Gas collection device of portable gas chromatograph

Abstract

The utility model provides a gas collecting device of a portable gas chromatograph, which comprises a chromatograph and a handheld part, one side of the chromatograph is provided with a gas inlet joint, the gas inlet joint is connected with the handheld part through a corrugated pipe, and one end of the corrugated pipe, which is connected with the gas inlet joint, is fixedly provided with a joint; one end of the connector is fixedly sleeved with an annular limiting block, the bottom of the annular limiting block is inclined inwards, and the end, provided with the annular limiting block, of the connector is matched with the opening end, away from the chromatograph, of the gas inlet connector and is in sliding insertion fit with the opening end; a clamping block is rotationally arranged on the outer surface of the air inlet connector, one side of the clamping block is obliquely arranged, the oblique side of the clamping block is in sliding fit with the oblique side of the annular limiting block, and the clamping block is in limiting abutting fit with the connector. The outer surface of the air inlet connector is provided with an elastic piece and a limiting piece. And after a worker relieves the limiting of the limiting piece on the clamping block, the connector is directly aligned with the air inlet connector and pushed in.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas chromatographs, and in particular relates to a gas collection device for a portable gas chromatograph. Background Art

[0002] A gas chromatograph utilizes chromatographic separation and detection techniques to perform qualitative and quantitative analysis on complex, multi-component mixtures. Gas chromatographs require pre-collection of gases, which requires a removable connection between a portable gas chromatograph and a handheld unit via a conduit. However, existing gas chromatographs require a long time to connect to the handheld unit, resulting in limited practicality and limitations.

[0003] The existing patent with announcement number CN213041794U discloses a gas collection device for a portable gas chromatograph, which is equipped with a chromatograph, a bellows, a joint, an air inlet joint, a connecting head, etc. When assembly is required, the operator first aligns the joint of the bellows with the air inlet joint of the chromatograph, and then rotates the connecting head so that the connecting head is threadedly connected to the outer surface of the air inlet joint, thereby realizing the docking of the joint and the inner conduit of the air inlet joint, and then completing the connection work between the bellows and the chromatograph.

[0004] Due to the inherent characteristics of threaded connections, when initially connecting the internal threads of the connector to the external threads of the air inlet fitting, the operator must ensure that the connection between the two parts is always stable, which requires a high level of operation. If the connector or air inlet fitting deviates slightly during connection, it is easy for the connection to fail. The fault tolerance is low, and after the connection fails, the operator must re-thread the connector onto the air inlet fitting, which increases the connection time unnecessarily and has certain practical limitations. Utility Model Content

[0005] In order to solve the problems existing in the background technology, the utility model provides a gas collection device for a portable gas chromatograph.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A gas collection device for a portable gas chromatograph comprises a chromatograph and a handheld component, an air inlet connector being installed on one side of the chromatograph, the air inlet connector being connected to the handheld component by a bellows, and a fixed connector being provided at one end of the bellows connected to the air inlet connector; an annular limit block being fixedly sleeved on one end of the connector, the bottom of the annular limit block being tilted inwardly, one end of the connector provided with the annular limit block being adapted to the open end of the air inlet connector away from the chromatograph and the two being slidably plugged in and matched; a clamping block being rotatably provided on the outer surface of the air inlet connector, one side of the clamping block being tilted, the inclined side of the clamping block being slidably matched with the inclined side of the annular limit block, and the clamping block and the connector being limited and conflictingly matched; the outer surface of the air inlet connector is provided with both an elastic part and a limit part.

[0008] Furthermore, a plurality of first fixing plates are fixedly provided on the outer surface of the air intake joint, and the plurality of first fixing plates are distributed in a circular array along the central axis of the air intake joint; the plurality of first fixing plates are grouped in pairs, and a clamping block is provided between each of the two first fixing plates in the same group through rotation of a rotating shaft; the elastic member is specifically a torsion spring, one end of the torsion spring is fixedly connected to the first fixing plate, and the other end is fixedly connected to the clamping block.

[0009] Furthermore, the limiting member includes a second fixed plate, a slip ring is rotatably provided on the outer circumference of the air intake joint, and a plurality of movable plates are fixedly provided on the slip ring; a plurality of second fixed plates are fixedly provided on the air intake joint, and the number of movable plates, second fixed plates and clamping blocks are equal and correspond to each other, and each movable plate is provided with a clamping column; each of the clamping columns slides through the corresponding second fixed plate and is engaged with the corresponding clamping block; a spring is provided between each movable plate and the corresponding second fixed plate.

[0010] Furthermore, the chromatograph is electrically connected to the handheld component via a wire, and a control switch is installed on the handheld component.

