Cast-in-place pile casing pulling-out device

Abstract

The utility model relates to the technical field of cast-in-place pile casing pulling, in particular to a cast-in-place pile casing pulling device. The device comprises a supporting table, a through hole matched with the cast-in-place pile casing in diameter is formed in the middle of the supporting table, a left clamping piece and a right clamping piece which are used for clamping the cast-in-place pile casing are arranged on the upper portion of the supporting table, and a power mechanism used for driving the left clamping piece and the right clamping piece to move up and down in a reciprocating mode is arranged on the supporting table. According to the device, the cast-in-place pile casing can be continuously pulled out until the cast-in-place pile casing is pulled out; according to the device, the transverse friction force and the vertical drawing force of the device are obviously increased through the left hydraulic oil cylinder and the right hydraulic oil cylinder, the pulling capacity of the device is improved, and the long cast-in-place pile casing can be smoothly pulled out.

Description

Technical Field

[0001] This utility model relates to the field of cast-in-place pile casing extraction technology, specifically a cast-in-place pile casing extraction device. Background Technology

[0002] A cast-in-place pile casing is a structure used to protect the borehole opening of a bored cast-in-place pile. During construction, the casing needs to be pulled out. Some cast-in-place pile casings are designed to be quite long and cannot be pulled out normally using ordinary pulling devices.

[0003] Chinese Patent 202120611690.X discloses a "Steel Casing Pulling-Out Device" (Publication No. CN 215482946U). This device includes a base and a lifting platform. Through holes are provided at the bottom and the middle of the lifting platform. Several lifting mechanisms are connected between the base and the lifting platform. Several hooks for catching holes in the steel casing are connected to the inner wall of the lifting platform. Several limiting tubes are fixed to the bottom of the lifting platform, and the output ends of the lifting mechanisms are fitted inside the limiting tubes. However, this device has some drawbacks: the lifting mechanisms can only lift the cast-in-place pile casing upwards a short distance, and cannot continuously pull it out. Therefore, this device can only pull the cast-in-place pile casing upwards a small section and cannot completely remove it. Utility Model Content

[0004] In order to solve the problems of the prior art, the present invention provides a device for pulling out the casing of a cast-in-place pile, which can continuously pull out the casing of the cast-in-place pile until the casing of the cast-in-place pile is pulled out.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for pulling out a cast-in-place pile casing, comprising a support platform, wherein a through hole matching the diameter of the cast-in-place pile casing is provided in the middle of the support platform, and a left clamping member and a right clamping member for clamping the cast-in-place pile casing are provided on the upper part of the support platform, and a power mechanism for driving the left clamping member and the right clamping member to move up and down reciprocally is provided on the support platform.

[0006] The above structural design enables continuous extraction of the casing of the cast-in-place pile until the casing is completely removed.

[0007] Preferably, the left clamping member and the right clamping member together form a ring-shaped structure that matches the diameter of the cast-in-place pile casing. The left end of the left clamping member is hinged to the left end of the right clamping member. The right end of the left clamping member and the right clamping member is provided with a first hydraulic cylinder for driving the opening and closing of the left clamping member and the right clamping member. The right end of the first hydraulic cylinder is hinged to the left end of the first hydraulic cylinder and the right end of the first hydraulic cylinder is hinged to the right end of the right clamping member.

[0008] With the above structural design, when the first hydraulic cylinder retracts, the left and right clamping parts clamp the cast-in-place pile casing; when the first hydraulic cylinder extends, the left and right clamping parts release each other, thus realizing the opening and closing action of the left and right clamping parts.

[0009] Preferably, the power mechanism includes a left hydraulic cylinder whose upper end is fixedly connected to the left clamping member, and a right hydraulic cylinder whose upper end is fixedly connected to the right clamping member. The lower end of the left hydraulic cylinder is slidably connected to the support platform, and the lower end of the right hydraulic cylinder is slidably connected to the support platform.

[0010] By adopting the above structural design, the lateral friction and vertical pulling force are significantly increased by the left and right hydraulic cylinders, thereby improving the pulling capacity of this device and enabling the smooth extraction of longer cast-in-place pile casings.

[0011] Preferably, a hydraulic controller is provided on the outside of the support platform, the first hydraulic cylinder is connected to the hydraulic controller through a first pipe, the left hydraulic cylinder is connected to the hydraulic controller through a left pipe, and the right hydraulic cylinder is connected to the hydraulic controller through a right pipe.

[0012] With the above structural design, the left hydraulic cylinder, right hydraulic cylinder and first hydraulic cylinder are controlled by a hydraulic controller. For cast-in-place pile casings of different lengths, the parameters of the left hydraulic cylinder, right hydraulic cylinder and first hydraulic cylinder are adjusted in a timely manner.

[0013] Preferably, anti-slip strips are fixedly connected to the inner sidewalls of both the left and right clamping members.

[0014] The above structural design increases the friction between the left and right clamping parts and the cast-in-place pile casing, preventing the cast-in-place pile casing from slipping off.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This device can continuously pull out the casing of cast-in-place piles until the casing is completely removed. By using the left and right hydraulic cylinders, this device significantly increases the lateral friction and vertical pulling force, thereby improving its pulling capacity and enabling the smooth removal of longer casings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention in its lifting state;

[0019] Figure 3 This is a front view structural diagram of the present invention;

[0020] Figure 4 This is a top view of the structure of this utility model; Detailed Implementation

[0021] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 This utility model provides a technical solution: a device for pulling out the casing of a cast-in-place pile, including a support platform 1. The support platform 1 has a through hole 11 in the middle that matches the diameter of the casing of the cast-in-place pile. The upper part of the support platform 1 is provided with a left clamping member 21 and a right clamping member 22 for clamping the casing of the cast-in-place pile. The support platform 1 is provided with a power mechanism for driving the left clamping member 21 and the right clamping member 22 to move up and down reciprocally.

