CN214174261U

CN214174261U - Feeding device for gas chromatography

Info

Publication number: CN214174261U
Application number: CN202023330981.6U
Authority: CN
Inventors: 王婷婷; 高金川
Original assignee: Hebei Tianhua Shengquan Chemical Co ltd
Current assignee: Hebei Shengquan New Materials Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-10
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a feed arrangement for gas chromatography belongs to detection device's field, and feed arrangement sets up on the gas chromatograph body, and the gas chromatograph body includes the inlet, and in microsyringe inserted the inlet, feed arrangement was including pressing from both sides tight the clamping piece of microsyringe, be provided with the gliding drive arrangement of drive clamping piece along vertical direction on the other gas chromatograph body of inlet, the feeding needle of microsyringe is located directly over the inlet. This application has the effect that improves and advance kind stability, improves the accuracy that detects.

Description

Feeding device for gas chromatography

Technical Field

The application relates to the field of detection devices, in particular to a feeding device for gas chromatography.

Background

Gas chromatography is the detection and analysis of gaseous substances or substances that can be converted to gases at a certain temperature. With the rapid development of the petrochemical industry, the usage amount of crude oil in the production of the chemical industry is continuously increased, and as the crude oil contains various harmful components, the problems of corrosion, scaling and bacterial and algae breeding can be caused in the processes of crude oil exploitation, transportation, refining and subsequent use, and various oilfield chemicals such as corrosion inhibitors, scale inhibitors, bactericides and the like are required to be added to ensure the product quality and the corresponding use effect. In the process of producing oilfield chemical reagents, a gas chromatograph body is often used to analyze oilfield chemical reagents.

Referring to fig. 1, gas chromatograph body top surface is provided with introduction port 1, and the practical microsyringe 6 of staff carries out manual sample introduction, and the syringe 64 of current microsyringe 6 is generally all longer, when using, needs the experimenter range estimation to insert introduction needle 64 into introduction port 1, pricks introduction needle 64 into introduction port 1 back, and it is internal to add the gas chromatograph with the sample in the microsyringe 6 through introduction port 1 fast.

In view of the above-mentioned related technologies, the inventor believes that the sample needle 64 of the micro-injector 6 is long, which causes the sample needle 64 to be difficult to vertically insert into the sample inlet 1, and the sample is unstable during sample injection, and the time for instantly vaporizing the sample is inconsistent, thereby affecting the accuracy of the experiment.

SUMMERY OF THE UTILITY MODEL

In order to improve and advance a kind stability, improve the accuracy that detects, this application provides a feed arrangement for gas chromatography.

The application provides a feed arrangement for gas chromatography adopts following technical scheme:

the utility model provides a feed arrangement for gas chromatography, feed arrangement sets up on the gas chromatograph body, and the gas chromatograph body includes the inlet, and the microsample injector inserts in the inlet, and feed arrangement is including pressing from both sides tightly the clamping piece of microsample injector, be provided with the gliding drive arrangement of drive clamping piece along vertical direction on the other gas chromatograph body of inlet, the feed needle of microsample injector is located directly over the inlet.

Through adopting above-mentioned technical scheme, the microsyringe is pressed from both sides tightly on the clamping piece, and actuating mechanism drive microsyringe is automatic to be close to the inlet port, makes the feed needle erect and inserts in the inlet port, and the feed needle is steady smooth and easy at the in-process that inserts the inlet port, and the microsyringe is pressed from both sides tightly, and is more stable when crowded sample into the inlet port consequently, and the speed of sample instantaneous gasification is unanimous, improves the accuracy that detects.

Optionally, the driving device includes a motor, a vertical screw is fixed to an output end of the motor, a sliding block slides on the screw, a connecting rod is fixed to the sliding block, and the clamping member is fixed to the connecting rod.

Through adopting above-mentioned technical scheme, the motor rotates the back, and the slider slides along the lead screw, makes the clamping rod can stably slide in vertical direction. The movement of the micro sample injector is automatically controlled, and the operation is convenient.

Optionally, the driving device includes a hollow casing, the motor, the lead screw, the slider and the like are all located inside the casing, a vertical chute is formed in the casing, and the connecting rod extends out of the chute.

Through adopting above-mentioned technical scheme, the casing is protected parts such as motor, lead screw and slider, reduces the injury to the people when lead screw and slider slide to the connecting rod can slide along the spout.

