Protective structure of gas chromatograph

Abstract

The utility model relates to a protective structure of a gas chromatograph, which belongs to the technical field of detection equipment and comprises a chromatograph body, and a protective component is arranged at the top of the chromatograph body. The protection assembly comprises a positioning plate, the positioning plate is mounted at the top of the chromatograph body, and the top of the positioning plate is fixedly connected with two positioning columns. According to the protection structure of the gas chromatograph, when a sample injection needle body is inserted into a sample injection hole, a positioning plate is placed at the top of a chromatograph body, a protection barrel is located at the top of a positioning column, meanwhile, the positioning barrel is pressed in the protection barrel, and a limiting seat is located at the top of the protection barrel; after the two supporting rods are rotated, the two inserting blocks are inserted into the two L-shaped plates, limiting is conducted through the two positioning pin columns, at the moment, the two fastening screws are tightened, penetrate through the positioning plates and extend into the chromatograph body, and components below the limiting base are fixedly supported; and the sample injection needle body is prevented from being bent as much as possible when being inserted.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a protective structure of a gas chromatograph. Background Art

[0002] Gas chromatograph is an instrument for qualitative and quantitative analysis of complex multi-component mixtures. There are many types of gas chromatographs with different functions, but their basic structures are similar. They are all relatively sophisticated devices. If they are impacted during daily use, the damage to the gas chromatograph is huge, so suitable protective devices are needed to protect them.

[0003] When the gas chromatograph is in use, the injection needle injects the sample into the instrument. Since the injection hole of the gas chromatograph is very small and the injection needle tube is relatively long and thin, the injection needle tube needs to be straightened and inserted vertically into the injection hole during injection, which can easily bend the needle tube. In addition, the pressure applied by manually pressing the injection needle is not uniform. When encountering a dense liquid, the injection needle is easily inconvenient to use and the hand is uncomfortable to press, thereby reducing the user experience of the device. Therefore, a protective structure of a gas chromatograph is proposed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a protective structure for a gas chromatograph, which has the advantages that the injection needle is not easily bent when inserted into the injection hole, the difficulty of user operation can be reduced when liquid is injected, and the user experience is better. It solves the problem that the injection needle is not easily bent when inserted into the injection hole, and the feeling of fatigue of the user's hand pressing when injecting liquid can be reduced.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective structure of a gas chromatograph, comprising a chromatograph body, a protective assembly being arranged on the top of the chromatograph body;

[0006] The protective assembly includes a positioning plate, which is installed on the top of the chromatograph body. Two positioning columns are fixedly connected to the top of the positioning plate. The tops of the two positioning columns are detachably connected to the same protective tube. The interior of the protective tube is movably connected to a connecting plate. The interior of the connecting plate is fixedly connected to a positioning tube. The interior of the positioning tube contains an injection needle body. The top of the protective tube is detachably connected to a limiting seat. The left and right sides of the limiting seat are hinged with support rods. The two support rods are detachably connected to the positioning plate. The interior of the limiting seat is rotatably connected with a screw. The outer surface of the screw is threadedly connected to a movable plate. The front of the movable plate is elastically connected to a baffle, and the back of the baffle is fixedly connected to the limiting column.

[0007] Furthermore, positioning column holes are provided inside the protective tube and the connecting plate, and the two positioning columns are both in the shape of square columns. The protective tube and the connecting plate are both located on the top of the chromatograph body through the positioning columns.

[0008] Furthermore, an annular connecting groove is opened inside the limit seat, and the limit seat is located at the top of the protective tube through the annular connecting groove. The bottoms of the two support rods are fixedly connected with plug-in blocks, and the top of the positioning plate is fixedly connected with two L-shaped plates, and the two plug-in blocks are plugged into the inside of the two L-shaped plates.

[0009] Furthermore, positioning pins are inserted into the interior of the two L-shaped plates, and fastening screws are threadedly connected to the interior of the two L-shaped plates. The two plug-in blocks and the positioning plates are detachably connected to the chromatograph body via the fastening screws.

[0010] Furthermore, a positioning cavity is provided inside the positioning cylinder, the injection needle body is located inside the positioning cylinder through the positioning cavity, the top of the limiting seat is fixedly connected to a limiting rod, and the movable plate is slidably connected to the limiting rod.

[0011] Furthermore, a sliding groove is provided inside the movable plate, and the limiting column slides inside the movable plate through the sliding groove. A U-shaped groove is provided inside the limiting column, and the limiting column is clamped with the push rod of the injection needle body through the U-shaped groove.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] 1. The protective structure of the gas chromatograph is that when the injection needle body is inserted into the injection hole, the positioning plate is placed on the top of the chromatograph body, the protective tube is located on the top of the positioning column, and the positioning tube is pressed on the inside of the protective tube. The limiting seat is located on the top of the protective tube, and the two support rods are rotated and the two plug-in blocks are plugged into the inside of the two L-shaped plates, and the two positioning pins are used for limiting. At this time, the two fastening screws are tightened and extend through the positioning plate to the inside of the chromatograph body, and the components below the limiting seat are fixed and supported to ensure that the injection needle body is avoided from bending as much as possible during insertion.

