CN219968329U - Variable-section pile die and variable-section pile die set - Google Patents

Abstract

The utility model provides a variable-section pile die and a variable-section pile die set, wherein the variable-section pile die comprises a strip-shaped outer die with an open die cavity, a plurality of inner shaping dies are arranged in the open die cavity at intervals along the longitudinal direction, the longitudinal central axis of each inner shaping die is approximately collinear with the longitudinal central axis of the outer die, and each inner shaping die comprises an open shaping bottom die and a shaping top die movably or detachably arranged at the top of the shaping bottom die; the transition mould section is at least partially a flexible mould, and the transition section of the variable-section pile is not easy to adhere after being contacted with concrete slurry by arranging the flexible mould, so that the mould is convenient to demould, and the quality of the formed variable-section pile is improved.

Description

Variable-section pile die and variable-section pile die set

Technical Field

The utility model relates to the technical field of molds for producing variable-section piles, in particular to a variable-section pile mold and a variable-section pile mold set.

Background

The prefabricated parts are prefabricated and formed in factories, so that the working time of site construction is reduced, and therefore, the prefabricated parts are deeply paid attention to by construction practitioners. The precast pile is mainly used for foundation construction, and in order to improve the bearing capacity and the side friction force of the precast pile, the variable-section pile is formed along with the precast pile, and the variable-section pile is provided with a thick section and a thin section along the length direction, wherein the thick section is convex relative to the thin section, so that the specific surface area of the outer wall of the pile is improved, the friction force between the pile body and surrounding soil is increased, the bearing capacity and the pulling resistance of the pile are improved, and the precast pile is widely used in foundation engineering.

The production of the variable-section pile needs to have corresponding moulds, because the variable-section pile has a thick section and a thin section, the existing moulds are usually rigid moulds, the transition section between the thick section and the thin section of the variable-section pile is a section change position, the stress concentration is easy to occur, the transition section of the variable-section pile is easy to adhere during demoulding, therefore, the transition section after demolding is subjected to the conditions of material shortage, material shortage and breakage, so that the variable-section pile is locally damaged and does not have a connecting structure, the quality of the variable-section pile is greatly reduced, and the quality of the variable-section pile is improved by improving the existing mold, so that the problem to be solved is solved.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a variable-section pile die and a variable-section pile die set.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

the variable-section pile die comprises a strip-shaped outer die with an open die cavity, wherein a plurality of inner molding dies are longitudinally arranged in the open die cavity at intervals, the longitudinal central axis of each inner molding die is approximately collinear with the longitudinal central axis of the outer die, and each inner molding die comprises an open molding bottom die and a molding top die movably or detachably arranged at the top of the molding bottom die;

the molding bottom die and the molding top die are surrounded to form a thin cavity die section and a transition die section, and at least part of the transition die section is a flexible die.

Preferably, the molding bottom die comprises a thin cavity bottom die and a transition bottom die, one end of the transition bottom die is detachably connected with the thin cavity bottom die, the other end of the transition bottom die is abutted against the cavity wall of the open cavity, and the molding top die comprises a thin cavity top die and a transition top die detachably connected with the thin cavity top die.

Preferably, the fine cavity bottom die comprises two fine cavity half dies which are symmetrically distributed along a longitudinal axis and are detachably connected;

the transition bottom die is of an integrated structure with the same cross section shape as the thin cavity bottom die, and is connected with the two thin cavity half dies; or, the transition bottom die comprises two transition half dies which are symmetrically distributed along the longitudinal axis and are respectively connected with the two thin cavity half dies, and the end parts of the two transition half dies are detachably connected or abutted.

Preferably, the fine cavity bottom die comprises two fine cavity split dies symmetrically distributed along a longitudinal axis and fine cavity connecting dies with two sides detachably connected with the two fine cavity split dies respectively;

the transition bottom die is of an integrated structure with the same cross section shape as the thin cavity bottom die, and is connected with two thin cavity split dies and a thin cavity connecting die; or the transition bottom die comprises two transition split dies which are symmetrically distributed along the longitudinal axis and are respectively connected with the two fine cavity split dies, and transition connection dies which are connected with the fine cavity connection dies and are respectively detachably connected or abutted against the two transition split dies at the two transverse sides.

