CN218298151U

CN218298151U - Sample inlet structure of gas chromatograph

Info

Publication number: CN218298151U
Application number: CN202221080762.3U
Authority: CN
Inventors: 朱磊
Original assignee: Guangzhou Ankang Detection Technology Co ltd
Current assignee: Guangzhou Ankang Detection Technology Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2023-01-13
Anticipated expiration: 2032-05-07

Abstract

The utility model discloses a gas chromatograph's introduction port structure, including introduction port body and velocity of flow adjustment mechanism. The beneficial effects of the utility model are that: the utility model discloses a be provided with two filter respectively in the sample introduction groove is located the interior under the sample introduction pipe, and the filtration pore of the filter that is located the upside is greater than the filtration pore of the filter of downside, can filter the sample introduction gas, filters the particulate impurity in the gas, avoids causing the influence to the detection of gas chromatograph, and the filter passes through the magnetism of magnet one and magnet two to be fixed in T type recess, conveniently filters the sample introduction gas, also can in time change and clearance the filter simultaneously; through setting up flow rate adjustment mechanism, when using, through the handle that rotates both sides for the screw lead screw that the handle drove both sides rotates, and then makes the screw lead screw rotate at adjusting nut, drives the opening between two baffles then and enlarges and dwindles, thereby the gaseous velocity of flow of control, convenient operation.

Description

Sample inlet structure of gas chromatograph

Technical Field

The utility model relates to a sample inlet structure specifically is a gas chromatograph's sample inlet structure, belongs to chromatograph sample inlet technical field.

Background

The sample inlet is an important component of the gas chromatograph, and the function of the sample inlet is to introduce a sample to be analyzed into the gas chromatograph for sufficient vaporization and then enter a chromatographic separation system for analysis.

The existing sample inlet of the chromatograph has the following problems in use:

1) When gas sampling is carried out at a sample inlet of an existing chromatograph, particulate matters in the gas cannot be filtered, so that the particulate matters enter the chromatograph, a test result is influenced, and the chromatograph is damaged;

2) When the existing chromatograph sample inlet is used for gas sample introduction, the flow rate of the gas sample introduction can not be controlled according to actual test requirements, so that the test result is inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gas chromatograph's introduction port structure for solving above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose: a sample inlet structure of a gas chromatograph comprises

The gas chromatograph comprises a sample inlet pipe body, a sample inlet groove is arranged in the sample inlet pipe body, a sample inlet pipe is arranged in the upper side of the sample inlet groove, a connecting nut is fixedly arranged on the bottom wall of the lower end of the sample inlet pipe body, the lower end of the sample inlet groove is communicated with a sample inlet hole, and the sample inlet pipe body is connected with the gas chromatograph through the connecting nut;

the flow velocity adjusting mechanisms are arranged, symmetrically hinged to the lower positions in the sample feeding groove respectively, and the sample feeding speed is conveniently controlled by arranging the flow velocity adjusting mechanisms.

As the utility model discloses further scheme again: the sample inlet pipe body is located the inside fixed mosaic of upside of advance kind groove and has sealed ring one, and the central point of sealed ring one puts and is provided with the perforation, the syringe needle of advance kind pipe passes the perforation and extends to the downside of sealed ring one.

As the utility model discloses further scheme again: the sample introduction groove is located and is provided with two filter plates respectively in the inside under the sample introduction pipe, and the filtration pore of the filter plate located on the upper side is greater than that of the filter plate located on the lower side.

As a further aspect of the present invention: the middle position of one side wall of the filter plate is fixedly connected with a limiting block, and one side wall of the filter plate, which is far away from the limiting block, is fixedly connected with a mounting block, a first magnet is embedded on the side wall of the mounting block, which is close to the filter plate, and a T-shaped groove matched with the mounting block is arranged on the side wall of the sample inlet pipe body, which is close to the mounting block, and the T-shaped groove is communicated with the sample injection groove, a second magnet is embedded in the wall of one side of the T-shaped groove, a limit groove matched with the limit block is arranged on the side wall of one side, close to the limit block, of the sample injection pipe body, and an elastic gasket is arranged in the limit groove.

