Cement pile head ring cutting device

Abstract

This invention discloses a cement pile head circumferential cutting device, comprising: a positioning unit including a lower support ring supported on the foundation, and a clamping mechanism disposed on the lower support ring for surrounding and coaxially positioning the cement pile body; and a circumferential cutting unit including a guide mechanism fixedly connected above the clamping mechanism, and a circumferential cutting mechanism slidably disposed on the guide mechanism for circumferentially cutting the cement pile body; wherein, the clamping mechanism includes multiple fixed frames distributed circumferentially, and a push block is slidably disposed in each fixed frame. By setting an adjustment mechanism composed of a rotating ring, a fixed rod, and a top wheel, in cooperation with the push block with an inclined surface, single-handed operation can be achieved, that is, multiple clamping points can be simultaneously driven to move towards the center of the cement pile body, quickly completing coaxial positioning, ensuring that the circumferential cutting trajectory is highly coincident with the pile axis, and effectively avoiding the problem of excessive load or damage to the cutting machine caused by eccentric cutting.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a device for circumferential cutting of cement pile heads. Background Technology

[0002] In pile foundation engineering, concrete piles are usually formed by drilling, squeezing soil with steel pipes or excavating manually, and then placing a steel cage in the hole and pouring concrete. In order to ensure that the concrete strength of the pile head meets the design requirements, a certain amount of over-pouring needs to be reserved during construction. This is because after the concrete is vibrated, the aggregate sinks and there is a lot of floating slurry on the top, which is insufficient in bearing capacity and needs to be removed in subsequent processes. Currently, concrete pile heads are mostly removed using high-frequency vibration chisels driven by pneumatic picks. This traditional method has the following drawbacks: First, the effective area of ​​the impact drill is limited, requiring repeated operations when dealing with large-diameter pile heads, resulting in low removal efficiency. Second, impact chiseling easily creates uneven chisel marks on the pile head surface, affecting the flatness of the pile top and thus adversely affecting the pile quality and subsequent construction. In addition, although a few existing methods use circumferential cutting to cut pile heads, there is a coaxiality difference in circumferential cutting positioning, making it difficult for the axis of the cutting machine's rotation trajectory around the pile head to be on the same vertical axis as the axis of the pile head, which can easily damage the cutting machine.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a cement pile head circumferential cutting device to solve the problem mentioned in the background art that the cement pile head is removed by impact chiseling with a pneumatic hammer, which has low chiseling efficiency and affects the flatness of the pile top, which has an adverse effect on subsequent construction. In addition, the existing circumferential cutting method has the problem that the axis of the cutting rotation trajectory of the cutting machine is difficult to be perpendicular to the axis of the pile head, which easily damages the cutting machine.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A cement pile head circumferential cutting device, comprising: The positioning unit includes a lower support ring supported on the foundation, and a clamping mechanism disposed on the lower support ring for surrounding the cement pile body and coaxially positioning it. The circumferential cutting unit includes a guide mechanism fixedly connected above the clamping mechanism, and a circumferential cutting mechanism slidably disposed on the guide mechanism for circumferentially cutting the cement pile body. The clamping mechanism includes multiple fixed frames distributed circumferentially, and a push block is slidably arranged in each fixed frame. The push block is connected to a top plate on the side close to the cement pile body, and has an inclined surface on the side away from the cement pile body. The positioning unit also includes an adjustment mechanism rotatably mounted on the lower support ring. The adjustment mechanism is provided with a jacking part corresponding to the inclined surface. By operating the adjustment mechanism, the jacking part is driven to slide along the inclined surface to simultaneously push multiple jacking blocks to move the top plate toward the cement pile body and clamp it.

[0006] Furthermore, the adjustment mechanism includes a rotating ring rotatably disposed within the fixed frame, a push-pull rod fixedly connected to the outside of the rotating ring, and a plurality of fixed rods evenly connected to the inside of the rotating ring along the circumference. The end of each of the fixed rods is rotatably connected to the pusher.

[0007] Furthermore, the pushing part is a top wheel.

[0008] Furthermore, guide plates are fixedly connected to the upper and lower sides of the inclined surface of the push block respectively; The fixed frame is provided with a limiting groove that slides with the guide plate.

[0009] Furthermore, the clamping mechanism also includes a locking component, which includes a screw threaded to the top of the fixing frame; The guide plate at the top of the push block has a guide groove for the screw to pass through; The upper end of the fixing frame, located outside the screw, has a threaded hole. Tightening the screw will cause its lower end to press against the rotating ring.

