CN216578491U

CN216578491U - Production device of prestressed concrete pile

Info

Publication number: CN216578491U
Application number: CN202121164007.9U
Authority: CN
Inventors: 俞盈盈; 俞晓东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-05-24
Anticipated expiration: 2031-05-27

Abstract

The utility model relates to a production device of a prestressed concrete pile, which comprises a mould and a tensioning structure and is characterized in that: the tensioning structure also comprises a first baffle, a tensioning plate, a first supporting plate and a tensioning rod; the first baffle and the tensioning plate are respectively provided with a through hole for the prestressed tendon to pass through, so that the prestressed tendon is anchored on the tensioning plate after passing through the first baffle; the tensioning rod penetrates through the first supporting plate and then is connected with the tensioning plate and can drive the tensioning plate to move to achieve tensioning. The prestressed concrete pile has the advantages of safe and reliable tension release of the prestressed main reinforcements, and also provides possibility for manufacturing prestressed concrete piles without end plates.

Description

Production device of prestressed concrete pile

Technical Field

The utility model belongs to the technical field of pile foundation engineering of various building structure systems, and particularly relates to a production device of a prestressed concrete pile.

Background

The utility model discloses a concrete pipe pile with steel strands, which is disclosed in the Chinese patent application with the application number of CN200510050212.1 (with the publication number of CN 1687534A). The prestressed main reinforcement of the concrete pipe pile adopts the steel strands, an end plate is provided with a stretching hole, and the steel strands penetrate through the stretching hole to form an anchorage. However, the patent application does not disclose how to specifically realize the connection and the anchorage of the steel strand and the end plate and a specific production method thereof, and for a person skilled in the field of manufacturing the pre-tensioning centrifugal concrete pile, because of large industrial span, the person skilled in the art generally cannot know how to apply the steel strand to the production of the pre-tensioning centrifugal concrete pile; in addition, according to the technical scheme described by the technical scheme and the attached drawings of the patent application, the end face of the formed pile body is provided with a protruding anchorage device, so that pile splicing is impossible, and the protruding anchorage device is easy to break in the construction piling process, so that the prestress of the pile body is damaged, and the technical performances of bending resistance, shearing resistance and the like of the pile body are reduced. Therefore, the steel strand cannot be produced according to the technical scheme disclosed by the patent, and even if the steel strand is produced, the steel strand cannot be applied to pile foundation engineering at all.

In view of the above current situation, the present applicant has proposed an improved scheme, for example, the chinese patent of invention No. ZL201410034909.9 (publication No. CN163741673B) "a self-anchored steel strand pretensioned centrifugal concrete pile and manufacturing method" discloses such a pile, which includes a hollow concrete pile body, a reinforcement cage located in the concrete pile body; the reinforcement cage comprises prestressed main reinforcements arranged axially, stirrups wound outside the main reinforcements and at least one end plate positioned at the end part of the concrete pile body; at least one end part of the concrete pile body is sleeved with a pile hoop, and the pile hoop and the end plate are fixedly connected or integrally formed into a steel drum structure; the pile hoop or the end plate is fixedly connected with an anchoring rib; the method is characterized in that: the prestressed main reinforcements are steel strands, at least one end plate is provided with a plurality of through holes for the steel strands to pass through, the through holes and the steel strands are in one-to-one correspondence, so that the steel strands passing through the through holes of the end plate can be connected with an external steel strand locking structure, and the steel strands are tensioned and locked by the steel strand locking mechanism before centrifugal forming; the end plate is also provided with a plurality of threaded connecting holes for connecting with the steel strand locking structure, and the end plate is not subjected to the retraction force of the steel strand.

The existing prestressed concrete pile and the production device have the following defects in the preparation process.

1. The piles in the two aforementioned patents are both concrete piles with end plates, and the arrangement of the end plates greatly increases the production cost of the piles.

