Hollow concrete pile tensioning die and hollow concrete pile core die tensioning structure

Abstract

According to the hollow concrete pile core mold tensioning structure, a pouring core mold is supported by a tensioning framework, the outer side of the tensioning framework is wrapped with an elastic skin, the elastic skin forms a hollow structure during concrete pouring through circumferential stretching or stretching of the tensioning framework, and the hollow structure is pulled out of a center hole after forming; and pouring forming of the hollow concrete pile is completed, the tensioning framework supports the elastic skin in an attached mode through the multiple inner supporting plates, the inner supporting plates are supported in the radial direction through the jacking structure, and in the process, expansionary force and supporting force of the elastic skin are provided. The pouring core mold is in tensioning fit with the tensioning plate set through the tensioning rod, the tensioning rod is connected with the tensioning adjusting device, the tensioning adjusting device can tighten or loosen the jacking structure, the inner supporting plate is supported or recycled by the jacking structure, and forming of the hollow structure of the hollow concrete pile through the elastic skin is completed. The invention further provides a hollow concrete pile tensioning die.

Description

Technical Field

[0001] The invention relates to the technical field of hollow concrete piles, and more specifically to a hollow concrete pile tensioning mold and a hollow concrete pile core mold tensioning structure. Background Art

[0002] Hollow concrete piles are a type of precast concrete pile with a hollow structure and are widely used in foundation construction of building projects.

[0003] Hollow concrete pile products commonly seen on the market require a core mold in the molding mold. After placing the material in the mold and waiting for the concrete to harden and form, how to quickly remove the core mold is a problem that needs to be solved. Most existing technical solutions use a solution that directly applies a release agent to the outside of the core mold for subsequent removal, but violent removal may cause damage to the concrete pile product, and the existing core mold design is mostly an integral metal design, which is relatively expensive, and how to ensure that the core mold is squeezed by the concrete without deformation and bending is also an aspect that needs to be improved. Summary of the invention

[0004] In view of this, the present invention provides a hollow concrete pile tensioning mold and a hollow concrete pile core mold tensioning structure to improve the preparation capacity of hollow concrete piles.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A hollow concrete pile core mold tensioning structure, comprising a casting core mold and a tensioning plate group for tensioning and adjusting the two ends of the casting core mold in the length direction, wherein the casting core mold has a tensioning skeleton extending in the length direction and an elastic skin covering the outer periphery of the tensioning skeleton;

[0007] The tensioning skeleton comprises a plurality of inner support plates attached to the inner side of the elastic skin, and the inner wall surface of the inner support plate is provided with a support structure for supporting the inner support plate in radial direction;

[0008] The casting core mold also includes tensioning rods extending from both ends of the tensioning skeleton in the length direction. The inner side of the tensioning plate group is also provided with a tensioning adjustment device that is tightly matched with the tensioning rods and tightens or loosens the top support structure through the tensioning rods.

[0009] Preferably, in the above-mentioned hollow concrete pile core form tensioning structure, the top support structure includes a top support rod fixedly mounted on the inner wall surface of the inner support plate, a reducing diameter portion is coaxially arranged in the middle of the top support rod, and a movable portion slidably mounted outside the reducing diameter portion; the tensioning rod is connected to the outer surface of the movable portion.

[0010] Preferably, in the above-mentioned hollow concrete pile core mold tensioning structure, the movable part and the variable diameter part are arranged at one end of the length direction of the top support rod, and buffer springs are arranged at both ends of the sliding direction of the movable part, and the buffer springs are pressed against the axial end of the top support rod.

[0011] Preferably, in the above-mentioned hollow concrete pile core form tensioning structure, the top support structure includes a top support rod fixedly mounted on the inner wall surface of the inner support plate, the tensioning rod includes a first tensioning portion extending from the axial end of the top support rod, and the inner wall surface of the tensioning plate group is provided with a second tensioning portion corresponding to the position of the first tensioning portion;

[0012] It also includes a hard supporting elastic member with a bent structure, and both ends of the supporting elastic member in the length direction are fixedly mounted on the outer peripheral surfaces of the first tensioning portion and the second tensioning portion;

[0013] It also includes a support spring, which is compressed between the axial ends of the first tensioning part and the second tensioning part.

