Special mold shell and special mold for square prestressed pile

Abstract

The utility model relates to a formwork special for a square prestressed pile. The formwork comprises a formwork body and a plurality of locking pieces. The cross section of a cavity of the mold shell body is square; the mold shell body is divided into a lower mold shell and an upper mold shell by taking any diagonal line of the cross section of the mold shell body as a symmetry axis; a feeding hole is formed in the upper mold shell in the length direction of the upper mold shell; the outer wall of the lower mold shell and the outer wall of the upper mold shell are each provided with a plurality of semicircular protruding structures, and the semicircular protruding structures on the lower mold shell correspond to the semicircular protruding structures on the upper mold shell in a one-to-one mode to form a circular protruding structure. A plurality of first reinforcing ribs are arranged on the outer wall of the upper mold shell and the outer wall of the lower mold shell in the length direction, and a plurality of second reinforcing ribs are arranged between any two adjacent first reinforcing ribs; the multiple locking pieces are arranged at the splicing position of the upper mold shell and the lower mold shell. The utility model further relates to a die special for the square prestressed pile. According to the utility model, the deformation resistance of the die is effectively improved, and the dimensional accuracy of the formed precast pile is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical connection devices for prefabricated piles, in particular to a special formwork for square prestressed piles. Background Art

[0002] Precast piles are piles that are made in advance and then transported to the construction site. Due to the advance preparation and maintenance of precast piles, their strength can be controlled, so their quality can be better controlled. In addition, the use of precast pile foundations can significantly shorten the construction period, and the project can also be constructed continuously. Concrete precast block molds are molds for finished concrete products that are specially customized according to specific size specifications.

[0003] The Chinese utility model patent with announcement number CN215702623U discloses a mold for prefabricated cement piles, which relates to the field of building construction technology. It includes a rectangular mold body, which is divided into two mold bodies by using any diagonal of its cross section as the axis of symmetry, and a feed port is provided on any mold body. The inner corners of the mold body are all rounded, and the joints of the two mold bodies are provided with a number of locking components. The mold for prefabricated cement piles set up as above can ensure that the outer side of the finished cement pile remains flat after demoulding, and there are no defects such as pits, which does not affect the normal use of the finished cement pile. However, the two mold bodies in the above mold are not convenient to splice, which makes demoulding inconvenient. In addition, the concrete expands when solidifying. Although the strength of the mold body can be improved to a certain extent by simply setting reinforcing ribs on the outer wall of the mold body, it still has a certain impact on the size of the square prestressed pile after forming.

[0004] It is hoped to provide a special formwork and a special mold for square prestressed piles, which can solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model aims to provide a special mold shell for square prestressed piles, which effectively improves the anti-deformation ability of the mold and ensures the dimensional accuracy of the formed prefabricated piles.

[0006] In order to achieve the purpose of the above utility model, a special formwork for square prestressed piles is provided, comprising a formwork body and a plurality of locking members;

[0007] The cavity cross section of the mold shell body is square;

[0008] The mold shell body is divided into two mold bodies by taking any diagonal line of its cross section as the axis of symmetry;

[0009] The mold body located at the bottom is the lower mold shell, and the other mold body is the upper mold shell;

[0010] The upper mold shell is provided with a feed port along its length direction;

[0011] A plurality of semicircular protrusion structures are provided on the outer walls of the lower mold shell and the upper mold shell, and the semicircular protrusion structures on the lower mold shell correspond one-to-one with the semicircular protrusion structures on the upper mold shell to form a circular protrusion structure;

[0012] The outer wall of the upper mold shell and the outer wall of the lower mold shell are both provided with a plurality of first reinforcing ribs along their length direction, and a plurality of second reinforcing ribs are provided between any two adjacent first reinforcing ribs;

[0013] A plurality of locking members are arranged at the joint of the upper mold shell and the lower mold shell.

[0014] Preferably, the semicircular protruding structures on the upper mold shell and the semicircular protruding structures on the lower mold shell are arranged at equal intervals.

[0015] Preferably, there is a distance between the feed port on the upper mold shell and the edge of the outer wall plane where the feed port is located.

