Gas sampling device

Abstract

The invention provides a gas sampling device, which comprises: a gas storage cylinder, which is internally provided with a gas storage cavity; the gas channel is arranged on the gas storage cylinder and is communicated with the gas storage cavity; the piston is movably arranged in the gas storage cavity; the connecting rod is movably arranged on the air cylinder in a penetrating mode, the connecting rod is connected with the piston to drive the piston to move, and a mounting cavity is formed in the connecting rod; the rack is arranged on the side wall of the mounting cavity; the gear is rotatably arranged in the mounting cavity and engaged with the rack; and the driving part is arranged on the outer side of the air cylinder and drives the gear to rotate so as to drive the rack to move, so that the connecting rod moves. According to the technical scheme, the problem that the detection precision of the detector is affected due to the fact that errors exist between the volume of the gas conveyed into the detector and the preset value in the prior art is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid sampling devices, and in particular to a gas sampling device. Background Art

[0002] When performing gas quality analysis on a gas, the gas needs to be input into a detector, which can detect and record the ion signals after the gas molecules are ionized. The gas is placed in a gas compressor.

[0003] In the related art, when it is necessary to deliver gas to the detector, the gas compressor is connected to the detector through a compression pipeline to reduce the pressure of the high-pressure gas in the gas compressor and deliver it to the detector. A pressure reducing valve is provided on the compression pipeline, and the volume of the gas delivered to the detector is controlled by adjusting the parameters of the pressure reducing valve and controlling the time for the gas to pass through the compression pipeline.

[0004] However, due to pressure fluctuations in the gas compressor or errors in the pressure regulation of the pressure reducing valve, the volume of the gas delivered to the detector may differ from the preset value, thus affecting the detection accuracy of the detector. Summary of the invention

[0005] The main purpose of the present invention is to provide a gas sampling device to solve the problem in the related art that the volume of the gas delivered to the detector is different from the preset value, thereby affecting the detection accuracy of the detector.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a gas sampling device is provided, comprising: a gas cylinder, having a gas storage chamber therein; a gas channel, arranged on the gas cylinder and connected to the gas storage chamber; a piston, movably arranged in the gas storage chamber; a connecting rod, movably passed through the gas cylinder, the connecting rod is connected to the piston to drive the piston to move, and a mounting chamber is arranged in the connecting rod; a rack, arranged on the side wall of the mounting chamber; a gear, rotatably arranged in the mounting chamber and meshing with the rack; a driving member, arranged on the outside of the gas cylinder, the driving member drives the gear to rotate to drive the rack to move, so as to move the connecting rod.

[0007] Furthermore, the gas storage cylinder is provided with an avoidance hole for the connecting rod to pass through, and the gas sampling device also includes a flange arranged on the hole wall of the avoidance hole.

[0008] Furthermore, a guide structure is arranged between the flange and the connecting rod, and the guide structure includes a first guide groove and a guide block cooperating with the first guide groove for guiding. One of the first guide groove and the guide block is arranged on the connecting rod, and the other of the first guide groove and the guide block is arranged on the flange.

[0009] Furthermore, the driving member includes a driving motor and a driving rod connected between the driving motor and the gear, and the driving motor drives the driving rod to rotate to drive the gear to rotate.

[0010] Furthermore, the gas sampling device also includes a mounting plate arranged on the outer side wall of the gas storage cylinder, and the driving motor is arranged on the mounting plate.

[0011] Furthermore, the gas sampling device also includes a clamping assembly arranged on the outer wall of the gas cylinder, the clamping assembly includes a first clamping member and a second clamping member movably arranged on the outer wall of the gas cylinder, and the first clamping member has a clamping position close to the second clamping member and a release position away from the second clamping member.

[0012] Furthermore, the clamping assembly also includes a mounting seat arranged on the outer side wall of the air cylinder, a moving block movably arranged in the mounting seat, and an elastic member connected between the mounting seat and the moving block, the first clamping member is connected to the moving block, and the elastic member applies an elastic force to the moving block so that the first clamping member can be maintained in the clamping position.

