阅读说明：本技术 一种流水线火焰消毒装置 (Assembly line flame degassing unit ) 是由 李晖 吴怡 蔡坚勇 于 2021-03-11 设计创作，主要内容包括：本发明公开一种流水线火焰消毒装置,其包括传送装置和火焰喷枪阵列,所述火焰喷枪阵列包括环形的燃气分配管,燃气分配管环绕于传送装置外侧,燃气分配管的管壁上间隔连接有多个喷枪,且各喷枪的火焰喷射方向分别指向传送装置,所述燃气分配管的进气口连接至燃气源；从各喷枪喷出的火焰形成密织火焰幕网。本发明能在保护物品安全的前提下,实现物品外包装表面的无死角的消杀,从而能够避免或减少冷链物品携带和传染病毒的风险。(The invention discloses an assembly line flame disinfection device which comprises a conveying device and a flame spray gun array, wherein the flame spray gun array comprises an annular gas distribution pipe, the gas distribution pipe surrounds the outer side of the conveying device, a plurality of spray guns are connected to the pipe wall of the gas distribution pipe at intervals, the flame spraying directions of the spray guns respectively point to the conveying device, and the gas inlet of the gas distribution pipe is connected to a gas source; the flames from each lance form a dense woven flame curtain mesh. The invention can realize the killing of the surface of the outer package of the article without dead angles on the premise of protecting the safety of the article, thereby avoiding or reducing the risk of carrying and infecting viruses of cold chain articles.)

1. An assembly line flame disinfection device which is characterized in that: the flame spraying gun device comprises a conveying device and a flame spraying gun array, wherein the flame spraying gun array comprises an annular gas distribution pipe, the gas distribution pipe surrounds the outer side of the conveying device, a plurality of spraying guns are connected to the pipe wall of the gas distribution pipe at intervals, the flame spraying directions of the spraying guns point to the conveying device respectively, and the gas inlet of the gas distribution pipe is connected to a gas source; the flames from each lance form a dense woven flame curtain mesh.

2. An in-line flame disinfection apparatus as claimed in claim 1, wherein: the gas source comprises a gas tank and a gas pipe, the gas outlet of the gas tank is connected to the gas inlet of the gas distribution pipe through the gas pipe, and the gas pipe is connected with a pressure control valve.

3. An in-line flame disinfection apparatus as claimed in claim 1 or claim 2, wherein: and the spray gun is connected with an air flow valve.

4. An in-line flame disinfection apparatus as claimed in claim 1, wherein: and the spray guns connected on the gas distribution pipe are arranged in a linear array or an area array.

5. An in-line flame disinfection apparatus as claimed in claim 1, wherein: the conveying device is composed of two conveying belts arranged at intervals, and the fuel gas distribution pipe is located in an interval space between the two conveying belts.

6. An in-line flame disinfection apparatus as claimed in claim 1, wherein: the conveying device is a roller type conveying belt, and the fuel gas distribution pipe is located between two adjacent rollers.

7. An in-line flame disinfection apparatus as claimed in claim 1, wherein: the gas distribution pipe is of a rectangular, circular or window frame structure with an irresistible shape.

8. An in-line flame disinfection apparatus as claimed in claim 1, wherein: the plane of the gas distribution pipe is vertical to the conveying direction of the conveying device.

Technical Field

The invention relates to the field of disinfection devices, in particular to an assembly line flame disinfection device.

Background

Currently, new coronavirus has been abused worldwide, and the situation of new coronavirus was tested on cold chain food outer packaging and express packaging. At present, virus on cold chain articles is killed mainly by manually smearing or spraying a chemical disinfectant, so that the defects of limited time efficiency, heavy manual work, difficult field environmental odor tolerance and the like exist.

Disclosure of Invention

The invention aims to provide an assembly line flame disinfection device to achieve the purpose of killing the surfaces of outer packages of articles without dead angles, so that the risks of carrying cold chain articles and infecting viruses can be avoided or reduced. .