[0010] Furthermore, a return spring is provided between the push block and the inner wall of the fixed frame.

[0011] Furthermore, the pusher block is connected to the top plate via a push shaft.

[0012] Furthermore, the guiding mechanism includes an upper support ring fixedly connected to the upper end of the fixed frame; A steering ring coaxially disposed above the upper support ring; And a T-shaped guide block connecting the upper support ring and the steering ring, the T-shaped guide block being arranged in a ring shape; The steering ring can slide circumferentially along the upper surface of the T-shaped guide block.

[0013] Furthermore, the ring-cutting mechanism includes a guide seat fixedly connected to the upper end of the steering ring; A cutting machine that is slidably mounted on the guide seat; and the cutting wheel connected to the output end of the cutting machine; A push-pull block is fixedly connected to one end of the cutting machine relative to the cutting wheel.

[0014] Furthermore, the fixed frame, push block, and push part are provided in at least three sets, evenly distributed along the circumference; The lower support ring, upper support ring, and steering ring are coaxially arranged.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting an adjustment mechanism consisting of a rotating ring, a fixed rod, and a top wheel, in conjunction with a push block with an inclined surface, enables single-handed operation. This allows multiple clamping points to be driven synchronously toward the center of the cement pile body, quickly completing coaxial positioning and ensuring that the circumferential cutting trajectory is highly coincident with the pile axis. This effectively avoids the problem of excessive load or damage to the cutting machine caused by eccentric cutting.

[0016] 2. This invention uses a circumferentially sliding steering ring in conjunction with a circumferential cutting mechanism, allowing the operator to push the push-pull block to achieve radial feed of the cutting wheel while simultaneously performing circumferential cutting motion. This results in a high degree of automation, simple operation, and a smooth and flat cross-section of the circumferentially cut pile head, greatly improving construction quality and efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a diagram showing the cooperation relationship between the positioning unit and the circumferential cutting unit of the present invention; Figure 3 This diagram illustrates the cooperation relationship between the adjusting mechanism and the clamping mechanism of the present invention. Figure 4 This is a schematic diagram of the internal structure of the clamping mechanism of the present invention; Figure 5 For the present invention in Figure 4 Enlarged view of point A in the middle; Figure 6 This is a diagram showing the fit between the fixing frame and the push block in this invention. Figure 7 This is a diagram showing the cooperation relationship between the guiding mechanism and the ring cutting mechanism of the present invention.

[0018] Reference numerals: 100, foundation; 101, cement pile body; 1, positioning unit; 11, lower support ring; 12, bracket; 13, clamping mechanism; 131, fixing frame; 1311, limiting groove; 1312, threaded hole; 132, screw; 133, push block; 1331, inclined surface; 1332, guide plate; 1333, guide groove; 134, push shaft; 135, top plate; 136, return spring; 14, adjusting mechanism; 141, rotating ring; 142, push-pull rod; 143, fixing rod; 144, top wheel; 2, ring cutting unit; 21, guiding mechanism; 211, upper support ring; 212, steering ring; 213, T-shaped guide block; 22, ring cutting mechanism; 221, guide seat; 222, cutting machine; 223, push-pull block; 224, cutting wheel. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-7 The present invention provides a technical solution: A cement pile head circumferential cutting device, comprising: The positioning unit 1 includes a lower support ring 11 supported on the foundation 100, and a clamping mechanism 13 disposed on the lower support ring 11 for surrounding the cement pile body 101 and coaxially positioning it. The circumferential cutting unit 2 includes a guide mechanism 21 fixedly connected above the clamping mechanism 13, and a circumferential cutting mechanism 22 slidably disposed on the guide mechanism 21 for circumferential cutting of the cement pile body 101. The clamping mechanism 13 includes a plurality of fixed frames 131 distributed circumferentially. A push block 133 is slidably arranged in each fixed frame 131. The push block 133 is connected to a top plate 135 on the side close to the cement pile body 101 and has an inclined surface 1331 on the side away from the cement pile body 101. The positioning unit 1 further includes an adjustment mechanism 14 rotatably mounted on the lower support ring 11. The adjustment mechanism 14 is provided with a pushing part corresponding to the inclined surface 1331. By operating the adjustment mechanism 14, the pushing part is driven to slide along the inclined surface 1331 to simultaneously push multiple pushing blocks 133 to move the top plate 135 toward the cement pile body 101 and clamp it.

