Gas chromatograph

Abstract

The utility model relates to a gas chromatograph which comprises a machine body and a control panel, a sample injector interface and a detector interface are arranged in the machine body, a plurality of internal thread sleeves are respectively arranged on the sample injector interface and the detector interface, a top plate and a baffle I are arranged on the outer sides of the internal thread sleeves, and a magnet ring is arranged on the surface of the top plate. A plurality of first clamping teeth are arranged on the outer sides of the internal thread sleeves, the rotary knob pieces are arranged between the internal thread sleeves and the top plate respectively, the extending units are arranged in the rotary knob pieces, and the limiting pieces are arranged between the rotary knob pieces and the extending units respectively. The knob piece is arranged on the base, the extension unit and the limiting piece are arranged on the knob piece, the knob piece is matched with the first clamping teeth and the magnet ring for use, and after the fastening operation on the chromatographic column fastening nut is achieved through the knob piece, the angle of the nut which is slightly tightened can be limited by adjusting the extension unit and limiting the position of the limiting piece.

Description

Technical Field

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

[0002] Gas chromatograph is a chemical analysis instrument used to separate and detect gases and volatile organic compounds. It uses a chromatographic column to separate the components in a gas mixture, and then detects and measures the separated components through a detector. It is widely used in chemistry, biology, food, environmental protection and other fields.

[0003] The capillary column generally used in the gas chromatograph contains a fixed phase for separating different components in the sample. During the installation of the column, the column needs to be installed on a capillary bracket, and then nuts and graphite pads are put on both ends of the column respectively, and connected to the injector interface and the detector interface in sequence with a certain length, and then the nuts are respectively connected to the injector interface and the detector interface and lightly tightened to prevent air leakage at the connection. The purpose of light tightening is to prevent the column from breaking. However, when performing the light tightening operation, the staff is always required to use tools such as wrenches to operate, which is inconvenient. In addition, since there is a certain vibration during the startup and operation of the instrument, the vibration frequency may cause the nut to loosen after light tightening, which is not conducive to use. Utility Model Content

[0004] Based on the above description, the utility model provides a gas chromatograph to solve the problem that the existing gas chromatograph is inconvenient to tighten during use and there is a risk of loosening of the nut after tightening.

[0005] The utility model provides a technical solution to the above technical problems as follows: a gas chromatograph, comprising a body and a control panel, wherein an injector interface and a detector interface are arranged in the body, and a plurality of internally threaded sleeves are respectively arranged on the injector interface and the detector interface, a top plate and a baffle are arranged on the outer side of the internally threaded sleeve, a magnet ring is arranged on the surface of the top plate, a plurality of latching teeth are arranged on the outer side of the internally threaded sleeve, a plurality of knob members are respectively arranged between the plurality of internally threaded sleeves and the top plate for tightening nuts, a plurality of extension units are all arranged in the knob member for limiting the position of the nut after tightening, and a plurality of limit members are respectively arranged between the plurality of knob members and the extension unit for limiting the position between the extension unit and the knob member.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the knob member includes a ring, a base plate and a plurality of convex plates, the ring is sleeved on the outside of the internal threaded sleeve, the surface of the ring is provided with a plurality of latch teeth 2, the base plate is provided at the bottom end of the ring, the plurality of convex plates are provided on the bottom surface of the base plate, the interior of the convex plate is provided as a cavity and a plurality of openings 1 are provided through the surface.

[0008] Furthermore, the extension unit includes a baffle plate 2, a surface of the baffle plate 2 is penetrated with a plurality of openings 2, and a surface of the baffle plate 2 is provided with protrusions.

[0009] Furthermore, the limiting member includes a limiting plate, a connecting plate is provided on the surface of the limiting plate, and the limiting plate is inserted between the first opening and the second opening.

[0010] Furthermore, the outer surface of the bottom plate is engraved with anti-slip patterns.

[0011] Furthermore, a magnet block is provided on the surface of the connecting plate, and the surface of the magnet block is in contact with the surface of the convex plate.

[0012] Furthermore, an arc-shaped plate is provided on the surface of the connecting plate, and a cavity is left between the inner side of the arc-shaped plate and the connecting plate.

