CN220357003U

CN220357003U - Sampling device for gas chromatograph

Info

Publication number: CN220357003U
Application number: CN202321769827.XU
Authority: CN
Inventors: 方良华; 刘程祥; 李媛
Original assignee: Beijing Naisi Xingye Science And Trade Co ltd
Current assignee: Beijing Naisi Xingye Science And Trade Co ltd
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2024-01-16
Anticipated expiration: 2033-07-06

Abstract

The utility model discloses a sample injection device for a gas chromatograph, which relates to the technical field of gas chromatographs, and comprises: unable adjustment base still includes: the support frame is used for supporting the sample feeding pipe, the support frame is symmetrically installed at the top of the fixed base, and a fixed assembly is movably inserted into the inner side wall of the support frame and close to the top. According to the utility model, the fixing bolt is rotated anticlockwise to be separated from the outer side wall of the support frame through the outer side wall of the threaded column, then the rotary sample inlet tube is rotated for 180 degrees, the sample inlet tube after the position adjustment can be fixed through rotating the fixing bolt and the limiting ring clockwise, the third fixing plate is driven by the electric telescopic rod to move to the push rod part of the sample inlet tube to be discharged, the push rod part of the sample inlet tube is clamped and fixed through the clamping groove, and then the slide block moves upwards on the slide rail of the sliding cylinder, so that the push rod part of the sample inlet tube can be synchronously driven to move upwards in the inner cavity of the sample inlet tube, and the air in the inner cavity of the sample inlet tube can be discharged.

Description

Sampling device for gas chromatograph

Technical Field

The utility model relates to the technical field of gas chromatographs, in particular to a sample injection device for a gas chromatograph.

Background

With the continuous research of gases, the analysis of collected gases by using a gas chromatograph has become a common technical means. Gas chromatographs are instruments that utilize chromatographic separation techniques and detection techniques to perform qualitative and quantitative analysis of complex mixtures of multiple components. It is generally useful for analyzing organic substances, such as volatile organic compounds, organic chlorides, organic phosphates, polycyclic aromatic hydrocarbons, phthalate esters, etc., which are thermally stable in the soil and have a boiling point of not more than 500 ℃.

The utility model discloses a chinese patent of publication No. CN218003338U discloses a sampling device that gas chromatograph used, including the device main part, the outer wall mark of device main part has the scale mark, the one end fixedly connected with screwed pipe of device main part, the outer wall threaded connection of screwed pipe has the screw fixture block, the outer wall fixedly connected with fixed block of screw fixture block, the outer wall laminating of fixed block is connected with the lantern ring, the outer wall fixedly connected with fishplate bar of lantern ring, the outer wall fixedly connected with bracing piece of fishplate bar, the one end bearing connection of bracing piece has the pivot, the outer wall fixedly connected with locating lever of pivot. This sampling device that gas chromatograph was used can be convenient for install in dismantling of device, is convenient for wash it, can be convenient for protect the device, can let the device portable, because the gas chromatograph sampling device is comparatively little, can make it drop when carrying, can increase the user to the holding of device through annular handle.

With respect to the related art in the above, the inventors consider that there are the following drawbacks: when the sample injector is sampled by the existing device, a small amount of air can enter the sample injector, the structure of the existing device is single, and the air in the sample injector cannot be discharged, so that sample injection errors can be generated, and the sample injection device for the gas chromatograph is provided for solving the problems.

Disclosure of Invention

The utility model provides a sample injection device for a gas chromatograph, which has the advantage of being capable of exhausting air in the sample injector, so as to solve the problems that a small amount of air enters the sample injector when the sample injector is sampled by the conventional device, the conventional device has a single structure, and the air in the sample injector cannot be exhausted, so that sample injection errors can be generated.

In order to realize the purpose of exhausting the air in the sample injector, the utility model provides the following technical scheme: a sample injection device for a gas chromatograph, comprising: unable adjustment base still includes: the support frame for supporting the sampling tube, the support frame symmetry is installed unable adjustment base top, the support frame inside wall just is close to the activity of top and has pegged graft and have fixed subassembly, fixed subassembly is used for carrying out the centre gripping to the sampling tube fixedly, unable adjustment base top just is located support frame one side fixed mounting has drive assembly, drive assembly passes through the reciprocates mode to realize the air discharge in the sampling tube.

