CN221052995U - Steel strand assembly convenient for bundle penetrating construction in pore canal - Google Patents

Abstract

The utility model relates to a steel strand bundle assembly convenient for bundle penetrating construction in a pore canal, which comprises a steel strand bundle, a fixing ring for tightening the front end of the steel strand bundle, at least one porous fixing plate sleeved on the steel strand bundle, and a heat-shrinkable plastic sleeve for wrapping at least the front end of the steel strand bundle and the fixing ring; wherein, the tightening action of the fixing ring enables at least part of the steel stranded wires to elastically deform. According to the utility model, the front end of the steel strand bundle and the fixed ring are enveloped and fixed by utilizing the heated retraction of the heat-shrinkable plastic sleeve, so that a compact structure is formed, the mutual dislocation and movement of each steel strand in the steel strand bundle and between the steel strands and the fixed ring in the processes of transportation, construction and the like are prevented, the retraction degree of the heat-shrinkable plastic sleeve is adjusted, the outward elastic deformation of the front end of the peripheral steel strand due to the extrusion of the fixed ring is controlled within a certain range, the problem that the deformed and tilted steel strand and the fixed ring are scratched and damaged by duct is reduced, and the whole steel strand bundle assembly is more convenient and accurate in the prestress duct.

Description

Steel strand assembly convenient for bundle penetrating construction in pore canal

Technical Field

The utility model relates to the field of steel strand bundle processing, in particular to a steel strand bundle assembly convenient for bundle penetrating construction in a pore canal.

Background

In building construction of buildings, roads and bridges, a plurality of prestressed steel strands are often required to penetrate into prepared prestressed tunnels. However, in the prior art, after the steel strand is transported to a construction site, a constructor cuts the steel strand according to the required length, and then sequentially passes a single steel strand through the prestressed duct. The following problems exist in the prior art: 1. the steel strands can twist and wind each other when being threaded in the pore canal, after the threading is completed, the steel strands at two ends are difficult to correspond to each other one by one, so that when the prestress anchorage device is installed for tensioning subsequently, the stress among the steel strands is uneven, the prestress data deviation can be caused after the tensioning, and the using effect is affected. 2. Each steel strand in the plurality of steel strands is respectively marked with a digital mark, and corresponding anchorage devices are installed according to the digital mark after the threading is finished, so that the steps are complex, and the efficient construction is not facilitated.

Patent CN103590539B discloses a finished steel strand bundle, the structure of which comprises: the steel strand comprises a steel strand bundle, a marking plate, binding iron wires, binding steel belts and a tractor, wherein the tractor comprises a sleeve, one end of the sleeve is provided with a taper hole, three conical annular clamping pieces with the same structure and the same outer diameter are assembled in the taper hole at one end of the sleeve, and the inner rings of the three clamping pieces are sleeved on the steel strand bundle; one end of the traction head is connected to the internal threaded hole at the other end of the sleeve, and the other end of the traction head is a hanging ring; the outer outline size of the tractor is smaller than the inner diameter of a construction pore canal for threading a finished steel strand bundle after the finished steel strand bundle is pulled. This patent can avoid intertwining between the steel strand wires, and under traction equipment drags, can effectively be safe with the finished steel strand wires pencil wear to send construction duct bellows, wears to send the winding and the deformation between the process can avoid the steel strand wires, and traction effect is good, and the efficiency of construction is high. However, the front end tractor of the steel strand bundle has a complex structure and high cost, and the steel strand bundle is fixed by the strapping steel belt only and is easy to slip.

