WO2021196424A1

WO2021196424A1 - Solid co2 cleaning system

Info

Publication number: WO2021196424A1
Application number: PCT/CN2020/097987
Authority: WO
Inventors: 陈水宣; 洪昭斌; 袁和平; 陈杰; 姚飞闪
Original assignee: 厦门理工学院; 厦门华联电子股份有限公司
Priority date: 2020-04-01
Filing date: 2020-06-24
Publication date: 2021-10-07
Also published as: CN111530847A; CN111530847B

Abstract

Disclosed is a solid CO₂ cleaning system, relating to the technical field of dry ice cleaning. According to the technical solution, the system is characterized by comprising a dry ice cleaning machine, a cleaning chamber, a cleaning quality monitoring device, and a parameter control module, wherein the dry ice cleaning machine comprises a main spray head and multiple auxiliary spray heads, the cleaning quality monitoring device comprises an image acquisition module used for acquiring a workpiece base material image and acquiring image information of a cleaned workpiece in real time and an image processing module used for processing an acquired image, the image processing module is used for comparing the acquired images and the base material image to determine a dirt position and a pollution degree of the workpiece, and the parameter control module is connected to the cleaning quality monitoring device and the dry ice cleaning machine and outputs, according to feedback information of the cleaning quality monitoring device, corresponding parameters to the dry ice cleaning machine for cleaning. According to the present invention, the workpiece can be hierarchically cleaned according to the pollution degree, intelligent cleaning is implemented, resources consumed by cleaning are saved, and the energy utilization rate is increased.

Description

A solid CO2 cleaning system

Technical field

The present invention relates to the technical field of dry ice cleaning, and more specifically, it relates to a solid CO ₂ cleaning system.

Background technique

Dry ice washing machine is a kind of washing machine, and the dry ice washing method has been developed rapidly all over the world. Dry ice is solid carbon dioxide, which is obtained by condensing carbon dioxide into a colorless liquid at a pressure of 6250.5498 kPa, and then rapidly solidifying at low pressure. Its cleaning system sprays the dry ice particles of the dry ice washer through high-pressure air to the work that needs cleaning. On the surface, the physical reflection of the temperature difference is used to cause different substances to break away at different shrinkage speeds. When the dry ice particles at -78 degrees Celsius come into contact with the dirt surface, they will embrittle and explode, which will shrink and loosen the dirt. The dry ice particles will instantly vaporize and expand 800 times. The product’s strong peeling force will quickly remove the dirt. Completely fall off from the surface of the object, so as to achieve a fast, efficient, safe and energy-saving cleaning effect.

For example, the authorized announcement number is CN205949415U and the Chinese patent with the announcement date of 2017.02.15 discloses a dry ice washing machine, which includes a main control cabinet and an ejector connected to the main control cabinet through a flexible pipeline. The ejector includes a nozzle, A valve that controls the opening and closing of the nozzle, the nozzle is provided with a laser pointer, and the laser pointer emits colored laser light along the length of the nozzle.

In the existing dry ice cleaning machine, the nozzle is positioned on the workpiece, and the cleaning can be started according to the set parameters, and the workpiece is gradually cleaned during the repeated cleaning of the workpiece. However, the existing equipment always sprays dry ice with initially set parameters for cleaning during cleaning, which cannot be adjusted adaptively according to the degree of cleaning of the workpiece, resulting in a large loss of dry ice and a waste of resources.

Summary of the invention

In view of the shortcomings of the prior art, the purpose of the present invention is to provide a solid CO ₂ cleaning system that can select corresponding dry ice cleaning parameters according to the cleaning conditions of the workpiece in real time, reduce dry ice loss, and have the effect of improving resource utilization.

In order to achieve the above objective, the present invention provides the following technical solutions:

A solid CO ₂ cleaning system, comprising a dry ice cleaning machine, a cleaning room arranged on the dry ice cleaning machine, a cleaning quality monitoring device arranged in the cleaning room, and a parameter control module arranged on the dry ice cleaning machine, the dry ice cleaning machine including a main jet Head and a plurality of auxiliary jet heads with gradually decreasing jet pressure and jet size. The cleaning quality monitoring device includes an image acquisition module for collecting images of the workpiece substrate and real-time acquisition of image information of the cleaning workpiece, and images for processing the acquired images Processing module, the image processing module is used to determine the location of the dirt and the degree of pollution according to the comparison between the captured image and the image of the substrate, the parameter control module is connected to the cleaning quality monitoring device and the dry ice washing machine, and the parameter control module is based on The cleaning quality monitoring device feedbacks information and outputs corresponding parameters to the dry ice cleaning machine for cleaning.

