Corrosion resistance detection device for bridge steel structure

Abstract

The invention discloses a bridge steel structure corrosion resistance detection device, and relates to the technical field of steel structure corrosion resistance detection.The bridge steel structure corrosion resistance detection device comprises a corrosion barrel, the lower side of the corrosion barrel is fixedly connected with a base, the middle of a sealing cover is fixedly connected with an air inlet pipe, and the interior of the corrosion barrel communicates with the upper side of the sealing cover through the air inlet pipe; a placing frame is fixedly connected to the lower portion of the inner side wall of the corrosion barrel, a cleaning mechanism is arranged on the side wall of the corrosion barrel, a filtering mechanism is arranged on the lower side of the base, an exhaust pipe is fixedly connected to the right side of the lower portion of the base, and the interior of the corrosion barrel communicates with the lower side of the base through the exhaust pipe; by arranging the gas inlet pipe capable of supporting gas corrosion media to enter, corrosion gas can uniformly cover the surface of the steel structure, the effect of simulating gas corrosion conditions in the actual environment is achieved, and the device has the advantages of being high in practicability and capable of reducing the influence of products on the surface of the steel structure on experimental results.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure corrosion resistance detection, in particular to a bridge steel structure corrosion resistance detection device. Background Art

[0002] During long-term use, bridge steel structures are often exposed to various environmental factors, including humidity, temperature changes, chemicals, and biological contamination. These environmental factors can cause corrosion on the steel structure surface, which in turn affects its load-bearing capacity and service life. Therefore, accurately evaluating the corrosion resistance of bridge steel structures is crucial to ensuring the safety of bridges and extending their service life.

[0003] Existing metal corrosion test equipment usually uses standardized corrosive gas media for testing, but there are some shortcomings in simulating the actual use environment of bridge steel structures:

[0004] Uneven distribution of corrosive gas: When conducting corrosion tests with existing test equipment, corrosive gas is usually sprayed onto the surface of the steel structure in a fixed manner. This method may not truly simulate the complex environmental conditions that bridge steel structures are exposed to in actual use;

[0005] The corrosive medium will react with the surface of the steel structure, and the products produced by the rapid reaction cannot be exposed to the outside world for a long time like in actual use and cannot fall off on their own, thereby causing the reaction products to affect the results of subsequent corrosion tests;

[0006] Therefore, it is necessary to design a bridge steel structure corrosion resistance detection device that is highly practical and can reduce the impact of steel structure surface products on experimental results. Summary of the Invention

[0007] The purpose of the present invention is to provide a corrosion resistance detection device for bridge steel structures to solve the problems raised in the above background technology.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a corrosion resistance detection device for a bridge steel structure, comprising a corrosion barrel, wherein a base is fixedly connected to the lower side of the corrosion barrel, a cover is fixedly connected to the upper side of the corrosion barrel, an air intake pipe is fixedly connected to the middle part of the cover, the interior of the corrosion barrel is connected to the upper side of the cover via the air intake pipe, a placement rack is fixedly connected to the lower part of the inner side wall of the corrosion barrel, a cleaning mechanism is provided on the side wall of the corrosion barrel, and a filtering mechanism is provided on the lower side of the base, an exhaust pipe is fixedly connected to the right side of the lower part of the base, and the exhaust pipe connects the interior of the corrosion barrel with the lower side of the base;

[0009] The cleaning mechanism includes a transmission assembly and a cleaning brush on the transmission assembly, wherein the cleaning brush can rotate relative to the corrosion barrel and can move up and down relative to the corrosion barrel;

[0010] The filtering mechanism includes a rotating assembly and a collection box. The interior of the collection box is a hollow structure. A partition is fixedly connected to the inner wall of the collection box, and the partition divides the interior of the collection box into five independent cavities.

