CN220323212U

CN220323212U - Gas flow mechanism of gas chromatograph

Info

Publication number: CN220323212U
Application number: CN202321937903.3U
Authority: CN
Inventors: 王式敏; 刘强; 王开法; 吕长水
Original assignee: Tengzhou Allen Analytical Instrument Co ltd
Current assignee: Tengzhou Allen Analytical Instrument Co ltd
Priority date: 2023-07-23
Filing date: 2023-07-23
Publication date: 2024-01-09
Anticipated expiration: 2033-07-23

Abstract

The utility model relates to the technical field of gas chromatographs, in particular to a gas flow mechanism of a gas chromatograph, which avoids the influence of water or dust particles doped in sample gas on a detection result and improves the detection precision; the device comprises a gas chromatograph, a base and four supporting legs, wherein the gas chromatograph is fixedly arranged at the right part of the top end of the base, and the supporting legs are respectively and fixedly arranged at four corners of the bottom end of the base to support equipment; still include gas tank, connecting tube, four branches, the subassembly that admits air, hold-down assembly, dehumidification subassembly and filtration subassembly, the bottom of gas tank is through four branch fixed mounting in the top left portion of base, and the inside of gas tank is provided with the circulation chamber, and the bottom fixedly connected with connecting tube of gas tank, connecting tube's output is connected with gas chromatograph, and the top at the gas tank is installed to the subassembly that admits air, and hold-down mechanism installs in the upper end of admitting air the subassembly, and dehumidification subassembly is installed in the inside of gas tank circulation chamber.

Description

Gas flow mechanism of gas chromatograph

Technical Field

The utility model relates to the technical field of gas chromatographs, in particular to a gas flow mechanism of a gas chromatograph.

Background

Gas chromatographs are instruments that utilize chromatographic separation techniques and detection techniques to perform qualitative and quantitative analysis of complex mixtures of multiple components. Currently, gas chromatographs exist in the market, in which a sample gas is transported into a gas circulation device inside the gas chromatograph by injection when a gas sample is detected by the gas chromatograph. Through retrieving, a gas chromatograph sample gas circulation device that prior art publication number CN214895078U proposed, the gas chromatograph main part is provided with the sample gas cylinder that can reciprocate in the gas chromatograph main part, connects through the communication unit between gas chromatograph main part and the sample gas cylinder, and the sample gas cylinder is by elevating unit drive reciprocates. The utility model has simple structure and convenient use, and solves the problems that the prior gas circulation equipment has too complex structure and is very inconvenient to use. However, if the sample gas is doped with moisture or dust particles, the later detection operation is affected, and the accuracy of the detection result is affected.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a gas flow mechanism of a gas chromatograph, which can prevent the water or dust particles doped in the sample gas from affecting the detection result and improve the detection precision.

The utility model relates to a gas flow mechanism of a gas chromatograph, which comprises the gas chromatograph, a base and four supporting legs, wherein the gas chromatograph is fixedly arranged at the right part of the top end of the base, and the supporting legs are respectively and fixedly arranged at four corners of the bottom end of the base to support equipment; the device comprises a base, and is characterized by further comprising a gas box, a connecting conduit, four supporting rods, an air inlet assembly, a compression assembly, a dehumidifying assembly and a filtering assembly, wherein the bottom end of the gas box is fixedly arranged at the left part of the top end of the base through the four supporting rods; the sample gas cylinder is connected with the air inlet assembly and is input into the circulation cavity of the gas box, the sample gas cylinder is fixedly compressed through the compression assembly, the tightness is improved, air is prevented from entering, the gas is heated and dried through the dehumidification assembly, the gas is filtered by the filtering assembly, the detection result is prevented from being influenced by moisture and impurities in the gas, and the detection precision is improved.