[0014] Preferably, in the above-mentioned hollow concrete pile core form tensioning structure, the top support structure includes a top support rod fixedly mounted on the inner wall surface of the inner support plate, the tensioning rod includes a first tensioning portion extending from the axial end of the top support rod, and the inner wall surface of the tensioning plate group is provided with a second tensioning portion corresponding to the position of the first tensioning portion;

[0015] An L-shaped plug block extends from the outer wall surface of the first tensioning portion, and the L-shaped plug block has a first supporting portion extending radially along the first tensioning portion, and a guiding portion extending axially along the first tensioning portion;

[0016] A second supporting portion extending from the second tensioning portion and located between the guiding portion and the first tensioning portion;

[0017] A buffer spring is arranged between the first supporting part and the second supporting part to buffer the tension and compression between the two parts.

[0018] Preferably, in the above-mentioned hollow concrete pile core form tensioning structure, the top support structure includes a top support rod fixedly mounted on the inner wall surface of the inner support plate, the top support rod is a hollow tubular top support rod, the tensioning rod includes a threaded rod passing through the top support rod, and a connecting nut fixedly mounted on the inner wall surface of the tensioning plate group, and the threaded rod and the connecting nut are threadedly matched;

[0019] The top support rod cooperates with the inner support plate through the threaded rod.

[0020] Preferably, in the above hollow concrete pile core form tensioning structure, a connector is provided in the middle of the threaded rod, the threaded rod comprises a first threaded rod and a second threaded rod, and the ends of the first threaded rod and the second threaded rod are both fixed with a first screw baffle extending in the radial direction;

[0021] The connector comprises a connecting cylinder with a cylindrical structure, a second screw baffle extends out from the inner end surface of the connecting cylinder, and a screw through hole is arranged in the middle of the second screw baffle;

[0022] The threaded rod is also provided with a compression spring which is pressed between the first screw baffle plate and the second screw baffle plate.

[0023] Preferably, in the above-mentioned hollow concrete pile core form tensioning structure, the threaded rod comprises a first threaded rod and a second threaded rod, and the axial ends of the first threaded rod and the second threaded rod are both provided with an annular top support baffle extending in the radial direction, and the outer periphery of the annular top support baffle is supported and matched with the inner wall surface of the top support rod;

[0024] The opposite ends of the first threaded rod and the second threaded rod are both provided with spring support holes, and compression springs are press-fitted in the spring support holes.

[0025] Preferably, in the above-mentioned hollow concrete pile core form tensioning structure, the inner support plate is an L-shaped inner support plate, and the inner support plate includes four inner support plates arranged in a ring matrix, and the elastic skin is mounted on the outer periphery of the four inner support plates.

[0026] A hollow concrete pile tensioning mold comprises a mold body, wherein a plurality of mold grooves for preparing hollow concrete piles are arranged in the mold body, a core mold for forming a hollow structure of the pile body is arranged in the mold groove, and the core mold has the hollow concrete pile core mold tensioning structure as described in any one of the above items.

