Animal carcass harmless treatment wetting machine

Abstract

The utility model provides an animal carcass harmless treatment humidifying machine which comprises a conveying part, a treatment part and a separation part, the treatment part comprises a first humidifying assembly and a second humidifying assembly, the conveying part comprises a main path and a branch path branched at the tail end of the main path, the branch path is communicated with a feeding port of the first humidifying assembly and a feeding port of the second humidifying assembly, and the separation part is communicated with the conveying part. The main path is provided with a weight detection part, a small cutting knife set is arranged in the first humidifying assembly, a primary cutting knife set and a fine cutting knife set arranged below the primary cutting knife set are arranged in the second humidifying assembly, and a discharging port of the first humidifying assembly and a discharging port of the second humidifying assembly communicate with the separating part. Animal carcasses are detected through the weight detection part, classified treatment is carried out according to different weights, the treatment efficiency is improved through two lines, the phenomenon that long waiting is needed when large animals or animals with large weights are treated is avoided, different treatments are carried out on the animals with different weights, and the treatment efficiency is improved. And the treatment effect and efficiency are further improved.

Description

Technical Field

[0001] This application relates to the technical field of animal carcass processing equipment, specifically to a humidifier for the harmless treatment of animal carcasses. Background Technology

[0002] In the process of animal farming, animals often die due to disease. If these dead animals are not treated in time, they may spread the disease to other animals, causing large-scale deaths of farmed animals. This not only affects the overall farming efficiency but also harms the health of the animals.

[0003] To address this situation, dead animals are typically disposed of by incineration or burial. However, these traditional methods are not only ineffective but also environmentally damaging. Therefore, humidification machines have emerged to treat animal carcasses. Since the humidification process is conducted in a sealed environment, it has less environmental impact. The high-temperature, high-pressure environment can kill viruses, bacteria, and parasites to the greatest extent, interrupting the disease transmission chain and improving the treatment effect. Compared to traditional incineration, humidification emits less waste gas, consumes less energy, and significantly reduces treatment costs.

[0004] However, due to the wide variety of animal species raised, the humidification time required for larger farmed animals, such as cattle, sheep, pigs, and horses, is inevitably longer than that for smaller or lighter farmed animals like chickens, ducks, and geese. Furthermore, these larger or heavier animals often need to be cut up to improve humidification efficiency. If the humidification process is carried out on the larger animals first, it will inevitably affect the efficiency of subsequent processing. Existing humidification machines often do not classify and process animals of different sizes and weights, resulting in poor treatment efficiency for animal carcasses. Moreover, the wastewater and waste generated after processing still have some value after further processing and treatment. Therefore, these wastes should also be temporarily stored and treated.

[0005] Therefore, existing technologies need further improvement and enhancement. Utility Model Content

[0006] This application provides a humidifier for the harmless treatment of animal carcasses, which solves the problems of existing humidifiers, such as difficulty in sorting, low processing efficiency, poor processing effect, and low recycling rate.

[0007] The technical solution adopted in this application is as follows:

[0008] This application provides a humidification machine for the harmless treatment of animal carcasses. The humidification machine includes a transport section, a processing section, and a separation section. The processing section includes a first humidification component and a second humidification component. The transport section includes a main road and a branch road that branches off at the end of the main road. The branch road connects to the feed inlets of the first humidification component and the second humidification component. The main road is equipped with a weight detection device. The first humidification component is equipped with a small cutting blade assembly. The second humidification component is equipped with a preliminary cutting blade assembly and a fine cutting blade assembly located below the preliminary cutting blade assembly. The discharge ports of the first humidification component and the second humidification component are connected to the separation section.

[0009] In a preferred embodiment of this application, the weight detection component has a weight setting value. When the weight of the animal carcass is less than the weight setting value, the animal carcass is conveyed to the first humidification component. When the weight of the animal carcass is not less than the weight setting value, the animal carcass is conveyed to the second humidification component.