In order to achieve the purpose, the invention adopts the following technical scheme:

a flame disinfection device for an assembly line comprises a conveying device and a flame spray gun array, wherein the flame spray gun array comprises an annular gas distribution pipe, the gas distribution pipe surrounds the outer side of the conveying device, a plurality of spray guns are connected to the pipe wall of the gas distribution pipe at intervals, the flame spraying directions of the spray guns point to the conveying device respectively, and an air inlet of the gas distribution pipe is connected to a gas source; the flames from each lance form a dense woven flame curtain mesh.

Further, the gas source includes gas jar and gas-supply pipe, the gas outlet of gas jar is connected to the air inlet of gas distributing pipe through the gas-supply pipe, be connected with the pressure control valve on the gas-supply pipe.

Further, an air flow valve is connected to the spray gun.

Furthermore, the spray guns connected with the gas distribution pipe are arranged in a linear array or an area array.

Furthermore, the conveying device is composed of two conveying belts arranged at intervals, and the fuel gas distribution pipe is located in an interval space between the two conveying belts.

Further, the conveying device is a roller type conveying belt, and the fuel gas distribution pipe is located between two adjacent rollers.

Furthermore, the gas distribution pipe is of a rectangular, circular or window frame structure with an irresistible shape.

Further, the plane of the gas distribution pipe is perpendicular to the conveying direction of the conveying device.

The present invention is based on the principle of burning and killing microbe with high temperature flame, also known as burning sterilization, and may be used in dry heat sterilization under extremely high temperature condition. High temperature flame kills harmful microorganisms in the environment, which is a long-standing disinfection method. Generally, the thoroughness of killing microorganisms is limited by the combined effect of sterilization time and sterilization temperature. The higher the temperature, the shorter the sterilization time. When the flame is used, the temperature in the flame zone is as high as hundreds to thousands of degrees centigrade, and various viruses, bacteria, mold, parasitic ova and the like on the surface of an article can be instantaneously burnt and killed. The direct use of flame to kill microbe is thorough and quick, but has been used only for the disinfection of hard material surfaces such as metal instruments (such as needles), glassware (such as test tube mouths), etc. The invention uses the flame for killing the virus on the outer surface of the corrugated paper package of the cold-chain article for the first time, and is provided by fully knowing the virus killing requirement of the outer package of the cold-chain article and mastering the flame killing principle and the related thermodynamic mechanism. The key point of the invention is that the high-temperature flame is utilized, and the flame and the time for the flame to stay on the outer surface of the cold chain article corrugated paper package are controlled to maintain the high-temperature environmental conditions on the outer surface of the cold chain article corrugated paper package and nearby the outer surface of the cold chain article corrugated paper package, so that the virus attached to the outer surface can be killed, the outer surface of the corrugated paper package is not damaged, and the cold chain article corrugated paper package is in a critical state.

When the flame disinfection device is used, combustible gas flames such as butane and the like sprayed from the flame spray gun array form a closely woven flame curtain net. When the cold chain article to be killed and removed moving along with the conveying device passes through the flame spray gun array, all pathogenic microorganisms including viruses on the surface of the corrugated paper outer package of the cold chain article are burnt and killed by flame, and meanwhile, the outer package of the article and the article are not damaged due to the short action time of the flame, so that the killing of the dead angle-free surface of the outer package of the article can be realized on the premise of protecting the safety of the article, and the risks of carrying and virus infection of the cold chain article can be avoided or reduced.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and the detailed description;

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the cross section and axial temperature t distribution of a cold chain article at the moment of flame ignition;

FIG. 3 is a simplified top view of the present invention.

Detailed Description

As shown in fig. 1 to 3, the present invention relates to an assembly line flame disinfection apparatus, which includes a conveyor 1 and a flame spray gun array, wherein the flame spray gun array includes an annular gas distribution pipe 2, the gas distribution pipe 2 surrounds the outside of the conveyor 1, a plurality of spray guns 3 are connected to the pipe wall of the gas distribution pipe 2 at intervals, the flame spraying direction of each spray gun 3 points to the conveyor 1, and the gas inlet of the gas distribution pipe 2 is connected to a gas source; the flames emitted from the respective lances 3 form a dense-woven flame curtain net.

