CN218540418U

CN218540418U - Prestressed steel strand releasing and tensioning device

Info

Publication number: CN218540418U
Application number: CN202222640087.1U
Authority: CN
Inventors: 苏玉伟
Original assignee: Tianjin Ruitong Prestressed Steel Strand Co ltd
Current assignee: Tianjin Ruitong Prestressed Steel Strand Co ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-02-28
Anticipated expiration: 2032-10-09

Abstract

The utility model belongs to the technical field of steel strands, in particular to a prestressed steel strand releasing and tensioning device, which comprises a first anchor ring, an anchorage device clamping piece, a hydraulic jack, a second anchor ring and a gasket ring; the second anchor ring comprises an inner layer block and an outer layer block distributed on the periphery of the inner layer block, the inner layer block and the outer layer block are spliced with each other to form a tapered hole, and clamps are arranged on the outer sides of the inner layer block and the outer layer block and used for fixing the inner layer block and the outer layer block; the utility model discloses a but set up the anchorage device clamping piece of split, when needs demolish the ground tackle clamping piece on the anchorage device, then can directly demolish the clamp on the anchorage device, demolish and scatter each other between back inlayer piece, the outer piece, then the ground tackle clamping piece directly exposes, need not prize out one by one with the screwdriver, reaches the effect of demolising the ground tackle clamping piece fast, is particularly useful for the more condition of steel strand wires strand number.

Description

Prestressed steel strand releasing and tensioning device

Technical Field

The utility model belongs to the technical field of the steel strand wires, concretely relates to prestressing force steel strand wires are put and are opened device.

Background

The pretensioning method prefabricated hollow slab is widely applied to the construction of highway bridge engineering due to the characteristics of small dead weight, convenient transportation, strong applicability, high assembly degree and the like, the tensioning and releasing of prestressed steel strands are used as important links of the construction of the prefabricated hollow slab, and are also important factors of high bearing capacity of the hollow slab.

Because the unique mechanical properties of steel strand wires make it inevitable take place the disconnected silk phenomenon at the tensioning process, the anchor backing plate condition such as breaking also can appear in addition, when meetting such phenomenon, all need put the steel strand wires that have stretched and open the back and change steel strand wires again or install the anchor backing plate, in the actual operation most utilize the manual work to use the screwdriver to prize out the ground tackle clamping piece one by one, because the comparatively intensive partial ground tackle clamping piece of steel strand wires is hardly pried out.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prestressing force steel strand wires puts a device to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a prestressed steel strand pay-off device comprises: the first anchor ring comprises a conical hole for the steel strand monofilament to pass through and can be sleeved on the outer side of the steel strand; the anchorage device clamping piece is clamped and sleeved on the outer side of the steel strand monofilament and is clamped in the conical hole; the hydraulic jack is arranged on the outer side of the steel strand; the second anchor ring is arranged on the other side of the hydraulic jack and sleeved on the outer side of the steel strand; the gasket is arranged between the first anchor ring and the hydraulic jack; wherein, the second anchorage circle includes the inlayer piece and distributes the outer piece of inlayer piece week side, splice each other between inlayer piece, the outer piece and form the bell mouth, the outside of inlayer piece, outer piece is equipped with the clamp, be used for with inlayer piece, outer piece are fixed.

Preferably, the inner layer block comprises more than three first arc-shaped blocks which are distributed in central symmetry, and each first arc-shaped block is provided with a first groove corresponding to the conical hole.

Preferably, the outer layer block comprises more than three second arc-shaped blocks which are distributed in central symmetry, and each second arc-shaped block is provided with a second groove corresponding to the conical hole.

Preferably, the first groove and/or the second groove can be spliced to form the tapered hole.

Preferably, the outer side wall of the outer layer block is provided with a step groove, and the clamp is installed in the step groove.

Preferably, the hoop is provided with a bolt piece, so that the inner layer block and the outer layer block are radially tightened.