[0013] Furthermore, a second guide groove is provided on the inner side wall of the mounting seat, and the movable block extends into the second guide groove and cooperates with the second guide groove; and / or, the elastic member is a spring, and the clamping assembly also includes a guide rod arranged in the mounting seat, the movable block is movably mounted on the guide rod, and the spring is mounted outside the guide rod.

[0014] Furthermore, the gas sampling device also includes a shock absorbing assembly arranged on the outer side wall of the gas storage cylinder, and the shock absorbing assembly includes a protective plate and a shock absorbing member connected between the protective plate and the outer side wall of the gas storage cylinder.

[0015] Further, there are multiple shock absorbing members, and the multiple shock absorbing member arrays are arranged between the protective plate and the outer side wall of the air cylinder; and / or, there are two shock absorbing assemblies, and the two shock absorbing assemblies are respectively arranged on two opposite side walls of the air cylinder.

[0016] By applying the technical solution of the present invention, the gas sampling device includes: a gas cylinder, a gas channel, a piston, a connecting rod, a rack, a gear and a driving member. The gas cylinder has a gas storage chamber. The gas channel is arranged on the gas cylinder and is connected to the gas storage chamber. The piston is movably arranged in the gas storage chamber. The connecting rod is movably arranged on the gas cylinder, and the connecting rod is connected to the piston to drive the piston to move. A mounting chamber is arranged in the connecting rod, and the rack is arranged on the side wall of the mounting chamber. The gear is rotatably arranged in the mounting chamber and meshes with the rack. The driving member is arranged on the outside of the gas cylinder, and the driving member drives the gear to rotate to drive the rack to move, so as to move the connecting rod. In this way, when it is necessary to transport gas to the detector, the gas channel is connected to the gas compressor, so that the gas in the gas compressor can enter the gas storage chamber and be decompressed, and the gas in the gas storage chamber drives the piston to move, so that the operator can know whether the volume of the gas in the gas storage chamber reaches the preset value according to whether the piston moves into place. After the volume in the gas storage chamber reaches a preset value, the gas channel is connected to the detector, so that the driving member drives the gear to rotate and drives the rack to move, so that the connecting rod drives the piston to move, thereby pushing the gas in the gas storage chamber into the detector. The above arrangement can decompress the gas in the gas compressor and sample the rated volume of gas, reducing the error between the volume of the gas and the preset value during sampling, and improving the detection accuracy of the detector. Therefore, the technical solution of the present application effectively solves the problem in the related art that the volume of the gas delivered to the detector has an error with the preset value, which affects the detection accuracy of the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A front view of an embodiment of a gas sampling device according to the present invention is shown;

[0019] Figure 2 Shows Figure 1 A schematic cross-sectional view of a gas sampling device;

[0020] Figure 3 Shows Figure 2 A partial enlarged view of the gas sampling device at A;

[0021] Figure 4 Shows Figure 1 A partial cross-sectional schematic diagram of a gas sampling device;

[0022] Figure 5 Shows Figure 1 A schematic cross-sectional view of a clamping assembly of a gas sampling device.

[0023] The above drawings include the following reference numerals:

[0024] 1. Gas reservoir; 2. Piston; 3. Connecting rod; 4. Rack; 5. Gas channel; 6. Elastic member; 7. Driving motor; 8. Mounting seat; 9. First clamping member; 10. Shock-absorbing member;

[0025] 11. Protective plate; 12. Flanging; 13. Guide block; 14. Gear; 15. Drive rod; 16. Guide rod; 17. Moving block;

[0026] 301, first guide groove; 701, mounting plate; 801, second guide groove; 802, avoidance long hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0030] By applying the technical solution of the present invention, the gas sampling device includes: a gas cylinder 1, a gas channel 5, a piston 2, a connecting rod 3, a rack 4, a gear 14 and a driving member. The gas cylinder 1 has a gas storage chamber. The gas channel 5 is arranged on the gas cylinder 1 and is connected to the gas storage chamber. The piston 2 is movably arranged in the gas storage chamber. The connecting rod 3 is movably inserted into the gas cylinder 1, and the connecting rod 3 is connected to the piston 2 to drive the piston 2 to move. An installation cavity is arranged in the connecting rod 3, and the rack 4 is arranged on the side wall of the installation cavity. The gear 14 is rotatably arranged in the installation cavity and meshes with the rack 4. The driving member is arranged on the outside of the gas cylinder 1, and the driving member drives the gear 14 to rotate to drive the rack 4 to move, so as to move the connecting rod 3.

