CN212904706U

CN212904706U - Intelligent gas chromatograph

Info

Publication number: CN212904706U
Application number: CN202021991256.0U
Authority: CN
Inventors: 宋利源; 王佳楠; 程果; 赵路浩
Original assignee: Henan Convergence Testing Research Institute Co Ltd
Current assignee: Henan Convergence Testing Research Institute Co Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-04-06
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses an intelligent gas chromatograph, including the carrier gas steel bottle, relief pressure valve, clarifier, flowmeter, vaporizer, chromatographic column, the detector that connect gradually, the vaporizer top is provided with the sample inlet pipe, and the upper end is provided with the silica gel pad in the sample inlet pipe, has seted up the introduction port on the silica gel pad, the sample inlet pipe lower extreme is connected with the stainless steel inside lining pipe that communicates with the introduction port, and the port department is provided with down the silica gel pad under the stainless steel inside lining pipe, and lower silica gel pad is connected with the capillary column that is linked together with the stainless steel inside lining pipe, and stainless steel inside lining pipe middle part is provided with the ceramic heating member that is connected with stainless steel inside lining pipe outer wall, and the inside tungsten thick liquid printing circuit that is provided with of ceramic heating member, is provided with the infrared temperature sensor that can; after the tungsten paste printing circuit is electrified, the temperature can be rapidly increased, the heating efficiency is high, the outer wall of the stainless steel lining pipe is directly contacted with the ceramic heating body, the heat transfer efficiency is high, and the heating time is shortened.

Description

Intelligent gas chromatograph

Technical Field

The utility model belongs to the technical field of gas chromatography detects, a intelligent gas chromatograph is related to.

Background

The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology. The conventional vaporization device of a gas chromatograph generally adopts an electric heating wire to heat a glass lining tube, heats the glass lining tube to a specified temperature, then adds a sample solution to vaporize, and then uses a chromatographic column, a detector and the like to analyze.

At present, chinese patent No. CN209673736U discloses a sample introduction type rapid gasification device for a gas chromatograph, which comprises a heating shell, wherein a first through hole is formed in the outer wall of the top of the heating shell, a second through hole is formed in the outer wall of the bottom of the heating shell, glass lining pipes are arranged on the inner wall of the first through hole and the inner wall of the second through hole, a heat preservation layer is bonded in the side wall of the heating shell, a temperature sensor is connected to the inner wall of one side of the heat preservation layer through a screw, and an electric heating wire is connected to the inner wall of the heat preservation layer through a staple bolt; the device heats the interior of the heating shell by electrifying the heating wire, heats the air in the glass lining tube by air heat conduction, and vaporizes the sample liquid when the sample liquid enters the glass lining tube; however, after the electric heating wire is used for a certain time, a rust layer is generated on the surface of the electric heating wire, the heating efficiency of the electric heating wire is reduced, the service life of the electric heating wire is short, air exists between the electric heating wire and the glass lining tube, the heat transfer efficiency is low, a certain time is required for heating the glass lining tube to the vaporization temperature, and the heating efficiency is low.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides an intelligent gas chromatograph, fine solution among the prior art heating wire life hang down and the problem that heating efficiency is low.

In order to realize the purpose, the utility model discloses a technical scheme as follows: an intelligent gas chromatograph comprises a carrier gas steel cylinder, a pressure reducing valve, a purifier, a flowmeter, a vaporizing chamber, a chromatographic column and a detector which are connected in sequence, wherein the vaporizing chamber, the chromatographic column and the detector are placed in a thermostatic chamber, the detector is connected with a soap film flowmeter and an amplifier, the amplifier is connected with a recorder, a sample inlet pipe is arranged at the top end of the vaporizing chamber, an upper silica gel pad is arranged at the upper end in the sample inlet pipe, a sample inlet is arranged on the upper silica gel pad, the lower end of the sample inlet pipe is connected with a stainless steel lining pipe communicated with the sample inlet, the upper end of the stainless steel lining pipe is communicated with the output end of the flowmeter, a lower silica gel pad is arranged at the lower end of the stainless steel lining pipe, a capillary column communicated with the inside of the stainless steel lining pipe is connected on the lower silica gel pad, the capillary column is connected with the chromatographic column, and a, the ceramic heating body is internally provided with a tungsten paste printing circuit, and the side wall of the vaporization chamber is provided with an infrared temperature measuring sensor which can irradiate the outer surface of the stainless steel lining pipe.

Furthermore, the infrared temperature measurement sensors are arranged in three numbers from top to bottom.

Furthermore, the upper end and the lower end of the stainless steel lining pipe are provided with clamping pieces which are connected with the inner wall of the vaporizing chamber and have different sizes.

Furthermore, the stainless steel lining pipe lower extreme intercommunication has the pressure relief pipe that extends to the thermostatic chamber outside, be provided with manometer and solenoid valve on the pressure relief pipe.