Preferably, the two longitudinal ends of the thin cavity bottom die are provided with turnover edges, the turnover edges are turned towards the position far away from the thin cavity die sections, and the transition bottom die is mounted on the turnover edges.

Preferably, the outer die is provided with a plurality of first connecting slots at intervals along the longitudinal direction, the upper end part of the thin cavity bottom die is provided with a second connecting slot, a first connecting bolt passes through the second connecting slot and is in threaded connection with the first connecting slot, and the end part of the first connecting bolt is flush with or concave in the molding surface of the thin cavity bottom die;

or the thin cavity bottom die is clamped with the outer die;

or the thin cavity bottom die is connected with the outer die through magnetic attraction.

Preferably, a third connecting slot is formed in the upper end portion of the thin cavity top die, and a first connecting bolt penetrates through the second connecting slot and the third connecting slot to be connected with the first connecting slot in a threaded mode;

or, the upper end part of the thin cavity bottom die is provided with a plurality of connecting slotted holes IV, the upper end part of the thin cavity top die is provided with a plurality of connecting slotted holes V, and a second connecting bolt passes through the connecting slotted holes V and is in threaded connection with the connecting slotted holes IV;

and/or the outer die and/or the thin cavity bottom die are/is provided with connecting plates with through holes, and the connecting rods penetrate through the through holes of the connecting plates at two lateral sides to limit and butt the thin cavity top die on the thin cavity bottom die.

Preferably, the fine cavity top die is provided with a positioning piece;

the thin cavity bottom die is provided with a positioning groove matched with the positioning piece, or the positioning piece is placed in the second connecting slotted hole or the fifth connecting slotted hole.

Preferably, the outer walls of the outer mold and the inner molding mold are respectively provided with a connecting reinforcing rib;

and/or at least one groove or protrusion is longitudinally arranged on the modeling wall of the thin cavity mold section; the grooves or the protrusions are integrated or intermittent.

From the technical scheme, the beneficial effects of the utility model are as follows: the utility model provides a variable-section pile die, which comprises a strip-shaped outer die with an open die cavity, wherein a plurality of inner molding dies are longitudinally arranged in the open die cavity at intervals, the longitudinal central axis of each inner molding die is approximately collinear with the longitudinal central axis of the outer die, and each inner molding die comprises an open molding bottom die and a molding top die movably or detachably arranged at the top of the molding bottom die; the thin cavity mold section is used for forming a thin section of the variable-section pile, the transition mold section is used for forming a transition section of the variable-section pile, an inner forming mold is not arranged in the outer mold, a thick section of the variable-section pile is formed at the position of the inner forming mold, at least part of the transition mold section is a flexible mold, adhesion is not easy to occur after the transition section contacts with concrete slurry through the flexible mold, demolding is facilitated, the situation of material shortage and breakage is not easy to occur in the transition section of the variable-section pile after forming is facilitated, and accordingly quality of the variable-section pile after forming is improved.

In addition, the utility model also provides a variable-section pile die set, which comprises two longitudinal rigid retaining walls which are arranged side by side at intervals, two transverse tensioning retaining walls which are arranged side by side at intervals, a steam pipe and a plurality of variable-section pile dies, wherein the variable-section pile dies are sequentially arranged along the transverse direction, a gap is reserved between two adjacent variable-section pile dies, and at least part of side templates of outer dies of the two adjacent variable-section pile dies are connected; or two adjacent variable-section pile molds share a side template;

the longitudinal rigid retaining wall and the transverse tensioning retaining wall are sequentially connected end to end and enclose to form a steam curing section, and a plurality of variable-section pile dies are arranged in the steam curing section.

