Precise tensioning equipment for prestressed square pile

Abstract

The utility model discloses a pre-stressed square pile accurate tensioning device which comprises a bottom plate, a die body is fixedly arranged at the upper end of the bottom plate, a reinforcement cage is arranged in the die body, a tensioning mechanism used for tensioning the reinforcement cage is arranged in the die body, and the tensioning mechanism is used for tensioning the reinforcement cage. The tensioning mechanism comprises a movable frame, through holes, a sliding groove, a sliding block, a fixing block, a hydraulic cylinder, a screw rod and a servo motor, the movable frame is movably arranged on one side of the interior of the mold body in a clamped mode, a plurality of through holes are evenly formed in the outer side surface of the movable frame and the outer side surface of the mold body, and the sliding groove is formed in one side of the upper end of the bottom plate. And a sliding block is movably arranged in the sliding groove in a clamped mode, a fixing block is fixedly arranged at the upper end of the sliding block, and a hydraulic cylinder is fixedly arranged in the fixing block. Two-section tensioning can be carried out, the tensioning speed is guaranteed through the contraction of the hydraulic cylinder, and the tensioning precision is guaranteed through the slow tensioning of the dense high-precision screw rod in the follow-up process.

Description

TECHNICAL FIELD

[0001] The utility model relates to square pile production technical field, concretely is a kind of prestressed square pile precision tensioning equipment. BACKGROUND

[0002] Prestressed square pile is a kind of prefabricated concrete square pile reflecting the progress of modern concrete technology and high-tech level, combines the advantages of prestressed pipe pile and traditional solid square pile, and is widely used in various construction engineering.

[0003] In the prior art, when prestressed square pile is produced, the reinforcement cage is often prestressed tensioned, then grouting is carried out, and after the concrete is solidified, the reinforcement cage is released to form the prestressed square pile. At this time, the concrete will produce compressive stress. This compressive stress can offset the tensile stress when the square pile is stressed, delay the generation of cracks, and improve the bending resistance, stiffness and durability of the structure.

[0004] In the prior art, when prestressed square pile is prestressed tensioned, the tensioning degree is often ensured by the way of hydraulic cylinder, because the hydraulic tension is large and the speed is fast, and the tensioning speed can reach 5-10 m / min, but the elongation value error is usually ±3% due to the influence of oil pressure pulsation and sealing friction, so it is easy to affect the predetermined tensioning accuracy, and therefore a prestressed square pile precision tensioning equipment needs to be improved for this problem. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a prestressed square pile precision tensioning equipment to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a prestressed square pile precision tensioning equipment, comprising a bottom plate, a mold body is fixedly arranged on the upper end of the bottom plate, a reinforcement cage is arranged in the mold body, a tensioning mechanism for tensioning the reinforcement cage is arranged in the mold body, the tensioning mechanism comprises a movable frame, a through hole, a sliding groove, a sliding block, a fixed block, a hydraulic cylinder, a screw rod and a servo motor, a movable frame is movably clamped on one side of the inside of the mold body, a plurality of through holes are uniformly formed on the outer surface of the movable frame and the mold body, a sliding groove is formed on one side of the upper end of the bottom plate, a sliding block is movably clamped in the sliding groove, a fixed block is fixedly arranged on the upper end of the sliding block, a hydraulic cylinder is fixedly arranged in the fixed block, one end of the hydraulic cylinder close to the movable frame is fixedly connected with the movable frame, a screw rod is movably arranged on the lower end of the hydraulic cylinder on one side of the mold through a bearing, a servo motor is fixedly arranged on one side of the bottom plate, and the power output shaft end of the servo motor is fixedly connected with the screw rod.

[0007] Preferably, the movable frame surface is fixedly provided with a laser range finder, the moving distance of the movable frame can be measured in real time through the laser range finder, so that the moving accuracy of the movable frame can be ensured, when the movable frame moves, the tensioning speed is ensured by first retracting the hydraulic cylinder, and after moving to the vicinity of the target position, the hydraulic cylinder and the movable frame are driven to move by rotating the screw rod, the moving distance is compensated, the high-precision screw rod transmits force through thread engagement, the theoretical accuracy can reach 0.1mm, and the actual tensioning deviation can be 1.5%.

[0008] Preferably, the hydraulic cylinder is fixedly provided with an oil pipe connector at both ends, the hydraulic cylinder, the oil circuit and the pump body can be conveniently connected through the oil pipe connector.

