Pretreatment device and equipment for surface corrosion prevention of profiled steel sheet

Abstract

The invention relates to the technical field of corrosion prevention, in particular to a pretreatment device and equipment for corrosion prevention of the surface of a profiled steel sheet. The pretreatment device comprises a steel wire brush and a dust collection cover with an opening in one end and a hollow structure, the steel wire brush is embedded into the dust collection cover, and one end of the brush face of the steel wire brush protrudes out of the opening of the dust collection cover; the other end of the wire brush is coaxially and fixedly connected with a rotating shaft, the end, opposite to the wire brush, of the rotating shaft penetrates through the end wall of the closed end of the dust hood and extends out of the dust hood, and the rotating shaft is rotationally matched with the dust hood. An air outlet hole is formed in the end wall of the closed end of the dust collection cover, an impeller is rotationally connected into the air outlet hole, a linkage assembly is arranged between the impeller and the rotating shaft, and when the rotating shaft rotates on the dust collection cover, the linkage assembly drives the impeller to rotate to generate negative pressure to extract air in the dust collection cover. The problems that in the prior art, dust is involved in air and pervades into an operation space, environment pollution is caused, and the health of operators is harmed are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of corrosion prevention, and in particular to a pretreatment device and equipment for corrosion prevention of the surface of a corrugated steel plate. Background Art

[0002] Corrugated steel sheets are widely used in building roofs and walls. Their surfaces are susceptible to environmental corrosion and require pretreatment (rust removal and cleaning) before applying anti-corrosion coatings. Mechanical rust removal is essential in this surface pretreatment process. Traditionally, high-speed rotating wire brushes or grinding wheels are used to polish the steel surface.

[0003] However, a large amount of iron oxide dust is generated during the grinding process, and as the wire brush or grinding wheel rotates at high speed, the dust is drawn into the air and diffuses into the working space, causing environmental pollution and even endangering the health of operators. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a pretreatment device and equipment for anti-corrosion of corrugated steel plate surface, so as to solve the problem of dust being drawn into the air and diffusing into the working space in the prior art, causing environmental pollution and endangering the health of operators.

[0005] The present invention is achieved through the following technical solutions:

[0006] A pretreatment device for anti-corrosion of the surface of a corrugated steel plate, comprising a wire brush and a dust collecting hood with an open end and a hollow structure, wherein the wire brush is embedded in the dust collecting hood, and one end of the brush surface of the wire brush protrudes outside the opening of the dust collecting hood, and the other end of the wire brush is coaxially fixedly connected to a rotating shaft, and the end of the rotating shaft facing away from the wire brush passes through the end wall of the closed end of the dust collecting hood and protrudes outside the dust collecting hood, and the rotating shaft and the dust collecting hood are rotatably matched;

[0007] An air outlet is provided on the end wall of the closed end of the dust collecting hood, and an impeller is rotatably connected in the air outlet. A linkage component is provided between the impeller and the rotating shaft. When the rotating shaft rotates on the dust collecting hood, the linkage component drives the impeller to rotate to generate negative pressure to extract the air in the dust collecting hood.

[0008] Furthermore, the linkage assembly includes a gear and an outer gear ring arranged outside the closed end of the dust collecting cover, and the gear is coaxially fixedly connected to the middle part of the rotating shaft;

[0009] The outer gear ring is rotatably connected to the dust collecting cover, and the outer gear ring is meshed with the gear;

[0010] The impeller is embedded in the outer gear ring and is coaxially fixedly connected to the outer gear ring. The interior of the outer gear ring is communicated with the interior of the air outlet.

[0011] Further, the outer gear ring is coaxially fixedly connected with a first limiting ring at one end facing the dust collecting cover, the first limiting ring is embedded into the air outlet hole and coaxially rotates with the side wall of the air outlet hole.

[0012] Further, the gear is coaxially fixedly connected with a second limiting ring at one end facing the dust collecting cover, the second limiting ring is inserted into the dust collecting cover through the end wall of the closed end of the dust collecting cover, and the second limiting ring rotates with the dust collecting cover.

[0013] Further, one end of the rotating shaft facing the steel wire brush is a cylinder, and the other end away from the steel wire brush is a prism;

[0014] The outer size of the cross section of the prism is smaller than that of the cylinder;

[0015] A through hole matched with the prism is formed in the gear, and the prism passes through the through hole and is in sliding fit with the side wall of the through hole;

[0016] A limiting pin is inserted into the middle of the prism, and the gear is in abutment with the cylinder and the limiting pin at both ends.

