Prestressed concrete hollow square pile surface treatment device

Abstract

This utility model relates to a surface treatment device for prestressed concrete hollow square piles, comprising a suspension limiting mechanism and a lever mechanism disposed on one side of the suspension limiting mechanism. The suspension limiting mechanism includes a limiting base assembly and two rotating rollers. The limiting base assembly includes several limiting bases arranged in parallel, with the top surfaces of the limiting bases cooperating to form a square pile limiting groove that matches the square pile. The lever mechanism includes a fixed base, a swing arm, a sleeve, and a lever. The swing arm is driven to rotate around the central axis of a first rotating shaft by a first rotary drive component. The lever is disposed on the side of the swing arm near the suspension limiting mechanism and is movably connected to the swing arm via a sliding rod. The swing arm has a groove for the sliding rod to enter and move. The sliding rod moves movably through the groove and is driven to move along the groove by a first linear drive component. The surface treatment device of this utility model achieves smooth rotation of the pile body, reduces the requirements for the power drive component, reduces energy consumption, and exposes the entire surface of the pile body, facilitating surface inspection and treatment.

Description

Technical Field

[0001] This utility model relates to the field of concrete hollow square pile production technology, and in particular to a surface treatment device for prestressed concrete hollow square piles. Background Technology

[0002] Hollow concrete square piles are slender precast pile foundation components with square cross-sections and hollow interiors, made primarily of high-strength concrete and prestressed steel bars through industrialized prefabrication processes. They are mainly used for foundation support in engineering projects such as buildings, bridges, and ports, with a single section typically ranging from 7 to 30 meters in length.

[0003] Hollow concrete square piles are typically manufactured using a centrifugal molding method. First, high-strength steel bars are prestressed on a specialized platform and fixed to the anchor holes in the end plates to form a steel cage. This cage is then placed in a square steel mold, into which concrete is poured. The mold is rotated at high speed, and centrifugal force causes the concrete to compact evenly, forming a hollow structure. After centrifugation, the pile is demolded. The surface of the hollow concrete square pile is then inspected for defects and surface treatment is performed. Latex and oil stains are cleaned from the welded areas of the end plates to ensure a clean interface between the end plates and the concrete. Local defects on the sides, such as honeycombing and cracks, are addressed using high-strength repair mortar to fill them and prevent them from affecting the pile's durability.

[0004] Currently, there are three methods for surface inspection and treatment of hollow concrete square piles. The first method involves lifting and flipping the pile body using a hoisting method. This process is not only cumbersome, but also prone to swaying, posing a significant risk and resulting in low efficiency. The second method uses two rotating rollers inserted into the pile body, driven by a rotary motor. This method requires a high-output motor, which is typically large and occupies a large area. Furthermore, due to the long length of the pile, the rotation of the pile body by the rollers generates significant inertial forces, causing torque fluctuations and leading to defects such as slippage, bearing damage, short motor life, and slow start-up speed. The third method uses clamps fitted onto the side of the pile body, and then drives the pile body to rotate by driving the clamps. However, the installation of the clamps obstructs parts of the pile body's side, preventing proper inspection and treatment of the obstructed areas, resulting in poor surface treatment effects.

[0005] Therefore, this utility model proposes a surface treatment device for prestressed concrete hollow square piles to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a surface treatment device for prestressed concrete hollow square piles, which enables the pile body to rotate smoothly, reduces the requirements for power drive components, reduces energy consumption, and exposes the entire surface of the pile body, facilitating surface inspection and treatment.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a surface treatment device for prestressed concrete hollow square piles, wherein the square pile has an internally hollow quadrangular prism structure, and the outline of the radial section of the square pile includes a concentrically arranged square outer outline and a circular inner outline, wherein the four corners of the square outer outline are vertices. The innovation is that the surface treatment device includes a suspension limiting mechanism and a lever mechanism disposed on one side of the suspension limiting mechanism.

[0008] The suspension limiting mechanism includes a limiting base group and two rotating rollers. The limiting base group includes several limiting bases arranged in parallel. The top surfaces of the several limiting bases cooperate to form a square pile limiting groove that matches the square pile. The two rotating rollers are respectively rotatably installed on two limiting bases at the two sides of the limiting base group. The limiting bases on which the rotating rollers are installed are pushed to move horizontally by a screw drive assembly to adjust the distance between the two rotating rollers. The square pile is set in the square pile limiting groove. The two rotating rollers extend into the square pile and suspend the square pile on the two rotating rollers. The central axis of the square pile and the central axis of the square pile limiting groove are on the same straight line.