[0011] According to the above technical solution, the transmission assembly includes a first motor, the outer wall of the first motor is fixedly connected to the right side of the outer wall of the corrosion barrel, an opening is opened on the right side of the corrosion barrel, the first motor is located on the right side of the opening, the output end of the first motor is fixedly connected to the first gear, a sleeve is provided inside the corrosion barrel, the lower part of the outer wall of the sleeve contacts the inner wall of the corrosion barrel, a toothed groove is provided in the middle part of the side wall of the sleeve, the toothed groove of the side wall of the sleeve is engaged with the outer wall of the first gear, the upper part of the outer wall of the sleeve is threadedly connected to the inner wall of the corrosion barrel, the upper part of the inner wall of the sleeve is fixedly connected to a cleaning brush, and the cleaning mechanism also includes a dandruff removal mechanism, which is provided on the lower side of the cover.

[0012] According to the above technical solution, the length of the sleeve in the up-down direction is greater than the up-down length of the right side opening of the corrosion barrel, and a thread groove is provided on the upper part of the side wall of the corrosion barrel, and a thread protrusion is provided on the upper part of the outer side wall of the sleeve, and the lower side of the sleeve is located on the lower side of the right side opening of the corrosion barrel.

[0013] According to the above technical solution, the chip removing mechanism includes a rotating ring, the outer wall of the rotating ring is rotatably connected to the inner wall of the sleeve through a bearing, the inner wall of the rotating ring is fixedly connected to a connecting block, the outer wall of the connecting block is fixedly connected to a rack, the upper end of the rack passes through the cover and extends to the outside of the cover, the lower side of the cover is fixedly connected to a mounting bracket, the lower part of the mounting bracket is provided with a mounting hole, a rotating rod is inserted into the mounting hole on the lower side of the mounting bracket, the outer wall of the rotating rod contacts the inner wall of the mounting hole, one end of the outer wall of the rotating rod is fixedly connected to a second gear, the outer wall of the second gear is meshed with the outer wall of the rack, and the middle part of the rotating rod is fixedly connected to a spoiler block.

[0014] According to the above technical solution, the outer wall of the rack contacts the inner wall of the cover, and only the lower part of the rack is provided with a toothed structure, and the downward movement of the rack can cause the second gear to rotate one hundred and eighty degrees, and the friction force between the outer wall of the rotating rod and the inner wall of the mounting frame is greater than the gravity of the spoiler.

[0015] According to the above technical solution, the spoiler block is a water drop structure, the spoiler block is located on the lower side of the lower end of the air intake pipe, the gravity of the spoiler block is less than the friction between the inner wall of the mounting frame and the outer wall of the rotating rod, and the spoiler block is located in the middle of the cleaning brush.

[0016] According to the above technical solution, the rotating assembly includes a second motor, the upper side of the second motor is fixedly connected to the lower surface of the base, the output end of the second motor is fixedly connected to the first bevel gear, the lower side of the base is provided with an installation position that passes through up and down, the inner wall of the installation position is rotatably connected to the second bevel gear through a bearing, the outer wall of the second bevel gear is meshed with the outer wall of the first bevel gear, the inner wall of the corrosion barrel is located at the lower side of the placement rack and is fixedly connected to a gathering plate, the collection box is located on the lower side of the gathering plate, the outer wall of the collection box is rotatably connected to the lower side of the inner wall of the corrosion barrel through a bearing, the lower surface of the collection box is in contact with the upper side of the second bevel gear, the upper side of the collection box is provided with five upper holes, and the lower side of the collection box is provided with five lower holes.

[0017] According to the above technical solution, the upper hole and the lower hole on the collection box are respectively arranged to correspond to the five chambers inside the collection box, and a collection port is provided on the gathering plate. The upper hole located on the right side is connected to the collection port on the gathering plate, and the lower surface of the collection port of the gathering plate is in contact with the upper side of the outer wall of the collection box, and the lower hole located on the right side is connected to the upper side of the exhaust pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects: by providing an air inlet pipe capable of supporting the entry of gaseous corrosive media, the present invention enables the corrosive gas to evenly cover the surface of the steel structure, thereby producing an effect of simulating the gaseous corrosion conditions in the actual environment;

[0019] By providing a cleaning mechanism, the products attached to the surface of the steel structure can be effectively removed during the test, thereby improving the corrosion efficiency of the corrosive gas on the surface of the steel structure;

[0020] By providing a reversible spoiler, the airflow can more evenly cover the surface of the steel structure after passing through the spoiler, thereby creating a more uniform blowing effect on the surface of the steel structure;