Preferably, the hydraulic jack is fixedly provided with a handle and a hydraulic interface, and the hydraulic interface is connected with an external oil pump.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a but set up the anchor ring of split, when the ground tackle clamping piece on the anchor ring is demolishd to needs, then can directly demolish the clamp on the anchor ring, demolish between back inlayer piece, the outer piece and scatter each other, then ground tackle clamping piece directly exposes, need not prize out one by one with the screwdriver, reaches the effect of demolising the ground tackle clamping piece fast, is particularly useful for the more condition of steel strand wires strand number.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the installation state of the present invention;

fig. 3 is a schematic structural view of the stretching state of the present invention;

fig. 4 is a schematic side view of a second anchorage member of the present invention;

fig. 5 is a schematic side sectional view of a second anchor ring according to the present invention;

fig. 6 is a schematic view of a partial three-dimensional structure of a second anchor ring according to the present invention;

fig. 7 is a schematic view of a partial three-dimensional structure of the center block and the arc block of the present invention.

In the figure: 1. a first anchorage member; 2. a gasket; 3. an anchor clamping piece; 4. a hydraulic jack; 41. a handle; 42. a hydraulic interface; 5. a second anchorage member; 501. a tapered hole; 502. a step groove; 51. an inner layer block; 52. an outer layer block; 53. clamping a hoop; 531. a bolt member.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: a prestressed steel strand releasing and tensioning device comprises a first anchor ring 1, a gasket 2, an anchor device clamping piece 3, a hydraulic jack 4 and a second anchor ring 5 which are sequentially arranged on a steel strand.

The first anchor ring 1 and the second anchor ring 5 respectively comprise an inner layer block 51 and an outer layer block 52 distributed on the peripheral side of the inner layer block 51, and the inner layer block 51 and the outer layer block 52 are spliced with each other to form a tapered hole 501, so that the steel strand can pass through the tapered hole 501.

Further, the inner layer block 51 comprises more than three first arc-shaped blocks which are distributed in a central symmetry mode, a first groove is formed in the position, corresponding to the tapered hole 501, of each first arc-shaped block, the outer layer block 52 comprises more than three second arc-shaped blocks which are distributed in a central symmetry mode, a second groove is formed in the position, corresponding to the tapered hole 501, of each second arc-shaped block, and the first grooves and/or the second grooves can be spliced to form the tapered hole 501.

In a specific embodiment, for example, where the steel strand comprises seven strands of monofilament, the inner layer blocks 51 and the outer layer blocks 52 are each provided in three and are distributed in a staggered manner in the circumferential direction.

Further, in order to be able to be fixed by a limit after the inner block 51 and the outer block 52 are joined, a clip 53 is provided on the outer sides of the inner block 51 and the outer block 52 to fix the inner block 51 and the outer block 52.

Furthermore, in order to prevent the clamp 53 from falling off from the outer layer block 52, a step groove 502 is formed in the outer side wall of the outer layer block 52, and the clamp 53 is installed in the step groove 502, so that the installation stability of the clamp 53 can be ensured.

Specifically, the hoop 53 is made of a steel belt, the thickness of the hoop 53 is 2-3 mm, the hoop 53 is provided with a bolt member 531, the inner layer block 51 and the outer layer block 52 are radially tightened, the bolt member 531 is matched with bolts and nuts, the hoop 53 can be clamped outside the outer layer block 52 in a tight mode, and the effect that the inner layer block 51 and the outer layer block 52 are mutually compressed and fixed is achieved.

Furthermore, in order to increase the friction force between the inner layer block 51 and the outer layer block 52 in the axial direction, a convex part and a concave part which are matched with each other to increase the friction force are arranged on the outer wall of the inner layer block 51 and the inner wall of the outer layer block 52, so that the inner layer block 51 and the outer layer block 52 can be prevented from axially sliding with each other when the jack pulls the steel strand in the axial direction.

Furthermore, the anchor clamping piece 3 is clamped outside the steel strand monofilament and clamped in the tapered hole 501, the anchor clamping piece 3 comprises two to four arc-shaped tapered sheets, the rear part of the anchor clamping piece is hooped by a spring ring and can be clamped on the outer wall of the single-stranded steel strand to play the role of anchoring, then the anchor clamping piece is installed in the first anchor ring 1 or the second anchor ring 5, the first anchor ring 1 and the second anchor ring 5 are matched with the anchor clamping piece 3 to anchor a certain position of the steel strand, and the hydraulic jack 4 is tensioned in the aspect.