[0010] In a preferred embodiment of this application, the first humidification component includes a humidification tank, a small cutting blade assembly disposed below the feed inlet of the humidification tank, and a cooking chamber disposed at the bottom of the humidification tank. A stirring mechanism is disposed in the cooking chamber, and a discharge outlet is disposed at the bottom of the cooking chamber.

[0011] In a preferred embodiment of this application, the first humidification component further includes a steam nozzle disposed on the inner side wall of the cooking chamber and a steam generator disposed on the outer side wall of the cooking chamber, the steam generator being connected to the nozzle.

[0012] In a preferred embodiment of this application, the small cutting blade group, the preliminary cutting blade group, and the fine cutting blade group are all provided with multiple circular cutting blades and a rotating shaft. The circular cutting blades of the small cutting blade group have the same diameter, while the circular cutting blades of the preliminary cutting blade group have a larger diameter than those of the fine cutting blade group.

[0013] In a preferred embodiment of this application, the rotation axes of the preliminary cutting blade assembly and the fine cutting blade assembly are perpendicular to each other in the horizontal direction when viewed from above.

[0014] In a preferred embodiment of this application, the cooking chamber is provided with an on / off door to open or close the discharge port, and a connecting pipe and an on / off valve are provided between the discharge port and the separation section.

[0015] In a preferred embodiment of this application, a multi-stage filter screen is provided inside the separation section. The multi-stage filter screen is inclined. A storage groove is provided on the side wall of the separation section. The lower end of the inclined multi-stage filter screen is connected to the storage groove. The storage groove is provided with a partition door.

[0016] In a preferred embodiment of this application, a turntable is provided at the connection between the main road and the branch road. The turntable is rotatably connected to the bottom wall surface of the main road to switch the transport path of the animal carcass.

[0017] In a preferred embodiment of this application, a protective cover is attached to the surface of the main road and the branch roads, and the protective cover is made of transparent material.

[0018] Due to the adoption of the above technical solution, the technical effects achieved by this application are as follows:

[0019] This application provides a humidification machine for the harmless treatment of animal carcasses. By setting up a main path and branch paths, animal carcasses can be transported to a first humidification component and a second humidification component for processing. For the branching method, this application uses a weight detection device in the main path to detect the weight of the animal carcasses passing through the weight detection device and classify the animal carcasses according to their weight. This not only improves the processing efficiency by using two paths and avoids the long waiting time required for processing large or heavy animals, but also improves the processing effect and efficiency by treating animals of different weights differently. Furthermore, this application also includes a separation section to filter and temporarily collect the waste liquid and waste generated after humidification, which facilitates further fine processing of these wastes, improves the recycling effect of waste, and thus increases the benefits of humidification. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain this application and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the overall structure of a humidifier for the harmless treatment of animal carcasses provided in this application;

[0022] Figure 2 A side view of a humidifier for the harmless treatment of animal carcasses provided in this application;

[0023] Figure 3 This is a schematic diagram of the first humidification component of a humidification machine for the harmless treatment of animal carcasses provided in this application;

[0024] Figure 4 This is a schematic diagram of the second humidification component of a humidification machine for the harmless treatment of animal carcasses provided in this application;

[0025] Figure 5 A schematic diagram of the discharge port on / off gate structure of a humidifier for harmless treatment of animal carcasses provided in this application;

[0026] Figure 6 This is a schematic diagram of the separation section of a humidifier for the harmless treatment of animal carcasses provided in this application.