[0017] Further, a protective disc is detachably fixedly connected to the closed end of the dust collecting cover, and one plane of the protective disc facing the dust collecting cover is attached to the outer wall of the closed end of the dust collecting cover;

[0018] An avoiding slot for placing the gear and the outer gear ring is formed on one plane of the protective disc facing the dust collecting cover, and an air outlet connector is arranged on the other plane of the protective disc away from the dust collecting cover, and the air outlet connector is in communication with the inside of the outer gear ring.

[0019] Further, an avoiding hole for the rotating shaft to pass through is also formed on the other plane of the protective disc away from the dust collecting cover, the avoiding hole is in communication with the avoiding slot, and one plane of the gear away from the dust collecting cover is attached to the other plane of the avoiding slot.

[0020] Further, a storage tank for collecting dust is arranged outside the dust collecting cover, and at least two air inlet connectors are formed at the top end of the storage tank;

[0021] A gas guide pipe is arranged between the storage tank and the dust collecting cover, one end of the gas guide pipe is detachably fixedly connected with and in communication with the air outlet connector, and the other end is detachably fixedly connected with and in communication with one of the air inlet connectors.

[0022] Further, a liquid medium for dissolving and absorbing dust is stored in the storage tank, and an extension pipe is arranged at one end of the gas guide pipe facing the storage tank;

[0023] One end of the extension pipe is inserted into the gas guide pipe and fixedly connected with and in communication with the gas guide pipe, and the other end is inserted into the storage tank from the corresponding air inlet connector and extends below the liquid level.

[0024] The utility model provides a kind of pretreatment equipment for the surface of profiled steel sheet anticorrosion, including above-mentioned pretreatment device and electric drill main body, the one end of pivot back to steel wire brush is with electric drill main body output end transmission connection, dust cover is detachably fixedly connected with the shell of electric drill main body.

[0025] The present application has the following advantages:

[0026] The pretreatment device for the surface of profiled steel sheet anticorrosion and equipment, by setting dust cover on steel wire brush cover, form a isolation barrier around steel wire brush using dust cover, limit dust to spread around, reduce the probability that dust is rolled into air and diffuse to work space, protect environment, reduce the harm to operator's health. Meanwhile, kinetic energy is transmitted to impeller through linkage assembly, use the one-way flow formed by air entering from dust cover opening end and discharging from air outlet hole to transport dust to specified direction by negative pressure extraction of air in dust cover using impeller rotation. Therefore, when steel wire brush carries out polishing and cleaning work, impeller automatically carries out air extraction and dust collection work, limit dust to spread around dust cover, reduce the probability that dust is rolled into air and diffuse to work space.

[0027] Other advantages, objects, and features of the present application will be better understood from the following specification, and will be more fully appreciated when the following specification is considered in conjunction with the accompanying drawings and the appended claims. The present application should be understood, and it will be appreciated that the foregoing and various other advantages and benefits of the present application can be obtained from a merely practical application of the principles of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a perspective view of the embodiment of the present application;

[0029] Figure 2 It is a plane structure schematic view of the embodiment of the present application;

[0030] Figure 3 It is Figure 2 the sectional view of A-A in it;

[0031] Figure 4 It is Figure 3 the enlarged view of C in it;

[0032] Figure 5 It is Figure 2 the sectional view of B-B in it;

[0033] Figure 6 It is an explosion view of the embodiment of the present application;

[0034] Figure 7 It is a perspective view of the embodiment of the present application without electric drill main body and storage tank;

[0035] Figure 8It is a three-dimensional structure schematic diagram of the steel wire brush in the embodiment of the present application.

[0036] Figure 9 It is a three-dimensional structure schematic diagram of the dust collecting cover in the embodiment of the present application.

[0037] Figure 10 It is a three-dimensional structure schematic diagram of the gear in the embodiment of the present application.

[0038] Figure 11 It is a three-dimensional structure schematic diagram of the external gear ring in the embodiment of the present application.

[0039] Figure 12 It is a three-dimensional structure schematic diagram of the protection disc in the embodiment of the present application.

