Corrosion device for macrostructure inspection

Abstract

The utility model belongs to the technical field of macrostructure detection, and particularly discloses a corrosion device for macrostructure inspection, which is characterized in that a sample holder for placing a sample is arranged on a cover body. When the sample is corroded, the cover body covers the first opening of the corrosion container, and the sample on the sample holder is immersed in the corrosive liquid. In the process that the cover body is buckled on the first opening, the sample is slowly immersed in the corrosive liquid along with the sample holder, so that the problem of splashing of the corrosive liquid is avoided, and after the cover body is buckled on the first opening of the corrosive container, the corrosive container is closed to avoid volatilization of the corrosive liquid. When the sample is cleaned, the cover body covers the second opening of the cleaning container, the sample is immersed in the cleaning liquid, and the sample is cleaned through the cleaning assembly. In the cleaning process of the sample, the cover body blocks the second opening, so that the cleaning liquid is prevented from splashing, and sample personnel are protected from being scalded by the cleaning liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of low-power structure inspection, in particular to a corrosion device for low-power structure inspection. Background Art

[0002] Macrostructure inspection is a method of observing the macroscopic structure of materials under low magnification. It is one of the important means of metallographic inspection and analysis, and has important reference significance for analyzing the composition, structure and performance of metals, alloys and steels. Macrostructure can be used for qualitative and quantitative analysis of defects in metal materials, such as porosity, segregation, white spots and macroscopic defects such as metal processing streamlines, which can all be inspected using macrostructure. The scope of macrostructure inspection mainly includes steel alloys, aluminum alloys, magnesium alloys, titanium alloys, high-temperature alloys, forgings, continuous castings, die castings and other metal materials and products.

[0003] Generally speaking, the main methods of low-magnification tissue inspection include hot acid corrosion, cold acid and cold alkali corrosion, and electrolytic corrosion. Various chemical corrosive agents are inevitably needed in the process of low-magnification tissue inspection, so the inspection process is very dangerous. For example, in the hot acid corrosion process, the acid needs to be heated to a certain temperature, and then the sample is placed in the acid for corrosion, and then the sample is taken out of the acid after corrosion. Although the cold acid and cold alkali corrosion process does not require heating the corrosive liquid, it is also necessary to place the sample in the corrosive liquid and take the sample out of the corrosive liquid. The process of placing and removing the sample in the acid or corrosive liquid is the most dangerous part of low-magnification tissue inspection. Problems such as gas volatilization and splashing of the corrosive liquid often occur, which poses a great safety hazard to the test personnel.

[0004] In addition, after the sample is corroded, it is necessary to use running hot water to clean the surface of the sample. Generally, the test personnel hold a scouring pad dipped in hot water to wipe the surface of the sample, which poses a safety hazard of being scalded by hot water.

[0005] Therefore, there is an urgent need for a corrosion device for low-magnification structural inspection to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a corrosion device for low-magnification tissue inspection, which can avoid the volatilization and splashing of the corrosion liquid during the corrosion process, and at the same time avoid the test personnel from being scalded during the process of cleaning the sample, and has high safety.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a corrosion device for low-power structure inspection, comprising:

[0009] A cover body, wherein a sample rack is provided on the cover body, and the sample rack is used to place the sample;

[0010] A corrosion container, wherein a first chamber is formed inside the corrosion container, and the first chamber is used to store the corrosion liquid. A first opening is provided on one side of the corrosion container, and the first opening is communicated with the first chamber. The cover body can be covered on the first opening, and the sample rack is located in the first chamber.

[0011] A cleaning container, wherein a second chamber is formed inside the cleaning container, and the second chamber is used to store cleaning liquid. A second opening is provided on one side of the cleaning container, and the second opening is communicated with the second chamber. The cover body can cover the second opening, and the sample rack is located in the second chamber.

