A gas buffer drying chamber

Abstract

The utility model relates to the technical field of gas drying, and discloses a gas buffer drying chamber, comprising a drying chamber base, the inner wall of the drying chamber base is provided with air holes, the inner cavity of the drying chamber base is sleeved with a rubber pad, the inner wall of the drying chamber base is sleeved with an inner chamber filter element, the inner wall of the drying chamber base is sleeved with a drying chamber body, the outer wall of the drying chamber body is fixedly connected with a connector, the outer wall of the drying chamber body is connected with a gas joint, and the outer wall of the drying chamber body is provided with a buffer chamber window. The gas buffer drying chamber is used by the mutual cooperation of the inner chamber filter element and the gas joint on the device, so that the airflow is diverted and filtered when it enters the device from the gas joint through the inner chamber filter element, and the elastic buffer membrane will form an effect similar to a damper, making the pulse gas entering the chamber more continuous and smooth, thereby avoiding air pressure fluctuations and affecting the detection accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of gas drying, in particular to a gas buffer drying chamber. Background Art

[0002] During the operation of the ion mobility spectrometer, the drift gas enters the ion source area after being pre-treated in the drying filter chamber. In the ion source, the sample molecules are ionized to form ions and migrate to the collector through the drift area under the action of the electric field. In order to ensure the continuous supply of drift gas and the stable operation of the system, a diaphragm air pump is generally installed at the front or rear end of the drying filter chamber. The air pump will continuously extract the drift gas to form a certain airflow. This airflow not only helps the migration of ions, but also brings the generated ions to the detector for detection. During the whole process, the drying chamber, drift gas and diaphragm pump work together to provide a stable, dry and flowing gas environment for the ion mobility spectrometer, thereby ensuring the accuracy and reliability of the analysis results.

[0003] When the existing gas buffer drying chamber device is in use, the diaphragm pump may generate certain air pressure fluctuations in the system during operation due to the working principle of the diaphragm pump. This fluctuation is caused by the reciprocating motion of the diaphragm. When the diaphragm inhales and discharges the fluid, it will affect the pressure in the system. At the same time, the uncertainty of the arrangement of the filter medium in the drying filter chamber and the structural influence of the air path and the chamber aggravate the air pressure fluctuations, thereby affecting the detection accuracy and stability. Therefore, a gas buffer drying chamber that solves the above problems is needed. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a gas buffer drying chamber, which has the advantages of eliminating air pressure, filtering water vapor and visualization, and solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical solutions: a gas buffer drying chamber, comprising a drying chamber base, the inner wall of the drying chamber base is provided with air holes, the inner cavity of the drying chamber base is sleeved with a rubber pad, the inner wall of the drying chamber base is sleeved with an in-chamber filter element, the inner wall of the drying chamber base is sleeved with a drying chamber body, the outer wall of the drying chamber body is fixedly connected with a connector, the outer wall of the drying chamber body is connected with a gas joint, the outer wall of the drying chamber body is provided with a buffer chamber window, the outer wall of the drying chamber body is provided with an installation groove, the inner wall of the buffer chamber window is placed with a buffer film, the inner wall of the installation groove is placed with an installation sealing ring, the inner wall of the drying chamber body is sleeved with a sealing cover, the inner cavity of the drying chamber body is loaded with a molecular sieve desiccant, and the inner cavity of the drying chamber body is loaded with a color-changing silica gel desiccant.

[0006] As a preferred technical solution of the utility model, the outer wall of the filter element in the bin is provided with a plurality of filter holes.

[0007] As a preferred technical solution of the utility model, the buffer film is made of polytetrafluoroethylene, and the film thickness of the buffer film is less than 1 mm.

[0008] As a preferred technical solution of the utility model, the color-changing silica gel desiccant is prepared by using fine-porous silica gel which is a highly active adsorption material, and the molecular sieve desiccant is prepared by using aluminosilicate compounds.

[0009] As a preferred technical solution of the utility model, the inner wall of the drying bin base is provided with inner teeth, and the outer wall of the connecting head is provided with outer teeth.

[0010] As a preferred technical solution of the utility model, the number of the rubber pads is two, and the two rubber pads are respectively arranged on the top of the filter element in the bin.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The gas buffer drying chamber uses the filter element in the bin and the gas joint on the device in coordination with each other, so that when the gas enters and exits the gas joint on the device, the gas needs to pass through the filter element in the bin, and the filter element in the bin on the device is used to filter the gas, so that the airflow is diverted and filtered when it passes through the filter element in the bin from the gas joint and enters the device, and the elastic buffer membrane will form a damper-like effect, making the pulse gas entering the bin more continuous and smooth, thereby avoiding pressure fluctuations that affect the detection accuracy.