The utility model patent CN205134744U announces a finished steel strand bundle with built-in hooping ring that can be pushed, said finished steel strand bundle comprising: a plurality of steel strands, a marking plate penetrating through the plurality of steel strands, and a steel wire bundling the plurality of steel strands; also comprises a hooping ring and a thermal shrinkage type threading head. The front end of the finished steel strand bundle is hooped into a whole by adopting the hooping ring, so that the finished steel strand bundle can smoothly pass through the corrugated pipe duct; the appearance of the traction head can smoothly pass through the corrugated pipe duct, and the traction head is suitable for the propelling type construction of the finished steel strand bundle. The utility model simplifies the front end structure and the processing difficulty of the steel strand bundle, but the tightening effect of the tightening ring on the steel strand is insufficient, the steel strand is easy to slip off, and the protection of the marking plate, especially the front marking plate, is insufficient, and in the actual perforation construction, the marking plate is easy to damage and drop after long pushing operation, so that the marking effect is difficult to be displayed.

Therefore, how to provide a steel strand bundle assembly which is convenient to construct by penetrating bundles in a pore canal, is fixed and not slipped, is smooth and not wound by internal steel strands, has wide application range, is convenient to inspect during construction, is stable during transportation and installation, and has low preparation cost is a problem to be solved urgently by technicians in the field.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model aims to provide the steel strand bundle assembly which is convenient for the bundle penetrating construction in the pore canal, and the steel strand bundle assembly has the steel strand bundle front end design with strong overall structure, so that the bundle penetrating construction in the pore canal is convenient, the internal steel strand is smooth and is not wound through the cooperation of the fixing ring and the porous fixing plate, the construction is convenient, and the application range is wide.

In a first aspect, the utility model provides a steel strand assembly for facilitating strand penetration construction in a tunnel, comprising a steel strand, a fixing ring for tightening the front end of the steel strand, at least one porous fixing plate sleeved on the steel strand, and a heat-shrinkable plastic sleeve for wrapping at least the front end of the steel strand and the fixing ring; wherein, the tightening action of the fixing ring enables at least part of the steel stranded wires to elastically deform.

Preferably, the fixing ring is an annular steel pipe, the width is 30-70mm, and the wall thickness is 3-6mm.

Preferably, the distance between the fixing ring and the front end face of the steel strand bundle is 10-60mm.

Preferably, the length of the heat-shrinkable plastic sleeve along the axial direction of the steel strand bundle is 50-300mm.

Preferably, the fixing ring is sleeved at the front end of the steel strand bundle, and external force is applied to squeeze and deform to reduce the inner diameter of the fixing ring, so that the steel strand bundle is hooped, and the ratio of the inner diameter of the fixing ring before being squeezed to the inner diameter of the fixing ring after being squeezed is (1.01-1.06): 1.

Preferably, at least part of the steel strands are elastically deformed to tilt outwards due to the extrusion action of the fixing ring between the front end surface of the steel strand bundle and the fixing ring. The elastic deformation generated by the front end surface of the steel strand bundle increases the tightening effect between the fixing ring and the steel strand bundle; the second aspect plays a role of limiting the fixing ring and prevents the fixing ring from sliding or falling off to the front end surface; in the third aspect, the internal stress of each steel strand at the rear end part of the fixed ring can be reduced, the bending and winding of each steel strand can be prevented, and the stress uniformity of the whole bundle of tensioning can be improved.

Preferably, the outer surface of the retaining ring has at least 2 outwardly directed protrusions formed by the compression action. After the fixed ring is extruded by external force at the front end of the steel strand bundle, for example, a plurality of extrusion blocks of a hydraulic press are symmetrically extruded to form the fixed ring, the inner diameter of a part of the fixed ring corresponding to the extrusion blocks is reduced, but the part of a gap between the extrusion blocks is outwards folded and raised due to inward extrusion at two sides, and the reduced inner diameter of the fixed ring achieves the effect of tightening the steel strand bundle and simultaneously the outer surface of the fixed ring is raised. The outer surface of the fixed ring is provided with a bulge formed by external force extrusion, so that a long opening can be cut along the length direction of the fixed ring by using tools such as an angle grinder and the like when the fixed ring is disassembled, and the fixed ring can be easily taken down. Compared with the common inward-shrinking type fixing ring, the fixing ring adopted by the utility model has the surface bulge height of 1mm-6mm, is easier to disassemble, and can not damage the internal structure of the steel strand bundle during disassembly.

