CN211762439U - Variable cross section square pile forming die - Google Patents

Abstract

The utility model discloses a variable cross section square pile forming die, including looks articulated solid fixed die plate and the template that verts, solid fixed die plate and the shaping face of the template that verts are provided with an at least recess along length direction interval separately, and the shaping die cavity that the template that verts and solid fixed die plate compound die formed constitutes a thick chamber section respectively at the groove position, and forms a thin chamber section between two adjacent thick chamber sections, and thick chamber section and thin chamber section are used for thick stake section and the thin stake section of shaping variable cross section square pile respectively. The utility model relates to a heterotypic stake mould has realized the swift molding of the solid square pile of variable cross section, cooperates cover half and movable mould articulated connected mode simultaneously, realizes the quick drawing of patterns of the solid square pile of variable cross section, still makes things convenient for the installation of steel reinforcement cage.

Description

Variable cross section square pile forming die

Technical Field

The utility model relates to a technical field of stake production mould especially relates to a variable cross section square pile forming die.

Background

The precast pile is prefabricated in a prefabricated component factory or a construction site, and is sunk into the soil at a designed position by pile sinking equipment. The prefabricated reinforced concrete pile is one widely used type in China.

The reinforced concrete precast pile has a square solid section pile and a cylindrical hollow section pile. The square solid section pile has a square section, the section of the square solid section pile is constant along the length of the pile, the square solid section pile is convenient to process, and the manufacturing quality is easy to guarantee. Traditional square pile mould adopts fixed structural style, and when the drawing of patterns, the inside extrusion force that produces along with concrete square pile's lifting between the side form board of symmetry is difficult for the drawing of patterns, and causes inside damage and surperficial irregular crackle easily to the product. To the above problem, prior art discloses a precast concrete pile mould, including side form one, side form two and die block, the die block forms the die cavity with side form one, the side form two is articulated, and it passes through die block and the mode that the pin is articulated for the side form, realizes opening certain angle between die block and the side form, makes things convenient for the drawing of patterns, also is convenient for adjust.

However, with the development of the building industry, the bearing capacity and the pulling resistance of the square pile are required to be higher, so that the prestressed variable-section solid square pile is also developed. The variable cross-section solid square pile can effectively increase the contact surface due to the concave-convex pile body, improves the bearing capacity and the pulling resistance of the square pile, and provides new tests for the modeling structure of a processing mould, the convenient degree of demoulding and the processing technology. Foretell a concrete precast pile mould can't satisfy the production demand of variable cross section square pile again, and fixed variable cross section square pile forming die adopts the powerful drawing of patterns easily to cause glutinous material and the impaired problem of mould. Therefore, the variable cross-section square pile forming die is provided to meet the requirement for convenient production of the variable cross-section square pile.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the current variable cross section square pile mould molding and the drawing of patterns degree of difficulty are big.

For realizing the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides a variable cross section square pile forming die, includes looks articulated solid fixed die plate and the template of verting, the solid fixed die plate is provided with an at least recess with the shaping face of the template of verting along length direction interval separately, the shaping die cavity that the template of verting and solid fixed die plate compound die formed is in groove position constitutes a thick chamber section respectively, and forms a thin chamber section between two adjacent thick chamber sections, thick chamber section and thin chamber section are used for the thick stake section and the thin stake section of shaping variable cross section square pile respectively.

Preferably, the tilting template comprises a movable side die hinged on one side or two sides of the fixed template through a hinge structure; the forming surface at the inner side of the movable side die is provided with the grooves at intervals along the length direction of the movable side die, and the grooves correspond to the positions of the grooves on the fixed die plate.

Preferably, the fixed die plate is bent upwards on a die assembly side of the movable side die, and the fixed die plate forms a large fillet or a large chamfer transition at the bent part of the groove.

Preferably, the fixed die plate and/or the movable side die is provided with a sealing structure on a die clamping contact surface.