[0009] Preferably, the steel reinforcement cage is screw-connected with a nut at both ends, one end of the steel reinforcement cage is fixedly connected between the nut and the mold body, and the other end of the steel reinforcement cage is fixedly connected between the nut and the movable frame, the steel reinforcement cage is rolled to form threads at both ends, then the steel reinforcement cage passes through the through hole, and the steel reinforcement cage is fixedly connected with the mold body and the movable frame through the nut, so that the movable frame can tension the steel reinforcement cage.

[0010] Preferably, the fixed block is movably screw-connected to the outer surface of the screw rod at the lower end through threads, the fixed block, the hydraulic cylinder and the movable frame are driven to move along the sliding groove by rotating the screw rod, so that the steel reinforcement cage can be further tensioned.

[0011] Preferably, a stabilizing block is fixedly arranged between the bottom plate and the mold body, so as to ensure the stability between the bottom plate and the mold body.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. The utility model first drives the steel reinforcement cage to preliminarily tension through the retraction of the hydraulic cylinder, the tensioning efficiency can be ensured by the tensioning speed block of the hydraulic cylinder, when the hydraulic cylinder is retracted to the predetermined length, the position of the movable frame can be further compensated and adjusted by rotating the screw rod driven by the servo motor due to the influence of oil pressure pulsation and sealing friction, the high-precision screw rod transmits force through thread engagement, the theoretical accuracy can reach 0.1mm, the actual tensioning deviation can be 1.5%, and the tensioning accuracy can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model of a prestressed square pile precise tensioning equipment;

[0015] Figure 2 It is a sectional view of the utility model of a prestressed square pile precise tensioning equipment.

[0016] Figure 3 It is the front view of the utility model a prestressed square pile precision tensioning equipment Figure 2 ;

[0017] Figure 4 It is the dismounting view of the utility model a prestressed square pile precision tensioning equipment steel reinforcement cage.

[0018] In the drawing: 1, bottom plate; 2, mould body; 3, steel reinforcement cage; 4, movable frame; 5, through hole; 6, sliding groove; 7, sliding block; 8, fixed block; 9, hydraulic cylinder; 10, screw rod; 11, servo motor; 12, laser ranging device; 13, oil pipe connector; 14, stabilizing block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] Please refer to Figures 1-4 , the utility model provides a technical scheme: a prestressed square pile precision tensioning equipment, including bottom plate 1, the bottom plate 1 upper end fixed setting has mould body 2, the mould body 2 inside is provided with steel reinforcement cage 3, the mould body 2 inside is provided with the tensioning mechanism for tensioning steel reinforcement cage 3, the tensioning mechanism includes movable frame 4, through hole 5, sliding groove 6, sliding block 7, fixed block 8, hydraulic cylinder 9, screw rod 10, servo motor 11, the movable frame 4 is movably clamped in the mould body 2 inside one side, the movable frame 4 and the mould body 2 outside surface are evenly provided with a plurality of through holes 5, the bottom plate 1 upper end one side is provided with sliding groove 6, the sliding groove 6 inside movably clamped is provided with sliding block 7, the sliding block 7 upper end fixed setting has fixed block 8, the fixed block 8 inside fixed setting has hydraulic cylinder 9, the hydraulic cylinder 9 is fixedly connected between one end close to movable frame 4 and movable frame 4, the mould one side is provided with screw rod 10 through bearing movable setting at the lower end of hydraulic cylinder 9, the bottom plate 1 one side fixed setting has servo motor 11, the power output shaft end of servo motor 11 and screw rod 10 are fixedly connected.

[0021] The movable frame 4 is fixedly provided with a laser ranging device 12 on the surface, the movement distance of the movable frame 4 can be measured in real time through the laser ranging device, so that the movement accuracy of the movable frame 4 can be ensured, when the movable frame 4 moves, the stretching speed is ensured by first retracting the hydraulic cylinder 9, and then the hydraulic cylinder 9 and the movable frame 4 are driven to move together by rotating the screw rod 10 to compensate the movement distance, the high-precision screw rod 10 transmits force through thread engagement, the theoretical accuracy can reach 0.1mm, and the actual stretching deviation can be 1.5%;

[0022] The hydraulic cylinder 9 is fixedly provided with an oil pipe connector 13 at both ends, the hydraulic cylinder 9, the oil circuit and the pump body can be connected through the oil pipe connector 13;