[0027] The hollow concrete pile core mold tensioning structure provided by the present invention comprises a casting core mold and a tensioning plate group for tensioning and adjusting the two ends of the casting core mold in the length direction. The casting core mold has a tensioning skeleton extending along the length direction and an elastic skin covering the outer periphery of the tensioning skeleton; the tensioning skeleton comprises a plurality of inner support plates attached to and matched with the inner side of the elastic skin, and the inner wall surface of the inner support plate is provided with a supporting structure for radially supporting the inner support plate; the casting core mold also comprises tensioning rods extending from the two ends of the tensioning skeleton in the length direction, and the inner side of the tensioning plate group is also provided with a tensioning adjustment device for tensioning and matching with the tensioning rods, and tightening or loosening the supporting structure through the tensioning rods. When the hollow concrete pile is poured, the tensioning plate group supports the steel cage and tensions the pouring core mold at the same time. The pouring core mold is filled in the middle of the hollow concrete pile during the pouring process. In order to avoid squeezing and deformation of the pouring core mold when filling concrete, the pouring core mold is supported by the tensioning skeleton, and an elastic skin is wrapped on the outside of the tensioning skeleton. Through the circumferential expansion or expansion of the tensioning skeleton, the elastic skin is opened and tensioned during the pouring of concrete, providing stable support for the concrete. After the concrete solidifies, it can be drawn out from the center hole of the formed concrete pile through the contraction of the elastic skin, completing the pouring and forming of the hollow concrete pile. The tensioning skeleton attaches and supports the elastic skin through multiple inner support plates, and the inner support plates are radially supported by the top support structure, providing expansion force and support force for the elastic skin in the process. The casting core mold is tightened and matched with the tensioning plate group through the tensioning rod. The tensioning rod is connected to the tensioning adjustment device. The tensioning adjustment device can tighten or relax the top support structure, so that the top support structure can support or retract the inner support plate, completing the forming of the hollow structure of the hollow concrete pile by the elastic skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A first structural schematic diagram of a hollow concrete pile core mold tensioning structure provided in this application;

[0030] Figure 2 A second structural schematic diagram of the hollow concrete pile core mold tensioning structure provided in this application;

[0031] Figure 3 for Figure 2 A partial enlarged view of the tensile structure of the hollow concrete pile core formwork;

[0032] Figure 4 Figure 4A third structural schematic diagram of the hollow concrete pile core formwork tensioning structure provided in this application;

[0033] Figure 5 for Figure 4 A partial enlarged view of the tensile structure of the hollow concrete pile core formwork;

[0034] Figure 6 A fourth structural schematic diagram of the hollow concrete pile core mold tensioning structure provided in this application;

[0035] Figure 7 for Figure 6 A cross-sectional view of the assembly structure of the middle connector;

[0036] Figure 8 for Figure 6 Schematic diagram of another screw connection structure of the hollow concrete pile core form tensioning structure;

[0037] Fig. 9 for Figure 8 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0038] The invention discloses a hollow concrete pile tensioning mold and a hollow concrete pile core mold tensioning structure, which improve the preparation capacity of the hollow concrete pile.

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1 As shown, Figure 1 This is a first structural schematic diagram of the hollow concrete pile core mold tensioning structure provided in this application.

[0041] The present application provides a hollow concrete pile core mold tensioning structure, including a casting core mold and a tensioning plate group for tensioning and adjusting the two ends of the casting core mold in the length direction. The casting core mold has a tensioning skeleton extending along the length direction and an elastic skin covering the outer periphery of the tensioning skeleton; the tensioning skeleton includes a plurality of inner support plates 1 attached to the inner side of the elastic skin, and the inner wall surface of the inner support plate 1 is provided with a supporting structure for radially supporting the inner support plate 1; the casting core mold also includes tensioning rods extending from the two ends of the tensioning skeleton in the length direction, and the inner side of the tensioning plate group is also provided with a tensioning adjustment device which is tightened with the tensioning rod and tightens or loosens the supporting structure through the tensioning rod.

[0042] When the hollow concrete pile is poured, the tensioning plate group supports the steel cage and tensions the pouring core mold at the same time. The pouring core mold is filled in the middle of the hollow concrete pile during the pouring process. In order to avoid squeezing and deformation of the pouring core mold when filling concrete, the pouring core mold is supported by the tensioning skeleton, and an elastic skin is wrapped on the outside of the tensioning skeleton. Through the circumferential expansion or expansion of the tensioning skeleton, the elastic skin is opened and tensioned during the pouring of concrete, providing stable support for the concrete. After the concrete solidifies, it can be drawn out from the center hole of the formed concrete pile through the contraction of the elastic skin, completing the pouring and forming of the hollow concrete pile. The tensioning skeleton attaches and supports the elastic skin through multiple inner support plates, and the inner support plates are radially supported by the top support structure, providing expansion force and support force for the elastic skin in the process. The casting core mold is tightened and matched with the tensioning plate group through the tensioning rod. The tensioning rod is connected to the tensioning adjustment device. The tensioning adjustment device can tighten or relax the top support structure, so that the top support structure can support or retract the inner support plate, completing the forming of the hollow structure of the hollow concrete pile by the elastic skin.