Preferably, the fixed template and the movable side mold both comprise a long-strip-shaped outer mold and a modeling lining plate arranged on the inner side of the outer mold, and the modeling lining plate is provided with the grooves at intervals along the length direction of the outer mold;

and longitudinal and/or vertical reinforcing rib plates are arranged on the outer side of the outer die.

Preferably, the tilting die plate further comprises turning molding dies with the same number as the grooves in the fixed die plate, and the turning molding dies are provided with the grooves facing the molding die cavity;

one side of the turnover modeling mold is movably connected with the top of one of the fixed template and the movable side mold through a hinge structure, and the other side of the turnover modeling mold is in locking connection with the top of the other of the movable side mold and the fixed template during mold closing; or one side of the turnover modeling die is movably connected with the top of the movable side die through a hinge structure, and the other side of the turnover modeling die is in locking connection with the top of the movable side die on the opposite side when the die is closed.

Preferably, the top of the turning molding die is provided with a frame opening communicated with the inner side groove;

a connecting structure is connected between the adjacent turning modeling moulds; the connecting structure is one or a combination of a plurality of connecting plates, connecting frames and connecting strips.

Preferably, the grooves on the fixed template and the tilting template are connected through a transition surface at the joint of the coarse cavity section and the fine cavity section, and the transition surface is one or the combination of two of an inclined plane and an inclined conical surface.

Preferably, the device further comprises a fixing assembly and/or a tensioning assembly arranged at the end part of the open type variable cross-section square pile forming mould consisting of the fixed template and the movable side mould.

Preferably, the top of the open type variable cross-section square pile forming die at one end provided with the tensioning assembly is provided with a tensioning deviation-preventing die cover;

one side of the tension anti-deviation mold cover is connected with one of the fixed template and the movable side mold in a movable hinge mode, and the other side of the tension anti-deviation mold cover is connected with the other of the movable side mold and the fixed template in a bolt pressing mode during mold closing; or one side of the tension anti-deviation mold cover is connected with the movable side mold in a movable hinge mode, and the other side of the tension anti-deviation mold cover is connected with the opposite movable side mold in a bolt pressing mode during mold closing.

The utility model provides a pair of variable cross section square pile forming die, through set up corresponding recess on the interior profile of making of each template, can form thick chamber section in the groove position department during the compound die, realize the swift molding of variable cross section square pile, cooperate the fixed die plate and the articulated connected mode of template that verts simultaneously, realize the quick drawing of patterns of variable cross section square pile, prevent that variable cross section square pile thick pile section stress concentration from leading to the problem of glutinous material and difficult drawing of patterns, help improving yield, the finished product integrality of variable cross section square pile, still avoided the powerful drawing of patterns to lead to the impaired problem of mould, help prolonging the life of mould, adopt the mode that at least one side mould can vert and overturn simultaneously, make things convenient for the installation of steel reinforcement cage; in addition, the stability of movement of the tensioning plate in the tensioning process is improved by arranging the tensioning deviation-preventing mould cover, the tensioning quality is improved, and the bearing and the anti-pulling performance uniformity of the square pile with the variable cross section are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used 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 invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a perspective view of a variable cross-section square pile forming mold according to a first embodiment;

FIG. 2 is a schematic end view of a variable cross-section square pile forming mold according to an embodiment;

FIG. 3 is a schematic view showing the inner side surface structure of the movable side mold in the first embodiment;

FIG. 4 is a schematic structural view of a fixed die plate according to the first embodiment;

FIG. 5 is a schematic end view of a variable cross-section square pile forming mold according to a second embodiment;

FIG. 6 is a perspective view of a variable cross-section square pile forming die according to a fourth embodiment;

fig. 7 is a partially enlarged view of a portion a in fig. 6;

FIG. 8 is a perspective view of a variable cross-section square pile forming die connected by a connecting structure between the reverse modeling dies according to the fourth embodiment;

FIG. 9 is a perspective view of a forming die for a square pile with a variable cross section according to the fifth embodiment;