2. The stretching of the prestressed main bar (the steel strand can also be a steel bar or a deformed steel bar) needs to respectively stretch each steel strand by using a through jack, the steel strands are stretched to a specified value, and the steel strands are locked by a chuck component, so that the efficiency is low due to single stretching;

3. importantly, the prestressed main reinforcements (steel strands can also be steel bars or deformed steel bars) are expanded in the preparation process in the following mode, the steel strands between the anchoring plates and the tensioning plates are directly cut off and expanded, the expanding mode has great potential safety hazards, the prestressed reinforcements have great prestress before expansion, the prestressed reinforcements are directly cut off, the steel strands can fly out like bullets, and the steel plates can be impacted by the steel strand locking structures or the anchoring piers flying out in the actual process.

In summary, how to produce a production device for prestressed concrete piles without end plates, capable of synchronously tensioning and safely releasing the prestressed concrete piles is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the defects of the prior art are overcome, and provides a safe and reliable prestressed concrete pile production device for placing and stretching prestressed main reinforcements.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a apparatus for producing of prestressed concrete pile, includes mould and tension structure, its characterized in that: the tensioning structure also comprises a first baffle, a tensioning plate, a first supporting plate and a tensioning rod; the first baffle and the tensioning plate are respectively provided with a through hole for the prestressed tendon to pass through, so that the prestressed tendon is anchored on the tensioning plate after passing through the first baffle; the tensioning rod penetrates through the first supporting plate and then is connected with the tensioning plate and can drive the tensioning plate to move to achieve tensioning.

In the production process, the first baffle plate plays a role in blocking and restraining one end of the concrete pile, so that the first baffle plate cannot axially displace in the manufacturing process of the concrete pile, and for the purpose, the first baffle plate can be fixed in a mold, so that the first baffle plate cannot axially move relative to the mold when the concrete is tensioned and poured.

In order to realize the restraint of the first baffle, the first baffle and the first supporting plate can be connected together through a first connecting structure, so that the relative position of the first baffle and the first supporting plate is fixed.

As a best implementation structure of the first connection structure, the first connection structure includes a plurality of first connection screws and a plurality of first supporting screws, a rod portion of each first connection screw passes through the first supporting plate and the tensioning plate and then is in threaded connection with the first baffle, and a rod portion of each first supporting screw is in threaded connection with the first supporting plate and then passes through the tensioning plate and then supports the first baffle. This mode is fixed through one draw a top realization first baffle and backup pad relative position, and first baffle keeps fixed under two opposite power effects of pulling force and apical force promptly, and first baffle is fixed more stably firm.

As a second implementation structure of the first connection structure, the first connection structure includes a plurality of first positioning screws, each of the first positioning screws has a first thread section, a second thread section and a first positioning rod section located between the first thread section and the second thread section, the two ends of the first positioning rod section are respectively provided with a first limiting stop shoulder and a second limiting stop shoulder, the first positioning rod section penetrates through the tensioning plate, the first thread section is in threaded connection with the first baffle plate, the first limiting stop shoulder is used for supporting the first baffle plate, the second thread section penetrates through the first support plate and then is connected with the locking nut, and the second limiting stop shoulder is used for supporting the first support plate. This structure assembly is inconvenient, need pass stretch-draw version back threaded connection with the positioning screw earlier on the baffle, again with the backup pad assembly, let positioning screw pass the backup pad, lock with lock nut at last, need two spacing fender shoulders cooperation to accomplish simultaneously and connect. The structure is more complex than the first connection structure and the requirements on the position of the shoulder stops are higher.

In order to realize that the other end of the concrete pile does not have an end plate, the other end of the die opposite to the tensioning structure is provided with an anchoring structure, the anchoring structure comprises a second baffle and a second supporting plate, the second baffle is arranged in the die, the second supporting plate supports against the other end of the die, the prestressed tendon penetrates through the second baffle and then is anchored on the second supporting plate, and a third space is formed between the second baffle and the second supporting plate. The third space is used for the cutting tool to extend into so as to cut off the prestressed ribs exposed out of the second baffle.