[0013] 2. The gas buffer drying chamber uses the buffer film on the device and the molecular sieve desiccant and the color-changing silica gel desiccant in coordination with each other. When the molecular sieve desiccant and the color-changing silica gel desiccant on the device are filtering gas in the inner cavity of the drying chamber body, when the color of the color-changing silica gel desiccant in the device changes or after the molecular sieve desiccant has been used for a long time, the transparent buffer film can be used as a window to observe the molecular sieve desiccant and the color-changing silica gel desiccant in the device and understand the use status of the drying medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the base structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the buffer cavity window structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the filter element structure in the bin of the utility model.

[0019] In the figure: 1. Drying chamber base; 2. Air hole; 3. Rubber pad; 4. Filter element in the chamber; 5. Drying chamber body; 6. Connector; 7. Air joint; 8. Buffer chamber window; 9. Installation groove; 10. Buffer membrane; 11. Installation sealing ring; 12. Sealing cover; 13. Molecular sieve desiccant; 14. Color-changing silica gel desiccant. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0021] See also Figure 1-Figure 5 A gas buffer drying chamber comprises a drying chamber base 1, an air hole 2 is opened on the inner wall of the drying chamber base 1, a rubber pad 3 is sleeved on the inner cavity of the drying chamber base 1, an inner filter element 4 is sleeved on the inner wall of the drying chamber base 1, a drying chamber body 5 is sleeved on the inner wall of the drying chamber base 1, a connector 6 is fixedly connected to the outer wall of the drying chamber body 5, a gas joint 7 is connected to the outer wall of the drying chamber body 5, a buffer chamber window 8 is opened on the outer wall of the drying chamber body 5, an installation groove 9 is opened on the outer wall of the drying chamber body 5, a buffer film 10 is placed on the inner wall of the buffer chamber window 8, an installation sealing ring 11 is placed on the inner wall of the installation groove 9, and the inner wall of the drying chamber body 5 A sealing cover 12 is sleeved, and the inner cavity of the drying chamber body 5 is loaded with a molecular sieve desiccant 13, and the inner cavity of the drying chamber body 5 is loaded with a color-changing silica gel desiccant 14. Through the mutual cooperation of the in-chamber filter element 4 and the gas joint 7 on the device, when the gas enters and exits the gas, the gas needs to pass through the in-chamber filter element 4, and the in-chamber filter element 4 on the device is used to filter the gas, so that the airflow is diverted and filtered when it passes through the in-chamber filter element 4 from the gas joint 7 and enters the device, and then the elastic polytetrafluoroethylene film effect of the in-chamber filter element 4 and the buffer membrane 10 is used to eliminate the fluctuation of air pressure, so as to avoid the air pressure fluctuation affecting the detection accuracy.

[0022] In a preferred embodiment, the outer wall of the filter element 4 in the bin is provided with a plurality of filter holes. Due to the characteristic that the filter element 4 in the bin on the device is a new type of filter material, the filter element 4 in the bin on the device is made of multi-layer stainless steel mesh through special lamination pressing, and the filter element 4 in the bin on the device is arranged in the upper and lower parts of the molecular sieve desiccant 13, so that large particles on the device will be filtered out, and then the gas will be pumped into the device.

[0023] In a preferred embodiment, the buffer film 10 is made of polytetrafluoroethylene, and the film thickness of the buffer film 10 is less than 1 mm. Due to the characteristics of the buffer film 10 on the device being made of polytetrafluoroethylene, the buffer film 10 on the device has high transparency and high elasticity. When high-speed pulse gas passes through the inside of the drying chamber body, the buffer film 10 will form a damper-like effect to reduce the air pressure fluctuation in the gas path. The buffer film 10 is installed at the position of the buffer cavity window 8, so that the staff can observe the inside of the device from the outside.

[0024] In a preferred embodiment, the color-changing silica gel desiccant 14 is made of fine-pored silica gel, which is a highly active adsorption material, and the molecular sieve desiccant 13 is made of aluminosilicate compounds. Through the characteristics of the materials of the color-changing silica gel desiccant 14 and the molecular sieve desiccant 13 on the device, the molecular sieve desiccant 13 on the device has strong adsorption and different pore sizes. It can adsorb water vapor and air, and the high adsorption and self-color of the color-changing silica gel desiccant 14 will change after being wetted, so that the color difference of the color-changing silica gel desiccant 14 on the device can be observed through the buffer film 10.

