Automatic dough collecting device

Abstract

The invention provides an automatic dough collecting device which comprises a rotary driving unit and a dough collecting unit, the telescopic operating arm assembly is connected with the rotary driving unit and rotates synchronously with the rotary driving unit; the height adjusting and assembly quick-changing unit is arranged at the top end of the telescopic operating arm assembly; and the double-channel collaborative surface finishing assembly is detachably connected with the height adjusting and assembly quick-changing unit. The automatic surface finishing device realizes full automation of surface finishing operation of the top surface of the pipe joint, has the advantages of wide adaptation range, high surface finishing quality, high efficiency and convenience in maintenance, effectively solves the problems of high manual dependence degree, unstable quality and poor equipment adaptability in the prior art, and is particularly suitable for production of large-diameter pipe joints.

Description

Technical Field

[0001] This invention belongs to the technical field of precast pipe production equipment, and specifically relates to a device for automatically finishing (leveling and smoothing) the exposed outer surface of large vertically cast concrete pipe sections (such as jacking pipes, culverts, and pipe piles). Background Technology

[0002] In the vertical production (vertical casting) process of large concrete pipe sections (such as pipe jacking for municipal engineering), concrete is poured and vibrated into shape within a cylindrical mold. Before demolding, the mold surrounds the sides and bottom of the pipe section, while the annular outer surface at the top is exposed and in an unfinished, rough state. Finishing this annular area is a crucial step in ensuring the product's appearance quality, the smoothness of subsequent joints, and the adhesion of the anti-corrosion and waterproofing layers.

[0003] Currently, this process relies almost entirely on manual labor. Workers must use tools such as scrapers and trowels to work at heights around the mold, trimming the upper annular curved surface of large pipe sections. This method has the following prominent problems: 1. Low work efficiency: The slow speed of manual dough collection has become a bottleneck process that restricts the overall efficiency of the production line.

[0004] 2. Poor quality consistency: The force, angle, trajectory, and number of passes of manual operation are difficult to control precisely, resulting in large fluctuations in the flatness and smoothness of the upper annular surface of the pipe section, easily causing defects such as local depressions, wavy lines, or trowel marks. This problem is particularly prominent on the large annular surface of the upper part of large-diameter pipe sections, seriously affecting the product appearance and interface quality.

[0005] 3. High labor intensity and high safety risks: The work surface is located at a high altitude, and workers need to look up and raise their hands to operate for a long time. The finishing of large tunnel segments is even more physically demanding and poses a safety hazard at height.

[0006] 4. High skill dependence: The quality of the product depends heavily on the experience and sense of responsibility of the workers, making it difficult to achieve standardized production.

[0007] There are very few automated solutions available in the industry for this process, and there is a lack of mature and reliable dedicated equipment. Therefore, there is an urgent practical need to develop an automated dough-collecting device that can stably and efficiently complete this process. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of existing technologies that rely on manual finishing of the exposed surface of the upper part of vertical concrete pipe sections, such as low efficiency, unstable quality, and high labor intensity, and to provide an automated finishing device that can be adapted to different specifications and has excellent finishing quality.

[0009] The technical solution is: an automatic dough collection device, comprising: Rotary drive unit; The telescopic operating arm assembly is connected to the rotary drive unit and rotates synchronously with the rotary drive unit; A height adjustment and component quick-change unit is located at the top of the telescopic boom assembly; The dual-track collaborative finishing component is detachably connected to the height adjustment and component quick-change unit.

[0010] Furthermore, the dual-channel collaborative finishing assembly is provided with a first finishing section and a second finishing section in sequence from front to back along the working direction. Both are fixed to the lower part of the connecting base plate, and the upper end of the connecting base plate and the height adjustment and component quick-change unit are detachably connected.

[0011] Furthermore, the angle between the first and second receiving surfaces and the connecting substrate is between 90° and 135°, and the first and second receiving surfaces are arranged in parallel.

[0012] Furthermore, the distance between the first and second contouring surfaces ranges from 10 to 30 centimeters.