In the production process, the second baffle plays a role in blocking and restraining the other end of the concrete pile, so that the second baffle cannot axially move in the manufacturing process of the concrete pile, and for achieving the purpose, the second baffle can be fixed in a mold, so that the second baffle cannot axially move relative to the mold when the concrete is tensioned and poured and tamped.

In order to realize the restraint of the second baffle plate, the second baffle plate and the second support plate can be connected together through a second connecting structure, so that the relative position of the second baffle plate and the second support plate is fixed.

Preferably, the second connecting structure includes a plurality of second connecting screws and a plurality of second supporting screws, a rod portion of each second connecting screw penetrates through the second supporting plate and then is in threaded connection with the second baffle, a rod portion of each second supporting screw penetrates through and is in threaded connection with the second supporting plate, and a rod portion of each second supporting screw movably penetrates through the second supporting plate and then abuts against the second baffle.

Optionally, the second connecting structure includes a plurality of second positioning screws, each second positioning screw has a cap, a threaded rod section, and a second positioning rod section located between the cap and the threaded rod section, a limiting shoulder is formed at an inner end of the second positioning rod section, the cap is pressed against an outer end face of the second support plate, the second positioning rod section passes through the second support plate and then is in threaded connection with the second baffle, and the limiting shoulder is used for supporting the second baffle.

Compared with the prior art, the utility model has the advantages that: the first baffle is arranged in the die and is not connected with the prestressed tendon (the prestressed tendon is not connected with the first baffle through an anchoring structure), the first baffle plays a part of the function of an end plate, a tensioning plate, a first supporting plate and a tensioning rod are further arranged for tensioning, the tensioning plate is also arranged in the die, the first supporting plate is abutted against one end of the die, the tensioning plate is positioned between the first baffle and the first supporting plate, the second space provides a moving space for the tensioning plate in the tensioning process, and the tensioning rod penetrates through the first supporting plate and is connected with the tensioning plate and can drive the tensioning plate to move to achieve tensioning; after tensioning is finished, pouring and tamping concrete to form a concrete pile, then releasing tension, after the releasing tension is finished, the shearing tool stretches into the first space to shear the prestressed tendons exposed out of the first baffle, and the prestressed tendons are released before shearing, so that the prestressed tendons do not apply prestress tension to the anchoring structure, and the steel strand locking structure or the anchoring pier head cannot fly out quickly. After the forming is completed, the first baffle plate can be taken out relative to the concrete pile for next use, and finally the prestressed reinforcing steel exposed out of one end of the concrete pile is cut off and polished, so that the prestressed reinforcing steel is not exposed out of the outer end face of the concrete pile, and the concrete pile without the end plate at least at one end is prepared, so that the cost of the concrete pile is greatly reduced due to the fact that one end plate is omitted.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is an enlarged view of the point A of FIG. 1;

FIG. 3 is an enlarged view of the point B of FIG. 1;

FIG. 4 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 5 is an enlarged view at C of FIG. 4;

fig. 6 is an enlarged view of fig. 4 at D.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in FIGS. 1 to 3, a first preferred embodiment of the present invention is described.