[0043] During the pouring process, the concrete is subjected to vibration and forming pressure, which squeezes the elastic skin. In order to prevent the elastic skin from collapsing inward, an internal support plate is required to provide stable support force.

[0044] In the present application, the inner support plate 1 is an L-shaped inner support plate, and the inner support plate 1 includes four inner support plates arranged in a ring matrix, and the elastic skin is mounted on the outer periphery of the four inner support plates. Further, the L-shaped inner support plate is made of angle iron.

[0045] The hollow structure of the concrete pile is set as a basic square hollow structure, and the specific inner support plates 1 are four inner support plates arranged in a ring matrix, and the four inner support plates 1 form a basic square structure. The bent inner corner position of the angle iron is integrally formed with a circular rod-shaped structure 2, and the circular rod-shaped structure 2 can be a solid rod or a hollow tube.

[0046] The tension rod is pulled by the tension plate group, and the tension rod can directly pull the circular rod-shaped structure inside the angle iron. The present application further arranges a top support structure inside the inner support plate, and the top support structure maintains the supporting force of the inner support plate.

[0047] The top support structure can be arranged independently with the circular rod structure, or it can be a combined arrangement structure. The support stability of the casting core mold can be improved by cooperating with different top support structures and internal support plate top supports.

[0048] The casting core mold is further explained below.

[0049] In a specific embodiment of the present case, the top support structure includes a top support rod 2 fixedly mounted on the inner wall of the inner support plate, a reducing portion 21 with a reduced size is coaxially arranged in the middle of the top support rod 2, and a movable portion 22 slidably mounted outside the reducing portion 21; a tension rod 23 is connected to the outer surface of the movable portion 22.

[0050] Furthermore, the movable portion 22 and the diameter-changing portion 21 are arranged at one end of the supporting rod 2 in the length direction, and buffer springs 24 are arranged at both ends of the movable portion 22 in the sliding direction. The buffer springs 24 are pressed against the axial end of the supporting rod 2 .

[0051] The inner wall surface of the inner support plate 1 is integrally provided with a top support rod 2, which is a solid rod and can be integrally formed inside the inner support plate 1 of the angle steel structure, or can be fixedly installed on the inner corner side of the angle steel by welding or other methods. By providing the top support rod 2 of the integral structure at the inner corner position of the angle steel structure, the deformation resistance of the angle steel is improved, and the bending deformation of the angle steel toward the inner corner side due to the extrusion of the poured concrete is avoided.

[0052] The top support rod 2 is segmented, with a reducing portion 21 provided at one end in the length direction, the outer diameter of the reducing portion 21 being smaller than the outer diameter of the top support rod 2, a movable portion 22 of a cylindrical structure being sleeved on the outer ring of the reducing portion 21, the movable portion 22 being able to slide on the reducing portion 21, a buffer spring 24 being provided on the reducing portion 21, the buffer spring 24 including two arranged at both ends of the sliding direction of the movable portion 22, and the buffer spring 24 simultaneously abutting against the axial end of the top support rod 2. It can be understood that the top support rod 2 and the reducing portion 21 are coaxially arranged, and the outer diameter of the buffer spring 24 is not larger than the outer diameter of the top support rod 2, then the buffer spring 24 can provide shock absorption and reduce impact during the sliding process of the movable portion.