[0012] A cleaning component is arranged on the side wall of the cleaning container, and at least a part of the cleaning component is located in the second chamber, and the cleaning component is used to clean the sample.

[0013] Optionally, the sample rack includes a connecting rod and a first supporting frame, one end of the connecting rod is connected to the cover body, and the other end of the connecting rod is connected to the first supporting frame, and the first supporting frame is used to place the sample.

[0014] Optionally, a sealing ring is provided on one side of the cover body on which the sample holder is provided, and the sealing ring is used to seal the corrosion container and the cover body; or the sealing ring is used to seal the cleaning container and the cover body.

[0015] Optionally, a first handle is provided on the cover body, and a second handle is provided on the outer side wall of the corrosion container.

[0016] Optionally, a second support frame is provided at the bottom of the cleaning container, and the second support frame is used to lift the cleaning container.

[0017] Optionally, the second support frame includes a second support ring and a second support rib, and two ends of the second support rib are respectively connected to the second support ring and the cleaning container.

[0018] Optionally, the cleaning assembly includes a fixed rod and a cleaning part, the cleaning part is fixed on the circumference of the fixed rod, a first through hole and a second through hole are provided on the side wall of the cleaning container, one end of the fixed rod is passed through the first through hole, and the other end of the fixed rod is passed through the second through hole.

[0019] Optionally, a fixing hole is provided on one side of the fixing rod passing through the first through hole, and the cleaning assembly further comprises a locking member, the locking member is installed in the fixing hole, and the locking member fixes the fixing rod to the side wall of the cleaning container;

[0020] And / or, the locking member includes a bolt and a nut, and one end of the bolt passes through the fixing hole and then engages with the nut thread.

[0021] Optionally, a rotating handle is provided on one side of the fixing rod passing through the second through hole.

[0022] Optionally, the cleaning part is a cleaning brush or a cleaning cloth.

[0023] The beneficial effects of the utility model are:

[0024] The utility model provides a corrosion device for low-magnification tissue inspection, comprising a cover body, a corrosion container, a cleaning container and a cleaning component. The cover body is provided with a sample rack, and the sample rack can be used to place the sample. When the sample needs to be corroded, the cover body can be covered on the first opening, and the sample rack is located in the first chamber. The sample on the sample rack is immersed in the corrosive liquid, and the sample can be corroded. Since the sample rack is fixed to the cover body, in the process of the cover body being buckled on the first opening, the sample can be slowly immersed in the corrosive liquid following the sample rack, thereby avoiding the problem of splashing the corrosive liquid caused when the sample is directly thrown into the corrosion container, and after the cover body is buckled on the first opening of the corrosion container, the first chamber is closed, which can avoid the volatilization of the corrosive liquid and ensure the safety of the test personnel. When cleaning the sample, the cover body is covered on the second opening of the cleaning container, and the sample is moved to the second chamber of the cleaning container by using the sample rack on the cover body. The sample is immersed in the cleaning liquid, and the sample can be cleaned by the cleaning component. In this process, the test personnel do not need to touch the sample, and only need to carry the cover body. In addition, during the cleaning process of the sample, because the cover body blocks the second opening, the cleaning liquid can be prevented from splashing when the sample enters the cleaning liquid and when the cleaning component cleans the sample, thereby protecting the sample personnel from being scalded by the cleaning liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the assembled cover body and the corrosion container provided in the embodiment of the utility model;

[0026] Figure 2 is a cross-sectional view of the assembled cover and corrosion container provided in the embodiment of the utility model;

[0027] Figure 3 It is a schematic diagram of the structure of the corrosion container provided in the embodiment of the utility model;

[0028] Figure 4 It is a structural schematic diagram of a cover body provided in an embodiment of the utility model;

[0029] Figure 5 It is a structural schematic diagram of a cleaning container provided in an embodiment of the utility model;

[0030] Figure 6 It is a schematic diagram of the structure of the cleaning assembly provided in an embodiment of the utility model;

[0031] Figure 7 It is a left side view of the assembled cover body and cleaning container provided in the embodiment of the utility model;

[0032] Figure 8 yes Figure 7 A partial enlarged view of the middle A;

[0033] Fig. 9 yes Figure 7 Cross-sectional view of the BB section.