The utility model provides a apparatus for producing of prestressed concrete pile, includes mould 10 and tension structure, its characterized in that: the tensioning structure further comprises a first baffle 1, a tensioning plate 2, a first supporting plate 3 and a tensioning rod 4; the first baffle plate 1 and the tension plate 2 are both provided with through holes 5a for the prestressed tendons 5 to pass through, so that the prestressed tendons 5 pass through the first baffle plate 1 and then are anchored on the tension plate 2 through an anchoring structure 51, the prestressed tendons 5 in the embodiment are steel stranded wires, the anchoring structure can refer to the prior art, generally, two types are provided, one type is an anchoring structure 51 for the steel stranded wires, the anchoring structure is an anchor ring clamping piece, and the previous patent of the applicant can be referred to; the other type is an anchoring structure for the steel bar, and a structure that 8-shaped holes are matched with pier heads of the steel bar is adopted. The first baffle plate 1 and the tensioning plate 2 are arranged in the die 10, the first supporting plate 3 props against one end of the die 10, the tensioning plate 2 is located between the first baffle plate 1 and the first supporting plate 3, a first space Q1 is formed between the first baffle plate 1 and the tensioning plate 2, the first space Q1 facilitates a shearing tool to stretch into the space to cut off the prestressed tendon 5, a second space Q2 is formed between the tensioning plate 2 and the first supporting plate 3, and the second space Q2 provides a moving space for the tensioning plate 2 during tensioning; after penetrating through the first supporting plate 3, the tensioning rod 4 is connected with the tensioning plate 2 and can drive the tensioning plate 2 to move to realize tensioning, and the structure for connecting the tensioning rod 4 with the tensioning plate 2 and the tensioning mode are in the prior art.

The first baffle plate 1 and the first support plate 3 in the embodiment are connected together through the first connecting structure 6, so that the relative positions of the first baffle plate 1 and the first support plate 3 are fixed. Of course, the first apron 1 may also be fixed in the mould 10 so that the first apron 1 cannot move axially relative to the mould 10 during the tensioning and the casting of concrete.

Specifically, first connecting structure 6 includes many first connecting screw 61 and many first tops and supports screw 62, and first connecting screw 61 and first top support screw 62 respectively have three, along circumference interval equipartition, first connecting screw 61's pole portion pass behind first backup pad 3 and the stretch-draw board 2 with 1 threaded connection of first baffle, first top support screw 62's pole portion threaded connection on first backup pad 3 and pass and prop first baffle 1 behind the stretch-draw board 2, have first nut 31 to form the screw hole that supplies first top support screw 62 threaded connection at 3 outer end face welding of first backup pad.

And the other end of the die 10 opposite to the tensioning structure is provided with an anchoring structure, the anchoring structure comprises a second baffle 7 and a second supporting plate 8, the second baffle 7 is arranged in the die 10, the second supporting plate 8 supports the other end of the die 10, the prestressed tendon 5 passes through the second baffle 7 and then is anchored on the second supporting plate 8 through an anchoring structure 51, and a third space Q3 is formed between the second baffle 7 and the second supporting plate 8.

The second baffle 7 and the second support plate 8 in this embodiment are connected together by a second connecting structure 9, so that the relative positions of the second baffle 7 and the second support plate 8 are fixed. Of course, the second apron 7 can also be fixed in the mould 10 so that the second apron 7 cannot move axially relative to the mould 10 during the tensioning and the casting of concrete.

Specifically, the second connecting structure 9 includes a plurality of second connecting screws 91 and a plurality of second supporting screws 92, a rod portion of the second connecting screw 91 penetrates through the second supporting plate 8 and then is in threaded connection with the second baffle plate 7, a rod portion of the second supporting screw 92 penetrates through and is in threaded connection with the second supporting plate 8, the rod portion of the second supporting screw 92 movably penetrates through the second supporting plate 8 and then abuts against the second baffle plate 7, and a second nut 81 is welded to the outer end face of the second supporting plate 8 to form a threaded hole for the threaded connection of the second supporting screw 92.