As a preferable technical scheme of the utility model, a plugging hole for plugging the fixing component is formed in a position, close to the top, of one side wall of the support frame, and a second limiting groove for limiting the fixing component is formed in one side of the support frame and located in the plugging hole.

As a preferable technical scheme of the utility model, the fixing component comprises a connecting rod movably inserted into the inner cavity of the insertion hole, a clamping plate is fixedly arranged at one end of the connecting rod, which is close to the sample injection tube, a threaded column is fixedly arranged at the other end of the connecting rod, and a fixing bolt is movably arranged on the outer side wall of the threaded column.

As a preferable technical scheme of the utility model, the side wall of the inner cavity of the fixing bolt is provided with a thread bulge which is consistent with the thread of the outer side wall of the thread column, and the thread bulge and the thread of the outer side wall of the thread column are the same in size.

As a preferable technical scheme of the utility model, the fixing assembly further comprises a limiting ring movably mounted on the outer side wall of the threaded column, the limiting ring and the fixing bolt are integrally formed, and the limiting ring and the second limiting groove are identical in size.

As a preferable technical scheme of the utility model, the driving assembly comprises a sliding cylinder fixedly arranged at the top of the fixed base, a motor is fixedly arranged at the top of the sliding cylinder, a sliding block is movably arranged in a sliding rail inner cavity of the sliding cylinder, a first fixed plate is fixedly arranged on one side wall of the sliding block, a second fixed plate is fixedly arranged on one side wall of the first fixed plate, a third fixed plate is movably inserted in the inner cavity of the second fixed plate, an electric telescopic rod is fixedly arranged on one side wall of the first fixed plate and positioned on two sides of the second fixed plate, the output end of the electric telescopic rod is fixedly connected with the outer side wall of the third fixed plate through a fixed block, and a clamping groove for clamping a push rod part of the sample injection tube is formed in one end of the third fixed plate.

As a preferable technical scheme of the utility model, the driving assembly further comprises a first limiting groove formed in the outer side wall of the second fixing plate, a limiting block is movably inserted into the inner cavity of the first limiting groove, and one side wall of the limiting block is fixedly connected with the side wall of the third fixing plate.

Compared with the prior art, the utility model provides the sample injection device for the gas chromatograph, which has the following beneficial effects:

1. this sampling device for gas chromatograph rotates fixing bolt anticlockwise through the screw thread post lateral wall, makes it break away from with the support frame lateral wall, then rotates the sampling tube, and after the sampling tube rotated 180, the sampling tube syringe needle was up this moment, and after the adjustment of sampling tube direction was accomplished, through clockwise rotation fixing bolt and spacing ring to with the second spacing groove inner chamber surface when laminating to can fix the sampling tube after the adjustment position.

Then through electric telescopic handle drive third fixed plate towards advance the injection tube direction and remove to advance injection tube push rod portion in second fixed plate inner chamber, through seting up the joint groove at third fixed plate one end, thereby can carry out the joint to advance injection tube push rod portion fixedly, and then can make advance injection tube push rod portion and third fixed plate form a whole, then upwards move on the slip cylinder slide rail through the slider, thereby can drive advance injection tube push rod portion in advance injection tube inner chamber simultaneously and upwards move, so as to realize can advance injection tube inner chamber's air discharge, then through advance the scale mark of injection tube lateral wall, observe advance injection tube inner chamber air and whether completely by the discharge.

2. This sampling device for gas chromatograph has seted up first spacing groove through the second fixed plate lateral wall to the stopper that a lateral wall and third fixed plate lateral wall are fixed to link to each other is pegged graft in first spacing groove inner chamber, thereby can prevent that third fixed plate from sliding out from the second fixed plate inner chamber.

Drawings

FIG. 1 is a schematic diagram of a sample injection device for a gas chromatograph according to the present utility model;

FIG. 2 is a schematic side view of the present utility model;

FIG. 3 is a schematic view of the structure of the support frame of the present utility model;

FIG. 4 is a schematic view of a fixing assembly according to the present utility model;

FIG. 5 is a schematic diagram of a driving assembly according to the present utility model;

FIG. 6 is a schematic cross-sectional view of a driving assembly according to the present utility model;

fig. 7 is an enlarged view of the part a of fig. 6 according to the present utility model.