As a further aspect of the present invention: and a sealing gasket is arranged between the T-shaped groove and the mounting block.

As a further aspect of the present invention: flow rate control mechanism comprises articulated seat and the baffle of installing on the cell wall of advance kind groove both sides, two one side of articulated seat is rotated and is connected with the baffle, the baffle is kept away from under one side of articulated seat the inside spout that is provided with of lateral wall, and sliding connection has the slider in the spout, one side of slider is rotated and is connected with the screw lead screw, the screw lead screw level runs through the setting in one side lateral wall of introduction port body, and its one end of keeping away from the slider extends to outside the lateral wall of introduction port body to the rigid coupling has the handle, the inside scarf joint of lateral wall of introduction port body has adjusting nut, screw lead screw threaded connection is in adjusting nut.

As a further aspect of the present invention: and a second sealing washer is embedded in the side wall of one side, close to the threaded screw rod, of the sample injection groove.

The beneficial effects of the utility model are that:

1) The utility model discloses a be provided with two filter respectively in the sample introduction trench under the sample introduction pipe, the filtration pore of the filter that is located the upside is greater than the filtration pore of the filter of downside, can filter the sample introduction gas, filters the particulate impurity in the gas, avoids causing the influence to gas chromatograph's detection, and the filter passes through the magnetic attraction of magnet one and magnet two to be fixed in T type recess, conveniently filters the sample introduction gas, also can in time change and clear up the filter simultaneously;

2) The utility model discloses a set up flow rate adjustment mechanism, when using, through the handle that rotates both sides for the screw lead screw that the handle drove both sides rotates, and then makes the screw lead screw rotate at adjusting nut, drives the opening between two baffles then and opens greatly and dwindles, thereby controls gaseous velocity of flow, convenient operation.

Drawings

FIG. 1 is a schematic view of the sample inlet structure of the chromatograph of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is an enlarged structural diagram at B in fig. 2.

In the figure: 1. the sample inlet tube body, 2, the sample introduction groove, 3, a first sealing washer, 4, a sample introduction tube, 5, the filter plate, 6, a limiting block, 7, a limiting groove, 8, the installation block, 9, a second magnet, 10, a first magnet, 11, a sealing gasket, 12, a flow rate adjusting mechanism, 13, a connecting nut, 14, a sample introduction hole, 15, a hinged seat, 16, a baffle, 17, a sliding groove, 18, a sliding block, 19, a second sealing washer, 20, a threaded lead screw, 21, a handle, 22 and an adjusting nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to FIGS. 1 to 3, a sample inlet structure of a gas chromatograph includes

The gas chromatograph sampling device comprises a sample inlet pipe body 1, a sample inlet groove 2 is arranged in the sample inlet pipe body 1, a sample inlet pipe 4 is arranged in the upper side of the sample inlet groove 2, a connecting nut 13 is fixedly mounted on the bottom wall of the lower end of the sample inlet pipe body 1, a sample inlet hole 14 is communicated with the lower end of the sample inlet groove 2, and the sample inlet pipe body 1 is connected with the gas chromatograph through the connecting nut 13;

the flow velocity adjusting mechanisms 12 are provided with two flow velocity adjusting mechanisms which are symmetrically hinged to the lower position in the sample injection groove 2, and the sample injection speed is conveniently controlled by arranging the flow velocity adjusting mechanisms 12.

The embodiment of the utility model provides an in, the inside fixed scarf joint of upside that the introduction port body 1 is located introduction groove 2 has seal ring 3, and the central point of seal ring 3 puts and is provided with the perforation, the syringe needle of introduction pipe 4 passes the perforation and extends to seal ring 3's downside, when advancing the appearance, can guarantee the leakproofness of the 1 inside of introduction port body.