The variable-section pile die set provided by the utility model comprises the variable-section pile die, so that the variable-section pile die set has the same technical effects as the variable-section pile die.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a variable cross-section pile mold according to a first embodiment of the present utility model;

fig. 2 is an enlarged view of a portion a of fig. 1;

FIG. 3 is a schematic view of another view angle structure of a variable cross-section pile mold according to an embodiment of the present utility model;

FIG. 4 is a schematic view showing the structure of an inner molding die in the embodiment of the present utility model;

FIG. 5 is a schematic view of the structure of a fine cavity bottom die in an embodiment of the utility model;

FIG. 6 is a schematic view of a bottom mold according to an embodiment of the present utility model;

FIG. 7 is a schematic view of another bottom mold according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a bottom mold according to another embodiment of the present utility model;

FIG. 9 is a schematic view of a bottom mold according to still another embodiment of the present utility model;

FIG. 10 is a schematic view showing the structure of a molding top mold according to an embodiment of the present utility model;

FIG. 11 is a schematic perspective view of a variable cross-section pile die set according to an embodiment of the present utility model;

FIG. 12 is an elevation view of a variable cross-section pile die set in accordance with an embodiment of the present utility model;

FIG. 13 is a schematic perspective view of another variable cross-section pile die set according to an embodiment of the utility model;

fig. 14 is a schematic structural view of a variable cross-section pile.

Reference numerals:

100. variable section piles; 100a thick section; 100b, a thin section; 100c, a transition section;

10. an outer mold; 11. an open cavity; 12. a first connecting slot;

20. an inner shaping mold; 21. a fine cavity mold section; 22. a transition mold section; 23. connecting the reinforcing ribs;

30. molding a bottom die; 31. a fine cavity bottom die; 311. a fine cavity half mould; 312. a fine cavity connecting mold; 313. turning over the edge; 314. a second connecting slot; 315. a positioning groove; 316. fine cavity parting;

32. a transition bottom die; 321. a transition half mould; 322. a transition connection mould; 323. transition parting;

40. modeling a top mold; 41. a fine cavity top die; 411. a third connecting slot; 42. a transitional top mold; 43. a positioning piece;

50. a variable cross-section pile die set; 51. a top closure plate; 52. a longitudinal rigid retaining wall; 53. and transversely stretching the retaining wall.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments.

In the present specification, the terms "upper, lower, inner, outer" and the like are established based on the positional relationship shown in the drawings, and the corresponding positional relationship may be changed according to the drawings, so that the terms are not to be construed as absolute limitation of the protection scope; moreover, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

Here, the longitudinal direction of the variable cross-section pile mold is taken as the longitudinal direction, and the width direction of the mold is taken as the transverse direction.

Embodiment 1,

Referring to fig. 1-10, the present embodiment provides a pile mold, including an elongated outer mold 10 having an open cavity 11, a plurality of inner molding dies 20 are disposed in the open cavity 11 at intervals along a longitudinal direction, a longitudinal central axis of the inner molding dies 20 is substantially collinear with a longitudinal central axis of the outer mold 10, the inner molding dies 20 include a molding bottom die 30 having an opening and a molding top die 40 movably or detachably connected above the molding bottom die 30, the molding bottom die 30 and the molding top die 40 surround to form a thin cavity die section 21 and a transition die section 22, the thin cavity die section 21 and the transition die section 22 are in a circumferentially closed structure, the open cavity 11, the thin cavity die section 21 and the transition die section 22 are communicated, in particular, the thin cavity die section 21 is used for forming a thin section 100b of the pile 100, the transition die section 22 is used for forming a transition section 100c of the pile 100, a thick section 100a of the pile 100 is formed at a position where the inner molding die 20 is not disposed in the outer mold 10, and the number of the inner molding dies 20 can be determined according to the required pile length and the required pile length. By arranging the modeling top mold 40, the outer peripheral wall of the variable cross-section pile 100 is provided with a continuous thin cross-section 100b, compared with a discontinuous thick cross-section 100a, the outer peripheral wall of the variable cross-section pile 100 is provided with a continuous thin cross-section 100b, the structural strength, symmetry and aesthetic degree of the variable cross-section pile are greatly improved, the tensile pulling performance of the variable cross-section pile can be improved, the modeling top mold 40 can be movably connected with the modeling bottom mold 30 in a hinged mode, or can be detachably arranged on the modeling bottom mold 30 in a threaded connection, a clamping connection and the like, and after the variable cross-section pile 100 is molded, the modeling top mold 40 is turned over or detached, so that the demolding of the variable cross-section pile 100 is realized.