[0013] Furthermore, the corners of the limiting plate away from the connecting plate are all rounded in design.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] By arranging an internal threaded sleeve and a knob part at the sample injector interface and the detector interface, arranging an extension unit and a limit part on the knob part, and utilizing the knob part in conjunction with a latch tooth and a magnet ring, after utilizing the knob part to realize the knob tightening operation of the chromatographic column fastening nut, the position of the extension unit can be adjusted, and the position of the limit part can be limited, thereby realizing the angle limitation of the lightly tightened nut, thereby avoiding the accidental loosening of the nut due to the vibration generated by the operation of the machine body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the machine body of the utility model;

[0018] Figure 3 It is a schematic diagram of the explosion structure between the internal thread sleeve and the knob member of the utility model;

[0019] Figure 4 It is a schematic diagram of the explosion structure between the extension unit and the limiting member of the utility model;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the knob of the utility model;

[0021] Figure 6 It is a three-dimensional structural diagram of the extension unit of the present utility model;

[0022] Figure 7 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Machine body; 11. Injector interface; 12. Detector interface; 2. Control panel; 3. Internal threaded sleeve; 31. Top plate; 311. Magnet ring; 32. Gear 1; 33. Baffle 1; 4. Knob; 41. Ring; 411. Gear 2; 42. Bottom plate; 43. Protruding plate; 431. Opening 1; 5. Extension unit; 51. Baffle 2; 511. Opening 2; 512. Protruding block; 6. Limiting member; 61. Limiting plate; 611. Connecting plate; 7. Magnet block; 8. Arc plate. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] This embodiment provides a gas chromatograph, which is more convenient when installing a chromatographic column, and can also limit the tightening nut to prevent the nut from loosening after being lightly tightened. Specifically, Figure 1-7As shown, it includes a body 1, a control panel 2, two internally threaded sleeves 3, a knob 4, an extension unit 5 and a plurality of stoppers 6. An injector interface 11 and a detector interface 12 are arranged in the body 1. The two internally threaded sleeves 3 are respectively threadedly connected to the injector interface 11 and the detector interface 12. The internally threaded sleeve 3 is designed as a cylindrical structure and a top plate 31 is arranged at a position near the top of the outer side. A baffle 33 is arranged at a position near the bottom of the internally threaded sleeve 3. A groove is provided on the surface of the top plate 31, and a magnet ring 311 is arranged on the inner side. A plurality of latch teeth 33 are arranged at equal distances along a ring on the outer side of the internally threaded sleeve 3. 2, two knobs 4 are respectively arranged between the two internal thread sleeves 3 and the top plate 31, the knob 4 includes a collar 41, a bottom plate 42 and two convex plates 43, the collar 41 is sleeved on the outside of the internal thread sleeve 3, the top of the collar 41 is in contact with the surface of the magnet ring 311 for adsorption, the surface of the collar 41 is provided with a plurality of second latch teeth 411, the plurality of second latch teeth 411 are respectively engaged with the plurality of first latch teeth 32, the bottom plate 42 is arranged at the bottom end of the collar 41, the outer surface of the bottom plate 42 is engraved with anti-slip lines, the two convex plates 43 are respectively arranged on the bottom surface of the bottom plate 42, the interior of the convex plate 43 is set as a cavity along the vertical direction, and the surface The surface of the knob 4 is provided with two openings 431 in the same straight line in the horizontal direction, a space is reserved between the two convex plates 43, and the reserved space is adapted to the diameter of the nut used for fastening, a plurality of extension units 5 are respectively arranged in the cavity of the convex plate 43 included in the knob 4, the extension unit 5 includes a baffle plate 51, the surface of the baffle plate 51 is provided with two openings 511 with a diameter equal to the opening 431, a convex block 512 is provided on the surface of the baffle plate 51, one side of the plurality of convex blocks 512 is respectively in the same plane with the opposite sides of the two convex plates 43 close to each other, and a plurality of limit members 6 are respectively arranged on the plurality of knobs. Between the convex plate 43 included in the button member 4 and the extension unit 5, the limit member 6 includes a limit plate 61, and the surface of the limit plate 61 is provided with a connecting plate 611, and the limit plate 61 is inserted between the opening 1 431 and the opening 2 511, so that the adjusted knob member 4 and the fastening nut can be effectively corresponded to each other, so that the staff can more quickly and conveniently perform the light tightening operation on the fastening nut through the knob member 4, and at the same time, the position of the extension unit 5 can be adjusted and the position limit can be achieved by using the limit member 6, and the nut after light tightening can be limited to avoid loosening due to the vibration of the machine body 1 during operation.

[0028] In order to ensure the stability of the limiting member 6 during use, Figure 3-4 As shown, in this embodiment, a magnet block 7 is provided on the surface of the connecting plate 611, and the surface of the magnet block 7 is in contact with and adsorbed on the surface of the convex plate 43, so that the adsorption effect between the magnet block 7 and the convex plate 43 can be effectively utilized to ensure the stability of the limit member 6 inserted in the opening 1 431 and the opening 2 511 to prevent sliding and falling.

[0029] like Figure 3-4 As shown, in this embodiment, a curved plate 8 is provided on the surface of the connecting plate 611 , and a cavity is left between the inner side of the curved plate 8 and the connecting plate 611 , so that it is more convenient for the staff to grasp and press the limiting member 6 for adjustment.