Further arrangement: the dry ice washing machine further includes a plurality of dry ice storage chambers, the size of the dry ice particles in each of the dry ice storage chambers is different, and the main spray head and the plurality of auxiliary spray heads are respectively connected to the plurality of dry ice according to the size of the dry ice particles Storage room.

It is further provided that the main spray head and the auxiliary spray head are respectively connected to the dry ice washing machine through a plurality of conveying pipes, each of which is provided with a flow valve and a pressure regulating valve, and the flow valve and the pressure regulating valve are both It is connected to the parameter control module, and the parameter control module outputs a parameter control adjustment signal to adjust the injection flow rate and pressure.

It is further provided that the spray pressure and spray size of the plurality of auxiliary spray heads decrease in an arithmetic series.

It is further provided that the dry ice cleaning machine further includes a movable seat and a driving mechanism for driving the movable seat to move around the workpiece, and the main spray head and the auxiliary spray head are both installed on the movable seat.

Further settings: the image acquisition module includes an observation optical lens and an imaging module arranged on the moving seat, the observation optical lens is used to capture an image of the surface of the workpiece and transport it to the imaging module, and the imaging module is used to The image is converted into an image and sent to the image processing module.

Further arrangement: the driving mechanism includes a reciprocating component and a lifting component arranged on the dry ice washing machine, the reciprocating component is used to drive the moving base to reciprocate in a horizontal direction, and the lifting component is used to drive the reciprocating component to move up and down. .

It is further provided that the lifting assembly includes a lifting cylinder installed on the dry ice washing machine and a lifting base connected with the lifting cylinder, and the reciprocating movement assembly is installed on the lifting base.

Further arrangement: the reciprocating movement assembly includes two positioning seats symmetrically installed at the bottom of the lifting seat, a rotating screw rod idled between the two positioning seats, and a drive motor connected to the rotating screw rod, between the two positioning seats There is a guide rod extending in the horizontal direction, the movable seat is slidably arranged on the guide rod, and the rotating screw rod passes through the movable seat and is threadedly connected with the movable seat.

Further setting: both the driving motor and the lifting cylinder are signal-connected to the parameter control module.

Compared with the prior art, the present invention has the following advantages by adopting the above technical solutions:

1. By setting the main jetting head and auxiliary jetting head, it is possible to select the jetting head corresponding to the jetting pressure and the size of the dry ice jet to clean the workpiece in the cleaning room according to the requirements of the cleaning parameters, so as to select reasonable cleaning parameters and avoid dry ice loss If it is too large, it has the effect of improving resource utilization;

2. Through the image acquisition module to collect images in the process of workpiece cleaning in real time, and the image processing module processes and analyzes the cleaning degree of the workpiece, which is fed back to the parameter control module, and the parameter control module switches the corresponding cleaning parameters in real time to the dry ice cleaning machine for cleaning , Can select the corresponding cleaning parameters according to the real-time cleaning of the workpiece, reduce the loss of dry ice, and have the effect of improving resource utilization;

3. By setting up multiple dry ice storage rooms for storing dry ice particles of different sizes, it is convenient to select dry ice particles of the corresponding size according to the needs of workpiece cleaning, and use dry ice rationally, which has the effect of improving resource utilization;

4. The moving seat is driven by the drive mechanism to facilitate the movement of the main spray head and the auxiliary spray head, so as to clean the parts located on the workpiece according to the cleaning requirements of the workpiece, so as to concentrate on the cleaning of the contaminated part of the workpiece, improve the cleaning efficiency and save the use of dry ice;

5. Through the cooperation of the reciprocating moving component and the lifting component, the moving seat can be driven to move in the horizontal and vertical directions, which is convenient for adjusting the position of the spray head, and has the effect of improving the convenience of cleaning the aligned workpiece.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a solid CO _{2 cleaning system;}

Figure 2 is a schematic diagram of the connection relationship between the parameter control module, the image acquisition module, the image processing module and the dry ice cleaning machine in the _{solid CO 2 cleaning system;}

Figure 3 is a schematic diagram of the connection relationship between the parameter control module and each device in the _{solid CO 2 cleaning system;}

Figure 4 is a schematic diagram of the structure of the cleaning chamber in the _{solid CO 2 cleaning system.}

In the picture: 1. Dry ice cleaning machine; 11. Main jetting head; 12. Auxiliary jetting head; 13. Dry ice storage room; 14. Output pipe; 15. Flow valve; 16. Pressure regulating valve; 17, Moving seat; 18. Driving mechanism; 1811, reciprocating moving assembly; 1811, positioning seat; 1812, rotating screw rod; 1813, driving motor; 1814, guide rod; 182, lifting assembly; 1821, lifting cylinder; 1822, lifting seat; 2. Cleaning room; 3. Cleaning quality monitoring device; 31. Image acquisition module; 311. Observation optical lens; 312. Imaging module; 32. Image processing module; 4. Parameter control module.

