First-tight working frame of pre-tensioning prestress tension platform

Abstract

The utility model relates to a first tightening working frame of pre-tensioning method prestress tension platform, including support frame and tension assembly, support frame lower part places on base surface, and the front side extension of support frame has a plurality of limit rods, and the limit rod end surface is contacted with prefabricated anchoring beam pouring mold, and tension assembly includes chain hoist and tension nut, and chain hoist is fixed with the support frame far away from prefabricated anchoring beam pouring mold one side, and the pull hook of chain hoist is connected between tension nut, and tension nut cooperates with the anchoring rod end portion that projects prefabricated anchoring beam pouring mold one side. The first tightening working frame of pre-tensioning method prestress tension platform tension force transmission along the anchoring rod axis, and there is no transverse shear force, and the initial tension error is less than or equal to 2%, and the quality hidden danger of " too tight, not tight " is eliminated, and the rapid displacement can be completed workstation shift by a person, and the limit rod and the gap realize pouring mold, anchor box, support frame plane positioning, and the frame zero slip in the tension process.

Description

Technical Field

[0001] This utility model relates to the field of pre-tensioned precast component production technology, and in particular to a pre-tensioning work frame that can quickly pre-tension anchor rods at the end of a long-line platform and simultaneously position the mold. Background Technology

[0002] Before pre-tensioning, the anchor rods need to be inserted into the mold and initial tension (commonly known as "initial tightening") to make the anchor rods straight and flat, so as to avoid uneven stress on each strand during the subsequent overall tensioning. However, the existing practice has the following defects: (1) The manual hand hoist is directly hooked onto the exposed threaded section of the anchor rod, and the thread is easily bitten by the lateral shear force, which makes it impossible to tighten the anchor nut later; (2) There is no quantitative basis for the initial tensioning force, and it is operated based on experience, which has large errors and often results in the deformation of the mold due to over-tightening; (3) There is no relative positioning between the hoist and the mold during the tensioning process. When the anchor rod rebounds, the hoist slides as a whole, which requires repeated repositioning, which is inefficient and poses a safety hazard; (4) The long line platform needs to be set with multiple sets of initial tensioning devices at intervals. The existing fixed gantry frame is large in size and difficult to move, which affects the production line rhythm.

[0003] Patent application number CN201320339055.6 discloses a prestressed concrete platform for pre-tensioning, belonging to the field of bridge construction. It includes a top plate, an external fastening device, vertical plates, horizontal plates, facing steel plates, and a bottom plate. Two vertical plates are fixed vertically to both ends of the bottom plate. The top plate and horizontal plates are placed parallel to each other from top to bottom. Four facing steel plates are fixed to both ends of the two vertical plates. Corresponding through-rib grooves are formed in the middle of each of the two vertical plates. The external fastening device includes a main plate, a base, and a support plate. The main plate is vertically fixed to one side of the base, and the support plate is vertically fixed to the middle of the main plate. Through-rib holes are formed on the main plate. A downward-facing corrugated groove is formed on the upper surface of the support plate.

[0004] However, the pre-tensioned prestressed platform in the aforementioned patented technology does not have an initial tightening function, cannot solve the defects in the prior art, and does not provide any technical inspiration for solving the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a pre-tensioning working frame for a pre-tensioning prestressed tensioning table, in order to solve the problems mentioned in the background art above:

[0006] (1) How to provide a pre-tensioning work frame for a pre-tensioning prestressing tensioning table that is easy to move, reliable in positioning, quantitative in tensioning, and with zero damage to the threads.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A pre-tensioning working frame for a pre-tensioning method of prestressed tensioning table;

[0009] Includes the support frame and tensioning components;

[0010] The lower part of the support frame is placed on the foundation surface, and several limiting rods extend from the front side of the support frame. The end face of the limiting rods contacts the casting mold of the precast anchor beam.

[0011] The tensioning assembly includes a hand chain hoist and a tensioning nut. The hand chain hoist is fixed to the support frame on the side away from the precast anchor beam casting mold. The hook of the hand chain hoist is connected to the tensioning nut. The tensioning nut is engaged with the end of the anchor rod that extends out of the precast anchor beam casting mold.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, several pulleys are installed at the bottom of the support frame.

[0014] Furthermore, a pull ring is fixedly connected to the end face of the tension nut on the side away from the precast anchor beam casting mold.

[0015] Furthermore, the hook of the hand chain hoist is connected to the pull ring of the tightening nut by a rope loop.

[0016] Furthermore, there are notches between several limiting rods of the support frame for placing the anchor box of the precast anchor beam casting mold.

[0017] The beneficial effects of the initial tensioning frame of the prestressed tensioning table in this pre-tensioning method are:

[0018] (1) Zero thread damage, tension force is transmitted along the anchor rod axis, and there is no transverse shear force;

[0019] (2) Tensioning force is optimized, and the initial tension error is ≤2%, eliminating the quality risks of "over-tightening" and "under-tightening";

[0020] (3) Rapid shifting, with brake pulleys, a single person can complete the workstation transfer in 30 seconds, meeting the cycle time requirements of long line platform with multiple components;

[0021] (4) The limiting rod and notch realize the planar positioning of the casting mold, anchor box and support frame, and the frame slips during the tensioning process. Attached Figure Description

[0022] Figure 1 This is a diagram showing the usage state of the first tensioning frame of the prestressed tensioning table.