The first baffle plate 1 is arranged in a die 10 and is not connected with the prestressed tendon 5 (the prestressed tendon 5 is not connected with the first baffle plate 1 through an anchoring structure), the first baffle plate 1 plays a part of an end plate, in order to realize tensioning, a tensioning plate 2, a first supporting plate 3 and a tensioning rod 4 are further arranged, the tensioning plate 2 is also arranged in the die 10, the first supporting plate 3 abuts against one end of the die 10, the tensioning plate 2 is positioned between the first baffle plate 1 and the first supporting plate 3, a second space Q2 provides a moving space for the tensioning plate 2 in the tensioning process, and the tensioning rod 4 penetrates through the first supporting plate 3 and is connected with the tensioning plate 2 and can drive the tensioning plate 2 to move to realize tensioning; after tensioning is finished, pouring and tamping concrete to form a concrete pile, then tensioning, after tensioning is finished, removing the first connecting screw rod 61 and the first supporting screw rod 62, and the second connecting screw rod 91 and the second supporting screw rod 92, then extending the shearing tool into the first space Q1 to shear off the prestressed ribs 5 exposed out of the first baffle plate 1, extending the shearing tool into the third space Q3 to shear off the prestressed ribs 5 exposed out of the second baffle plate 7, and because tensioning is finished before shearing the prestressed ribs 5, the prestressed ribs 5 do not apply prestress to the anchoring structure (the steel strand locking structure or the anchoring pier head), and the steel strand locking structures or the anchoring pier heads at two ends cannot rapidly fly out. After the forming is finished, the first baffle plate 1 can be taken out relative to the concrete pile for next use, and finally the prestressed reinforcement 5 exposed out of one end of the concrete pile is cut off and polished, so that the prestressed reinforcement 5 is not exposed out of the outer end face of the concrete pile, the concrete pile with at least one end without an end plate is prepared, and the cost of the concrete pile is greatly reduced due to the fact that one end plate is omitted.

FIGS. 4 to 6 show a second embodiment of the present invention.

The present embodiment differs from the first embodiment in the first connection structure 6 and the second connection structure 9.

First connecting structure 6 includes many first positioning screw 63, and first positioning screw 63 has four along the circumference equipartitions, and first positioning screw 63 has first screw thread section 631, second screw thread section 632 and is located first screw thread section 631 and second screw thread section 633 between, the both ends of first positioning screw section 633 have respectively that first spacing keeps off shoulder 634 and second spacing fender shoulder 635, first positioning screw section 633 passes stretch-draw board 2, first screw thread section 631 and first baffle 1 threaded connection, first spacing fender shoulder is used for propping up and holds first baffle 1, second screw thread section 632 passes behind first backup pad 3 and is connected with lock nut 64, and second spacing fender shoulder 635 is used for propping up and holds first backup pad 3.

The second connection structure 9 includes a plurality of second positioning screws 93, the second positioning screws 93 have cap portions 931 and threaded rod sections 932, and second positioning rod sections 933 located between the cap portions 931 and the threaded rod sections 932, the inner ends of the second positioning rod sections 933 are formed with limit stop shoulders 934, the cap portions 931 are pressed against the outer end face of the second supporting plate 8, the second positioning rod sections 933 are threaded with the second baffle 7 after penetrating through the second supporting plate 8, and the limit stop shoulders 934 are used for propping against the second baffle 7.

It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "up, down", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. The utility model provides a apparatus for producing of prestressed concrete pile, includes mould (10) and stretch-draw structure, its characterized in that: the tensioning structure also comprises a first baffle (1), a tensioning plate (2), a first supporting plate (3) and a tensioning rod (4); the first baffle (1) and the tensioning plate (2) are respectively provided with a through hole (5a) for the prestressed tendon (5) to pass through, so that the prestressed tendon (5) passes through the first baffle (1) and then is anchored on the tensioning plate (2), the first baffle (1) and the tensioning plate (2) are arranged in a die (10), the first supporting plate (3) props against one end of the die (10), the tensioning plate (2) is positioned between the first baffle (1) and the first supporting plate (3), a first space (Q1) is formed between the first baffle (1) and the tensioning plate (2), and a second space (Q2) is formed between the tensioning plate (2) and the first supporting plate (3); the tensioning rod (4) penetrates through the first supporting plate (3) and then is connected with the tensioning plate (2) and can drive the tensioning plate (2) to move to achieve tensioning.

