阅读说明：本技术 不同雾化液滴粒径测试装置和方法 (Device and method for testing particle sizes of different atomized liquid drops ) 是由 李祥春 柏盛 张琪 高佳星 王越 张龙 孙海彤 于 2020-08-07 设计创作，主要内容包括：本发明公开了一种不同雾化液滴粒径测试装置和方法,包括不同雾化液滴生成系统、粒径测试分析系统和控制系统；不同雾化液滴生成系统包括自上而下依次连接的压力表、储气室、电磁阀、单向阀一、储水室、单向阀二、雾化喷嘴,储气室通过导气管与高压空气瓶连接；粒径测试分析系统包括激光粒度分析仪和图像采集系统；电磁阀、激光粒度分析仪和图像采集系统分别与控制系统有线或无线连接。可以实现不同雾化液滴的生成及其粒径值的研究测试,从而为研究人员提供操作更为便捷的不同雾化液滴生成及粒径测试方式,以及详尽的雾化液滴粒径信息。(The invention discloses a device and a method for testing particle sizes of different atomized droplets, which comprise different atomized droplet generation systems, particle size testing and analyzing systems and control systems; the different atomized liquid drop generating systems comprise a pressure gauge, an air storage chamber, an electromagnetic valve, a one-way valve I, a water storage chamber, a one-way valve II and an atomizing nozzle which are sequentially connected from top to bottom, wherein the air storage chamber is connected with a high-pressure air bottle through an air guide pipe; the particle size test analysis system comprises a laser particle size analyzer and an image acquisition system; the electromagnetic valve, the laser particle size analyzer and the image acquisition system are respectively in wired or wireless connection with the control system. The device can realize the generation of different atomized droplets and the research and test of particle size values of the atomized droplets, thereby providing different atomized droplet generation and particle size test modes which are more convenient and faster to operate and detailed atomized droplet particle size information for researchers.)

1. A device for testing particle sizes of different atomized droplets is characterized by comprising different atomized droplet generation systems, a particle size testing and analyzing system and a control system;

the different atomized liquid drop generating systems comprise a pressure gauge, an air storage chamber, an electromagnetic valve, a one-way valve I, a water storage chamber, a one-way valve II and an atomizing nozzle which are sequentially connected from top to bottom, wherein the air storage chamber is connected with a high-pressure air bottle through an air guide pipe;

the particle size testing and analyzing system comprises a laser particle size analyzer and an image acquisition system;

the electromagnetic valve, the laser particle size analyzer and the image acquisition system are respectively in wired or wireless connection with the control system.

2. The device for testing particle sizes of various atomized droplets according to claim 1, wherein the air reservoir is a 304 steel cylinder structure.

3. The device for testing the particle sizes of the different atomized droplets according to claim 1, wherein the electromagnetic valve is a high pressure resistant electromagnetic valve.

4. The device for testing the particle sizes of the different atomized droplets according to claim 1, wherein the first check valve and the second check valve are high pressure-resistant check valves respectively.

5. The device for testing the particle sizes of the different atomized droplets according to claim 1, wherein the water storage chamber is a 304 steel high-pressure-resistant tee structure.

6. The device for testing the particle sizes of the different atomized droplets according to claim 1, wherein the atomizing nozzle is a brass high-pressure-resistant pneumatic pressure type atomizing nozzle, the nozzle is 48mm long, a rotating blade is arranged in the atomizing nozzle, and the diameter of the nozzle hole is 1.0 mm.

7. The device for testing particle sizes of different atomized droplets according to claim 1, wherein the air duct is a 304 steel high pressure resistant metal air duct.

8. The device for testing the particle sizes of different atomized droplets according to claim 1, wherein the image acquisition system comprises a NAC-GX3 high-speed camera, a cold light lamp and a picture processing unit;

the laser particle size analyzer adopts a Winner318A laser particle size analyzer and comprises a laser receiving unit and a laser emitting unit.

9. The device for testing the particle sizes of the different atomized droplets according to claim 1, further comprising a support reinforcing device, wherein the support reinforcing device is an aluminum alloy three-dimensional structure, and a fixed clamping plate is arranged in the middle of the support reinforcing device and vertically fixes the different atomized droplet generation systems.