[0053] The tension rod 23 is integrally connected to the movable part 22, and is connected to a tension plate of the tension plate group through the tension rod 23. The length of the end of the top support rod 2 away from the tension rod 23 is greater than the length of the angle steel. The top support rod 2 is directly connected to another tension plate. Through the sliding of the tension plate, the tension rod 23 pulls the movable part 22 to slide, providing axial traction force to the top support rod 2, so that the angle steel is tensioned in the length direction, providing a stable circumferential support force for the elastic skin, and ensuring the hollow structure stability of the hollow concrete pile. Due to the existence of the buffer spring 24, when pulling and loosening the tension rod, the axial ends of the movable part 22 and the top support rod 2 will not produce hard impact, thereby improving the safety of the tension structure.

[0054] In another specific embodiment, the movable portion 22 and the diameter-changing portion 21 may be disposed at both ends of the top support rod 2 in the length direction, and the top support rod may be stretched by elastically pulling both ends simultaneously.

[0055] like Figure 2 and Figure 3 As shown, Figure 2 A second structural schematic diagram of the hollow concrete pile core mold tensioning structure provided in this application; Figure 3 for Figure 2 A partial enlarged view of the hollow concrete pile core formwork tensioning structure.

[0056] In a specific embodiment of the present case, the top support structure includes a top support rod 2 fixed to the inner wall surface of the inner support plate 1, the tension rod includes a first tensioning portion 31 extending from the axial end of the top support rod 2, and the inner wall surface of the tensioning plate group 3 is provided with a second tensioning portion 32 corresponding to the position of the first tensioning portion 31;

[0057] It also includes a hard supporting elastic member 34 with a bending structure, and both ends of the supporting elastic member 34 in the length direction are fixedly mounted on the outer peripheral surfaces of the first tensioning portion 31 and the second tensioning portion 32;

[0058] The support spring 33 is also included. The support spring 33 is compressed between the axial ends of the first tensioning portion 31 and the second tensioning portion 32 .

[0059] The angle steel can also be directly pulled by the top support rod 2 on the inner wall of the inner angle, and the tension rod extends from the axial end of the top support rod 2. In the preferred structure, the tension rod and the top support rod are an integrated structure, and the tension rod is the part of the top support rod 2 extending from the end of the angle steel.

[0060] The end of the tensioning rod is set as the first tensioning part 31, and the second tensioning part 32 corresponding to the position of the first tensioning part 31 is set on the inner wall surface of the tensioning plate group 3. Specifically, the number of the first tensioning part 31 and the second tensioning part 32 is consistent with the number of angle steels, and can be set to four groups.

[0061] In order to achieve flexible contact between the first tensioning part 31 and the second tensioning part 32 and avoid hard impact during traction and release, the axial ends of the first tensioning part 31 and the second tensioning part 32 are coaxially connected to support springs 34 for elastic buffering during traction and release.

[0062] At the same time, in order to ensure the pulling strength, a support elastic member 34 with a bent structure is provided, and the bent part is used to avoid the support spring 33. In the preferred structure, the support elastic member 34 is a V-shaped structure; in another structure, it can also be set to a U-shaped or trapezoidal structure.

[0063] Two free ends of the supporting elastic member 34 are connected to the first tensioning portion 31 and the second tensioning portion 32 respectively.

[0064] like Figure 4 and Figure 5 As shown, Figure 4 A third structural schematic diagram of the hollow concrete pile core formwork tensioning structure provided in this application; Figure 5 for Figure 4 A partial enlarged view of the hollow concrete pile core formwork tensioning structure.

[0065] In a specific embodiment of the present case, the top support structure includes a top support rod 2 fixed to the inner wall surface of the inner support plate 1, the tension rod includes a first tensioning portion 41 extending from the axial end of the top support rod 2, and the inner wall surface of the tensioning plate group 3 is provided with a second tensioning portion 42 corresponding to the position of the first tensioning portion 41;

[0066] An L-shaped plug block 43 extends from the outer wall of the first tensioning portion 41. The L-shaped plug block 43 has a first support portion 431 extending radially along the first tensioning portion, and a guide portion 432 extending axially along the first tensioning portion 41.

