Tensioning equipment for bridge construction

Abstract

Tensioning equipment for bridge construction comprises a first clamping ring arranged on the outer wall of a steel strand, and a second clamping ring arranged on the outer wall of the steel strand, the supporting ring is arranged behind the first clamping ring; the second clamping ring is arranged behind the supporting ring; the slip mechanism is arranged behind the second clamping ring, and the steel strand penetrates through the slip mechanism; the slip mechanism is slidably connected to the rail shell, and a first support is arranged below the rail shell. The telescopic mechanism is arranged behind the track shell and comprises a telescopic end, a fixed end and a connecting rod, the connecting rod is in threaded connection with the front end of the telescopic end, the front end of the connecting rod is arranged in front of the first clamping ring, and a positioning piece is arranged at the front end of the connecting rod; the second support is connected with the fixed end; the counter-force mechanism is arranged on the side wall of the second support, and the front end of the counter-force mechanism is attached to the bridge. During installation, a distance exists between the front end of the track shell and the device, the distance can be adjusted at will, after the steel strand is tensioned, the steel strand in front of the track shell can be directly cut off, then the connecting rod is screwed out, and all parts can be rapidly disassembled.

Description

TECHNICAL FIELD

[0001] The utility model relates to prestressed construction technical field more specifically, especially, it relates to a tensioning equipment of bridge construction. BACKGROUND

[0002] Bridge tensioning construction refers to the tension of the prestressed reinforcement of the prestressed bridge, and the anchoring after the tension to the specified value. The prestressed tension is to add the tension in the component in advance, so that the prestressed tension component subjected to the tensile stress, and then make it produce certain deformation to cope with the load of the steel structure itself, including the load of the roof itself weight, wind load, snow load, earthquake load and so on.

[0003] The existing tensioning equipment is combined with the bridge after tensioning, and the rear end of the clamp, the gasket and the jack are unloaded in sequence to cut the steel strand when cutting the steel strand, so the current efficiency is relatively low. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a tensioning equipment of bridge construction that can cut the steel strand quickly after tensioning to overcome the above-mentioned shortcomings.

[0005] A tensioning equipment of bridge construction, comprising: a first clasp ring arranged on the outer wall of the steel strand, a limiting piece is arranged in the first clasp ring; a supporting ring arranged behind the first clasp ring; a second clasp ring arranged behind the supporting ring; a slip bowl mechanism arranged behind the second clasp ring, the steel strand penetrates through the slip bowl mechanism; the slip bowl mechanism is slidingly connected to the track shell, a first support is arranged below the track shell; a telescopic mechanism arranged behind the track shell, the telescopic mechanism comprises a telescopic end, a fixed end and a connecting rod, the connecting rod is screwed to the front end of the telescopic end, the front end of the connecting rod is arranged in front of the first clasp ring, and the front end of the connecting rod is a limiting piece; a second support connected with the fixed end; a counterforce mechanism arranged on the side wall of the second support, and the front end of the counterforce mechanism is combined with the bridge.

[0006] Further, a plurality of first grooves are arranged in the inner annular array of the first clasp ring, the first grooves are slidingly connected with the outer side of the steel strand, and the limiting piece is arranged between adjacent first grooves.

[0007] Further, a second groove is arranged on the outer side of the supporting ring, the second groove is slidingly connected with the inner side of the steel strand, a through hole is arranged in the middle part of the supporting ring, and the connecting rod penetrates through the through hole.

[0008] Further, a third groove is arranged on the second clasp ring, and the diameter of the third groove is greater than that of the first groove.

[0009] Further, the slip mechanism comprises a center ring, slip rings and a slide rod, the slip rings are annularly arranged on the periphery of the center ring, and the slide rod is arranged between two adjacent slip rings and fixed to the center ring at one end.

[0010] Further, the slip ring is in the shape of a circular truncated cone as a whole, the front end of the slip ring is provided with a notch, the diameter of the small end surface of the slip ring is smaller than the diameter of the third groove, the diameter of the large end surface of the slip ring is larger than the diameter of the third groove, and the steel strand penetrates through the slip ring.

[0011] Further, the inside of the track shell is provided with a slide way, and the slide rod is slidingly connected to the slide way.

[0012] Further, the front end of the telescopic end is provided with a thread, and the rear end of the positioning sheet is in contact with the limiting sheet.