Preferably, the air inlet assembly comprises a plurality of brackets, a plurality of air inlet pipes, a plurality of mounting plates, a plurality of sealing rings and a plurality of valves, wherein the brackets are uniformly arranged and mounted at the top end of the air box, the output ends of the air inlet pipes penetrate through the brackets and are communicated with the circulation cavity of the air box, the valves are mounted on the air inlet pipes, the mounting plates are fixedly mounted on the side walls of the brackets, the sealing rings are fixedly mounted at the top ends of the mounting plates, and the top input ends of the air inlet pipes penetrate through the mounting plates and the sealing rings and are positioned in the sealing rings; when the air inlet device is used, the sample air bottle is placed above the mounting plate, the air inlet pipe is led to enter the sample air bottle, the tightness between the sample air bottle and the mounting plate is increased through the sealing ring, air is prevented from entering, the valve is opened, air enters the circulation cavity of the air box through the air inlet pipe, and the air inlet device can conveniently guide and circulate various gases through the air inlet pipes.

Preferably, the pressing assembly comprises a plurality of top plates, a plurality of electric telescopic rods, a plurality of pressing plates and a plurality of rubber pads, wherein the top plates are fixedly arranged at the top ends of the supports, the electric telescopic rods are fixedly arranged on the top plates, the pressing plates are fixedly arranged at the bottom ends of the electric telescopic rods, and the rubber pads are connected at the bottom ends of the pressing plates; after inserting the sealing washer with the sample gas cylinder, start electric telescopic handle, electric telescopic handle drives the bottle end of clamp plate depressurization tight sample gas cylinder, fixes the sample gas cylinder, guarantees the leakproofness of sample gas cylinder bottleneck, can be applicable to the not high sample gas cylinder of co-altitude, can avoid the clamp plate to lead to the fact the damage to the bottle end of sample gas cylinder through the rubber pad.

Preferably, the dehumidifying component comprises a plurality of heating rods and a drying box, wherein the heating rods are respectively and fixedly arranged at the left end and the right end of the circulation cavity of the gas box, the drying box is fixedly arranged on the side wall of the rear end of the circulation cavity, and the drying box is internally provided with a drying material; after the gas is input into the circulation cavity, moisture in the gas is absorbed through a drying material in the drying box, and meanwhile, the heating rod is started to heat and dry the gas, so that the moisture in the gas is reduced, and the influence of the moisture in the gas on a detection result is avoided.

Preferably, the filter assembly comprises a filter screen, two guide blocks, two slide bars, two springs and a vibration assembly, the filter screen is arranged in a circulation cavity of the gas box, the guide blocks are fixedly connected to the left end and the right end of the filter screen, sliding grooves are symmetrically formed in the inner walls of the left end and the right end of the circulation cavity of the gas box, the two slide bars are respectively fixedly arranged in the sliding grooves, the two guide blocks are respectively and slidably arranged on the outer walls of the slide bars, the two springs are respectively sleeved on the outer surfaces of the slide bars, the top ends of the springs are connected with the top ends of the sliding grooves, and the bottom ends of the springs are connected with the top ends of the guide blocks; the dry gas is filtered through the filter screen to remove dust particles, and simultaneously the vibration component drives the filter screen to move upwards, and the filter screen drives the guide block to slide on the slide bar to compress the spring, the spring returns to the original state and pushes the guide block downwards, so that the filter screen vibrates up and down, the blockage is avoided, and meanwhile, the guide block and the slide bar are matched to enable the filter screen to be kept in a horizontal state.

Preferably, the vibration component comprises a small motor, a rotating rod and two rotating cams, wherein the small motor is fixedly arranged on the left side wall of the gas box, the output end of the small motor penetrates through the side wall of the gas box and is fixedly connected with the rotating rod, the rotating rod is rotatably arranged in a circulation cavity of the gas box, and the two rotating cams are symmetrically arranged on the outer wall of the rotating rod; the small-sized motor is started to drive the rotating rod to rotate, and the rotating rod drives the rotating cam to rotate to hit the filter screen, so that the filter screen vibrates up and down, the blockage is avoided, the structure is simple, and the practicability is high.

Preferably, the gas box further comprises an access door, wherein the access door cover is arranged at the front end of the gas box, a handle is arranged on the access door, and a sealing gasket is arranged at the contact part of the access door and the front end of the gas box; the filter screen is convenient to detach and clean through the access door, the use effect of the filter screen is effectively improved, and the inside of the gas tank is convenient to maintain and overhaul.

