Automatic spraying device for reinforcing steel bars

Abstract

The invention discloses an automatic spraying device for reinforcing steel bars, which comprises a spraying mechanism, a spraying test piece rotating mechanism and an adjustable frame, and is integrated with a real-time coating thickness monitoring device and an automatic correction module. The spraying mechanism drives a spraying device to reciprocate between the connecting frames through a belt conveyor belt, the spraying test piece rotating mechanism drives a spraying test piece to rotate through a chain conveyor belt, and translation of the spraying test piece rotating mechanism is restrained by a limiting groove. The coating thickness real-time monitoring device transmits the coating thickness to the automatic correction module in real time, and the motor and the nozzle valve are further controlled. The device can spray steel bars of different types and diameters, and it is ensured that the thickness of a steel bar coating is uniform and controllable through an automatic detection device. The implementation of the device is beneficial to production of reinforcing steel bars with high corrosion resistance, the durability of a reinforced concrete structure is expected to be remarkably improved, and a good market application prospect is shown.

Description

Technical Field

[0001] The invention belongs to the field of steel bar corrosion prevention, and in particular relates to an automatic spraying device for steel bars. Background Art

[0002] The main methods for inspecting the working condition of fixing screws used in industrial equipment are currently manual inspection and specialized testing equipment. Manual inspection is labor-intensive, requires experience and proficiency, and cannot guarantee complete quality. Specialized testing equipment, such as torque wrenches, screw strain gauges, and ultrasonic stress measurement devices, is relatively expensive and unsuitable for use in confined and enclosed spaces. Reinforced concrete structures are widely used in buildings, tunnels, railway bridges, and other fields due to their high moldability, strong load-bearing capacity, readily available materials, and cost-effectiveness. However, in complex operating environments, particularly under the influence of chloride ions, steel corrosion has become a common challenge, severely testing the durability of structures. Rebar corrosion not only reduces the effective cross-sectional area of ​​the steel, affecting the bond between the steel and concrete, but also, because the corrosion products are two to six times larger than the original steel, they can cause rust-expansion internal stress in the concrete cover, leading to cracking and even delamination, thus accelerating the deterioration of the structure. Corrosion in my country's buildings and infrastructure costs approximately 100 billion yuan annually, primarily due to corrosion of the steel in concrete. Rebar corrosion not only causes significant economic losses but can also lead to the sudden collapse or premature failure of concrete structures. Therefore, corrosion protection measures for rebar in concrete structures are crucial to effectively reduce economic losses and improve structural safety.

[0003] At present, the commonly used corrosion protection measures for concrete structures mainly include: concrete surface coating, high-performance concrete, concrete rust inhibitors, coated steel bars, corrosion-resistant steel bars, cathodic protection, etc. Among them, steel bar coating acts directly on the surface of the steel bar, the cost is controllable, and it can play a good role in isolating the steel bar from the corrosive medium. It is also considered to be one of the most economical and effective steel bar anti-corrosion technologies. However, manual spraying will cause the thickness of the steel bar coating to be uneven or leak. When the coating thickness is small, the area will become a weak corrosion area, while a thicker coating will increase the cost and reduce the bonding performance with the concrete. Therefore, it is necessary to design an automated spraying device to make the thickness of the steel bar coating uniform and controllable. Summary of the Invention

[0004] In response to the above problems, the present invention proposes an automatic spraying device for steel bars, which provides the following solutions:

[0005] An automatic spraying device for steel bars, comprising: a spraying mechanism, a spraying specimen rotation mechanism and an adjustable frame, as well as a coating thickness real-time monitoring device and an automatic correction module;

[0006] The spraying mechanism reciprocates along the longitudinal direction of the adjustable frame; multiple groups of spray test pieces are installed laterally along the adjustable frame;

[0007] The spraying mechanism and the spray specimen rotating mechanism are both fixed on the adjustable aluminum frame; wherein the spraying mechanism is arranged above the spray specimen rotating mechanism for spraying the spray specimen installed in the spray specimen rotating mechanism;

[0008] The coating thickness real-time monitoring device detects the real-time coating thickness during the spraying process and feeds the data back to the automatic correction module;

[0009] The automatic correction module controls the start and stop of the spraying mechanism based on the real-time coating thickness.

[0010] Furthermore, the spraying mechanism includes:

[0011] a belt conveyor fixed to the crossbeam of the adjustable frame via a connecting bracket;

[0012] A plurality of equally spaced spraying devices are connected below the belt conveyor via connectors, with both ends of the connectors being slidably connected to slideways connected to the adjustable frame;

[0013] The first driving device is connected to the belt conveyor to drive the spraying device to reciprocate along the longitudinal direction of the adjustable frame.