[0013] Furthermore, the first receiving section is a rigid irregular-shaped receiving panel, and the second receiving section is an elastic irregular-shaped receiving panel.

[0014] Furthermore, both the first and second receiving sections include a receiving panel body and wing plates located at both ends of the receiving panel body. The wing plates extend radially outward from the ends of the receiving panel body towards the working area, and the angle between the two wing plates is larger the further away from the receiving panel body.

[0015] Furthermore, the rotary drive unit includes a drive motor, a rotary base, and a positioning base. The positioning base is fixed to the center of the inner mold of the pipe section mold by a mounting bracket. The rotary base is coaxially and rotatably connected to the positioning base. The drive motor is fixed to the positioning base and is connected to the rotary base through a gear transmission mechanism, driving the rotary base to rotate around the axis.

[0016] Furthermore, the telescopic boom assembly includes a fixed section and a telescopic section. One end of the fixed section is fixedly connected to the rotary drive unit, and the telescopic section is nested inside the fixed section and can extend and retract axially. A locking element is provided at the connection between the fixed section and the telescopic section.

[0017] Furthermore, the height adjustment and quick-change component unit is connected to the free end of the telescopic section, and a hydraulic cylinder is provided on its top. A fixed plate is connected to the lower end of the hydraulic cylinder, and the dual-track collaborative face-gathering component is detachably installed below the fixed plate by bolts.

[0018] Furthermore, the dual-path collaborative surface-forming component is a serialized design, available in various sizes.

[0019] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention solves the problems of poor adaptability, unstable finishing quality and low automation of existing technologies by using a centrally rotated drive unit, a radially telescopic adjustable telescopic operating arm assembly, a height adjustment and component quick-change unit with hydraulic pressurization and bolt quick-change height adaptation, and a series of integrated dual-track collaborative finishing components. It achieves efficient and high-precision automated finishing (leveling and smoothing) of the outer surface of pipe sections of different specifications.

[0020] 2. Fully automated and highly efficient: It realizes automatic rotation and face-gathering around the core, completely replacing the high-intensity manual work, increasing production efficiency several times, and the process parameters (speed, pressure) can be precisely controlled, which is conducive to quality standardization.

[0021] 3. Excellent versatility and adaptability: Radial adaptation: The telescopic boom allows for quick adjustment of the working radius, covering a variety of pipe diameters.

[0022] Axial / Wall Thickness Adaptation: The dual-channel collaborative face-forming assembly is a series design. By replacing different sizes of series face-forming assemblies, it can accurately and quickly adapt to pipe sections with different wall thicknesses, avoiding complex on-site height adjustments. It has a wide range of adaptability and high switching efficiency.

[0023] 4. High-quality finishing effect: The dual-stage finishing component adopts a dual-stage collaborative process of "rigid leveling + flexible finishing". First, the steel plate scrapes off the laitance and levels the surface, and then the PU board compacts and smooths it. The two work together to ensure that the surface flatness, smoothness and consistency after finishing are better than those of single-tool operation.

[0024] 5. Stable structure and convenient maintenance: The central fixing method ensures smooth operation; bolt connection and clamp-type locking parts ensure the rigidity of each connection point; modular and serialized design allows core vulnerable parts (face-forming components) to be replaced independently and quickly, greatly reducing maintenance costs and downtime. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the automatic dough-collecting device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the dual-channel collaborative surface-forming component structure according to an embodiment of the present invention; Figure 3 yes Figure 2 Sectional view at point AA; Figure 4 This is a diagram showing the usage state of the automatic dough-collecting device according to an embodiment of the present invention.

