Air bag cleaning device for gas chromatography sampling

Abstract

The air bag cleaning device comprises two sealing boxes, a four-way valve is installed between the two sealing boxes, a first valve port is formed in the side, close to the sealing boxes, of the four-way valve, and a connecting end is installed at the position, penetrating through the sealing boxes, of the first valve port. A third valve port and a second valve port are connected to the interior of the side, away from the first valve port, of the four-way valve. The compressor is opened, air in the sealing box is compressed through the U-shaped pipe and the mounting pipe, and the third valve port is closed in the compression process, so that the air bag is subjected to pressure, meanwhile, air in the air bag and impurities are sprayed out of the air bag port, and then the air pump is driven; and the air extracting pump discharges impurities in the air bag into the collecting box through the second valve port and the connecting pipe, impurity residues in the air bag are reduced, and the influence on the working environment due to the fact that the impurities are not filtered and discharged is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of air bag cleaning, in particular to an air bag cleaning device for gas chromatography sampling. Background Art

[0002] The quality of air environment is related to human respiratory health, so it is necessary to analyze the gas composition in the air. The more common practice is to use a gas chromatography sampling device to collect air in the environment, and then slowly introduce the air collected by the air bag into the gas chromatography-mass spectrometer for analysis. However, when the sampling air bag is used for a long time, a large amount of impurities will be generated inside, and it needs to be cleaned.

[0003] Existing gas chromatography sampling air bags are often used a second time, and before that, the air bags need to be cleaned before use. However, the existing cleaning devices often do not clean thoroughly and cannot ensure cleanliness. At the same time, no relevant filtering devices are set. The impurities remaining after cleaning can easily affect the working environment. Therefore, an improvement is now made to a gas chromatography sampling air bag cleaning device. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides an air bag cleaning device for gas chromatography sampling. Through the cooperation between a compressor and a vacuum pump, the air bag is subjected to pressure and the internal gas and impurities are ejected from the air bag port, and the vacuum pump discharges the impurities inside the air bag into the collection box through the second valve port and the connecting pipe, thereby reducing the residual impurities inside the air bag and filtering the impurities to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model proposes an air bag cleaning device for gas chromatography sampling, comprising two sealed boxes, a four-way valve is installed between the two sealed boxes, a first valve port is provided on a side of the four-way valve close to the sealed box, the first valve port penetrates through the interior of the sealed box and is provided with a connecting end, a third valve port and a second valve port are respectively connected to the interior of the four-way valve away from the first valve port, an internal fixed sleeve of the third valve port is provided with an input pipe, a second single magnetic valve is installed on the outside of the input pipe, a nitrogen tank is installed on the end of the input pipe, a second connecting pipe is provided on the internal fixed sleeve of the second valve port, one end of the second connecting pipe is connected to a collecting box, a sealed door is hinged on the outside of the collecting box, a filter plate is provided on a movable sleeve at the center of the collecting box, and an air pump is installed on the outside of the collecting box.

[0006] Preferably, a U-shaped tube is sleeved inside the outer side of the two sealing boxes away from the connecting end, a mounting tube is fixedly sleeved outside the U-shaped tube, a first single magnetic valve is installed outside the mounting tube, and a compressor is connected to the end of the mounting tube.

[0007] Preferably, a glass cover is rotatably connected to the outside of the sealed box, and a sealing ring is provided on a side of the glass cover close to the sealed box.

[0008] Preferably, a sealing opening is provided on the outside of one side of the sealing box, a rubber ring is fixedly sleeved inside the sealing opening, and one end of the U-shaped tube is fixedly connected to the sealing opening via the sealing ring.

[0009] Preferably, a disassembly port is installed at one end of the input pipe close to the nitrogen tank, and the nitrogen tank is fixedly connected to the end of the input pipe through the disassembly port.

[0010] Preferably, slide grooves are provided on both sides of the interior of the collecting box, and both sides of the filter plate are slidably connected to the slide grooves.

[0011] Preferably, shock-absorbing frames are fixedly provided at the bottom of the nitrogen tank and the compressor.

