Special anchor box device for pre-tensioning prestress tension platform

Abstract

The utility model discloses a special anchor box device of prestressed tension platform of pre-tensioning method, including anchor box body and clamping subassembly. Anchor box body is along the front and back end surface and is provided with a plurality of anchoring through -hole, and inside upper and lower parallel arrangement first, second clamping chamber is equipped with the bending chute in the left and right sides. Clamping subassembly is by first, second clamping plate, steel ball and reset spring constitute, and the clamping plate corresponding chamber can move slightly, and is respectively arranged in the inner arc surface and is provided with the sawtooth shape clamping plate. The first clamping plate lower end stretches out two branches. When using, the anchor rod is passed through the anchoring through -hole, and the anchor box dead weight makes the first clamping plate move down, and the steel ball rolls and forces the second clamping plate to move up, realizes " to clamp " self -lock, when releasing, lifts the branch, and the reset spring pushes the clamping plate and releases, and the anchor rod can be quickly drawn out. The device is pure mechanical self -lock, does not need hydraulic pressure or wedge conical surface, thoroughly eliminates the risk of silk slip and silk break, can be synchronous anchoring to many roots, is applicable to long line pedestal high frequency pre-tensioning method production.

Description

Technical Field

[0001] This utility model belongs to the field of prestressed construction technology in building engineering, and specifically relates to a special anchor box device for a prestressed tensioning table. Background Technology

[0002] Prestressed tensioning tables are commonly used equipment in the production of precast components. Their ends require temporary anchorage of the anchor rods via anchor boxes to ensure stable tension in the prestressing tendons during tensioning and concrete pouring. However, existing technologies have the following drawbacks:

[0003] (1) The surface hardness and smoothness of the anchor bolt are sensitive, and it is easy to slip or break the bolt during the tensioning process, which poses a great safety hazard.

[0004] (2) The anchor assembly needs to be completed before tensioning. Both the anchoring and tensioning processes require special jacks or tensioning devices, which involve many procedures and a long cycle.

[0005] (3) Existing anchor boxes are large in size and heavy in weight, making them inconvenient to transport and difficult to meet the needs of multiple simultaneous tensioning on long-line platforms.

[0006] Patent application number CN202421392660.4 relates to the technical field of bridge construction, specifically an anchoring device for prestressed tensioning of steel box girder cap beams. The device includes an inner tensioning anchor plate and an outer tensioning anchor plate. The inner tensioning anchor plate is connected to the prestressed anchoring zone of the cap beam, and the outer tensioning anchor plate is located on the side of the inner tensioning anchor plate facing away from the cap beam. Both the inner and outer tensioning anchor plates have multiple through holes arranged in a rectangular array. A support member is provided between the inner and outer tensioning anchor plates. This tensioning anchoring device solves the problems of existing technologies where prestressed tendons are anchored using fixed platforms or steel molds, resulting in large anchoring device footprints and cumbersome operations requiring tensioning and releasing at a designated site before being transported to the construction site.

[0007] However, the anchoring device in the aforementioned patented technology cannot provide additional clamping force for the anchor rod, posing certain safety hazards during the casting of precast anchoring beams. Utility Model Content

[0008] The purpose of this utility model is to provide a special anchor box device for a prestressed tensioning table in the pre-tensioning method, so as to solve the problems mentioned in the background art above:

[0009] (1) How to achieve self-locking clamping and quick assembly / disassembly functions to solve the problem of poor anchoring reliability in the existing technology.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A special anchor box device for a prestressed tensioning table;

[0012] Includes the anchor box body and clamping components;

[0013] The anchor box body has several anchoring through holes for anchor rods to pass through. The anchor box body has at least one clamping chamber inside, which is connected to the several anchoring through holes. The anchor box body also has two sliding grooves, which are located on the left and right sides of the clamping chamber respectively.

[0014] The clamping assembly includes at least one clamping plate, which corresponds one-to-one with the clamping chamber of the anchor box body. The clamping plate extends into the corresponding clamping chamber and can reciprocate within the clamping chamber. The clamping plate has several clamping slots, the width of which is greater than the diameter of the anchor rod. The wall of the clamping slot can contact the anchor rod that extends into the anchoring hole. Guide sliders are fixedly connected to the left and right sides of the clamping plate, and the guide sliders cooperate with the corresponding sliding grooves of the anchor box body.

[0015] Based on the above technical solution, the present invention can be further improved as follows.

