CN216411003U

CN216411003U - Gas transmittance tester

Info

Publication number: CN216411003U
Application number: CN202122289102.8U
Authority: CN
Inventors: 吴爱平
Original assignee: Guangzhou Shounuo Scientific Instrument Co ltd
Current assignee: Guangzhou Shounuo Scientific Instrument Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-29
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses a gas transmittance tester, which comprises a machine body, a display screen, a main control chip arranged in the machine body and a testing cavity arranged at the top of the machine body, wherein the main control chip is electrically connected with a pressure difference control module and an electromagnetic temperature control module, the testing cavity consists of an upper pressure cavity and a lower pressure cavity, a pressure sensor and a temperature sensor are arranged on the inner side wall of the upper pressure cavity, a pressure sensor and a temperature sensor are arranged on the inner side wall of the lower pressure cavity, the pressure sensor and the temperature sensor are both electrically connected with the main control chip, a limit valve and a pressure difference control module electrically connected with the limit valve are arranged on the inner side wall of the upper pressure cavity, and the limit valve is controlled by the feedback of the pressure sensor so as to control the pressure difference between the upper pressure cavity and the lower pressure cavity, thereby achieving a constant pressure stable state and reducing experimental errors.

Description

Gas transmittance tester

Technical Field

The utility model relates to the technical field of transmittance testers, in particular to a gas transmittance tester.

Background

The transmittance tester is mainly suitable for measuring the water vapor transmittance of films such as plastic films and composite films, sheet materials, high-barrier materials, solar back panels, metal foils, waterproof rolls, packaging containers such as bottles, bags, cans and boxes made of materials such as plastics, rubber, paper, glass and metal. By measuring the transmittance, the technical indexes of products such as packaging materials and the like are controlled and adjusted, and different requirements of product application are met.

And lack the protection mechanism of a constant voltage at current gas permeability apparatus, and what adopt in the apparatus is outer hanging constant temperature equipment, has bulky, fault rate height and the great problem of potential safety hazard, at the continuous in-process that carries out of experiment, because the temperature variation in the test chamber can lead to pressing the intracavity with pushing down the intracavity differential pressure unstable, and lead to experimental data to have the error.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the gas transmittance tester, which achieves the control of constant temperature and constant pressure by arranging the pressure difference control module and the electromagnetic temperature control module, and improves the accuracy of experimental data.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a gas permeability apparatus, includes organism, display screen, locates the main control chip in the organism and locates the test chamber at organism top, main control chip electric connection has pressure differential control module and electromagnetism temperature control module, the test chamber comprises last pressure chamber and time chamber, upward be equipped with pressure sensor and temperature sensor on the pressure intracavity lateral wall, be equipped with pressure sensor on the time intracavity lateral wall, pressure sensor and temperature sensor all with main control chip electric connection.

Preferably, the main control chip is also electrically connected with a display module and a storage module, and the display module is in signal connection with the display screen.

Preferably, one end of the upper pressure cavity and one end of the lower pressure cavity are respectively connected with an air inlet pipeline and an evacuation pipeline.

Preferably, the air inlet pipeline is provided with a limit valve, and the limit valve is electrically connected with the differential pressure control module.

Preferably, one end of the evacuation pipeline is connected with a vacuum pump.

Preferably, a sample plate is arranged between the upper pressure cavity and the lower pressure cavity, and a through hole is formed in the sample plate.

(III) advantageous effects

Compared with the prior art, the utility model provides a gas transmittance tester, which has the following beneficial effects:

1. the utility model discloses a, through set up pressure sensor and temperature sensor on last pressure chamber inside wall, and set up limit valve and with limit valve electric connection's pressure differential control module, control the limit valve through pressure sensor's feedback, and then control and go up the pressure chamber and push down the pressure differential between the chamber to reach a constant voltage stable state, reduce the experimental error.

2. The utility model discloses a, through setting up temperature sensor and electromagnetism accuse temperature module, control heating device's automatic process of rising temperature and cooling, adopt the electromagnetism accuse temperature, for providing a stable, safe constant temperature, constant voltage environment in the test cavity, provide the guarantee for acquireing of experimental data.

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 the test chamber according to the present invention;

FIG. 3 is a block diagram of the present invention;

in the figure: 1. a body; 2. a test chamber; 3. a display screen; 4. a main control chip; 5. an upper pressure chamber; 6. a pressing cavity; 7. an air intake duct; 8. evacuating the pipeline; 9. a limiting valve; 10. a vacuum pump; 11. a pressure sensor; 12. a temperature sensor; 13. a differential pressure control module; 14. an electromagnetic temperature control module; 15. a display module; 16. a storage module; 17. and (4) a sample plate.