The embodiment of the utility model provides an in, sample introduction groove 2 is located into appearance pipe 4 under inside and is provided with two filters 5 respectively, and the filtration pore that is located the filtration pore 5 of upside is greater than the filtration pore of filtration pore 5 of downside, can filter the kind of gas of advancing, filters the particle impurity in the gas, avoids causing the influence to gas chromatograph's detection.

The embodiment of the utility model provides an in, one side lateral wall intermediate position fixedly connected with stopper 6 of filter 5, and its rigid coupling has installation piece 8 on keeping away from one side lateral wall of stopper 6, it has magnet 10 to scarf on the one side lateral wall that installation piece 8 is close to filter 5, sample inlet body 1 is close to one side lateral wall of installation piece 8 and offers and installs 8 matched with T type recesses, and T type recess and sample inlet groove 2 communicate with each other, the inside scarf joint of one side cell wall of T type recess has magnet two 9, sample inlet body 1 is provided with spacing groove 7 with stopper 6 matched with on being close to one side lateral wall of stopper 6, and is provided with the elastic washer in the spacing groove 7, when using, inserts T type recess with filter 5 through installation piece 8 in, and then inserts sample inlet groove 2 with it for stopper 6 presss from both sides tightly in spacing groove 7 through the elastic washer, and installation piece 8 is fixed in T type recess through the magnetic attraction effect of magnet one 10 and magnet two 9, conveniently filters the filter 5, also can in time change and clear up simultaneously.

In the embodiment of the utility model, soil is provided with sealed pad 11 between T type recess and the installation piece 8, avoids gaseous joint line from T type recess and installation piece 8 to spill over, prevents that the air from directly spilling into from the joint line simultaneously.

Example two

Referring to fig. 1 to 3, a sample inlet structure of a gas chromatograph includes

The sample injection device comprises a sample injection port pipe body 1, wherein a sample injection groove 2 is formed in the sample injection port pipe body 1, a sample injection pipe 4 is arranged in the upper side of the sample injection groove 2, a connecting nut 13 is fixedly installed on the bottom wall of the lower end of the sample injection port pipe body 1, a sample injection hole 14 is formed in the lower end of the sample injection groove 2 in a communicating mode, and the sample injection port pipe body 1 is connected with a gas chromatograph through the connecting nut 13;

The embodiment of the utility model provides an in, velocity of flow adjustment mechanism 12 comprises articulated seat 15 and baffle 16 of installing on the cell wall of sample feeding tank 2 both sides, two one side of articulated seat 15 is rotated and is connected with baffle 16, baffle 16 keeps away from under one side of articulated seat 15 inside being provided with spout 17 of lateral wall, and sliding connection has slider 18 in spout 17, one side of slider 18 is rotated and is connected with screw lead screw 20, screw lead screw 20 level runs through the setting in one side lateral wall of introduction port body 1, and its one end of keeping away from slider 18 extends to outside the lateral wall of introduction port body 1 to the rigid coupling has handle 21, the inside scarf joint of lateral wall of introduction port body 1 has adjusting nut 22, screw lead screw 20 threaded connection is in adjusting nut 22, when using, through the handle 21 of rotating both sides for handle 21 drives the screw lead screw 20 rotation of both sides, and then makes screw 20 rotate at adjusting nut 22, drives the opening between two baffles 16 and enlarges and reduces then, thereby control gaseous velocity of flow, convenient operation.

The embodiment of the utility model provides an in, the inside concatenation of one side lateral wall that advances the sample groove 2 and is close to screw lead screw 20 has seal ring two 19, can prevent that gas from spilling over along screw lead screw 20, guarantees the leakproofness of introduction port.