FIG. 10 is a schematic view of a partial structure of a tensioning end of a forming die for a square pile with a variable cross section in the fifth embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

< example one >

As shown in fig. 1 to 4, the variable cross-section square pile forming mold provided in this embodiment includes a fixed mold plate 1 and a tilt mold plate 2, which are hinged to each other, and in this embodiment, the length direction of a specific variable cross-section square pile forming mold is defined as a longitudinal direction, the width direction is a transverse direction, and the height direction is a vertical direction. Specifically, the shaping face of solid fixed die plate 1 and template 2 that verts is provided with an at least recess 10a along length direction interval on separately, the shaping die cavity that the template 2 and the solid fixed die plate 1 compound die that verts formed is in recess 10a position constitutes a thick chamber section 100 respectively, and forms a thin chamber section 400 between two adjacent thick chamber sections 100, thick chamber section 100 and thin chamber section 400 are used for the thick stake section and the thin stake section of shaping variable cross section square pile respectively.

In the embodiment, the corresponding grooves 10a are formed in the inner molded surfaces of the templates, the coarse cavity section 100 can be formed at the position of the groove 10a during die assembly, the rapid molding of the variable-section square pile is realized, and meanwhile, the connecting mode that the fixed template 1 is hinged to the tilting template 2 is matched, the rapid demolding of the variable-section square pile is realized, the problems of material adhesion and difficult demolding caused by stress concentration of the coarse pile section of the variable-section square pile are prevented, so that the yield and the integrity of the variable-section square pile are improved, the problem that the die is damaged due to strong demolding is avoided, the service life of the die is prolonged, and meanwhile, the mode that at least one side die can be tilted and turned over is adopted, so that the installation of a reinforcement cage is facilitated; in addition, the stability of movement of the tensioning plate in the tensioning process is improved by arranging the tensioning deviation-preventing mould cover 4, the tensioning quality is improved, and the bearing and the anti-pulling performance uniformity of the square pile with the variable cross section are improved.

In this embodiment, the tilting template 2 includes the movable side die 21 hinged on one side of the fixed template 1 through the hinge structure 6, at this time, the fixed template 1 includes the bottom die and the fixed side die vertically connected therewith, both are an integral structure, the longitudinal section is "L" style of calligraphy structure, the longitudinal section of the movable side die 21 is "I" style of calligraphy structure, correspondingly, the longitudinal section of the grooves 10a arranged at intervals on the fixed template 1 is "L" style of calligraphy structure, the longitudinal section of the grooves 10a arranged at intervals on the movable side die 21 is "I" style of calligraphy structure, the movable side die 21 and the fixed template 1 form the open type variable cross-section square pile forming die with the longitudinal section being "ㄩ" style of calligraphy after being assembled. In the present embodiment, the longitudinal sectional shape of the groove 10a varies depending on the longitudinal sectional shape of the movable side die 21 or the fixed die plate 1 to which it belongs, but the sectional shapes of the groove 10a on the movable side die 21 and the fixed die plate 1 are the same.

Further, the fixed template 1 and the movable side mold 21 both comprise an elongated external mold 200 and a molding lining plate 300 arranged inside the external mold 200, and the molding lining plate 300 is provided with the grooves 10a at intervals along the length direction of the external mold 200; the outer side of the outer die 200 is provided with a longitudinal and/or vertical reinforcing rib plate.

In this embodiment, the hinge structures 6 are formed by connecting the movable side mold 21 and the hinge ear plates staggered on the fixed mold plate 1 through a pin, and the pin on each group of hinge structures is coaxial, so that each group of hinge structures can share one pin for connection. Preferably, the hinge structure 6 is provided at a reinforcing rib plate outside the outer die 200 to improve the structural strength of the hinge, and prevent the problem of deformation of the movable side die 21 or the fixed die plate 1 during the turnover process.