[0016] Furthermore, the clamping assembly also includes two return springs, which correspond one-to-one with two slide grooves, and the return springs are placed at the ends of the slide grooves.

[0017] Furthermore, the anchor box body has two clamping chambers inside, namely the first clamping chamber and the second clamping chamber. The first clamping chamber and the second clamping chamber are arranged in parallel. The middle of the slide is provided with a bend, and the slide passes through the first clamping chamber and the second clamping chamber in sequence.

[0018] The clamping assembly includes several steel balls and two clamping plates, namely a first clamping plate and a second clamping plate. The first clamping plate and the second clamping plate respectively cooperate with the first clamping chamber and the second clamping chamber of the anchor box body. A first guide slider is fixedly connected to the left and right sides of the first clamping plate, and a second guide slider is fixedly connected to the left and right sides of the second clamping plate. Both the first guide slider and the second guide slider cooperate with a groove. The diameter of the groove matches the diameter of the steel ball, and the groove between the first guide slider and the second guide slider is filled with steel balls.

[0019] Furthermore, the first clamping chamber penetrates the lower end face of the anchor box body, and several legs are fixedly connected to the lower end face of the first clamping plate. The legs can extend from the lower end face of the first clamping chamber to the lower side of the anchor box body.

[0020] Furthermore, an assembly slot is provided on the lower end face of the anchor box body, which is connected to the second clamping chamber and the sliding grooves on both sides. An assembly plate is provided in the assembly slot of the anchor box body, which closes the lower side of the second clamping chamber and the lower side of the sliding grooves on both sides.

[0021] Furthermore, several first arc-shaped clamping plates are fixedly connected to the lower side wall of the clamping groove of the first clamping plate at the position corresponding to the anchoring through hole.

[0022] Furthermore, several second arc-shaped clamping plates are fixedly connected to the upper side wall of the clamping groove of the second clamping plate at the position corresponding to the anchoring through hole.

[0023] Before tensioning, the anchor rod is passed through the anchoring through hole and the clamping through groove. The anchor box body moves down under its own weight, and the legs contact the platform. The first clamping plate stops moving down. The anchor box body continues to move down, and the steel balls roll along the curved section of the slide groove, pushing the second clamping plate up. The second arc-shaped clamping plate fits against the upper side wall of the anchor rod, and the first arc-shaped clamping plate fits against the lower side wall of the anchor rod, achieving "clamping" self-locking.

[0024] After tensioning is completed, when it is time to release the tension, use a pry bar to lift the two legs upwards, the first clamping plate moves up, the return spring pushes the second clamping plate down, the steel balls roll in the opposite direction, the clamping through groove and the anchoring through hole are re-aligned, and the anchor rod can be freely pulled out to complete the release of tension.

[0025] The beneficial effects of the dedicated anchor box device for the prestressed tensioning table of this prestressed method are:

[0026] (1) By utilizing the weight of the anchor bolt and anchor box, the first clamping plate moves down, and the second clamping plate is forced to move up by the rolling of steel balls, thus achieving "clamping" self-locking. No hydraulic pressure or wedge cone surface is required, completely eliminating the risk of slippage and breakage of the wire.

[0027] (2) The anchor bolt only needs to pass through the anchoring groove, and the anchor box can be automatically clamped when it is lowered; when releasing tension, simply lift the support leg upwards, and the reset spring can push the clamping plate to loosen, achieving "lifting and releasing", which greatly shortens the operation time.

[0028] (3) Multiple anchoring holes can be arranged in the same anchor box to meet the synchronous tensioning requirements of multiple steel strands on the long line platform and improve production efficiency.

[0029] (4) Maintenance-free, with enclosed chute, increasing service life, no need for lubrication, suitable for high-frequency operation in prefabrication plants. Attached Figure Description

[0030] Figure 1 This is a perspective view of an embodiment of the special anchor box device for the prestressed tensioning table of this method.

[0031] Figure 2 This is a top view of an embodiment of the dedicated anchor box device for the prestressed tensioning table of this method.

[0032] Figure 3 yes Figure 2 Sectional view along AA.

[0033] Figure 4 yes Figure 2 Sectional view along BB direction.

[0034] Figure 5 yes Figure 2 Sectional view along the CC direction.

[0035] Figure 6 This is a perspective view of the anchor box body in an embodiment of the special anchor box device for the prestressed tensioning table of this method.

[0036] Figure 7 This is a perspective view of the first clamping plate in an embodiment of the special anchor box device for the prestressed tensioning table.