[0021] As an improvement, such as Figure 3 As shown, the adjustment mechanism 14 includes a rotating ring 141 rotatably disposed within the fixed frame 131, a push-pull rod 142 fixedly connected to the outside of the rotating ring 141, and a plurality of fixed rods 143 evenly connected to the inside of the rotating ring 141 along the circumferential direction. The end of each of the fixed rods 143 is rotatably connected to the pusher.

[0022] Furthermore, such as Figure 5 As shown, the pushing part is a top wheel 144.

[0023] Furthermore, such as Figure 6 As shown, the push block 133 is fixedly connected to guide plates 1332 on the upper and lower sides of the inclined surface 1331 respectively; The fixed frame 131 is provided with a limiting groove 1311 that slides with the guide plate 1332.

[0024] The clamping mechanism 13 further includes a locking component, which includes a screw 132 threadedly connected to the top of the fixing frame 131. The guide plate 1332 on the upper part of the push block 133 is provided with a guide groove 1333 for the screw 132 to pass through; The upper end of the fixing frame 131, located outside the screw 132, is provided with a threaded hole 1312. Tightening the screw 132 will cause its lower end to abut against the rotating ring 141.

[0025] As an improvement, a return spring 136 is provided between the push block 133 and the inner wall of the fixed frame 131.

[0026] Furthermore, such as Figure 1-2 , Figure 7 As shown, the guide mechanism 21 includes an upper support ring 211 fixedly connected to the upper end of the fixed frame 131; A steering ring 212 is coaxially disposed above the upper support ring 211; And a T-shaped guide block 213 connected between the upper support ring 211 and the steering ring 212, the T-shaped guide block 213 being arranged in a ring shape; The steering ring 212 can slide circumferentially along the upper surface of the T-shaped guide block 213.

[0027] Furthermore, such as Figure 2 As shown, the ring cutting mechanism 22 includes a guide seat 221 fixedly connected to the upper end of the steering ring 212; A cutting machine 222 is slidably mounted on the guide seat 221; and the cutting wheel 224 connected to the output end of the cutting machine 222; A push-pull block 223 is fixedly connected to one end of the cutting machine 222 relative to the cutting wheel 224.

[0028] Furthermore, the fixed frame 131, push block 133, and top push part are provided in at least three sets, evenly distributed along the circumference; The lower support ring 11, the upper support ring 211, and the steering ring 212 are coaxially arranged.

[0029] In the specific implementation of this invention, such as Figure 1-6As shown, when it is necessary to remove the pile head of the cement pile body 101 on the foundation 100, the entire ring-cutting device is first placed outside the cement pile body 101 to be ring-cut. At this time, the bracket 12 supports the positioning unit 1 and the ring-cutting unit 2 above the foundation 100. Pulling the push-pull rod 142 causes the rotating ring 141 to rotate relative to the cement pile body 101. The rotating ring 141 drives the top wheel 144 to press against one side of the inclined surface 1331 through the fixing rod 143. During this process, the top wheel 144... 44 Under the action of the tangential force between the inclined surface 1331, the push block 133 is driven to compress the reset spring 136 and move towards the cement pile body 101. The push block 133 drives the top plate 135 to press against the outside of the cement pile body 101 through the push shaft 134. Then, the screw 132 is rotated. The screw 132 moves downward under the action of the thread tangential force between the screw and the threaded hole 1312, so that the rotating ring 141 after rotation adjustment is pressed and locked by the screw 132, thus completing the positioning work of the ring cutting unit 2. like Figure 1-2 As shown, the present invention provides at least three sets of fixed rods 143, push blocks 133, and fixed frames 131, each corresponding to a fixed rod 143. This allows the push rod 142 to synchronously drive multiple fixed rods 143 via the rotating ring 141 to push the push block 133 along the fixed frame 131 using the top wheel 144. This ensures that the distance each top plate 135 moves is synchronous and equal, guaranteeing that the vertical axis of the outer circle of the multiple top plates 135 is collinear with the vertical axis of the cement pile body 101. This prevents the subsequent cutting machine 222 from maintaining a consistent cutting area during circumferential cutting, thus avoiding excessive cutting area that could cause the cutting machine to burn out. like Figure 1-2 , Figure 7 As shown, after the positioning of the circumferential cutting unit 2 is completed, the cutting machine 222 is started. The push-pull block 223 is held and pushed towards the cement pile body 101. The push-pull block 223 drives the cutting machine 222 to move along the guide seat 221. The cutting machine 222 drives the cutting wheel 224 to move to the outside of the cement pile body 101 to cut the cement pile body 101. During this process, the push-pull block 223 can be pushed in the tangential direction of the steering ring 212. The push-pull block 223 transmits the thrust through the cutting machine 222 and the guide seat 221 to the steering ring 212, so that the steering ring 212 slides relative to the upper end of the T-shaped guide block 213, realizing the circumferential cutting adjustment of the cutting machine 222. Compared with the chiseling method in the prior art, the circumferential cutting method in this invention has a better flatness of the top of the pile head and will not have unevenness on the surface of the pile head, thereby improving the construction quality of the pile head.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for cutting around the head of a cement pile, characterized in that, include: The positioning unit (1) includes a lower support ring (11) supported on the foundation (100) and a clamping mechanism (13) disposed on the lower support ring (11) for surrounding the cement pile body (101) and coaxially positioning it. The circumferential cutting unit (2) includes a guide mechanism (21) fixedly connected above the clamping mechanism (13), and a circumferential cutting mechanism (22) slidably disposed on the guide mechanism (21) for circumferentially cutting the cement pile body (101). The clamping mechanism (13) includes multiple fixed frames (131) distributed circumferentially. Each fixed frame (131) has a push block (133) slidably disposed therein. The push block (133) has a top plate (135) connected to the side of the cement pile body (101) and an inclined surface (1331) on the side away from the cement pile body (101). The positioning unit (1) further includes an adjustment mechanism (14) rotatably disposed on the lower support ring (11). The adjustment mechanism (14) is provided with a jacking part corresponding to the inclined surface (1331). By operating the adjustment mechanism (14), the jacking part is driven to slide along the inclined surface (1331) to simultaneously push multiple push blocks (133) to drive the top plate (135) to move toward the cement pile body (101) and clamp it.