Preferably, the heat shrink plastic sleeve extends from a front face of the steel strand bundle and at least partially encapsulates the steel strand bundle on a rear side of the securing ring. The heat-shrinkable plastic sleeve has enough coating length and extends to the steel strand bundle at the rear side of the fixed ring, so that the outer diameter of the rear side part of the coated fixed ring is smaller than that of the part of the fixed ring coated by the heat-shrinkable plastic sleeve. Through the radial difference, the coating fixity of the heat-shrinkable plastic sleeve can be improved, the heat-shrinkable plastic sleeve is not easy to slip from the steel strand bundle in the transportation and construction, particularly perforation construction processes, and the steel strand bundle and the prestressed duct can be well protected from damage.

Preferably, each threading hole on the porous fixing plate is provided with a number and corresponds to one steel strand, so that each steel strand in the steel strand bundle is arranged smoothly. The fixing plate has a fixing and restraining function on the steel strands, and can also form a numbering and positioning function on each steel strand, so that each threading hole of the front fixing plate and each threading hole of the rear fixing plate correspond to the number of the steel strand bundles one by one, the steel strand bundles can be quickly and accurately installed according to the number on the fixing plate during construction, and the installation errors of the steel strand bundles are prevented from being caused, and the overall engineering quality and efficiency are influenced.

Preferably, a plurality of porous fixing plates are arranged from the front end to the rear end of the steel strand bundle, and the heat-shrinkable plastic sleeve at least encapsulates one porous fixing plate. More preferably, the thickness of the porous fixing plates is gradually increased from the front end to the rear end of the steel strand bundle, the porous fixing plate positioned at the forefront end has lower thickness, for example, less than 1mm, more preferably less than 0.8mm, particularly preferably the porous fixing plate is made of fiber reinforced elastic composite materials, the porous fixing plate is flexible and wear-resistant, can be also encapsulated in a heat-shrinkable plastic sleeve to be better protected, and the number of each steel strand can be clearly calibrated after the heat-shrinkable plastic sleeve is removed after perforation is finished.

Preferably, the steel strand assembly further comprises a steel wire wound around the periphery of the steel strand in the length direction. The whole steel strand wires are twined the constraint, restrict the movable range of steel strand wires, prevent to twine or arouse the side direction to spring open and cause danger.

Compared with the prior art, the utility model has the following advantages:

1. According to the utility model, the number and the position of each steel strand in the steel strand bundle are fixed through the fixing ring at the front part of the steel strand bundle and at least one porous fixing plate at the rear part of the fixing ring, so that no winding occurs in the transportation and construction processes. After the construction is completed, the fixing rings and the fixing plates are removed, the steel strands in the pore canal are kept smooth, the stress uniformity of whole bundle stretching is improved, and the bundle penetrating construction in the pore canal of the steel strand bundle is facilitated.

2. The extrusion force is applied to the front end of the steel strand bundle through the fixing ring, the front end part of the steel strand bundle is elastically deformed when the inner diameter of the fixing ring is reduced and deformed, particularly, the steel strand at the outermost ring of the steel strand bundle is subjected to slightly excessive extrusion, and the shorter free end of the steel strand bundle is subjected to stress reaction opposite to the direction of the application of the force, so that outward tilting deformation occurs.

3. The utility model adopts the heat-shrinkable plastic sleeve, the heat-shrinkable plastic sleeve has heat-shrinkable fixity, the product is wound and encapsulated by virtue of the retractive force of the heat-shrinkable plastic sleeve, a compact unit whole which does not occupy space is formed, the mutual dislocation and movement of the product in the transportation process can be prevented, meanwhile, the retractive degree can be controlled to adjust the gap of the hard steel strand to achieve the effect of tightly attaching each steel strand, and particularly, the problems of cutting and rubbing the front end of the steel strand, the fixing ring and the pore canal which are slightly tilted and elastically deformed can be reduced. And secondly, labels are easily stuck on the surface of the heat-shrinkable plastic sleeve, so that the heat-shrinkable plastic sleeve is convenient for constructors to distinguish. In addition, after the heat-shrinkable plastic sleeve is removed, the thin fixing plate enclosed inside the heat-shrinkable plastic sleeve is provided with numbers corresponding to the steel strands, so that subsequent construction can be immediately performed, and the site construction efficiency is improved. Compared with other coating protective sleeves, the heat-shrinkable plastic sleeve has the advantages of low cost, simple structure, relatively simple coating process and the like.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a front view of a first embodiment steel strand assembly;