The gas source includes gas jar 4 and gas-supply pipe 5, the gas outlet of gas jar 4 is connected to the air inlet of gas distributing pipe 2 through gas-supply pipe 5, be connected with pressure control valve 6 on the gas-supply pipe 5. An air flow valve (not shown) is connected to each lance 3. The flame size and length of each spray gun 3 can be adjusted by a gas pressure valve arranged in a gas pipeline and an air flow valve on the spray gun 3. The gas (butane gas) is ignited by an electronic igniter, typically a continuous jet, and can be ignited or turned off manually or automatically. Under a certain gas pressure (< 1.5 MPa), the sizes and the lengths of flames sprayed by the spray guns 3 are equivalent to each other by adjusting the air flow valves of the spray guns 3. Typically the outer flame has a transverse width of about 6 cm and a length extending up to 45 cm. The gas distribution pipe 2 is provided with a certain number of spray guns 3 which can be arranged according to a linear array or an area array, the number of the spray guns 3 depends on the size of the gas distribution pipe 2 and the size of the articles to be killed, and the distance between two adjacent spray guns 3 is generally set between 3 cm and 6 cm. If the circumference of the cross section of the object is 150 cm, 40 to 50 spray guns 3 can be installed if the circumference of the corresponding annular array is about 250 cm, and the flames emitted by the spray guns 3 form a dense woven flame curtain net.

The conveying device 1 consists of two conveying belts arranged at intervals, and the fuel gas distribution pipe 2 is positioned in an interval space between the two conveying belts. Of course, the conveyor 1 may also be a roller conveyor belt, and the gas distribution pipe 2 is located between two adjacent rollers. The plane of the gas distribution pipe 2 is generally perpendicular to the conveying direction of the conveying device 1, and the conveying device 1, the spray gun 3, the gas distribution pipe 2, the gas pipe 5 and other components need to meet the requirements of high temperature resistance, fire protection and the like, and can work at the cold chain ambient temperature of below 18 ℃. Multiple arrays of flame spray guns may also be provided in the conveyor 1 when items to be killed are covered with a thin layer of ice or to increase the killing time, e.g. to increase the transport speed of the conveyor 1.

The gas distribution pipe 2 is a rectangular, circular or window frame structure with an unlimited shape, and can be a continuous closed ring structure or a non-continuous ring structure determined according to the specific shape of the object to be killed, taking a rectangular window frame structure as an example, and the upper, lower, left, right, transverse and longitudinal frames can be separately and independently arranged. For a rectangular gas distribution pipe 2, the flame spraying directions of the upper and lower horizontal frame upper spray guns 3 are staggered by a small included angle when pointing to the conveying device 1; the flame spraying direction of the spray guns 3 on the left and right longitudinal frames of the conveyor is directed to the conveyor 1 and is orthogonal to the moving direction of the conveyor 1.

When the placement direction of the articles to be sterilized is turned, all surfaces in the vertical direction of the articles to be sterilized simultaneously meet the flame inclination angle of 30-90 degrees and penetrate through the flame spray gun array. If the article is a regular cuboid, the projection angle of the pyramid in the advancing direction of the article is pointed to the moving direction of the conveyor belt under the condition of no turning, as shown in fig. 3, so that the whole surface of the article is ensured to be free of dead angles and killed by flame.

Cold chain goods are typically stored and transported below-18 ℃. The cold chain articles may have different packaging forms, shapes, volumes and materials. The invention relates to a cold chain article packaging form, in particular to a common corrugated case, the material and the structure of which conform to the national standard GB 6543-86. Under the condition of a cold chain, the temperature of cold chain articles and an outer packaging corrugated case is below 18 ℃ below zero, and a few thin ice layers are probably covered on kraft paper on the outer surface of the corrugated case. The microorganisms such as viruses can be attached to corrugated cases or hidden in the ice layer with extremely thin kraft paper on the outer surface, and the thin ice is the reason why the methods such as chemical reagent sterilization, ultraviolet sterilization, ozone fumigation sterilization and the like are difficult to thoroughly kill the viruses.