2. The cement pile head circumferential cutting device according to claim 1, characterized in that: The adjustment mechanism (14) includes a rotating ring (141) rotatably disposed within the fixed frame (131), a push-pull rod (142) fixedly connected to the outside of the rotating ring (141), and a plurality of fixed rods (143) uniformly connected to the inside of the rotating ring (141) in the circumferential direction. The end of each of the fixed rods (143) is rotatably connected to the pusher.

3. The cement pile head circumferential cutting device according to claim 2, characterized in that: The jacking part is a jacking wheel (144).

4. The cement pile head circumferential cutting device according to claim 2, characterized in that: The push block (133) is fixedly connected to guide plates (1332) on the upper and lower sides of the inclined surface (1331). The fixed frame (131) is provided with a limiting groove (1311) that slides with the guide plate (1332).

5. The cement pile head circumferential cutting device according to claim 3, characterized in that: The clamping mechanism (13) further includes a locking component, which includes a screw (132) threaded to the top of the fixed frame (131). The guide plate (1332) on the upper part of the push block (133) is provided with a guide groove (1333) for the screw (132) to pass through. The upper end of the fixed frame (131) and the outer side of the screw (132) are provided with a threaded hole (1312). Tightening the screw (132) will cause its lower end to abut against the rotating ring (141).

6. The cement pile head circumferential cutting device according to claim 1, characterized in that: A reset spring (136) is provided between the push block (133) and the inner wall of the fixed frame (131).

7. The cement pile head circumferential cutting device according to claim 1, characterized in that: The push block (133) is connected to the top plate (135) via the push shaft (134).

8. The cement pile head circumferential cutting device according to claim 1, characterized in that: The guiding mechanism (21) includes an upper support ring (211) fixedly connected to the upper end of the fixed frame (131). A steering ring (212) is coaxially disposed above the upper support ring (211). And a T-shaped guide block (213) connecting the upper support ring (211) and the steering ring (212), the T-shaped guide block (213) being arranged in a ring shape; The steering ring (212) can slide circumferentially along the upper surface of the T-shaped guide block (213).

9. The cement pile head circumferential cutting device according to claim 8, characterized in that: The ring cutting mechanism (22) includes a guide seat (221) fixedly connected to the upper end of the steering ring (212); A cutting machine (222) is slidably mounted on the guide seat (221); And a cutting wheel (224) connected to the output end of the cutting machine (222); A push-pull block (223) is fixedly connected to one end of the cutting machine (222) relative to the cutting wheel (224).

10. The cement pile head circumferential cutting device according to claim 1, characterized in that: The fixed frame (131), push block (133), and top push part are provided in at least three sets, which are evenly distributed along the circumference; The lower support ring (11), the upper support ring (211), and the steering ring (212) are coaxially arranged.

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