An auxiliary device for pulling out and placing casings during building pile foundation construction.

Abstract

This utility model discloses an auxiliary device for the extraction and placement of casings in building pile foundation construction, including a casing support mechanism to prevent casing swaying; and a displacement force rotation mechanism installed at the bottom of the casing support mechanism. During the lowering and extraction of the casing, the displacement force rotation mechanism buffers the displacement force through the rotation of the casing support mechanism. The displacement force rotation mechanism includes a base, and a turntable structure is rotatably connected to the top of the base. The casing support mechanism is fixedly installed on the turntable structure. Several pulley structures that limit and roll on the turntable structure are installed on the top of the base. The above structure effectively solves the technical defect of unstable support and guide structure caused by displacement force and displacement torque resulting from the swaying of the casing during the lowering of the building pile driver.

Description

Technical Field

[0001] This utility model belongs to the field of building construction pile driving support technology, and in particular relates to an auxiliary device for pulling out and placing protective casing in building pile foundation construction. Background Technology

[0002] Pile foundation construction is a common process in building construction. It involves using a pile driver to create a pile trench of a certain depth in the ground. To prevent the trench from collapsing, a casing of a certain length is often lowered into the trench to support the upper part. Then, a reinforcing cage is hoisted into the trench and concrete is poured on top. This serves as the pile foundation, upon which the subsequent structural loads of the building are borne.

[0003] To effectively prevent pile trench collapse, the casing is often several meters or even tens of meters long, and its thickness is subject to certain requirements to prevent deformation. After the subsequent reinforcement cage is poured, the casing needs to be pulled out of the pile trench for recycling.

[0004] During construction, a crane is often used to place and remove the casing from the pile trench. However, when placing and removing casings of a certain length, which are suspended by steel cables, the casings are prone to swaying. This swaying makes it difficult to lower the casing vertically, and if the swaying casing deviates and hits the trench wall, it is very difficult to correct.

[0005] The reason is that the casing is heavy and often large, making it very difficult to manually push and adjust, and the operation is very risky.

[0006] Therefore, if the casing is guided and its posture is automatically adjusted during the casing lowering process to ensure the casing is lowered vertically, it will not only greatly reduce the difficulty of the operation, but also significantly improve the efficiency of casing lowering or pulling out.

[0007] However, the current operating methods, such as direct lifting and lowering by crane and pulling, result in a series of drawbacks, including low operating efficiency and high operating risks. Utility Model Content

[0008] Based on the above background, the purpose of this utility model is to provide an auxiliary device for pulling out and releasing the casing during the construction of building pile foundations.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: An auxiliary device for pulling out and placing casings in building pile foundation construction, including a casing support mechanism to prevent casing swaying; It also includes an offset force rotation mechanism installed at the bottom of the casing support mechanism; During the lowering and pulling of the casing, the casing support mechanism uses the offset force rotation mechanism to buffer the offset force. The offset force rotation mechanism includes a base, and a turntable structure is rotatably connected to the top of the base. The protective cylinder support mechanism is fixedly installed on the turntable structure. The top of the base is equipped with several pulleys that limit the rolling motion of the turntable structure.

[0010] Preferably, the turntable structure includes an annular turntable, and the outer side wall of the annular turntable is integrally formed with a protruding annular track seat; The pulley structure rolls on a circular track seat.

[0011] Preferably, the pulley structure includes a pulley bracket, with an upper pulley and a lower pulley respectively installed at the upper and lower ends of the pulley bracket; The upper pulley and the lower pulley are clamped on the annular track seat.

[0012] Preferably, the outer wall of the pulley bracket is welded with a stiffening plate, and the bottom of the stiffening plate is welded with a mounting plate, which is fastened to the base by bolts.

[0013] Preferably, the casing support mechanism includes hydraulic support wheel assemblies fixedly installed on both sides of the top of the annular turntable; The hydraulic support wheel assemblies on both sides are symmetrically arranged.

[0014] Preferably, the hydraulic support wheel assembly includes a hydraulic telescopic track structure, and the telescopic end of the hydraulic telescopic track structure is equipped with a guide pulley that abuts against the outside of the protective cylinder; It also includes a hydraulic pitching propulsion structure that drives the hydraulic telescopic track structure to pitch up and down.

[0015] Preferably, the hydraulic support wheel assembly further includes a support base fixedly installed at the top of the annular turntable, and the hydraulic telescopic track structure includes a track cylinder portion hinged to the outer side of the top of the support base; It also includes a telescopic rail section that slides to connect the track cylinder; and a guide pulley that is rotatably connected to the end of the telescopic rail section. The track cylinder is equipped with a first hydraulic cylinder that drives the telescopic track to extend and retract.