[0027] Figure label:

[0028] 1. Transportation Department; 11. Main Road; 12. Branch Road; 13. Weight Detection Item; 14. Turning Plate;

[0029] 2. Processing unit; 21. First humidification assembly; 211. Small cutting blade assembly; 22. Second humidification assembly; 221. Preliminary cutting blade assembly; 222. Fine cutting blade assembly; 23. Feed inlet; 24. Discharge outlet; 25. Humidification tank; 26. Cooking chamber; 261. Nozzle; 262. Steam generator; 27. Stirring mechanism; 28. On / off door;

[0030] 3. Separation section; 31. Connecting pipe; 32. On / off valve; 33. Multi-stage filter screen; 34. Storage tank; 35. Partition door. Detailed Implementation

[0031] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0033] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0036] like Figures 1 to 6 As shown, this application provides a humidification machine for the harmless treatment of animal carcasses. The humidification machine includes a transport section 1, a processing section 2, and a separation section 3. The processing section 2 includes a first humidification component 21 and a second humidification component 22. The transport section 1 includes a main road 11 and a branch road 12 that branches off at the end of the main road 11. The branch road 12 connects to the feed inlets 23 of the first humidification component 21 and the second humidification component 22. The main road 11 is equipped with a weight detection element 13. The first humidification component 21 is equipped with a small cutting blade group 211. The second humidification component 22 is equipped with a preliminary cutting blade group 221 and a fine cutting blade group 222 located below the preliminary cutting blade group 221. The discharge outlets 24 of the first humidification component 21 and the second humidification component 22 connect to the separation section 3.

[0037] Among them, such as Figure 1 and Figure 2 As shown, the overall structure of the transport section 1 presents a Y-shaped conveying line. In order to facilitate the efficiency of subsequent processing of animal carcasses, the transport section 1 can be set as an upward inclined structure, so that the animal carcasses are processed from top to bottom in the processing section 2; that is, the feed inlet 23 is set high, and the transport section 1 conveys upward.

[0038] To improve the conveying efficiency, both the main road 11 and the branch road 12 can be made of conveyor belts, with anti-slip protrusions on their surfaces to minimize the occurrence of animal carcasses falling off during transport. Of course, if the area for setting up the humidifier is sufficient, the distance between the main road 11 and the branch road 12 can be extended to reduce the slope and thus reduce the occurrence of animal carcasses falling off.

[0039] Furthermore, such as Figure 1As shown, a rotating plate 14 is provided at the connection between the main road 11 and the branch road 12 (e.g., at the end of the main road 11). The rotating plate 14 is rotatably connected to the bottom wall surface of the main road 11 to switch the transport path of the animal carcass. In an optional embodiment, the rotating plate 14 can be a vertically arranged baffle structure. The length of the rotating plate 14 should be able to block the branch road 12. For example, when transporting a lighter animal carcass, the rotating plate 14 rotates to a position facing the first humidification component 21. At this time, the rotating plate 14 blocks the branch road 12 leading to the second humidification component 22, thereby realizing the route switching. The rotation point can be set near the upper end of the rotating plate 14 to improve the effect of rotating to open and close the branch road 12.

[0040] Of course, in another embodiment, the rotating plate 14 can be a horizontal circular rotating plate 14. The surface of the circular rotating plate 14 is provided with a conveying channel that is adapted to the width of the branch road 12. When it is necessary to transport to the first humidification component 21 or the second humidification component 22, the rotating plate 14 only needs to be rotated so that the conveying channel is aligned with the adapted branch road 12, and the body can be transported to the first humidification component 21 or the second humidification component 22.

[0041] It should be noted that these two implementation methods are merely optional embodiments in this application. For the separate delivery of branch 12, various other methods can be used, such as using a lifting mechanism or a forward and reverse mechanism. This application does not make specific limitations or descriptions here.

[0042] In addition, to avoid the impact of animal carcasses on the working environment, protective covers can be installed on the surfaces of the main road 11 and the branch road 12. The protective covers are made of transparent material, which can not only reduce the emission of animal carcass odor during transportation, but also protect the animal carcasses to a certain extent and reduce the occurrence of animal carcasses falling off. The transparent material also makes it easy for users to observe the transportation of animal carcasses.