Specifically, a molding top mold 40 is disposed above the molding bottom mold 30, and the molding inner wall surface of the molding top mold 40 is lower than the height of the outer mold 10, and the adjacent molding top molds 40 are distributed and form a thick section 100a after trowelling, so that the distribution is facilitated, and the empty material is not easy to occur.

Wherein, transition section 22 is the flexible mould at least partially, because the changeover portion 100c of changeover portion 22 fashioned variable cross section stake 100 is cross-section change department, easily takes place stress concentration when the drawing of patterns, difficult drawing of patterns, and when adopting the flexible mould, flexible mould is difficult for taking place the adhesion after contacting with concrete slurry, the condition that stress concentration was reduced in certain limit self-adaptation deformation when drawing of patterns atress, the drawing of patterns of being convenient for the changeover portion 100c of fashioned variable cross section stake 100 is difficult for appearing the condition of unfilled stock, damage, thereby improves the quality of the fashioned variable cross section stake 100. Preferably, the flexible mold is made of a high-temperature-resistant flexible material, such as thermosetting rubber, and has the characteristics of high temperature resistance and small deformation range, so that excessive deformation caused by temperature rise in the subsequent steam curing process is avoided, and the quality of the formed variable-section pile 100 is influenced.

It should be noted that, as shown in fig. 1, the transition mold sections 22 may be disposed on both sides of the thin cavity mold section 21, respectively, for forming the thin section 100b of the middle part of the variable section pile 100, or, as shown in fig. 14, the transition mold section 22 may be disposed on one side of the thin cavity mold section 21, for forming the variable section pile 100 with the thin section 100b end.

Further, referring to fig. 1-4 and 10, the molding die 30 includes a fine cavity die 31 and a transition die 32, one end of the transition die 32 is detachably connected to the fine cavity die 31, the other end abuts against the cavity wall of the open cavity 11, and the molding die 30 and the outer die 10 are smoothly transited through the transition die 32. The molding top mold 40 comprises a thin cavity top mold 41 and a transition top mold 42 detachably connected to the thin cavity top mold 41, and since the transition mold section 22 is at least partially a flexible mold with a certain deformation capability, the transition bottom mold 32 is fully pressed against the cavity wall of the open cavity 11 after the inner molding mold 20 is installed in the open cavity 11, so that no slurry leakage phenomenon can occur between the transition bottom mold 32 and the outer mold 10 after concrete distribution, and compared with the rigid mold, the mold needs to be welded on the cavity wall of the open cavity 11, and the production and installation time of the mold is greatly reduced. In addition, the transition bottom die 32 and the transition top die 42 are respectively detachably connected with the thin cavity bottom die 31 and the thin cavity top die 41, so that the replacement is convenient, and the universality of the equipment is improved.

In addition, since the molding top mold 40 is movably or detachably installed above the molding bottom mold 30, it is relatively easy to demold, and it is preferable that only the transition bottom mold 32 be provided as a flexible mold, thereby reducing costs.

