Rebar Coating Device

Abstract

This utility model belongs to the technical field of general surface coating of fluid materials, specifically relating to a rebar coating device. The utility model includes a roller, a roller frame, a spray pipe, a spray pipe frame, a nozzle, a roller shaft, axle teeth, a transmission gear, a connecting rod, and universal joints. The nozzle is mounted on the spray pipe, which is rotatably mounted on the spray pipe frame. The roller shaft is coaxial with the roller and rotatably mounted on the roller frame. Axle teeth are mounted on the roller shaft, and the transmission gear meshes with the axle teeth. Universal joints are respectively mounted on the spray pipe and the transmission gear. The connecting rod has two universal joints at each end. This utility model combines uniform linear movement with the automatic periodic rotation and oscillation of the nozzle through a connecting rod transmission. As the operator pushes the spray pipe forward along the length of the rebar, the internal transmission mechanism composed of connecting rods automatically drives the nozzle to periodically rotate and oscillate around the rebar axis, thereby achieving a uniform coating effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of general surface coating of fluid materials, and particularly relates to a component of a spraying device, specifically a steel bar coating device capable of uniform coating. Background Technology

[0002] In concrete corrosion protection construction, spraying anti-corrosion protective agents on exposed steel bars is a crucial protective measure. Its fundamental purpose is to prevent or delay the occurrence and development of steel bar corrosion, thereby ensuring the long-term safety and durability of concrete structures.

[0003] In existing technologies, the process of spraying anti-corrosion protective agents onto steel bars is generally carried out manually by hand. The distance between the spray gun and the working surface should be about 100mm, and the angle between the spray gun and the steel bar surface should be kept perpendicular. The coating is kept uniform by moving smoothly and at a consistent speed.

[0004] However, handheld spraying has many drawbacks. For example, the nozzle of the spray gun cannot always stay along the rebar and may deviate during the process. The spray gun can often only spray one angle or one side of the rebar. Switching the spraying surface will also affect the forward movement of the spray gun. Moreover, it is impossible to accurately control the spraying time of each side of the rebar. All of the above, handheld spraying is difficult to achieve a uniform spraying effect on the rebar. Utility Model Content

[0005] The purpose of this invention is to provide a rebar coating device that can achieve a uniform coating effect on rebar.

[0006] The technical solution adopted by this utility model to solve the above problems is: a steel bar coating device, including a roller, a roller frame, a spray pipe, a spray pipe frame, a nozzle, a roller shaft, axle teeth, a transmission gear, a connecting rod, and a universal joint; the nozzle is set on the spray pipe, the spray pipe is rotatably set on the spray pipe frame, the roller shaft is coaxial with the roller, the roller shaft is rotatably set on the roller frame, the axle teeth are set on the roller shaft, the transmission gear is meshed with the axle teeth, the universal joints are respectively set on the spray pipe and the transmission gear, and the two ends of the connecting rod are respectively set on two universal joints.

[0007] A further preferred technical solution includes a front roller and an arch bridge; the front roller and the roller are rotatably connected via the arch bridge.

[0008] A further preferred technical solution includes: a side roller and a connecting frame; the side roller is rotatably connected to the connecting frame, and the connecting frame is also mounted on the nozzle frame or arch bridge.

[0009] A further preferred technical solution is that, in the direction of travel, the side roller is located between the roller and the front roller.

[0010] A further preferred technical solution is that the roller is rolled on the reinforcing bar, and the center of the nozzle and the axis of the reinforcing bar are on the same horizontal plane.

[0011] A further preferred technical solution is that the side rollers are rolled on the side reinforcing bars.

[0012] A further preferred technical solution is that the roller frame is mounted on the nozzle frame.

[0013] A further preferred technical solution is that the transmission gear is rotatably mounted on the inner side of the roller frame.

[0014] A further preferred technical solution is that the nozzle is equipped with two nozzles, which are symmetrically arranged about the axis of the reinforcing bar.

[0015] A further preferred technical solution includes a wearable device for supplying liquid to the nozzle.

[0016] In summary, this utility model has the following advantages:

[0017] 1. This utility model combines uniform linear movement with the automatic periodic rotation and oscillation of the nozzle through a linkage transmission. As the operator pushes the nozzle forward along the length of the steel bar, the transmission mechanism composed of linkages inside the device will automatically drive the nozzle to rotate and oscillate periodically around the axis of the steel bar, thereby achieving a uniform spraying effect.

[0018] 2. In this utility model, the roller rolls close to the steel bar, directly driving the device to move forward at a constant speed, replacing the walking operation when manually holding the spray gun, reducing labor intensity and avoiding uneven speed.

[0019] 3. In this utility model, the front roller and the roller form a double-point support to prevent the device from tilting forward or backward.