Compared with the prior art, the utility model has the beneficial effects that: the sample gas cylinder is connected with the air inlet assembly and is input into the circulation cavity of the gas box, the sample gas cylinder is fixedly compressed through the compression assembly, the tightness is improved, air is prevented from entering, the gas is heated and dried through the dehumidification assembly, the gas is filtered by the filtering assembly, the detection result is prevented from being influenced by moisture and impurities in the gas, and the detection precision is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

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

FIG. 3 is a schematic left-hand view of the present utility model;

FIG. 4 is a schematic view of a front cross-sectional structure of the present utility model;

FIG. 5 is a schematic view of a left-hand cross-sectional structure of the present utility model;

the reference numerals in the drawings: 1. a gas chromatograph; 2. a base; 3. a support leg; 4. a gas box; 5. a connecting conduit; 6. a support rod; 7. a sample gas cylinder; 8. a bracket; 9. an air inlet pipe; 10. a mounting plate; 11. a seal ring; 12. a valve; 13. a top plate; 14. an electric telescopic rod; 15. a pressing plate; 16. a rubber pad; 17. a heating rod; 18. a drying box; 19. a filter screen; 20. a guide block; 21. a slide bar; 22. a spring; 23. a small motor; 24. a rotating rod; 25. rotating the cam; 26. an access door.

Description of the embodiments

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. This utility model may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As shown in fig. 1, fig. 3, fig. 4 and fig. 5, the gas chromatograph 1 is fixedly installed at the right part of the top end of the base 2, the four corners of the bottom end of the base 2 are fixedly installed with the supporting legs 3 respectively, the equipment is supported, the bottom end of the gas box 4 is fixedly installed at the left part of the top end of the base 2 through four supporting rods 6, a circulation cavity is arranged in the gas box 4, the bottom of the gas box 4 is fixedly connected with the connecting conduit 5, the output end of the connecting conduit 5 is connected with the gas chromatograph 1, a plurality of brackets 8 are uniformly arranged and installed at the top end of the gas box 4, the output ends of a plurality of air inlet pipes 9 are communicated with the circulation cavity of the gas box 4 through the brackets 8, a valve 12 is installed on the air inlet pipe 9, a mounting plate 10 is fixedly installed on the side wall of the brackets 8, a sealing ring 11 is fixedly installed at the top end of the mounting plate 10, the top input end of the air inlet pipe 9 is penetrated through the mounting plate 10 and the sealing ring 11 and is positioned in the inside the sealing ring 11, a plurality of top plates 13 are fixedly installed at the top ends of the brackets 8, an electric telescopic rod 14 is fixedly installed on the top plates 13, the bottom ends of the electric telescopic rod 14 are fixedly installed on the top plates 15, the bottom ends of the electric telescopic rod 16 are fixedly installed on the pressing plates 16, the bottom of the heating pads 17 are respectively, and the left side walls of the drying boxes are fixedly installed on the drying boxes 18, and the drying boxes are fixedly installed on the left side walls 18;

when the air inlet device is used, the sample air cylinder 7 is placed above the mounting plate 10, the air inlet pipe 9 is led to enter the sample air cylinder 7, tightness between the sample air cylinder 7 and the mounting plate 10 is improved through the sealing ring 11, air is prevented from entering, the valve 12 is opened, air enters the circulation cavity of the air box 4 through the air inlet pipe 9, guiding circulation of various gases can be conveniently conducted through the plurality of air inlet pipes 9, after the sample air cylinder 7 is inserted into the sealing ring 11, the electric telescopic rod 14 is started, the electric telescopic rod 14 drives the pressing plate 15 to press down the bottom of the sample air cylinder 7, the sample air cylinder 7 is fixed, tightness of the bottle mouth of the sample air cylinder 7 is guaranteed, the air inlet device can be suitable for the sample air cylinders 7 with different heights, damage to the bottom of the sample air cylinder 7 can be avoided through the rubber gasket 16, after the air is input into the circulation cavity, moisture in the air is absorbed through the drying material in the drying box 18, meanwhile, the heating rod 17 is started to heat and dry the air, the moisture in the air is reduced, and the detection result is prevented from being influenced by the moisture in the air.