[0011] This application has the following beneficial effects:

[0012] After releasing the limit of the block by the limit piece, the staff can directly align the connector with the air intake connector and push it in. The entire operation does not require considering whether there will be a slight deviation during the process of pushing the connector in. The overall fault tolerance rate is high, avoiding the problem of increased connection time due to repeated operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

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

[0015] Figure 2 This utility model Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0016] Figure 3 This utility model Figure 2 sectional view of

[0017] Figure 4 This is a schematic diagram of the structure of the clamping column of the utility model;

[0018] Figure 5 It is a cross-sectional view of the connection between the connector of the utility model and the air intake connector.

[0019] Description of reference numerals:

[0020] 1. Chromatograph; 2. Handheld component; 3. Bellows; 4. Wire; 5. Air inlet connector; 6. Clamp; 7. Torsion spring; 8. Connector; 9. First fixed plate; 10. Second fixed plate; 11. Moving plate; 12. Spring; 13. Clamp column; 14. Slip ring; 15. Control switch. DETAILED DESCRIPTION

[0021] 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. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0022] like Figure 1-Figure 5 As shown, the technical solution adopted by the present invention is as follows: a gas collection device for a portable gas chromatograph, comprising a chromatograph 1 and a handheld component 2, an air inlet connector 5 is fixedly arranged on one side of the chromatograph 1, and the air inlet connector 5 is connected to the handheld component 2 through a bellows 3, and the bellows 3 can be freely extended and retracted, thereby increasing the operating range of the handheld component.

[0023] One end of the bellows 3 is connected to the inlet connector 5 via a connector 8. An annular stopper is fixedly mounted on the end of the connector 8 facing away from the bellows 3, with the bottom of the annular stopper tilted inward. The end of the connector 8 with the annular stopper fits snugly into the opening of the inlet connector 5 facing away from the chromatograph 1, and the two are slidably engaged. The stopper serves to seal the opening of the inlet connector 5 facing away from the chromatograph 1. Furthermore, a sealing ring is provided within the inlet connector 5, which contacts the connector 8.

[0024] Several first fixing plates 9 are fixedly mounted on the outer surface of the air inlet connector 5. These first fixing plates 9 are arranged in a circular array along the central axis of the air inlet connector 5. These first fixing plates 9 are grouped in pairs, with a clamping block 6 rotatably mounted between each pair of first fixing plates 9 within the same group. These clamping blocks 6 are arranged in a circular array along the central axis of the air inlet connector 5.

[0025] like Figure 5 As shown, the clamping block 6 is composed of a first sub-plate and a second sub-plate. The first sub-plate is arranged along the central axis of the air inlet connector 5, and the second sub-plate is arranged along the radial direction of the air inlet connector 5. The side of the second sub-plate close to the central axis of the air inlet connector 5 is inclined. The inclined side of the second sub-plate is adapted to the inclined side of the annular limiting ring and the two are slidably fitted. The top of the annular limiting block is flush with the top of the air inlet connector 5, and the bottom of the second sub-plate is in abutment with the top of the air inlet connector 5 and the top of the annular limiting block. By limiting the annular limiting block by the second sub-plate, the limiting block can be prevented from being separated from the air inlet connector 5, thereby ensuring the stability of the connection between the bellows 3 and the chromatograph 1.

[0026] In addition, the outer surface of the air inlet connector 5 is provided with both an elastic member for driving the block 6 to return to its original position and a limit member for limiting the rotation of the block 6. The elastic member is specifically a torsion spring 7, one end of which is fixedly connected to the first fixing plate 9 and the other end is fixedly connected to the block 6.

[0027] The stopper includes a second fixed plate 10. A slip ring 14 is rotatably mounted on the outer circumference of the inlet connector 5. A number of movable plates 11 are fixedly mounted on the slip ring 14. These movable plates 11 are all slidably connected to the inlet connector 5 and arranged in a circular array along the central axis of the slip ring 14. Several second fixed plates 10 are fixed to the end of the inlet connector 5 away from the chromatograph 1. The number of movable plates 11, second fixed plates 10, and clamping blocks 6 are equal and correspond to each other. Each movable plate 11 is equipped with an arc-shaped clamping column 13, which has the same curvature as the slip ring 14.

[0028] Each arcuate clamping column 13 slides through its corresponding second fixed plate 10 and engages with its corresponding clamping block 6. Furthermore, a spring 12 is positioned between each movable plate 11 and its corresponding second fixed plate 10. The spring 12 is sleeved onto the outer surface of the clamping column 13. One end of the spring 12 is fixedly connected to the movable plate 11, while the other end is fixedly connected to the second fixed plate 10.