The working principle is as follows: when using this kind of gas chromatograph's introduction port structure, at first be connected introduction port body 1 with gas chromatograph through the coupling nut 13 that sets up, then let in gas in to introduction port body 1 through introduction pipe 4, gas at first filters through two filter 5 that set up, filter particulate matter in the gas, can avoid causing the influence to gas chromatograph's detection, in the use, handle 21 through rotating both sides, make handle 21 drive the screw lead screw 20 rotation of both sides, and then make screw lead screw 20 rotate at adjusting nut 22, then drive the opening between two baffles 16 and open greatly and reduce, thereby control gaseous velocity of flow, and convenient for operation, and can dismantle between filter 5 and the introduction port body 1, can in time change and clear up filter 5.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A sample inlet structure of a gas chromatograph is characterized by comprising

The gas chromatograph sampling device comprises a sample inlet pipe body (1), wherein a sample inlet groove (2) is formed in the sample inlet pipe body (1), a sample inlet pipe (4) is arranged in the upper side of the sample inlet groove (2), a connecting nut (13) is fixedly installed on the bottom wall of the lower end of the sample inlet pipe body (1), a sample inlet hole (14) is formed in the lower end of the sample inlet groove (2) in a communicating mode, and the sample inlet pipe body (1) is connected with the gas chromatograph through the connecting nut (13);

and two flow rate adjusting mechanisms (12) are arranged and symmetrically hinged in the lower position in the sample feeding groove (2) respectively, and the sample feeding speed is conveniently controlled by arranging the flow rate adjusting mechanisms (12).

2. The sample inlet structure of a gas chromatograph of claim 1, wherein: the inside fixed mosaic of upside that introduction port body (1) is located injection groove (2) has seal ring (3), and the central point of seal ring (3) puts and is provided with the perforation, the syringe needle of introduction pipe (4) passes the perforation and extends to the downside of seal ring (3).

3. The sample inlet structure of a gas chromatograph of claim 1, wherein: the sample injection groove (2) is positioned under the sample injection pipe (4) and is internally provided with two filter plates (5), and the filter holes of the filter plates (5) positioned on the upper side are larger than the filter holes of the filter plates (5) positioned on the lower side.

4. The sample inlet structure of a gas chromatograph according to claim 3, wherein: the utility model discloses a filter, including filter (5), installation piece (8), magnet (10), sample inlet body (1), limiting groove (7), stopper (6) and elastic washer, the one side lateral wall intermediate position fixedly connected with stopper (6) of one side lateral wall of filter (5), and the rigid coupling has installation piece (8) on its one side lateral wall of keeping away from stopper (6), the installation piece (8) are close to on the one side lateral wall of filter (5) scarf joint have magnet (10), sample inlet body (1) is close to one side lateral wall of installation piece (8) and sets up with installation piece (8) matched with T type recess, and T type recess communicates with each other with sample inlet groove (2), the inside scarf joint of one side cell wall of T type recess has magnet two (9), sample inlet body (1) is close to be provided with on one side lateral wall of stopper (6) with stopper (6) matched with spacing groove (7), and is provided with elastic washer in spacing groove (7).

5. The sample inlet structure of a gas chromatograph according to claim 4, wherein: a sealing gasket (11) is arranged between the T-shaped groove and the mounting block (8), so that gas is prevented from overflowing from a connecting gap between the T-shaped groove and the mounting block (8), and meanwhile, air is prevented from directly overflowing from the connecting gap.

6. The sample inlet structure of a gas chromatograph of claim 1, wherein: flow rate adjustment mechanism (12) comprise hinged seat (15) and baffle (16) of installing on advance kind groove (2) both sides cell wall, two one side of hinged seat (15) is rotated and is connected with baffle (16), baffle (16) are kept away from under one side of hinged seat (15) inside spout (17) that is provided with of lateral wall, and spout (17) sliding connection have slider (18), one side of slider (18) is rotated and is connected with screw lead screw (20), screw lead screw (20) level runs through the setting in one side lateral wall of introduction port body (1), and its one end of keeping away from slider (18) extends to outside the lateral wall of introduction port body (1) to the rigid coupling has handle (21), the inside scarf joint of lateral wall of introduction port body (1) has adjusting nut (22), screw lead screw (20) threaded connection be in adjusting nut (22).

7. The sample inlet structure of a gas chromatograph of claim 1, wherein: and a second sealing washer (19) is embedded in the side wall of one side of the sample injection groove (2) close to the threaded screw rod (20).