CN214473101U

CN214473101U - Gas multiplier

Info

Publication number: CN214473101U
Application number: CN202023073455.6U
Authority: CN
Inventors: 汪献忠; 李建国; 董良
Original assignee: Henan Relations Co Ltd
Current assignee: Henan Relations Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-10-22
Anticipated expiration: 2030-12-18

Abstract

The utility model provides a gas multiplier, including the draft tube, draft tube right-hand member portion lock has the cover, the bleeder vent that corresponds the intercommunication with the draft tube is seted up at the cover middle part, annular guiding gutter has been seted up to draft tube right-hand member face, draft tube one side is connected with the compressed gas intake pipe, the gas outlet and the annular guiding gutter intercommunication of compressed gas intake pipe, cover left end face outer lane is equipped with the external seal lock ring that corresponds the assembly through the tang structure with draft tube right-hand member face outer lane, cover left end face inner circle is equipped with the interior lock ring that stretches into cover right-hand member mouth inside, interior lock ring and the annular gas jet seam of formation between the right-hand member mouth inner circle of draft tube, cover left end face is equipped with the annular channel who is used for communicateing gas jet seam and annular guiding gutter. The utility model discloses the principle science, simple structure, the manufacturing of being convenient for, it is energy-conserving, gas mixing is fast and the degree of consistency is high, has improved the efficiency and the degree of accuracy of sensor test greatly. The utility model discloses other suitable gaseous axial occasions with higher speed can also be used.

Description

Gas multiplier

Technical Field

The utility model relates to a sensor capability test technical field, concretely relates to a gas multiplier for with gaseous homogeneous mixing.

Background

The widespread use of gas sensors has led to the rapid development of the gas sensor industry, especially low concentration gas sensors (e.g., PPM level gas sensors), volatile gas or toxic and harmful gas sensors, which have been developed more rapidly due to their special use. The existing backward gas sensor testing equipment limits the rapid development of the gas sensor industry.

The performance of the gas sensor is greatly influenced by temperature and gas humidity, batch testing cannot be performed, the testing process of the testing tool applied at the current stage is complicated, the number of the testing tools to be tested is 1-3 less at each time, and the environmental parameters (temperature, humidity and gas concentration) of the testing tool during testing of each sensor are different to some extent, so that the consistency of the measured performance of the sensor is poor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a gas multiplier which can evenly mix the gas in a test box as soon as possible when the sensors are tested in batches.

In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides a gas multiplier, including the draft tube that the central line set up along left right direction level, draft tube right-hand member portion lock has the cover, the bleeder vent that corresponds the intercommunication with the draft tube is seted up at the cover middle part, annular guiding gutter has been seted up with the axial to draft tube right-hand member face, draft tube one side is connected with the compressed gas intake pipe, the gas outlet and the annular guiding gutter intercommunication of compressed gas intake pipe, cover left end face outer lane is equipped with the external seal lock ring that corresponds the assembly through the tang structure with draft tube right-hand member face outer lane, cover left end face inner circle is equipped with the interior lock ring that stretches into cover right port inside, form annular gas injection seam between interior lock ring and the draft tube right-hand member mouth inner circle, cover left end face is equipped with the annular channel who is used for communicateing gas injection seam and annular guiding gutter.

The cylinder cover, the outer sealing buckling ring and the inner buckling ring guide cylinder are integrally manufactured, the outer circle on the left side of the guide cylinder is a first conical surface which is thin on the left and thick on the right, and the guide cylinder is connected with the outer sealing buckling ring through a countersunk head screw.

An inner circle of the left side part of the guide cylinder is a second conical surface with a thick left side and a thin right side, and a part of the inner circle of the guide cylinder between the minimum diameter position of the second conical surface and the air injection seam is a third conical surface with a thin left side and a thick right side.

The side part of the guide shell is provided with an internal thread hole communicated with the annular guide groove along the radial direction, and the front end of the compressed gas inlet pipe extends into the internal thread hole and is in threaded connection with the internal thread hole.

The size of the air jet gap is 1-2 mm.