Detailed ways

With reference to Figures 1 to 4, the solid CO ₂ cleaning system will be further described.

A solid CO ₂ cleaning system, as shown in Figures 1 and 2, includes a dry ice cleaning machine 1, a cleaning chamber set on the dry ice cleaning machine 1, a cleaning quality monitoring device 3 set in the cleaning chamber 2, and a cleaning quality monitoring device 3 set in the cleaning chamber 2. The parameter control module 4 and the parameter control module 4 on the dry ice washing machine 1 are connected to the washing quality monitoring device 3 and the dry ice washing machine 1. The parameter control module 4 adjusts the washing parameters of the dry ice washing machine 1 in real time according to the washing quality monitoring device 3 to facilitate Adjust the amount of dry ice sprayed according to the cleaning condition of the workpiece to save energy.

As shown in Figures 1 and 3, the dry ice cleaning machine 1 includes a main spray head 11 arranged in the cleaning chamber 2 and a plurality of auxiliary spray heads 12 whose spray pressure and spray size are gradually reduced, and the main spray head 11 and the auxiliary spray head 12 are respectively connected to the dry ice washing machine 1 through a plurality of conveying pipes. A flow valve 15 and a pressure regulating valve 16 are provided on the multiple delivery pipes. Both the flow valve 15 and the pressure regulating valve 16 are connected to the parameter control module 4, and the parameter control module 4 outputs a parameter control adjustment signal for injection flow and pressure. The size adjustment is convenient to adjust the flow value and pressure value, and control the dry ice spray pressure and spray volume. Among them, the ejection pressure and ejection size of the multiple auxiliary ejection heads 12 are reduced in an arithmetic series. After the main ejection head 11 cleans the workpiece once, the lower secondary ejection head 12 is used to clean the workpiece successively to ensure effective While cleaning, it saves dry ice consumption and has the effect of improving energy efficiency.

As shown in FIG. 1, further, the dry ice cleaning machine 1 further includes a plurality of dry ice storage chambers 13, and the dry ice particles in each dry ice storage chamber 13 are of different sizes. They are respectively connected to a plurality of dry ice storage chambers 13, so as to facilitate the provision of dry ice particles of different sizes for cleaning, and meet the requirements of various cleaning parameters.

As shown in Fig. 1, further, the dry ice cleaning machine 1 further includes a movable seat 17 and a driving mechanism 18 for driving the movable seat 17 to move around the workpiece. The main spray head 11 and the auxiliary spray head 12 are both mounted on the movable seat 17, and Therefore, the main spray head 11 and the auxiliary spray head 12 can move synchronously, and both can clean the workpiece. The driving mechanism 18 includes a reciprocating movement assembly 181 and a lifting assembly 182 provided on the dry ice cleaning machine 1. The reciprocating movement assembly 181 is used to drive the moving base 17 to reciprocate in a horizontal direction, and the lifting assembly 182 is used to drive the reciprocating movement assembly 181. The lifting movement, and the reciprocating movement assembly 181 and the lifting assembly 182 are both connected to the parameter control module 4 to facilitate intelligent control and improve efficiency.

As shown in Figures 1 and 4, specifically, the lifting assembly 182 includes a lifting cylinder 1821 installed on the dry ice cleaner 1 and a lifting base 1822 connected to the lifting cylinder 1821, and the reciprocating movement assembly 181 is installed on the lifting base 1822, thereby The lifting base 1822 is pushed up and down by the lifting cylinder 1821 to drive the reciprocating movement assembly 181 and the moving base 17 to go up and down.

The reciprocating movement assembly 181 includes two positioning bases 1811 symmetrically installed at the bottom of the lifting base 1822, a rotating screw 1812 idling between the two positioning bases 1811, and a drive motor 1813 connected to the rotating screw 1812. One of the two positioning bases 1811 A guide rod 1814 extending in the horizontal direction is fixedly arranged in the middle. The movable seat 17 is slidably arranged on the guide rod 1814 along the extending direction of the guide rod 1814. The rotating shaft of 1813 is connected with the rotating screw 1812, and the driving motor 1813 adopts a bidirectional motor, which can drive the rotating screw 1812 to rotate forward or reverse. The rotating screw 1812 is driven to rotate by the drive motor 1813, and the movable seat 17 can be driven to reciprocate in the horizontal direction, so that the main spraying head 11 and the auxiliary spraying head 12 can clean the workpieces, and it is convenient to clean different workpieces. Meet the cleaning requirements of different parameters. Further, both the driving motor 1815 and the lifting cylinder 1821 are controlled by the parameter control module 4, which facilitates automatic control and improves efficiency.