[0037] Figure 8 This is a perspective view of the second clamping plate in an embodiment of the special anchor box device for the prestressed tensioning table of this method.

[0038] Explanation of the labels in the diagram:

[0039] Anchor box body - 100; Anchoring through hole - 110; First clamping chamber - 120; Second clamping chamber - 130; Slide groove - 140; Assembly slot - 150; Assembly plate - 160; First clamping plate - 210; First arc-shaped clamping plate - 211; First guide slider - 212; Support leg - 213; Second clamping plate - 220; Second arc-shaped clamping plate - 221; Second guide slider - 222; Return spring - 230; Steel ball - 240; Anchor rod - 300. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Please see Figures 1 to 8 .

[0044] The special anchor box device for the prestressed tensioning table of this prestressed method includes the anchor box body 100 and the clamping assembly.

[0045] The anchor box body 100 is generally rectangular in shape. The anchor box body 100 has several anchoring through holes 110 for anchor rods 300 to pass through. The anchoring through holes 110 pass through the front and rear end faces of the anchor box body 100. The anchor box body 100 has two clamping chambers inside. The two clamping chambers are the first clamping chamber 120 and the second clamping chamber 130. The first clamping chamber 120 and the second clamping chamber 130 are arranged in parallel. The axis of the anchoring through holes 110 is the normal to the end face of the first clamping chamber 120 and the second clamping chamber 130. The first clamping chamber 120 and the second clamping chamber 130 communicate with the several anchoring through holes 110. The first clamping chamber 120 passes through the lower end face of the anchor box body 100.

[0046] The anchor box body 100 also has two sliding grooves 140, which are located on the left and right sides of the first clamping chamber 120 and the second clamping chamber 130 respectively. The middle of the sliding groove 140 is provided with a bend, and the sliding groove 140 passes through the first clamping chamber 120 and the second clamping chamber 130 in sequence.

[0047] An assembly slot 150 is provided on the lower end face of the anchor box body 100. The assembly slot 150 communicates with the second clamping chamber 130 and the two side slides 140. An assembly plate 160 is provided in the assembly slot 150 of the anchor box body 100. The assembly plate 160 closes the lower side of the second clamping chamber 130 and the lower side of the two side slides 140.

[0048] The clamping assembly includes several steel balls 240, two return springs 230, and two clamping plates.

[0049] The two clamping plates are a first clamping plate 210 and a second clamping plate 220. The first clamping plate 210 and the second clamping plate 220 correspond one-to-one with the first clamping chamber 120 and the second clamping chamber 130 of the anchor box body 100. The first clamping plate 210 and the second clamping plate 220 cooperate with the first clamping chamber 120 and the second clamping chamber 130 of the anchor box body 100, respectively. Either the first clamping plate 210 or the second clamping plate 220 can be used in the first clamping chamber 120. The first clamping plate 210 and the second clamping plate 220 each have several clamping slots, the width of which is greater than the diameter of the anchor rod 300. Several first arc-shaped clamping plates 211 are welded and fixed to the lower wall of the clamping slot of the first clamping plate 210 corresponding to the anchoring through hole 110. Several second arc-shaped clamping plates 221 are welded and fixed to the upper wall of the clamping slot of the second clamping plate 220 corresponding to the anchoring through hole 110. The first arc-shaped clamping plates 211 of the first clamping plate 210 and the second arc-shaped clamping plates 221 of the second clamping plate 220 can contact the anchor rod 300 extending into the anchoring through hole 110.

[0050] First guide sliders 212 are welded and fixed to the left and right sides of the first clamping plate 210, and second guide sliders 222 are welded and fixed to the left and right sides of the second clamping plate 220. The first guide sliders 212 and the second guide sliders 222 are both engaged with the slide grooves 140. The diameter of the slide grooves 140 matches the diameter of the steel balls 240, and the space between the first guide sliders 212 and the second guide sliders 222 is filled with steel balls 240. Two return springs 230 correspond one-to-one with the two slide grooves 140. The return springs 230 are placed at the ends of the slide grooves 140. The upper end of the return springs 230 abuts against the lower end surface of the second clamping plate 220, and the lower end of the return springs 230 abuts against the assembly plate 160.

[0051] Two support legs 213 are welded and fixed to the lower end face of the first clamping plate 210. The support legs 213 can extend from the lower end face of the first clamping chamber 120 to the lower side of the anchor box body 100.