[0009] The lever mechanism includes a fixed base, a swing arm, a sleeve, and a lever. One end of the swing arm is rotatably mounted on the fixed base via a first rotating shaft. The central axis of the first rotating shaft is horizontally positioned and parallel to the central axis of the square pile limiting groove. The swing arm is driven to rotate around the central axis of the first rotating shaft by a first rotary drive component. The lever is located on the side of the swing arm near the suspension limiting mechanism and is movably connected to the swing arm via a sliding rod. The swing arm has a groove for the sliding rod to enter and move. The extension direction of the groove is located in the radial direction of the first rotating shaft. The sliding rod moves through the groove and is driven by a first linear drive component. The moving part drives the slide along the groove. The central axis of the slide rod is parallel to the central axis of the first rotating shaft. The tail end of the lever is rotatably and coaxially sleeved on the outside of the slide rod. The sleeve is rotatably mounted on the fixed seat through the second rotating shaft. The central axis of the second rotating shaft is parallel to the central axis of the first rotating shaft. The central axis of the sleeve is perpendicular to the central axis of the second rotating shaft. The middle part of the lever is movably and coaxially inserted into the sleeve. The first rotary drive and the first linear drive cooperate to make the slide rod move along the movement trajectory, driving the front end of the lever to rotate downward from the starting position to the end position and then return to the starting position.

[0010] Furthermore, when the square pile rotates to the end position, the angle between the line connecting the vertex of the square pile and the center of the square pile and the vertical plane passing through the central axis of the square pile is less than 45 degrees.

[0011] When two of the vertices of a square stake are on the same vertical line and the other two vertices are on the same horizontal line, the position of one of the vertices on the same horizontal line is the starting position.

[0012] Furthermore, the radial cross-section of the square pile limiting groove includes an outer arc segment that matches the square outer contour of the square pile and two vertical line segments. The two ends of the outer arc segment are on the same horizontal line as the center of the outer circle. The two vertical line segments are set above the outer arc segment and are respectively connected to the two ends of the outer arc segment. The center of the outer circle of the outer arc segment is the center of the square pile limiting groove.

[0013] Furthermore, the front end of the lever is provided with a vertex connector, which has a right-angle groove that matches the structure at the vertex of the square pile, and the vertex connector is rotatably connected to the front end of the lever.

[0014] Furthermore, the movement trajectory includes a first connection point, a second connection point, a third connection point, a fourth connection point, and a fifth connection point;

[0015] The fifth connection point is connected to the first connection point through the first straight line segment, and the first straight line segment is on the same horizontal line as the central axis of the slide rod and the center of the square pile limiting groove. When the slide rod moves from the fifth connection point to the first connection point along the first straight line segment, the vertex connector at the front end of the lever moves from the waiting position to the initial position and approaches the square pile, so that the vertex of the square pile at the initial position enters the right-angle groove of the vertex connector, and the vertex connector is connected to the vertex of the square pile at the initial position.

[0016] The first connection point is connected to the second connection point through the first arc segment. When the slide bar moves from the first connection point to the second connection point along the first arc segment, the vertex connector at the front end of the lever pushes the vertex of the square pile to rotate downward to the end position.

[0017] The second connection point is connected to the third connection point through the second arc segment. When the slide bar moves from the second connection point to the third connection point along the second arc segment, the vertex connector at the front end of the lever moves away from the vertex of the square pile and moves the vertex of the square pile away from the right-angle groove of the vertex connector, thus unlocking the vertex connector from the vertex of the square pile.

[0018] The third connection point is connected to the fourth connection point through the second straight line segment. When the slide rod moves from the third connection point to the fourth connection point along the second straight line segment, the top connector of the front end of the lever moves upward and continues to move away from the square pile, leaving space for the square pile to rotate.

[0019] The fourth connection point is connected to the fifth connection point through the third arc segment. When the slide bar moves from the fourth connection point to the fifth connection point along the third arc segment, the vertex connector at the front end of the lever moves to the waiting position.