As shown in Figures 2 and 3, the cleaning quality monitoring device 3 includes an image acquisition module 31 for collecting images of the workpiece substrate and real-time acquisition of image information of the cleaning workpiece, and an image processing module 32 for processing the collected images. The image processing module 32 is used to judge the location of the dirt and the degree of contamination according to the comparison between the collected image and the image of the substrate. After the image processing module 32 judges, the feedback signal is sent to the parameter control module 4, and the parameter control module 4 outputs the corresponding information according to the feedback information of the cleaning quality monitoring device 3. The parameters are cleaned by the dry ice cleaning machine 1 to realize real-time selection of the corresponding dry ice cleaning parameters according to the cleaning conditions of the workpieces, reducing the loss of dry ice, and having the effect of improving resource utilization.

As shown in FIGS. 3 and 4, specifically, the image acquisition module 31 includes an observation optical lens 311 disposed on the movable seat 17 and an imaging module 312 connected to the observation optical lens 311, and the observation optical lens 311 is used to photograph the surface image of the workpiece. The imaging module 312 is used to convert the image of the surface of the workpiece into an image and send it to the image processing module 32. In order to facilitate the observation of the optical lens 311 to photograph the workpiece, the observation optical lens 311 is arranged on the side of the movable seat 17 away from the moving direction. When the movable seat 17 drives the main jetting head 11 and the auxiliary jetting head 12 to spray dry ice, the observation optical lens 311 is located at the rear end of the cleaning path. It can record the surface of the workpiece after the spray head cleans the workpiece. On the one hand, it is convenient for real-time collection of the outer surface of the workpiece during cleaning, and on the other hand, it is more conducive to shooting during cleaning. Image acquisition facilitates accurate imaging of the surface of the workpiece and improves the accuracy of identification.

As shown in FIG. 3, the image processing module 32 processes the imaged image, and a computer with digital image processing function can be selected. When in use, the image acquisition module 31 is first used to photograph the substrate workpiece to obtain the workpiece substrate image, so that the image processing module 32 records the texture and gray value of the substrate image. Then the image acquisition module 31 collects the cleaning image of the workpiece to be cleaned during the cleaning process in real time. Generally, a cleaning image is collected after the moving seat 17 reciprocates once. The image processing module 32 compares the texture and gray value of the cleaning image with the substrate image. . If the comparison result is similar or the same, it is judged to be the base material, and there is no need for deep cleaning at this place. The feedback signal is sent to the parameter control module 4 to control the smaller auxiliary jet head 12 to clean the workpiece again to complete the cleaning, which is very convenient And save resources; if there is a big difference with the base material, it is judged not to be a base material, and the surface workpiece is not cleaned. The remaining thickness of the workpiece dirt is judged based on the difference texture and gray value size comparison, so as to feed back to the parameter control module 4 Above, the parameter control module 4 controls the spray head corresponding to the pressure and spray volume to clean, and then circulates until the workpiece is cleaned. Intelligent cleaning is realized, cleaning resources are saved, and energy utilization is improved.

As shown in Fig. 3, the parameter control module 4 is set by a PLC controller, which facilitates automatic control of the cleaning process and improves the cleaning efficiency. Several sets of cleaning parameters corresponding to the number of auxiliary jet heads 12 can be set in the PLC controller, and the corresponding sets of contrast difference intervals can be set for the contrast difference of the image in the image processing module 32. The contrast difference interval and the cleaning parameters The number is one-to-one correspondence, so that it is convenient to control the spray heads one-to-one, and facilitate hierarchical cleaning of workpieces according to the degree of pollution, realize intelligent cleaning, save cleaning resources, and improve energy utilization.

Working principle: When in use, the image acquisition module 31 is used to collect images of the neat workpiece to form a base material image, and then the workpiece to be cleaned is placed in the cleaning chamber 2 for cleaning. First, the main jetting head 11 is used to clean the workpiece. During the cleaning process, the image acquisition module 31 collects the cleaning effect in real time and feeds it back to the image processing module 32 to form a cleaning image. The image processing module 32 compares the cleaning image with the substrate image. After the pairing is fed back to the parameter control module 4, the parameter control module 4 adjusts the cleaning parameters according to the comparison results, controls the use of the corresponding auxiliary jet head 12 for cleaning, and adjusts the flow valve 15 and the pressure regulating valve 16 to control the flow value and pressure value , In order to quickly clean the workpiece. Through the above solution, the workpiece can be cleaned hierarchically according to the degree of pollution, intelligent cleaning can be realized, resources lost during cleaning can be saved, and energy utilization rate can be improved.