FIG. 2 is a left side view of the first embodiment without the shrink wrap encapsulated;

fig. 3 is a front view of a second embodiment steel strand assembly.

Reference numerals illustrate:

1-steel strand bundle, 2-fixing ring, 3-heat shrinkage plastic sleeve, 4-fixing plate, 5-bulge and 6-steel wire.

Detailed Description

The drawings in the embodiments of the present utility model will be combined; the technical scheme in the embodiment is clearly and completely described; it is apparent that the described embodiments are only a few of the embodiments of the present utility model; but not all embodiments, are based on embodiments in the present utility model; all other embodiments obtained by those skilled in the art without undue burden; all falling within the scope of the present utility model.

Referring to fig. 1-3, a steel strand assembly for facilitating in-tunnel strand construction, comprising:

(1) Steel strand 1: the steel strand is formed by bundling a plurality of steel strands, the front end of the steel strand bundle 1 is sleeved with a fixed ring 2, and the front end of the steel strand bundle 1 and the fixed ring 2 are encapsulated with a heat-shrinkable plastic sleeve 3; the rear end is sleeved with a porous fixing plate 4, and each steel strand passes through a corresponding threading hole on the porous fixing plate 4;

between the front end face of the steel strand 1 and the fixing ring 2, at least part of the steel strands are elastically deformed by outward tilting due to the extrusion action of the fixing ring 2.

(2) Fixing ring 2: the fixing ring 2 is an annular steel pipe with the width of 30-70mm and the wall thickness of 3-6mm. The distance between the fixing ring 2 and the front end face of the steel strand bundle 1 is 10-60mm.

The fixed ring 2 is sleeved at the front end of the steel strand bundle 1, and external force is applied to squeeze and deform to reduce the inner diameter of the fixed ring 2, so that the steel strand bundle 1 is hooped, and the ratio of the inner diameters of the fixed ring 2 before being squeezed to after being squeezed is (1.01-1.06): 1.

The outer wall of the fixed ring 2 is extruded by the hydraulic blocks, a plurality of bulges 5 are extruded outwards between the adjacent hydraulic blocks, and the distance from the outer surface of the fixed ring 2 to the tops of the bulges 5 is about 1-6mm. As the bulge 5 is the extrusion stress concentration point, when the follow-up cutting is opened, the follow-up cutting is performed along a certain bulge 5, and the disassembly speed is higher.

(3) A plurality of porous fixing plates 4: each threading hole on the porous fixing plate 4 is provided with a number and corresponds to one steel strand respectively, so that the steel strands in the steel strand bundle 1 are smoothly arranged; a plurality of porous fixing plates 4 are arranged from the front end to the rear end of the steel strand bundle 1, the thickness of the porous fixing plates 4 increases gradually from the front end to the rear end of the steel strand bundle 1, and the heat-shrinkable plastic sleeve 3 at least encapsulates the porous fixing plate 4 with the thinner foremost end.

(4) Thermal shrinkage plastic sleeve 3: the length of the heat-shrinkable plastic sleeve 3 along the axial direction of the steel strand bundle 1 is 50-300mm.