[0031] In this way, when it is necessary to deliver gas to the detector, the gas channel 5 is connected to the gas compressor so that the gas in the gas compressor can enter the gas storage chamber and be decompressed. The gas in the gas storage chamber pushes the piston 2 to move, so that the operator can know whether the volume of the gas in the gas storage chamber has reached the preset value based on whether the piston 2 has moved into place. After the volume in the gas storage chamber reaches the preset value, the gas channel 5 is connected to the detector so that the driving member drives the gear 14 to rotate and drives the rack 4 to move, so that the connecting rod 3 drives the piston 2 to move, thereby pushing the gas in the gas storage chamber into the detector. The above arrangement can decompress the gas in the gas compressor and sample the rated volume of gas, reducing the error between the volume of the gas and the preset value during sampling, and improving the detection accuracy of the detector. Therefore, the technical solution of the present application effectively solves the problem in the related art that the volume of the gas delivered to the detector has an error with the preset value, which affects the detection accuracy of the detector.

[0032] like Figures 1 to 5 As shown, the gas cylinder 1 is provided with an escape hole for the connecting rod 3 to pass through, and the gas sampling device further comprises a flange 12 provided on the hole wall of the escape hole. The setting of the flange 12 can reduce the gap between the connecting rod 3 and the escape hole, and reduce the possibility of foreign matter entering the gas cylinder 1 from between the connecting rod 3 and the escape hole.

[0033] like Figures 1 to 5 As shown, a guide structure is provided between the flange 12 and the connecting rod 3. The guide structure includes a first guide groove 301 and a guide block 13 that cooperates with the first guide groove 301. The first guide groove 301 is provided on the connecting rod 3, and the guide block 13 is provided on the flange 12. The provision of the guide structure makes the movement of the connecting rod 3 relative to the gas reservoir 1 more stable. The structure of the first guide groove 301 and the guide block 13 is simple and easy to process.

[0034] In other embodiments, the first guide groove 301 is disposed on the flange 12 , and the guide block 13 is disposed on the connecting rod 3 .

[0035] like Figures 1 to 5As shown, the driving member includes a driving motor 7 and a driving rod 15 connected between the driving motor 7 and the gear 14. The driving motor 7 drives the driving rod 15 to rotate to drive the gear 14 to rotate. The setting of the driving rod 15 can drive the driving motor 7 and the gear. In this embodiment, the connecting rod 3 is provided with an avoidance slot for avoiding the movement of the driving rod 15.

[0036] like Figures 1 to 5 As shown, the gas sampling device further comprises a mounting plate 701 arranged on the outer side wall of the gas storage cylinder 1, and the driving motor 7 is arranged on the mounting plate 701. The arrangement of the mounting plate 701 facilitates the arrangement of the driving motor 7. The mounting plate 701 has a simple structure and is easy to process.

[0037] like Figures 1 to 5 As shown, the gas sampling device also includes a clamping assembly arranged on the outer side wall of the gas storage cylinder 1. The clamping assembly includes a first clamping member 9 and a second clamping member movably arranged on the outer side wall of the gas storage cylinder 1. The first clamping member 9 has a clamping position close to the second clamping member and a loosening position away from the second clamping member. The arrangement of the clamping assembly facilitates fixing the gas sampling device on the detector. The arrangement structure of the first clamping member 9 and the second clamping member is simple. When the first clamping member 9 is close to the second clamping member, the clamping assembly can clamp the pipe near the detector. When the first clamping member 9 is away from the second clamping member, the clamping assembly can be removed from the pipe near the detector.