[0014] Furthermore, a limit switch is provided on the connecting frame, and when the connecting member contacts the limit switch, the first driving device changes the driving direction.

[0015] Furthermore, the spray specimen rotation mechanism includes:

[0016] a second driving device, wherein the second driving device drives the transmission gear to rotate, and the gear drives the chain track to move through engagement;

[0017] A plurality of groups of spray test pieces are equidistantly distributed, and the spray test pieces are engaged with the chain rails to drive the spray test pieces to rotate.

[0018] Furthermore, the spraying specimen rotation mechanism also includes:

[0019] A limiting groove is fixed on the adjustable frame, and the limiting groove is arranged below the spray specimen. The limiting groove is provided with a number of paired limiting holes and waste liquid tanks equal to the number of the spray specimens. Both ends of the spray specimen are placed on the limiting holes respectively. The limiting holes are located inside the engagement between the spray specimen and the chain rail. The middle part of the limiting groove is sloped, and the waste liquid tank is used to collect waste liquid.

[0020] Furthermore, the spray test piece includes a hollow gear, a tightening sleeve, a rubber ring and a steel bar arranged from the inside out;

[0021] The expansion sleeve tightens the steel bar by rotating to expand the outer diameter and reduce the inner diameter. Its maximum outer diameter is consistent with the inner diameter of the hollow gear, and its width is twice as wide as the hollow gear.

[0022] The size and model of the hollow gear are consistent with the transmission gear;

[0023] The radius of the limiting hole in the limiting groove is consistent with the maximum outer diameter of the expansion sleeve.

[0024] Furthermore, the coating thickness real-time monitoring device detects the diameter of the steel bar during the spraying process, obtains the real-time coating thickness by comparing it with the initial steel bar diameter, and feeds the data back to the automatic correction module.

[0025] Furthermore, a coating thickness discrimination algorithm is preset in the automatic correction module, and the main contents of the coating thickness discrimination algorithm are as follows: if the spray thickness of the steel bar is less than a first threshold value of a predetermined thickness, the first drive transposition and the second drive device continue to work, and the spray device remains in a working state; if the spray thickness of the steel bar reaches a predetermined thickness, the first drive transposition, the second drive device and the spray device are turned off; if the spray thickness of the steel bar exceeds a second threshold value of a predetermined thickness, the first drive transposition, the second drive device and the spray device are turned off and the substandard steel bar is reported as damaged.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention can spray-coat both threaded ribbed and plain round steel bars, which are currently widely used in engineering projects. Through automated inspection, it ensures uniform and controllable coating thickness on the steel bars. The implementation of this invention facilitates the production of highly corrosion-resistant steel bars, potentially significantly improving the durability of reinforced concrete structures and demonstrating promising market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a front view of an embodiment of the present invention.

[0030] Figure 2 Schematic diagram of a spraying mechanism according to an embodiment of the present invention.

[0031] Figure 3Schematic diagram of the spray test piece rotation mechanism according to an embodiment of the present invention.

[0032] Figure 4 It is a partial schematic diagram of the spray specimen rotation mechanism according to an embodiment of the present invention.

[0033] Figure 5 It is a schematic cross-sectional view of European standard 3060 according to an embodiment of the present invention.

[0034] Figure: 1. Spraying mechanism; 11. Conveyor belt; 111. Belt; 112. Conveyor pulley; 12. Connecting frame; 13. First drive device; 131. Limit switch; 14. Spraying device; 141. Nozzle; 142. Nozzle; 143. Valve; 15. Connector; 16. Slide; 2. Spraying specimen rotation mechanism; 21. Spraying specimen; 211. Rebar; 212. Rubber ring; 213. Expansion sleeve; 214. Hollow gear ; 22. Chain rail; 23. Transmission gear; 24. Second drive device; 25. Limiting groove; 251. Limiting hole; 252. Waste liquid tank; 3. Adjustable aluminum frame; 31. Crossbeam; 32. Angle steel; 33. Longitudinal beam; 34. Vertical pole; 35. Secondary beam; 4. Real-time monitoring device for coating thickness; 41. Data transmission line; 5. Automatic correction module; 51. First data transmission line; 52. Second data transmission line; 53. Third data transmission line. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0036] It should be noted that, in the description of the embodiments of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] The terms "first," "second," and the like in this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that such terms are interchangeable where appropriate, so that embodiments of this application can be implemented in an order other than that illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects; for example, the first object can be one or more. Furthermore, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the connected objects.