2. The apparatus for producing a prestressed concrete pile according to claim 1, wherein: the first apron (1) is fixed in the mould (10) in such a way that the first apron (1) cannot move axially relative to the mould (10) during the tensioning and the casting of concrete.

3. The apparatus for producing a prestressed concrete pile according to claim 1, wherein: the first baffle (1) and the first supporting plate (3) are connected together through a first connecting structure (6) so that the first baffle (1) and the first supporting plate (3) are fixed in relative positions.

4. A production apparatus for a prestressed concrete pile according to claim 3, characterized in that: first connection structure (6) include many first connecting screw (61) and many first tops and hold screw (62), the pole portion of first connecting screw (61) pass behind first backup pad (3) and stretch-draw board (2) with first baffle (1) threaded connection, the pole portion threaded connection of first top support screw (62) is on first backup pad (3) and pass and prop after stretch-draw board (2) first baffle (1).

5. A production apparatus for a prestressed concrete pile according to claim 3, characterized in that: first connection structure (6) include many first positioning screw (63), first positioning screw (63) have first screw thread section (631), second screw thread section (632) and are located first screw thread section (631) and second screw thread section (632) between first positioning screw section (633), the both ends of first positioning screw section (633) have respectively first spacing fender shoulder (634) and second spacing fender shoulder (635), first positioning screw section (633) pass a stretch-draw board (2), first screw thread section (631) and first baffle (1) threaded connection, first spacing fender shoulder is used for holding first baffle (1), second screw thread section (632) are connected with lock nut (64) after passing first backup pad (3), and second spacing fender shoulder (635) are used for holding first backup pad (3).

6. The apparatus for producing a prestressed concrete pile according to claim 1, wherein: with the other end of the relative mould of tension structure (10) is equipped with anchor structure, anchor structure includes second baffle (7) and second backup pad (8), second baffle (7) set up in mould (10), and second backup pad (8) support the other end of mould (10), prestressing tendons (5) pass second baffle (7) back anchor on second backup pad (8), be formed with third space (Q3) between second baffle (7) and second backup pad (8).

7. The apparatus for producing a prestressed concrete pile according to claim 6, wherein: the second apron (7) is fixed in the mould (10) in such a way that the second apron (7) cannot move axially relative to the mould (10) during the tensioning and the casting of concrete.

8. The apparatus for producing a prestressed concrete pile according to claim 6, wherein: the second baffle plate (7) and the second support plate (8) are connected together through a second connecting structure (9) so that the relative positions of the second baffle plate (7) and the second support plate (8) are fixed.

9. The apparatus for producing a prestressed concrete pile according to claim 8, wherein: the second connecting structure (9) comprises a plurality of second connecting screw rods (91) and a plurality of second jacking screw rods (92), the rod parts of the second connecting screw rods (91) penetrate through the second supporting plate (8) and then are in threaded connection with the second baffle (7), the rod parts of the second jacking screw rods (92) penetrate through the second supporting plate (8) and are in threaded connection with the second supporting plate (8), and the rod parts of the second jacking screw rods (92) movably penetrate through the second supporting plate (8) and then are jacked against the second baffle (7).

10. The apparatus for producing a prestressed concrete pile according to claim 8, wherein: the second connecting structure (9) comprises a plurality of second positioning screws (93), each second positioning screw (93) is provided with a cap portion (931), a threaded rod section (932) and a second positioning rod section (933) located between the cap portion (931) and the threaded rod section (932), a limiting blocking shoulder (934) is formed at the inner end of the second positioning rod section (933), the cap portion (931) is pressed on the outer end face of the second supporting plate (8), the second positioning rod section (933) penetrates through the second supporting plate (8) and then is in threaded connection with the second baffle (7), and the limiting blocking shoulder (934) is used for propping against the second baffle (7).