[0026] In the above figures: 1. Automatic dough-collecting device; 10. Rotary drive unit; 11. Drive motor; 12. Rotating base; 13. Positioning base; 20. Telescopic operating arm assembly; 21. Fixed section; 22. Telescopic section; 23. Locking component; 30. Height adjustment and quick-change component unit; 31. Hydraulic cylinder; 32. Fixing plate; 40. Dual-track collaborative dough-collecting assembly; 41. Connecting base plate; 42. First dough-collecting section; 421. Dough-collecting panel body; 422. Wing plate; 43. Second dough-collecting section; 2. Tube section; 3. Inner mold; 4. Outer mold; 5. Mounting frame. Detailed Implementation

[0027] To facilitate understanding of the present invention by those skilled in the art, specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0028] like Figures 1-3 As shown, the present invention proposes an automatic dough-collecting device 1 for pipe sections, including a rotary drive unit 10, a telescopic operating arm assembly 20, a height adjustment and quick-change assembly unit 30, and a dual-track cooperative dough-collecting assembly 40.

[0029] The rotary drive unit 10 serves as the mounting base and rotational power source for the entire device, and includes a drive motor 11, a rotating base 12, and a positioning base 13. The positioning base 13 is fixed to the center of the inner mold 3 of the pipe section production mold via a rigid mounting bracket 5. The rotating base 12 is coaxially and rotatably mounted on the positioning base 13. During installation, it is ensured that the rotation axis of the rotating base 12 precisely coincides with the central axis of the pipe section 2. The output end of the drive motor 11 is connected to the rotating base 12 via a gear transmission mechanism, used to drive the rotating base 12 and all components carried on it to rotate uniformly around the central axis. In this embodiment, the gear transmission mechanism includes a large gear and a small gear. The large gear is installed at the connection between the rotating base 12 and the positioning base 13, and the small gear is installed at the output end of the drive motor 11.

[0030] The telescopic boom assembly 20 adopts a nested telescopic structure, with one end of its fixed section 21 fixedly connected to the rotating base 12. The telescopic section 22 is nested within the fixed section 21 and can freely extend and retract axially, thereby flexibly adjusting the radial length of the entire boom to accommodate pipe sections 2 of different diameters. A locking element 23 is provided on the outer side of the connection area between the fixed section 21 and the telescopic section 22 to securely lock them together after adjustment, ensuring structural stability during operation. In this embodiment, the locking element 23 uses a clamp-type locking mechanism for easy operation.

[0031] The height adjustment and quick-change component unit 30 is connected to the free end of the telescopic section 22. A hydraulic cylinder 31 is located at the top of this unit, and the lower end of the piston rod of the hydraulic cylinder 31 is fixedly connected to a horizontally positioned fixed plate 32. The fixed plate 32 has several connection holes. This unit has two core functions: first, it provides controllable and stable downward pressure through the hydraulic cylinder 31, ensuring the face-forming component fits tightly against the top surface of the pipe section; second, it uses bolts and nuts to fix the fixed plate 32 to the connecting base plate 41, enabling quick disassembly and replacement of the lower face-forming component.

[0032] To accommodate pipe sections 2 with different wall thicknesses, the dual-track co-facing assembly 40 is designed in a series of different sizes, allowing for quick replacement via bolt connections. This facilitates the replacement of different sizes of the dual-track co-facing assembly 40 according to actual needs. The dual-track co-facing assembly 40 includes a connecting base plate 41, a first facing section 42, and a second facing section 43. The first facing section 42 and the second facing section 43 are arranged sequentially from front to back along the working direction (i.e., the rotation direction), and both are fixed to the lower end of the connecting base plate 41.

[0033] Specifically, the connecting base plate 41 has multiple mounting holes for mounting bolts. These mounting holes correspond to the aforementioned connecting holes, and are secured by bolts and nuts upon installation. Alternatively, in another embodiment, studs are welded at the mounting hole locations, with the studs functioning similarly to bolts, while the rest remains unchanged. This not only facilitates assembly and disassembly but also allows for fine-tuning of the distance between the dual-track co-facing assembly 40 and the top surface by adjusting the distance between the bolts and nuts (or the studs and nuts).