[0038] Example 1

[0039] like Figure 1 As shown, the present invention provides an automatic spraying device for steel bars, the main components of which are as follows Figure 1 As shown, it mainly includes: a spraying mechanism 1, a spray specimen rotation mechanism 2 and an adjustable frame 3, a coating thickness real-time monitoring device 4 and an automatic correction module 5; it can meet the uniform spraying requirements of steel bars of different lengths.

[0040] The spraying mechanism 1 reciprocates longitudinally along the adjustable frame 3; multiple groups of spray test pieces 21 are installed transversely along the adjustable frame 3;

[0041] The spraying mechanism 1 and the spray specimen rotating mechanism 2 are both fixed on the adjustable frame 3; wherein the spraying mechanism 1 is arranged above the spray specimen rotating mechanism 2 for spraying the spray specimen installed in the spray specimen rotating mechanism 2;

[0042] The coating thickness real-time monitoring device 4 detects the real-time coating thickness during the spraying process and feeds the data back to the automatic correction module 5;

[0043] The automatic correction module 5 controls the start and stop of the spraying mechanism based on the real-time coating thickness.

[0044] Example 2

[0045] like Figure 2-3 As shown, the adjustable frame 3 is composed of a crossbeam 31, an angle steel 32, a longitudinal beam 33, a vertical rod 34 and a secondary beam 35. The crossbeam 31, the longitudinal beam 33, the vertical rod 34 and the secondary beam 35 are all made of retractable aluminum, and the cross section adopts the European standard 3060 cross section (such as Figure 5 As shown), each component is fastened by the same type of angle steel 32 and bolts.

[0046] like Figure 2As shown, the main bending member of the spraying mechanism, the crossbeam 31, is fixed to the vertical pole 34 by the angle steel 32. The spraying mechanism 1 is driven by the first driving device 13 to rotate the transmission wheel 112, and the transmission wheel drives the belt 111 to move back and forth through friction. The lower part of the belt 111 is fixed with a connecting member 15 that can move horizontally. The connecting member 15 drives multiple groups of equidistantly distributed spraying devices 14 to slide back and forth in a predetermined slide 16. The sliding range is located between the two connecting frames 12. When the steel plate 15 contacts the limit switch 131 fixed on both sides of the connecting frame 12, the first driving device 13 changes the driving direction.

[0047] In this embodiment, the first driving device is motor No. 1, and the connecting member 15 is a steel plate.

[0048] In this embodiment, a spraying device 14 can evenly spray two steel bars. It consists of a nozzle 142 and a nozzle 141. One end of the nozzle is connected to a pump and an anti-corrosion solution tank. The connecting frame 12 is fixed to the crossbeam 31 by bolts, and the position of the belt conveyor 11 is also fixed by bolts.

[0049] Spraying specimen rotation mechanism 2 Figure 3 As shown, the main bending member, longitudinal beam 33, is fixed to vertical pole 34 via angle steel 32. The spray specimen rotation mechanism 2 is driven by a second drive unit 24, which drives the transmission gear 23. The gears mesh and move the chain track 22. The chain track 22 rotates the spray specimen 21 during movement. The second drive unit is motor 2.

[0050] The components of the spray test piece 21 are, from outside to inside, a hollow gear 214, an expansion sleeve 213, a rubber ring 212 and a steel bar 211, which are placed on the limiting groove 25 and are constrained by the limiting hole 251 in translation. The expansion sleeve 213 tightens the steel bar by rotating to expand the outer diameter and reduce the inner diameter. Its maximum outer diameter is consistent with the inner diameter of the hollow gear 214, and its width is twice as wide as the hollow gear. If you need to spray steel bars of different diameters, you can replace the expansion sleeve model, so this device can meet the uniform spraying requirements of steel bars of different diameters. The size model of the hollow gear 214 is consistent with the transmission gear 23. The radius of the limiting hole 251 in the limiting groove 25 is consistent with the maximum outer diameter of the expansion sleeve 213, which is fixed to the longitudinal beam 33 through the secondary beam 35. The middle part of the limiting groove 25 is sloped, and the spraying waste liquid can be collected in the waste liquid tank 252. Figure 4 shown.