[0034] In the figure:

[0035] 100, cover body; 110, sample rack; 111, connecting rod; 112, first support frame; 1121, first support ring; 1122, first support rib; 120, first handle;

[0036] 200, corrosion container; 201, first chamber; 202, first opening; 210, second handle;

[0037] 300, cleaning container; 301, second chamber; 302, second opening; 310, second support frame; 311, second support ring; 312, second support rib;

[0038] 400, cleaning assembly; 410, fixing rod; 411, fixing hole; 420, cleaning part; 430, locking piece; 431, bolt; 432, nut; 440, rotating handle. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] This embodiment provides a low-magnification microstructure inspection etching device, which is mainly suitable for hot acid etching method and cold acid and cold alkali etching method.

[0044] like Figure 1-Figure 4As shown, the corrosion device for low-magnification tissue inspection includes a cover 100, a corrosion container 200, a cleaning container 300 and a cleaning assembly 400. The cover 100 is provided with a sample rack 110, and the sample rack 110 can be used to place the sample to be corroded. The interior of the corrosion container 200 forms a first chamber 201, and the first chamber 201 stores a corrosive liquid. A first opening 202 is provided on one side of the corrosion container 200, and the first opening 202 is connected to the first chamber 201. When the sample needs to be corroded, the cover 100 can be covered on the first opening 202, and at this time, the sample rack 110 is located in the first chamber 201, and the sample on the sample rack 110 is immersed in the corrosive liquid, so as to facilitate the corrosion of the sample. Since the sample holder 110 is fixed to the cover 100, when the cover 100 is buckled in the first opening 202, the sample can follow the sample holder 110 and slowly be immersed in the corrosive liquid, thereby avoiding the problem of splashing the corrosive liquid when the sample is directly thrown into the corrosion container 200, and after the cover 100 is buckled in the first opening 202 of the corrosion container 200, the first chamber 201 is closed, which can avoid the volatilization of the corrosive liquid, ensure the safety of the test personnel, and reduce safety hazards. Exemplarily, the type of corrosive liquid can be selected according to the corrosion method adopted. For example, when the hot acid corrosion method is used to corrode the sample, the corrosive liquid is an acid solution, and the corrosion container 200 needs to be heated. When the cold acid and cold alkali corrosion method is used, the corrosive liquid can be a mixture of nitric acid and hydrogen peroxide, and the corrosion container 200 does not need to be heated.

[0045] See also Figure 4-Figure 9 , a second chamber 301 is formed inside the cleaning container 300, and a cleaning liquid can be stored in the second chamber 301. A second opening 302 is provided on one side of the cleaning container 300, and the second opening 302 is communicated with the second chamber 301. The cleaning assembly 400 is arranged on the side wall of the cleaning container 300, and at least part of the cleaning assembly 400 is located in the second chamber 301. After the sample is corroded, the cover 100 can be covered at the second opening 302 of the cleaning container 300, so that the sample can be moved to the second chamber 301 of the cleaning container 300 by using the sample holder 110 on the cover 100. In the second chamber 301, the sample is immersed in the cleaning liquid, and the sample can be cleaned by the cleaning assembly 400. Optionally, the cleaning liquid can be hot water. In this process, the test personnel do not need to touch the sample, and only need to carry the cover 100. In addition, during the cleaning process of the sample, because the cover 100 blocks the second opening 302, the cleaning liquid can be prevented from splashing when the sample enters the cleaning liquid and when the cleaning assembly 400 cleans the sample, thereby protecting the sample personnel from being scalded by the cleaning liquid.