[0040] In the figure: 1, steel wire brush; 11, rotating shaft; 111, cylinder; 112, prism; 12, limiting pin; 2, dust collecting cover; 21, air outlet hole; 22, impeller; 31, gear; 311, second limiting ring; 312, through hole; 32, external gear ring; 321, first limiting ring; 4, protection disc; 41, avoiding slot; 42, air outlet joint; 43, avoiding hole; 44, connecting plate; 5, storage tank; 51, air inlet joint; 52, air guide pipe; 53, extension pipe; 6, electric drill main body. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts are within the scope of protection of the present application.

[0043] It should be noted that: similar numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0044] In the foregoing description of the present application, it should be noted that the terms "one side", "the other side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be construed as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the terms "first", "second" and the like are merely used to distinguish the description and cannot be construed as indicating or implying relative importance.

[0045] In addition, the term "same" and the like do not mean that the components must be absolutely the same, but there can be slight differences. The term "vertical" merely means that the positional relationship between the components is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0046] Please refer to Figures 1-12 The present application provides a technical solution: a pretreatment device for preventing corrosion on the surface of a profiled steel sheet, comprising a steel wire brush 1 and a dust collecting hood 2 with an open end in a hollow structure, the steel wire brush 1 is embedded in the dust collecting hood 2, one end of the brush surface of the steel wire brush 1 protrudes out of the opening of the dust collecting hood 2, the other end of the steel wire brush 1 is coaxially fixedly connected with a rotating shaft 11, one end of the rotating shaft 11 away from the steel wire brush 1 penetrates through the end wall of the closed end of the dust collecting hood 2 and extends out of the dust collecting hood 2, and the rotating shaft 11 is rotationally connected with the dust collecting hood 2;

[0047] An air outlet hole 21 is formed in the end wall of the closed end of the dust collecting hood 2, and an impeller 22 is rotationally connected in the air outlet hole 21, a linkage assembly is arranged between the impeller 22 and the rotating shaft 11, and when the rotating shaft 11 rotates in the dust collecting hood 2, the linkage assembly drives the impeller 22 to rotate to generate negative pressure to extract air in the dust collecting hood 2.

[0048] In this scheme, the dust collecting hood 2 is provided outside the steel wire brush 1, which forms an isolation barrier around the steel wire brush 1, limits the spread of dust to the surrounding area, reduces the probability of dust being rolled into the air and diffusing to the working space, protects the environment, and reduces the harm to the health of the operator. At the same time, kinetic energy is transmitted to the impeller 22 through the linkage assembly, and the impeller 22 rotates to generate negative pressure to extract air in the dust collecting hood 2, forming a one-way flow of air entering from the open end of the dust collecting hood 2 and being discharged from the air outlet hole 21, and transporting dust to a specified direction. Therefore, when the steel wire brush 1 is working, the impeller 22 automatically performs the air extraction and dust collection work, limiting the spread of dust around the dust collecting hood 2 and reducing the probability of dust being rolled into the air and diffusing to the working space.

[0049] Wherein, a filter screen can be arranged at the air outlet hole 21 to capture dust in the air. Or, the air outlet hole 21 is communicated with an external dust treatment device (such as a river Beijing environmental protection JX-XF cyclone dust collector) to purify the air by using the dust treatment device to remove dust in the air and discharge clean air.

[0050] The outer edge of the fan blade of the impeller 22 abuts against the side wall of the air outlet hole 21 to form a dynamic seal, reduce the backflow of air from the gap between the impeller 22 and the side wall of the air outlet hole 21, improve the negative pressure efficiency, and enhance the dust suction capacity.

[0051] The brush surface (steel wire) of the steel wire brush 1 protrudes out of the opening of the dust collecting cover 2, and can normally contact the surface of the profiled steel sheet during use to smoothly perform the polishing and cleaning work.

[0052] A notch can be formed on the end face of the opening end of the dust collecting cover 2 to communicate the inside and outside of the side wall of the dust collecting cover 2. When the opening end of the dust collecting cover 2 abuts against the surface of the profiled steel sheet (for example, when the steel wire brush 1 is seriously worn or worn to the limit), the notch can serve as a passage for external air to enter the dust collecting cover 2, and the external air entering from the notch can blow the dust adhering to the surface of the profiled steel sheet to promote the capture of dust. Figure 3 、 9 As shown.