[0067] A second supporting portion 421 extends from the second tensioning portion 42 and is located between the guiding portion 432 and the first tensioning portion 41 ;

[0068] A buffer spring 44 is disposed between the first support portion 431 and the second support portion 421 to buffer tension and compression between the first support portion 431 and the second support portion 421 .

[0069] In this embodiment, the top support rod 2 is a solid rod, and the two ends of the solid rod extend out of the inner support plate 1 to form a first tensioning portion 41. The first tensioning portion 41 is provided with an L-shaped plug 43, and the short side of the L-shaped plug 43 is a first support portion 431, which is fixedly connected to the first tensioning portion 41; the long side is a guide portion 432, which is basically arranged parallel to the top support rod 2, so that the axial end of the top support rod 2 forms a hook-shaped structure. Specifically, a slide groove 434 is provided on the first tensioning portion 41 of the rod-shaped structure, and the L-shaped plug 43 has a structure of a slider that cooperates with the slide groove 434, such as a T-shaped slide groove, a dovetail slide groove, an inverted trapezoidal slide groove, etc., so that a detachable structure is formed between the L-shaped plug 43 and the first tensioning portion 41. A locking nut 433 is also provided at the end of the first tensioning portion 41. After the L-shaped slider 43 is installed in the first tensioning portion 41, the locking nut 433 is used to lock and position the L-shaped plug 43.

[0070] The second tensioning portion 42 is connected to the tensioning plate group 43 by a connecting rod, and a second support portion 421 is set at the protruding end of the connecting rod. The second support portion 421 extends between the guide portion 432 and the top support rod 2. The second support portion 421 and the first support portion 431 form a hook matching structure. A buffer spring 44 is set between the first support portion 431 and the second support portion 421. When the inner support plate 1 is stretched, the first tensioning portion 41 pulls the second tensioning portion 42 to provide stable support for the inner support plate 1, and the buffer spring 44 provides buffering capacity when the first tensioning portion 41 and the second tensioning portion 42 are squeezed against each other.

[0071] like Figure 6 and Figure 7 As shown, Figure 6 A fourth structural schematic diagram of the hollow concrete pile core mold tensioning structure provided in this application; Figure 7 for Figure 6 Cross-sectional view of the assembly structure of the connector.

[0072] In a specific embodiment of the present case, the top support structure includes a top support rod 2 fixedly mounted on the inner wall surface of the inner support plate 1, the top support rod 2 is a hollow tubular top support rod, the tension rod includes a threaded rod 6 passing through the top support rod, and a connecting nut 7 fixedly mounted on the inner wall surface of the tension plate group, and the threaded rod 7 and the connecting nut 7 are threadedly matched;

[0073] The top support rod 2 cooperates with the inner support plate through the threaded rod 6.

[0074] In a specific embodiment of the present case, a connector 8 is provided in the middle of the threaded rod 6, and the threaded rod 6 includes a first threaded rod 61 and a second threaded rod 62, and the ends of the first threaded rod 61 and the second threaded rod 62 are both fixed with a first screw baffle 63 extending radially;

[0075] The connector 8 comprises a connecting cylinder 81 of a cylindrical structure, a second screw baffle 82 extends from the inner end surface of the connecting cylinder, and a screw through hole 83 is arranged in the middle of the second screw baffle 82;

[0076] The threaded rod is also provided with a compression spring 9 which is compressed between the first screw stopper 63 and the second screw stopper 82 .

[0077] The inner support plate is made of angle iron, and a hollow tubular top support rod is arranged on the inner end surface of the angle iron. There are four angle irons, which are arranged relatively to form a rectangular structure. Two threaded rods are sleeved in each angle iron. One end of the threaded rod can be threadedly connected to the tensioning plate, and the other ends of the two threaded rods are installed in the connector 8. The threaded rod in the connector 8 has a first screw baffle 63, and a compression spring 9 is also arranged in the connector 8. The compression spring 9 abuts against the first threaded baffle 63 and the connector 8. The connector 8 is a cylindrical structure, and the connecting cylinder 81 is connected through the screw through hole 83 and the second screw baffle 82 to form a support structure for the compression spring 9.

