An extension device

Abstract

The utility model provides an extension device belongs to prefabricated pile auxiliary construction technical field, including telescopic module, horizontal limit rod, vertical limit rod, there are a plurality of articulated modules along the axial direction round array of telescopic module, every articulated module includes first articulated rod and second articulated rod, when working, the prefabricated hollow core square pile of temporary fixed good wing is placed in the hole opened in the ground, the slurry in the hole is wrapped the outside wall of prefabricated hollow core square pile, handheld vertical limit rod is put into prefabricated hollow core square pile with the state that horizontal limit rod and prefabricated hollow core square pile hollow inner hole cross section diagonal line is parallel downward to extension device, until first articulated rod and second articulated rod articulated place and the partial area of wing located in prefabricated hollow core square pile contact, at this moment, start telescopic module and continue to push the wing to the outer wall of prefabricated hollow core square pile after the articulated place of first articulated rod and second articulated rod push away the temporary fixed iron sheet to push, to realize the expansion of wing.

Description

Technical Field

[0001] This utility model belongs to the field of precast pile auxiliary construction technology, and in particular relates to an extension device. Background Technology

[0002] Precast piles are widely used in foundation engineering projects such as buildings, bridges, and ports due to their advantages of stable quality and fast construction speed caused by factory production. To further improve the bearing capacity of precast piles, especially their stability under lateral loads (such as wind loads, seismic loads, and earth pressure), pile sidewall technology has emerged. This technology involves pre-setting grooves in the sidewalls of the pile and installing deployable metal or composite material wings within them. These wings significantly increase the effective cross-sectional area and lateral resistance of the pile, providing additional resistance to bending and lateral displacement. They are particularly suitable for soft soil foundations, areas with high seismic fortification requirements, or pile foundations subjected to large horizontal forces.

[0003] However, the existing techniques for pushing and extending the support wings from the pre-set grooves of the precast piles are usually carried out by using non-specialized tools such as manual hammers, pry bars, and simple hydraulic jacks. This operation relies on manual positioning of the tools to extend the support wings. However, when operating manually, because the tools do not have a precise positioning system, it is difficult for the operator to ensure that the pushing force of the tool is strictly perpendicular to the pushing direction of the support wings. Therefore, the support wings are prone to eccentric force when being pushed out. This eccentric force can cause the support wings to tilt and twist during the pushing process, making it difficult for them to slide smoothly out of the pre-set track, or even get stuck in the groove. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an extension device to solve the problem that the support wings on precast piles are difficult to extend accurately in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides an extension device, the extension device comprising:

[0006] Telescopic module;

[0007] A plurality of hinge modules are arranged in a circular array along the axial direction of the telescopic module. Each hinge module includes a first hinge rod and a second hinge rod. One end of the first hinge rod is hinged to the fixed end of the telescopic module, the other end of the first hinge rod is hinged to one end of the second hinge rod, and the other end of the second hinge rod is hinged to the extended end of the telescopic module.

[0008] A lateral limiting rod is fixedly installed at the fixed end of the telescopic module, and the length direction of the lateral limiting rod is perpendicular to the axial direction of the telescopic module.

[0009] A vertical limiting rod is fixedly installed on a horizontal limiting rod, and the length direction of the vertical limiting rod is perpendicular to the length direction of the horizontal limiting rod.

[0010] As an optional solution, the telescopic module includes a first mounting bracket, a second mounting bracket, and a telescopic power source;

[0011] The fixed end of the telescopic power source is fixedly mounted on the first mounting bracket, and the extended end of the telescopic power source is fixedly mounted on the second mounting bracket. The first mounting bracket is located above the second mounting bracket.

[0012] As an optional solution, the rotation axis at the hinge of the first hinge rod and the second hinge rod is the first rotation axis, which is perpendicular to the axial direction of the telescopic power source.

[0013] As an optional solution, the first mounting bracket is hinged to the first hinge rod, and the rotation axis at the hinge point of the first mounting bracket and the first hinge rod is the second rotation axis, which is parallel to the first rotation axis.