[0053] In addition, a motor can be arranged outside the dust collecting cover 2 to provide power for the rotation of the rotating shaft 11. The motor is fixedly installed (such as bolted or welded) on the end wall of the closed end of the dust collecting cover 2, and the output end of the motor is drivingly connected (such as using a shaft coupling) with the rotating shaft 11.

[0054] During use, the dust collecting cover 2 or the motor housing is held by hand, the brush surface of the steel wire brush 1 is abutted against the surface of the profiled steel sheet, the motor is started, the motor drives the rotating shaft 11 to rotate, the steel wire brush 1 rotates at high speed to perform the polishing and cleaning work, and the impeller 22 synchronously rotates to draw out the air in the dust collecting cover 2, and the dust is mixed into the air to be drawn out together;

[0055] Then the drawn-out air is introduced into the cyclone dust collector to remove the dust mixed in the air through the cyclone dust collector, and finally clean air is discharged;

[0056] The air around the dust collecting cover 2 continuously flows into the dust collecting cover 2 from the gap or notch between the dust collecting cover 2 and the profiled steel sheet to continuously take away the dust in the dust collecting cover 2, so as to continuously perform the polishing and cleaning work.

[0057] In the embodiment, the linkage assembly includes a gear 31 arranged outside the closed end of the dust collecting cover 2 and an outer gear ring 32, the gear 31 is coaxially fixedly connected with the middle part of the rotating shaft 11;

[0058] The outer gear ring 32 is rotationally connected with the dust collecting cover 2, and the outer gear ring 32 is engaged with the gear 31.

[0059] The impeller 22 is embedded in the outer gear ring 32 and fixedly connected coaxially with the outer gear ring 32, and the inside of the outer gear ring 32 communicates with the inside of the air outlet hole 21.

[0060] In this scheme, as shown in Figure 3 , 6 The impeller 22 and the steel wire brush 1 are synchronized to work through the meshing transmission of the outer gear ring 32 and the gear 31. When the steel wire brush 1 rotates at high speed to polish and clean, the impeller 22 automatically rotates to perform the work of removing dust by sucking air, thereby improving the work efficiency.

[0061] In addition, the gear ratio (i) of the gear 31 and the outer gear ring 32 can be adjusted to make the meshing of the gear 31 and the outer gear ring 32 realize speed reduction and torque increase or speed increase and torque reduction (depending on the gear ratio), so as to flexibly adjust the rotating speed of the impeller 22 and the suction force generated by the impeller 22 until most of the dust in the dust collecting hood 2 can be sucked out.

[0062] When i>1 (speed reduction), the torque of the impeller 22 is increased, which is suitable for high resistance working conditions (such as large dust viscosity).

[0063] When i<1 (speed increase), the rotating speed of the impeller 22 is increased, and the suction force is enhanced.

[0064] In this embodiment, the end of the outer gear ring 32 facing the dust collecting hood 2 is fixedly connected coaxially with a first limiting ring 321, and the first limiting ring 321 is embedded in the air outlet hole 21 and rotationally matched with the side wall of the air outlet hole 21.

[0065] In this scheme, as shown in Figure 11 The first limiting ring 321 has a stepped shaft shape. A smaller diameter segment of the first limiting ring 321 is fixedly connected with the outer gear ring 32 through the air outlet hole 21, and the outer circular surface of the segment is rotationally matched with the side wall of the air outlet hole 21. A larger diameter segment of the first limiting ring 321 is located in the dust collecting hood 2, and the shaft shoulder of the first limiting ring 321 abuts against the inner wall of the closed end of the dust collecting hood 2, which can limit the axial movement of the outer gear ring 32 and only allow self-rotation, so as to stably mesh and transmit the outer gear ring 32 and the gear 31.

[0066] In this embodiment, the end of the gear 31 facing the dust collecting hood 2 is fixedly connected coaxially with a second limiting ring 311, the second limiting ring 311 penetrates the end wall of the closed end of the dust collecting hood 2 and is inserted into the dust collecting hood 2, and the second limiting ring 311 is rotationally matched with the dust collecting hood 2.