In this embodiment, each of the molded liners 300 may be integrally molded, which enhances structural firmness and avoids welding, thereby facilitating demolding; the welding structure can be formed by welding all lining plate units, the stress at the position of the thick cavity section 100 is concentrated, so that a welding seam avoids the position of the thick cavity section 100 as much as possible, a maximum working stress area is avoided, the influence on the welding structure is reduced, meanwhile, the stress at the transition position of the thick cavity section 100 and the thin cavity section 400 is concentrated, the angle is smaller than 180 degrees, the welding is avoided as much as possible, and a grinding machine is conveniently adopted for grinding. After welding, high temperature resistant glue such as silicone glue, phenolic resin glue, urea-formaldehyde resin glue, high temperature resistant epoxy glue, polyimide glue and the like can be coated on the welding seam, pits at the welding seam are complemented by the high temperature resistant glue, and then polishing treatment is carried out.

Furthermore, the fixed template 1 forms a fillet or chamfer transition at the joint of the bottom die and the fixed side die, so that the demoulding of the special-shaped concrete member after the forming is convenient, and the problem that the demoulding is difficult due to the fact that the inner die is restored to deform after the concrete material is cooled and solidified and the concrete at the small angle is clamped under the action of resilience force is avoided. More preferably, the bottom die and the fixed side die are transited at the joint of the coarse cavity section 100 through a large fillet or a large chamfer, that is, the fillet and the chamfer at the bending part of the coarse cavity section 100 are increased, so that the problem of deformation is reduced, and the problem of difficult demoulding caused by clamping of concrete during demoulding is prevented.

In addition, the grooves 10a of the fixed die plate 1 and the tilting die plate 2 are connected at the joint of the coarse cavity section 100 and the fine cavity section 400 through a transition surface, which is one or a combination of an inclined plane and an inclined conical surface. The plane is connected with the plane through an inclined plane, and when the round angle at the bending part of the thick cavity section 100 is larger than the round angle at the bending part of the thin cavity section 400, the corresponding round angle is connected with the round angle through an inclined conical surface. The purpose through inclined plane and oblique conical surface transitional coupling is in order to reduce the right angle and prevent the acute angle, prevents that the concrete material from getting rid of after the cooling solidification pressure and leading to the problem that the die face angle diminishes and lead to the card material. In order to reduce or eliminate the thick pile section clamping thin cavity section 400 caused by stress release after prestress tension of the variable cross-section square pile, a large-down draft angle theta is formed between the movable side mold 21 and the inclined planes at the front end and the rear end of the groove 10a of the fixed side mold on the fixed template 1, namely, in the direction from the bottom of the molding cavity to the opening of the cavity, the longitudinal length dimension of the thick cavity section 100 is gradually increased from the middle part of the thick cavity section 100 to one side or two sides, and the longitudinal length dimension of the transition surface is kept equal in length or is gradually increased.

The variable cross section square pile forming die of this embodiment is when production, connects fixed side form and activity side form through the brace after the compound die, prevents the activity of in-process activity side form at production, and the arch at variable cross section square pile thick pile section top can obtain through following mode:

the first method is as follows: after filling concrete materials into a forming die cavity formed after die assembly, continuously distributing the concrete materials to the top of the thick cavity section 100 of the variable cross-section square pile forming die, and then performing modeling and molding through manual stacking and molding or by means of an external tool;

the second method comprises the following steps: after the forming die cavity formed after die assembly is filled with concrete materials, inserting the prefabricated convex block into the top of the coarse cavity section 100 to enable the convex block and the concrete materials to be fixedly integrated;

the third method comprises the following steps: the prefabricated convex block is placed at the bottom of a coarse cavity section 100 of a forming die cavity formed after die assembly, then concrete materials are filled into the forming die cavity, and finally the prefabricated convex block is inserted into the top of the coarse cavity section 100 to be fixedly connected with the concrete materials into a whole.

< example two >

In the present embodiment, the same portions as those in the first embodiment are given the same reference numerals, and the same description is omitted.