[0016] Specifically, the locking member includes a rotating shaft, a screw rod and a nut;

[0017] The outer walls of the upper mold shell and the lower mold shell at the joint are both recessed inward to form a plurality of recessed grooves;

[0018] The concave groove of the upper mold shell corresponds to the concave groove of the lower mold shell one by one;

[0019] The rotating shaft is rotatably arranged on the outer wall of the lower mold base and is located just below any concave groove of the lower mold shell;

[0020] One end of the bottom of the screw is fixed on the rotating shaft, and the rotation trajectory of the screw just passes through a group of corresponding recessed grooves on the lower mold shell and the upper mold shell;

[0021] The nut is sleeved on the upper part of the screw rod.

[0022] Preferably, the inner corners of the cavity of the mold shell body are rounded.

[0023] Preferably, a plurality of third reinforcing ribs are provided on the outer wall of the upper mold shell located on the feed port side.

[0024] Another object of the utility model is to provide a special mold for square prestressed piles, including the special mold shell for square prestressed piles.

[0025] Further, it also includes two cover plates and a pre-tensioned member;

[0026] The two cover plates are detachably fixed to the two ends of the mold shell body;

[0027] Any of the cover plates is provided with a plurality of threaded through holes for connecting the end plates at any end of the precast pile framework;

[0028] The other cover plate has a through hole at the center position;

[0029] The pre-tensioned member comprises a lead screw, a locking nut and a tensioning plate;

[0030] The lead screw passes horizontally through the through hole of the other cover plate;

[0031] The tensioning plate is vertically fixed to one end of the lead screw located inside the mold shell body;

[0032] The locking nut is sleeved on the lead screw and is located outside the mold shell body.

[0033] Furthermore, the tensioning plate is detachably fixed to one end of the lead screw located inside the mold shell body.

[0034] Compared with the prior art, the utility model has the following advantages:

[0035] (1) By providing a one-to-one corresponding semicircular protrusion structure on the outside of the upper mold shell and the lower mold shell, a circular protrusion structure is formed, which plays a clamping role and cooperates with the reinforcing ribs to effectively prevent the mold shell from deforming;

[0036] (2) The semicircular raised structure helps the lower mold base rotate, which is convenient for material removal; in addition, the ends of the semicircular raised structures corresponding to the upper mold shell and the lower mold shell can also play a positioning role, which is convenient for quickly splicing the upper mold shell and the lower mold shell;

[0037] (2) Simple structure and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural diagram of a special formwork for square prestressed piles according to Example 1;

[0039] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0040] Figure 3 is a schematic structural diagram of the locking member in Example 1;

[0041] Figure 4 This is a structural schematic diagram of a special mold for square prestressed piles in Example 2;

[0042] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0043] Figure 6 A schematic diagram of placing several special molds in Example 2 in a steam pool;

[0044] Figure 7Schematic diagram of the mold of ordinary square prefabricated piles in Example 2. DETAILED DESCRIPTION

[0045] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] Example 1.

[0047] like Figure 1 A special formwork for square prestressed piles in this embodiment includes a formwork body and a plurality of locking parts.

[0048] The cavity cross section of the mold shell body is square; the mold shell body is divided into two mold bodies by taking any diagonal line of its cross section as the axis of symmetry; the mold body located at the bottom is the lower mold shell 1, and the other mold body is the upper mold shell 2.

[0049] The upper mold shell 2 is provided with a feed port 3 along its length direction.

[0050] The outer walls of the lower mold shell 1 and the upper mold shell 2 are both provided with a plurality of semicircular protrusion structures 4, and the semicircular protrusion structures on the lower mold shell 1 correspond one-to-one with the semicircular protrusion structures on the upper mold shell 2 to form a circular protrusion structure. In this embodiment, the semicircular protrusion structures on the upper mold shell 2 and the semicircular protrusion structures on the lower mold shell 1 are arranged at equal intervals. The ends of the semicircular protrusion structures 4 corresponding to the upper mold shell 2 and the lower mold shell 1 can also play a positioning role, so as to facilitate and quickly splice the upper mold shell and the lower mold shell.

[0051] At the same time, the two corresponding semicircular protruding structures 4 form a circular protruding structure, which plays the role of holding the mold shell body tightly and effectively preventing the mold shell body from deforming.

[0052] A plurality of first reinforcing ribs 5 are disposed on the outer wall of the upper mold shell 2 and the outer wall of the lower mold shell 1 along the length direction thereof, and a plurality of second reinforcing ribs 6 are disposed between any two adjacent first reinforcing ribs 5 .