[0078] like Figure 8 and Fig. 9 As shown, Figure 8 for Figure 6 Schematic diagram of another screw connection structure of the hollow concrete pile core form tensioning structure; Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0079] In a specific embodiment of the present case, the threaded rod includes a first threaded rod 61 and a second threaded rod 62. The axial ends of the first threaded rod 61 and the second threaded rod 62 are both provided with an annular top support baffle 63 extending radially. The outer periphery of the annular top support baffle 63 is supported and matched with the inner wall surface of the top support rod.

[0080] The opposite ends of the first threaded rod 61 and the second threaded rod 62 are both provided with spring support holes, and compression springs 9 are press-fitted into the spring support holes.

[0081] In this embodiment, a connector may not be provided, and a spring is used to connect the ends of the two threaded rods. The first threaded rod and the second threaded rod are arranged substantially coaxially, and spring support holes are provided opposite to each other, and a compression spring is installed inside the compression spring. Annular top support baffles are provided at the opposite ends of the first threaded rod and the second threaded rod, and the annular top support baffles are basically tightly matched with the inner wall of the top support rod to ensure support stability.

[0082] In the above embodiment, the outside of the angle iron is covered with an elastic skin, such as rubber skin, and the outside of the elastic skin is coated with materials such as a release agent. By applying a tensioning force at both ends of the angle iron in the length direction, the angle iron can withstand a certain weight of concrete cement. When demolding is required, the pile product is hardened and formed, and the tensioning mechanism releases the top support rod. The angle iron rebounds under the elastic action of the internal spring structure, which will drive the elastic skin on the outside of the angle iron to move to a certain extent, and then pull it outward through the tensioning device to pull out the angle iron to complete demolding.

[0083] A hollow concrete pile tensioning mold comprises a mold body, wherein a plurality of mold grooves for preparing hollow concrete piles are arranged in the mold body, a core mold for forming a hollow structure of the pile body is arranged in the mold groove, and the core mold has the hollow concrete pile core mold tensioning structure as described in any one of the above items.

[0084] Based on the hollow concrete pile core mold tensioning structure provided in the above embodiment, the present invention also provides a hollow concrete pile tensioning mold, including a mold body, a plurality of mold grooves for preparing hollow concrete piles are arranged in the mold body, a core mold for forming the hollow structure of the pile body is arranged in the mold groove, and the core mold provided on the hollow concrete pile tensioning mold has the hollow concrete pile core mold tensioning structure provided in the above embodiment.

[0085] Since the hollow concrete pile tensioning mold adopts the hollow concrete pile core mold tensioning structure of the above embodiment, please refer to the above embodiment for the beneficial effects brought by the hollow concrete pile core mold tensioning structure of the hollow concrete pile tensioning mold.

[0086] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hollow concrete pile core form tensioning structure, characterized in that: It includes a casting core mold and a tensioning plate group for tensioning and adjusting the two ends of the casting core mold in the length direction. The casting core mold has a tensioning skeleton extending along the length direction and an elastic skin covering the outer periphery of the tensioning skeleton; The tensioning skeleton comprises a plurality of inner support plates attached to the inner side of the elastic skin, and the inner wall surface of the inner support plate is provided with a support structure for supporting the inner support plate in radial direction; The casting core mold also includes tensioning rods extending from both ends of the tensioning skeleton in the length direction. The inner side of the tensioning plate group is also provided with a tensioning adjustment device that is tightly matched with the tensioning rods and tightens or loosens the top support structure through the tensioning rods.

2. The hollow concrete pile core form tensioning structure according to claim 1, characterized in that: The supporting structure includes a supporting rod fixedly mounted on the inner wall of the inner supporting plate, a reducing portion with a reduced diameter is coaxially arranged in the middle of the supporting rod, and a movable portion slidably mounted outside the reducing portion; the tensioning rod is connected to the outer surface of the movable portion.