As shown in fig. 5, compared with the first embodiment, the present embodiment provides a variable cross-section square pile forming mold with such a different structural design:

template 2 verts includes and articulates the activity side mould 21 in fixed die plate 1 both sides through hinge structure, at this moment, fixed die plate 1 is horizontally die block, the longitudinal section is "one" style of calligraphy structure, activity side mould 21 longitudinal section is "I" style of calligraphy structure, it is corresponding, the recess 10a longitudinal section that the interval set up on the fixed die plate 1 is "one" style of calligraphy structure, spaced recess 10a longitudinal section is "I" style of calligraphy structure on the activity side mould 21, constitute behind activity side mould 21 and the fixed die plate 1 compound die that the longitudinal section is the uncovered formula variable cross section square pile forming die of "ㄩ" style of calligraphy.

Compared with the first embodiment, the side dies on both sides of the variable cross-section square pile forming die are the movable side dies 21, and during demolding, the movable side dies 21 on both sides can be overturned outwards to perform demolding, so that the problem of abrasion to the side dies in the demolding process is further reduced.

< example three >

In the present embodiment, the same portions as those in the first embodiment and the second embodiment are given the same reference numerals, and the same description is omitted.

Referring to fig. 4 and 5 again, compared to the first and second embodiments, the variable cross-section square pile forming mold provided in this embodiment further has the following different structural design:

the hinged side of the fixed template 1 connected with the movable side mould 21 is bent upwards, the two sides form an upwards-tilted anti-overflow edge 11, and the effect of material pocket is achieved in the process of pouring concrete at the beginning.

In order to further improve the sealing performance of the mold, sealing structures are arranged on the mold closing contact surfaces of the fixed mold plate 1 and/or the movable side mold 21, the sealing structures can be sealing strips, can also be structures which are tightly buckled with each other, or can be combined by multiple sealing structures, so that the mold closing joint achieves the effect of sealing and preventing overflow.

< example four >

In the present embodiment, the same portions as those in the first, second, and third embodiments are given the same reference numerals, and the same description is omitted.

As shown in fig. 6, the variable cross-section square pile forming die provided by this embodiment has such a different structural design compared to the first, second and third embodiments:

the tilting template 2 further comprises a turning modeling die 22 corresponding to the upper groove 10a of the fixed template 1 in equal quantity and position, one side of the turning modeling die 22 is movably connected with the top of one of the fixed template 1 and the movable side die 21 through a hinge structure, and the other side of the turning modeling die 22 is locked and connected with the top of the other of the movable side die 21 and the fixed template 1 during die assembly. When the fixed template 1 is of an L-shaped structure in the first embodiment, one side of the reversible modeling mold 22 is movably connected with the top of the fixed template 1 through a hinge structure, and the other side of the reversible modeling mold is connected with the top of the movable side mold 21 in a locking manner during mold closing; of course, it is also possible to flip the molding die 22 to have one side movably connected to the top of the movable side die 21 by a hinge structure and the other side locked to the top of the fixed die plate 1 during die assembly.

When the longitudinal section of the fixed template 1 is in a straight-line-shaped structure in the second embodiment, one side of the turnover modeling mold 22 is hinged with the top of any movable side mold 21, and the other side of the turnover modeling mold is in locking connection with the top of the other movable side mold 21 during mold closing; of course, both sides of the inverted mold 22 can be connected to the corresponding movable side mold 21 by locking (e.g., bolting), and at this time, the whole inverted mold 22 needs to be removed when the mold is opened.

Referring to fig. 7, in the embodiment, a screw 22b is disposed on the locking side of the inverted modeling mold 22, a locking nut 22c is sleeved on the screw 22b, a locking seat 5 with a U-shaped groove is disposed at the top of the locking side of the fixed mold plate 1 or the movable side mold 21 corresponding to the locking side of the inverted modeling mold 22, when the mold is closed and locked, the screw 22b is disposed in the U-shaped groove, and at this time, the locking nut 22c is located on the outer side of the locking seat 5, and the locking nut 22c is screwed in until abutting against the locking seat 5, and the movable side mold 21 does not shake. Furthermore, in order to enhance the firmness of the locking seat 5, at least one reinforcing rib 51 is provided on the inner side of the locking seat 5 for reinforcement. The locking connection mode can achieve the adjusting effect.