[0067] In this scheme, as shown in Figure 10As shown, the second limiting ring 311 is in the shape of a stepped shaft, a smaller diameter section of the second limiting ring 311 is fixedly connected with the gear 31 through the end wall of the closed end of the dust collecting cover 2 and rotationally cooperates with the end wall of the dust collecting cover 2; a larger diameter section of the second limiting ring 311 is located in the dust collecting cover 2, and the shaft shoulder of the second limiting ring 311 abuts against the inner wall of the closed end of the dust collecting cover 2, which can limit the axial movement of the gear 31 and only allow the rotation of the gear 31, so that the outer gear ring 32 and the gear 31 are stably meshed and driven.

[0068] In the embodiment, the shaft 11 has a cylinder 111 at one end facing the steel wire brush 1 and a prism 112 at the other end away from the steel wire brush 1;

[0069] The prism 112 has a cross-sectional size smaller than that of the cylinder 111;

[0070] The gear 31 is provided with a through hole 312 matched with the prism 112, and the prism 112 passes through the through hole 312 and is in sliding cooperation with the side wall of the through hole 312;

[0071] The prism 112 is inserted with a limiting pin 12, and the gear 31 is in abutment with the cylinder 111 and the limiting pin 12 at both ends.

[0072] In the embodiment, as shown in Figure 3 , 8 The prism 112 is inserted into the through hole 312 of the gear 31, and the cylinder 111 and the limiting pin 12 jointly limit the axial sliding of the gear 31. After the limiting pin 12 is pulled out and removed, the prism 112 can be slid out of the through hole 312, and the steel wire brush 1 can be removed for maintenance or replacement.

[0073] In addition, the through hole 312 is matched with the prism 112, and the prism 112 can only slide in the axial (length) direction in the through hole 312. Under the limiting action of the cylinder 111 and the limiting pin 12, the gear 31 can be driven to rotate at the same speed and in the same direction by controlling the rotation of the prism 112.

[0074] In the embodiment, the dust collecting cover 2 is fixedly connected with a protective disc 4 at the closed end, and a plane of the protective disc 4 facing the dust collecting cover 2 is attached to the outer wall of the closed end of the dust collecting cover 2;

[0075] The plane of the protective disc 4 facing the dust collecting cover 2 is provided with an avoiding groove 41 for placing the gear 31 and the outer gear ring 32, and the plane of the protective disc 4 away from the dust collecting cover 2 is provided with an air outlet connector 42 in communication with the inside of the outer gear ring 32.

[0076] In the embodiment, as shown in Figure 12As shown, the avoidance groove 41 is used to place the gear 31 and the outer gear ring 32, and the protective plate 4 is used to cover the gear 31 and the outer gear ring 32 to prevent the gear 31 and the outer gear ring 32 from being exposed to the outside, thereby reducing the risk of injury to the operator's hands due to accidental touch during work.

[0077] The protective plate 4 faces the dust hood 2 and is in contact with the outer wall of the closed end of the dust hood 2, restricting air from flowing out from the gap between the two, and using the air outlet joint 42 as the only channel for air in the protective plate 4 to move out.

[0078] The protection plate 4 is fixedly connected to the air collecting cover in a detachable manner (such as bolt connection), so that the protection plate 4 can be detached and removed to facilitate the inspection and replacement of the gear 31 and the outer gear ring 32.

[0079] In this embodiment, a plane of the protective plate 4 facing away from the dust cover 2 is provided with an avoidance hole 43 for the rotating shaft 11 to pass through, the avoidance hole 43 is connected to the avoidance groove 41, and an end face of the gear 31 facing away from the dust cover 2 is in contact with a plane relative to the avoidance groove 41.

[0080] In this scheme, if Figure 3 、 4 As shown, the end face of the gear 31 facing away from the dust collecting cover 2 is in contact with a plane relative to the avoidance groove 41, which can limit the air from moving out of the avoidance hole 43 and use the air outlet joint 42 as the only channel for the air in the protective plate 4 to move out.

[0081] In this embodiment: a storage tank 5 for collecting dust is provided outside the dust collecting hood 2, and at least two ventilation joints 51 are provided on the top of the storage tank 5;

[0082] An air duct 52 is provided between the storage tank 5 and the dust collecting hood 2 , one end of the air duct 52 is detachably fixedly connected to and communicated with the air outlet connector 42 , and the other end is detachably fixedly connected to and communicated with one of the ventilation connectors 51 .

[0083] In this embodiment, when one of the vent connectors 51 is connected to the air duct 52, it is defined as the inlet, and the remaining vent connectors 51 are defined as the outlet. A filter can be installed in the outlet to capture dust and store it in the storage tank 5. A one-way valve is installed in the inlet to prevent dust from flowing back into the dust hood 2.