[0046] Continue to see Figure 3The sample rack 110 includes a connecting rod 111 and a first support rack 112. One end of the connecting rod 111 is connected to the cover body 100, and the other end of the connecting rod 111 is connected to the first support rack 112. The first support rack 112 is used to place the sample.

[0047] As an optional solution, the corrosion container 200 and the cleaning container 300 are both cylindrical, and a plurality of connecting rods 111 are provided. The first support frame 112 includes a first support ring 1121 and a plurality of first support ribs 1122, wherein one end of the plurality of connecting rods 111 is connected to the cover body 100, and the other end of the plurality of connecting rods 111 is connected to the first support ring 1121. Both ends of each first support rib 1122 are connected to the first support ring 1121, and the plurality of first support ribs 1122 intersect at the center of the first support ring 1121. Optionally, both ends of the first support rib 1122 may also be provided at the connection between the first support ring 1121 and the connecting rod 111.

[0048] For example, in this embodiment, four connecting rods 111 are provided, and three first supporting ribs 1122 are provided. Of course, the number of the connecting rods 111 and the number of the first supporting ribs 1122 are only for illustration, and in other embodiments, the connecting rods 111 and the first supporting ribs 1122 may be provided in other numbers.

[0049] In other embodiments, the connection between the plurality of first support ribs 1122 and the first support ring 1121 may also be arranged in other ways, such as arranging the plurality of first support ribs 1122 in a crisscross pattern to form a grid structure. The number of the first support ribs 1122 may be adjusted according to the density of the grid.

[0050] Furthermore, a sealing ring is provided on one side of the cover body 100 where the sample holder 110 is provided, and the sealing ring can seal the gap between the corrosion container 200 and the cover body 100, and the sealing ring can seal the gap between the cleaning container 300 and the cover body 100, thereby improving the reliability of the corrosion device for low-magnification tissue inspection in preventing the corrosion liquid or cleaning liquid from splashing, and further ensuring the safety of the test personnel.

[0051] Optionally, a first handle 120 is provided on the end surface of the cover body 100 facing away from the sample holder 110. The first handle 120 is U-shaped, and both ends of the first handle 120 are connected to the cover body 100. By providing the first handle 120, it is convenient for the test personnel to take or carry the cover body 100, and the operation is more convenient. The firmness and reliability of the test personnel when holding the cover body 100 are higher, and the cover body 100 is prevented from slipping from the test personnel's hands and causing danger. Of course, in other embodiments, the first handle 120 can also be a long strip, and the first handle 120 is provided on one side of the cover body 100 and along the radial direction of the cover body 100 ( Figure 2 The X-axis direction shown in FIG. 1 extends outward.

[0052] Continue to see Figure 1-Figure 3 In this embodiment, a second handle 210 is provided on the outer wall of the corrosion container 200. The second handle 210 is in the shape of a long strip. The second handle 210 is provided on the outer wall of the corrosion container 200 and extends along the radial direction of the corrosion container 200 ( Figure 2 The second handle 210 extends outwardly in the X-axis direction shown in FIG. 2 . By providing the second handle 210, it is convenient for the test personnel to take or carry the corrosion container 200, and the operation is more convenient. The test personnel can hold the corrosion container 200 with higher firmness and reliability, and the corrosion container 200 can be prevented from slipping from the test personnel's hands and causing the corrosion liquid to spill and cause danger. Of course, in other embodiments, the second handle 210 can also be U-shaped, and both ends of the second handle 210 are connected to the outer wall of the corrosion container 200.

[0053] Continue to see Figure 5 , Figure 7 and Fig. 9 A second support frame 310 is provided at the bottom of the cleaning container 300, and the second support frame 310 is used to elevate the cleaning container 300. Optionally, the second support frame 310 includes a second support ring 311 and a plurality of second support ribs 312, and both ends of each second support rib 312 are respectively connected to the second support ring 311 and the cleaning container 300.