Further, the groove 10a is formed in the overturning modeling die 22 towards the molding die cavity, when the die is closed, the groove 10a in the overturning modeling die 22 is connected with the fixed die plate 1 at the same position and the groove 10a in the movable side die 21 end to form a complete coarse cavity section 100, preferably, a frame opening 22a communicated with the inner side groove 10a is formed in the top of the overturning modeling die 22, the visual effect is achieved, the problem that the inside of the overturning modeling die 22 cannot be seen to cause insufficient filling in the process of filling materials is avoided, meanwhile, the frame opening 22a can be leveled, and the flatness of the surface of the pile body is improved.

As shown in fig. 8, further, in order to solve the problem that it takes time and labor to turn over the turning molding dies 22 one by one during mold closing and mold opening, the connecting structure 3 is connected between the adjacent turning molding dies 22, so that the turning molding dies 22 form a whole, and only need to turn over once during mold closing and mold opening, and the connecting structure 3 is one or a combination of several of a connecting plate, a connecting frame, and a connecting strip. Preferably, connection structure 3 adopts the link frame, conveniently annotates the material and floating the operation.

Compared with the first, second and third embodiments, the variable cross-section square pile forming die provided by the embodiment replaces the brace connecting side die by the overturning forming die 22, has the same connecting effect, can quickly form the top bulge of the variable cross-section square pile thick pile section, and can obtain the top bulge of the variable cross-section square pile thick pile section in the following mode during production:

and fourthly, filling concrete into a forming die cavity formed after die assembly, closing the turnover forming die 22, filling concrete from a frame opening 22a of the turnover forming die 22 until the whole groove 10a of the turnover forming die 22 is filled, and then performing plastering treatment on the top. The inverted mold 22 may be closed before the molding cavity is filled with concrete, and the closing sequence is not required.

In the above-mentioned mode one to mode four, can adopt the mode of material is annotated while vibrating to go on at the in-process of annotating the material, then can not need the vibration closely knit when adopting self-compaction concrete material to pour into.

In this embodiment, the thick pile section top of the variable cross-section square pile is shaped by turning the shaping mold 22, so that the problem of difficult shaping of the variable cross-section square pile is solved, and the rapid shaping of the variable cross-section square pile is realized.

< example five >

In this embodiment, the same portions as those in the first to fourth embodiments are given the same reference numerals, and the same description is omitted.

As shown in fig. 9, in comparison with the first to fourth embodiments, the variable cross-section square pile forming mold provided in the present embodiment further includes a fixing member (not shown) and/or a tensioning member (only the fixing plate 7 of the tensioning member is shown) provided at an end portion of the open type variable cross-section square pile forming mold formed by the fixing form 1 and the movable side form 21.

In this embodiment, two ends of the open type variable cross-section square pile forming die may be a fixing component and a tensioning component, or both ends may be a fixing component or a tensioning component. When both ends adopt fixed subassembly, adopt the steel reinforcement cage after the prestressing force tensioning, just need not carry out stretch-draw processing.