[0013] Further, the first support and the second support are provided with a connecting sheet arranged at the supporting legs of the first support and the second support, a limiting pin is arranged to penetrate through the connecting sheet, and the limiting pin is detachably connected to the first support or the second support.

[0014] Further, the counterforce mechanism comprises an extension rod and a counterforce column, the extension rod is arranged on both sides of the second support, and the counterforce column is screwed to the extension rod.

[0015] Compared with the prior art, the device has the following beneficial effects:

[0016] ①When the device is installed, the front end of the track shell is away from the device by a distance, the distance can be adjusted at will, after the steel strand is tensioned, the steel strand in front of the track shell can be directly cut off, then the connecting rod is screwed out, and thus each part can be quickly disassembled, and the time for disassembling each part is saved.

[0017] ②When the device is installed, the counterforce column is moved forward by rotating the counterforce column, so that the front end of the counterforce column is attached to the side wall of the bridge box body, thereby limiting the forward movement of the counterforce column and the second support during the tensioning operation, and ensuring that the pulling force of the telescopic mechanism is sufficient. DETAILED DESCRIPTION

[0018] The accompanying drawings are used to provide a further understanding of the device, and constitute a part of the specification, and are used to explain the device together with embodiments of the device, and do not constitute a limitation on the device. In the drawings:

[0019] Figure 1 It is a whole structure schematic view of a tensioning equipment for bridge construction.

[0020] Figure 2 It is a schematic view of part of the tensioning equipment for bridge construction.

[0021] Figure 3 This is a schematic diagram of the telescopic mechanism in a tensioning device used in bridge construction.

[0022] In the diagram: 1. First retaining ring; 11. Limiting piece; 12. First groove; 2. Support ring; 21. Second groove; 3. Second retaining ring; 31. Third groove; 4. Slip mechanism; 41. Center ring; 42. Slip ring; 43. Slide rod; 5. Track housing; 51. First support; 52. Slide rail; 6. Telescopic mechanism; 61. Telescopic end; 62. Fixed end; 63. Connecting rod; 631. Positioning piece; 7. Second support; 71. Connecting piece; 72. Limiting pin; 8. Reaction mechanism; 81. Extension rod; 82. Reaction column. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, a tensioning device for bridge construction includes: a first retaining ring 1 disposed on the outer wall of a steel strand, the first retaining ring 1 having a limiting piece 11 therein; a support ring 2 disposed behind the first retaining ring 1; a second retaining ring 3 disposed behind the support ring 2; a retaining mechanism 4 disposed behind the second retaining ring 3, the steel strand passing through the retaining mechanism 4; the retaining mechanism 4 being slidably connected to a track shell 5, the track shell 5 having a first support 51 below it; a telescopic mechanism 6 disposed behind the track shell 5, the telescopic mechanism 6 including a telescopic end 61, a fixed end 62 and a connecting rod 63, the connecting rod 63 being screwed to the front end of the telescopic end 61, the front end of the connecting rod 63 being located in front of the first retaining ring 1, the front end of the connecting rod 63 being a positioning piece 631; a second support 7 connected to the fixed end 62; and a reaction mechanism 8 disposed on the side wall of the second support 7, the front end of the reaction mechanism 8 being in contact with the bridge.

[0025] Before using this device, connect the clamps and anchors to the part of the steel strand that contacts the bridge to prevent the steel strand from retracting after being stretched. Connect the steel strands outside the bridge to this device.

[0026] like Figure 2 As shown, the first retaining ring 1 has a plurality of first grooves 12 arranged in an annular array. The opening of the first groove 12 faces the center. The first groove 12 is slidably connected to the outer side of the steel strand. The curvature of the first groove 12 is the same as the curvature of the outer wall of the steel strand. The first retaining ring 1 restricts the steel strand from spreading outward. The limiting piece 11 is provided between adjacent first grooves 12. There is a gap between the ends of each limiting piece 11. The connecting rod 63 passes through the gap.