[0030] In order to facilitate the staff to insert the disassembled stopper 6 into the opening 1 431 and the opening 2 511 again, Figure 4 As shown, in this embodiment, the corners of the limiting plate 61 away from the connecting plate 611 are all rounded.

[0031] Before using the above-mentioned gas chromatograph, if it is necessary to connect the end of the chromatographic column to the injector interface 11 and the detector interface 12 respectively, the staff can first set the nut and the matching graphite gasket on one end of the chromatographic column, and then use a cutter to cut off a part of the top of the chromatographic column to prevent clogging by foreign matter, and then insert one end of the chromatographic column into the injector interface 11, and turn the knob between the nut and the injector interface 11 to achieve a preliminary connection, and then the staff can grasp the bottom plate 42 of the knob member 4 and press and slide downward to separate the ring 41 and the magnet ring 311, and move the latch tooth 1 32 and the latch tooth 2 411 away from each other, and slide the two convex plates 43 to the outside of the nut, and the bottom plate 42 contacts the top surface of the baffle 1 33, and then continue to grasp the bottom plate 42 to apply pressure The knob can be turned to achieve a light tightening effect between the nut and the injector interface 11 through the convex plate 43. Then the staff can connect the other end of the chromatographic column to the detector interface 12 using the nut again according to the above description. Finally, the staff can grab the arc plate 8 to pull the limit plate 61 outward, so that the baffle plate 2 51 located in the cavity of the convex plate 43 slides downward, so that the other opening 2 511 opened on the surface of the baffle plate 2 51 corresponds to the position of the opening 1 431, and the baffle plate 2 51 contacts the outer side of the tightened nut, and then the limit plate 61 is inserted again, so that the magnet block 7 and the convex plate 43 are adsorbed on each other, and finally the bottom plate 42 is grabbed again and slides upward, so that the latch tooth 1 32 and the latch tooth 2 411 are meshed again, and the ring 41 is adsorbed on the magnet ring 311 again.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas chromatograph, comprising a body (1) and a control panel (2), wherein the body (1) is provided with an injector interface (11) and a detector interface (12), characterized in that: A plurality of internally threaded sleeves (3) are respectively arranged on the sample injector interface (11) and the detector interface (12); a top plate (31) and a baffle plate (33) are arranged on the outer side of the internally threaded sleeve (3); a magnet ring (311) is arranged on the surface of the top plate (31); and a plurality of latch teeth (32) are arranged on the outer side of the internally threaded sleeve (3); A plurality of knobs (4) are respectively arranged between the plurality of internally threaded sleeves (3) and the top plate (31) and are used for tightening the nuts; A plurality of extension units (5) are arranged in the knob member (4) and are used to limit the position of the nut after tightening; A plurality of position limiting members (6) are respectively arranged between a plurality of the knob members (4) and the extension units (5) and are used to limit the position between the extension units (5) and the knob members (4).

2. A gas chromatograph according to claim 1, characterized in that: The knob member (4) comprises a collar (41), a bottom plate (42) and a plurality of convex plates (43); the collar (41) is sleeved on the outer side of the internal thread sleeve (3); a plurality of second latch teeth (411) are provided on the surface of the collar (41); the bottom plate (42) is arranged at the bottom end of the collar (41); the plurality of convex plates (43) are arranged on the bottom surface of the bottom plate (42); the interior of the convex plate (43) is arranged as a cavity and a plurality of first openings (431) are provided through the surface.

3. A gas chromatograph according to claim 1, characterized in that: The extension unit (5) comprises a second baffle plate (51), a surface of which is penetrated by a plurality of second openings (511), and a surface of which is provided with a protrusion (512).

4. A gas chromatograph according to claim 1, characterized in that: The limiting member (6) comprises a limiting plate (61), a surface of the limiting plate (61) is provided with a connecting plate (611), and the limiting plate (61) is inserted between the first opening (431) and the second opening (511).

5. A gas chromatograph according to claim 2, characterized in that: The outer surface of the bottom plate (42) is engraved with anti-slip patterns.

6. A gas chromatograph according to claim 4, characterized in that: A magnet block (7) is provided on the surface of the connecting plate (611), and the surface of the magnet block (7) is in contact with the surface of the convex plate (43).

7. A gas chromatograph according to claim 6, characterized in that: An arc-shaped plate (8) is provided on the surface of the connecting plate (611), and a cavity is left between the inner side of the arc-shaped plate (8) and the connecting plate (611).

8. A gas chromatograph according to claim 4, characterized in that: The corners of the limiting plate (61) away from the connecting plate (611) are all designed to be rounded.

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