In the figure: 1. a fixed base; 2. a support frame; 3. a fixing assembly; 301. a connecting rod; 302. a clamping plate; 303. a threaded column; 304. a fixing bolt; 305. a limiting ring; 4. a drive assembly; 401. a sliding cylinder; 402. a motor; 403. a slide block; 404. a first fixing plate; 405. a second fixing plate; 406. a third fixing plate; 407. an electric telescopic rod; 408. a clamping groove; 409. a first limit groove; 410. a limiting block; 5. a plug hole; 6. and the second limit groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, the utility model discloses a sample injection device for a gas chromatograph, comprising: unable adjustment base 1 still includes: a support frame 2 for supporting advance the pipe, support frame 2 symmetry installs unable adjustment base 1 top, and support frame 2 inside wall just is close to the activity of top and peg graft there is fixed subassembly 3, and fixed subassembly 3 is used for carrying out the centre gripping to advance the pipe fixedly, and unable adjustment base 1 top just is located support frame 2 one side fixed mounting and has drive assembly 4, and drive assembly 4 passes through the reciprocate mode to realize the air discharge in the pipe that will advance.

Specifically, a side wall of the support frame 2 is provided with a plug hole 5 close to the top position for plugging the fixed assembly 3, and a second limit groove 6 for limiting the fixed assembly 3 is formed in one side of the support frame 2 and located at the plug hole 5.

In this embodiment, through offer at support frame 2 a side wall and be close to the spliced eye 5 of top position to can provide the fixed space for fixed subassembly 3, through offer at support frame 2 one side and be located the second spacing groove 6 of spliced eye 5 position, thereby can carry out spacing fixed to fixed subassembly 3 after the adjustment position.

Specifically, the fixing component 3 comprises a connecting rod 301 movably inserted in the inner cavity of the insertion hole 5, a clamping plate 302 is fixedly arranged at one end of the connecting rod 301 close to the sample injection tube, a threaded column 303 is fixedly arranged at the other end of the connecting rod 301, and a fixing bolt 304 is movably arranged on the outer side wall of the threaded column 303;

the inner cavity side wall of the fixing bolt 304 is provided with a threaded bulge which is in threaded consistency with the outer side wall of the threaded column 303, and the threaded bulge and the outer side wall of the threaded column 303 are the same in size.

In this embodiment, connect in the connecting rod 301 through spliced eye 5 inner chamber to can provide the fixed space for the joint plate 302 of the fixed sampling tube lateral wall of joint, through the screw thread post 303 of welding at the connecting rod 301 other end, and screw thread post 303 lateral wall rotates has the inner chamber lateral wall offered with screw thread protruding and the same fixing bolt 304 of size of screw thread post 303 lateral wall screw thread unanimity, when needing to adjust the sampling tube direction, at first on screw thread post 303 lateral wall anticlockwise rotation fixing bolt 304 towards outside, thereby can make connecting rod 301 can rotate at spliced eye 5 inner chamber, and then can make things convenient for the user to adjust the sampling tube direction, after the sampling tube direction adjustment is accomplished, through anticlockwise rotation fixing bolt 304 to when laminating with support frame 2 lateral wall surface, thereby can carry out spacingly to the sampling tube after the adjustment position.

Specifically, the fixing assembly 3 further includes a limiting ring 305 movably mounted on the outer side wall of the threaded post 303, the limiting ring 305 and the fixing bolt 304 are integrally formed, and the limiting ring 305 and the second limiting groove 6 have the same size.

In this embodiment, the outer sidewall of the threaded post 303 rotates to form a stop collar 305 integrally with the fixing bolt 304, and the stop collar 305 and the second stop slot 6 have the same size, so that after the direction adjustment of the sample tube is completed, the sample tube after the position adjustment can be fixed by rotating the fixing bolt 304 and the stop collar 305 clockwise until the sample tube is attached to the inner cavity surface of the second stop slot 6.