Optionally, a clamping ring is fixed on the gas chromatograph body on one side of the sample inlet, a fixing groove is formed in the clamping ring, an elastic clamping block is fixed at the bottom of the shell, and the clamping block is connected with the fixing groove in an inserting mode.

Through adopting above-mentioned technical scheme, be convenient for install actuating mechanism at the upper surface of gas chromatograph body, the installation and the dismantlement of the feed arrangement of being convenient for.

Optionally, a vertical limiting strip is arranged in the clamping ring, a vertical limiting groove is formed in the side wall of the clamping block, and the limiting strip is inserted into the limiting groove.

Through adopting above-mentioned technical scheme, insert the snap ring back in according to fixed direction when the fixture block, the clamp ring position of connecting on drive arrangement is certain, consequently presss from both sides the microsyringe of pressing from both sides tight on the clamp ring and lies in directly over the introduction port, fixes a position more accurately.

Optionally, the clamping member includes a first clamping plate and a second clamping plate clamped in opposite directions, the first clamping plate and the second clamping plate are elastically connected, the first clamping plate and the second clamping plate are respectively provided with a abutting groove, and the microsyringe is clamped between the two abutting grooves.

Through adopting above-mentioned technical scheme, when installing the microsyringe between first splint and second splint, with second splint and first splint pull apart mutually can, make to support the groove with the microsyringe chucking, convenient to use.

Optionally, the microsyringe comprises a barrel and a connecting plate connected to the end of the barrel, wherein the connecting plate abuts against the upper surfaces of the first clamping plate and the second clamping plate.

By adopting the technical scheme, the micro sample injector is convenient to stabilize better, and the possibility that the micro sample injector slides out from the abutting groove is reduced.

Optionally, the first clamping plate is provided with an inward concave groove, the second clamping plate is provided with a convex sleeve, the sleeve is inserted into the groove, the sleeve is slidably connected with the groove, a spring is arranged in the groove, one end of the spring is fixed on the inner end face of the groove, and the other end of the spring is inserted into the sleeve and fixed on the inner wall of the sleeve.

Through adopting above-mentioned technical scheme, the elasticity of spring tractive second splint support tightly on first splint to at the gliding in-process of first splint relatively, the sleeve makes the second splint more stable when sliding in the recess, and stabilizes centre gripping microsyringe, and reduces the possibility that the spring exposes from the recess, makes the second splint more smooth and easy when the return.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the microsyringe is clamped on the clamping piece, the driving mechanism drives the microsyringe to automatically approach the sample inlet, so that the feeding needle is vertically inserted into the sample inlet, the feeding needle is stable and smooth in the process of being inserted into the sample inlet, and the microsyringe is clamped, so that the sample is more stable when being extruded into the sample inlet, the instantaneous gasification speed of the sample is consistent, and the detection accuracy is improved;

2. when installing the microsyringe between first splint and second splint, with second splint and first splint pull apart mutually can, make to support tight groove with microsyringe chucking, convenient to use.

Drawings

FIG. 1 is a schematic structural diagram of a related art of the present application;

FIG. 2 is a schematic diagram of the overall structure of the present application;

FIG. 3 is a schematic view of an exploded structure of the present application in which the driving device is connected to the snap ring;

FIG. 4 is a schematic cross-sectional view of the present application;

fig. 5 is a schematic view of the structure of the clamping member of the present application.

Description of reference numerals: 1. a sample inlet; 2. a clamping member; 21. a first splint; 22. a second splint; 23. abutting against the groove; 24. a groove; 25. a sleeve; 26. a spring; 3. a drive device; 31. a housing; 311. a chute; 32. a motor; 33. a lead screw; 34. a slider; 35. a connecting rod; 4. a clamping block; 41. a limiting groove; 5. a snap ring; 51. a limiting strip; 52. fixing grooves; 6. a microsyringe; 61. a barrel body; 62. a piston rod; 63. a connecting plate; 64. a feeding needle.

Detailed Description

The present application is described in further detail below with reference to figures 2-5.