[0016] Preferably, the hydraulic pitching push structure includes a second hydraulic cylinder hinged to the inner side of the top of the support base; The pushing end of the second hydraulic cylinder is hinged and installed at the bottom upper end of the track cylinder.

[0017] Preferably, the telescopic rail section and the track cylinder section are connected by a guide rail structure for limiting sliding connection; The guide rail structure includes several guide rails integrally formed on the inner side wall of the track cylinder; The outer wall of the telescopic rail is provided with several sliding grooves for connecting the guide rail.

[0018] This utility model has the following beneficial effects: The hydraulic support wheel assembly can be adjusted in angle (opening or closing) via a second hydraulic cylinder, and its length can be adjusted via a hydraulic telescopic track structure. This allows for construction work on casings of different diameters that do not pass through pile foundations. For example, large-diameter casings can be moved by opening the hydraulic telescopic track structures on both sides via the second hydraulic cylinder, and conversely, by closing them.

[0019] Secondly, the adjustable guide pulley supports the height of the casing (height from the ground), so that for casings with a large length, the height of the guide pulley support can be appropriately raised (the angle adjustment of the first hydraulic cylinder is combined with the length adjustment of the hydraulic telescopic track structure) to ensure that the casing can be stably guided and supported.

[0020] Furthermore, the casing is lowered or pulled out vertically under the support of guide pulleys on both sides. When the casing is misaligned, such as to the rear, the hydraulic telescopic track structure on that side extends appropriately to push the casing forward to correct its posture.

[0021] 2. During the process of guiding and lowering the protective casing, once the swaying casing generates a misalignment force (misalignment in the front-to-back direction), the misalignment force will generate a misalignment torque. In order to protect the entire device, even if the misalignment force is "relieved", the above-mentioned misalignment force rotation mechanism can "relieve" the misalignment force by rotating when encountering the misalignment force. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the casing support mechanism guiding the lowering of the casing in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the casing support mechanism in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the hydraulic support wheel assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the track cylinder in an embodiment of the present invention; Figure 5 This is an embodiment of the present utility model. Figure 2 The top view in the image.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] Example 1: like Figure 1-5 As shown, an auxiliary device for pulling and releasing casing in building pile foundation construction includes a casing support mechanism to prevent casing sway. Specifically, the casing support mechanism guides the casing 1 during lowering and pulling, and corrects the casing posture according to the direction of its deviation. For example, if the casing 1 tilts to one side, it can be pushed in the opposite direction to ensure that the casing can be smoothly lowered or pulled out in a vertical position.

[0029] The above-mentioned technical means effectively solve the problem of the difficulty of hoisting operations (the casing is lowered or pulled out by a crane after being secured with steel cables) caused by the swaying and deviation of the casing 1 during the lowering process.

[0030] Example 2: like Figure 1-5 As shown in the figure, this embodiment, based on the structure of embodiment 1, specifically discloses a schematic diagram of the structure of the casing support mechanism.

[0031] Specifically, the casing support mechanism includes hydraulic support wheel assemblies 2 fixedly installed on the front and rear sides of the top of the annular turntable 4. The hydraulic support wheel assemblies 2 on both sides are symmetrically arranged front and rear.

[0032] The specific structure of the hydraulic support wheel assembly 2 is as follows: The hydraulic support wheel assembly 2 includes a hydraulic telescopic track structure, and the telescopic end of the hydraulic telescopic track structure is equipped with a guide pulley 23 that abuts against the outside of the protective cylinder 1.

[0033] Specifically, the hydraulic support wheel assembly 2 also includes a support base 26 fixedly installed at the top of the annular turntable 4 (a triangular connecting rib plate 261 is welded to the bottom of the support base 26, and the triangular connecting rib plate 261 is welded to the inner side wall of the annular turntable 4 to improve stability). The hydraulic telescopic track structure includes a track cylinder 22 hinged to the outer side of the top of the support base 26 (the track cylinder 22 is welded with an ear seat, and a hinge seat is welded to the top of the support base 26, and the ear seat and the hinge seat are hinged by a pin).

[0034] It also includes a telescopic rail section 21 that is slidably connected to the track cylinder section 22; a guide pulley 23 is rotatably connected to the end position of the telescopic rail section 21. The rotatable connection method is a conventional method disclosed in the prior art (a wheel groove mounting port is opened at the outer end of the telescopic rail section 21, and the wheel axle of the guide pulley 23 is rotatably connected to the wheel groove mounting port).

[0035] Meanwhile, a first hydraulic cylinder 24 is installed on the track cylinder 22 to push the telescopic rail 21 to extend and retract. Specifically, the cylinder of the first hydraulic cylinder 24 is pinned to the lower end of the side wall of the track cylinder 22 (a U-shaped seat is welded to the lower end of the side wall of the track cylinder 22, and a tongue plate is welded to the cylinder, and the two are pinned together by a pin).

