Concrete precast pile mold and special-shaped pile

Abstract

The invention provides a concrete precast pile mold and a special-shaped pile, the concrete precast pile mold comprises a split mold and an embedded body, the split mold comprises an upper mold and a lower mold; the upper mold and the lower mold are closed through a mold closing device to form a first mold cavity; a plurality of embedded bodies are axially distributed in the first mold cavity at intervals, and the embedded bodies form a second mold cavity; the embedded body comprises an inner mold plate, and the inner mold plate is embedded into the inner wall face of the first mold cavity and used for enabling the outline of the second mold cavity to be tangent to the outline of the first mold cavity or enabling the outline of the second mold cavity and the outline of the first mold cavity to have a distance within an allowable range; an outer mold plate is arranged in the upper mold or the lower mold, mounting grooves are formed in the outer mold plate at intervals in the axial direction, and the outer mold plate after mold closing forms a first mold cavity; the inner formwork is embedded into the mounting groove, the sealing plate is arranged at the bottom of the outer formwork and located at the mounting groove, the inner formwork can be conveniently embedded into the outer formwork, old pipe piles can be used for transformation, new special-shaped pile molds do not need to be produced, and the production and manufacturing cost of precast piles is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of building material production, and particularly to a concrete precast pile mold and a special-shaped pile. Background Art

[0002] Pre-stressed concrete solid square piles are widely used in the pile foundation projects of industrial and civil buildings, and have the advantages of high bearing capacity, good impact resistance, and good corrosion resistance. When producing pre-stressed concrete solid square piles, a tensile force needs to be applied to the main reinforcement in advance, and then concrete is poured. After the concrete dries and hardens, a pre-compression stress can be formed. Pre-stressed concrete solid square piles can usually apply prestress in two forms: long-line method tensioning and mold method tensioning; the long-line method tensioning requires a large site on site, is not conducive to assembly line production, and has a slow production rhythm; the mold method tensioning uses a steel mold to provide the reaction force of the pre-applied force, can realize factory flow production, and has high production efficiency, which is a more mainstream production mode for pre-stressed concrete solid square piles.

[0003] With the development of pile-making technology, customers have an increasing need for concrete precast piles with special-shaped cross-sections. The molds for concrete precast piles with special-shaped cross-sections need to be made separately, which is expensive in manufacturing cost, and will result in the appearance of a large number of molds for different types of special-shaped piles, resulting in low utilization rate. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a concrete precast pile mold and a special-shaped pile, which can utilize the existing mold, install an insert in the existing mold to form a second mold cavity, and make the contour of the second mold cavity tangent to the contour of the first mold cavity or have a spacing within an allowable range, so that there is no need to produce a new special-shaped pile mold, and the manufacturing cost of precast pile production is reduced.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] A concrete precast pile mold includes a split mold and an insert. The split mold includes an upper mold and a lower mold; the upper mold and the lower mold are closed by a mold closing device to form a first mold cavity; a plurality of inserts are axially and spacedly distributed in the first mold cavity, and the inserts form a second mold cavity; the insert includes an inner template, and the inner template is embedded in the inner wall surface of the first mold cavity for making the contour of the second mold cavity tangent to the contour of the first mold cavity or having a spacing S within an allowable range;

[0007] An outer template is provided inside the upper die or the lower die. Installation grooves are axially and spacedly formed on the outer template. After mold closing, the outer template constitutes a first mold cavity. The inner template is embedded in the installation groove, and a U-shaped closing plate is arranged outside the outer template to enclose the installation groove within the U-shaped closing plate. It is convenient for the inner template to be embedded into the outer template, and at the same time, the depth and width of the installation groove can be controlled, so that the contour of the second mold cavity is tangent to the contour of the first mold cavity or has a spacing S within an allowable range. In this way, the present invention does not need to produce a new special-shaped pile mold, reducing the manufacturing cost of precast piles.

[0008] Further, the U-shaped closing plate is arranged along the entire length direction of the outer template.

[0009] Further, the U-shaped closing plates are spacedly arranged on the outer template, and the length of the U-shaped closing plate is greater than or equal to the length of its corresponding installation groove.

[0010] Further, a support rib assembly is arranged in the cavity between the inner template and the outer template, which can ensure the strength of the inner template and prevent the deformation of the inner template during the pouring process.

[0011] Further, the first mold cavity is a square mold cavity, a parting surface is formed at the joint of the upper die and the lower die, and a sealing plate assembly is installed at the edge of the cavity between the inner template and the outer template. The sealing plate assembly includes a first sealing plate located at the parting surface and a second sealing plate located at the end face of the inner template. The outer surface of the second sealing plate forms an angle of 30° - 60° with the parting surface, and the inner surface of the second sealing plate is perpendicular to the parting surface.