[0014] As an optional solution, the second mounting bracket is hinged to the second hinge rod, and the rotation axis at the hinge point of the second mounting bracket and the second hinge rod is a third rotation axis, which is parallel to the first rotation axis.

[0015] As an optional solution, the lateral limiting rod is fixedly installed on the upper end face of the first mounting bracket, and both ends of the lateral limiting rod in the length direction have mutually perpendicular surfaces.

[0016] As an optional solution, the lower end of the vertical limiting rod is fixedly installed at one end of the transverse limiting rod along its length, and the upper end of the vertical limiting rod is higher than the upper surface of the transverse limiting rod.

[0017] As an optional solution, two adjacent sidewalls of the vertical limiting rod are flush with two surfaces that are perpendicular to one end of the transverse limiting rod along its length.

[0018] As described above, the extension device of this utility model has at least the following beneficial effects:

[0019] 1. The length of the transverse limiting rod of this utility model is the same as the diagonal length of the cross-section of the hollow inner hole of the precast hollow square pile. When the extension device is placed into the precast hollow square pile, the two perpendicular surfaces of the transverse limiting rod along its length direction are in contact with the corresponding adjacent sidewalls of the hollow inner hole of the precast hollow square pile. Therefore, when the transverse limiting rod is lowered into the precast hollow square pile, it is inserted downwards in a state parallel to the diagonal of the cross-section of the hollow inner hole of the precast hollow square pile. This ensures that the extension device will only move along the axial direction of the precast hollow square pile when it is lowered into the precast hollow square pile, and will not slide or rotate horizontally within the precast hollow square pile. Thus, the transverse limiting rod can automatically position the extension device within the diagonal of the cross-section of the hollow inner hole of the precast hollow square pile. When the extension device is working, it can push the support wing to slide smoothly out of the preset track to ensure the stability of the extension device during operation.

[0020] 2. When the telescopic power source of this utility model retracts, the hinge joint of the first and second hinge rods pushes the support wing outward toward the outer wall of the precast hollow square pile. Since the support wing provides a reverse force to the hinge joint of the first and second hinge rods, the entire extension device moves upward. Therefore, when the telescopic power source is working, the vertical limiting rod extending from the upper end face of the precast hollow square pile is manually fixed to ensure that the extension device does not move upward when working, so that the support wing can accurately and stably push outward toward the outer wall of the precast hollow square pile.

[0021] 3. In this utility model, when the extension device is placed into the precast hollow square pile, two side walls of the vertical limiting rod are in contact with the two side walls adjacent to the hollow inner hole of the precast hollow square pile. Therefore, when the vertical limiting rod is lowered into the precast hollow square pile, it extends from top to bottom into the precast hollow square pile by maintaining contact with the two side walls adjacent to the hollow inner hole of the precast hollow square pile through two of its side walls. Furthermore, the vertical limiting rod is fixedly installed at one end of the horizontal limiting rod along its length direction. This ensures that when the extension device is lowered into the precast hollow square pile, it will only move in the axial direction of the precast hollow square pile and will not tip over along the diagonal direction of the cross-section of the hollow inner hole of the precast hollow square pile, thereby ensuring the stability of the extension device during operation. Attached Figure Description

[0022] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0023] Figure 2 This is a structural schematic diagram of the horizontal and vertical limiting rods of this utility model from another perspective;

[0024] Figure 3 The diagram shown is an exploded view of the telescopic module and one of the hinge modules of this utility model.

[0025] In the diagram: 101, first hinge rod; 102, second hinge rod;

[0026] 201. Lateral limiting rod; 202. Vertical limiting rod;

[0027] 301. First mounting bracket; 302. Second mounting bracket; 303. Telescopic power source. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0029] Please see Figures 1 to 3 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they 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 invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0030] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0031] Please see Figures 1 to 3 This utility model provides an extension device, the extension device comprising:

[0032] Telescopic module;

[0033] A plurality of hinge modules are arranged in a circular array along the axial direction of the telescopic module. Each hinge module includes a first hinge rod 101 and a second hinge rod 102. One end of the first hinge rod 101 is hinged to the fixed end of the telescopic module, the other end of the first hinge rod 101 is hinged to one end of the second hinge rod 102, and the other end of the second hinge rod 102 is hinged to the extended end of the telescopic module.