As shown in fig. 2, 4 and 5, the filter screen 19 is installed in the circulation cavity of the gas tank 4, the left end and the right end of the filter screen 19 are fixedly connected with guide blocks 20, sliding grooves are symmetrically formed in the inner walls of the left end and the right end of the circulation cavity of the gas tank 4, two sliding rods 21 are respectively fixedly installed in the sliding grooves, the two guide blocks 20 are respectively slidably installed on the outer walls of the sliding rods 21, two springs 22 are respectively sleeved on the outer surfaces of the sliding rods 21, the top ends of the springs 22 are connected with the top ends of the sliding grooves, the bottom ends of the springs 22 are connected with the top ends of the guide blocks 20, a small motor 23 is fixedly installed on the left side wall of the gas tank 4, the output end of the small motor 23 penetrates through the side wall of the gas tank 4 and is fixedly connected with a rotating rod 24, the rotating rod 24 is rotatably installed in the circulation cavity of the gas tank 4, two rotating cams 25 are symmetrically installed on the outer walls of the rotating rod 24, an access door 26 is covered on the front end of the gas tank 4, a handle is arranged on the access door 26, and a sealing pad is arranged at a place where the access door 26 contacts the front end of the gas tank 4;

the dry gas is filtered through the filter screen 19, dust particles are removed, the small motor 23 is started, the rotating rod 24 is driven to rotate, the rotating rod 24 drives the rotating cam 25 to rotate to strike the filter screen 19, the filter screen 19 drives the guide block 20 to slide on the sliding rod 21, the spring 22 is compressed, the spring 22 is restored to be original state and pushes the guide block 20 downwards, the filter screen 19 is enabled to vibrate up and down, blocking is avoided, meanwhile, the guide block 20 and the sliding rod 21 are matched to enable the filter screen 19 to be kept in a horizontal state, the filter screen 19 is conveniently detached and cleaned through the access door 26, the use effect of the filter screen 19 is effectively improved, and maintenance and overhaul are facilitated inside the gas tank 4.

As shown in fig. 1 to 5, in the gas flow mechanism of the gas chromatograph of the present utility model, when in operation, a sample gas cylinder 7 is placed above a mounting plate 10 and an air inlet pipe 9 enters the interior of the sample gas cylinder 7, then an electric telescopic rod 14 is started, the electric telescopic rod 14 drives a pressing plate 15 to lower and tightly press the bottom of the sample gas cylinder 7, the sample gas cylinder 7 is fixed, tightness of the bottle mouth of the sample gas cylinder 7 is ensured, a valve 12 is opened to enable gas to enter a circulation cavity of a gas box 4 through the air inlet pipe 9, after the gas is input into the circulation cavity, moisture in the gas is absorbed through a drying material in a drying box 18, a heating rod 17 is started to heat and dry the gas, the moisture in the gas is reduced, then the dried gas is filtered through a filter screen 19, a small motor 23 is started to drive a rotating rod 24 to rotate, the rotating cam 25 is driven to strike the filter screen 19, the filter screen 19 is vibrated up and down to avoid blocking, dust particles are removed, and the filtered gas enters the gas chromatograph 1 through a connecting conduit 5 to detect.

The heating rod 17, the drying oven 18 and the small motor 23 of the gas flow mechanism of the gas chromatograph of the present utility model are purchased on the market, and the person skilled in the art only needs to install and operate according to the instructions attached to the present utility model, without the need for creative efforts of the person skilled in the art.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. The gas flow mechanism of the gas chromatograph comprises the gas chromatograph (1), a base (2) and four supporting legs (3), wherein the gas chromatograph (1) is fixedly arranged at the right part of the top end of the base (2), and the supporting legs (3) are respectively and fixedly arranged at four corners of the bottom end of the base (2) to support equipment; the novel dehumidifying device is characterized by further comprising a gas box (4), connecting guide pipes (5), four supporting rods (6), an air inlet component, a compressing component, a dehumidifying component and a filtering component, wherein the bottom end of the gas box (4) is fixedly arranged at the left part of the top end of the base (2) through the four supporting rods (6), a circulation cavity is formed in the gas box (4), the connecting guide pipes (5) are fixedly connected to the bottom of the gas box (4), the output end of the connecting guide pipes (5) is connected with the gas chromatograph (1), the air inlet component is arranged at the top end of the gas box (4), the compressing component is arranged at the upper end of the air inlet component, the dehumidifying component is arranged in the circulation cavity of the gas box (4), and the filtering component is arranged in the circulation cavity of the gas box (4) below the dehumidifying component.