Furthermore, the middle part of the stainless steel lining pipe is spiral, the ceramic heating body is cylindrical, and the stainless steel lining pipe surrounds the outer wall of the ceramic heating body.

Furthermore, the middle part of the stainless steel lining pipe is in a reciprocating zigzag shape, the cross section of the stainless steel lining pipe is in a rectangular shape, the ceramic heating body is in a sheet shape, and the ceramic heating body is inserted into the zigzag gap of the stainless steel lining pipe.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses in, be provided with tungsten thick liquid printing circuit among the ceramic heating member in the vaporizer, tungsten thick liquid printing circuit circular telegram back can heat up rapidly, and heating efficiency is high to direct and the ceramic heating member contact of stainless steel inside lining pipe outer wall, heat transfer efficiency is high, has reduced heat time.

2. The utility model discloses in, infrared temperature sensor is provided with threely under to from last in the vaporizer inner wall, carries out the temperature measurement to the different positions in bushing pipe middle part in the stainless steel, guarantees the accuracy nature of temperature measurement.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of a vaporization chamber in accordance with embodiment 1;

FIG. 3 is a schematic view showing the internal structure of a vaporization chamber in accordance with example 2.

In the figure: the device comprises a carrier gas steel cylinder (1), a pressure reducing valve (2), a purifier (3), a flowmeter (4), a vaporization chamber (5), a chromatographic column (6), a detector (7), a thermostatic chamber (8), an amplifier (9), a recorder (10), a sampling tube (11), an upper silica gel pad (12), a stainless steel lining tube (13), a lower silica gel pad (14), a capillary column (15), a ceramic heating body (16), an infrared temperature measuring sensor (17), a clamping piece (18) and a pressure discharge tube (19).

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 1

As shown in fig. 1 and fig. 2, the intelligent gas chromatograph of the present invention comprises a carrier gas steel cylinder 1, a pressure reducing valve 2, a purifier 3, a flow meter 4, a vaporizing chamber 5, a chromatographic column 6, and a detector 7, which are connected in sequence, wherein the vaporizing chamber 5, the chromatographic column 6, and the detector 7 are placed in a thermostatic chamber 8, the lower end of the thermostatic chamber 8 is provided with a storage battery, an electric box electrically connected to the storage battery, a temperature sensor, a thermostatic controller, and an on-off controller, which are electrically connected to the thermostatic controller, the thermostatic controller and the on-off controller, which are the prior art that technicians in this field can directly obtain, and are not described herein again, the temperature sensor, the thermostatic controller, and the on-off controller work in combination to realize a thermostatic environment in the thermostatic chamber, the detector 7 is connected with a soap film flowmeter and an amplifier 9, the amplifier 9 is connected with a recorder 10, a sample inlet tube 11 is arranged at the top end of the vaporizing chamber 5, an upper silica gel pad 12 is arranged at the inner upper end of the sample inlet tube 11, a sample inlet is arranged on the upper silica gel pad 12, the lower end of the sample inlet pipe 11 is connected with a stainless steel lining pipe 13 communicated with a sample inlet, the upper end of the stainless steel lining pipe 13 is communicated with the output end of the flowmeter 4, a lower silica gel pad 14 is arranged at the lower port of the stainless steel lining pipe 13, a capillary column 15 communicated with the inside of the stainless steel lining pipe 13 is connected on the lower silica gel pad 14, the capillary column 15 is connected with the chromatographic column 6, the middle part of the stainless steel lining pipe 13 is provided with a ceramic heating body 16 connected with the outer wall of the stainless steel lining pipe 13, a tungsten paste printing circuit is arranged in the ceramic heating body 16, and an infrared temperature measuring sensor 17 capable of irradiating the outer surface of the stainless steel lining pipe 13 is arranged on the side wall of the vaporizing chamber 5; specifically, the stainless steel inner liner tube 13 and the ceramic heating body 16 are welded or bonded by high temperature glue.

When the technical scheme is used, the constant temperature box, the amplifier 9 and the recorder 10 are started, the sample liquid is added into the sample inlet, the stainless steel lining pipe 13 is heated by the ceramic heating body 16, the sample liquid is liquefied in the stainless steel lining pipe 13, the carrier gas steel cylinder 1 is started through the pressure reducing valve 2, the inert gas in the carrier gas steel cylinder 1 enters the stainless steel lining pipe 13 in the vaporization chamber 5 through the purifier 3 and the flowmeter 4, the vaporized sample enters the chromatographic column 6 and the detector 7 through the capillary column 15, the detection and analysis are carried out in the detector 7, and the signal is amplified through the amplifier 9 and is transmitted to the recorder 10 for recording, so that the detection is completed.