The embodiment of the application discloses feed arrangement for gas chromatography. Referring to fig. 2, the gas chromatograph body includes an injection port 1, and the injection port 1 is disposed on a top surface of the gas chromatograph body. The feeding device is arranged at one side of the sample inlet 1, the microsyringe 6 can be fixed on the feeding device, and the feeding device inserts the sample injection needle 64 of the microsyringe 6 into the sample inlet 1.

Referring to fig. 3 and 4, the feeding device includes a clamp 2 and a driving device 3 for driving the clamp 2 to move up and down, and the driving device 3 is fixed to an upper surface of the gas chromatograph body. The driving device 3 comprises a shell 31, the shell 31 is hollow, a motor 32 is fixed at the bottom in the shell 31, a lead screw 33 is fixed at the output end of the motor 32, and a sliding block 34 is connected to the lead screw 33. A horizontal connecting rod 35 is fixed on the sliding block 34, the clamping element 2 is fixed on the connecting rod 35, a strip-shaped sliding groove 311 is formed in one side of the shell 31, the sliding groove 311 is communicated with the inside of the shell 31, the extending direction of the sliding groove 311 is the same as the axial direction of the lead screw 33, and the connecting rod 35 extends out of the sliding groove 311.

When the motor 32 drives the lead screw 33 to rotate, the slider 34 slides up and down along the lead screw 33, and the connecting rod 35 slides along the slide slot 311.

The bottom of the shell 31 is fixed with a fixture block 4, the fixture block 4 is made of deformable rubber, a clamp ring 5 is fixed on the top surface of the gas chromatograph body, an inward concave fixing groove 52 is formed in the clamp ring 5, and the fixture block 4 can be squeezed into the fixing groove 52 and is tightly clamped. There is convex spacing 51 on the 5 inner walls of snap ring, and there is inside sunken spacing groove 41 on the fixture block 4 lateral wall, when spacing 51 card goes into spacing groove 41, drive arrangement 3 stabilizes the setting on the gas chromatograph body promptly to make clamp 6 on clamping piece 2 be located the inlet 1 directly over.

Referring to fig. 3 and 5, the clamping member 2 includes a first clamping plate 21 and a second clamping plate 22 clamped in opposite directions, the first clamping plate 21 and the second clamping plate 22 are both provided with semicircular abutting grooves 23, the barrel 61 of the microsyringe 6 is cylindrical, the barrel 61 is slidably connected with a piston rod 62, and the end of the barrel 61 is provided with a connecting plate 63. The microsyrinths 6 are placed in the first clamping plate 21 and the second clamping plate 22, the barrel 61 of the microsyrinths 6 abuts against the side wall of the groove 23, and the connecting plate 63 is lapped on the upper surfaces of the first clamping plate 21 and the second clamping plate 22.

The end surface of the first clamping plate 21 facing the second clamping plate 22 is provided with two concave grooves 24, and the two concave grooves 24 are respectively arranged on two sides of the clamping groove 41. The end face of the second clamping plate 22 facing the first clamping plate 21 is provided with two protruding sleeves 25, the two sleeves 25 are respectively arranged on two sides of the clamping groove 41, the sleeves 25 are cylindrical, the sleeves 25 are inserted into the grooves 24, and the sleeves 25 are connected with the grooves 24 in a sliding mode. A spring 26 is fixed on the inner end surface of the groove 24, and the spring 26 extends into the sleeve 25 and is fixed in the sleeve 25.

The first clamping plate 21 is fixed on the connecting rod 35, when the second clamping plate 22 is pulled in the direction away from the first clamping plate 21, the spring 26 is stretched, the spring 26 is always in the sleeve 25, the two clamping grooves 41 are away from each other, and the microsyrinths 6 can be placed between the first clamping plate 21 and the second clamping plate 22; when the second clamping plate 22 is released, the spring 26 urges the second clamping plate 22 closer to the second clamping plate 22, and the micro injector 6 is clamped between the first clamping plate 21 and the second clamping plate 22.

Referring to fig. 4, the feed pin 64 faces the sample inlet 1 when the microsyringe 6 is clamped to the clamping member 2. During motor 32 drive lead screw 33 rotated, slider 34 was certain along the gliding length of lead screw 33, when slider 34 slided to the bottom by the lead screw 33 top, sample injection needle 64 inserted gradually into introduction port 1, then the staff adds reagent into the gas chromatograph originally internally, and reagent is added steadily, improves the measuring accuracy.