2. The gas flow mechanism of a gas chromatograph according to claim 1, wherein the gas inlet assembly comprises a plurality of brackets (8), a plurality of gas inlet pipes (9), a plurality of mounting plates (10), a plurality of sealing rings (11) and a plurality of valves (12), the plurality of brackets (8) are uniformly arranged and installed at the top end of the gas tank (4), the output ends of the plurality of gas inlet pipes (9) penetrate through the brackets (8) and are communicated with the circulation cavity of the gas tank (4), the valves (12) are installed on the gas inlet pipes (9), the mounting plates (10) are fixedly installed on the side walls of the brackets (8), the sealing rings (11) are fixedly installed at the top ends of the mounting plates (10), and the top input ends of the gas inlet pipes (9) penetrate through the mounting plates (10) and the sealing rings (11) and are located inside the sealing rings (11).

3. The gas flow mechanism of a gas chromatograph according to claim 2, wherein the compression assembly comprises a plurality of top plates (13), a plurality of electric telescopic rods (14), a plurality of pressing plates (15) and a plurality of rubber pads (16), the plurality of top plates (13) are fixedly arranged at the top ends of the brackets (8), the electric telescopic rods (14) are fixedly arranged on the top plates (13), the pressing plates (15) are fixedly arranged at the bottom ends of the electric telescopic rods (14), and the rubber pads (16) are connected at the bottom ends of the pressing plates (15).

4. A gas flow mechanism of a gas chromatograph according to claim 1, characterized in that the dehumidifying unit comprises a plurality of heating rods (17) and a drying oven (18), the plurality of heating rods (17) are respectively fixedly installed at the left and right ends of the flow chamber of the gas oven (4), the drying oven (18) is fixedly installed on the rear end side wall of the flow chamber, and the drying material is disposed and dried inside the drying oven (18).

5. The gas flow mechanism of a gas chromatograph according to claim 1, wherein the filtering component comprises a filter screen (19), two guide blocks (20), two slide bars (21), two springs (22) and a vibration component, the filter screen (19) is installed in a circulation cavity of the gas box (4), the guide blocks (20) are fixedly connected to the left end and the right end of the filter screen (19), sliding grooves are symmetrically formed in the inner walls of the left end and the right end of the circulation cavity of the gas box (4), the two slide bars (21) are respectively and fixedly installed in the sliding grooves, the two guide blocks (20) are respectively and slidably installed on the outer walls of the slide bars (21), the two springs (22) are respectively sleeved on the outer surfaces of the slide bars (21), the top ends of the springs (22) are connected with the top ends of the sliding grooves, and the bottom ends of the springs (22) are connected with the top ends of the guide blocks (20).

6. The gas flow mechanism of claim 5, wherein the vibration assembly comprises a small motor (23), a rotating rod (24) and two rotating cams (25), the small motor (23) is fixedly arranged on the left side wall of the gas tank (4), the output end of the small motor (23) penetrates through the side wall of the gas tank (4) and is fixedly connected with the rotating rod (24), the rotating rod (24) is rotatably arranged in the circulation cavity of the gas tank (4), and the two rotating cams (25) are symmetrically arranged on the outer wall of the rotating rod (24).

7. A gas flow mechanism for a gas chromatograph according to claim 1, further comprising an access door (26), wherein the access door (26) is covered on the front end of the gas tank (4), a handle is provided on the access door (26), and a gasket is provided at a place where the access door (26) contacts the front end of the gas tank (4).