In this embodiment, bushing pipe 13 lower extreme intercommunication has the pressure range pipe 19 that extends to the thermostated chamber 8 outside in the stainless steel, be provided with manometer and solenoid valve on the pressure range pipe 19, infrared temperature sensor 17's model is PT-50A1, and the controller model is ARM9TDMI, ceramic heating body 16, manometer, solenoid valve and infrared temperature sensor 17 all are connected with the controller, and infrared temperature sensor 17 gives the controller with temperature signal transmission, and the controller can control opening and stopping of ceramic heating body 16, lets bushing pipe 13 in the stainless steel have the vaporization temperature that accords with the appearance liquid, and when bushing pipe 13 internal pressure was too big in the stainless steel moreover, the manometer transmits pressure signal for the controller, and the controller sends the instruction of opening for the solenoid valve and carries out the pressure release. For environmental protection, the outlet of the pressure discharge pipe 19 may be connected to a storage tank to prevent the discharged exhaust gas from entering the air.

In this embodiment, the infrared temperature measurement sensors 17 are three from top to bottom, measure the temperatures of different positions of the stainless steel lining pipe 13, and obtain a relatively accurate temperature through the calculated average value of the controller, thereby ensuring the accuracy of temperature measurement.

In this embodiment, the upper and lower ends of the stainless steel lining tube 13 are provided with the clamping members 18 which are connected with the inner wall of the vaporization chamber 5 and have different sizes, so as to ensure that the stainless steel lining tube 13 is connected firmly, and the connecting members can be sleeves with different diameters.

In this embodiment, the middle of the stainless steel lining tube 13 is spiral, the ceramic heating body 16 is cylindrical, the stainless steel lining tube 13 surrounds the outer wall of the ceramic heating body 16, and the outer wall of the stainless steel lining tube 13 directly contacts with the ceramic heating body 16, so that the heat transfer efficiency is high, and the heating time is reduced.

Example 2

Compared with the above embodiment, the difference is that: as shown in fig. 3, the middle of the stainless steel lining tube 13 is in a reciprocating zigzag shape, the cross section of the stainless steel lining tube is in a rectangular shape, the ceramic heating body 16 is in a sheet shape, and the ceramic heating body 16 is inserted into a zigzag gap of the stainless steel lining tube 13; the ceramic heating body 16 and the stainless steel lining pipe 13 have larger contact area, the heat transfer efficiency is improved, and the heating time of the stainless steel lining pipe 13 is further reduced.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an intelligent gas chromatograph, includes the carrier gas steel bottle, relief pressure valve, clarifier, flowmeter, vaporizer, chromatographic column, the detector that connect gradually, vaporizer, chromatographic column and detector are placed in the thermostated container, the detector is connected with soap-mask flowmeter and amplifier, the amplifier is connected with the record appearance, the vaporizer top is provided with into appearance pipe, and the upper end is provided with the silica gel pad in the appearance pipe, goes up the silica gel pad and has seted up introduction port, its characterized in that: the utility model discloses a solar water heater, including sample inlet, sampling tube, capillary column, ceramic heating member, tungsten thick liquid printing circuit, vaporization chamber lateral wall, it is equipped with the stainless steel interior bushing pipe that communicates with the introduction port to advance the sample tube lower extreme be connected with, the interior bushing pipe of stainless steel upper end and flowmeter's output intercommunication in the stainless steel, bushing pipe lower extreme department is provided with down the silica gel pad in the stainless steel, the silica gel pad is connected with the inside capillary column that is linked together of stainless steel interior bushing pipe down, the capillary column is connected with the chromatographic column, the bushing pipe middle part is provided with the ceramic heating member that is connected with stainless steel interior bushing pipe outer wall in the stainless steel, the inside.

2. The intelligent gas chromatograph of claim 1, wherein: the infrared temperature measurement sensors are arranged in a number of three from top to bottom.

3. The intelligent gas chromatograph of claim 1, wherein: and the upper end and the lower end of the stainless steel lining pipe are provided with clamping pieces which are connected with the inner wall of the vaporizing chamber and have different sizes.

4. The intelligent gas chromatograph of claim 1, wherein: the stainless steel lining pipe lower extreme intercommunication has the pressure pipe that extends to the thermostatic chamber outside, be provided with manometer and solenoid valve on the pressure pipe.

5. The intelligent gas chromatograph of claim 1, wherein: the middle part of the stainless steel lining pipe is in a spiral shape, the ceramic heating body is cylindrical, and the stainless steel lining pipe surrounds the outer wall of the ceramic heating body.

6. The intelligent gas chromatograph of claim 1, wherein: the middle part of the stainless steel lining pipe is in a reciprocating zigzag shape, the cross section of the stainless steel lining pipe is in a rectangular shape, the ceramic heating body is in a sheet shape, and the ceramic heating body is inserted into the zigzag gap of the stainless steel lining pipe.