of the filter screen cylinder 8 is distributed with fine filter holes, which can perform preliminary filtration of the gas entering the vacuum pump, intercepting particulate matter such as dust and impurities contained in the gas, and preventing impurities from entering the vacuum pump and causing equipment wear or failure.

[0026] The outer side of the filter cylinder 8 is equipped with a converging hood 9. The bottom end of the converging hood 9 is fixed to the second connecting plate 2 by welding. The converging hood 9 has a tapered structure that tapers at the top, which can gather and guide the gas, accelerate the gas flow speed, and improve the pumping efficiency. The top of the converging hood 9 is equipped with a discharge nozzle 12, which is fixed to the converging hood 9 by welding. The discharge nozzle 12 is shaped like a frustum, and its small-diameter end is used to connect to the air inlet pipe of the vacuum pump. The frustum-shaped structure facilitates a smooth gas transition and reduces resistance during gas flow.

[0027] The inner wall of the discharge nozzle 12 is provided with several support rods 10. Each support rod 10 is evenly distributed in a circle, and one end of each support rod 10 extends to the second connecting plate 2 by welding. The support rods 10 are metal rods, which can support and reinforce the gathering cover 9 and the discharge nozzle 12, enhance the overall structural stability of the device, and prevent the gathering cover 9 or the discharge nozzle 12 from deforming due to gas pressure during long-term use.

[0028] The specific working principle is as follows: When installing the device, the connecting pipe 11 on the first connecting plate 1 is connected and fixed to the mass spectrometer cavity pipe, and the discharge nozzle 12 is connected to the vacuum pump inlet pipe. Then, the first connecting plate 1 and the second connecting plate 2 are tightened with bolts. During this process, the gasket 7 squeezes the elastic sealing ring 4, making it fit tightly between the connecting surfaces to form the first sealing line.

[0029] When the vacuum pump starts pumping air, the gas in the cavity enters the first connecting plate 1 through the connecting pipe 11 in sequence. The gas pressure acts on the elastic baffle 5, causing the elastic baffle 5 to open along the misaligned groove 6. The gas smoothly passes through the inner lining sealing plate 3 and enters the second connecting plate 2. Then, it is filtered by the filter screen 8, which intercepts the impurity particles. The filtered gas is then guided by the gathering hood 9 and enters the vacuum pump through the discharge nozzle 12 to be pumped out.

[0030] If a minor leak occurs at the pipe connection, and external gas attempts to seep back into the cavity, the elastic baffle 5 quickly closes under the pressure difference between the inside and outside, blocking the seepage path of the external gas. At the same time, the elastic sealing ring 4 further prevents gas leakage. This double-sealing structure effectively ensures the sealing of the pipe connection. In addition, the filter screen 8 prevents impurities from entering the vacuum pump, extending the service life of the equipment, while the gathering cover 9 and support rod 10 improve the pumping efficiency and structural stability of the device.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A leak-proof piping device for connecting the vacuum pump and the cavity of a mass spectrometer, comprising a first connecting plate (1), characterized in that: A connecting component is provided on the first connecting plate (1); the connecting component includes a second connecting plate (2) provided on the top of the first connecting plate (1), an installation cavity is formed between the first connecting plate (1) and the second connecting plate (2), and an inner sealing plate (3) is provided in the installation cavity. An elastic sealing ring (4) is provided on the top and bottom of the inner sealing plate (3); an elastic baffle (5) is provided in the middle of the inner sealing plate (3), and a plurality of misaligned slots (6) are provided in the middle of the elastic baffle (5) so that the elastic baffle (5) can be opened through the misaligned slots (6) under pressure. A gasket (7) is provided on the top of the first connecting plate (1) and the bottom of the second connecting plate (2), and each gasket (7) is located in the middle of the elastic sealing ring (4).

2. The anti-leakage pipeline device for connecting the mass spectrometer vacuum pump and the cavity according to claim 1, characterized in that: The top of the second connecting plate (2) is provided with a filter cylinder (8), and the filter cylinder (8) and the inner lining sealing plate (3) are in the same axial direction.

3. The anti-leakage pipeline device for connecting the mass spectrometer vacuum pump and the cavity according to claim 2, characterized in that: The filter cylinder (8) is covered with a gathering cover (9) on its outer side, and the bottom end of the gathering cover (9) is fixed on the second connecting plate (2).

4. The anti-leakage pipeline device for connecting the mass spectrometer vacuum pump and the cavity according to claim 3, characterized in that: The top of the gathering cover (9) is provided with a discharge nozzle (12), which is fixed on the gathering cover (9) and the shape of the discharge nozzle (12) is set as a frustum.

5. The anti-leakage pipeline device for connecting the mass spectrometer vacuum pump and the cavity according to claim 4, characterized in that: The inner wall of the discharge nozzle (12) is provided with a number of support rods (10), and one end of each support rod (10) extends to the second connecting plate (2).

6. The anti-leakage pipeline device for connecting the mass spectrometer vacuum pump and the cavity according to claim 1, characterized in that: The first connecting plate (1) is provided with a connecting pipe (11) on the side away from the second connecting plate (2), and the first connecting plate (1) and the second connecting plate (2) are detachably connected by bolts.

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