The original heat-shrinkable plastic sleeve 3 is in a long cylinder shape, the inner diameter of the heat-shrinkable plastic sleeve 3 at the position of the fixed ring 2 is 30-50mm larger than that of the fixed ring 2, the heat-shrinkable plastic sleeve 3 is uniformly shrunk after being heated and wrapped at the front end of the steel strand bundle 1, the steel strand bundle which is slightly tilted and elastically deformed is wrapped, and meanwhile, the fixed ring 2 and the part of the steel strand bundle 1 at the rear side of the fixed ring 2 are wrapped, and at least the foremost thinner porous fixed plate 4 is preferably wrapped. The outer wall of the heat-shrinkable plastic pipe is smooth and the transition is gentle. The outer diameter of the rear part of the fixed ring 2 covered by the heat-shrinkable plastic sleeve 3 is smaller than the outer diameter of the part of the fixed ring 2 covered by the heat-shrinkable plastic sleeve 3, so that the heat-shrinkable plastic sleeve 3 is stably encapsulated at the front end of the steel strand bundle 1.

(5) Optionally, the steel wire: the steel wires wound around the periphery of the steel strand 1 along the length direction are used for integrally restraining and shaping the steel strand 1.

Example 1

Referring to fig. 1-2, a steel strand assembly for facilitating bundle construction in a tunnel according to the present embodiment includes:

(1) Steel strand 1: the steel strand is formed by bundling 19 steel strands, the front end of the steel strand bundle 1 is sleeved with a fixing ring 2, and the front end of the steel strand bundle 1 and the fixing ring 2 are encapsulated with a heat-shrinkable plastic sleeve 3; the rear end is sleeved with a porous fixing plate 4, and each steel strand passes through a corresponding threading hole on the porous fixing plate 4;

between the front end face of the steel strand 1 and the fixing ring 2, at least part of the steel strands are elastically deformed by outward tilting due to the extrusion action of the fixing ring 2.

(2) Fixing ring 2: the fixed ring 2 is an annular steel pipe, the width is 50mm, the wall thickness is 4mm, and the distance between the fixed ring 2 and the front end face of the steel strand bundle 1 is 30mm.

The fixed ring 2 is sleeved at the front end of the steel strand bundle 1 and is extruded and deformed by applying external force to reduce the inner diameter of the fixed ring 2, so that the steel strand bundle 1 is hooped, and the ratio of the inner diameters of the fixed ring 2 before being extruded to after being extruded is 1.03:1, the outer wall of the fixed ring 2 is extruded by the hydraulic blocks, and 4 bulges 5 are extruded outwards between the adjacent hydraulic blocks.

(3) Porous fixing plate 4: each threading hole on the porous fixing plate 4 corresponds to one steel strand, so that the steel strands in the steel strand bundle 1 are smoothly arranged.

(4) Thermal shrinkage plastic sleeve 3: the length of the heat-shrinkable plastic sleeve 3 along the axial direction of the steel strand bundle 1 is 200mm. After the heat shrinkage plastic sleeve 3 is heated, the steel strand is uniformly shrunk and wrapped at the front end of the steel strand bundle 1, the slightly tilted and elastically deformed steel strand is wrapped, and the fixing ring 2 and the steel strand bundle 1 at the rear side part of the fixing ring 2 are wrapped at the same time. The outer wall of the heat-shrinkable plastic pipe is smooth and the transition is gentle.

Example 2

Referring to fig. 3, the steel strand assembly of the present embodiment for facilitating in-tunnel strand construction includes:

(1) Steel strand 1: the steel strand is formed by bundling a plurality of steel strands, the front end of the steel strand bundle 1 is sleeved with a fixing ring 2, and the front end of the steel strand bundle 1 and the fixing ring 2 are encapsulated with a heat-shrinkable plastic sleeve 3; the rear end is sleeved with a porous fixing plate 4, and each steel strand passes through a corresponding threading hole on the porous fixing plate 4;

between the front end face of the steel strand 1 and the fixing ring 2, at least part of the steel strands are elastically deformed by outward tilting due to the extrusion action of the fixing ring 2.

(2) Fixing ring 2: the fixed ring 2 is an annular steel pipe, the width is 60mm, the wall thickness is 4mm, and the distance between the fixed ring 2 and the front end face of the steel strand bundle 1 is 40mm.