The implementation principle of the feeding device for gas chromatography in the embodiment of the application is as follows: when a sample is added into the gas chromatograph body, the stopper groove 41 is aligned with the stopper bar 51, and the fixture 4 is pushed into the retainer ring 5.

After the micro-sampler 6 is filled with the sample, the second clamping plate 22 is pulled away from the first clamping plate 21 under the sampling needle 64, the barrel 61 of the micro-sampler 6 is placed between the first clamping plate 21 and the second clamping plate 22, and then the connecting plate 63 of the second clamping plate 22 is loosened. The connection plate 63 is attached to the upper surfaces of the first clamping plate 21 and the second clamping plate 22.

Then the motor 32 is driven to rotate, the motor 32 drives the lead screw 33 to rotate, the driving slide block 34 slides along the lead screw 33, and the connecting rod 35 drives the microsyringe 6 to slide towards the direction close to the sample inlet 1, so that the sample injection needle 64 is inserted into the sample inlet 1. The worker then squeezes the sample into inlet 1. After the feeding is completed, the motor 32 rotates reversely to drive the slide block 34 to drive the connecting rod 35 to slide upwards, and the sample injection needle 64 slides out of the sample injection port 1.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a feed arrangement for gas chromatography, feed arrangement sets up on the gas chromatograph body, and the gas chromatograph body includes introduction port (1), and in microsyringe (6) inserted introduction port (1), its characterized in that: the feeding device comprises a clamping piece (2) for clamping the microsyringe (6), a driving device (3) for driving the clamping piece (2) to slide along the vertical direction is arranged on the gas chromatograph body beside the sample inlet (1), and a feeding needle (64) of the microsyringe (6) is positioned right above the sample inlet (1).

2. The feeding device for gas chromatography according to claim 1, characterized in that: the driving device (3) comprises a motor (32), a vertical lead screw (33) is fixed at the output end of the motor (32), a sliding block (34) slides on the lead screw (33), a connecting rod (35) is fixed on the sliding block (34), and the clamping piece (2) is fixed on the connecting rod (35).

3. The feeding device for gas chromatography according to claim 2, characterized in that: the driving device (3) comprises a hollow shell (31), a motor (32), a lead screw (33), a sliding block (34) and the like are all located inside the shell (31), a vertical sliding groove (311) is formed in the shell (31), and a connecting rod (35) extends out of the sliding groove (311).

4. The feeding device for gas chromatography according to claim 1, characterized in that: a clamping ring (5) is fixed on the gas chromatograph body on one side of the sample inlet (1), a fixing groove (52) is formed in the clamping ring (5), an elastic clamping block (4) is fixed at the bottom of the shell (31), and the clamping block (4) is connected with the fixing groove (52) in an inserting mode.

5. The feeding device for gas chromatography according to claim 4, characterized in that: a vertical limiting strip (51) is arranged in the clamping ring (5), a vertical limiting groove (41) is formed in the side wall of the clamping block (4), and the limiting strip (51) is connected with the limiting groove (41) in an inserting mode.

6. The feeding device for gas chromatography according to claim 1, characterized in that: the clamping piece (2) comprises a first clamping plate (21) and a second clamping plate (22) which are clamped in opposite directions, the first clamping plate (21) is elastically connected with the second clamping plate (22), the first clamping plate (21) and the second clamping plate (22) are respectively provided with a abutting groove (23), and the microsyringe (6) is clamped between the two abutting grooves (23).

7. The feeding device for gas chromatography according to claim 6, characterized in that: the microsyringe (6) comprises a cylinder body (61) and a connecting plate (63) connected to the end part of the cylinder body (61), wherein the connecting plate (63) abuts against the upper surfaces of the first clamping plate (21) and the second clamping plate (22).

8. The feeding device for gas chromatography according to claim 6, characterized in that: the novel clamping device is characterized in that an inwards-concave groove (24) is formed in the first clamping plate (21), a convex sleeve (25) is arranged on the second clamping plate (22), the sleeve (25) is inserted into the groove (24), the sleeve (25) is connected with the groove (24) in a sliding mode, a spring (26) is arranged in the groove (24), one end of the spring (26) is fixed to the inner end face of the groove (24), and the other end of the spring is inserted into the sleeve (25) and fixed to the inner wall of the sleeve (25).