Further, referring to fig. 6, the thin cavity bottom die 31 includes two thin cavity half dies 311 symmetrically distributed along a longitudinal axis and detachably connected, the transition bottom die 32 has an integral structure with the same cross-sectional shape as the thin cavity bottom die 31, the transition bottom die 32 connects the two thin cavity half dies 311, because the two thin cavity half dies 311 have the same structure, the thin cavity bottom die 31 is set to be in a split structure to form a modularized structure, so that the thin cavity bottom die 31 is convenient to produce, transport and stack in a workshop, in the actual use process, the two thin cavity half dies 311 can be spliced into an integral structure in advance through the modes of screwing, magnetic attraction, clamping and the like, namely the thin cavity half dies 31, then the thin cavity half dies are connected with the transition bottom die 32, and then are put into a preset position in the open cavity 11, or the two thin cavity half dies 311 can be sequentially and respectively installed at a preset position in the open cavity 11, and the two thin cavity half dies 311 are in sealing and abutting connection. In addition, referring to fig. 7, the transition bottom die 32 may also be configured to include two transition half dies 321 symmetrically distributed along the longitudinal axis and respectively connected to two fine cavity half dies 311, where the ends of the two transition half dies 321 are detachably connected or abutted, so as to facilitate production, transportation and stacking in a workshop, where a single transition half die 321 may be connected with the fine cavity half dies 311 in advance, or the two transition half dies 321 may be spliced into an integral structure and then mounted on the two fine cavity half dies 311 that are assembled integrally, or the two transition half dies 321 may be mounted on a connecting plate with the same cross-sectional shape as the fine cavity bottom die 31, so that the shape of the connecting plate is fixed, and then the integral structure is used to realize the butt joint of the two fine cavity half dies 311 to form the integral structure, i.e. the inner molding die 20.

Further, as shown in fig. 5, the two longitudinal ends of the thin cavity bottom die 31 are provided with turnover edges 313, the turnover edges 313 are turned towards the thin cavity die section, the transition bottom die 32 is mounted on the turnover edges 313, the turnover edges 313 are provided for the transition bottom die 32, the turnover edges 313 can also provide support for the thin cavity bottom die 31, and the thin cavity half dies 311 in the middle of the two turnover edges 313 can be suspended, so that the use of die materials is reduced, and the cost is reduced.

Further, as shown in fig. 2, the outer mold 10 is provided with a plurality of first connecting slots 12 at intervals along the longitudinal direction, the upper end of the thin cavity bottom mold 31 is provided with a second connecting slot 314, a first connecting bolt passes through the second connecting slot 314 and is screwed to the first connecting slot 12, the end of the first connecting bolt is flush with or concave to the molding surface of the thin cavity bottom mold 31, and the connection and fixation of the outer mold 10 to the molding bottom mold 30 are realized through the first connecting bolt; in addition, the thin cavity bottom die 31 can be connected to the outer die 10 in a clamping manner, or the thin cavity bottom die 31 can be connected to the outer die 10 in a magnetic attraction manner.

Further, as shown in fig. 2, the upper end portion of the thin cavity top mold 41 is provided with a third connecting slot 411, and a first connecting bolt passes through the second connecting slot 314 and the third connecting slot 411 and is in threaded connection with the first connecting slot 12, that is, the first connecting bolt is simultaneously connected with the outer mold 10, the molding bottom mold 30 and the molding top mold 40, so as to realize connection and fixation of the three; alternatively, a plurality of fourth connecting slots may be formed in the upper end portion of the fine cavity bottom die 31, a fifth connecting slot may be formed in the upper end portion of the fine cavity top die 41, and a second connecting bolt passes through the fifth connecting slot and is screwed to the fourth connecting slot, that is, the fine cavity bottom die 31 and the fine cavity top die 41 are separately connected through the second connecting bolt.

Further, the outer mold 10 and/or the fine cavity bottom mold 31 are provided with connecting plates with through holes, and the connecting rods penetrate through the through holes of the connecting plates at two lateral sides to limit and abut the fine cavity top mold 41 on the fine cavity bottom mold 31, so that the fine cavity top mold 41 is prevented from being shifted in the subsequent concrete slurry vibration process.