[0027] The diameter of the support ring 2 is smaller than that of the first clamping ring 1, the outer side of the support ring 2 is provided with a second groove 21, the second groove 21 faces outward, the second groove 21 is in sliding connection with the inner side of the steel strand, the second groove 21 supports the upper steel strand, the second groove 21 and the first groove 12 cooperate to separate the steel strands, so that the multiple steel strands are separated from each other, preventing mutual influence between the steel strands during tensioning, and the limiting piece 11 limits the sliding of the support ring 2 into the first clamping ring 1. The middle part of the support ring 2 is provided with a through hole, and the connecting rod 63 penetrates through the through hole.

[0028] The second clamping ring 3 is provided with a third groove 31, the diameter of the third groove 31 is greater than that of the first groove 12, and the support ring 2 can slide into the second clamping ring 3.

[0029] The slip mechanism 4 includes a center ring 41, a slip ring 42, and a slide rod 43, the slip ring 42 is arranged in an annular array around the periphery of the center ring 41, one end of the slide rod 43 is arranged between two adjacent slip rings 42, the other end of the slide rod 43 is fixedly connected to the center ring 41, and the connecting rod 63 penetrates through the center ring 41.

[0030] The slip ring 42 is in the shape of a circular truncated cone as a whole, the front end of the slip ring 42 is provided with a notch, the small end face of the slip ring 42 has a diameter smaller than that of the third groove 31, the large end face of the slip ring 42 has a diameter greater than that of the third groove 31, and the steel strand penetrates through the slip ring 42. After being extruded, the front end of the slip ring 42 contracts inward, thereby clamping the steel strand.

[0031] The inside of the track shell 5 is provided with a slide 52, the slide rod 43 is in sliding connection with the slide 52, the slide 52 limits the horizontal movement of the slide rod 43, preventing the steel strand from being twisted when the center ring 41 rotates, and at the same time, the movement and tensioning distance of the steel strand can be observed at the slide 52.

[0032] As shown in Figure 3 The front end of the telescopic end 61 is provided with a threaded section, the rear end of the connecting rod 63 is screwed into the threaded section of the telescopic end 61, so that the connecting rod 63 and the telescopic end 61 move forward and backward together, the rear end of the positioning piece 631 is in contact with the limiting piece 11, the limiting piece 11 limits the rearward movement of the positioning piece 631, and when the connecting rod 63 drives the positioning piece 631 to move backward, the positioning piece 631 pulls the limiting piece 11 to move backward together.

[0033] In the installation, the connecting rod 63 is first inserted through the first clasp 1, then the first clasp 1 is inserted through the steel strand, then the support ring 2 is inserted through the steel strand, the support ring 2 and the first clasp 1 cooperate to separate the plurality of steel strands, then the second clasp 3 is inserted, the slip ring 42 is inserted at the gap between the second clasp 3, the support ring 2 and the steel strand, the steel strand is inserted through the slip ring 42, then the slip ring 42 is pushed forward to make the front end of the slip ring 42 shrink and clamp the steel strand, then the slide rod 43 is inserted into the slide 52, and the rear end of the connecting rod 63 is connected with the telescopic end 61, so that the steel strand of the bridge is assembled with the device.

[0034] In the tensioning, the telescopic end 61 is retracted to make the first clasp 1, the support ring 2 and the second clasp 3 move backward, so that the slip ring 42 has a greater clamping force on the steel strand, and further drives the steel strand to move backward to complete the tensioning.

[0035] In the installation, the front end of the track shell 5 has a distance from the device, which can be adjusted arbitrarily, when the tensioning of the steel strand is completed, the steel strand in front of the track shell 5 can be directly cut off, then the connecting rod 63 is screwed out, so that each part can be quickly disassembled, saving the time of disassembling each part.

[0036] In order to increase the stability of the device during tensioning operation, the connecting piece 71 is arranged between the first support 51 and the second support 7, the connecting piece 71 is arranged at the leg of the first support 51 and the second support 7, the limiting pin 72 is arranged through the connecting piece 71, and the limiting pin 72 is detachably connected to the first support 51 or the second support 7. When the first support 51 and the second support 7 are connected, the connecting piece 71 is attached to the rear leg of the first support 51 and the front leg of the second support 7, then a plurality of limiting pins 72 are inserted, the limiting pins 72 are arranged through the first support 51 and the second support 7 respectively, so that the first support 51 and the second support 7 move synchronously.