[0034] A lateral limiting rod 201 is fixedly installed at the fixed end of the telescopic module, and the length direction of the lateral limiting rod 201 is perpendicular to the axial direction of the telescopic module.

[0035] A vertical limiting rod 202 is fixedly installed on a horizontal limiting rod 201, and the length direction of the vertical limiting rod 202 is perpendicular to the length direction of the horizontal limiting rod 201.

[0036] In this embodiment, the cross-section of the hollow inner hole of the precast hollow square pile is square. The length of the horizontal limiting rod 201 is the same as the diagonal length of the cross-section of the hollow inner hole of the precast hollow square pile. The precast hollow square pile with the support wings temporarily fixed by the iron sheet is placed in the hole opened in the ground. Specifically, a part of the iron sheet is glued to the outer wall of the precast hollow square pile, and the other part of the iron sheet is glued to the support wing. The grout in the hole covers the outer wall of the precast hollow square pile. At this time, part of the support wing area is located inside the precast hollow square pile. Holding the vertical limiting rod 202, the expansion... The extension device is lowered into the precast hollow square pile with the lateral limiting rod 201 parallel to the diagonal of the cross-section of the hollow inner hole of the precast hollow square pile, until it is lowered to the point where the hinge of the first hinge rod 101 and the second hinge rod 102 contacts a portion of the support wing located inside the precast hollow square pile. That is, the extension device is locked by the support wing. The telescopic module is activated to push the support wing through the hinge of the first hinge rod 101 and the second hinge rod 102 to push away the temporarily fixed iron plate and continue to push the support wing toward the outer wall of the precast hollow square pile to realize the expansion of the support wing.

[0037] The length of the transverse limiting rod 201 of this utility model is the same as the diagonal length of the cross-section of the hollow inner hole of the precast hollow square pile. When the extension device is placed into the precast hollow square pile, the two ends of the transverse limiting rod 201 along its length direction are in contact with the corresponding adjacent sidewalls of the hollow inner hole of the precast hollow square pile. Therefore, when the transverse limiting rod 201 is lowered into the precast hollow square pile, it is inserted downwards in a state parallel to the diagonal of the cross-section of the hollow inner hole of the precast hollow square pile. This ensures that when the extension device is lowered into the precast hollow square pile, it will only move along the axial direction of the precast hollow square pile and will not slide or rotate horizontally within the precast hollow square pile. Thus, the transverse limiting rod 201 can automatically position the extension device within the diagonal of the cross-section of the hollow inner hole of the precast hollow square pile. When the extension device is working, it can push the support wing to slide smoothly out of the preset track to ensure the stability of the extension device during operation.

[0038] Please see Figure 1 The telescopic module includes a first mounting bracket 301, a second mounting bracket 302, and a telescopic power source 303;

[0039] The fixed end of the telescopic power source 303 is fixedly installed on the first mounting bracket 301, and the extended end of the telescopic power source 303 is fixedly installed on the second mounting bracket 302. The first mounting bracket 301 is located above the second mounting bracket 302.

[0040] In this embodiment, when the telescopic power source 303 is activated, the extended end of the telescopic power source 303 pulls the second mounting bracket 302 to move along the axial direction of the telescopic power source 303.

[0041] Please see Figure 1 and Figure 3 The rotation axis at the hinge of the first hinge rod 101 and the second hinge rod 102 is the first rotation axis, which is perpendicular to the axial direction of the telescopic power source 303.

[0042] In this embodiment, as the first hinge rod 101 and the second hinge rod 102 retract during the retraction of the telescopic power source 303, the hinge joint of the first hinge rod 101 and the second hinge rod 102 gradually moves away from the telescopic power source 303. As the first hinge rod 101 and the second hinge rod 102 extend during the extension of the telescopic power source 303, the hinge joint of the first hinge rod 101 and the second hinge rod 102 gradually moves closer to the telescopic power source 303.