Specifically, the driving component 4 comprises a sliding cylinder 401 fixedly installed at the top of the fixed base 1, a motor 402 is fixedly installed at the top of the sliding cylinder 401, a sliding block 403 is movably installed in an inner cavity of a sliding rail of the sliding cylinder 401, a first fixing plate 404 is fixedly installed on one side wall of the sliding block 403, a second fixing plate 405 is fixedly installed on one side wall of the first fixing plate 404, a third fixing plate 406 is movably inserted into an inner cavity of the second fixing plate 405, an electric telescopic rod 407 is fixedly installed on one side wall of the first fixing plate 404 and located on two sides of the second fixing plate 405, an output end of the electric telescopic rod 407 is fixedly connected with an outer side wall of the third fixing plate 406 through a fixing block, and a clamping groove 408 for clamping a pushing rod portion of a sample injection pipe is formed in one end of the third fixing plate 406.

In this embodiment, the sliding cylinder 401 is welded on the top of the fixing base 1, so that a space can be provided for the motor 402, a fixing space can be provided for the first fixing plate 404 through the sliding block 403 inserted in the sliding rail inner cavity of the sliding cylinder 401, a side wall of the first fixing plate 404 is welded through the second fixing plate 405, the third fixing plate 406 is inserted in the inner cavity of the second fixing plate 405, meanwhile, the output end is welded on the side wall of the first fixing plate 404 through the electric telescopic rod 407 fixedly connected with the outer side wall of the third fixing plate 406 and is positioned on two sides of the second fixing plate 405, so that the third fixing plate 406 can be driven by the electric telescopic rod 407 to move towards the direction of the sample injection tube in the inner cavity of the second fixing plate 405, and the push rod part of the sample injection tube can be clamped and fixed through the clamping groove 408 formed at one end of the third fixing plate 406.

Specifically, the driving assembly 4 further includes a first limiting groove 409 formed on an outer side wall of the second fixing plate 405, a limiting block 410 is movably inserted into an inner cavity of the first limiting groove 409, and a side wall of the limiting block 410 is fixedly connected with a side wall of the third fixing plate 406.

In this embodiment, the first limiting groove 409 is formed through the outer side wall of the second fixing plate 405, and the limiting block 410, which is fixedly connected with the side wall of the third fixing plate 406, is inserted into the inner cavity of the first limiting groove 409, so as to prevent the third fixing plate 406 from sliding out of the inner cavity of the second fixing plate 405.

The working principle and the using flow of the utility model are as follows: when the air in the inner cavity of the sample injection tube is required to be discharged after the sample injection tube is sampled, the fixing bolt 304 is firstly rotated anticlockwise on the outer side wall of the threaded column 303 to be separated from the outer side wall of the support frame 2, so that the connecting rod 301 can be rotated in the inner cavity of the inserting hole 5, as one end of the connecting rod 301 is welded with the clamping plates 302, the sample injection tube can be clamped and fixed through the two groups of clamping plates 302, when the connecting rod 301 rotates, the position of the sample injection tube can be synchronously rotated, after the sample injection tube rotates 180 degrees, the needle head of the sample injection tube faces upwards, the fixing bolt 304 is rotated clockwise through the outer side wall of the threaded column 303, the limiting ring 305 integrally formed with the fixing bolt 304 is rotated on the outer side wall of the threaded column 303, meanwhile, the limiting ring 305 and the second limiting groove 6 are identical in size, and after the direction of the sample injection tube is adjusted, the sample injection tube can be fixed through clockwise rotating the fixing bolt 304 and the limiting ring 305 until the inner cavity surface of the second limiting groove 6 is in an integral mode.

Then through the control switch at unable adjustment base 1 top, control opens slip cylinder 401, motor 402, electric telescopic handle 407 operation, because slider 403 pegging graft in slip cylinder 401 slide rail inner chamber, thereby can provide fixed space for first fixed plate 404, weld at a first fixed plate 404 lateral wall through second fixed plate 405, and third fixed plate 406 pegging graft in second fixed plate 405 inner chamber, the electric telescopic handle 407 that the output was fixed continuous through fixed block and third fixed plate 406 lateral wall welds at a first fixed plate 404 lateral wall and is located second fixed plate 405 both sides simultaneously, thereby can drive third fixed plate 406 through electric telescopic handle 407 and move to the injection tube push rod portion in second fixed plate 405 inner chamber towards the injection tube direction and go out, through seting up the joint groove 408 in third fixed plate 406 one end, thereby can carry out the joint fixed to injection tube push rod portion, and then can make injection tube push rod portion and third fixed plate 406 form a whole, then upwards move on slip cylinder 401 slide rail through slider 403, thereby can drive injection tube push rod portion upwards and remove in the pipe inner chamber, whether can realize the exhaust air of injection tube inner chamber, then be discharged by the complete injection tube lateral wall of air is completely through the scale line of the injection tube.