[0020] Furthermore, the bottom of the front end of the lever has a first limiting block, which is located on the trajectory of the downward rotation of the vertex connector. When the slider moves along the second straight segment and the vertex connector at the front end of the lever moves upward at an angle, the vertex connector rotates downward under its own gravity and abuts against the first limiting block. At this time, the central axis of the lever and the bisector of the right angle groove of the vertex connector are on the same straight line.

[0021] Furthermore, the fixed base has a receiving groove for installing the swing arm, the swing arm is installed in the receiving groove, and the side walls of the receiving groove have track grooves that match the movement trajectory. Rollers are rotatably installed at both ends of the slide rod, the rollers are set in the track groove on the same side, and move along the track groove as the slide rod moves.

[0022] Furthermore, the radial cross-section of the lever has an oblong shape, and the outline of the radial cross-section of the lever has several outwardly protruding arc segments arranged at intervals, with lubrication grooves formed between adjacent arc segments.

[0023] Furthermore, the suspension limiting mechanism also includes a second limiting block, which is movably mounted on the fixed base and driven to move up and down into or away from the square pile limiting groove by a second linear drive. The top of the second limiting block has an anti-rotation limiting groove for the top of the square pile to enter.

[0024] The advantages of this utility model are:

[0025] This invention's surface treatment device cleverly utilizes the structural features of a hollow square pile with an outer square and inner round shape. A rotating roller suspends and supports the prestressed concrete hollow square pile. Then, a lever is used to apply radial force to the pile, causing it to rotate a certain angle. The pile continues to rotate downwards under its own weight until its center of gravity stabilizes. Each 90° rotation effectively reduces the requirements for the rotating drive components, minimizing energy consumption. Furthermore, with repeated rotations, the sides and ends of the pile are sequentially exposed. Operators can then inspect and treat the exposed sides and ends in turn. The operation is convenient, time-saving, and labor-saving.

[0026] The surface treatment device of this utility model uses a rotating roller to suspend and support the square pile. When the square pile rotates, the rotating roller rotates accordingly, which effectively reduces the scratches and wear on the inner surface of the square pile. In conjunction with the limiting base, it effectively prevents the square pile from shaking or accidentally disengaging from the lever, so that the square pile can rotate smoothly around the axis.

[0027] The surface treatment device of this utility model optimizes the movement and displacement of the slide rod by cooperating with the swing rod, the slide rod, the sleeve, the first rotary drive component and the first linear drive component. This allows the lever to move and reset in an orderly manner after the square pile is rotated, waiting for the next rotation of the square pile. The structure is simple, not easily damaged, and realizes automated operation. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a layout diagram of the surface treatment device of this utility model.

[0030] Figure 2 This is a schematic diagram of the limiting base for mounting the rotating roller according to this utility model.

[0031] Figure 3 This is a cross-sectional view of the limiting base for mounting the rotating roller of this utility model.

[0032] Figure 4 This is a schematic diagram of the lever mechanism of this utility model.

[0033] Figure 5 This is a cross-sectional view of the lever mechanism of this utility model at point AA.

[0034] Figure 6 This is a cross-sectional view of the lever structure at point BB of this utility model.

[0035] Figure 7 This is a cross-sectional view of the lever mechanism of this utility model at point CC.

[0036] Figure 8 This is a radial cross-sectional view of the lever of this utility model.

[0037] Figure 9 This is a schematic diagram of the movement trajectory of the slide bar of this utility model.

[0038] Figure 10 This is a schematic diagram of the lever mechanism of this utility model that drives the square pile to rotate. Detailed Implementation

[0039] To further illustrate the technical means and effects of this utility model in order to achieve its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0040] Example

[0041] The prestressed concrete hollow square pile 1 has an internally hollow quadrangular prism structure. The outline of the radial section of the square pile 1 includes a concentrically arranged square outer outline and a circular inner outline, with the four corners of the square outer outline being vertices.

[0042] This embodiment provides a surface treatment device for the above-mentioned prestressed concrete hollow square pile 1, including a suspension limiting mechanism 2 and a lever 306 mechanism 3 disposed on one side of the suspension limiting mechanism 2.