[0021] By providing a rotating component and a collection box, debris mixed in the airflow can be effectively captured and filtered, thereby maintaining the purity of the airflow and the stability of the test environment, making it easier to collect experimental samples at different stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the lower structure of the present invention;

[0025] Figure 3 This invention Figure 2 Schematic diagram of the enlarged structure of A in the middle;

[0026] Figure 4 It is a schematic diagram of the internal structure of the corrosion barrel of the present invention;

[0027] Figure 5 Schematic diagram of the internal structure of the sleeve of the present invention;

[0028] Figure 6 It is a schematic structural diagram of the dandruff removal mechanism of the present invention;

[0029] Figure 7 This invention Figure 6 Schematic diagram of the enlarged structure of B;

[0030] Figure 8 It is a schematic diagram of the internal structure of the collection box of the present invention.

[0031] In the figure: 1. corrosion barrel; 2. base; 3. sealing cover; 4. air inlet pipe; 5. placement rack; 6. cleaning mechanism; 7. filtering mechanism; 8. exhaust pipe; 601. first motor; 602. first gear; 603. sleeve; 604. cleaning brush; 605. chip removal mechanism; 701. second motor; 702. first bevel gear; 703. second bevel gear; 704. gathering plate; 705. collection box; 706. upper hole; 707. partition; 708. lower hole; 501. swivel; 502. connecting block; 503. rack; 504. mounting rack; 505. rotating rod; 506. second gear; 507. spoiler. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1-8The present invention provides a technical solution: a corrosion resistance detection device for a bridge steel structure, comprising a corrosion barrel 1, a base 2 being fixedly connected to the lower side of the corrosion barrel 1, a cover 3 being fixedly connected to the upper side of the corrosion barrel 1, an air intake pipe 4 being fixedly connected to the middle part of the cover 3, the interior of the corrosion barrel 1 and the upper side of the cover 3 being connected via the air intake pipe 4, a placement rack 5 being fixedly connected to the lower part of the inner wall of the corrosion barrel 1, a cleaning mechanism 6 being provided on the side wall of the corrosion barrel 1, and a filtering mechanism 7 being provided on the lower side of the base 2, an exhaust pipe 8 being fixedly connected to the right side of the lower part of the base 2, and the exhaust pipe 8 connecting the interior of the corrosion barrel 1 with the lower side of the base 2;

[0034] When in use, the cover 3 is removed upwards, and then the steel structure to be tested is placed on the upper side of the placement rack 5, and then the cover 3 is fixed back to the upper side of the corrosion barrel 1, and then salt spray and other corrosive gases are introduced into the interior of the corrosion barrel 1 through the upper end of the inlet pipe 4. Then the gas covers the surface of the steel structure for corrosion test, and the gas can be discharged through the exhaust pipe 8, and then new corrosive gas can be continuously introduced to ensure the concentration of the corrosive gas;

[0035] The cleaning mechanism 6 includes a transmission assembly and a cleaning brush 604 on the transmission assembly. The cleaning brush 604 can rotate relative to the corrosion barrel 1, and the cleaning brush 604 can move up and down relative to the corrosion barrel 1. The transmission assembly includes a first motor 601. The outer wall of the first motor 601 is fixedly connected to the right side of the outer wall of the corrosion barrel 1. The right side of the corrosion barrel 1 is provided with an opening. The first motor 601 is located on the right side of the opening. The output end of the first motor 601 is fixedly connected to the first gear 602. The interior of the corrosion barrel 1 is provided with a sleeve 603. The lower part of the outer wall of the sleeve 603 contacts the inner wall of the corrosion barrel 1. The sleeve 603 A toothed groove is provided in the middle of the side wall, the toothed groove of the side wall of the sleeve 603 is meshed with the outer wall of the first gear 602, the upper part of the outer wall of the sleeve 603 is threadedly connected to the inner wall of the corrosion barrel 1, and the upper part of the inner wall of the sleeve 603 is fixedly connected to the cleaning brush 604. The cleaning mechanism 6 also includes a chip removal mechanism 605, which is arranged on the lower side of the cover 3. The length of the sleeve 603 in the vertical direction is greater than the vertical length of the right opening of the corrosion barrel 1, and a threaded groove is provided on the upper part of the side wall of the corrosion barrel 1, and a threaded protrusion is provided on the upper part of the outer wall of the sleeve 603. The lower side of the sleeve 603 is located at the lower side of the right opening of the corrosion barrel 1;