By adopting the technical scheme, the utility model is arranged at the right side in the sensor testing box and is used for uniformly spraying the inlet air and pumping the airflow at the right port of the cylinder cover to the left side, and is a power source for generating circulation of the gas in the sensor testing box; the utility model discloses according to the hydrodynamics principle-attaches the wall effect, only use a small amount of compressed gas as the power supply, compressed gas loops through the compressed gas intake pipe, annular guiding gutter and annular channel, spout backward along the third conical surface by annular jet-propelled seam at last, then along second conical surface blowout draft tube again, it forms the primary air current that sprays left to drive the inside and cover right side of draft tube surrounding gas flow, this strand of primary air current adsorbs the interior round surface at the draft tube, so produce a low-pressure zone at draft tube cavity center, therefore a large amount of gas is inhaled on every side, primary air current and surrounding air current converge the back just form high-speed, high-capacity air current, the flow is the several times of gas consumption, moreover, the steam generator is simple in structure, and is low in cost. The device can reduce other devices or materials which are easy to adsorb gas in the sensor test box, achieve the aim of uniformly mixing the gas in the sensor test box, and simultaneously reduce the influence of the adsorption of the gas on the concentration of the gas in the closed test box when a trace gas experiment is carried out on the sensor.

The length and the taper of a second conical surface and a third conical surface of the guide cylinder are reasonably designed, a left shunting conical cylinder and a right shunting conical cylinder (which are the same as the center line of the guide cylinder) are respectively arranged on the left inner wall and the right inner wall of the sensor test box, the left shunting conical cylinder diffuses the airflow from left to right in the vertical and front-back directions and then turns back to the right, and the right shunting conical cylinder guides the airflow turned back from right to left into the right port of the cylinder cover towards the center; therefore, a uniform and stable flow field is formed in the sensor test box, and the concentration, the humidity and the temperature of the gas entering the sensor test box are uniformly distributed.

To sum up, the utility model discloses the principle science, simple structure is convenient for make, and is energy-conserving, and gas mixing is fast and the degree of consistency is high, has improved the efficiency and the degree of accuracy of sensor test greatly. The utility model discloses other suitable gaseous axial occasions with higher speed can also be used.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic axial sectional view of the present invention;

fig. 3 is an enlarged view at a in fig. 1.

Detailed Description

As shown in fig. 1-3, the utility model discloses a gas multiplier, draft tube 23 that includes the central line along left right direction level setting, draft tube 23 right-hand member portion lock has cover 24, cover 24 middle part is seted up and is corresponded the bleeder vent of intercommunication with draft tube 23, annular guiding gutter 25 has been seted up with the axial to the draft tube 23 right-hand member face, draft tube 23 one side is connected with compressed gas intake pipe 26, compressed gas intake pipe 26's gas outlet and annular guiding gutter 25 intercommunication, cover 24 left end face outer lane is equipped with the outer sealed lock ring 27 that corresponds the assembly through the tang structure with guide tube 23 right-hand member end face outer lane, cover 24 left end face inner circle is equipped with the interior lock ring 28 that stretches into cover 24 right port inside, form annular gas injection seam 29 between interior lock ring 28 and the guide tube 23 right end mouth inner circle, the gap size of gas injection seam 29 is 1-2mm, cover 24 left end face is equipped with annular channel 30 that is used for communicateing gas injection seam 29 and annular guiding gutter 25.

The guide shell 23 is integrally manufactured by the shell cover 24, the outer sealing buckling ring 27 and the inner buckling ring 28, the outer circle on the left side of the guide shell 23 is a first conical surface 31 which is thin on the left and thick on the right, and the guide shell 23 is connected with the outer sealing buckling ring 27 by using countersunk screws (the arrangement of the first conical surface 31 is convenient for forming countersunk slotted holes to install countersunk screws); the inner circle of the left side part of the guide cylinder 23 is a second conical surface 32 with a left thickness and a right thickness, and the part of the inner circle of the guide cylinder 23 between the minimum diameter position of the second conical surface 32 and the air injection slit 29 is a third conical surface 33 with a left thickness and a right thickness.

The rear side of the guide shell 23 is provided with an internal thread hole communicated with the annular guide groove 25 along the radial direction, and the front end of the compressed gas inlet pipe 26 extends into and is in threaded connection with the internal thread hole.