[0043] The suspension limiting mechanism 2 includes a limiting base assembly and two rotating rollers 202. The limiting base assembly includes several limiting bases 201 arranged in parallel. The top surfaces of the limiting bases 201 cooperate to form a square pile limiting groove 203 that matches the square pile 1. The radial cross-section of the square pile limiting groove 203 includes an outer arc segment 203a that matches the outer outline of the square of the square pile 1 and two vertical straight segments 203b. The two ends of the outer arc segment 203a are on the same horizontal line as the center of the outer circle. The two vertical straight segments 203b are arranged above the outer arc segment 203a and are respectively connected to the two ends of the outer arc segment 203a. The center of the outer circle of the outer arc segment 203a is the center of the square pile limiting groove 203.

[0044] Two rotating rollers 202 are rotatably mounted on two limiting bases 201 located on the two sides of the limiting base assembly. The square pile limiting groove 203 of the limiting base 201 protrudes upwards on its bottom surface to form a vertically mounted section on the column 204. The rotating rollers 202 are rotatably mounted on the side wall of the column 204, with the central axis of the rotating rollers 202 and the central axis of the square pile limiting groove 203 on the same vertical plane. One of the limiting bases 201 on which the rotating rollers 202 are mounted is driven horizontally by a screw 206 drive assembly to adjust the distance between the two rotating rollers 202. The screw 206 drive assembly includes a first guide rail 205 and a screw 206, which are located below the limiting base 201. The limiting base 201 is slidably mounted on the first guide rail 205 via a first slider and threadedly connected to the screw 206 via a nut. The screw 206 is driven to rotate by a second rotary drive component 207, and the nut drives the limiting base 201 to move along the first guide rail 205. The square pile 1 is set inside the square pile limiting groove 203. Two rotating rollers 202 extend into the square pile 1 and suspend the square pile 1 on the two rotating rollers 202. At this time, the central axis of the square pile 1 and the central axis of the square pile limiting groove 203 are in the same straight line.

[0045] In this embodiment, the suspension limiting mechanism 2 further includes a second limiting block 208. The second limiting block 208 is movably mounted on the limiting base 201 via a guide rail assembly and is driven to move up and down into or away from the square pile limiting groove 203 by a second linear drive member 2011. The top of the second limiting block 208 has an anti-rotation limiting groove for the vertex of the square pile 1 to enter. The guide rail assembly includes a second guide rail 2010 and a second slider 209. The second guide rail 2010 is vertically mounted on the side wall of the limiting base 201, and the second slider 209 is slidably mounted on the second guide rail 2010. The second limiting block 208 is mounted on the top of the second slider 209, and the second linear drive member 2011 is mounted on the limiting base 201. The telescopic end of the second linear drive member 2011 is connected to the second slider 209, pushing the second slider 209 to move along the second guide rail 2010.

[0046] The lever 306 mechanism 3 includes a fixed base 301, a rocker arm 302, a sleeve 307, and a lever 306. The fixed base 301 is located on one side of the limiting base assembly in the radial direction. The fixed base 301 has a receiving groove 3011 for mounting the rocker arm 302. The rocker arm 302 is installed in the receiving groove 3011. One end of the rocker arm 302 is rotatably mounted on the fixed base 301 via a first rotating shaft 3022. The central axis of the first rotating shaft 3022 is horizontally set and parallel to the central axis of the square pile limiting groove 203. The rocker arm 302 is driven to rotate around the central axis of the first rotating shaft 3022 by a first rotating drive member 305. The first rotating drive member 305 is installed on the outside of the fixed base 301, and the rotating end of the first rotating drive member 305 passes through the fixed base 301 and is connected to the first rotating shaft 3022.