The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments. All technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications made without departing from the principle of the present invention, these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

A solid CO 2 cleaning system, which is characterized by comprising a dry ice cleaning machine (1), a cleaning chamber (2) provided on the dry ice cleaning machine (1), and a cleaning quality monitoring device (2) provided in the cleaning chamber (2) 3) and a parameter control module (4) arranged on the dry ice washing machine (1), the dry ice washing machine (1) comprising a main spray head (11) and a plurality of auxiliary spray heads ( 12) The cleaning quality monitoring device (3) includes an image acquisition module (31) for collecting images of the workpiece substrate and real-time collection of image information of the cleaning workpiece, and an image processing module (32) for processing the collected images, so The image processing module (32) is used for judging the location of the dirt and the degree of pollution according to the comparison between the collected image and the image of the substrate, and the parameter control module (4) is connected to the cleaning quality monitoring device (3) and the dry ice cleaning machine (1) , And the parameter control module (4) outputs corresponding parameters to the dry ice washing machine (1) for washing according to the feedback information of the washing quality monitoring device (3).
The solid CO 2 cleaning system according to claim 1, wherein the dry ice cleaning machine (1) further comprises a plurality of dry ice storage chambers (13), and the dry ice in each of the dry ice storage chambers (13) The particle sizes are different, and the main jetting head (11) and the plurality of auxiliary jetting heads (12) are respectively connected in a plurality of dry ice storage chambers (13) according to the size of the dry ice particles.
The solid CO 2 cleaning system according to claim 2, wherein the main spray head (11) and the auxiliary spray head (12) are respectively connected to the dry ice cleaning machine (1) through a plurality of conveying pipes, A flow valve (15) and a pressure regulating valve (16) are provided on a plurality of the delivery pipes. The flow valve (15) and the pressure regulating valve (16) are both connected to the parameter control module (4), The parameter control module (4) outputs a parameter control adjustment signal to adjust the injection flow and pressure.
The solid CO 2 cleaning system according to claim 1, characterized in that the spray pressure and spray size of the plurality of auxiliary spray heads (12) decrease in an arithmetic series.
The solid CO 2 cleaning system according to claim 1, wherein the dry ice cleaning machine (1) further comprises a movable seat (17) and a driving mechanism (17) for driving the movable seat (17) to move around the workpiece. 18), the main spray head (11) and the auxiliary spray head (12) are both installed on the movable seat (17).
The solid CO 2 cleaning system according to claim 5, characterized in that the image acquisition module (31) comprises an observation optical lens (311) and an imaging module (312) arranged on the movable seat (17), The observation optical lens (311) is used to photograph the surface image of the workpiece and send it to the imaging module (312), and the imaging module (312) is used to convert the image of the surface of the workpiece into an image and send it to the image processing module (32) superior.
The solid CO 2 cleaning system according to claim 5, characterized in that the driving mechanism (18) comprises a reciprocating component (181) and a lifting component (182) arranged on the dry ice washing machine (1), The reciprocating movement component (181) is used to drive the moving base (17) to reciprocate in a horizontal direction, and the lifting component (182) is used to drive the reciprocating movement component (181) to move up and down.
The solid CO 2 cleaning system according to claim 7, wherein the lifting assembly (182) comprises a lifting cylinder (1821) installed on the dry ice cleaning machine (1) and connected to the lifting cylinder (1821) The lifting seat (1822), the reciprocating movement assembly (181) is installed on the lifting seat (1822).
The solid CO 2 cleaning system according to claim 8, wherein the reciprocating movement assembly (181) includes two positioning seats (1811) symmetrically installed at the bottom of the lifting seat (1822), and two positioning seats (1811) are idling at the bottom of the lifting seat (1822). The rotating screw rod (1812) between the seats (1811) and the driving motor (1813) connected with the rotating screw rod (1812), and a horizontally extending guide rod (1814) is arranged between the two positioning seats (1811) ), the movable seat (17) is slidably arranged on the guide rod (1814), and the rotating screw rod (1812) passes through the movable seat (17) and is threadedly connected with the movable seat (17).
The solid CO 2 cleaning system according to claim 9, wherein the driving motor (1815) and the lifting cylinder (1821) are both signally connected to the parameter control module (4).