Further, as shown in fig. 10, the thin cavity top mold 41 is provided with a positioning piece 43, the thin cavity bottom mold 31 is provided with a positioning groove 315 adapted to the positioning piece 43, the positioning piece 43 can be clamped on a side plate of the thin cavity bottom mold 31, positioning of the thin cavity bottom mold 31 and the thin cavity top mold 41 can be primarily achieved through cooperation of the positioning piece 43 and the positioning groove 315, or the positioning piece 43 can be directly placed in the second connecting slot 314 or the fifth connecting slot without additionally providing a slot.

Further, as shown in fig. 4, the outer walls of the outer mold 10 and the inner molding mold 20 are provided with connection reinforcing ribs 23 along the longitudinal direction, and the connection reinforcing ribs 23 are provided to support the outer mold 10 and the inner molding mold 20, so that the strength of the outer mold 10 and the inner molding mold 20 is increased, the outer mold 10 and the inner molding mold 20 are prevented from being deformed under stress after being distributed, and the quality of the molded variable-section pile 100 is further affected.

In addition, at least one groove or protrusion may be further disposed on the cavity wall of the fine cavity mold section 21 along the longitudinal direction, that is, grooves or protrusions may be disposed on the molding cavity walls of the fine cavity bottom mold 31 and the fine cavity top mold 41, where the grooves or protrusions may be integrated or intermittent (not shown in the drawing), so that ribs or grooves are correspondingly formed on the formed variable cross section pile 100, after pile sinking construction, the variable cross section pile 100 and the surrounding soil body encircle to form an integral structure, the ribs or grooves increase the contact area between the variable cross section pile 100 and the surrounding soil body, so that the surrounding soil body is more tightly attached to the outer wall surface of the variable cross section pile 100, and friction force between the pile body and the surrounding soil body is improved, thereby greatly enhancing the anti-pulling bearing performance of the variable cross section pile 100.

Example two

In this embodiment, the same reference numerals are given to the same parts as those of the first embodiment, and the same description is omitted.

As shown in fig. 8, with respect to the first embodiment, the variable cross-section pile mold provided in this embodiment has such a different structural design:

the fine cavity bottom die 31 comprises two fine cavity split dies 316 symmetrically distributed along the longitudinal axis and fine cavity connecting dies 312 with two sides detachably connected with the two fine cavity split dies 316 respectively; the transition bottom die 32 is of an integral structure with the same cross-sectional shape as the thin cavity bottom die 31, and the transition bottom die 32 is connected with two thin cavity split dies 316 and a thin cavity connecting die 312; specifically, the section of the fine cavity linking mold 312 is in a 'convex' shape, two ends of the fine cavity linking mold are connected to the bottoms of the two fine cavity split molds 316, the upper surface of the middle part of the fine cavity linking mold is flush with the upper surface of the bottom plate of the fine cavity split mold 316, the fine cavity linking mold 312 is arranged to connect the two fine cavity split molds 316, gaps are avoided between the two fine cavity split molds 316, slurry leakage is prevented from occurring, the forming quality of the variable cross-section pile 100 is affected, the transverse width of the fine cavity bottom mold 31 can be changed by changing the transverse width of the fine cavity linking mold 312, the size of a mold cavity is changed, the applicability of the variable cross-section pile 100 with different sizes is improved, during installation, the fine cavity bottom mold 31 is formed by connecting the two fine cavity split molds 316 through the fine cavity linking mold 312, and then the transition bottom mold 32 is installed on one side or two sides of the fine cavity bottom mold 31 to form the inner molding mold 20.

Or, referring to fig. 9, the transition bottom die 32 includes two transition split dies 323 symmetrically distributed along the longitudinal axis and respectively connected to the two fine cavity split dies 316, a transition joining die 322 connected to the fine cavity joining die 312 and having two lateral sides detachably connected or abutted to the two transition split dies 323 respectively, the cross section of the transition joining die 322 is in a convex shape, the connection mode is the same as that of the fine cavity joining die 312, the effect is the same, and the details are not repeated here, and by setting the transition split dies 323 and the transition joining die 322, the concrete slurry can be conveniently stacked in the production, transportation and workshop on the one hand, and the concrete slurry can be prevented from leaking from the connection position of the two transition split dies 323 on the other hand.