[0020] 4. In this utility model, the side rollers roll in contact with the side steel bars to ensure that the device always remains horizontal and moves along the axis of the steel bars.

[0021] 5. In this utility model, two nozzles are symmetrically arranged in the spray pipe. When they swing, the two nozzles are synchronous and opposite in phase. The strong coverage areas overlap and intersect each other, so as to uniformly spray the entire steel bar. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the roller in this utility model.

[0024] Figure 3 This is a schematic diagram of the structure of the roller frame and nozzle frame of this utility model.

[0025] Figure 4 for Figure 3 A schematic diagram of the rear view from a rotating perspective.

[0026] Figure 5 for Figure 3 A cross-sectional schematic diagram.

[0027] Figure 6 This is a schematic diagram of the adjustment groove.

[0028] In the attached diagram, the components represented by each number are as follows: roller 1, roller frame 2, nozzle 3, nozzle frame 4, nozzle 5, roller shaft 6, wheel shaft tooth 7, transmission gear 8, connecting rod 9, universal joint 10, front roller 12, arch bridge 13, side roller 14, connecting frame 15, adjusting groove 16, side steel bar 98, steel bar 99. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law. Example

[0031] refer to Figures 1-5 The rebar coating device includes a roller 1, a roller frame 2, a spray pipe 3, a spray pipe frame 4, a nozzle 5, a roller shaft 6, a wheel axle gear 7, a transmission gear 8, a connecting rod 9, and a universal joint 10. The nozzle 5 is mounted on the spray pipe 3, the spray pipe 3 is rotatably mounted on the spray pipe frame 4, the roller shaft 6 is coaxially mounted with the roller 1, the roller shaft 6 is rotatably mounted on the roller frame 2, the wheel axle gear 7 is mounted on the roller shaft 6, the transmission gear 8 is meshed with the wheel axle gear 7, the universal joint 10 is mounted on the spray pipe 3 and the transmission gear 8 respectively, and the two ends of the connecting rod 9 are mounted on two universal joints 10 respectively.

[0032] During the spraying process, the worker can place roller 1 against the reinforcing bar 99 and move it along the extension direction of the reinforcing bar 99. The forward rolling of roller 1 drives the nozzle 5 behind it to move in the same direction and at the same speed. As roller 1 rotates, it also drives the transmission gear 8 through the axle teeth 7. When the transmission gear 8 rotates, it drives the connecting rod 9 to perform periodic motion through the eccentrically positioned universal joint 10. The other end of the connecting rod 9 is connected to the spray pipe 3 through another universal joint 10. During the periodic motion of the connecting rod 9, it also drives the spray pipe 3 to reciprocate around its axis, thereby causing the nozzle 5 to perform periodic oscillating motion along the extension axis of the reinforcing bar 99, making the spraying process more uniform. For any areas missed during the oscillation process, simply repeating the spraying once or several times will ensure that the nozzle 5 sprays almost all parts of the reinforcing bar 99, achieving a uniform spraying effect.

[0033] The roller 1 is a freely rotating wheel. Its surface, which contacts the reinforcing bar, can be designed with grooves or a contour suitable for the bar's shape to ensure stable rolling along the reinforcing bar 99 without slippage. The roller 1 is a moving component mounted on the reinforcing bar, supporting the device and providing power for axial movement along the bar. The rolling motion of the roller 1 directly drives the entire transmission system, primarily composed of the connecting rod 9. The roller 1 also replaces walking when holding the spray gun, allowing the device to move stably and at a uniform speed along the reinforcing bar.

[0034] The roller frame 2 provides a stable framework or support structure for mounting and supporting the roller shaft 6 and the roller 1. It provides a mounting base for the roller 1 and its transmission components, ensuring stable and parallel rotation of the roller and bearing part of the device's weight. The roller shaft 6 is a shaft passing through the center of the roller 1, with both ends mounted on the roller frame 2 via bearings or bushings. This allows the roller 1 to rotate around the shaft. The roller shaft 6 serves as the central axis of rotation for the roller 1, simultaneously transmitting the rotational power of the roller 1 directly to the gear teeth 7 mounted on it. The gear teeth 7 are gears or a set of teeth fixedly mounted on the roller shaft 6, transmitting the rotational motion of the roller shaft 6 to the meshing transmission gear 8, converting the roller's motion into gear rotation.

[0035] The transmission gear 8 is a freely rotating gear mounted on a bearing or bushing, whose teeth mesh correctly with the axle teeth 7. It receives the rotational power transmitted from the axle teeth 7 and transmits it outward. The universal joint 10 on the side of the transmission gear 8 is a ball joint or universal joint type connector. One port is a mounting base, fixed to the gear body of the transmission gear 8, but positioned off-center from the gear's axis of rotation. The other port is used to connect to the connecting rod 9. The universal joint 10 transmits the movement of the off-center point on the transmission gear 8 to the connecting rod 9, allowing the angle of the connecting rod 9 to change during movement, but ensuring that the distance between the two universal joints 10 is always the length of the connecting rod 9.