Furthermore, the hydraulic jack 4 is arranged on the outer side of the steel strand, a handle 41 and a hydraulic interface 42 are fixedly arranged on the hydraulic jack 4, and the hydraulic interface 42 is connected with an external oil pump.

When the steel strand tensioning device is used, a first anchor ring 1 is sleeved on a steel strand in advance, then anchor clamping pieces 3 are installed, the anchor clamping pieces 3 are sequentially installed in each conical hole 501 of the first anchor ring 1, then gaskets 2 and hydraulic jacks 4 are installed, the gaskets 2 are located between the first anchor ring 1 and the hydraulic jacks 4, finally a second anchor ring 5 and anchor clamping pieces 3 are installed, the second anchor ring 5 is tightly attached to the right side of the hydraulic jacks 4, oil is supplied to the hydraulic jacks 4 after the gaskets are completely installed, the hydraulic jacks 4 are extended, the steel strand is tensioned, oil supply to the tensioning hydraulic jacks 4 is stopped after a certain distance is passed, the anchor clamping pieces 3 are self-locked on the first anchor ring 1, then the subsequently installed second anchor ring 5, anchor clamping pieces 3, hydraulic jacks 4 and gasket installing rings 2 are dismantled, finally concrete is poured, and the steel strand is poured into a bridge prefabricated slab and the like.

With the above embodiments, when the anchor clamping pieces 3 on the first anchorage zone 1 or the second anchorage zone 5 need to be removed, the hoops 53 on the first anchorage zone 1 or the second anchorage zone 5 can be directly removed, after removal, the inner layer blocks 51 and the outer layer blocks 52 are mutually scattered, and then the anchor clamping pieces 3 are directly exposed without being pried out one by a screwdriver, so that the effect of quickly removing the anchor clamping pieces 3 is achieved, and the anchor clamping pieces are particularly suitable for the condition that the number of steel strands is large.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a prestressing force steel strand put a device which characterized in that includes:

the first anchor ring (1) comprises a conical hole (501) for the steel strand monofilament to pass through and can be sleeved on the outer side of the steel strand;

the anchorage clamping piece (3) is clamped and sleeved on the outer side of the steel strand monofilament and clamped in the conical hole (501);

the hydraulic jack (4) is arranged on the outer side of the steel strand;

the second anchor ring (5) is arranged on the other side of the hydraulic jack (4) and sleeved on the outer side of the steel strand;

the gasket (2) is arranged between the first anchorage ring (1) and the hydraulic jack (4);

wherein, second anchorage circle (5) include inlayer piece (51) and distribute and be in outer layer piece (52) of inlayer piece (51) week side, splice each other between inlayer piece (51), the outer layer piece (52) and form bell mouth (501), the outside of inlayer piece (51), outer layer piece (52) is equipped with clamp (53), be used for with inlayer piece (51), outer layer piece (52) are fixed.

2. The prestressed steel strand tensioning device according to claim 1, wherein: the inner layer block (51) comprises more than three first arc-shaped blocks which are distributed in a central symmetry mode, and a first groove is formed in the position, corresponding to the tapered hole (501), of each first arc-shaped block.

3. The prestressed steel strand tensioning device according to claim 2, wherein: the outer layer block (52) comprises more than three second arc-shaped blocks which are distributed in a central symmetry mode, and a second groove is formed in the position, corresponding to the tapered hole (501), of each second arc-shaped block.

4. The prestressed steel strand tensioning device according to claim 3, wherein: the first groove and/or the second groove can be spliced to form the tapered hole (501).

5. The prestressed steel strand tensioning device according to claim 1, wherein: a step groove (502) is formed in the outer side wall of the outer layer block (52), and the clamp (53) is installed in the step groove (502).

6. The prestressed steel strand tensioning device according to claim 1, wherein: and the hoop (53) is provided with a bolt piece (531), so that the inner layer block (51) and the outer layer block (52) are radially tightened.

7. The prestressed steel strand tensioning device according to claim 1, wherein: the hydraulic jack (4) is fixedly provided with a handle (41) and a hydraulic interface (42), and the hydraulic interface (42) is connected with an external oil pump.