Example III

In this embodiment, the same reference numerals are given to the same parts as those of the first and second embodiments, and the same description is omitted.

As shown in fig. 11 to 13, compared with the first embodiment, the present embodiment provides a variable cross-section pile mold set 50, which includes a plurality of variable cross-section pile molds of the above embodiments, and the plurality of variable cross-section pile molds are sequentially arranged in the lateral direction, so that the variable cross-section pile mold set 50 can simultaneously produce a plurality of variable cross-section piles 100, and the production efficiency is improved. A gap is formed between two adjacent variable-section pile dies, and at least part of side templates of the outer dies 10 of the two adjacent variable-section pile dies are connected, specifically, a top sealing plate 51 can be arranged between the two adjacent variable-section pile dies, on one hand, the top sealing plate 51 can play a role of connecting the two adjacent variable-section pile dies, and the connection strength is improved; on the other hand, the top sealing plate 51 completely seals the gap, so that when the concrete is distributed above the variable cross-section pile die set 50, the concrete can be prevented from falling into the gap between two adjacent variable cross-section pile dies, and the variable cross-section pile dies are lack of materials and difficult to clean, so that the product quality and the production environment are affected.

Or, two adjacent variable-section pile molds share the side template, so that the material consumption for manufacturing the variable-section pile molds is saved, and the material cost of the molds is reduced.

Further, as shown in fig. 13, the variable-section pile die set 50 further includes two longitudinal rigid retaining walls 52 arranged side by side and at intervals, two transverse tensioning retaining walls 53 arranged side by side and at intervals, a steam pipe, and more than two supporting frames for carrying the variable-section pile die, the longitudinal rigid retaining walls 52 and the transverse tensioning retaining walls 53 are sequentially connected end to end and enclose to form a steam curing section, the variable-section pile die set 50 is arranged in the steam curing section, and when steam is introduced to the steam curing section, the steam curing section is covered by a canopy cover or tarpaulin, so that a sealed area is formed in the steam curing section, and the steam curing efficiency is improved. In addition, the transverse tensioning retaining wall 53 is a stressed wall bearing tensioning force, the transverse tensioning retaining wall 53 is provided with a through hole for a tensioning pull rod to pass through, the tensioning machine is arranged outside the transverse tensioning retaining wall 53 and connected with the tensioning pull rod to tension a steel reinforcement cage, and can stretch the steel reinforcement cage, distribute concrete and steam the steel reinforcement cage in a steam curing zone, so that reciprocating lifting dies in a stretching zone, a distributing zone and a steam curing zone are not needed in the traditional variable-section pile manufacturing process, namely lifting steps in the variable-section pile manufacturing process are reduced, and the production efficiency of the variable-section pile is improved.

The foregoing is merely a preferred embodiment of the present utility model, and the scope of the utility model is defined by the claims, and those skilled in the art should also consider the scope of the present utility model without departing from the spirit and scope of the utility model.

Claims (10)

1. The variable-section pile die comprises a strip-shaped outer die with an open die cavity, wherein a plurality of inner molding dies are longitudinally arranged in the open die cavity at intervals, and the variable-section pile die is characterized in that the longitudinal central axis of the inner molding dies is approximately collinear with the longitudinal central axis of the outer die, and the inner molding dies comprise an open molding bottom die and a molding top die movably or detachably arranged at the top of the molding bottom die;

the molding bottom die and the molding top die are surrounded to form a thin cavity die section and a transition die section, and at least part of the transition die section is a flexible die.

2. The variable cross-section pile mold of claim 1, wherein the modeling die comprises a fine cavity die and a transition die, one end of the transition die is detachably connected to the fine cavity die, the other end of the transition die abuts against a cavity wall of the open cavity, and the modeling top mold comprises a fine cavity top mold and a transition top mold detachably connected to the fine cavity top mold.