[0038] like Figures 1 to 5 As shown, the clamping assembly also includes a mounting seat 8 arranged on the outer side wall of the gas storage cylinder 1, a moving block 17 movably arranged in the mounting seat 8, and an elastic member 6 connected between the mounting seat 8 and the moving block 17. The first clamping member 9 is connected to the moving block 17, and the elastic member 6 applies an elastic force to the moving block 17 so that the first clamping member 9 can be kept in the clamping position. The setting of the elastic member 6 enables the first clamping member 9 to be kept in the clamping position. In this embodiment, the mounting seat 8 is provided with an avoidance elongated hole 802 for avoiding the movement of the moving block 17.

[0039] like Figures 1 to 5 As shown, a second guide groove 801 is provided on the inner side wall of the mounting seat 8, and the moving block 17 extends into the second guide groove 801 and cooperates with the second guide groove 801. The guiding cooperation between the second guide groove 801 and the moving block 17 makes the movement of the moving block 17 more stable, so that the switching of the first clamping member 9 between the clamping position and the release position is smoother. The elastic member 6 is a spring, and the clamping assembly also includes a guide rod 16 arranged in the mounting seat 8, and the moving block 17 is movably sleeved on the guide rod 16, and the spring is sleeved outside the guide rod 16. The setting of the guide rod 16 can limit the moving direction of the moving block 17, so that the movement of the moving block 17 is more stable.

[0040] In other embodiments, the inner side wall of the mounting seat 8 is provided with a second guide groove 801, and the moving block 17 extends into the second guide groove 801 and cooperates with the second guide groove 801. Alternatively, the elastic member 6 is a spring, and the clamping assembly further includes a guide rod 16 disposed in the mounting seat 8, the moving block 17 is movably sleeved on the guide rod 16, and the spring is sleeved outside the guide rod 16.

[0041] like Figures 1 to 5 As shown, the gas sampling device further includes a shock absorbing assembly arranged on the outer side wall of the gas cylinder 1, and the shock absorbing assembly includes a protective plate 11 and a shock absorbing member 10 connected between the protective plate 11 and the outer side wall of the gas cylinder 1. The setting of the shock absorbing assembly can protect the gas cylinder 1 and reduce the collision to the gas cylinder 1. When the gas cylinder 1 falls and contacts the ground, it can play a role of buffering and protection.

[0042] like Figures 1 to 5 As shown, there are multiple shock absorbing members 10, and the multiple shock absorbing members 10 are arranged in an array between the protective plate 11 and the outer side wall of the gas reservoir 1. There are two shock absorbing assemblies, and the two shock absorbing assemblies are respectively arranged on two opposite side walls of the gas reservoir 1. The arrangement of multiple shock absorbing members 10 can further reduce the collision of the gas reservoir 1.

[0043] In other embodiments, there are multiple shock absorbing members 10, and the multiple shock absorbing members 10 are arranged in an array between the protective plate 11 and the outer side wall of the gas reservoir 1. Alternatively, there are two shock absorbing assemblies, and the two shock absorbing assemblies are respectively arranged on two opposite side walls of the gas reservoir 1.

[0044] The gas sampling device in the present embodiment is used for sampling carbon dioxide, and the sampled carbon dioxide is delivered to the detector. The gas mass spectrometer is mainly composed of an ion source, a mass analyzer and a detector. Its basic principle is to ionize the gaseous molecules in the sample to be analyzed, and then compare the sizes according to their mass-to-charge ratio (m / z), and finally detect and record the ion signal through the detector. The ion source can ionize the gas molecules by methods such as ionization, chemical reaction or laser collision. The mass analyzer uses a magnetic field or an electric field to separate the ions according to the ratio of the mass-to-charge ratio. Finally, the detector converts the ion signal into an electrical signal output. When working on the gas quality analysis of carbon dioxide, a gas sampling device is needed.

[0045] By applying the technical solution of this embodiment, the gas sampling device can sample a rated volume of gas, thereby improving practicality and convenience.