The fixed ring 2 is sleeved at the front end of the steel strand bundle 1 and is extruded and deformed by applying external force to reduce the inner diameter of the fixed ring 2, so that the steel strand bundle 1 is hooped, and the ratio of the inner diameters of the fixed ring 2 before being extruded to after being extruded is 1.05:1, the outer wall of the fixed ring 2 is extruded by the hydraulic blocks, and a plurality of bulges 5 are extruded outwards between the adjacent hydraulic blocks.

(3) Porous fixing plate 4: the front and rear porous fixing plates 4 are respectively provided with threading holes corresponding to one steel strand, so that the steel strands in the steel strand bundle 1 are smoothly arranged; the thinner front end fixing plate 4 of the two porous fixing plates 4 is positioned at the front end of the steel strand bundle 1, and the thicker rear end fixing plate 4 is positioned at the rear end of the steel strand bundle 1.

(4) Thermal shrinkage plastic sleeve 3: the length of the heat-shrinkable plastic sleeve 3 along the axial direction of the steel strand bundle 1 is 200mm. After the heat shrinkage plastic sleeve 3 is heated, the steel strand is uniformly shrunk and wrapped at the front end of the steel strand bundle 1, the slightly tilted and elastically deformed steel strand is wrapped, and the fixing ring 2, the steel strand bundle 1 at the rear side part of the fixing ring 2 and the thinner front end fixing plate 4 are wrapped at the same time. The outer wall of the heat-shrinkable plastic pipe is smooth and the transition is gentle.

(5) Steel wire 6: the steel wires wound around the periphery of the steel strand 1 along the length direction are used for integrally restraining and shaping the steel strand 1.

The foregoing description of the preferred embodiments of the present utility model has been presented for purposes of clarity and understanding, and is not intended to limit the utility model to the particular embodiments disclosed, but is intended to cover all modifications, alternatives, and improvements within the spirit and scope of the utility model as outlined by the appended claims.

Claims (10)

1. The steel strand assembly is characterized by comprising a steel strand, a fixing ring for tightening the front end of the steel strand, at least one porous fixing plate sleeved on the steel strand, and a heat-shrinkable plastic sleeve for wrapping at least the front end of the steel strand and the fixing ring;

Wherein, the tightening action of the fixing ring enables at least part of the steel stranded wires to elastically deform.

2. A steel strand assembly as claimed in claim 1, wherein the securing ring is an annular steel tube having a width of 30-70mm and a wall thickness of 3-6mm.

3. A steel strand assembly as claimed in claim 1, wherein the retaining ring is spaced from the front face of the steel strand by a distance of from 10 to 60mm.

4. A steel strand assembly as claimed in any one of claims 1 to 3, wherein the length of the heat shrinkable plastic sleeve in the axial direction of the steel strand is 50 to 300mm.

5. The steel strand assembly as claimed in claim 4, wherein the fixing ring is deformed by being sleeved on the front end of the steel strand and being extruded by an external force to reduce the inner diameter of the fixing ring, thereby tightening the steel strand, and the ratio of the inner diameters of the fixing ring before being extruded to after being extruded is (1.01-1.06): 1.

6. A steel strand assembly as claimed in claim 4, wherein between the front face of the steel strand and the fixing ring, at least part of the steel strands are elastically deformed by the pressing action of the fixing ring to tilt outwards.

7. The steel strand assembly of claim 6, wherein the outer surface of the retaining ring has at least 2 outwardly directed protrusions formed by the compression.

8. A steel strand assembly as claimed in any one of claims 5 to 7, wherein the heat shrink wrap extends from a front face of the steel strand and at least partially encloses the steel strand on the rear side of the securing ring.

9. The steel strand assembly of claim 8, wherein each of the plurality of threading holes in the perforated fixing plate has a number corresponding to one of the steel strands, respectively, so that the steel strands in the steel strand are smoothly arranged.

10. A steel strand assembly as claimed in claim 8, wherein a plurality of porous fixing plates are arranged in a direction from a front end to a rear end of the steel strand, and the heat shrinkable plastic sleeve encloses at least one porous fixing plate.