[0043] In a preferred embodiment of this application, the weight detection component 13 has a weight setting value. When the weight of the animal carcass is less than the weight setting value, the animal carcass is transported to the first humidification component 21. When the weight of the animal carcass is not less than the weight setting value, the animal carcass is transported to the second humidification component 22.

[0044] For example, the weight setting can be set to 10kg. If the weight is greater than or equal to 10kg, it will be transported to the second humidification component 22. If the weight is less than 10kg, it can be transported to the first humidification component 21. Of course, this weight setting can be freely adjusted according to different needs to adapt to different work requirements.

[0045] For the weight detection component 13, it can be equipped with a detection box. The detection box is located at one section of the main road 11 and its length is set to be long enough as needed. After the animal carcass is transported to the detection box, it will pause for a period of time. The weight is detected by the weight sensor plate at the bottom of the detection box and the size detection component inside the detection box, so as to obtain a relatively accurate weight information. It is compared with the initially set weight setting value to determine whether it needs to be sent to the first humidification component 21 or the second humidification component 22. During this process, the information is transmitted to the turntable 14 through the line to control the rotation of the turntable 14.

[0046] It is understandable that the existing technology for weight detection component 13 is already quite mature, so the detection principle of weight detection component 13 will not be described in detail here.

[0047] As a preferred embodiment of this application, such as Figure 2 As shown, the first humidification component 21 includes a humidification tank 25, a small cutting blade assembly 211 disposed below the feed inlet 23 of the humidification tank 25, and a cooking chamber 26 disposed at the bottom of the humidification tank 25. A stirring mechanism 27 is disposed inside the cooking chamber 26, and a discharge port 24 is disposed at the bottom of the cooking chamber 26.

[0048] The first humidification component 21 also includes a steam nozzle 261 disposed on the inner side wall of the cooking chamber 26 and a steam generator 262 disposed on the outer side wall of the cooking chamber 26. The steam generator 262 is connected to the nozzle 261 so that after the animal carcass is cut, the steam generated in the steam generator 262 is delivered to the cooking chamber 26 through the nozzle 261 to humidify the animal carcass.

[0049] Furthermore, the stirring mechanism 27 can employ stirring blades and a stirring shaft. The stirring shaft drives the stirring blades to rotate forward or backward, thereby turning over the animal carcass residue during the humidification process, improving the contact effect between the animal carcass and steam, and thus improving the efficiency of the humidification treatment.

[0050] The cooking chamber 26 is equipped with a shut-off door 28 to open or close the discharge port 24. The shut-off door 28 can adopt a hinge-like structure and be opened or closed by electrical control. A sealing strip can be provided on the edge of the hinge structure to improve the sealing performance when closed. A connecting pipe 31 and a shut-off valve 32 are provided between the discharge port 24 and the separation section 3. After a period of humidification treatment, the shut-off door 28 and the shut-off valve 32 can be opened to transport the animal carcasses, which have been humidified into waste residue and waste liquid, to the connecting pipe 31 and enter the separation section 3 for temporary storage and separation. In order to improve the flow efficiency of the waste liquid, a pump structure can also be provided at the connecting pipe 31 to improve the flow efficiency.

[0051] In a preferred embodiment, the second humidification component 22 differs from the first humidification component 21 only in that it is provided with a preliminary cutting blade group 221 and a fine cutting blade group 222. To improve the cutting effect, the small cutting blade group 211, the preliminary cutting blade group 221, and the fine cutting blade group 222 are all provided with multiple circular cutting blades and rotating shafts to improve the cutting effect and facilitate the cutting of animal carcasses into smaller pieces for subsequent processing. The vertically arranged blade group can provide a more comprehensive cutting angle, thereby improving cutting efficiency. Furthermore, the cut animal carcass can expose the structure under the skin, which is more conducive to contact with steam.