[0046] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0049] The above description is only a preferred 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 replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas sampling device, characterized in that: include: An air storage cylinder (1), wherein the air storage cylinder (1) has an air storage cavity; A gas channel (5) is arranged on the gas storage cylinder (1) and is connected to the gas storage chamber; A piston (2) is movably arranged in the gas storage chamber; A connecting rod (3) is movably arranged on the gas storage cylinder (1), the connecting rod (3) is connected to the piston (2) to drive the piston (2) to move, and a mounting cavity is arranged in the connecting rod (3); A rack (4) is arranged on a side wall of the installation cavity; a gear (14) rotatably disposed in the mounting cavity and meshing with the rack (4); A driving member is arranged on the outside of the gas storage cylinder (1), and the driving member drives the gear (14) to rotate to drive the rack (4) to move, thereby causing the connecting rod (3) to move.

2. The gas sampling device according to claim 1, characterized in that: The gas storage cylinder (1) is provided with an escape hole for the connecting rod (3) to pass through, and the gas sampling device further comprises a flange (12) provided on the hole wall of the escape hole.

3. The gas sampling device according to claim 2, characterized in that: A guide structure is arranged between the flange (12) and the connecting rod (3), and the guide structure comprises a first guide groove (301) and a guide block (13) which cooperates with the first guide groove (301) for guiding. One of the first guide groove (301) and the guide block (13) is arranged on the connecting rod (3), and the other of the first guide groove (301) and the guide block (13) is arranged on the flange (12).

4. The gas sampling device according to claim 1, characterized in that: The driving member comprises a driving motor (7) and a driving rod (15) connected between the driving motor (7) and the gear (14); the driving motor (7) drives the driving rod (15) to rotate so as to drive the gear (14) to rotate.

5. The gas sampling device according to claim 4, characterized in that: The gas sampling device further comprises a mounting plate (701) arranged on the outer side wall of the gas storage cylinder (1), and the drive motor (7) is arranged on the mounting plate (701).

6. The gas sampling device according to claim 1, characterized in that: The gas sampling device also includes a clamping assembly arranged on the outer wall of the gas storage cylinder (1), and the clamping assembly includes a first clamping member (9) and a second clamping member movably arranged on the outer wall of the gas storage cylinder (1), and the first clamping member (9) has a clamping position close to the second clamping member and a loosening position away from the second clamping member.

7. The gas sampling device according to claim 6, characterized in that: The clamping assembly further comprises a mounting seat (8) arranged on the outer side wall of the gas storage cylinder (1), a moving block (17) movably arranged in the mounting seat (8), and an elastic member (6) connected between the mounting seat (8) and the moving block (17), the first clamping member (9) being connected to the moving block (17), and the elastic member (6) applying an elastic force to the moving block (17) so that the first clamping member (9) can be maintained in the clamping position.

8. The gas sampling device according to claim 7, characterized in that: A second guide groove (801) is provided on the inner side wall of the mounting seat (8), and the movable block (17) extends into the second guide groove (801) and cooperates with the second guide groove (801) in a guiding manner; and / or the elastic member (6) is a spring, and the clamping assembly further comprises a guide rod (16) provided in the mounting seat (8), the movable block (17) is movably sleeved on the guide rod (16), and the spring is sleeved outside the guide rod (16).

9. The gas sampling device according to claim 1, characterized in that: The gas sampling device further comprises a shock absorbing assembly arranged on the outer side wall of the gas storage cylinder (1), the shock absorbing assembly comprising a protective plate (11) and a shock absorbing member (10) connected between the protective plate (11) and the outer side wall of the gas storage cylinder (1).

10. The gas sampling device according to claim 9, characterized in that: There are a plurality of the shock absorbing members (10), and the plurality of the shock absorbing members (10) are arranged in an array between the protective plate (11) and the outer side wall of the gas storage cylinder (1); and / or, There are two shock absorbing assemblies, and the two shock absorbing assemblies are respectively arranged on two oppositely arranged side walls of the gas storage cylinder (1).

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