Corrugated paper itself is a poor conductor of heat and does not transfer heat easily, which is the reason why the contents of the corrugated paper container are not substantially affected by external temperature fluctuations.

As is well known, the ignition point of paper is related to the material and process for making the paper, and the ignition point of general paper is 130-255 ℃. The burning test was carried out at room temperature 20 ℃ and with the surface dried and under ordinary heat dissipation conditions using a flame spray gun 3 model KDL 993. When the external flame temperature is observed to be 1300 ℃ for many times, the flame gun is used for roasting the kraft paper on the outer surface of the corrugated paper vertically within 3 seconds from the distance of 25 cm, the temperature of the roasting part is measured to be about 210 ℃ by using a Victor 303B type infrared thermometer after the flame is removed, and therefore, the burning point of the kraft paper on the outer surface of the corrugated paper is preliminarily judged to be over 200 ℃. When the accumulated flame baking time reaches 5 seconds, the surface of the corrugated paper is carbonized and blackened, and flame appears at the carbonized and blackened position after 7 seconds. And (4) test conclusion: the kraft paper on the outer surface of the corrugated paper can resist kilo-degree flame burning for 2-5 seconds, and the kraft paper can restore to the original shape even if the surface temperature of the kraft paper exceeds 200 ℃.

When the cold chain article packaged by the corrugated case with dry appearance is located on the conveying device 1 according to the orientation shown in fig. 1, the moving speed of the conveying device 1 is set to be 0.5 m/s, the corresponding flame traveling width is 0.10-0.20 m, and the average duration of flame burning on the surface of the corrugated case outer package is 0.20-0.40 s. Experiments show that the label paper adhered on the surface of kraft paper of the corrugated case is carbonized and blackened, but the kraft paper part is not changed by naked eye observation; the burned part of the kraft paper after passing through the fire is immediately measured by an infrared thermometer to reach more than 180 ℃. Although the surface temperature of the outer kraft paper of the corrugated case is controlled to be about 200 ℃, the space near the outer surface of the outer kraft paper of the corrugated case is covered in the outer flame of the flame, and obviously the virus will be completely immersed in the flame at the other side where the virus is attached to the surface of the corrugated paper. FIG. 2 shows a cross section and a flame axial temperature distribution schematic diagram of a cold chain article at the moment of flame ignition. Wherein, in the left side drawing (a), 01 is a flame nozzle, 02 is flame, 03 is a virus layer attached to the outer surface of the corrugated paper package of the article, 04 is a corrugated paper package layer of the article, and 05 is the article; the right graph (b) shows the temperature t distribution along the flame axial centerline y axis (i.e., the dashed line y 'O and the extended line in the left graph) from the inside (y') of the article itself 05 through the outer cover 04, the virus layer 03 (O), and the flame 02 to the flame ports 01. In fig. 2 it is shown that the flame only creates high temperature zones in the space near and above the outer surface of the corrugated paper package of the article. The temperature distribution in the thickness range of microorganisms such as viruses shows that the temperature rapidly rises from over 200 ℃ on the surface of corrugated paper (kraft paper) to 800 to 1200 ℃ in the flame. It is reasonable to assume that the temperature of the virus on the side where it attaches to the surface of the corrugated board is about 200 ℃ higher (close to the fire point of kraft paper on the surface of the corrugated board) than the temperature of the surface of the corrugated board; the other side of the virus is completely immersed in the flame, the temperature of the virus can reach 800-1200 ℃, and the virus is instantly killed by the ash flying smoke. Therefore, the flame can kill the virus carried on the surface of the article effectively without damaging the outer package of the article and the article.

The rectangular annular flame spray gun array is described above by way of example with reference to the accompanying drawings, but the invention is not limited to the above-described embodiments, which are illustrative and not limiting of the invention, and it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.