[0036] Similarly, the piston rod of the first hydraulic cylinder 24 is pinned to the upper end position (near the end position) of the side wall of the telescopic rail 21 by the same pinning structure.

[0037] The system also includes a hydraulic pitching mechanism to move the hydraulic telescopic track structure up and down. This hydraulic pitching mechanism includes a second hydraulic cylinder 25 hinged to the inner top of the support base 26. Specifically, the hinge is as follows: a hinge tongue is welded to the bottom of the cylinder of the second hydraulic cylinder 25, and a corresponding hinge seat is welded to the top of the support base 26; the two are hinged together by a pin. The pushing end of the second hydraulic cylinder 25 is hinged to the upper bottom of the track cylinder section 22. The hinge method is the same as that used for hinged mounting of the cylinder to the support base 26.

[0038] During operation, the entire device is placed on the ground, with the opening of the pile trench coinciding with the annular opening on the base below. Subsequently, the crane lifts the casing 1 according to normal construction procedures, extending it between the hydraulic support wheel assemblies 2 on both sides. Then, the second hydraulic cylinder 25 pulls the hydraulic telescopic rail structure closer to the casing 1, and the first hydraulic cylinder 24 pushes the telescopic rail part 21 out (in the maximum pushing state of the first hydraulic cylinder 24, the telescopic rail part 21 will not detach from the rail cylinder part 22) until the guide pulley 23 contacts the casing.

[0039] The advantages of the above structural design are as follows: Firstly, the hydraulic support wheel assembly 2 can be adjusted in angle to open or close position via the second hydraulic cylinder 25, and its length can be adjusted via the hydraulic telescopic track structure. This allows for construction operations to be carried out on casings of different diameters that do not pass through pile foundations during operation. For example, for large-diameter casings, the second hydraulic cylinder 25 can be used to open the hydraulic telescopic track structures on both sides, and vice versa.

[0040] Secondly, the adjustable guide pulley 23 supports the height position (distance from the ground) on the casing 1, so that for casing 1 with a large length, the support height of the guide pulley 23 can be appropriately raised (the angle adjustment of the first hydraulic cylinder 24 is combined with the length adjustment of the hydraulic telescopic track structure) to ensure that the casing can be stably guided and supported.

[0041] Furthermore, the casing is lowered or pulled out vertically under the support of the guide pulleys 23 on both sides. If the casing 1 is misaligned, such as to the rear, the hydraulic telescopic track structure on that side will extend appropriately to push the casing 1 forward to correct its posture. The reverse is also true.

[0042] Example 3: like Figure 1-5 As shown, in this embodiment, based on the structure of Embodiment 2, to increase the stability of telescopic sliding, the telescopic rail section 21 and the track cylinder section 22 are connected by a guide rail structure for limiting sliding. The guide rail structure includes four guide rails 212 integrally formed on each inner side wall of the track cylinder section 22 (the cross-sectional shape of the track cylinder section 22 is square). Correspondingly, a plurality of sliding grooves 211 are provided on the outer side wall of the telescopic rail section 21 to slide and connect the guide rails 212. This method increases the stability of telescopic sliding and prevents the guide pulley 23 from deviating from the protective cylinder.

[0043] Example 4: like Figure 1-5As shown, this embodiment is based on the structure of embodiment 3. The hydraulic circuit system of the first hydraulic cylinder 24 and the second hydraulic cylinder 25 is a conventional hydraulic control method disclosed in the prior art. The first hydraulic cylinder 24 and the second hydraulic cylinder 25 use hydraulic cylinders with different thrust types depending on the actual situation. For example, for large casings, the corresponding hydraulic telescopic track structure uses a longer steel structure track, requiring a hydraulic cylinder with a larger thrust. However, for conventional simple pile foundation construction support, a conventional thrust type hydraulic cylinder is sufficient.

[0044] Example 5: like Figure 1-5 As shown, this embodiment, based on the structure of embodiment 4, further includes a misalignment force rotation mechanism 3 installed at the bottom of the casing support mechanism. That is, during the process of guiding and lowering the casing, once the swaying casing generates a misalignment force (misalignment in the front-to-back direction), the misalignment force will form a misalignment torque. In order to protect the entire device, even if the misalignment force is "relieved", the aforementioned misalignment force rotation mechanism 3 can "relieve" the misalignment force by rotating when encountering the misalignment force.

[0045] Specifically, the offset force rotation mechanism 3 includes a base 31 (in the shape of a ring), a turntable structure is rotatably connected to the top of the base 31, and the protective cylinder support mechanism is fixedly installed on the turntable structure; a number of pulley structures 32 that limit rolling on the turntable structure are installed on the top of the base 31.