[0022] The left clamping member 21 and the right clamping member 22 together form a ring-shaped structure that matches the diameter of the cast-in-place pile casing. The left end of the left clamping member 21 is hinged to the left end of the right clamping member 22. The right end of the left clamping member 21 and the right clamping member 22 is provided with a first hydraulic cylinder 23 that drives the left clamping member 21 and the right clamping member 22 to open and close. The right end of the first hydraulic cylinder 23 is hinged to the left end of the first hydraulic cylinder 23, and the right end of the first hydraulic cylinder 23 is hinged to the right end of the right clamping member 22.

[0023] The power mechanism includes a left hydraulic cylinder 31 fixedly connected to the left clamping member 21 at its upper end, and a right hydraulic cylinder 32 fixedly connected to the right clamping member 22 at its upper end. The lower end of the left hydraulic cylinder 31 is slidably connected to the support platform 1, and the lower end of the right hydraulic cylinder 32 is also slidably connected to the support platform 1. Two sets of left hydraulic cylinders 31 are symmetrically arranged at both ends of the left clamping member 21, and two sets of right hydraulic cylinders 32 are symmetrically arranged at both ends of the right clamping member 22. The lower ends of both the left and right hydraulic cylinders 31 and 32 are fixedly connected to sliders 38, which are slidably connected to slide grooves 39, which are fixedly connected to the support platform 1. When the left and right clamping members 21 and 22 open and close, they will slide along the support platform 1, carrying the left and right hydraulic cylinders 31 and 32 with them.

[0024] A hydraulic controller 4 is provided on the outside of the support platform 1. The first hydraulic cylinder 23 is connected to the hydraulic controller 4 through the first pipe 24. The left hydraulic cylinder 31 is connected to the hydraulic controller 4 through the left pipe 33. The right hydraulic cylinder 32 is connected to the hydraulic controller 4 through the right pipe 34.

[0025] Anti-slip strips 5 are fixedly connected to the inner sidewalls of the left clamping member 21 and the right clamping member 22, and the anti-slip strips 5 are evenly spaced on the inner sidewalls of the left clamping member 21 and the right clamping member 22.

[0026] Working principle: First, the staff installs the device on the construction ground above the cast-in-place pile. The support platform 1 is fitted onto the cast-in-place pile casing. The left clamping member 21 and the right clamping member 22 clamp the cast-in-place pile casing. Next, the staff operates the hydraulic controller 4. The first hydraulic cylinder 23 retracts, and the left clamping member 21 and the right clamping member 22 clamp the cast-in-place pile casing. The left hydraulic cylinder 31 and the right hydraulic cylinder 32 extend, lifting the clamped cast-in-place pile casing. Next, the first hydraulic cylinder 23 extends, and the left clamping member 21 and the right clamping member 22 open, releasing the cast-in-place pile casing. The left hydraulic cylinder 31 and the right hydraulic cylinder 32 retract, resetting the left clamping member 21 and the right clamping member 22. The above steps are repeated until the cast-in-place pile casing is pulled out.

[0027] During the extraction of the cast-in-place pile casing, in order to prevent the casing from falling suddenly, workers can use a crane to hold the casing and raise the hook as the casing rises.

[0028] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the scope of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this utility model's implementation.

[0029] The present invention has been described above with reference to preferred embodiments, but the scope of protection of the present invention is not limited thereto. All technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications can be made to the present invention, and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A device for pulling out the casing of a cast-in-place pile, comprising a support platform (1), characterized in that: The support platform (1) has a through hole (11) in the middle that matches the diameter of the cast-in-place pile casing. The upper part of the support platform (1) is provided with a left clamping member (21) and a right clamping member (22) for clamping the cast-in-place pile casing. The support platform (1) is provided with a power mechanism for driving the left clamping member (21) and the right clamping member (22) to move up and down reciprocally.

2. The device for pulling out the casing of a cast-in-place pile according to claim 1, characterized in that: The left clamping member (21) and the right clamping member (22) together form a ring-shaped structure that matches the diameter of the cast-in-place pile casing. The left end of the left clamping member (21) is hinged to the left end of the right clamping member (22). The right end of the left clamping member (21) and the right clamping member (22) is provided with a first hydraulic cylinder (23) to drive the opening and closing of the left clamping member (21) and the right clamping member (22). The right end of the first hydraulic cylinder (23) is hinged to the left end of the first hydraulic cylinder (23), and the right end of the first hydraulic cylinder (23) is hinged to the right end of the right clamping member (22).

3. The device for pulling out the casing of a cast-in-place pile according to claim 2, characterized in that: The power mechanism includes a left hydraulic cylinder (31) whose upper end is fixedly connected to the left clamping member (21), and a right hydraulic cylinder (32) whose upper end is fixedly connected to the right clamping member (22). The lower end of the left hydraulic cylinder (31) is slidably connected to the support platform (1), and the lower end of the right hydraulic cylinder (32) is slidably connected to the support platform (1).

4. The device for pulling out the casing of a cast-in-place pile according to claim 3, characterized in that: A hydraulic controller (4) is provided on the outside of the support platform (1). The first hydraulic cylinder (23) is connected to the hydraulic controller (4) through the first pipe (24). The left hydraulic cylinder (31) is connected to the hydraulic controller (4) through the left pipe (33). The right hydraulic cylinder (32) is connected to the hydraulic controller (4) through the right pipe (34).

5. A casing extraction device for cast-in-place piles according to any one of claims 1 to 4, characterized in that: Anti-slip strips (5) are fixedly connected to the inner walls of both the left clamp (21) and the right clamp (22).

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