[0053] The locking members 7 are arranged at the joint of the upper mold shell and the lower mold shell, which can prevent the cement from expanding in the mold body during the prefabrication of the square prestressed piles, resulting in the separation of the two mutually spliced ​​mold bodies, affecting the prefabrication of the square prestressed piles. The arranged locking members 7 can ensure the connection strength between the upper mold shell 2 and the lower mold shell 1.

[0054] In this embodiment, if Figure 3As shown, the locking member 7 includes a rotating shaft 9, a screw 10 and a nut 11; the outer walls of the upper mold shell 2 and the lower mold shell 1 at the joint are both recessed inward to form a plurality of recessed grooves (not shown in the figure); the recessed grooves of the upper mold shell 2 correspond to the recessed grooves of the lower mold shell 1 one by one; the rotating shaft 9 is rotatably set on the outer wall of the lower mold base 1, and is just located directly below any recessed groove of the lower mold shell 1; one end of the bottom of the screw 10 is fixed on the rotating shaft 9, and the rotating trajectory of the screw 10 just passes through a corresponding set of recessed grooves on the lower mold shell 1 and the upper mold shell 2; the nut 11 is sleeved on the upper part of the screw 10; in this way, when the upper mold shell 2 and the lower mold shell 1 are spliced, the rotating shaft 9 is rotated so that the screw 10 on the rotating shaft 9 falls into the corresponding recessed grooves of the upper mold shell 2 and the lower mold shell 1, and the nut 11 is tightened to complete the locking work of a locking member 7. This makes the splicing, fixing and disassembly of the upper mold shell 2 and the lower mold shell 1 very quick.

[0055] In this embodiment, if Figure 2 As shown, there is a distance between the feed port 3 on the upper mold shell 2 and the edge of the outer wall plane where it is located. This arrangement ensures that the two sides of the square prestressed pile formed at the feed port are flat, and all four sides are subjected to force during forming, effectively ensuring its strength.

[0056] In this embodiment, the inner corners of the cavity of the mold shell body are rounded, so that the corners of the formed square prestressed piles are not easily worn and damaged by the wound wire rope during the hoisting process at the construction site.

[0057] In this embodiment, a plurality of third reinforcing ribs 8 are provided on the outer wall of the upper mold shell 2 located on the side of the feed port 3, which effectively improves the strength of the outer wall of the upper mold shell 2 located on the feed port 3 and effectively prevents the outer wall of the upper mold shell 2 located on the feed port 3 from deforming.

[0058] Example 2

[0059] like Figure 4 As shown, a special mold for square prestressed piles includes the special mold shell described in Example 1, and also includes two cover plates 12 and pre-tensioning members; the two cover plates 12 are detachably fixed at both ends of the mold shell body. Any of the cover plates 12 has a plurality of threaded holes 13 for connecting the end plates at either end of the precast pile skeleton. The center position of the other cover plate has a through hole.

[0060] The pre-tensioned member includes a lead screw 14, a locking nut 15 and a tensioning plate 16; the lead screw 14 horizontally passes through the through hole of another cover plate; Figure 5 As shown, the tensioning plate 16 is vertically fixed to one end of the lead screw 14 located inside the mold shell body; the locking nut 15 is sleeved on the lead screw 14 and is located outside the mold shell body.

[0061] In this embodiment, the tensioning plate 16 is detachably fixed to one end of the lead screw 14 located inside the mold shell body, which is convenient for disassembly and maintenance.

[0062] When the above-mentioned special mold is working, the precast pile skeleton is first placed in the lower mold shell 1, and the tensioning member is placed in the lower mold shell 1, the upper mold shell 2 is installed, and the locking member 7 is locked, and two cover plates 12 are installed, and the cover plate at any end is fixed with the end plate at one end of the precast pile skeleton by bolts, and the end plate at the other end of the precast pile skeleton is fixed with the tensioning plate by bolts; then the lead screw 14 is pulled outward by external equipment to make the steel bars of the precast pile skeleton straight, and finally the locking nut 15 is tightened, and the worker can feed concrete through the feed port of the upper mold shell. After the square prestressed pile is formed, the mold with the square prestressed pile is placed in the steam pool for heating by the crane, and finally dropped out. After cooling, the locking member 7 and the two cover plates 12 are opened, and the crane is lifted onto the upper mold shell 2. Due to the provision of the semicircular raised structure 4, it is easy to rotate the lower mold shell 1 and take out the formed square prestressed pile.