3. The variable cross-section pile mold of claim 2, wherein the fine cavity bottom mold comprises two fine cavity mold halves symmetrically distributed along a longitudinal axis and detachably connected;

the transition bottom die is of an integrated structure with the same cross section shape as the thin cavity bottom die, and is connected with the two thin cavity half dies; or, the transition bottom die comprises two transition half dies which are symmetrically distributed along the longitudinal axis and are respectively connected with the two thin cavity half dies, and the end parts of the two transition half dies are detachably connected or abutted.

4. The variable cross-section pile die of claim 2, wherein the fine cavity bottom die comprises two fine cavity split dies symmetrically distributed along a longitudinal axis and fine cavity connecting dies with two sides detachably connected with the two fine cavity split dies respectively;

the transition bottom die is of an integrated structure with the same cross section shape as the thin cavity bottom die, and is connected with two thin cavity split dies and a thin cavity connecting die; or the transition bottom die comprises two transition split dies which are symmetrically distributed along the longitudinal axis and are respectively connected with the two fine cavity split dies, and transition connection dies which are connected with the fine cavity connection dies and are respectively detachably connected or abutted against the two transition split dies at the two transverse sides.

5. The variable cross-section pile mold according to any one of claims 2-4, wherein the thin cavity bottom mold is provided with turnover edges at both longitudinal ends, the turnover edges being turned away from the thin cavity mold section, and the transition bottom mold is mounted on the turnover edges.

6. The variable cross-section pile die of claim 5, wherein the outer die is provided with a plurality of first connecting slots at intervals along the longitudinal direction, the upper end part of the thin cavity bottom die is provided with a second connecting slot, a first connecting bolt passes through the second connecting slot and is in threaded connection with the first connecting slot, and the end part of the first connecting bolt is flush with or concave in the molding surface of the thin cavity bottom die;

or the thin cavity bottom die is clamped with the outer die;

or the thin cavity bottom die is connected with the outer die through magnetic attraction.

7. The variable cross-section pile die of claim 6, wherein a third connecting slot is formed in the upper end of the fine cavity top die, and a first connecting bolt passes through the second connecting slot and the third connecting slot and is in threaded connection with the first connecting slot;

or, the upper end part of the thin cavity bottom die is provided with a plurality of connecting slotted holes IV, the upper end part of the thin cavity top die is provided with a plurality of connecting slotted holes V, and a second connecting bolt passes through the connecting slotted holes V and is in threaded connection with the connecting slotted holes IV;

and/or the outer die and/or the thin cavity bottom die are/is provided with connecting plates with through holes, and the connecting rods penetrate through the through holes of the connecting plates at two lateral sides to limit and butt the thin cavity top die on the thin cavity bottom die.

8. The variable cross-section pile mold of claim 7, wherein the fine cavity top mold has a positioning member;

the thin cavity bottom die is provided with a positioning groove matched with the positioning piece, or the positioning piece is placed in the second connecting slotted hole or the fifth connecting slotted hole.

9. The variable cross-section pile mold according to claim 1, wherein the outer mold and the outer wall of the inner molding mold are each provided with a connection reinforcing rib;

and/or at least one groove or protrusion is longitudinally arranged on the modeling cavity wall of the thin cavity mold section; the grooves or the protrusions are integrated or intermittent.

10. A variable-section pile die set, which is characterized by comprising two longitudinal rigid retaining walls which are arranged side by side and at intervals, two transverse tensioning retaining walls which are arranged side by side and at intervals, a steam pipe and a plurality of variable-section pile dies according to any one of claims 1 to 8, wherein a plurality of variable-section pile dies are arranged in sequence along the transverse direction, a gap is reserved between two adjacent variable-section pile dies, and side templates of outer dies of the two adjacent variable-section pile dies are at least partially connected; or two adjacent variable-section pile molds share a side template;

the longitudinal rigid retaining wall and the transverse tensioning retaining wall are sequentially connected end to end and enclose to form a steam curing section, and a plurality of variable-section pile dies are arranged in the steam curing section.