[0014] 2. The protective structure of the gas chromatograph is that the injection needle body is placed inside the positioning cylinder, and the screw is rotated to drive the moving plate, so that the limiting column inside the moving plate can be connected with the push rod on the top of the injection needle body, and the push rod is limited by the U-shaped groove inside the limiting column. Finally, the screw is rotated to drive the moving plate to move downward with the limiting rod, so that the liquid inside the injection needle body can be more conveniently injected into the interior of the chromatograph body, thereby improving the experience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the main cross-sectional view of the structure of the utility model;

[0016] Figure 2 This is a front view of the structural positioning plate and the protective tube of the utility model;

[0017] Figure 3 This is a top view of the movable plate of the structure of the utility model;

[0018] Figure 4 This is a three-dimensional diagram of the structural limit column of the utility model.

[0019] In the figure: 1. Chromatograph body; 2. Positioning plate; 3. Positioning column; 4. Protective tube; 5. Connecting plate; 6. Positioning tube; 7. Limit seat; 8. Support rod; 9. Plug-in block; 10. L-shaped plate; 11. Fastening screw; 12. Injection needle body; 13. Screw; 14. Moving plate; 15. Limit rod; 16. Baffle; 17. Limit column; 18. U-shaped groove. 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 1-4 A protective structure of a gas chromatograph in this embodiment includes a chromatograph body 1, and a protective component is arranged on the top of the chromatograph body 1.

[0022] The protective assembly includes a positioning plate 2, which is installed on the top of the chromatograph body 1. Two positioning columns 3 are fixedly connected to the top of the positioning plate 2. The tops of the two positioning columns 3 are detachably connected to the same protective tube 4. The interior of the protective tube 4 is movably connected to a connecting plate 5. Positioning column holes are provided inside the protective tube 4 and the connecting plate 5. The two positioning columns 3 are both square columns in shape. The protective tube 4 and the connecting plate 5 are both located on the top of the chromatograph body 1 through the positioning columns 3.

[0023] The connection plate 5 is fixedly connected with a positioning cylinder 6 inside which an injection needle body 12 is placed. A positioning cavity is provided inside the positioning cylinder 6 and the injection needle body 12 is located inside the positioning cylinder 6 through the positioning cavity.

[0024] The top of the protective tube 4 is detachably connected to a limit seat 7 , an annular connecting groove is provided inside the limit seat 7 , and the limit seat 7 is located at the top of the protective tube 4 through the annular connecting groove.

[0025] Support rods 8 are hinged on the left and right sides of the limit seat 7, and the two support rods 8 are detachably connected to the positioning plate 2. The bottoms of the two support rods 8 are fixedly connected with plug-in blocks 9, and the top of the positioning plate 2 is fixedly connected with two L-shaped plates 10. The insides of the two L-shaped plates 10 are plugged with positioning pins, and the insides of the two L-shaped plates 10 are threaded with fastening screws 11. The two plug-in blocks 9 are plugged into the insides of the two L-shaped plates 10, and the two plug-in blocks 9 and the positioning plate 2 are detachably connected to the chromatograph body 1 through the fastening screws 11.

[0026] The inner part of the limiting seat 7 is rotatably connected with a screw rod 13 , the outer surface of the screw rod 13 is threadedly connected with a moving plate 14 , the top of the limiting seat 7 is fixedly connected with a limiting rod 15 , and the moving plate 14 is slidably connected with the limiting rod 15 .

[0027] The front of the movable plate 14 is elastically connected to a baffle 16, and the back of the baffle 16 is fixedly connected to a limiting column 17. A sliding groove is provided inside the movable plate 14, and the limiting column 17 slides inside the movable plate 14 through the sliding groove. A U-shaped groove 18 is provided inside the limiting column 17, and the limiting column 17 is clamped with the push rod of the injection needle body 12 through the U-shaped groove 18.

[0028] In this embodiment, by setting the two positioning columns 3 as square columns, after the connecting plate 5 is placed inside the protective tube 4, the positioning tube 6 is not easy to rotate, ensuring that the subsequent limit seat 7 is fixed more securely after being tightened, and the injection needle body 12 is more convenient to insert.

[0029] In this embodiment, the push rod inside the injection needle body 12 is driven downward by rotating the screw 13, thereby achieving a sense of weakness when the hand is pressed, ensuring that a relatively thick liquid is injected without much effort.