10. A method for testing the particle size of different atomized droplets by the device for testing the particle size of different atomized droplets according to any one of claims 1 to 9, comprising the steps of:

firstly, an operator injects air with different pressures into air storage chambers in different atomized liquid droplet generating systems through air ducts by adjusting the outlet pressure of a high-pressure air bottle, after the reading of a pressure gauge is stable, the control system controls the opening of an electromagnetic valve to release the high-pressure air in the air storage chambers, the high-pressure air enters a water storage chamber through a one-way valve, liquid water in the water storage chamber is impacted into an atomizing nozzle at certain pressure, and required atomized liquid droplets are generated through the secondary atomization effect of the atomizing nozzle;

then, a particle size data acquisition module is started through a control system, data acquisition and test analysis are carried out on the particle sizes of atomized droplets generated by different atomized droplet generation systems, laser beams from a laser are subjected to filtering, beam expanding and filtering, then are changed into parallel rays through a collimating lens and then are irradiated to a test area, atomized droplet groups to be tested in the test area generate a scattering spectrum under the irradiation of the laser, the intensity and the spatial distribution of the scattering spectrum are related to the size and the distribution of the atomized droplet groups to be tested, the parallel rays are converged again through the lens and then are received by a photoelectric array detector positioned on a focal plane behind the lens, the atomized droplet groups to be tested are converted into electric signals, and the electric signals are amplified and subjected to A/D conversion and then are sent to a computer through a communication port, and the particle size and the distribution condition of the atomized droplets to be tested are.

Technical Field

The invention relates to a fire-fighting and mine safety technology, in particular to a device and a method for testing particle sizes of different atomized liquid drops.

Background

At present, the atomized liquid drop generation modes commonly used in the international society are mainly pneumatic pressure type atomization and ultrasonic atomization. The action principle of pneumatic pressure type atomization is as follows:

the liquid sprayed out of the nozzle is subjected to external acting force to form tiny liquid drops with various sizes, the liquid is firstly crushed under the comprehensive action of mechanical acting force, surface tension and extrusion and shearing of surrounding air media to be primarily atomized, in the process, circular jet crushing and thin liquid film jet crushing are two basic modes of primary atomization of the liquid, and the liquid drops formed by primary atomization are secondarily crushed to finally complete the atomization process; the action principle of ultrasonic atomization is as follows: the piezoelectric ceramic plate spontaneously starts high-frequency oscillation under the action of high-frequency oscillation voltage and emits ultrasonic waves, the ultrasonic waves act on the liquid surface, the liquid surface starts to break under the continuous impact of the ultrasonic waves, and the ultrasonic fine water mist with the granularity of only a few micrometers is gradually formed. The particle size of the atomized liquid drops is generally tested by two particle size detection devices, namely a phase Doppler particle analyzer and a laser particle size analyzer, wherein the phase Doppler particle analyzer determines the particle size by analyzing the phase shift generated by the scattered light reflected or refracted by the spherical particles passing through the laser measuring body; the laser particle size analyzer works on the principle that the scattering spectrum of a particle group is measured, and the particle size distribution of the particle group is analyzed through data processing of a computer, specifically, a laser beam from a laser is subjected to filtering, beam expanding and filtering, then is changed into parallel rays through a collimating lens and then is irradiated to a test area, the particle group to be tested in the test area generates the scattering spectrum under the irradiation of the laser, the intensity and the spatial distribution of the scattering spectrum are related to the size and the distribution of the particle group to be tested, and the parallel rays are converged again through the lens and then are received by a photoelectric array detector positioned on a focal plane behind the lens, and the scattering spectrum is converted into an electric signal, amplified and subjected to A/D conversion and then is sent to the computer through a communication port, and parameters such as the size, the distribution and the like of the particle group to be tested.

Aiming at the existing research results, a more complete and reliable explosion reaction process testing device with more convenient operation needs to be developed to know various information of the explosion process, so that theoretical information for inhibiting the chain reaction process is obtained, and a sufficient theoretical basis is provided for inhibiting explosion and reducing casualties and loss of explosion personnel.

Disclosure of Invention

The invention aims to provide a device and a method for testing particle sizes of different atomized liquid drops.