[0047] A lever 306 is disposed within the receiving groove 3011 on the side of the swing arm 302 near the suspension limiting mechanism 2, and is movably connected to the swing arm 302 via a slide rod 303. The central axis of the lever 306 is perpendicular to the central axis of the first rotating shaft 3022. A groove 3021 is provided on the swing arm 302 for the slide rod 303 to enter and move. The extension direction of the groove 3021 is located in the radial direction of the first rotating shaft 3022. The slide rod 303 is movably inserted into the groove 3021 and is driven to move along the groove 3021 by the first linear drive member 304. The central axis of the slide rod 303 is... The line is parallel to the central axis of the first rotating shaft 3022. The tail end of the lever 306 is rotatably and coaxially sleeved on the outside of the slide rod 303 through two parallel connecting plates 3063. The two connecting plates 3063 are integrally formed with the tail end of the lever 306. The two connecting plates 3063 are respectively set on both sides of the swing rod 302 and rotatably sleeved on the slide rod 303. There are two first linear drive members 304, which are respectively installed on both sides of the swing rod 302. The telescopic end of the first linear drive member 304 is connected to the side of the connecting plate 3063 on the slide rod 303 away from the swing rod 302.

[0048] In this embodiment, in order to improve the stability of the movement of the slide bar 303, the side walls of the receiving groove 3011 are provided with track grooves 3012 that match the movement trajectory L. Rollers 3031 are rotatably installed at both ends of the slide bar 303. The rollers 3031 are set in the track grooves 3012 on the same side and move along the track grooves 3012 as the slide bar 303 moves.

[0049] The sleeve 307 is rotatably mounted on the fixed base 301 via the second rotating shaft 3071. The central axis of the second rotating shaft 3071 is parallel to the central axis of the first rotating shaft 3022, and the central axis of the sleeve 307 is perpendicular to the central axis of the second rotating shaft 3071. The middle part of the lever 306 is movably coaxially inserted into the sleeve 307. In this embodiment, the sleeve 307 has a waist-shaped hole in the middle for the lever 306 to pass through. The radial cross-section of the lever 306 has a waist-shaped structure, and the outline of the radial cross-section of the lever 306 has several outwardly protruding arc segments 306a arranged at intervals. A trumpet-shaped lubrication groove 306b is formed between adjacent arc segments 306a. The lever 306 passes through the waist-shaped hole of the sleeve 307, and each arc segment 306a forms a linear sliding connection with the inner wall of the sleeve 307. This improves the structural strength of the lever 306 and reduces the friction between the lever 306 and the sleeve 307. At the same time, lubricant is applied to the lubrication groove 306b during use, which further reduces the frictional resistance and makes the movement of the lever 306 smoother. Through the coordinated action of the first rotary drive member 305 and the first linear drive member 304, the slide bar 303 moves along the movement trajectory L, driving the front end of the lever 306 to rotate downward from the starting position to the end position and then return to the starting position.

[0050] When the square pile 1 rotates to the end position, the angle between the line connecting the vertex of the square pile 1 and the center of the square pile 1 and the vertical plane passing through the central axis of the square pile 1 is less than 45 degrees, preferably 30 degrees; when the center of gravity of the square pile 1 is stable, two of the vertices of the square pile 1 in relative positions are on the same vertical line, and the other two vertices in relative positions are on the same horizontal line. The position of one of the vertices on the same horizontal line is the starting position.

[0051] To enable the lever 306 to rotate the vertex of the square pile 1 and facilitate the connection and unlocking between the lever 306 and the vertex of the square pile 1, a vertex connector 3061 is provided at the front end of the lever 306. The vertex connector 3061 has a right-angle groove that matches the structure at the vertex of the square pile 1. The vertex connector 3061 is rotatably connected to the front end of the lever 306.

[0052] In this embodiment, the movement trajectory L includes a first connection point L1, a second connection point L2, a third connection point L3, a fourth connection point L4, and a fifth connection point L5, wherein:

[0053] The fifth connection point L5 is located on the side of the first connection point L1 away from the suspension limiting mechanism 2, and is connected to the first connection point L1 through the first straight line segment. The first straight line segment is on the same horizontal line as the central axis of the slide rod 303 and the center of the square pile limiting groove 203. When the slide rod 303 moves from the fifth connection point L5 to the first connection point L1 along the first straight line segment, the vertex connector 3061 at the front end of the lever 306 moves from the waiting position to the initial position and approaches the square pile 1, so that the vertex of the square pile 1 at the initial position enters the right angle groove of the vertex connector 3061, and the vertex connector 3061 is connected to the vertex of the square pile 1 at the initial position.