[0051] Furthermore, the real-time coating thickness detection device 4 can detect the diameter of the rebar during the spraying process. By comparing it with the initial rebar diameter, the real-time coating thickness can be obtained, and the data is further fed back to the automatic correction module 5 via the data transmission line 41. The automatic correction module 5 is pre-set with a coating thickness determination algorithm. The determination results are used to control the opening and closing of motors 1 and 2 and valve 143 of the spraying device 14 via the first data line 51, the second data line 52, and the third data line 53, respectively. The main contents of the coating thickness determination algorithm in this embodiment are as follows: If the sprayed thickness of the rebar is less than 90% of the predetermined thickness, the two motors continue to operate and the valve remains open; if the sprayed thickness of the rebar reaches the predetermined thickness, the two motors and valve 143 are turned off; if the sprayed thickness of the rebar exceeds 10% of the predetermined thickness, the two motors and valve 143 are turned off, and the substandard rebar is reported as damaged.

[0052] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An automatic spraying device for steel bars, characterized in that: include: Spraying mechanism, spray specimen rotation mechanism and adjustable frame, as well as coating thickness real-time monitoring device and automatic correction module; The spraying mechanism reciprocates along the longitudinal direction of the adjustable frame; multiple groups of spraying test pieces are installed laterally along the adjustable frame; The spraying mechanism and the spraying specimen rotating mechanism are both fixed on the adjustable frame; wherein the spraying mechanism is arranged above the spraying specimen rotating mechanism for spraying the spraying specimen installed in the spraying specimen rotating mechanism; The coating thickness real-time monitoring device detects the real-time coating thickness during the spraying process and feeds the data back to the automatic correction module; The automatic correction module controls the start and stop of the spraying mechanism based on the real-time coating thickness.

2. The automatic spraying device for steel bars according to claim 1, characterized in that: The spraying mechanism comprises: a belt conveyor fixed to the crossbeam of the adjustable frame by a connecting bracket; A plurality of spraying devices are equidistantly distributed and connected below the belt conveyor through a connecting piece, and both ends of the connecting piece are slidably connected to a slide groove connected to the adjustable frame; The first driving device is connected to the belt conveyor to drive the spraying device to reciprocate along the longitudinal direction of the adjustable frame.

3. The automatic spraying device for steel bars according to claim 2 is characterized in that: The connecting frame is provided with a limit switch, and when the connecting member contacts the limit switch, the first driving device changes the driving direction.

4. The automatic spraying device for steel bars according to claim 1, characterized in that: The spraying test piece rotating mechanism comprises: A second driving device, wherein the second driving device drives the transmission gear to rotate, and the gear drives the chain track to move through meshing; A plurality of groups of spray test pieces are equidistantly distributed, and the spray test pieces are meshed with the chain rails to drive the spray test pieces to rotate.

5. The automatic spraying device for steel bars according to claim 4 is characterized in that: The spraying test piece rotating mechanism also includes: A limiting groove is fixed on the adjustable frame, the limiting groove is arranged below the spray specimen, the limiting groove is provided with a pair of limiting holes and a waste liquid groove equal in number to the spray specimen, the two ends of the spray specimen are respectively placed on the limiting holes, the limiting holes are located inside the meshing of the spray specimen and the chain rail, the middle part of the limiting groove is sloped, and the waste liquid groove is used to collect waste liquid.

6. The automatic spraying device for steel bars according to claim 5, characterized in that: The spray test piece includes a hollow gear, a tightening sleeve, a rubber ring and a steel bar arranged from the inside to the outside; The expansion sleeve tightens the steel bar by rotating to expand the outer diameter and reduce the inner diameter. Its maximum outer diameter is consistent with the inner diameter of the hollow gear, and its width is twice as wide as the hollow gear. The size and model of the hollow gear are consistent with those of the transmission gear; The radius of the limiting hole in the limiting groove is consistent with the maximum outer diameter of the expansion sleeve.

7. The automatic spraying device for steel bars according to claim 1, characterized in that: The coating thickness real-time monitoring device detects the diameter of the steel bar during the spraying process, obtains the real-time coating thickness by comparing it with the initial steel bar diameter, and feeds the data back to the automatic correction module.

8. The automatic spraying device for steel bars according to claim 1, characterized in that: A coating thickness discrimination algorithm is preset in the automatic correction module, and the main contents of the coating thickness discrimination algorithm are as follows: if the spraying thickness of the steel bar is less than a first threshold value of a predetermined thickness, the first drive transposition and the second drive device continue to work, and the spraying device remains in a working state; if the spraying thickness of the steel bar reaches a predetermined thickness, the first drive transposition, the second drive device and the spraying device are turned off; if the spraying thickness of the steel bar exceeds a second threshold value of a predetermined thickness, the first drive transposition, the second drive device and the spraying device are turned off and the substandard steel bar is reported as damaged.

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