[0036] During the test, when products are generated on the surface of the steel structure, the first motor 601 can be started to drive the first gear 602 to rotate, and then the first gear 602 drives the sleeve 603 to rotate. Since the upper side of the sleeve 603 is threadedly connected to the inner wall of the corrosion barrel 1, the sleeve 603 will descend when it rotates, and at the same time drive the cleaning brush 604 to rotate and descend, so that the cleaning brush 604 cleans the surface of the steel structure, so that the products attached to the surface of the steel structure fall off, thereby ensuring that the corrosive gas can continue to corrode the surface of the steel structure efficiently;

[0037] The chip removal mechanism 605 includes a rotating ring 501, the outer wall of the rotating ring 501 is rotatably connected to the inner wall of the sleeve 603 through a bearing, the inner wall of the rotating ring 501 is fixedly connected to a connecting block 502, the outer wall of the connecting block 502 is fixedly connected to a rack 503, the upper end of the rack 503 passes through the cover 3 and extends to the outside of the cover 3, the lower side of the cover 3 is fixedly connected to a mounting bracket 504, the lower part of the mounting bracket 504 is provided with a mounting hole, a rotating rod 505 is inserted into the mounting hole on the lower side of the mounting bracket 504, the outer wall of the rotating rod 505 contacts the inner wall of the mounting hole, one end of the outer wall of the rotating rod 505 is fixedly connected to the second gear 506, the second gear 506 The outer wall is meshed with the outer wall of the rack 503, and the middle part of the rotating rod 505 is fixedly connected with a spoiler 507. The outer wall of the rack 503 contacts the inner wall of the cover 3, and the rack 503 is only provided with a toothed structure at the lower part. The rack 503 moves downward to rotate the second gear 506 180 degrees. The friction between the outer wall of the rotating rod 505 and the inner wall of the mounting bracket 504 is greater than the gravity of the spoiler 507. The spoiler 507 is a water drop structure. The spoiler 507 is located on the lower side of the lower end of the air inlet pipe 4. The gravity of the spoiler 507 is less than the friction between the inner wall of the mounting bracket 504 and the outer wall of the rotating rod 505. The spoiler 507 is located in the middle of the cleaning brush 604.

[0038] When the corrosive airflow passes through the upper end of the spoiler block 507, the spoiler block 507 is in a teardrop shape, and the larger hemispherical structure on its lower side causes airflow chaos. Moreover, since the airflow quickly diffuses outward after moving to the lower end of the air inlet pipe 4, the airflow is evenly covered from top to bottom on the surface of the steel structure under the turbulence of the spoiler block 507.

[0039] When the sleeve 603 moves downward to remove the products on the surface of the steel structure, the sleeve 603 drives the rotating ring 501, the connecting block 502, and the rack 503 to move downward relative to the second gear 506, thereby causing the second gear 506 to drive the second gear 506 to rotate. When the second gear 506 rotates, it drives the spoiler block 507 to turn 180 degrees, thereby moving its larger end to the upper side, so that when the airflow passes through the spoiler block 507, the tail end of the spoiler block 507 is gathered toward the middle, thereby generating a more concentrated blowing force on the upper side of the steel structure surface, so that the cleaning brush 604 blows away the debris generated by cleaning the surface of the steel structure and the debris adhered to the cleaning brush 604, thereby preventing the surface of the steel structure from being adhered to the surface after the products are cleaned;