The fixing assembly comprises a fixing end plate and a fastening bolt for connecting the fixing end plate with the variable-section square pile forming die; the tensioning component comprises a tensioning plate arranged in the variable cross-section square pile forming die, a fixing plate 7 arranged outside the tensioning end of the variable cross-section square pile forming die, a fastening bolt for connecting the fixing plate 7 with the variable cross-section square pile forming die, a tensioning screw for connecting the tensioning plate and a tensioning nut sleeved on the tensioning screw, before tensioning, a fixing end plate and the tensioning plate are respectively arranged at two ends of a reinforcement cage and then are placed on the variable cross-section square pile forming die (or the reinforcement cage can be placed in the variable cross-section square pile forming die firstly and then the fixing end plate and the tensioning plate are arranged), then the fixing end plate and the fixed end of the variable cross-section square pile forming die are connected through the fastening bolt, the tensioning screw is connected on the tensioning plate, the tensioning screw penetrates through the fixing plate 7 fixed at the tensioning end of the variable cross-section square pile forming die and then is connected with a tensioning machine, finally tensioning treatment is carried out, and, and rotating a tensioning nut on the tensioning screw to abut against the outer side of the fixing plate 7, and then performing subsequent operations such as material injection and the like.

And when both ends are used as tensioning ends, installing a tensioning assembly, and replacing the fixed assembly with the tensioning assembly by referring to the steps.

At present, the left end face, the right end face and the lower end face of a tensioning plate in the tensioning process of a steel reinforcement cage of a square pile are all abutted against the inner side face of a mould, but in the tensioning process, because the tensioning plate is not completely limited in the circumferential direction, the tensioning plate is caused to have a deflection problem when the stress is not uniform, and the tensioning quality is finally influenced. In order to solve the problem, referring to fig. 9 and 10, in this embodiment, a stretching deviation-preventing cover 4 is further disposed on the top of one end of the fixed form 1 or the movable side form 21 where the stretching assembly is disposed, so that during stretching, the top of the stretching plate is also abutted by the stretching deviation-preventing cover 4, so that the stretching plate does not deflect during stretching, which is beneficial to improving the stretching quality. One side of the tensioned anti-deviation die cover 4 is connected with one of the fixed die plate 1 and the movable side die 21 in a movable hinge mode, and the other side of the tensioned anti-deviation die cover 4 is connected with the other one of the movable side die 21 and the fixed die plate 1 in a bolt pressing mode during die assembly; or one side of the tension deviation-proof die cover 4 is connected with the movable side die 21 in a movable hinge mode, and the other side of the tension deviation-proof die cover is connected with the opposite movable side die 21 in a bolt pressing mode during die assembly. The bolt pressing mode can be the structure as shown in fig. 10, or the bolt can be adopted to screw the tension deviation-proof die cover 4 and the fixed template 1/movable side die 21, or the bolt can be hinged with the fixed template 1/movable side die 21 and is pressed and connected by a fastening nut after penetrating through the tension deviation-proof die cover 4.

In the first to fifth embodiments, the structural form of the hinged and reversible die is adopted, so that the problem that the conventional reinforcement cage is difficult to mount on the die after the tension plate or the fixing plate is mounted is solved. No matter the steel reinforcement cage is placed after the tension plate and the fixed end plate are installed firstly, or the tension plate and the fixed end plate are installed after the steel reinforcement cage is placed firstly, the situation that the steel reinforcement cage is difficult to install does not exist, and the cage can be conveniently installed

Some technical implementations of the first to fifth embodiments may be combined or replaced.

The technical principles of the present invention have been described above with reference to specific embodiments, but it should be noted that the above descriptions are only for explaining the principles of the present invention, and should not be interpreted as specifically limiting the scope of the present invention in any way. Based on the explanation here, those skilled in the art can conceive of other embodiments of the present invention or equivalent alternatives without creative efforts, and will fall into the protection scope of the present invention.

Claims (10)

1. The utility model provides a variable cross section square pile forming die, includes looks articulated solid fixed die plate (1) and verts template (2), its characterized in that, the shaping face of solid fixed die plate (1) and vert template (2) is provided with an at least recess (10a) along length direction interval separately, the shaping die cavity that verts template (2) and solid fixed die plate (1) compound die formed is in recess (10a) position constitutes a thick chamber section (100) respectively, and forms a thin chamber section (400) between two adjacent thick chamber sections (100), thick chamber section (100) and thin chamber section (400) are used for the thick stake section and the thin stake section of shaping variable cross section square pile respectively.