[0054] For example, in this embodiment, the number of the second support ribs 312 is three, and the diameter of the second support ring 311 is larger than the outer diameter of the cleaning container 300. The second support ribs 312 are axially spaced from the cleaning container 300 ( Figure 7 , Fig. 9 There is an angle between the second support ribs 312 and the cleaning container 300, so that the second support frame 310 has a higher supporting effect on the cleaning container 300, and the structure of the second support frame 310 is more stable and not easy to tip over, thereby preventing the test personnel from being scalded by hot water.

[0055] Continue to see Figure 6 , Figure 8 and Fig. 9 The cleaning assembly 400 includes a fixing rod 410 and a cleaning part 420. The cleaning part 420 is fixed to the circumference of the fixing rod 410. A first through hole and a second through hole are provided on the side wall of the cleaning container 300. One end of the fixing rod 410 is passed through the first through hole, and the other end of the fixing rod 410 is passed through the second through hole. Thus, the fixing rod 410 is supported by the side wall of the cleaning container 300, so that the cleaning part 420 can be suspended in the second chamber 301. The fixing rod 410 can rotate in the first through hole and the second through hole. The cleaning part 420 contacts the sample after passing through the sample holder 110, so that the sample can be wiped and cleaned by rotating the cleaning part 420.

[0056] Furthermore, a fixing hole 411 is provided on one side of the fixing rod 410 passing through the first through hole, and the cleaning assembly 400 further includes a locking member 430, which is installed in the fixing hole 411, and the fixing rod 410 is fixed to the side wall of the cleaning container 300 through the locking member 430. Exemplarily, the locking member 430 includes a bolt 431 and a nut 432, and one end of the bolt 431 passes through the fixing hole 411 and is threadedly engaged with the nut 432, so that the bolt 431 is fixed in the fixing hole 411, and the fixing hole 411 is rotated in the axial direction of the first through hole ( Fig. 9 The fixing rod 410 will not fall out of the first through hole (in the X-axis direction shown in FIG), ensuring that the fixing rod 410 is fixed to the side wall of the cleaning container 300. Of course, in other embodiments, the locking member 430 can be in other forms, for example, the locking member 430 can be a pin, and after the pin passes through the fixing hole 411, one end of the pin passing through the fixing hole 411 is bent, so that the pin is fixed in the fixing hole 411, and the fixing rod 410 is fixed in the axial direction (in the X-axis direction) of the first through hole. Fig. 9 The fixing rod 410 will not fall out of the first through hole (in the X-axis direction shown in FIG), thereby ensuring that the fixing rod 410 is fixed to the side wall of the cleaning container 300.

[0057] Optionally, a rotating handle 440 is provided on one side of the fixing rod 410 passing through the second through hole. By providing the rotating handle 440, it is convenient for the test personnel to rotate the fixing rod 410, and the operation is more convenient. Exemplarily, the rotating handle 440 can be set in a zigzag shape. Fig. 9 The two ends of the second through hole (in the X-axis direction shown in FIG) are respectively limited by the locking member 430 and the rotating handle 440 to ensure that the fixing rod 410 is stably mounted on the side wall of the cleaning container 300. Fig. 9 The fixing rod 410 will not fall out of the second through hole (in the X-axis direction shown in FIG. 1 ).

[0058] Furthermore, the cleaning part 420 can be a cleaning brush or a cleaning cloth. For example, in this embodiment, a cleaning brush can be selected, and after passing through the first support frame 112 of the sample rack 110, the cleaning brush can contact the sample placed on the first support frame 112. When the fixing rod 410 is rotated by rotating the handle 440, the cleaning brush rotates with the fixing rod 410, so that the cleaning brush passes over the surface of the sample, wipes and cleans the sample, and the cleaning effect is good.