[0040] The filtering mechanism 7 includes a rotating assembly and a collection box 705. The interior of the collection box 705 is a hollow structure. The inner wall of the collection box 705 is fixedly connected to a partition 707. The partition 707 divides the interior of the collection box 705 into five independent cavities. The rotating assembly includes a second motor 701. The upper side of the second motor 701 is fixedly connected to the lower surface of the base 2. The output end of the second motor 701 is fixedly connected to the first bevel gear 702. The lower side of the base 2 is provided with a mounting position that passes through the upper and lower parts. The inner wall of the mounting position is rotatably connected to the second bevel gear 703 through a bearing. The outer wall of the second bevel gear 703 is meshed with the outer wall of the first bevel gear 702. The inner wall of the corrosion barrel 1 is located at the lower side of the placement rack 5 and is fixedly connected to a gathering plate 704. The collection The box 705 is located at the lower side of the collecting plate 704. The outer wall of the collecting box 705 is rotatably connected to the lower side of the inner wall of the corrosion barrel 1 through a bearing. The lower surface of the collecting box 705 contacts the upper side of the second bevel gear 703. The upper side of the collecting box 705 is provided with five upper holes 706, and the lower side of the collecting box 705 is provided with five lower holes 708. The upper holes 706 and the lower holes 708 on the collecting box 705 are respectively arranged to correspond to the five chambers inside the collecting box 705. The collecting plate 704 is provided with a collecting port. The upper hole 706 on the right side is connected to the collecting port on the collecting plate 704. The lower surface of the collecting port of the collecting plate 704 contacts the upper side of the outer wall of the collecting box 705. The lower hole 708 on the right side is connected to the upper side of the exhaust pipe 8.

[0041] During use, filter material can be filled in the internal cavity of the collection box 705. During the process of continuous air flow passing through the corrosion barrel 1 and the cleaning brush 604 cleaning the surface of the steel structure, the air flow can enter the cavity inside the collection box 705 through the gathering plate 704, and then be discharged through the cavity through the lower hole 708 and the exhaust pipe 8. In this process, debris and other impurities mixed in the air flow can be retained by the filter material. After a chamber has been used for a period of time, the second motor 701 can be started to drive the first bevel gear 702 and the second bevel gear 703 to rotate, thereby causing the collection box 705 to rotate, so that different lower holes 708 are connected to the gathering plate 704, thereby facilitating the subsequent collection of experimental samples at different stages.

[0042] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A corrosion resistance detection device for a bridge steel structure, comprising a corrosion barrel (1), characterized in that: The lower side of the corrosion barrel (1) is fixedly connected to a base (2), the upper side of the corrosion barrel (1) is fixedly connected to a cover (3), the middle part of the cover (3) is fixedly connected to an air inlet pipe (4), the interior of the corrosion barrel (1) and the upper side of the cover (3) are connected via the air inlet pipe (4), the lower part of the inner wall of the corrosion barrel (1) is fixedly connected to a placement rack (5), the side wall of the corrosion barrel (1) is provided with a cleaning mechanism (6), and the lower side of the base (2) is provided with a filtering mechanism (7), the lower right side of the lower part of the base (2) is fixedly connected to an exhaust pipe (8), and the exhaust pipe (8) connects the interior of the corrosion barrel (1) with the lower side of the base (2); The cleaning mechanism (6) includes a transmission assembly and a cleaning brush (604) on the transmission assembly, wherein the cleaning brush (604) can rotate relative to the corrosion barrel (1), and the cleaning brush (604) can move in an up-down direction relative to the corrosion barrel (1); The filtering mechanism (7) comprises a rotating assembly and a collection box (705). The interior of the collection box (705) is a hollow structure. A partition (707) is fixedly connected to the inner wall of the collection box (705). The partition (707) divides the interior of the collection box (705) into five independent cavities.

2. The corrosion resistance detection device for bridge steel structures according to claim 1 is characterized in that: The transmission assembly includes a first motor (601), the outer wall of the first motor (601) is fixedly connected to the right side of the outer wall of the corrosion barrel (1), the right side of the corrosion barrel (1) is provided with an opening, the first motor (601) is located on the right side of the opening, the output end of the first motor (601) is fixedly connected to the first gear (602), the interior of the corrosion barrel (1) is provided with a sleeve (603), the lower part of the outer wall of the sleeve (603) contacts the inner wall of the corrosion barrel (1), the middle part of the side wall of the sleeve (603) is provided with a toothed groove, the toothed groove of the side wall of the sleeve (603) is meshed with the outer wall of the first gear (602), the upper part of the outer wall of the sleeve (603) is threadedly connected to the inner wall of the corrosion barrel (1), the upper part of the inner wall of the sleeve (603) is fixedly connected to the cleaning brush (604), and the cleaning mechanism (6) also includes a chip removal mechanism (605), and the chip removal mechanism (605) is provided on the lower side of the cover (3).