[0036] The connecting rod 9 is a rigid rod with a hinge hole or mounting position at each end, used to connect the universal joint 10 on the transmission gear side and the universal joint 10 on the nozzle 3 side, respectively, converting the circular motion trajectory generated by the eccentric point of the transmission gear 8 into a limited-angle rotational oscillation of the nozzle 3. The universal joint 10 on the nozzle 3 side has a similar or identical structure to the universal joint 10 on the transmission gear 8 side. The nozzle 3 is a hollow pipe or rod used to transport reagents sprayed onto the reinforcing steel, such as corrosion inhibitors. One end is connected to a reagent supply device, and the other end is fitted with a nozzle 5, which is rotatably supported on the nozzle frame 4 via bearings or bushings. The nozzle frame 4 is a stable frame or bracket used to install and support the nozzle 3 and its rotating mechanism, such as a bearing housing. The nozzle 5 is an atomizing nozzle installed at the outlet end of the nozzle 3. The nozzle 5 oscillates periodically under the drive of the nozzle 3, and its spray surface continuously changes angle, sweeping across the entire circumference of the steel bar. Although one oscillation usually does not cover 360°, multiple sprays can ensure 360° uniform coverage.

[0037] It also includes a front roller 12 and an arch bridge 13; the front roller 12 is rotatably connected to the roller 1 via the arch bridge 13. The front roller 12 has a similar or identical structure to the roller 1 and can be located at the very front of the entire device, in front of the roller 1, cooperating with the rear roller 1 to further improve the stability of the device moving on the reinforcing steel. The arch bridge 13 is a rigidly connected, curved arched support or bridge-like frame member, with its shape being an upward arch at the top and the bottom being the area connecting the roller 1 and the front roller 12, defining the fixed distance and relative positional relationship between them.

[0038] It also includes a side roller 14 and a connecting frame 15; the side roller 14 is rotatably connected to the connecting frame 15, which is also mounted on the nozzle frame 4 or the arch bridge 13. The structure of the side roller 14 is similar to or the same as that of the roller 1 and the front roller 12. During the movement of the device, especially on irregular steel bar surfaces or when the operation is slightly biased, a slight lateral twist or offset will occur on the arc surface parallel to the steel bar surface. The side roller 14 enables the roller 1 and the front roller 12 to always move along a horizontal angle without tilting forward, thus preventing them from detaching from the steel bar 99.

[0039] Roller 1 is mounted on rebar 99, and the center of nozzle 5 is on the same horizontal plane as the axis of rebar 99. This design ensures that the shortest distance from nozzle 3 to the axis of rebar 99 is always constant, regardless of the position of nozzle 5 in its swing trajectory, further improving the uniformity of coating thickness.

[0040] The side roller 14 is rolled on the side steel bar 98. Usually, there are multiple side steel bars 98 on the side of the steel bar 99, and they are located on the same horizontal plane as the steel bar 99. The side roller 14 is directly set on the side steel bar 98, which can more conveniently guide the roller 1 and the front roller 12.

[0041] The roller bracket 2 is mounted on the nozzle bracket 4. The roller bracket 2 and the nozzle bracket 4 can be installed as a single unit, with both the roller 1 and the nozzle 3 mounted on it.

[0042] The transmission gear 8 is rotatably mounted on the inner side of the roller frame 2 to facilitate the transmission of the rotational force of the roller shaft 6.

[0043] The nozzle 3 is equipped with two nozzles 5, which are symmetrically arranged about the axis of the reinforcing bar 99. When a single nozzle swings, weak coverage areas are easily created, resulting in insufficient coverage of the reinforcing bar relative to the opposite side of the single nozzle. When the two nozzles are arranged symmetrically, the swing phases are synchronized and reversed, and the entire circumference of the reinforcing bar is repeatedly sprayed with the strong coverage areas of the two nozzles, achieving uniform coating.

[0044] It also includes a wearable device 11 for supplying liquid to the nozzle 3. The wearable device 11 is a wearable equipment that integrates a carrying system, a liquid supply pipeline, and an intelligent control module. The wearable device 11 has a built-in constant pressure liquid supply system, which is integrated below the tank to ensure a stable output of liquid to the nozzle 3.

[0045] In this embodiment, the specific method of using the rebar coating device is as follows:

[0046] 1. Place roller 1 and front roller 12 together on the steel bar 99 to be coated. Roller 1, as the main moving part, should abut against the surface of the steel bar; front roller 12 is connected to roller 1 via arch bridge 13 to provide additional support. If there are parallel side steel bars 98 around the steel bar, select a connecting frame 15 of appropriate length and place the side roller 14 on the side steel bars 98 to provide guidance and prevent lateral deviation or tilting during the movement of the device.