[0043] The telescopic power source 303 of this utility model can move the hinge joint of the first hinge rod 101 and the second hinge rod 102 away from the telescopic power source 303 when it retracts, thereby pushing the support wing out toward the outer wall of the precast hollow square pile through the hinge joint of the first hinge rod 101 and the second hinge rod 102. The structure is ingeniously designed.

[0044] Please see Figure 1 and Figure 3 The first mounting bracket 301 is hinged to the first hinge rod 101, and the rotation axis at the hinge point of the first mounting bracket 301 and the first hinge rod 101 is the second rotation axis, which is parallel to the first rotation axis.

[0045] In this embodiment, when the telescopic power source 303 is activated, the hinge joint between the first mounting bracket 301 and the first hinge rod 101 rotates along the second rotation axis.

[0046] Please see Figure 1 and Figure 3 The second mounting bracket 302 is hinged to the second hinge rod 102, and the rotation axis at the hinge point of the second mounting bracket 302 and the second hinge rod 102 is the third rotation axis, which is parallel to the first rotation axis.

[0047] In this embodiment, when the telescopic power source 303 is activated, the hinge joint of the second mounting bracket 302 and the second hinge rod 102 rotates along the third rotation axis.

[0048] Please see Figure 1 and Figure 2 The transverse limiting rod 201 is fixedly installed on the upper end face of the first mounting bracket 301, and both ends of the transverse limiting rod 201 in the length direction have mutually perpendicular surfaces.

[0049] In this embodiment, when the extension device is placed inside the precast hollow square pile, the two perpendicular surfaces of the transverse limiting rod 201 along its length direction are kept in contact with the two adjacent side walls of the hollow inner hole of the precast hollow square pile and extend into the precast hollow square pile from top to bottom.

[0050] Please see Figure 1 and Figure 2 The lower end of the vertical limiting rod 202 is fixedly installed at one end of the transverse limiting rod 201 along its length, and the upper end of the vertical limiting rod 202 is higher than the upper surface of the transverse limiting rod 201.

[0051] In this embodiment, when the extension device is placed into the precast hollow square pile, the two perpendicular surfaces of the horizontal limiting rod 201 along its length direction are kept in contact with the two adjacent side walls of the hollow inner hole of the precast hollow square pile and extend into the precast hollow square pile from top to bottom. During this process, the vertical limiting rod 202 is slowly lowered manually to lower the hinge joint of the first hinge rod 101 and the second hinge rod 102 to the designated position. Before the telescopic power source 303 is started, the vertical limiting rod 202 is fixed manually. Then the telescopic power source 303 is started and pushes the support wing towards the outer wall of the precast hollow square pile through the hinge joint of the first hinge rod 101 and the second hinge rod 102.

[0052] The structure of the vertical limiting rod 202 is not limited here. For example, if the upper surface of the vertical limiting rod 202 is higher than the upper surface of the precast hollow square pile when the bottommost support wing inside the precast hollow square pile is pushed outwards towards the outer wall of the precast hollow square pile by the expansion device, the vertical limiting rod 202 can be manually and continuously lowered to lower the expansion device. Conversely, if the upper surface of the vertical limiting rod 202 is lower than the upper surface of the precast hollow square pile when the bottommost support wing inside the precast hollow square pile is pushed outwards towards the outer wall of the precast hollow square pile by the expansion device, the vertical limiting rod 202 can be lowered by the expansion device. When constructing the upper surface of the hollow square pile, the vertical limiting rod 202 can be made into a splicable type. Here, a stud can be set on the bottom surface of the upper vertical limiting rod 202, and a threaded hole can be set on the top surface of the lower vertical limiting rod 202. The upper and lower vertical limiting rods 202 can be spliced ​​by connecting the stud with the threaded hole. That is, multiple vertical limiting rods 202 can be spliced ​​up and down until the uppermost vertical limiting rod 202 is higher than the upper surface of the precast hollow square pile.

[0053] When the telescopic power source 303 of this utility model retracts, the hinge joint of the first hinge rod 101 and the second hinge rod 102 pushes the support wing outward toward the outer wall of the precast hollow square pile. The support wing provides a reverse force to the hinge joint of the first hinge rod 101 and the second hinge rod 102, causing the entire extension device to move upward. Therefore, when the telescopic power source 303 is working, the vertical limiting rod 202 extending from the upper end face of the precast hollow square pile is manually fixed to ensure that the extension device does not move upward when working, so that the support wing can accurately and stably push outward toward the outer wall of the precast hollow square pile.