Detailed Description

In order to better understand the purpose, structure and function of the present invention, a gas transmittance measuring instrument according to the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1-3, a gas transmittance tester comprises a machine body 1, a display screen 3, a main control chip 4 disposed in the machine body 1 and a testing chamber 2 disposed on the top of the machine body 1, the main control chip 4 is electrically connected with a pressure difference control module 13 and an electromagnetic temperature control module 14, the main control chip 4 is further electrically connected with a display module 15 and a storage module 16, the display module 15 is in signal connection with the display screen 3, wherein the testing chamber 2 is composed of an upper pressure chamber 5 and a lower pressure chamber 6, one end of the upper pressure chamber 5 and one end of the lower pressure chamber 6 are respectively connected with an air inlet pipe 7 and an evacuation pipe 8, the air inlet pipe 7 is provided with a limit valve 9, the limit valve 9 is electrically connected with the pressure difference control module 13, one end of the evacuation pipe 8 is connected with a vacuum pump 10, the inner side wall of the upper pressure chamber 5 is provided with a pressure sensor 11 and a temperature sensor 12, the inner side wall of the lower pressure chamber 6 is provided with a pressure sensor 11, pressure sensor 11 and temperature sensor 12 all with main control chip 4 electric connection, are provided with sample board 17 between last pressure chamber 5 and lower pressure chamber 6, have seted up the through-hole on the sample board 17.

When the tester is used for an experiment, firstly, a processed sample membrane is placed on a sample plate 17 and fixed by furniture, then a vacuum pump 10 is used for vacuumizing the whole gas circuit system in a test cavity 2, and because pressure sensors 11 are arranged in an upper pressure cavity 5 and a lower pressure cavity 6, when a preset vacuum degree is reached, the lower pressure cavity 6 is closed, vacuumizing is stopped immediately, then experimental gas is injected into the upper pressure cavity 5 through an air inlet pipeline 7, so that a pressure difference is formed between the upper pressure cavity 5 and the lower pressure cavity 6, the experimental gas can permeate from a high pressure side to a low pressure side under the action of a pressure difference gradient, and various barrier property parameters of the tested sample are obtained through monitoring and processing of the pressure in the low pressure side;

because a constant pressure difference needs to be kept between the upper pressure cavity 5 and the lower pressure cavity 6 and the pressure difference needs to be adjustable, a pressure difference control module 13 is additionally arranged in the system, the pressure change in the cavity can be monitored by a pressure sensor 11 arranged in the test cavity 2, and the pressure difference in the test cavity 2 is stabilized by adjusting the limiting valve 9 through the main control chip 4;

in the process, the automatic heating and cooling processes of the heating device can be controlled through the action of the electromagnetic temperature control module 14 and the temperature sensor 12, a stable and safe constant-temperature and constant-pressure environment is provided for the test cavity 2, and the acquisition of experimental data is guaranteed;

in the testing process, experimental data such as pressure, pressure difference, temperature, permeability and the like can be observed on the display screen 3 in real time through the display module 15; this tester adopts two chambeies independent setting, and all is equipped with independent pressure sensor 11 and temperature sensor 12 in every test chamber 2, and every test chamber 2 all can the independent test, independently shuts down and trades appearance for efficiency of software testing is higher.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a gas permeability apparatus, includes organism (1), display screen (3), locate main control chip (4) in organism (1) and locate test cavity (2) at organism (1) top, its characterized in that: main control chip (4) electric connection has pressure differential control module (13) and electromagnetism accuse temperature module (14), test chamber (2) are pressed chamber (5) and are pushed down chamber (6) by last and constitute, it is equipped with pressure sensor (11) and temperature sensor (12) on pressing chamber (5) inside wall to go up, be equipped with pressure sensor (11) on pushing down chamber (6) inside wall, pressure sensor (11) and temperature sensor (12) all with main control chip (4) electric connection.

2. A gas permeability measuring instrument according to claim 1, wherein: the main control chip (4) is also electrically connected with a display module (15) and a storage module (16), and the display module (15) is in signal connection with the display screen (3).

3. A gas permeability measuring instrument according to claim 1, wherein: one end of the upper pressure cavity (5) and one end of the lower pressure cavity (6) are respectively connected with an air inlet pipeline (7) and an evacuation pipeline (8).

4. A gas permeability measuring instrument according to claim 3, wherein: and the air inlet pipeline (7) is provided with a limit valve (9), and the limit valve (9) is electrically connected with the differential pressure control module (13).

5. A gas permeability measuring instrument according to claim 3, wherein: one end of the evacuation pipeline (8) is connected with a vacuum pump (10).

6. A gas permeability measuring instrument according to claim 1, wherein: a sample plate (17) is arranged between the upper pressure cavity (5) and the lower pressure cavity (6), and a through hole is formed in the sample plate (17).