The purpose of the invention is realized by the following technical scheme:

the invention relates to a device for testing particle sizes of different atomized droplets, which comprises different atomized droplet generation systems, a particle size testing and analyzing system and a control system;

the different atomized liquid drop generating systems comprise a pressure gauge, an air storage chamber, an electromagnetic valve, a one-way valve I, a water storage chamber, a one-way valve II and an atomizing nozzle which are sequentially connected from top to bottom, wherein the air storage chamber is connected with a high-pressure air bottle through an air guide pipe;

the particle size testing and analyzing system comprises a laser particle size analyzer and an image acquisition system;

the electromagnetic valve, the laser particle size analyzer and the image acquisition system are respectively in wired or wireless connection with the control system.

The method for realizing the particle size test of different atomized droplets by the particle size test device of different atomized droplets comprises the following steps:

firstly, an operator injects air with different pressures into air storage chambers in different atomized liquid droplet generating systems through air ducts by adjusting the outlet pressure of a high-pressure air bottle, after the reading of a pressure gauge is stable, the control system controls the opening of an electromagnetic valve to release the high-pressure air in the air storage chambers, the high-pressure air enters a water storage chamber through a one-way valve, liquid water in the water storage chamber is impacted into an atomizing nozzle at certain pressure, and required atomized liquid droplets are generated through the secondary atomization effect of the atomizing nozzle;

then, a particle size data acquisition module is started through a control system, data acquisition and test analysis are carried out on the particle sizes of atomized droplets generated by different atomized droplet generation systems, laser beams from a laser are subjected to filtering, beam expanding and filtering, then are changed into parallel rays through a collimating lens and then are irradiated to a test area, atomized droplet groups to be tested in the test area generate a scattering spectrum under the irradiation of the laser, the intensity and the spatial distribution of the scattering spectrum are related to the size and the distribution of the atomized droplet groups to be tested, the parallel rays are converged again through the lens and then are received by a photoelectric array detector positioned on a focal plane behind the lens, the atomized droplet groups to be tested are converted into electric signals, and the electric signals are amplified and subjected to A/D conversion and then are sent to a computer through a communication port, and the particle size and the distribution condition of the atomized droplets to be tested are.

According to the technical scheme provided by the invention, the device and the method for testing the particle diameters of different atomized droplets can realize the generation of different atomized droplets and the research and test of particle diameter values of the atomized droplets, so that different atomized droplet generation and particle diameter test modes which are more convenient and faster to operate and detailed atomized droplet particle diameter information are provided for researchers. The operation is more convenient, more complete and more reliable, and various information of the explosion process can be known clearly, so that theoretical information for inhibiting the chain reaction process is obtained, and a sufficient theoretical basis is provided for inhibiting the explosion and reducing casualties and losses of explosion personnel.

Drawings

Fig. 1 is a schematic front view of a device for testing particle sizes of different atomized droplets according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the principal structure of various atomized droplet generation systems according to one embodiment of the present invention.

In the figure:

1-a pressure gauge; 2-an air storage chamber; 3-a high-pressure electromagnetic valve; 4-a one-way valve; 5-a water storage chamber; 6-a one-way valve; 7-a pneumatic atomizing nozzle; 8-304 steel gas-guide tube; 9-high pressure air bottle; 10-a pressure reducing valve; 11-laser particle size analyzer laser receiving unit; 12-laser particle size analyzer laser emission unit; 13-a control system; 14-NAC-GX3 high-speed camera.

Detailed Description

The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.

The invention discloses a device for testing particle sizes of different atomized droplets, which has the following preferred specific implementation modes:

comprises different atomized liquid drop generating systems, a particle size testing and analyzing system and a control system;

the different atomized liquid drop generating systems comprise a pressure gauge, an air storage chamber, an electromagnetic valve, a one-way valve I, a water storage chamber, a one-way valve II and an atomizing nozzle which are sequentially connected from top to bottom, wherein the air storage chamber is connected with a high-pressure air bottle through an air guide pipe;

the particle size testing and analyzing system comprises a laser particle size analyzer and an image acquisition system;

the electromagnetic valve, the laser particle size analyzer and the image acquisition system are respectively in wired or wireless connection with the control system.

The air storage chamber is of a 304 steel cylinder structure.