[0012] Further, the inner template is a semi-circular template.

[0013] Further, by embedding the inner template into the installation groove, the inner wall surface of the inner template is tangent to the inner wall surface of the outer template, so that the contour of the second mold cavity is inscribed with the contour of the first mold cavity.

[0014] Further, by embedding the inner template into the installation groove, a spacing is provided between the inner wall surface of the inner template and the inner wall surface of the outer template, so that there is a spacing S within an allowable range between the contour of the second mold cavity and the contour of the first mold cavity.

[0015] Further, a gap is provided between the inner template and the installation groove. When demolding, the inner template generates displacement deformation at the gap for smooth demolding. Because the inner template can have a small deformation when the precast concrete pile is demolded, the mold can change from a round semi-circle to an oval with a large opening at the moment of demolding, so that the parts with approximately straight edges on both sides of the mold become inclined planes, achieving the effect of smooth demolding.

[0016] A special-shaped pile, which is a special-shaped pile produced by using the concrete precast pile mold described above.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. In the concrete precast pile mold of the present invention, an insert is installed in the existing mold to form a second mold cavity, such that the contour of the second mold cavity is tangent to the contour of the first mold cavity or has a spacing within an allowable range. In this way, there is no need to produce a new special-shaped pile mold, reducing the manufacturing cost of precast piles. There is no need to modify the existing square pipe mold too much, which can increase the timeliness of mold production and can remove the insert to restore the original square mold cavity.

[0019] 2. The concrete precast pile mold of the present invention can use the centrifugal process to produce precast concrete piles with a square-round alternating shape.

[0020] 3. In the concrete precast pile mold of the present invention, mounting grooves are axially spaced on the outer template, and the inner template is embedded in the mounting grooves, which is convenient for the inner template to be embedded in the outer template. At the same time, by controlling the depth and width of the mounting grooves, the contour of the second mold cavity can be tangent to the contour of the first mold cavity or have a spacing within an allowable range, meeting the needs of different customers for special-shaped piles.

[0021] 4. In the concrete precast pile mold of the present invention, there is a gap between the inner template and the mounting groove. By utilizing the fact that the inner template can have a slight deformation when the precast concrete pile is demolded, the mold can be changed from a round semi-circular shape to an elliptical shape with a large opening at the moment of demolding, so that the parts of the two sides of the mold with approximately straight edges become inclined planes, achieving the effect of smooth demolding. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, it is obvious that other drawings can also be obtained according to these drawings.

[0023] Figure 1 It is the general drawing of the concrete precast pile mold of the present invention.

[0024] Figure 2 It is the schematic diagram of the sealing plate assembly of the present invention.

[0025] Figure 3 It is the cross-sectional view of the lower mold of the present invention.

[0026] Figure 4 It is the schematic diagram of the inner wall surface of the inner template being tangent to the inner wall surface of the outer template in an embodiment.

[0027] Figure 5 It is the schematic diagram of a spacing being provided between the inner wall surface of the inner template and the inner wall surface of the outer template in another embodiment.

[0028] Figure 6 It is a schematic diagram showing a gap between the inner template and the installation groove in another embodiment.

[0029] In the figure:

[0030] 1 - upper die; 2 - lower die; 3 - inner template; 4 - outer template; 5 - U-shaped closing plate; 6 - closing plate assembly; 6-1 - first closing plate; 6-2 - second closing plate; 7 - installation groove; 10 - die closing device; 3-1 - inner wall surface of the inner template; 4-1 - inner wall surface of the outer template. Specific embodiments

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the present invention, unless otherwise clearly specified and defined, the terms "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Such as Figure 1 and Figure 2As shown in the figure, the precast concrete pile mold of the present invention includes a split mold and an insert. After the split mold is closed, a first mold cavity is formed; a number of inserts are axially spaced in the first mold cavity, and the inserts form a second mold cavity; the insert includes an inner template 3, and the inner template 3 is embedded in the inner wall surface of the first mold cavity to make the contour of the second mold cavity tangent to the contour of the first mold cavity or have a spacing S within an allowable range. In this way, the mold with a single mold cavity can be modified without producing a new special-shaped pile mold, reducing the manufacturing cost of precast piles. The split mold includes an outer template 4, and the outer template 4 after closing forms the first mold cavity; installation grooves 7 are axially spaced on the outer template 4, and the inner template 3 is embedded in the installation grooves 7. A support rib assembly is provided in the cavity between the inner template 3 and the outer template 4, and a U-shaped closing plate 5 is provided outside the outer template 4. The U-shaped closing plate 5 is located at the installation groove 7. While closing the installation groove 7, the U-shaped closing plate 5 and the outer mold 4 form an integral body to strengthen the strength of the outer template 4 at the installation groove 7. A sealing plate assembly 6 is installed at the edge of the cavity between the inner template 3 and the outer template 4.