The utility model is arranged at the right side in the sensor test box and is used for uniformly spraying the inlet air and pumping the airflow at the right port of the cylinder cover 24 to the left side, which is a power source for generating circulation of the gas in the sensor test box; the utility model discloses according to the hydrodynamics principle-attaches the wall effect, only use a small amount of compressed gas as the power supply, compressed gas loops through compressed gas intake pipe 26, annular guiding gutter 25 and annular channel 30, spout backward along third conical surface 33 by annular jet-propelled seam 29 at last, then spout draft tube 23 along second conical surface 32 again, it forms the primary air current of left injection to drive the inside and 24 right sides of draft tube 23 surrounding gas flow, this strand of primary air current adsorbs at the interior surface of draft tube 23, then produce a low-pressure area at draft tube 23 cavity center, therefore a large amount of gas is inhaled on every side, just form high speed, high capacity's air current after primary air current and surrounding air current converge, the flow is several times of gas consumption, moreover, the steam generator is simple in structure, and low cost. The device can reduce other devices or materials which are easy to adsorb gas in the sensor test box, achieve the aim of uniformly mixing the gas in the sensor test box, and simultaneously reduce the influence of the adsorption of the gas on the concentration of the gas in the closed test box when a trace gas experiment is carried out on the sensor. The arrows shown in fig. 2 indicate the direction of the high pressure gas flow.

The air inflow of the compressed gas inlet pipe 26 and the size of the sensor test box are reasonably designed, the length and the taper of a second conical surface 32 and a third conical surface 33 of the guide cylinder are reasonably designed, a left flow distribution conical cylinder and a right flow distribution conical cylinder (which are the same as the center line of the guide cylinder 23) are respectively arranged on the left inner wall and the right inner wall of the sensor test box, the left flow distribution conical cylinder diffuses the airflow from left to right in the up-down and front-back directions and then turns back to the right, and the right flow distribution conical cylinder guides the airflow turned back from right to left to the center into the right port of the cylinder cover 24; therefore, a uniform and stable flow field is formed in the sensor test box, and the concentration, the humidity and the temperature of the gas entering the sensor test box are uniformly distributed.

The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.

Claims

1. A gas multiplier, characterized by: including the draft tube that the central line set up along left right direction level, draft tube right-hand member portion lock has the cover, the bleeder vent that corresponds the intercommunication with the draft tube is seted up at the cover middle part, annular guiding gutter has been seted up with the axial to the draft tube right-hand member face, draft tube one side is connected with the compressed gas intake pipe, the gas outlet and the annular guiding gutter intercommunication of compressed gas intake pipe, cover left end face outer lane is equipped with the outer seal lock ring that corresponds the assembly through the tang structure with draft tube right-hand member face outer lane, cover left end face inner circle is equipped with the interior lock ring that stretches into the cover right-hand member mouth inside, interior lock ring forms annular gas injection seam between ring and the draft tube right-hand member mouth inner circle, cover left end face is equipped with the annular channel who is used for communicateing gas injection seam and annular guiding gutter.

2. A gas multiplier as claimed in claim 1, wherein: the cylinder cover, the outer sealing buckling ring and the inner buckling ring guide cylinder are integrally manufactured, the outer circle on the left side of the guide cylinder is a first conical surface which is thin on the left and thick on the right, and the guide cylinder is connected with the outer sealing buckling ring through a countersunk head screw.

3. A gas multiplier as claimed in claim 1 or 2, wherein: an inner circle of the left side part of the guide cylinder is a second conical surface with a thick left side and a thin right side, and a part of the inner circle of the guide cylinder between the minimum diameter position of the second conical surface and the air injection seam is a third conical surface with a thin left side and a thick right side.

4. A gas multiplier as claimed in claim 1 or 2, wherein: the side part of the guide shell is provided with an internal thread hole communicated with the annular guide groove along the radial direction, and the front end of the compressed gas inlet pipe extends into the internal thread hole and is in threaded connection with the internal thread hole.

5. A gas multiplier as claimed in claim 1 or 2, wherein: the size of the air jet gap is 1-2 mm.