[0034] Specifically, the first finishing section 42 is a rigid irregular-shaped finishing panel, the top of which is welded and fixed to the connecting base plate 41. The hardness of the steel is used to forcefully scrape and initially level the concrete surface. The second finishing section 43 is an elastic irregular-shaped finishing panel to meet the flexibility, wear resistance, and pipe wall fit requirements of the finishing operation. The elastic irregular-shaped finishing panel is fixed to the bottom of the connecting base plate 41 (rear along the rotation direction) by adhesive bonding. In this embodiment, the elastic irregular-shaped finishing panel is an arc-shaped polyurethane (PU) finishing panel, used to utilize the flexibility of the PU material for fine pressing and final finishing, eliminating scratches and improving smoothness. It should be noted that, based on the differences in actual working scenarios and concrete characteristics, the elastic irregular-shaped finishing panel can also be made of equivalent elastic materials, including but not limited to: ① polyurethane elastomer derivatives with different hardness gradients; ② wear-resistant and anti-aging elastic materials such as nitrile rubber and silicone rubber; ③ modified elastic plastics such as TPEE that balance flexibility and structural strength.

[0035] like Figure 3As shown, the first and second finishing sections 42 and 43 are at the same angle θ to the connecting substrate, with the angle θ ranging from 90° to 135°. The first and second finishing sections 42 and 43 are arranged in parallel, with a spacing of 10 to 30 cm. See also Figure 3 During the operation, the first finishing section 42 is located at the front, and the first finishing section is performed first.

[0036] like Figure 2 As shown, both the rigid and elastic irregular shaped concrete lining panels include a main body 421 and wing plates 422 located at both ends of the main body. The wing plates 422 extend radially outward from the ends of the main body towards the working area, and the angle between the two wing plates 422 increases the further away from the main body 421 they are. This arrangement of the wing plates 422 not only helps to shrink the concrete at the top surface but also controls the extent of concrete splashing, facilitating cleanup.

[0037] The automatic finishing device 1 of this invention features a rotary drive unit 10 fixed to the center of the mold to provide rotational power, a telescopic operating arm assembly 20 adapted to different pipe diameters, and a height adjustment and quick-change assembly unit 30 integrated with a hydraulic cylinder to provide pressure. The finishing assembly is quickly replaced via bolt connections to accommodate different wall thicknesses. The dual-track collaborative finishing assembly 40 adopts a modular design of "steel-shaped leveling + flexible finishing," allowing for complete replacement. This automatic finishing device achieves full automation of the finishing operation on the top surface of pipe sections, offering advantages such as wide adaptability, high finishing quality, high efficiency, and convenient maintenance. It effectively solves the problems of high manual dependence, unstable quality, and poor equipment adaptability in existing technologies, making it particularly suitable for the production of large-diameter pipe sections.

[0038] It should be noted that the top surface of the pipe section refers to the exposed top surface of the pipe section, because before demolding, only the top surface of the pipe section is exposed, while the sides and bottom surfaces are enclosed by the mold. In this embodiment, the pipe section is annular, so the top surface is the annular top surface, as shown in the reference. Figure 4 .

[0039] Work process: like Figure 4 As shown, the present invention provides an automatic pipe section finishing device. Before use, the rotary drive unit 10 is first securely installed on the central shaft of the inner mold 3 of the pipe section 2 production mold via the mounting bracket 5. The pipe section 2 is cast between the inner mold 3 and the outer mold 4 in the figure. The top surface of the pipe section 2 is the part to be finished, which is the part to be finished by the device of the present invention. According to the outer diameter length of the pipe section 2 to be produced, the locking piece 23 is loosened, and the telescopic section 22 is pulled out to adjust the extension length of the operating arm so that the working surface of the finishing component 4 is roughly aligned with the outer surface of the pipe section 2. Then, the locking piece 23 is tightened again.

[0040] Subsequently, based on the wall thickness of pipe section 2, select a suitable size double-channel co-facing assembly 40. Align the mounting holes on the connecting base plate 41 above the assembly with the connecting holes on the fixing plate 32, and fasten them together using connecting bolts and nuts; alternatively, the studs on the connecting base plate 41 of the assembly can be passed through the connecting holes on the fixing plate 32 and fastened together using nuts.