[0047] 2. The spraying liquid is supplied to the nozzle 3 through the wearable device 11. After the operator puts on the device, the constant pressure liquid supply system is activated to ensure a stable output of liquid to the nozzle 3.

[0048] 3. Two nozzles 5 are symmetrically installed on the nozzle 3. It is necessary to check whether the spray angle of the two nozzles 5 is aligned with the axis of the reinforcing bar.

[0049] 4. The worker slowly pushes the device along the extension direction of the rebar 99. The roller 1 begins to roll on the rebar. The rotation of the roller 1 drives the roller shaft 6 to rotate coaxially. The wheel shaft teeth 7 follow the rotation and cause the transmission gear 8 to mesh and rotate. The universal joint 10 on the transmission gear 8 is eccentrically set, converting the rotation into the periodic motion of the connecting rod 9. The connecting rod 9 is connected to the spray pipe 3 through the universal joint 10 at the other end, causing the spray pipe 3 to make a reciprocating arc rotational motion along its axis. Finally, the nozzle 5 is fixed on the spray pipe 3, thus making a periodic oscillating motion to further evenly spray and cover the rebar. By setting two nozzles 5, the circumferential surface of the rebar can be completely covered.

[0050] In addition, refer to Figure 6 The transmission gear 8 is also provided with an adjustment groove 16. The universal joint 10 is installed on the transmission gear 8 by means of the adjustment groove 16. The inner end of the universal joint 10 is provided with a locking part, which can be locked on the inner groove surface of the adjustment groove 16. By adjusting the position of the universal joint 10 in the adjustment groove 16 and replacing the connecting rod 9 of the corresponding length, the degree of eccentricity of the universal joint 10 on the transmission gear 8 is adjusted, that is, the swing amplitude of the nozzle 5 is adjusted.

[0051] Furthermore, the same or similar element symbols are used as far as possible in the accompanying drawings and description to refer to the same or similar parts or steps. The drawings are presented in a simplified form and are not drawn to scale. For convenience and clarity only, directional terms such as top, bottom, front, back, left, right, front, back, upward, above, above, below, behind, and front may be used to refer to the drawings. These and similar directional terms should not be construed as limiting the scope of this disclosure in any way.

Claims

1. Reinforcing bar coating apparatus characterised in that, It includes a roller (1), a roller frame (2), a nozzle (3), a nozzle frame (4), a nozzle (5), a roller shaft (6), a gear (7), a transmission gear (8), a connecting rod (9), and a universal joint (10); the nozzle (5) is mounted on the nozzle (3), the nozzle (3) is rotatably mounted on the nozzle frame (4), the roller shaft (6) is coaxially mounted with the roller (1), the roller shaft (6) is rotatably mounted on the roller frame (2), the gear (7) is mounted on the roller shaft (6), the transmission gear (8) meshes with the gear (7), the universal joint (10) is mounted on the nozzle (3) and the transmission gear (8) respectively, and the two ends of the connecting rod (9) are mounted on the two universal joints (10) respectively.

2. The reinforcing bar coating apparatus according to claim 1, wherein It also includes a front roller (12) and an arch bridge (13); the front roller (12) and the roller (1) are rotatably connected through the arch bridge (13).

3. The reinforcing bar coating apparatus of claim 2, wherein It also includes a side roller (14) and a connecting frame (15); the side roller (14) is rotatably connected to the connecting frame (15), and the connecting frame (15) is also provided on the nozzle frame (4) or the arch bridge (13).

4. The reinforcing bar coating apparatus of claim 3, wherein In the direction of travel, the side roller (14) is located between the roller (1) and the front roller (12).

5. The reinforcing bar coating apparatus of claim 1, wherein The roller (1) is rolled on the reinforcing bar (99), and the center of the nozzle (5) is on the same horizontal plane as the axis of the reinforcing bar (99).

6. The reinforcing bar coating apparatus of claim 3, wherein The side roller (14) is rolled on the side steel bar (98).

7. The reinforcing bar coating apparatus of claim 1, wherein The roller frame (2) is mounted on the nozzle frame (4).

8. The steel bar coating device according to claim 1, characterized in that, The transmission gear (8) is rotatably mounted on the inner side of the roller frame (2).

9. The reinforcing bar coating apparatus of claim 1, wherein The nozzle (3) is provided with two nozzles (5), which are arranged symmetrically about the axis of the steel bar (99).

10. The reinforcing bar coating apparatus of claim 1, wherein It also includes a wearable device (11) for supplying liquid to the nozzle (3).

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