[0054] Please see Figure 1 and Figure 2 The vertical limiting rod 202 has two adjacent side walls that are perpendicular to one end of the transverse limiting rod 201 along its length and are flush with each other.

[0055] In this embodiment, when the extension device is placed inside the precast hollow square pile, the two perpendicular surfaces of the horizontal limiting rod 201 along its length direction are in contact with the two adjacent side walls of the hollow inner hole of the precast hollow square pile and extend into the precast hollow square pile from top to bottom. The two side walls of the vertical limiting rod 202 are in contact with the two adjacent side walls of the hollow inner hole of the precast hollow square pile and extend into the precast hollow square pile from top to bottom.

[0056] Because when the extension device is placed into the precast hollow square pile, two side walls of the vertical limiting rod 202 are in contact with the two side walls adjacent to the hollow inner hole of the precast hollow square pile. Therefore, when the vertical limiting rod 202 is lowered into the precast hollow square pile, it extends into the precast hollow square pile from top to bottom by maintaining contact with the two side walls adjacent to the hollow inner hole of the precast hollow square pile through two of its side walls. Furthermore, the vertical limiting rod 202 is fixedly installed at one end of the transverse limiting rod 201 along its length direction. This ensures that when the extension device is lowered into the precast hollow square pile, it will only move in the axial direction of the precast hollow square pile and will not tip over along the diagonal direction of the cross-section of the hollow inner hole of the precast hollow square pile, thereby ensuring the stability of the extension device during operation.

[0057] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An extension device, characterized in that, The expansion device includes: Telescopic module; A plurality of hinge modules are arranged in a circular array along the axial direction of the telescopic module. Each hinge module includes a first hinge rod and a second hinge rod. One end of the first hinge rod is hinged to the fixed end of the telescopic module, the other end of the first hinge rod is hinged to one end of the second hinge rod, and the other end of the second hinge rod is hinged to the extended end of the telescopic module. A lateral limiting rod is fixedly installed at the fixed end of the telescopic module, and the length direction of the lateral limiting rod is perpendicular to the axial direction of the telescopic module. A vertical limiting rod is fixedly installed on a horizontal limiting rod, and the length direction of the vertical limiting rod is perpendicular to the length direction of the horizontal limiting rod.

2. The extension device according to claim 1, characterized in that: The telescopic module includes a first mounting frame, a second mounting frame, and a telescopic power source; The fixed end of the telescopic power source is fixedly mounted on the first mounting bracket, and the extended end of the telescopic power source is fixedly mounted on the second mounting bracket. The first mounting bracket is located above the second mounting bracket.

3. An extension device according to claim 2, characterized in that: The rotation axis at the hinge of the first hinge rod and the second hinge rod is the first rotation axis, which is perpendicular to the axial direction of the telescopic power source.

4. An extension device according to claim 3, characterized in that: The first mounting bracket is hinged to the first hinge rod, and the rotation axis at the hinge point of the first mounting bracket and the first hinge rod is the second rotation axis, which is parallel to the first rotation axis.

5. An extension device according to claim 3, characterized in that: The second mounting bracket is hinged to the second hinge rod, and the rotation axis at the hinge point of the second mounting bracket and the second hinge rod is the third rotation axis, which is parallel to the first rotation axis.

6. An extension device according to claim 2, characterized in that: The lateral limiting rod is fixedly installed on the upper end face of the first mounting bracket, and both ends of the lateral limiting rod in the length direction have mutually perpendicular surfaces.

7. An extension device according to claim 1, characterized in that: The lower end of the vertical limiting rod is fixedly installed at one end of the horizontal limiting rod along its length, and the upper end of the vertical limiting rod is higher than the upper surface of the horizontal limiting rod.

8. An extension device according to claim 7, characterized in that: The two adjacent sidewalls of the vertical limiting rod are flush with the two surfaces that are perpendicular to one end of the transverse limiting rod along its length.

Images