[0052] Optionally, the circular cutting blades of the small cutting blade group 211 have the same diameter, while the circular cutting blades of the preliminary cutting blade group 221 have a larger diameter than the diameter of the fine cutting blade group 222. This allows for different processing of animal carcasses of different sizes and weights. The different diameter blade group settings can improve the cutting effect on large animal carcasses and increase work efficiency.

[0053] As a preferred embodiment of this application, such as Figure 3 As shown, the rotation axes of the preliminary cutting blade group 221 and the fine cutting blade group 222 are perpendicular to each other in the horizontal direction when viewed from above. In other words, the cutting angles and directions of the preliminary cutting blade group 221 and the fine cutting blade group 222 are different. This setting not only allows for cutting from different angles, which helps to decompose the material more thoroughly, but also reduces the blockage of material during the cutting process by using blades in different directions, improving the smoothness of the cutting process. This results in a more comprehensive and uniform cut, which is convenient for subsequent humidification treatment.

[0054] Of course, since small animal carcasses or animal carcasses with small weight are small in size, a single cut by the small cutting blade assembly 211 is sufficient. If the cutting effect is to be further improved, multiple blade assemblies at different angles can be set up for cutting, just like the second humidification assembly 22, as needed.

[0055] Compared to the existing technology of cutting and then transporting, the method of this application can not only be operated separately for animal carcasses of different sizes and weights, but also the cutting structure is inside the processing unit 2, which can reduce the splashing of blood and residue to the outside, optimize the user experience and the processing effect.

[0056] It is understandable that the first humidification component 21 and the second humidification component 22 must be equipped with an automatic gate structure at the feed inlet 23 to ensure the airtightness of the humidification process. To improve the overall automation level of the equipment, the humidifier can also be equipped with a control unit, which may include a control console, a central control chip, sensors, etc. The central control chip receives and processes various signals, such as weight signals, and processes and transmits the signals. The sensors can be photoelectric sensors, which can be evenly spaced in the transport section 1 to control the running rollers under the conveyor belt at each position. The automatic gate structure can be controlled automatically or manually. The central control chip can be controlled by a PLC or a microcontroller program. For the specific control methods and programs, there are already similar programs in the prior art, so they will not be described in detail here.

[0057] As a preferred embodiment of this application, such as Figure 5 and Figure 6 As shown, the separation section 3 is provided with a multi-stage filter screen 33, which is inclined. The side wall of the separation section 3 is provided with a storage groove 34, and the lower end of the inclined multi-stage filter screen 33 is connected to the storage groove 34. The storage groove 34 is provided with a partition door 35.

[0058] Specifically, the multi-stage filter screen 33 can adopt multiple filter screen structures arranged from top to bottom, with the mesh size gradually decreasing, thereby achieving multi-stage sieving to separate animal carcass residue of different particle sizes. Furthermore, by setting the multi-stage filter screen 33 at an angle, liquid can pass through the mesh and flow into the lower storage area. Some residue of different particle sizes can enter the collection tank 34 along the inclined multi-stage filter screen. Of course, the partition door 35 is an automatic or manual control structure and does not open during filtration to prevent a large amount of liquid from entering the collection tank 34.

[0059] For the liquid accumulated in the separation section 3, a certain degree of oil-water separation can be achieved by allowing it to settle and then discharged through the outlet of the separation section 3 for further processing; the same applies to the residue temporarily stored in the collection tank 34. After storing a certain amount, the residue can be collected and processed by removing the collection tank 34 or by opening a guide outlet at the collection tank 34.

[0060] In use, the animal carcass is first transported to the transport section 1 by the transport equipment. The carcass is then transported to the weight detection unit 13 via the main road 11. The weight is used to determine whether the carcass flows into the first humidification component 21 or the second humidification component 22. After flowing into the first humidification component 21 or the second humidification component 22, the carcass is cut to improve the processing efficiency. When the amount of carcass input is sufficient or when humidification is required, the automatic doors of the first humidification component 21 and the second humidification component 22 are closed to allow humidification through the cooking chamber 26. After humidification is completed, the residue and waste liquid enter the separation section 3 through the discharge port 24 and the connecting pipe 31 for preliminary separation of the residue and liquid and temporary storage.