[0052] Before the precast anchor beam is poured, the anchor rod 300 needs to be fixed to the anchor box at the end of the prestressed tensioning table. The anchor rod 300 passes through the anchor box body 100, the first clamping plate 210 and the second clamping plate 220. Under the gravity of the anchor box and the anchor rod 300, the first clamping plate 210 extends into the first clamping chamber 120. The first arc-shaped clamping plate 211 of the first clamping plate 210 abuts against the lower side wall of the corresponding anchor rod 300. The first guide slider 212 fixed on the first clamping plate 210 pushes the second clamping plate 220 downward through the steel ball 240 in the groove 140. The second arc-shaped clamping plate 221 of the second clamping plate 220 abuts against the upper side wall of the corresponding anchor rod 300. The first clamping plate 210 and the second clamping plate 220 together clamp the anchor rod 300, providing additional clamping force for the anchor rod 300 and reducing the safety hazards of the precast anchor beam pouring operation.

[0053] 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 special anchor box device for a prestressed tensioning table, characterized in that: Includes the anchor box body (100) and the clamping assembly; The anchor box body (100) has several anchoring through holes (110) for anchor rods (300) to pass through. The anchor box body (100) has at least one clamping chamber inside, which is connected to several anchoring through holes (110). The anchor box body (100) also has two sliding grooves (140), which are located on the left and right sides of the clamping chamber respectively. The clamping assembly includes at least one clamping plate, which corresponds one-to-one with the clamping chamber of the anchor box body (100). The clamping plate extends into the corresponding clamping chamber and can reciprocate within the clamping chamber. The clamping plate has several clamping slots, the width of which is greater than the diameter of the anchor rod (300). The wall of the clamping slot can contact the anchor rod (300) that extends into the anchoring through hole (110). Guide sliders are fixedly connected to the left and right sides of the clamping plate, and the guide sliders cooperate with the corresponding sliding grooves (140) of the anchor box body (100).

2. The special anchor box device for the prestressed tensioning table according to claim 1, characterized in that: The clamping assembly also includes two return springs (230), which correspond one-to-one with two slides (140), and the return springs (230) are placed at the ends of the slides (140).

3. The special anchor box device for the prestressed tensioning table according to claim 1, characterized in that: The anchor box body (100) has two clamping chambers inside, namely the first clamping chamber (120) and the second clamping chamber (130). The first clamping chamber (120) and the second clamping chamber (130) are arranged in parallel. The slide (140) has a bend in the middle and the slide (140) passes through the first clamping chamber (120) and the second clamping chamber (130) in sequence. The clamping assembly includes several steel balls (240) and two clamping plates, namely a first clamping plate (210) and a second clamping plate (220). The first clamping plate (210) and the second clamping plate (220) respectively cooperate with the first clamping chamber (120) and the second clamping chamber (130) of the anchor box body (100). The first clamping plate (210) is fixedly connected to the left and right sides of the first clamping plate (212), and the second clamping plate (220) is fixedly connected to the left and right sides of the second clamping plate (220). The first guide slider (212) and the second guide slider (222) both cooperate with the slide groove (140). The diameter of the slide groove (140) matches the diameter of the steel balls (240), and the slide groove (140) between the first guide slider (212) and the second guide slider (222) is filled with steel balls (240).

4. The special anchor box device for the prestressed tensioning table according to claim 3, characterized in that: The first clamping chamber (120) penetrates the lower end face of the anchor box body (100), and a number of legs (213) are fixedly connected to the lower end face of the first clamping plate (210). The legs (213) can extend from the lower end face of the first clamping chamber (120) to the lower side of the anchor box body (100).

5. The special anchor box device for the prestressed tensioning table according to claim 3, characterized in that: An assembly slot (150) is opened on the lower end face of the anchor box body (100). The assembly slot (150) is connected to the second clamping chamber (130) and the two side slides (140). An assembly plate (160) is provided in the assembly slot (150) of the anchor box body (100). The assembly plate (160) closes the lower side of the second clamping chamber (130) and the lower side of the two side slides (140).

6. The special anchor box device for the prestressed tensioning table according to claim 3, characterized in that: A number of first arc-shaped clamping plates (211) are fixedly connected to the lower side wall of the clamping groove of the first clamping plate (210) at the position corresponding to the anchoring through hole (110).

7. The special anchor box device for the prestressed tensioning table according to claim 3, characterized in that: The upper side wall of the clamping groove of the second clamping plate (220) is fixedly connected with several second arc-shaped clamping plates (221) at the position corresponding to the anchoring through hole (110).

Images