[0029] The connection method between the other end of the bellows 3 and the handheld component 2 is the same as the above structure, and this solution will not be repeated.

[0030] In addition, the chromatograph 1 is also equipped with a collection bottle (not shown) and a sampling pump (not shown). The collection bottle, the sampling pump, and the air inlet connector 5 are connected in sequence via an air pipe. The collection bottle and the sampling pump are the same as those in the comparative patent publication number CN213041794U, and will not be described in detail in this solution.

[0031] The chromatograph 1 and the handheld component 2 are electrically connected via a wire 4. The handheld component 2 is provided with a control switch 15 to facilitate the operator to control the operation of the sample injection pump during the collection process.

[0032] Working principle: When in use, the slip ring 14 is rotated, which drives the plurality of movable plates 11 to rotate around the central axis of the slip ring 14, thereby driving the plurality of clamping columns 13 to rotate synchronously, thereby releasing the restriction of the clamping columns 13 on the clamping block 6. During this process, the spring 12 is gradually stretched.

[0033] Then, align connector 8 with intake connector 5 and insert it into the interior of the intake connector 5. During the insertion process, the annular stop on connector 8 will push the clamping block 6 away, causing the clamping block 6 to rotate about the central axis of the rotating shaft, and the deformation of the torsion spring 7 will gradually increase. When the annular stop on connector 8 is fully inserted into the intake connector 5, the clamping block 6 will quickly return to its original position under the elastic action of the torsion spring 7, thereby abutting the annular stop and preventing connector 8 from separating from the intake connector 5.

[0034] After the block 6 is reset, the slip ring 14 is released. Under the elastic action of the spring 12, the slip ring 14 rotates in the opposite direction and resets, thereby driving the clamping column 13 to be locked in the block 6, thereby completing the position restriction of the block 6. The handpiece 2 and the bellows 3 are connected in the same manner as above.

[0035] Finally, the sampling pump is controlled by the control switch 15 to collect gas, and the collected gas finally enters the collection bottle.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas collection device for a portable gas chromatograph, characterized in that: The invention comprises a chromatograph (1) and a handheld component (2), wherein an air inlet connector (5) is installed on one side of the chromatograph (1), the air inlet connector (5) and the handheld component (2) are connected via a bellows (3), and a connector (8) is fixedly provided at one end of the bellows (3) connected to the air inlet connector (5); an annular limit block is fixedly sleeved on one end of the connector (8), the bottom of the annular limit block is tilted inwardly, and one end of the connector (8) provided with the annular limit block is adapted to the open end of the air inlet connector (5) away from the chromatograph (1), and the two are slidably plugged in and matched; a clamping block (6) is rotatably provided on the outer surface of the air inlet connector (5), one side of the clamping block (6) is tilted, the inclined side of the clamping block (6) is slidably matched with the inclined side of the annular limit block, and the clamping block (6) and the connector (8) are limited and abutted; the outer surface of the air inlet connector (5) is provided with both an elastic member and a limit member.

2. The gas sampling device for a portable gas chromatograph according to claim 1, characterized in that: A plurality of first fixing plates (9) are fixedly arranged on the outer surface of the air intake connector (5), and the plurality of first fixing plates (9) are distributed in a circular array along the central axis of the air intake connector (5); the plurality of first fixing plates (9) are grouped in pairs, and a clamping block (6) is arranged between each of the two first fixing plates (9) in the same group through a rotating shaft; the elastic member is specifically a torsion spring (7), one end of the torsion spring (7) is fixedly connected to the first fixing plate (9), and the other end is fixedly connected to the clamping block (6).

3. The gas sampling device for a portable gas chromatograph according to claim 2, characterized in that: The limiting component includes a second fixed plate (10), a slip ring (14) is rotatably provided on the outer peripheral surface of the air intake connector (5), and a plurality of movable plates (11) are fixedly provided on the slip ring (14); a plurality of second fixed plates (10) are fixedly provided on the air intake connector (5), and the number of movable plates (11), second fixed plates (10) and clamping blocks (6) are equal and correspond to each other, and each movable plate (11) is provided with a clamping column (13); each clamping column (13) slides through the corresponding second fixed plate (10) and is clamped and matched with the corresponding clamping block (6); a spring (12) is provided between each movable plate (11) and the corresponding second fixed plate (10).

4. The gas sampling device for a portable gas chromatograph according to claim 1, characterized in that: The chromatograph (1) and the handheld component (2) are electrically connected via a wire (4), and a control switch (15) is installed on the handheld component (2).

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