[0084] A plurality of air outlet holes 21 are formed on the gas collecting cover, and a plurality of outer gear rings 32 are arranged on the plurality of air outlet holes 21, and the plurality of outer gear rings 32 are simultaneously engaged with the gear 31, and the plurality of impellers 22 in the plurality of outer gear rings 32 simultaneously perform air extraction and dust removal work, thereby improving work efficiency. However, the number of air vent joints 51 on the storage tank 5 is at least one more than the number of impellers 22, and when a plurality of air guide pipes 52 are connected to the corresponding number of air vent joints 51 for air supply, the remaining air vent joints 51 perform exhaust work.

[0085] The outer circular surfaces of the air outlet joint 42 and the air vent joint 51 are provided with external threads, and the two ends of the air guide pipe 52 are provided with internal threads corresponding to the air outlet joint 42 and the air vent joint 51, and the two ends of the air guide pipe 52 are threadedly connected to the air outlet joint 42 and the air vent joint 51, respectively, so as to facilitate the disassembly and removal of the storage tank 5, and the pouring or cleaning of the storage tank 5.

[0086] In this embodiment, the storage tank 5 stores a liquid medium for dissolving and absorbing dust, and the air guide pipe 52 is provided with an extension pipe 53 at one end facing the storage tank 5.

[0087] One end of the extension pipe 53 is inserted into the air guide pipe 52 and fixedly connected and communicated with the air guide pipe 52, and the other end is inserted into the storage tank 5 from the corresponding air vent joint 51 and extends below the liquid level.

[0088] In this scheme, as shown in Figure 5 The liquid medium can be selected as a 0.5%-2% sodium hydroxide (NaOH) aqueous solution to provide an alkaline environment in the storage tank 5 to promote the reaction and dissolution of the dust (iron ions in rust). The air is delivered to below the liquid level through the extension pipe 53 to fully mix the air with the liquid medium and promote the absorption of dust.

[0089] A pretreatment device for preventing corrosion on the surface of a profiled steel sheet, comprising the pretreatment device and a drill body 6, one end of the rotating shaft 11 opposite to the steel wire brush 1 is in transmission connection with the output end of the drill body 6, and the dust collecting cover 2 is detachably fixedly connected with the shell of the drill body 6.

[0090] In this scheme, as shown in Figure 1 , 6 A connecting plate 44 is arranged on a plane of the protective disc 4 opposite to the dust collecting cover 2, one end of the connecting plate 44 is fixedly connected with the protective disc 4, the other end extends towards the drill body 6, and the inner side surface of the connecting plate 44 is matched with the shell of the drill body 6, and the connecting plate 44 can be closely attached to the shell of the drill body 6.

[0091] The outer shell of the electric drill body 6 is composed of two symmetrically arranged shells, one of which is provided with a threaded hole, and the other shell is provided with a locking hole at an opposite position. A limiting hole opposite to the locking hole is provided on the connecting plate 44. By passing the threaded end of the screw through the limiting hole, the locking hole and the threaded hole in sequence, and finally connecting with the threaded hole through threaded cooperation, the two shells and the connecting plate 44 are locked and fixed together, thereby achieving the purpose of fixing the dust collection cover 2 on the electric drill body 6.

[0092] Among them, the model of the electric drill body 6 can be selected as Dongcheng J1Z-FF05-10A.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pretreatment device for anti-corrosion of the surface of a corrugated steel plate, comprising a wire brush (1) and a dust collecting hood (2) with an opening at one end and a hollow structure, wherein the wire brush (1) is embedded in the dust collecting hood (2), and one end of the brush surface of the wire brush (1) protrudes outside the opening of the dust collecting hood (2), characterized in that: The other end of the wire brush (1) is coaxially fixedly connected to a rotating shaft (11), and the end of the rotating shaft (11) facing away from the wire brush (1) passes through the end wall of the closed end of the dust collecting cover (2) and extends out of the dust collecting cover (2), and the rotating shaft (11) and the dust collecting cover (2) are rotatably matched; An air outlet (21) is provided on the end wall of the closed end of the dust collecting hood (2), and an impeller (22) is rotatably connected in the air outlet (21). A linkage assembly is provided between the impeller (22) and the rotating shaft (11). When the rotating shaft (11) rotates on the dust collecting hood (2), the linkage assembly drives the impeller (22) to rotate, thereby generating negative pressure and extracting air from the dust collecting hood (2).

2. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 1, characterized in that: The linkage assembly comprises a gear (31) and an outer gear ring (32) arranged outside the closed end of the dust collecting cover (2), and the gear (31) is coaxially fixedly connected to the middle part of the rotating shaft (11); The outer gear ring (32) is rotatably connected to the dust collecting cover (2), and the outer gear ring (32) is meshed with the gear (31); The impeller (22) is embedded in the outer gear ring (32) and is coaxially fixedly connected to the outer gear ring (32), and the interior of the outer gear ring (32) is communicated with the interior of the air outlet (21).

3. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 2, characterized in that: One end of the outer gear ring (32) facing the dust collecting cover (2) is coaxially fixedly connected to a first limiting ring (321); the first limiting ring (321) is embedded in the air outlet (21) and is coaxially rotated with the side wall of the air outlet (21).

4. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 2, characterized in that: The gear (31) is coaxially fixedly connected to one end of the gear (31) facing the dust collecting hood (2) with a second limiting ring (311), the second limiting ring (311) penetrates the end wall of the closed end of the dust collecting hood (2) and is inserted into the dust collecting hood (2), and the second limiting ring (311) is rotatably matched with the dust collecting hood (2).

5. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 2, characterized in that: The end of the rotating shaft (11) facing the wire brush (1) is a cylinder (111), and the end facing away from the wire brush (1) is a prism (112); The outer dimensions of the cross section of the prism (112) are smaller than the outer dimensions of the cross section of the cylinder (111); The gear (31) is provided with a through hole (312) adapted to the prism (112), and the prism (112) passes through the through hole (312) and is slidably engaged with a side wall of the through hole (312); A limiting pin (12) is inserted into the middle of the prism (112), and two ends of the gear (31) respectively abut against the cylinder (111) and the limiting pin (12).

6. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 2, characterized in that: A protective plate (4) is detachably fixedly connected to the outside of the closed end of the dust collecting hood (2); a plane of the protective plate (4) faces the dust collecting hood (2) and is in contact with the outer wall of the closed end of the dust collecting hood (2); A relief groove (41) for placing the gear (31) and the outer gear ring (32) is provided on a plane of the protection plate (4) facing the dust collecting cover (2), and an air outlet connector (42) is provided on a plane of the protection plate (4) facing away from the dust collecting cover (2), wherein the air outlet connector (42) is communicated with the interior of the outer gear ring (32).

7. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 6, characterized in that: A position-avoiding hole (43) for the rotating shaft (11) to pass through is also provided on a plane of the protection plate (4) facing away from the dust collecting cover (2); the position-avoiding hole (43) is communicated with the position-avoiding groove (41); and an end surface of the gear (31) facing away from the dust collecting cover (2) is in contact with a plane opposite to the position-avoiding groove (41).

8. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 6, characterized in that: A storage tank (5) for collecting dust is provided outside the dust collecting hood (2), and at least two ventilation joints (51) are provided at the top of the storage tank (5); An air duct (52) is provided between the storage tank (5) and the dust collecting hood (2), one end of the air duct (52) being detachably fixedly connected to and in communication with the air outlet connector (42), and the other end of the air duct (52) being detachably fixedly connected to and in communication with one of the ventilation connectors (51).

9. The device for pre-treating the surface of a corrugated steel sheet for corrosion prevention according to claim 8, characterized in that: The storage tank (5) contains a liquid medium for dissolving and absorbing dust, and an extension tube (53) is provided at one end of the air guide tube (52) facing the storage tank (5); One end of the extension tube (53) is inserted into the air guide tube (52) and is fixedly connected to and communicates with the air guide tube (52), and the other end is inserted into the storage tank (5) from the corresponding ventilation joint (51) and extends to below the liquid level.

10. A pretreatment device for anti-corrosion of a corrugated steel plate surface, comprising the pretreatment device according to any one of claims 1 to 9 and an electric drill body (6), characterized in that: One end of the rotating shaft (11) facing away from the wire brush (1) is in transmission connection with the output end of the electric drill body (6), and the dust collecting cover (2) is detachably fixedly connected to the outer shell of the electric drill body (6).

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