[0063] Here, the inventor needs to explain that when the steam pool is heated, a plurality of V-shaped workstations are provided at the bottom of the steam pool, and the mold is as follows: Figure 6 They are stacked one after another, leaving gaps to facilitate crane lifting after heating is completed, and the stacked special molds are also stable.

[0064] The square prestressed pile prepared by the special mold provided by the utility model has a square cross section, and the four sides thereof are stressed during the preparation process, and the strength is high, while the mold of the ordinary square prefabricated pile is Figure 7 As shown, in order to facilitate demoulding, the bottom is small and the top is large. The cross-section of the prepared prefabricated pile is a trapezoidal structure, and during the preparation process, it is subjected to force on three sides. During construction and installation, the force is uneven, and the edges and corners of the prepared square prefabricated piles are right angles. The steel wire rope used for hoisting and bundling during transportation or construction and installation can easily wear out the edges and corners.

[0065] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all within the scope defined by the claims of this application.

Claims

1. A special formwork for square prestressed piles, characterized in that: It includes a mold shell body and a plurality of locking parts; The cavity cross section of the mold shell body is square; The mold shell body is divided into two mold bodies by taking any diagonal line of its cross section as the axis of symmetry; The mold body located at the bottom is the lower mold shell, and the other mold body is the upper mold shell; The upper mold shell is provided with a feed port along its length direction; A plurality of semicircular protrusion structures are provided on the outer walls of the lower mold shell and the upper mold shell, and the semicircular protrusion structures on the lower mold shell correspond one to one with the semicircular protrusion structures on the upper mold shell to form a circular protrusion structure; The outer wall of the upper mold shell and the outer wall of the lower mold shell are both provided with a plurality of first reinforcing ribs along their length direction, and a plurality of second reinforcing ribs are provided between any two adjacent first reinforcing ribs; A plurality of locking members are arranged at the joint of the upper mold shell and the lower mold shell.

2. A special formwork for square prestressed piles as claimed in claim 1, characterized in that: The semicircular convex structures on the upper mold shell and the semicircular convex structures on the lower mold shell are arranged at equal intervals.

3. A special formwork for square prestressed piles as claimed in claim 1 or 2, characterized in that: A distance is left between the feed opening on the upper mold shell and the edge of the outer wall plane where the feed opening is located.

4. A special formwork for square prestressed piles as claimed in claim 1, characterized in that: The locking member comprises a rotating shaft, a screw rod and a nut; The outer walls of the upper mold shell and the lower mold shell at the joint are both recessed inward to form a plurality of recessed grooves; The concave groove of the upper mold shell corresponds to the concave groove of the lower mold shell one by one; The rotating shaft is rotatably arranged on the outer wall of the lower mold base and is located just below any concave groove of the lower mold shell; One end of the bottom of the screw is fixed on the rotating shaft, and the rotation trajectory of the screw just passes through a group of corresponding recessed grooves on the lower mold shell and the upper mold shell; The nut is sleeved on the upper part of the screw rod.

5. A special formwork for square prestressed piles as claimed in claim 1, characterized in that: The inner corners of the cavity of the mold shell body are all rounded.

6. A special formwork for square prestressed piles as claimed in claim 3, characterized in that: A plurality of third reinforcing ribs are provided on the outer wall of the upper mold shell located on the side of the feed port.

7. A special mold for square prestressed piles, characterized in that: It comprises the special formwork for square prestressed piles as described in any one of claims 1 to 6.

8. A special mold for square prestressed piles as claimed in claim 7, characterized in that: Also included are two cover plates and pre-tensioned parts; The two cover plates are detachably fixed to the two ends of the mold shell body; Any of the cover plates is provided with a plurality of threaded through holes for connecting the end plates at any end of the precast pile framework; The other cover plate has a through hole at the center position; The pre-tensioned member comprises a lead screw, a locking nut and a tensioning plate; The lead screw passes horizontally through the through hole of the other cover plate; The tensioning plate is vertically fixed to one end of the lead screw located inside the mold shell body; The locking nut is sleeved on the lead screw and is located outside the mold shell body.

9. A special mold for square prestressed piles as claimed in claim 8, characterized in that: The tensioning plate is detachably fixed to one end of the lead screw located inside the mold shell body.

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