3. The hollow concrete pile core form tensioning structure according to claim 2, characterized in that: The movable part and the diameter-changing part are arranged at one end of the supporting rod in the length direction, and buffer springs are arranged at both ends of the movable part in the sliding direction, and the buffer springs are pressed against the axial end of the supporting rod.

4. The hollow concrete pile core form tensioning structure according to claim 1, characterized in that: The supporting structure comprises a supporting rod fixed to the inner wall surface of the inner supporting plate, the tensioning rod comprises a first tensioning portion extending from the axial end of the supporting rod, and the inner wall surface of the tensioning plate group is provided with a second tensioning portion corresponding to the position of the first tensioning portion; It also includes a hard supporting elastic member with a bent structure, and both ends of the supporting elastic member in the length direction are fixedly mounted on the outer peripheral surfaces of the first tensioning portion and the second tensioning portion; It also includes a support spring, which is compressed between the axial ends of the first tensioning part and the second tensioning part.

5. The hollow concrete pile core form tensioning structure according to claim 1, characterized in that: The supporting structure comprises a supporting rod fixed to the inner wall surface of the inner supporting plate, the tensioning rod comprises a first tensioning portion extending from the axial end of the supporting rod, and the inner wall surface of the tensioning plate group is provided with a second tensioning portion corresponding to the position of the first tensioning portion; An L-shaped plug block extends from the outer wall surface of the first tensioning portion, and the L-shaped plug block has a first supporting portion extending radially along the first tensioning portion, and a guiding portion extending axially along the first tensioning portion; A second supporting portion extending from the second tensioning portion and located between the guiding portion and the first tensioning portion; A buffer spring is arranged between the first supporting part and the second supporting part to buffer the tension and compression between the two parts.

6. The hollow concrete pile core form tensioning structure according to claim 1, characterized in that: The top support structure includes a top support rod fixedly mounted on the inner wall surface of the inner support plate, the top support rod is a hollow tubular top support rod, the tension rod includes a threaded rod passing through the top support rod, and a connecting nut fixedly mounted on the inner wall surface of the tension plate group, the threaded rod and the connecting nut are threadedly matched; The top support rod cooperates with the inner support plate through the threaded rod.

7. The hollow concrete pile core form tensioning structure according to claim 6, characterized in that: A connector is arranged in the middle of the threaded rod, the threaded rod comprises a first threaded rod and a second threaded rod, and ends of the first threaded rod and the second threaded rod are both fixedly provided with a first screw baffle extending in the radial direction; The connector comprises a connecting cylinder with a cylindrical structure, a second screw baffle extends out from the inner end surface of the connecting cylinder, and a screw through hole is arranged in the middle of the second screw baffle; The threaded rod is also provided with a compression spring which is pressed between the first screw baffle plate and the second screw baffle plate.

8. The hollow concrete pile core form tensioning structure according to claim 6, characterized in that: The threaded rod comprises a first threaded rod and a second threaded rod, and the axial ends of the first threaded rod and the second threaded rod are both provided with an annular top support baffle extending in the radial direction, and the outer periphery of the annular top support baffle is supported and matched with the inner wall surface of the top support rod; The opposite ends of the first threaded rod and the second threaded rod are both provided with spring support holes, and compression springs are press-fitted in the spring support holes.

9. The hollow concrete pile core form tensioning structure according to any one of claims 1 to 8, characterized in that: The inner support plate is an L-shaped inner support plate, and the inner support plate includes four plates arranged in a ring matrix, and the elastic skin is mounted on the outer periphery of the four inner support plates.

10. A hollow concrete pile tensioning mold, comprising a mold body, wherein a plurality of mold grooves for preparing hollow concrete piles are arranged in the mold body, wherein a core mold for forming a hollow structure of a pile body is arranged in the mold groove, wherein: The core mold has a hollow concrete pile core mold tensioning structure as described in any one of claims 1-9.

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