[0054] The first connection point L1 is connected to the second connection point L2 through the first arc segment. The first arc segment bends upward and then downward from the first connection point L1 in the direction closer to the suspension limiting mechanism 2. When the slide rod 303 moves from the first connection point L1 along the first arc segment to the second connection point L2, the vertex connector 3061 at the front end of the lever 306 pushes the vertex of the square pile 1 to rotate downward to the end position.

[0055] The second connection point L2 is connected to the third connection point L3 through the second arc segment. The second arc segment bends upward and then downward from the second connection point L2 in the direction closer to the suspension limiting mechanism 2. When the slide bar 303 moves from the second connection point L2 along the second arc segment to the third connection point L3, the vertex connector 3061 at the front end of the lever 306 moves away from the vertex of the square pile 1 and makes the vertex of the square pile 1 move away from the right angle groove of the vertex connector 3061, and the vertex connector 3061 is unlocked from the vertex of the square pile 1.

[0056] The third connection point L3 is connected to the fourth connection point L4 via a second straight line segment. The second straight line segment slopes upwards from the third connection point L3 in a direction away from the suspension limiting mechanism 2. When the sliding rod 303 moves from the third connection point L3 to the fourth connection point L4 along the second straight line segment, the front vertex connector 3061 of the lever 306 slopes upwards and continues to move away from the square pile 1, leaving space for the square pile 1 to rotate. In this embodiment, to facilitate the reset of the vertex connector 3061 after the square pile 1 has rotated, and to facilitate the next vertex of the square pile 1... The lever 306 enters the right-angle groove of the vertex connector 3061. The bottom of the front end of the lever 306 has a first limiting block 3062. The first limiting block 3062 is located on the trajectory of the downward rotation of the vertex connector 3061. When the slider 303 moves along the second straight segment, the vertex connector 3061 at the front end of the lever 306 moves upward at an angle. Under its own gravity, the vertex connector 3061 rotates downward and abuts against the first limiting block 3062. At this time, the central axis of the lever 306 and the angle bisector of the right-angle groove of the vertex connector 3061 are on the same straight line.

[0057] The fourth connection point L4 is connected to the fifth connection point L5 through the third arc segment. The third arc segment bends downward from the fourth connection point L4 in a direction away from the suspension limiting mechanism 2. There is a distance between the third arc segment and the first arc segment. During this stage of movement, it is ensured that the vertex connector 3061 at the front end of the lever 306 will not collide with the square pile 1. When the slide bar 303 moves from the fourth connection point L4 along the third arc segment to the fifth connection point L5, the vertex connector 3061 at the front end of the lever 306 moves to the waiting position.

[0058] The operation steps of the above-mentioned surface treatment apparatus include:

[0059] Step 1, Suspending square pile 1: Arrange the limiting base group according to the length of square pile 1. Place the two limiting bases 201 with rotating rollers 202 on both sides of the limiting base group. Use hoisting equipment to lift square pile 1 horizontally above the limiting bases 201. The two rotating rollers 202 extend into the square pile 1 from both ends and suspend square pile 1 on the two rotating rollers 202. When square pile 1 rotates to a stable center of gravity, square pile 1 is released.

[0060] Step 2, Rotating the square pile 1: The first rotary drive 305 and the first linear drive 304 are activated. The slide bar 303 moves from the fifth connection point L5 along the first straight segment and the first arc segment to the second connection point L2. The vertex connector 3061 at the front end of the lever 306 connects to the vertex of the square pile 1 at its initial position and pushes the vertex of the square pile 1 to rotate downward to the end position. The slide bar 303 moves from the second connection point L2 along the second arc segment to the third connection point L3. The vertex connector 3061 is unlocked from the vertex of the square pile 1. The square pile 1 continues to rotate downward under its own gravity, so that the vertex of the square pile 1 moves to the lowest point and reaches a stable center of gravity.

[0061] Step 3, Surface inspection and treatment of square pile 1: The second limiting block 208 moves upward, so that the bottom apex of square pile 1 enters the anti-rotation limiting groove of the second limiting block 208 to temporarily fix square pile 1. Then, the surface of square pile 1 on the side facing upward away from lever 306 and the exposed end face are inspected and treated. During this process, the sliding rod 303 returns from the third connection point L3 along the second straight segment and the third arc segment to the fifth connection point L5. After the surface inspection and treatment is completed, the second limiting block 208 moves downward, square pile 1 is removed from the anti-rotation limiting groove, and the temporary fixation is canceled.