2. The forming die of the variable cross-section square pile of claim 1, wherein the tilting die plate (2) comprises a movable side die (21) hinged to one side or two sides of the fixed die plate (1) through a hinge structure; the forming surface of the inner side of the movable side die (21) is provided with the grooves (10a) at intervals along the length direction, and corresponds to the positions of the grooves (10a) on the fixed die plate (1).

3. The variable cross-section square pile forming die according to claim 2, wherein the fixed die plate (1) is bent in a die assembling side direction with the movable side die (21), and the fixed die plate (1) forms a large fillet or a large chamfer transition at the bent part of the groove (10 a).

4. The variable cross-section square pile forming die is characterized in that a sealing structure is arranged on a die assembly contact surface of the fixed die plate (1) and/or the movable side die (21).

5. The variable cross-section square pile forming die according to claim 2, wherein the fixed die plate (1) and the movable side die (21) each comprise an elongated outer die (200) and a molding lining plate (300) arranged inside the outer die (200), and the molding lining plates (300) are provided with the grooves (10a) at intervals along the length direction of the outer die (200);

the outer side of the outer die (200) is provided with a longitudinal and/or vertical reinforcing rib plate.

6. The forming die for the square pile with the variable cross section according to claim 2, wherein the tilting die plate (2) further comprises an overturning forming die (22) which is equal in number and corresponding in position to the grooves (10a) on the fixed die plate (1), and the overturning forming die (22) is provided with the grooves (10a) towards the forming die cavity;

one side of the turnover modeling mold (22) is movably connected with the top of one of the fixed template (1) and the movable side mold (21) through a hinge structure, and the other side of the turnover modeling mold (22) is locked and connected with the top of the other of the movable side mold (21) and the fixed template (1) when the mold is closed; or one side of the turnover modeling die (22) is movably connected with the top of the movable side die (21) through a hinge structure, and the other side of the turnover modeling die is in locking connection with the top of the movable side die (21) on the opposite side when the die is closed.

7. The forming die for the variable cross-section square pile according to claim 6, wherein the top of the turning and molding die (22) is provided with a frame opening (22a) communicated with the inner side groove (10 a);

a connecting structure (3) is connected between the adjacent turning modeling moulds (22); the connecting structure (3) is one or a combination of a plurality of connecting plates, connecting frames and connecting strips.

8. The forming die for the variable-section square pile is characterized in that the grooves (10a) on the fixed die plate (1) and the tilting die plate (2) are connected through a transition surface at the joint of the coarse cavity section (100) and the fine cavity section (400), and the transition surface is one or the combination of an inclined plane and an inclined conical surface;

in the direction from the bottom of the forming die cavity to the opening of the forming die cavity, the length dimension of the coarse cavity section (100) is gradually increased from the middle part of the coarse cavity section (100) to one side or two sides, and the length dimension of the transition surface in the length direction of the forming die cavity is kept equal in length or is gradually increased.

9. The variable cross-section square pile forming die according to any one of claims 2 to 8, further comprising a fixing assembly and/or a tensioning assembly arranged at the end part of the open type variable cross-section square pile forming die consisting of the fixed template (1) and the movable side die (21).

10. The variable cross-section square pile forming die according to claim 9, wherein the open type variable cross-section square pile forming die is provided with a tension deviation-proof die cover (4) at the top of one end provided with a tension assembly;

one side of the tension anti-deviation die cover (4) is connected with one of the fixed die plate (1) and the movable side die (21) in a movable hinge mode, and the other side of the tension anti-deviation die cover (4) is connected with the other one of the movable side die (21) and the fixed die plate (1) in a bolt pressing mode during die assembly; or one side of the tension deviation-proof die cover (4) is connected with the movable side die (21) in a movable hinge mode, and the other side of the tension deviation-proof die cover is connected with the opposite movable side die (21) in a bolt pressing mode during die assembly.

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