[0061] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0062] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0063] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An animal carcass wet-rendering machine characterized by, The wetting machine comprises a conveying part (1), a processing part (2) and a separating part (3), the processing part (2) comprises a first wetting assembly (21) and a second wetting assembly (22), the conveying part (1) comprises a main path (11) and a branch path (12) which is branched at the end of the main path (11), the branch path (12) is communicated with the feed port (23) of the first wetting assembly (21) and the second wetting assembly (22), the main path (11) is provided with a weight detection member (13), the first wetting assembly (21) is internally provided with a small cutting knife group (211), the second wetting assembly (22) is internally provided with a preliminary cutting knife group (221) and a fine cutting knife group (222) which is arranged below the preliminary cutting knife group (221), the discharge port (24) of the first wetting assembly (21) and the second wetting assembly (22) is communicated with the separating part (3).

2. An animal carcass wet-rendering machine as claimed in claim 1, characterized in that The weight detection member (13) has a weight setting value, the animal carcass whose weight is less than the weight setting value is conveyed to the first wetting assembly (21), and the animal carcass whose weight is not less than the weight setting value is conveyed to the second wetting assembly (22).

3. An animal carcass wet-rendering machine as claimed in claim 2, wherein, The first wetting assembly (21) comprises a wetting tank body (25), the small cutting knife group (211) arranged below the feed port (23) of the wetting tank body (25) and a cooking chamber (26) arranged at the bottom of the wetting tank body (25), the cooking chamber (26) is internally provided with a stirring mechanism (27), and the cooking chamber (26) is provided with the discharge port (24) at the bottom.

4. An animal carcass wet-rendering machine as claimed in claim 3, wherein, The first wetting assembly (21) further comprises a steam nozzle (261) arranged on the inner side wall of the cooking chamber (26) and a steam generator (262) arranged on the outer side wall of the cooking chamber (26), and the steam generator (262) is communicated with the nozzle (261).

5. An animal carcass wet-rendering machine as claimed in claim 4, wherein, The small cutting knife group (211), the preliminary cutting knife group (221) and the fine cutting knife group (222) are all provided with a plurality of circular cutting knives and rotating shafts, the diameters of the circular cutting knives of the small cutting knife group (211) are the same, the diameters of the circular cutting knives of the preliminary cutting knife group (221) are greater than the diameters of the fine cutting knife group (222).

6. An animal carcass wet-rendering machine as claimed in claim 5, wherein, The rotating shafts of the preliminary cutting knife group (221) and the fine cutting knife group (222) are perpendicular in the horizontal direction in the top view state.

7. An animal carcass wet-rendering machine as claimed in claim 6, characterised in that, The cooking chamber (26) is internally provided with an on-off door (28) for opening or closing the discharge port (24), and a communication pipe (31) and an on-off valve (32) are arranged between the discharge port (24) and the separating part (3).

8. An animal carcass wet-rendering machine as claimed in claim 7, characterized in that The separating part (3) is internally provided with a plurality of filtering screens (33), the filtering screens (33) are arranged in an inclined manner, a receiving groove (34) is arranged on the side wall of the separating part (3), the low end of the inclined filtering screens (33) is communicated with the receiving groove (34), and the receiving groove (34) is provided with a partition door (35).

9. An animal carcass wet-rendering machine as claimed in claim 1, wherein, The connection part of the main path (11) and the branch path (12) is provided with a rotating plate (14), which is rotatably connected with the bottom wall surface of the main path (11) to switch the conveying path of the animal carcass.

10. An animal carcass wet-rendering machine as claimed in claim 9, characterized in that The surface of the main path (11) and the branch path (12) is provided with a protective cover, which is made of transparent material.

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