[0035] Embodiment

[0036] As Figure 2 and Figure 3 As shown in the figure, in the precast concrete pile mold in the embodiment, it includes a split mold and an insert. The split mold includes an upper mold 1 and a lower mold 2; after the upper mold 1 and the lower mold 2 are closed through a closing device 10, a square mold cavity is formed, and a parting surface is formed at the joint of the upper mold 1 and the lower mold 2.

[0037] The structures of the upper mold 1 and the lower mold 2 are the same. Taking the lower mold 2 as an example for specific description, as Figure 3 shown, an outer template 4 is provided in the lower mold 2. The cross-section of the outer template 4 is an L shape with equal side lengths, and the two ends of the outer template 4 are provided with flanges. The contact surface of the flange at the outer template 4 of the upper mold 1 and the flange at the outer template 4 of the lower mold 2 is the parting surface. At the parting surface, the flanges at the outer template 4 of the upper mold 1 and the flanges at the outer template 4 of the lower mold 2 are respectively provided with rabbet structures, and the flanges at the outer template 4 of the upper mold 1 and the flanges at the outer template 4 of the lower mold 2 can be locked through the closing device.

[0038] Installation grooves 7 are axially spaced on both sides of the outer template 4 respectively. The installation grooves 7 can be rectangular or special-shaped. The purpose is to embed the inner template 3 into the installation grooves 7. A U-shaped closing plate 5 is provided at the bottom of the outer template 4. The U-shaped closing plate 5 is located at the installation groove 7. The U-shaped closing plate 5 is arranged along the entire length direction of the outer template 4. The U-shaped closing plates 5 are spaced on the outer template 4, and the length of the U-shaped closing plate 5 is greater than or equal to the length of its corresponding installation groove 7. The side wall of the outer template 4 is connected to the frame of the lower mold 2 through the U-shaped closing plate 5. The U-shaped closing plate 5 can be a channel steel, an I-beam or other welded structural parts.

[0039] As shown Figure 2 in the figure, the inner template 3 is a template with a semi-circular cross-section. Support ribs are provided in the bottom cavity between the inner template 3 and the outer template 4, and a sealing plate assembly 6 is installed at the edge of the cavity between the inner template 3 and the outer template 4. The sealing plate assembly 6 is composed of several plates. In the embodiment, the sealing plate assembly includes a first sealing plate 6-1 at the parting surface and a second sealing plate 6-2 at the end face of the inner template. The outer surface of the second sealing plate 6-2 forms an angle of 30°-60° with the parting surface, and the inner surface of the second sealing plate 6-2 is perpendicular to the parting surface. The second sealing plate 6-2 is of a triangular structure. The first sealing plate 6-1 is trapezoidal and is flush with the upper end surface of the outer template 4, so that a tapered shape can be formed between the manufactured circular cross-section pile segment and the square cross-section pile segment. The second sealing plate 6-2 is integrally machined, and has a higher precision than the steel plate bending during actual use.

[0040] An implementation method, as shown Figure 4 in the figure, by embedding the inner template 3 into the installation groove 7, the inner wall surface 3-1 of the inner template of the inner template 3 is tangent to the inner wall surface 4-1 of the outer template of the outer template 4, so as to make the second mold cavity contour be inscribed with the first mold cavity contour, as shown Figure 3 in the figure. In this way, the outer contour of the manufactured circular pile segment can be inscribed with the outer contour of the square pile segment.

[0041] Another implementation method, as shown Figure 5 in the figure, by embedding the inner template 3 into the installation groove 7, a spacing S is provided between the inner wall surface 3-1 of the inner template of the inner template 3 and the inner wall surface 4-1 of the outer template of the outer template 4, so as to make a spacing S within an allowable range between the second mold cavity contour and the first mold cavity contour. The spacing S within the allowable range is generally considered as the spacing required by the design or the spacing specified in the design drawing. However, the more important purpose of the spacing S within the allowable range of the present invention is to utilize the strain during the concrete pouring and solidification process to cause the inner template 3 to deform. This is because the inner template 3 is embedded in the outer template 4 and is only welded at some segments of the edge of the installation groove, so that a margin for local deformation of the inner template 3 is given. By utilizing the strain generated during the concrete pouring and solidification process, the inner template 3 deforms outward, so that the outer contour of the manufactured circular pile segment is inscribed with the outer contour of the square pile segment. If the inner wall surface 3-1 of the inner template of the inner template 3 in the mold is tangent to the inner wall surface 4-1 of the outer template of the outer template 4, the strain during the concrete pouring and solidification process is not considered, and in actual production, the outer contour of the circular pile segment will exceed the outer contour of the square pile segment, and the excess part needs to be removed later.