[0030] The working principle of the above embodiment is:

[0031] The protective structure of the gas chromatograph is as follows: when the injection needle body 12 is inserted into the injection hole, the positioning plate 2 is placed on the top of the chromatograph body 1, the protective tube 4 is located on the top of the positioning column 3, and the positioning tube 6 is pressed inside the protective tube 4, and the limiting seat 7 is located on the top of the protective tube 4. After the two support rods 8 are rotated, the two plug-in blocks 9 are plugged into the inside of the two L-shaped plates 10, and the two positioning pins are used for limiting. At this time, the two fastening screws 11 are tightened and extend through the positioning plate 2 to the inside of the chromatograph body 1, and the position below the limiting seat 7 is tightened. The components can be fixed and supported; the injection needle body 12 is placed inside the positioning cylinder 6, and the screw 13 is rotated to drive the movable plate 14 to move, so that the limiting column 17 inside the movable plate 14 can be connected to the push rod at the top of the injection needle body 12, and the push rod is limited by the U-shaped groove 18 inside the limiting column 17, and finally the screw 13 is rotated to drive the movable plate 14 to move downward under the condition of the limiting rod 15, so that the liquid inside the injection needle body 12 can be more conveniently injected into the inside of the chromatograph body 1, thereby improving the experience of using the device.

[0032] It should be noted that the standard parts used in the application can be purchased from the market, special-shaped parts can be customized according to the description in the specification and drawings, and the specific connection methods of each part adopt mature bolts, rivets, welding, etc. in the prior art, and conventional means. Machinery, parts and equipment all adopt conventional models in the prior art; plus the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] 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 protective structure for a gas chromatograph, comprising a chromatograph body (1), characterized in that: A protective component is provided on the top of the chromatograph body (1); The protective assembly comprises a positioning plate (2), wherein the positioning plate (2) is mounted on the top of the chromatograph body (1), wherein two positioning columns (3) are fixedly connected to the top of the positioning plate (2), wherein the tops of the two positioning columns (3) are detachably connected to the same protective tube (4), wherein the interior of the protective tube (4) is movably connected to a connecting plate (5), wherein the interior of the connecting plate (5) is fixedly connected to a positioning tube (6), wherein the interior of the positioning tube (6) is provided with an injection needle body (12), wherein the top of the protective tube (4) is detachably connected to a limiting seat (7), wherein the left and right sides of the limiting seat (7) are both hingedly connected to support rods (8), wherein the two support rods (8) are detachably connected to the positioning plate (2), wherein the interior of the limiting seat (7) is rotatably connected to a screw rod (13), wherein the outer surface of the screw rod (13) is threadedly connected to a movable plate (14), wherein the front surface of the movable plate (14) is elastically connected to a baffle plate (16), wherein the back surface of the baffle plate (16) is fixedly connected to a limiting column (17).

2. The protective structure of a gas chromatograph according to claim 1, characterized in that: The protective tube (4) and the connecting plate (5) are both provided with positioning column holes, the two positioning columns (3) are both in the shape of square columns, and the protective tube (4) and the connecting plate (5) are both located on the top of the chromatograph body (1) through the positioning columns (3).

3. The protective structure of a gas chromatograph according to claim 1, characterized in that: An annular connecting groove is provided inside the limit seat (7), and the limit seat (7) is located at the top of the protective tube (4) through the annular connecting groove. The bottoms of the two support rods (8) are fixedly connected with plug-in blocks (9), and the top of the positioning plate (2) is fixedly connected with two L-shaped plates (10), and the two plug-in blocks (9) are plugged into the inside of the two L-shaped plates (10).

4. The protective structure of a gas chromatograph according to claim 3, characterized in that: The interiors of the two L-shaped plates (10) are both plugged with positioning pins, the interiors of the two L-shaped plates (10) are both threadedly connected with fastening screws (11), and the two plug-in blocks (9) and the positioning plates (2) are both detachably connected to the chromatograph body (1) via the fastening screws (11).

5. The protective structure of a gas chromatograph according to claim 1, characterized in that: A positioning cavity is provided inside the positioning cylinder (6), and the injection needle body (12) is located inside the positioning cylinder (6) through the positioning cavity. The top of the limiting seat (7) is fixedly connected to a limiting rod (15), and the movable plate (14) is slidably connected to the limiting rod (15).

6. The protective structure of a gas chromatograph according to claim 1, characterized in that: A sliding groove is provided inside the movable plate (14), and the limiting column (17) slides inside the movable plate (14) through the sliding groove. A U-shaped groove (18) is provided inside the limiting column (17), and the limiting column (17) is clamped with the push rod of the injection needle body (12) through the U-shaped groove (18).

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