[0023] The steel reinforcement cage 3 is screw-coupled at both ends, the steel reinforcement cage 3 is fixedly connected between the one end and the mold body 2 through the nut, and the other end is fixedly connected between the nut and the movable frame 4, the steel reinforcement cage 3 is rolled at both ends, then the steel reinforcement cage 3 passes through the through hole 5, and the steel reinforcement cage 3 is fixedly connected between the both ends and the mold body 2 and the movable frame 4 through the nut, so that the movable frame 4 can stretch the steel reinforcement cage 3 when moving;

[0024] The lower end of the fixed block 8 is screw-coupled on the outer surface of the screw rod 10, the fixed block 8, the hydraulic cylinder 9 and the movable frame 4 are driven to move together along the sliding groove 6 by rotating the screw rod 10, so that the steel reinforcement cage 3 can be further stretched;

[0025] The bottom plate 1 and the mold body 2 are fixedly provided with a stabilizing block 14, the stability between the bottom plate 1 and the mold body 2 can be ensured through the stabilizing block 14.

[0026] Working principle: when the device is used, the steel reinforcement cage 3 is rolled at both ends, then the steel reinforcement cage 3 passes through the through hole 5, and the steel reinforcement cage 3 is fixedly connected between the both ends and the mold body 2 and the movable frame 4 through the nut, so that the movable frame 4 can stretch the steel reinforcement cage 3 when moving; when the movable frame 4 moves, the steel reinforcement cage 3 is preliminarily stretched by retracting the hydraulic cylinder 9, the stretching speed of the hydraulic cylinder 9 can ensure the stretching efficiency, and when the hydraulic cylinder 9 is retracted to a predetermined length, the position of the movable frame 4 can be further compensated and adjusted by rotating the screw rod 10 driven by the servo motor 11, the high-precision screw rod 10 transmits force through thread engagement, the theoretical accuracy can reach 0.1mm, and the actual stretching deviation can be 1.5%;

[0027] When the movable frame 4 of the device moves, the tensioning distance of the movable frame 4 can be monitored in real time through a laser range finder, such as a Leica DISTO D5 laser range finder, which has an accuracy of ±0.5 mm, and the distance compensation of the rotation of the screw rod 10, so as to ensure the tensioning effect.

[0028] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0029] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A prestressed square pile precision tensioning equipment, comprising a bottom plate (1), characterized in that: The bottom plate (1) upper end is provided with a mold body (2), the mold body (2) is provided with a reinforcement cage (3), the mold body (2) is provided with a tensioning mechanism for tensioning reinforcement cage (3), the tensioning mechanism includes movable frame (4), through hole (5), sliding slot (6), sliding block (7), fixed block (8), hydraulic cylinder (9), screw rod (10), servo motor (11), the movable frame (4) is movably clamped on one side of the inside of the mold body (2), the movable frame (4) and the outside surface of the mold body (2) are evenly provided with a plurality of through holes (5), the bottom plate (1) upper end is provided with a sliding slot (6), the sliding slot (6) is movably clamped with a sliding block (7), the sliding block (7) is fixedly provided with a fixed block (8) on the upper end, the fixed block (8) is fixedly provided with a hydraulic cylinder (9) in the inside, the end of the hydraulic cylinder (9) close to the movable frame (4) is fixedly connected with the movable frame (4), the screw rod (10) is movably arranged on the one side of the mold below the hydraulic cylinder (9) through the bearing, the bottom plate (1) is fixedly provided with a servo motor (11) on one side, the power output shaft end of the servo motor (11) is fixedly connected with the screw rod (10).

2. The precision tensioning device for prestressed square piles according to claim 1, characterized in that: The surface of the movable frame (4) is fixedly provided with a laser ranging device (12).

3. The precision tensioning device for prestressed square piles according to claim 1, characterized in that: The hydraulic cylinder (9) is fixedly provided with an oil pipe connector (13) at both ends.

4. The precision tensioning device for prestressed square piles according to claim 1, characterized in that: The reinforcement cage (3) is provided with a nut at both ends.

5. The precision tensioning device for prestressed square piles according to claim 1, characterized in that: The lower end of the fixed block (8) is movably screwed on the outside surface of the screw rod (10).

6. The precision tensioning device for prestressed square piles according to claim 1, characterized in that: The bottom plate (1) and the mold body (2) are fixedly provided with a stabilizing block (14).

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