[0023] Figure 2 This is a three-dimensional view of the support frame and hand-operated hoist in the first tensioning work frame embodiment of the prestressed tensioning table of this prestressed method.

[0024] Figure 3 This is a perspective view of the anchor rod and tensioning nut in the first tightening working frame embodiment of the prestressed tensioning table of this pre-tensioning method.

[0025] Explanation of the labels in the diagram:

[0026] Support frame - 100; Pulley - 110; Limiting rod - 120; Notch - 130; Hand chain hoist - 210; Hook - 211; Tensioning nut - 220; Pull ring - 221; Rope ring - 230; Casting mold - 300; Anchor box - 310; Anchor rod - 400; Self-contained nut - 410. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] The terms “vertical,” “horizontal,” “left,” “right,” and similar expressions used in this document are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 3 .

[0031] The prestressing tensioning table of this prestressed tensioning method includes a support frame 100 and a tensioning assembly.

[0032] The support frame 100 is a steel frame structure. Four pulleys 110 are installed at the bottom of the support frame 100. The pulleys 110 have a braking function. The four rollers of the support frame 100 are in contact with the foundation surface. Four limiting rods 120 extend from the front side of the support frame 100. The end face of the limiting rods 120 is in contact with the precast anchor beam casting mold 300. The lower part of the support frame 100 near the precast anchor beam casting mold 300 is provided with a notch 130 for placing the anchor box 310 of the precast anchor beam casting mold 300. The notch 130 is left between the limiting rods 120. The width of the notch 130 is greater than or equal to the width of the anchor box 310, and the depth of the notch 130 is greater than or equal to the thickness of the anchor box 310, so that the anchor box 310 can be embedded into the frame as a whole, realizing the planar positioning of the mold, the anchor box 310, and the support frame 100.

[0033] The tensioning assembly includes a hand chain hoist 210 and a tensioning nut 220. The hoist 210's own lifting rope passes around the support frame 100 on the side away from the precast anchor beam casting mold 300, thereby fixing the main body of the hand chain hoist 210 to the support frame 100.

[0034] The tension nut 220 is threaded to the end of the anchor rod 400 extending from the precast anchor beam casting mold 300. A pull ring 221 is welded and fixed to the end face of the tension nut 220 away from the precast anchor beam casting mold 300. The hook 211 of the hand chain hoist 210 is connected to the pull ring 221 of the tension nut 220 through a rope ring 230.

[0035] When in use, push the first tensioning frame of the prestressed prestressing tensioning table to the end of the precast anchor beam casting mold 300, so that the limiting rod 120 is pressed against the end plate of the precast anchor beam casting mold 300, and the anchor box 310 naturally falls into the notch 130 of the support frame 100. Step on the brake of the pulley 110; screw the tension nut 220 into the exposed thread of the anchor rod 400 and tighten it slightly with a wrench.

[0036] The chain hoist 210 hook 211 is connected to the pull ring 221 through the rope ring 230, and the chain is slowly pulled; when the set initial tension is reached, it stops, the anchor rod 400's own nut 410 is tightened, the chain hoist 210 is removed, and the initial tightening is completed; after the overall tensioning is completed, the tension nut 220 is unscrewed in the opposite direction for reuse, and the threaded section is not damaged by lateral compression.

[0037] The above description is only one embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. A pre-tensioning working frame for a pre-tensioning prestressed tensioning table, characterized in that: Includes a support frame (100) and a tensioning assembly; The lower part of the support frame (100) is placed on the foundation surface, and a number of limiting rods (120) extend from the front side of the support frame (100). The end face of the limiting rods (120) contacts the precast anchor beam casting mold (300). The tensioning assembly includes a hand chain hoist (210) and a tensioning nut (220). The hand chain hoist (210) is fixed to a support frame (100) on the side away from the precast anchor beam casting mold (300). The hook (211) of the hand chain hoist (210) is connected to the tensioning nut (220). The tensioning nut (220) engages with the end of the anchor rod (400) extending from the side of the precast anchor beam casting mold (300).

2. The initial tensioning frame of the prestressed tensioning table according to claim 1, characterized in that: The bottom of the support frame (100) is equipped with several pulleys (110).

3. The initial tensioning frame of the prestressed tensioning table according to claim 1, characterized in that: A pull ring (221) is fixedly connected to the end face of the tension nut (220) on the side away from the precast anchor beam casting mold (300).

4. The initial tensioning frame of the prestressed tensioning table according to claim 3, characterized in that: The hook (211) of the hand chain hoist (210) is connected to the pull ring (221) of the tightening nut (220) by a rope loop (230).

5. The initial tensioning frame of the prestressed tensioning table according to claim 1, characterized in that: The support frame (100) has notches (130) between several limiting rods (120) for placing the anchor box (310) of the precast anchor beam casting mold (300).

Images