3. The corrosion resistance detection device for bridge steel structures according to claim 2, characterized in that: The length of the sleeve (603) in the vertical direction is greater than the vertical length of the right opening of the corrosion barrel (1), and a thread groove is provided on the upper part of the side wall of the corrosion barrel (1), and a thread protrusion is provided on the upper part of the outer wall of the sleeve (603), and the lower side of the sleeve (603) is located on the lower side of the right opening of the corrosion barrel (1).

4. The corrosion resistance detection device for bridge steel structures according to claim 3 is characterized by: The chip removal mechanism (605) comprises a rotating ring (501), the outer wall of the rotating ring (501) is rotatably connected to the inner wall of the sleeve (603) via a bearing, the inner wall of the rotating ring (501) is fixedly connected to a connecting block (502), the outer wall of the connecting block (502) is fixedly connected to a rack (503), the upper end of the rack (503) passes through the cover (3) and extends to the outside of the cover (3), and the lower side of the cover (3) is fixedly connected to a mounting frame (503). 4), a mounting hole is provided at the lower portion of the mounting frame (504), a rotating rod (505) is inserted into the mounting hole at the lower side of the mounting frame (504), an outer wall of the rotating rod (505) contacts the inner wall of the mounting hole, one end of the outer wall of the rotating rod (505) is fixedly connected to a second gear (506), an outer wall of the second gear (506) is meshed with an outer wall of the rack (503), and a spoiler (507) is fixedly connected to the middle portion of the rotating rod (505).

5. The corrosion resistance detection device for bridge steel structures according to claim 4 is characterized in that: The outer wall of the rack (503) contacts the inner wall of the cover (3), and only the lower part of the rack (503) is provided with a toothed structure. The rack (503) moves downward to rotate the second gear (506) one hundred and eighty degrees. The friction force between the outer wall of the rotating rod (505) and the inner wall of the mounting frame (504) is greater than the gravity of the spoiler (507).

6. The corrosion resistance detection device for bridge steel structures according to claim 5, characterized in that: The spoiler block (507) is a water drop structure. The spoiler block (507) is located on the lower side of the lower end of the air inlet pipe (4). The gravity of the spoiler block (507) is smaller than the friction between the inner wall of the mounting frame (504) and the outer wall of the rotating rod (505). The spoiler block (507) is located in the middle of the cleaning brush (604).

7. The corrosion resistance detection device for bridge steel structures according to claim 6, characterized in that: The rotating assembly includes a second motor (701), the upper side of the second motor (701) is fixedly connected to the lower surface of the base (2), the output end of the second motor (701) is fixedly connected to the first bevel gear (702), the lower side of the base (2) is provided with a mounting position that passes through the upper and lower parts, the inner wall of the mounting position is rotatably connected to the second bevel gear (703) through a bearing, the outer wall of the second bevel gear (703) is meshed with the outer wall of the first bevel gear (702), and the corrosion barrel (1) The inner wall of the collecting box (705) is fixedly connected to the lower side of the placing frame (5), and the collecting box (705) is located on the lower side of the collecting plate (704). The outer wall of the collecting box (705) is rotatably connected to the lower side of the inner wall of the corrosion barrel (1) through a bearing. The lower surface of the collecting box (705) contacts the upper side of the second bevel gear (703). Five upper holes (706) are opened on the upper side of the collecting box (705), and five lower holes (708) are opened on the lower side of the collecting box (705).

8. The corrosion resistance detection device for bridge steel structures according to claim 7, characterized in that: The upper hole (706) and the lower hole (708) on the collection box (705) are respectively arranged to correspond to the five chambers inside the collection box (705); the collecting plate (704) is provided with a collecting port; the upper hole (706) located on the right side is connected to the collecting port on the collecting plate (704); the lower surface of the collecting port of the collecting plate (704) contacts the upper side of the outer wall of the collection box (705); the lower hole (708) located on the right side is connected to the upper side of the exhaust pipe (8).

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