The electromagnetic valve is a high-pressure resistant electromagnetic valve.

The first check valve and the second check valve are high-pressure-resistant check valves respectively.

The water storage chamber is of a 304 steel high-pressure-resistant tee structure.

The atomizing nozzle is a high-pressure-resistant pneumatic pressure type atomizing nozzle made of brass, the nozzle is 48mm long, a rotating blade is arranged in the nozzle, and the diameter of the nozzle is 1.0 mm.

The air duct is a high-pressure resistant metal air duct made of 304 steel.

The image acquisition system comprises an NAC-GX3 high-speed camera, a cold light lamp and a picture processing unit.

The laser particle size analyzer adopts a Winner318A laser particle size analyzer and comprises a laser receiving unit and a laser emitting unit.

The device is characterized by further comprising a supporting and reinforcing device which is of an aluminum alloy three-dimensional structure, a fixed clamping plate is arranged in the middle of the supporting and reinforcing device, and the fixed clamping plate is used for vertically fixing different atomized liquid drop generating systems.

The method for realizing the particle size test of different atomized droplets by the particle size test device of different atomized droplets comprises the following steps:

firstly, an operator injects air with different pressures into air storage chambers in different atomized liquid droplet generating systems through air ducts by adjusting the outlet pressure of a high-pressure air bottle, after the reading of a pressure gauge is stable, the control system controls the opening of an electromagnetic valve to release the high-pressure air in the air storage chambers, the high-pressure air enters a water storage chamber through a one-way valve, liquid water in the water storage chamber is impacted into an atomizing nozzle at certain pressure, and required atomized liquid droplets are generated through the secondary atomization effect of the atomizing nozzle;

then, a particle size data acquisition module is started through a control system, data acquisition and test analysis are carried out on the particle sizes of atomized droplets generated by different atomized droplet generation systems, laser beams from a laser are subjected to filtering, beam expanding and filtering, then are changed into parallel rays through a collimating lens and then are irradiated to a test area, atomized droplet groups to be tested in the test area generate a scattering spectrum under the irradiation of the laser, the intensity and the spatial distribution of the scattering spectrum are related to the size and the distribution of the atomized droplet groups to be tested, the parallel rays are converged again through the lens and then are received by a photoelectric array detector positioned on a focal plane behind the lens, the atomized droplet groups to be tested are converted into electric signals, and the electric signals are amplified and subjected to A/D conversion and then are sent to a computer through a communication port, and the particle size and the distribution condition of the atomized droplets to be tested are.

The principle of the device and the method for testing the particle diameters of different atomized liquid drops is as follows:

the high-pressure air in the air storage chamber is led to carry the water in the water storage chamber into the atomizing nozzle in a high-pressure mode through the electromagnetic valve and the one-way valve by giving air with different pressures to the air storage chamber and controlling the opening of the electromagnetic valve through the control system, and the aim of generating different atomized liquid drops is fulfilled through the atomization effect of the atomizing nozzle;

the particle size data acquisition module is started through the control system, data acquisition and test analysis are carried out on the particle sizes of atomized droplets generated by different atomized droplet generation systems, laser beams from a laser are subjected to filtering, beam expanding and filtering, then are converted into parallel rays through a collimating lens and then are irradiated to a test area, a group of atomized droplets to be tested in the test area generates a scattering spectrum under the irradiation of the laser, the intensity and the spatial distribution of the scattering spectrum are related to the size and the distribution of the group of atomized droplets to be tested, the parallel rays are converged again through the lens and then are received by a photoelectric array detector positioned on a focal plane behind the lens, the photoelectric array detector is converted into an electric signal and then is sent to a computer through a communication port after the electric signal is amplified and subjected to A/D conversion, and the particle size and the distribution condition of the atomized droplets to be tested are;

the whole device for testing the particle sizes of different atomized droplets completes the generation of different atomized droplets and the test of the particle sizes of the different atomized droplets through the synergistic effect of the systems.

The device and the method for testing the particle diameters of the different atomized droplets can realize the generation of the different atomized droplets and the research and test of the particle diameter values of the different atomized droplets, thereby providing different atomized droplet generation and particle diameter test modes which are more convenient and faster to operate and detailed atomized droplet particle diameter information for researchers.