[0037] The fixed end 62 of the steel strand and the second support 7 will be subjected to a forward pulling force during tensioning of the steel strand, and the counterforce mechanism 8 is used to support the bridge to prevent the second support 7 from moving forward. The counterforce mechanism 8 includes the extension rod 81 and the counterforce column 82, the extension rod 81 is arranged on both sides of the second support 7, and the counterforce column 82 is screwed on the extension rod 81. In the installation of the device, the counterforce column 82 is moved forward by rotating the counterforce column 82, so that the front end of the counterforce column 82 is attached to the side wall of the bridge box, thereby limiting the forward movement of the counterforce column 82 and the second support 7 during tensioning operation, and ensuring that the pulling force of the telescopic mechanism 6 is sufficient.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A tensioning apparatus for bridge construction, characterized by, The utility model relates to a steel strand fixing device for bridge construction, which comprises the following components: a first clamping ring (1) arranged on the outer wall of the steel strand, wherein a limiting piece (11) is arranged in the first clamping ring (1); a supporting ring (2) arranged behind the first clamping ring (1); a second clamping ring (3) arranged behind the supporting ring (2); a slip mechanism (4) arranged behind the second clamping ring (3), wherein the steel strand penetrates through the slip mechanism (4); the slip mechanism (4) is slidingly connected to a track shell (5), and a first support (51) is arranged below the track shell (5); a telescopic mechanism (6) arranged behind the track shell (5), wherein the telescopic mechanism (6) comprises a telescopic end (61), a fixed end (62), and a connecting rod (63), the connecting rod (63) is screwed to the front end of the telescopic end (61), the front end of the connecting rod (63) is arranged in front of the first clamping ring (1), and the front end of the connecting rod (63) is a positioning piece (631); a second support (7) connected to the fixed end (62); a counterforce mechanism (8) arranged on the side wall of the second support (7), wherein the front end of the counterforce mechanism (8) is attached to the bridge.

2. The tensioning device for bridge construction according to claim 1, characterized in that: a plurality of first grooves (12) are arranged in the inner ring of the first clamping ring (1), the first grooves (12) are slidingly connected to the outer side of the steel strand, and the limiting piece (11) is arranged between adjacent first grooves (12).

3. The tensioning apparatus for bridge construction of claim 2, wherein: a second groove (21) is arranged on the outer side of the supporting ring (2), the second groove (21) is slidingly connected to the inner side of the steel strand, a through hole is arranged in the middle of the supporting ring (2), and the connecting rod (63) penetrates through the through hole.

4. The tensioning apparatus for bridge construction of claim 3, wherein: a third groove (31) is arranged on the second clamping ring (3), and the diameter of the third groove (31) is greater than the diameter of the first groove (12).

5. The tensioning apparatus for bridge construction according to claim 4, characterized in that: the slip mechanism (4) comprises a center ring (41), a slip ring (42), and a sliding rod (43), the slip rings (42) are arranged in an annular array around the periphery of the center ring (41), and the sliding rod (43) is arranged between two adjacent slip rings (42), one end of the sliding rod (43) being fixedly connected to the center ring (41).

6. The tensioning apparatus for bridge construction of claim 5, wherein: the slip ring (42) is in the shape of a circular truncated cone as a whole, a notch is arranged at the front end of the slip ring (42), the diameter of the small end surface of the slip ring (42) is smaller than the diameter of the third groove (31), the diameter of the large end surface of the slip ring (42) is greater than the diameter of the third groove (31), and the steel strand penetrates through the slip ring (42).

7. The tensioning apparatus for bridge construction of claim 6, wherein: a slide (52) is arranged inside the track shell (5), and the sliding rod (43) is slidingly connected to the slide (52).

8. The tensioning apparatus for bridge construction of claim 7, wherein: the front end of the telescopic end (61) is provided with a thread, and the rear end of the positioning piece (631) is in contact with the limiting piece (11).

9. The tensioning apparatus for bridge construction of claim 8, wherein: a connecting piece (71) is arranged between the first support (51) and the second support (7), the connecting piece (71) is arranged at the supporting leg of the first support (51) and the second support (7), a limiting pin (72) penetrates through the connecting piece (71), and the limiting pin (72) is detachably connected to the first support (51) or the second support (7).

10. The tensioning apparatus for bridge construction of claim 9, wherein: The counterforce mechanism (8) comprises extension rods (81) arranged on both sides of the second support (7) and counterforce columns (82) screwed to the extension rods (81).

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