[0042] Another implementation method, as shown Figure 6As shown, a gap M is provided between the inner template 3 and the installation groove 7, that is, the outer wall surface of the inner template 3 does not contact the contour of the installation groove 7, and there is a gap M. By using the support ribs and the sealing plate assembly 6, the gap M between the inner template 3 and the installation groove 7 can be ensured, and at the same time, the strength of the inner template 3 is not affected. By using the gap M between the inner template 3 and the installation groove 7, the inner template 3 can have a small deformation when the concrete precast pile is demolded, and the mold can be changed from a round semi-circular shape to an elliptical shape with a large opening at the moment of demolding, so that the parts of the two sides of the mold with approximately straight edges become inclined surfaces, achieving the effect of smooth demolding.

[0043] A special-shaped pile, a special-shaped pile produced by using the concrete precast pile mold described above.

[0044] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0045] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A precast concrete pile mold, characterized in that, It includes a split mold and an insert. The split mold includes an upper mold (1) and a lower mold (2); after the upper mold (1) and the lower mold (2) are clamped by a clamping device (10), a first mold cavity is formed; several inserts are axially and spacedly distributed in the first mold cavity, and the inserts form a second mold cavity; the insert includes an inner template (3), and the inner template (3) is embedded in the inner wall surface of the first mold cavity to make the contour of the second mold cavity tangent to the contour of the first mold cavity or have a spacing S within an allowable range. An outer template (4) is provided in the upper mold (1) or the lower mold (2). Installation grooves (7) are axially and spacedly opened on the outer template (4). After clamping, the outer template (4) forms the first mold cavity; the inner template (3) is embedded in the installation groove (7), and a U-shaped closing plate (5) is provided outside the outer template (4) to enclose the installation groove (7) within the U-shaped closing plate (5).

2. The precast concrete pile mold according to claim 1, wherein, The U-shaped closing plate (5) is arranged along the entire length direction of the outer template (4).

3. The concrete precast pile mold according to claim 1, wherein, The U-shaped closing plates (5) are spacedly arranged on the outer template (4), and the length of the U-shaped closing plate (5) is greater than or equal to the length of its corresponding installation groove (7).

4. The precast concrete pile mold according to claim 1, characterized in that, A support rib assembly is provided in the cavity between the inner template (3) and the outer template (4).

5. The precast concrete pile mold according to claim 1, characterized in that, The first mold cavity is a square mold cavity, and a parting surface is formed at the joint of the upper mold (1) and the lower mold (2). A sealing plate assembly (6) is installed at the edge of the cavity between the inner template (3) and the outer template (4); the sealing plate assembly (6) includes a first sealing plate (6-1) located at the parting surface and a second sealing plate (6-2) located at the end face of the inner template. The outer surface of the second sealing plate (6-2) forms an angle of 30°-60° with the parting surface, and the inner surface of the second sealing plate (6-2) is perpendicular to the parting surface.

6. The precast concrete pile mold according to claim 1, characterized in that The inner template (3) is a semi-circular template.

7. The concrete precast pile mold according to claim 1, wherein, By embedding the inner template (3) into the installation groove (7), the inner wall surface (3-1) of the inner template of the inner template (3) is tangent to the inner wall surface (4-1) of the outer template of the outer template (4) to make the contour of the second mold cavity internally tangent to the contour of the first mold cavity.

8. The precast concrete pile mold according to claim 1, characterized in that, By embedding the inner template (3) into the installation groove (7), a spacing S within an allowable range is provided between the inner wall surface (3-1) of the inner template of the inner template (3) and the inner wall surface (4-1) of the outer template of the outer template (4) to make the outer contour of the pile manufactured by the second mold cavity tangent to the outer contour of the pile manufactured by the first mold cavity.

9. The precast concrete pile mold according to claim 1, characterized in that, A gap is provided between the inner template (3) and the installation groove (7). When demolding, the inner template (3) generates displacement deformation at the gap for smooth demolding.

10. A special-shaped pile, characterized in that, A special-shaped pile produced by using the concrete precast pile mold according to any one of claims 1-9.

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