[0012] The gas chromatography sampling air bag cleaning device proposed by the utility model can bring the following beneficial effects:

[0013] By turning on the compressor, the air inside the sealed box is compressed through the U-shaped tube and the mounting tube. During the compression process, the third valve port is closed, so that the air bag is pressurized and the internal gas and impurities are ejected from the air bag port. Then, the vacuum pump is driven to discharge the impurities inside the air bag into the collection box through the second valve port and the connecting tube, thereby reducing the residual impurities inside the air bag and avoiding the impact of the impurities not being filtered and discharged on the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0015] In the attached picture:

[0016] Figure 1 The utility model is a schematic diagram of the overall structure of an air bag cleaning device for gas chromatography sampling.

[0017] Figure 2 The utility model is a schematic diagram of the top view of the gas bag cleaning device for gas chromatography sampling.

[0018] Figure 3 The utility model is a side structural schematic diagram of an air bag cleaning device for gas chromatography sampling.

[0019] In the figure: 1. compressor; 2. first single magnetic valve; 3. mounting pipe; 4. U-shaped pipe; 5. sealing door; 6. filter plate; 7. sealing box; 8. four-way valve; 9. second single magnetic valve; 10. nitrogen tank; 11. sealing ring; 12. glass cover; 13. connecting end; 14. vacuum pump; 15. collecting box; 16. input pipe; 17. first valve port; 18. second valve port; 19. third valve port; 20. connecting pipe. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the overall concept of the utility model, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more schemes or examples.

[0025] like Figure 1 to Figure 3 As shown, an embodiment of the utility model proposes an air bag cleaning device for gas chromatography sampling, comprising two sealed boxes 7, a four-way valve 8 is installed between the two sealed boxes 7, a first valve port 17 is provided on the side of the four-way valve 8 close to the sealed box 7, the first valve port 17 penetrates the interior of the sealed box 7 and is installed with a connecting end 13, a third valve port 19 and a second valve port 18 are respectively connected to the interior of the four-way valve 8 away from the first valve port 17, an internal fixed sleeve of the third valve port 19 is provided with an input pipe 16, a second single magnetic valve 9 is installed on the outside of the input pipe 16, a nitrogen tank 10 is installed at the end of the input pipe 16, the nitrogen tank 10 can be any non-toxic gas, but it must meet the gas density less than that of air, a second connecting pipe 20 is provided on the internal fixed sleeve of the second valve port 18, one end of the second connecting pipe 20 is connected to a collecting box 15, a sealing door 5 is hinged on the outside of the collecting box 15, a filter plate 6 is movably sleeved at the center of the collecting box 15, and an air pump 14 is installed on the outside of the collecting box 15. The filter plate 6 is provided with a plurality of filter holes for filtering impurities inside the air bag.

[0026] like Figure 1 As shown, a U-shaped tube 4 is sleeved inside the outer side of the two sealing boxes 7 away from the connection end 13, and a mounting tube 3 is fixedly sleeved outside the U-shaped tube 4. A first single magnetic valve 2 is installed outside the mounting tube 3, and a compressor 1 is connected to the end of the mounting tube 3. The first electromagnetic valve 2 can control the opening of the valve to achieve stable regulation of the gas flow.

[0027] like Figure 1 As shown, the outside of the sealed box 7 is rotatably connected with a glass cover 12, and a sealing ring 11 is provided on one side of the glass cover 12 close to the sealed box 7. It is convenient to observe the nitrogen-filled bag inside the sealed box 7.

[0028] like Figure 1As shown, a sealing opening is provided on one side of the sealing box 7, a rubber ring is fixedly sleeved inside the sealing opening, and one end of the U-shaped tube 4 is fixedly connected to the sealing opening through the sealing ring. When the compressor 1 compresses the inside of the sealing box 7, it is not easy to leak inside, thereby increasing the sealing performance during compression.

[0029] like Figure 1 and Figure 2 As shown, a disassembly port is installed at one end of the input pipe 16 close to the nitrogen tank 10, and the nitrogen tank 10 is fixedly connected to the end of the input pipe 16 through the disassembly port. After the nitrogen tank 10 is used up, it can be replaced through the disassembly port without delaying the working time.

[0030] like Figure 1 As shown, chutes are provided on both sides of the interior of the collecting box 15, and both sides of the filter plate 6 are slidably connected with the chutes. The filter plate 6 can be replaced through the chutes, but the filter plate 6 must be compatible with the chutes.

[0031] like Figure 1 and Figure 3 As shown, the nitrogen tank 10 and the bottom of the compressor 1 are both fixedly provided with a shock-absorbing frame to reduce the vibration of the device during operation and provide a good working environment for cleaning the air bag.