[0059] In other embodiments, a water inlet is provided on the side wall of the cleaning container 300, and a water outlet is provided on the bottom wall of the cleaning container 300. The water inlet is connected to a source of hot water. After the hot water contacts the sample and the sample is cleaned using the cleaning component, the hot water can flow out from the water outlet, so that the hot water in the cleaning container 300 is a flowing water flow, which has a better cleaning effect on the sample.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A corrosion device for low-power structure inspection, characterized in that: include: A cover body (100), wherein a sample rack (110) is provided on the cover body (100), and the sample rack (110) is used to place a sample; A corrosion container (200), wherein a first chamber (201) is formed inside the corrosion container (200), and the first chamber (201) is used to store a corrosion liquid. A first opening (202) is provided on one side of the corrosion container (200), and the first opening (202) is communicated with the first chamber (201). The cover (100) can be covered on the first opening (202), and the sample rack (110) is located in the first chamber (201); A cleaning container (300), wherein a second chamber (301) is formed inside the cleaning container (300), and the second chamber (301) is used to store a cleaning solution. A second opening (302) is provided on one side of the cleaning container (300), and the second opening (302) is communicated with the second chamber (301). The cover (100) can be covered on the second opening (302), and the sample rack (110) is located in the second chamber (301); The cleaning component (400) is arranged on the side wall of the cleaning container (300), and at least a part of the cleaning component (400) is located in the second chamber (301). The cleaning component (400) is used to clean the sample.

2. The corrosion device for low-magnification structural inspection according to claim 1, characterized in that: The sample rack (110) comprises a connecting rod (111) and a first support frame (112); one end of the connecting rod (111) is connected to the cover body (100); the other end of the connecting rod (111) is connected to the first support frame (112); and the first support frame (112) is used to place the sample.

3. The corrosion device for low-magnification structural inspection according to claim 1, characterized in that: A sealing ring is provided on one side of the cover body (100) on which the sample rack (110) is provided, and the sealing ring is used to seal the corrosion container (200) and the cover body (100); or the sealing ring is used to seal the cleaning container (300) and the cover body (100).

4. The corrosion device for low-magnification structural inspection according to claim 1, characterized in that: The cover body (100) is provided with a first handle (120), and the outer side wall of the corrosion container (200) is provided with a second handle (210).

5. The corrosion device for low-magnification structural inspection according to claim 1, characterized in that: A second support frame (310) is provided at the bottom of the cleaning container (300), and the second support frame (310) is used to lift the cleaning container (300).

6. The corrosion device for low-magnification structural inspection according to claim 5, characterized in that: The second support frame (310) comprises a second support ring (311) and a second support rib (312), and two ends of the second support rib (312) are respectively connected to the second support ring (311) and the cleaning container (300).

7. The corrosion device for low-magnification structural inspection according to claim 1, characterized in that: The cleaning assembly (400) comprises a fixing rod (410) and a cleaning portion (420), wherein the cleaning portion (420) is fixed in the circumference of the fixing rod (410), a first through hole and a second through hole are provided on the side wall of the cleaning container (300), one end of the fixing rod (410) is passed through the first through hole, and the other end of the fixing rod (410) is passed through the second through hole.

8. The corrosion device for low-magnification structural inspection according to claim 7, characterized in that: A fixing hole (411) is provided on one side of the fixing rod (410) passing through the first through hole, and the cleaning assembly (400) further comprises a locking member (430), wherein the locking member (430) is installed in the fixing hole (411), and the locking member (430) fixes the fixing rod (410) to the side wall of the cleaning container (300); And / or, the locking member (430) includes a bolt (431) and a nut (432), and one end of the bolt (431) passes through the fixing hole (411) and is threadedly engaged with the nut (432).

9. The corrosion device for low-magnification structural inspection according to claim 7, characterized in that: A rotating handle (440) is provided on one side of the fixing rod (410) passing through the second through hole.

10. The corrosion device for low-magnification structural inspection according to claim 7, characterized in that: The cleaning part (420) is a cleaning brush or a cleaning cloth.

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