[0062] Step 4, Surface treatment complete: Repeat steps 2 and 3 until all sides and end faces of square pile 1 have been inspected and treated.

[0063] The surface treatment device in this embodiment cleverly utilizes the structural features of the hollow square pile 1, which is square on the outside and round on the inside. By suspending and supporting the prestressed concrete hollow square pile 1, and then using a lever 306 as a lever to apply radial force to the square pile 1 to rotate it a certain angle, the square pile 1 continues to rotate downward under its own weight until the center of gravity is stable. The square pile 1 rotates 90° at a fixed angle once, which effectively reduces the requirements for the rotation drive components and reduces energy consumption. As the square pile 1 rotates multiple times, the side and end faces of the square pile 1 are exposed in sequence. The operator can then inspect and process the upward-facing side and the exposed end faces in sequence, which is convenient, time-saving and labor-saving.

[0064] The surface treatment device in this embodiment utilizes a rotating roller 202 to suspend and support the square pile 1. When the square pile 1 rotates, the rotating roller 202 rotates accordingly, effectively reducing scratches and wear on the inner surface of the square pile 1. In conjunction with the limiting base 201, it effectively prevents the square pile 1 from wobbling or accidentally disengaging from the lever 306, ensuring the square pile 1 rotates smoothly around its axis. Furthermore, through the cooperation of the swing rod 302, slide rod 303, sleeve 307, first rotary drive component 305, and first linear drive component 304, the movement displacement of the slide rod 303 is optimized, allowing the lever 306 to move the square pile 1 in an orderly manner to reset after rotation, awaiting the next rotation of the square pile 1. The structure is simple, not easily damaged, and achieves automated operation.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A surface treatment device for prestressed concrete hollow square piles, wherein the square pile has an internally hollow quadrangular prism structure, and the outline of the radial section of the square pile includes a concentrically arranged square outer outline and a circular inner outline, wherein the four corner endpoints of the square outer outline are vertices, characterized in that: The surface treatment device includes a suspension limiting mechanism and a lever mechanism disposed on one side of the suspension limiting mechanism; The suspension limiting mechanism includes a limiting base group and two rotating rollers. The limiting base group includes several limiting bases arranged in parallel. The top surfaces of the several limiting bases cooperate to form a square pile limiting groove that matches the square pile. The two rotating rollers are respectively rotatably installed on two limiting bases at the two sides of the limiting base group. The limiting bases on which the rotating rollers are installed are pushed to move horizontally by a screw drive assembly to adjust the distance between the two rotating rollers. The square pile is set in the square pile limiting groove. The two rotating rollers extend into the square pile and suspend the square pile on the two rotating rollers. The central axis of the square pile and the central axis of the square pile limiting groove are on the same straight line. The lever mechanism includes a fixed base, a swing arm, a sleeve, and a lever. One end of the swing arm is rotatably mounted on the fixed base via a first rotating shaft. The central axis of the first rotating shaft is horizontally positioned and parallel to the central axis of the square pile limiting groove. The swing arm is driven to rotate around the central axis of the first rotating shaft by a first rotary drive component. The lever is located on the side of the swing arm near the suspension limiting mechanism and is movably connected to the swing arm via a sliding rod. The swing arm has a groove for the sliding rod to enter and move. The extension direction of the groove is located in the radial direction of the first rotating shaft. The sliding rod moves through the groove and is driven by a first linear drive component. The moving part drives the slide along the groove. The central axis of the slide rod is parallel to the central axis of the first rotating shaft. The tail end of the lever is rotatably and coaxially sleeved on the outside of the slide rod. The sleeve is rotatably mounted on the fixed seat through the second rotating shaft. The central axis of the second rotating shaft is parallel to the central axis of the first rotating shaft. The central axis of the sleeve is perpendicular to the central axis of the second rotating shaft. The middle part of the lever is movably and coaxially inserted into the sleeve. The first rotary drive and the first linear drive cooperate to make the slide rod move along the movement trajectory, driving the front end of the lever to rotate downward from the starting position to the end position and then return to the starting position.