After the air in the inner cavity of the sample injection tube is completely discharged, the electric telescopic rod 407 synchronously drives the third fixing plate 406 to restore to the initial position in the inner cavity of the second fixing plate 405 through the control switch, then the sample injection tube is rotated 180 degrees again through anticlockwise rotation of the fixing bolt 304, at the moment, the needle head of the sample injection tube faces downwards, and then the fixing bolt 304 is rotated clockwise until the needle head is attached to the surface of the inner cavity of the second limiting groove 6, so that the sample injection tube after the position adjustment can be fixed.

It should be noted that in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A sample injection device for a gas chromatograph, comprising: unable adjustment base (1), its characterized in that still includes:

the support frame (2) for supporting the sampling tube, support frame (2) symmetry is installed unable adjustment base (1) top, support frame (2) inside wall just is close to the activity of top and peg graft there is fixed subassembly (3), fixed subassembly (3) are used for carrying out the centre gripping to the sampling tube fixedly, unable adjustment base (1) top just is located support frame (2) one side fixed mounting has drive assembly (4), drive assembly (4) are through the reciprocates mode to realize the air discharge in the sampling tube.

2. The sample introduction device for gas chromatograph according to claim 1, wherein: the utility model discloses a fixed subassembly, including support frame (2) and fixed subassembly (3), support frame (2) lateral wall just is close to the top position and has seted up and be used for pegging graft spliced eye (5) of fixed subassembly (3), support frame (2) one side just is located spliced eye (5) position is seted up and is used for right fixed subassembly (3) go on spacing second spacing groove (6).

3. The sample introduction device for gas chromatograph according to claim 2, wherein: the fixing assembly (3) comprises a connecting rod (301) movably inserted into the inner cavity of the insertion hole (5), a clamping plate (302) is fixedly arranged at one end, close to the sample injection tube, of the connecting rod (301), a threaded column (303) is fixedly arranged at the other end of the connecting rod (301), and a fixing bolt (304) is movably arranged on the outer side wall of the threaded column (303).

4. A sample injection device for a gas chromatograph according to claim 3, characterized in that: the inner cavity side wall of the fixing bolt (304) is provided with a thread bulge which is consistent with the thread of the outer side wall of the thread column (303), and the thread bulge and the thread of the outer side wall of the thread column (303) are the same in size.

5. A sample injection device for a gas chromatograph according to claim 3, characterized in that: the fixing assembly (3) further comprises a limiting ring (305) movably mounted on the outer side wall of the threaded column (303), the limiting ring (305) and the fixing bolt (304) are integrally formed, and the limiting ring (305) and the second limiting groove (6) are identical in size.

6. The sample introduction device for gas chromatograph according to claim 1, wherein: the driving assembly (4) comprises a sliding cylinder (401) fixedly mounted at the top of the fixed base (1), a motor (402) is fixedly mounted at the top of the sliding cylinder (401), a sliding block (403) is movably mounted in an inner cavity of a sliding rail of the sliding cylinder (401), a first fixed plate (404) is fixedly mounted on one side wall of the sliding block (403), a second fixed plate (405) is fixedly mounted on one side wall of the first fixed plate (404), a third fixed plate (406) is movably inserted into an inner cavity of the second fixed plate (405), an electric telescopic rod (407) is fixedly mounted on one side wall of the first fixed plate (404) and positioned on two sides of the second fixed plate (405), the output end of the electric telescopic rod (407) is fixedly connected with the outer side wall of the third fixed plate (406) through a fixed block, and a clamping groove (408) for clamping a push rod part of a sample injection pipe is formed in one end of the third fixed plate (406).

7. The sample introduction device for gas chromatograph according to claim 6, wherein: the driving assembly (4) further comprises a first limit groove (409) formed in the outer side wall of the second fixing plate (405), a limit block (410) is movably inserted into the inner cavity of the first limit groove (409), and one side wall of the limit block (410) is fixedly connected with the side wall of the third fixing plate (406).