[0032] Working principle:

[0033] Before use, the nitrogen tank 10 is fixedly connected to the disassembly port at the end of the input pipe 16, and then the two air bags are taken out, and the interface of the air bag is fixedly connected to the connecting end 13, and then the glass cover 12 is fixedly connected to the top of the sealed box 7, and the external power supply is turned on to open the second electromagnetic valve 9, and then the two first valve ports 17 and the third valve port 19 inside the four-way valve 8 are opened. At this time, the valve of the connecting pipe 20 is in a closed state, and then the nitrogen inside the nitrogen tank 10 passes through the input pipe 16 and the third valve port 19 and the two first valve ports 17, and the air bag fixedly connected to the external connecting end 13 of the first valve port 17 is inflated with nitrogen, and then the air bag inside the sealed box 7 can be observed through the glass cover 12. In this case, when the air bag is inflated, the inflation of the air bag is stopped, the compressor 1 is turned on, and the air inside the sealing box 7 is compressed through the U-shaped tube 4 and the mounting tube 3. During the compression process, the third valve port 19 is closed, so that the air bag is pressurized and the internal gas and impurities are squeezed out from the air bag port. Then, the vacuum pump 14 is driven to discharge the impurities inside the air bag into the collection box 15 through the second valve port 18 and the connecting tube 20, so as to reduce the residual impurities inside the air bag, and filter the impurities through the internal filter plate 6. After filtering, the gas is discharged through the vacuum pump 14, so as to thoroughly clean the impurities inside the air bag, and the normal working environment will not be affected during cleaning.

[0034] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0035] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A gas chromatography sampling air bag cleaning device, comprising two sealed boxes (7), characterized in that: A four-way valve (8) is installed between the two sealing boxes (7), a first valve port (17) is provided on a side of the four-way valve (8) close to the sealing box (7), the first valve port (17) penetrates the interior of the sealing box (7) and is provided with a connecting end (13), a third valve port (19) and a second valve port (18) are respectively connected to the interior of the four-way valve (8) away from the first valve port (17), an input pipe (16) is fixedly sleeved inside the third valve port (19), and the input pipe (16) is connected to the third valve port (19) and the second valve port (18) is connected to the third valve port (19). A second single magnetic valve (9) is installed on the outside of the said input pipe (16), a nitrogen tank (10) is installed on the end of the said input pipe (16), a second connecting pipe (20) is fixedly sleeved inside the said second valve port (18), one end of the said second connecting pipe (20) is connected to a collecting box (15), a sealing door (5) is hingedly connected to the outside of the said collecting box (15), a filter plate (6) is movably sleeved at the center of the said collecting box (15), and a vacuum pump (14) is installed on the outside of the said collecting box (15).

2. A gas chromatography sampling air bag cleaning device according to claim 1, characterized in that: A U-shaped tube (4) is sleeved inside the outer side of the two sealing boxes (7) away from the connection end (13), and a mounting tube (3) is fixedly sleeved outside the U-shaped tube (4). A first single magnetic valve (2) is installed outside the mounting tube (3), and the end of the mounting tube (3) is connected to the compressor (1).

3. The gas chromatography sampling air bag cleaning device according to claim 1, characterized in that: The outside of the sealing box (7) is rotatably connected to a glass cover (12), and a sealing ring (11) is provided on a side of the glass cover (12) close to the sealing box (7).

4. The gas chromatography sampling air bag cleaning device according to claim 2, characterized in that: A sealing opening is provided on the outside of one side of the sealing box (7), a rubber ring is fixedly sleeved inside the sealing opening, and one end of the U-shaped tube (4) is fixedly connected to the sealing opening via the sealing ring.

5. The gas chromatography sampling air bag cleaning device according to claim 1, characterized in that: A disassembly port is installed at one end of the input pipe (16) close to the nitrogen tank (10), and the nitrogen tank (10) is fixedly connected to the end of the input pipe (16) through the disassembly port.

6. The gas chromatography sampling air bag cleaning device according to claim 1, characterized in that: Slide grooves are provided on both sides of the interior of the collection box (15), and both sides of the filter plate (6) are slidably connected to the slide grooves.

7. The gas chromatography sampling air bag cleaning device according to claim 1, characterized in that: Shock-absorbing frames are fixedly provided at the bottoms of the nitrogen tank (10) and the compressor (1).

Images