[0046] Specifically, the turntable structure includes an annular turntable 4, the outer wall of which is integrally formed with a protruding annular track seat 41; the pulley structure 3 rolls on the annular track seat 41.

[0047] Specifically, the pulley structure 32 includes a pulley bracket 321, with an upper pulley 322 and a lower pulley 323 respectively installed at the upper and lower ends of the pulley bracket 321; the upper pulley 322 and the lower pulley 323 are clamped on the annular track seat.

[0048] In actual operation, in order to prevent the pulley structure from derailing, annular track grooves for limiting the upper pulley 322 and the lower pulley 323 can be opened at the top and bottom of the annular track seat in the existing manner, and the upper pulley 322 and the lower pulley 323 can be limited to roll in the annular track groove.

[0049] Meanwhile, stiffening plates are welded to the outer wall of the pulley bracket 321, and mounting plates are welded to the bottom of the stiffening plates. The mounting plates are fastened to the base 31 by bolts.

[0050] Under the action of the offset force, because the casing support mechanism is installed on the rotating turntable structure, if the guide pulley 23 on the rear side is subjected to the shaking casing 1 and generates an offset force on the left side, the turntable structure will immediately rotate under the action of the offset force, and the offset force will be relieved by the rotation (this rotation is mostly a small-amplitude rotation and does not affect the hydraulic cylinder oil pipe).

[0051] Meanwhile, the turntable structure can also support and guide the casing 1 from different directions during operation.

[0052] In the above-mentioned turntable structure, a circumferentially distributed pulley structure 3 is used to assist the rotation of the annular turntable 4 by clamping and rolling. This structure not only has high rotational stability, but also ensures the support stability of the support structure during operation with multi-point support.

[0053] Example 6: like Figure 1-5 As shown, in this embodiment, based on the structure of embodiment 5, in order to facilitate the movement of the entire device during actual operation, several universal wheels can be installed at the bottom of the base 31 in the existing manner to facilitate pushing it to the pile foundation trench position.

[0054] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An auxiliary device for pulling out and placing casings during building pile foundation construction, characterized in that, This includes casing support mechanisms to prevent casing swaying; It also includes an offset force rotation mechanism installed at the bottom of the casing support mechanism; During the lowering and pulling of the casing, the casing support mechanism uses the offset force rotation mechanism to buffer the offset force. The offset force rotation mechanism includes a base, and a turntable structure is rotatably connected to the top of the base. The protective cylinder support mechanism is fixedly installed on the turntable structure. The top of the base is equipped with several pulleys that limit the rolling motion of the turntable structure.

2. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 1, characterized in that, The turntable structure includes an annular turntable, and the outer side wall of the annular turntable is integrally formed with a protruding annular track seat. The pulley structure rolls on a circular track seat.

3. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 2, characterized in that, The pulley structure includes a pulley bracket, with an upper pulley and a lower pulley respectively installed at the upper and lower ends of the pulley bracket; The upper pulley and the lower pulley are clamped on the annular track seat.

4. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 3, characterized in that, The outer wall of the pulley bracket is welded with stiffening plates, and the bottom of the stiffening plates is welded with mounting plates. The mounting plates are fastened to the base with bolts.

5. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 2, characterized in that, The casing support mechanism includes hydraulic support wheel assemblies that are fixedly installed on both sides of the top of the annular turntable; The hydraulic support wheel assemblies on both sides are symmetrically arranged.

6. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 5, characterized in that, The hydraulic support wheel assembly includes a hydraulic telescopic track structure, and the telescopic end of the hydraulic telescopic track structure is equipped with a guide pulley that abuts against the outside of the protective cylinder; It also includes a hydraulic pitching propulsion structure that drives the hydraulic telescopic track structure to pitch up and down.

7. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 6, characterized in that, The hydraulic support wheel assembly also includes a support base fixedly installed at the top of the annular turntable, and the hydraulic telescopic track structure includes a track cylinder section hinged to the outer side of the top of the support base. It also includes a telescopic rail section that slides to connect the track cylinder; and a guide pulley that is rotatably connected to the end of the telescopic rail section. The track cylinder is equipped with a first hydraulic cylinder that drives the telescopic track to extend and retract.

8. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 7, characterized in that, The hydraulic pitching propulsion structure includes a second hydraulic cylinder hinged to the inner side of the top of the support base; The pushing end of the second hydraulic cylinder is hinged and installed at the bottom upper end of the track cylinder.

9. The auxiliary device for pulling out and placing the casing in building pile foundation construction according to claim 7, characterized in that, The telescopic rail section and the track cylinder section are connected by a guide rail structure for limiting sliding connection; The guide rail structure includes several guide rails integrally formed on the inner side wall of the track cylinder; The outer wall of the telescopic rail is provided with several sliding grooves for connecting the guide rail.

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