[0025] In a preferred embodiment, the inner wall of the drying bin base 1 is provided with internal teeth, and the outer wall of the connecting head 6 is provided with external teeth. By providing the inner wall of the drying bin base 1 on the device with internal teeth, when the drying bin body 5 on the device needs to be installed with the drying bin body 5, the outer wall of the connecting head 6 on the device is threadedly connected with the inner wall of the drying bin base 1, so that the drying bin body 5 on the device is installed based on the drying bin base 1.

[0026] In a preferred embodiment, the number of rubber pads 3 is two, and the two rubber pads 3 are respectively arranged on the top of the filter element 4 in the bin. Through the two rubber pads 3 on the device, when the drying bin body 5 on the device is connected to the drying bin base 1, the filter element 4 in the bin located at the top of the inner cavity of the drying bin body 5 needs to avoid clogging the air hole 2, so that the rubber pad 3 is used to separate them, thereby maintaining a certain distance between the filter element 4 in the bin and the air hole 2.

[0027] The working principle is as follows: first, the filter element 4 in the bin and the gas joint 7 on the device are used in coordination with each other, so that when the gas enters and exits the gas joint 7 on the device, the gas needs to pass through the filter element 4 in the bin, and the filter element 4 in the bin on the device is used to filter the gas, so that the airflow is diverted and filtered when it passes through the filter element 4 in the bin from the gas joint 7 and enters the device, and the elastic buffer membrane 10 will form a damper-like effect, making the pulse gas entering the bin more continuous and smooth, thereby avoiding air pressure fluctuations and affecting the detection accuracy. Then, the buffer membrane 10 on the device and the molecular sieve desiccant 13 and the color-changing silica gel desiccant 14 are used in coordination with each other, so that when the molecular sieve desiccant 13 and the color-changing silica gel desiccant 14 on the device filter the gas in the inner cavity of the drying bin body 5, when the color of the color-changing silica gel desiccant 14 in the device changes or after the molecular sieve desiccant 13 has been used for a long time, the transparent buffer membrane 10 is used as a window, and then the molecular sieve desiccant 13 and the color-changing silica gel desiccant 14 in the device are observed to understand the use status of the drying medium.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas buffer drying chamber, comprising a drying chamber base (1), characterized in that: The inner wall of the drying bin base (1) is provided with an air hole (2), the inner cavity of the drying bin base (1) is sleeved with a rubber pad (3), the inner wall of the drying bin base (1) is sleeved with an inner filter element (4), the inner wall of the drying bin base (1) is sleeved with a drying bin body (5), the outer wall of the drying bin body (5) is fixedly connected with a connector (6), the outer wall of the drying bin body (5) is connected with an air joint (7), the outer wall of the drying bin body (5) is provided with a buffer cavity window (8), the outer wall of the drying bin body (5) is provided with an installation groove (9), a buffer film (10) is placed on the inner wall of the buffer cavity window (8), an installation sealing ring (11) is placed on the inner wall of the installation groove (9), a sealing cover (12) is sleeved on the inner wall of the drying bin body (5), the inner cavity of the drying bin body (5) is loaded with a molecular sieve desiccant (13), and the inner cavity of the drying bin body (5) is loaded with a color-changing silica gel desiccant (14).

2. A gas buffer drying chamber according to claim 1, characterized in that: The outer wall of the filter element (4) in the bin is provided with a plurality of filter holes.

3. A gas buffer drying chamber according to claim 1, characterized in that: The buffer film (10) is made of polytetrafluoroethylene, and the film thickness of the buffer film (10) is less than 1 mm.

4. The gas buffer drying chamber according to claim 1, characterized in that: The color-changing silica gel desiccant (14) is prepared using fine-porous silica gel, a highly active adsorption material, and the molecular sieve desiccant (13) is prepared using aluminosilicate compounds.

5. The gas buffer drying chamber according to claim 1, characterized in that: The inner wall of the drying bin base (1) is provided with inner teeth, and the outer wall of the connecting head (6) is provided with outer teeth.

6. A gas buffer drying chamber according to claim 1, characterized in that: The number of the rubber pads (3) is two, and the two rubber pads (3) are respectively arranged on the top of the filter element (4) in the bin.

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