[0041] The starting device activates the drive motor 11, which in turn drives the rotating base 12 to rotate. This, in turn, causes the telescopic boom assembly, the height adjustment and quick-change assembly 30, and the dual-track collaborative face-forming assembly 40 to rotate at a constant speed around the central axis of the pipe section 2. Simultaneously, the piston rod of the hydraulic cylinder 31 extends, providing appropriate and stable downward pressure to bring the rigid irregular-shaped face-forming panel into contact with the inner and outer molds of the pipe section.

[0042] During rotation, the rigid, irregularly shaped finishing panel at the front first scrapes and initially levels the not-fully-cured concrete surface. Then, the flexible, irregularly shaped finishing panel at the rear gently smooths and presses the leveled surface, completing the final finishing work and creating a smooth, dense surface. See also... Figure 4 In this embodiment, the device rotates clockwise.

[0043] When it is necessary to change the product specifications or when the finishing component is worn, simply retract the hydraulic cylinder 31, loosen and remove the connecting bolts and nuts, or loosen and remove the nuts, and the entire finishing component can be removed for replacement or maintenance. The operation is very simple and quick.

[0044] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An automatic dough-collecting device, characterized in that, include: Rotary drive unit (10); The telescopic boom assembly (20) is connected to the rotary drive unit (10) and rotates synchronously with the rotary drive unit (10); A height adjustment and component quick-change unit (30) is provided at the top of the telescopic boom assembly (20); The dual-track co-fading assembly (40) is detachably connected to the height adjustment and assembly quick-change unit (30).

2. The automatic dough collection device according to claim 1, characterized in that, The dual-track co-operated finishing assembly (40) is provided with a first finishing section (42) and a second finishing section (43) in sequence from front to back along the working direction. Both are fixed to the lower part of the connecting base plate (41). The upper end of the connecting base plate (41) and the height adjustment and assembly quick-change unit (30) are detachably connected.

3. The automatic dough collection device according to claim 2, characterized in that, The angle between the first finishing section (42), the second finishing section (43) and the connecting substrate is 90°~135°, and the first finishing section (42) and the second finishing section (43) are arranged in parallel.

4. The automatic dough-collecting device according to claim 3, characterized in that, The distance between the first finishing section (42) and the second finishing section (43) is 10 to 30 centimeters.

5. The automatic dough-collecting device according to claim 2, characterized in that, The first section (42) is a rigid irregular-shaped section panel, and the second section (43) is an elastic irregular-shaped section panel.

6. The automatic dough-collecting device according to claim 5, characterized in that, The first receiving section (42) and the second receiving section (43) both include a receiving panel body (421) and wing plates (422) located at both ends of the receiving panel body. The wing plates (422) are arranged to extend radially outward from the end of the receiving panel body towards the working area. The further away from the receiving panel body (421) the greater the angle between the two wing plates (422).

7. The automatic dough-collecting device according to claim 1, characterized in that, The rotary drive unit (10) includes a drive motor (11), a rotary base (12), and a positioning base (13). The positioning base is fixed to the center of the inner mold of the pipe section mold by a mounting bracket. The rotary base (12) is coaxially and rotatably connected to the positioning base. The drive motor (11) is fixed to the positioning base. The drive motor (1) is connected to the rotary base (12) through a gear transmission mechanism and drives the rotary base (12) to rotate around the axis.

8. The automatic dough-collecting device according to claim 1, characterized in that, The telescopic boom assembly (20) includes a fixed section (21) and a telescopic section (22). One end of the fixed section (21) is fixedly connected to the rotary drive unit (1). The telescopic section (22) is nested inside the fixed section (21) and can extend and retract axially. A locking element (23) is provided at the connection between the fixed section (21) and the telescopic section (22).

9. The automatic dough-collecting device according to claim 1, characterized in that, The height adjustment and component quick-change unit (30) is connected to the free end of the telescopic section (22), and a hydraulic cylinder (31) is provided on its top. A fixed plate (32) is connected to the lower end of the hydraulic cylinder (31). The double-track co-operating surface finishing component (4) is detachably installed below the fixed plate (32) by bolts (33).

10. The automatic dough-collecting device according to claim 1, characterized in that, The dual-path collaborative finishing component (40) is a serialized design and comes in a variety of different sizes.

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