2. The surface treatment device for prestressed concrete hollow square piles according to claim 1, characterized in that: When the square pile is rotated to the end position, the angle between the line connecting the vertex of the square pile and the center of the square pile and the vertical plane passing through the central axis of the square pile is less than 45 degrees. When two of the vertices of a square stake are on the same vertical line and the other two vertices are on the same horizontal line, the position of one of the vertices on the same horizontal line is the starting position.

3. The surface treatment device for prestressed concrete hollow square piles according to claim 2, characterized in that: The radial section of the square pile limiting groove includes an outer arc segment that matches the square outer contour of the square pile and two vertical line segments. The two ends of the outer arc segment are on the same horizontal line as the center of the outer circle. The two vertical line segments are set above the outer arc segment and are connected to the two ends of the outer arc segment respectively. The center of the outer circle of the outer arc segment is the center of the square pile limiting groove.

4. The surface treatment device for prestressed concrete hollow square piles according to claim 3, characterized in that: The lever has a vertex connector at its front end. The vertex connector has a right-angle groove that matches the structure at the vertex of the square pile. The vertex connector is rotatably connected to the front end of the lever.

5. The surface treatment device for prestressed concrete hollow square piles according to claim 4, characterized in that: The movement trajectory includes a first connection point, a second connection point, a third connection point, a fourth connection point, and a fifth connection point; The fifth connection point is connected to the first connection point through the first straight line segment, and the first straight line segment is on the same horizontal line as the central axis of the slide rod and the center of the square pile limiting groove. When the slide rod moves from the fifth connection point to the first connection point along the first straight line segment, the vertex connector at the front end of the lever moves from the waiting position to the initial position and approaches the square pile, so that the vertex of the square pile at the initial position enters the right-angle groove of the vertex connector, and the vertex connector is connected to the vertex of the square pile at the initial position. The first connection point is connected to the second connection point through the first arc segment. When the slide bar moves from the first connection point to the second connection point along the first arc segment, the vertex connector at the front end of the lever pushes the vertex of the square pile to rotate downward to the end position. The second connection point is connected to the third connection point through the second arc segment. When the slide bar moves from the second connection point to the third connection point along the second arc segment, the vertex connector at the front end of the lever moves away from the vertex of the square pile and moves the vertex of the square pile away from the right-angle groove of the vertex connector, thus unlocking the vertex connector from the vertex of the square pile. The third connection point is connected to the fourth connection point through the second straight line segment. When the slide rod moves from the third connection point to the fourth connection point along the second straight line segment, the top connector of the front end of the lever moves upward and continues to move away from the square pile, leaving space for the square pile to rotate. The fourth connection point is connected to the fifth connection point through the third arc segment. When the slide bar moves from the fourth connection point to the fifth connection point along the third arc segment, the vertex connector at the front end of the lever moves to the waiting position.

6. The surface treatment device for prestressed concrete hollow square piles according to claim 5, characterized in that: The front end of the lever has a first limiting block at the bottom. The first limiting block is located on the trajectory of the downward rotation of the vertex connector. When the slider moves along the second straight segment and the vertex connector at the front end of the lever moves upward at an angle, the vertex connector rotates downward under its own gravity and abuts against the first limiting block. At this time, the central axis of the lever and the bisector of the right angle groove of the vertex connector are on the same straight line.

7. The surface treatment device for prestressed concrete hollow square piles according to claim 6, characterized in that: The fixed base has a receiving groove for installing the swing arm. The swing arm is installed in the receiving groove. The side walls of the receiving groove have track grooves that match the movement trajectory. Rollers are rotatably installed at both ends of the slide rod. The rollers are set in the track grooves on the same side and move along the track grooves as the slide rod moves.

8. The surface treatment device for prestressed concrete hollow square piles according to claim 7, characterized in that: The radial cross-section of the lever has an oblong shape, and the outline of the radial cross-section of the lever has several outwardly protruding arc segments arranged at intervals, with lubrication grooves formed between adjacent arc segments.

9. The surface treatment device for prestressed concrete hollow square piles according to claim 8, characterized in that: The suspension limiting mechanism also includes a second limiting block, which is movably mounted on the fixed base and driven to move up and down into or away from the square pile limiting groove by a second linear drive. The top of the second limiting block has an anti-rotation limiting groove for the top of the square pile to enter.

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