CN213740603U - Auxiliary device for pre-stressed steel strand penetration of prefabricated T-shaped beam - Google Patents
Auxiliary device for pre-stressed steel strand penetration of prefabricated T-shaped beam Download PDFInfo
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- CN213740603U CN213740603U CN202021883690.7U CN202021883690U CN213740603U CN 213740603 U CN213740603 U CN 213740603U CN 202021883690 U CN202021883690 U CN 202021883690U CN 213740603 U CN213740603 U CN 213740603U
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Abstract
The utility model discloses an auxiliary device for the pre-stressed steel strand pulling of a prefabricated T beam, which comprises a support steel reinforcement cage and a jacking component; the upper part of the support steel reinforcement cage is opened, a horizontally arranged circular truncated cone-shaped wire winding and unwinding platform with the top end facing outwards is fixed on the outer side of one end face of the steel reinforcement cage, and the top end and the bottom end of the wire winding and unwinding platform are both in an opened state; the steel bar cage is characterized by also comprising a cylindrical roller with the central axis collinear with that of the take-up and pay-off table, wherein the external roller is sleeved on the internal fixed cylinder in a sliding manner through bearings at the head end and the tail end, one end of the internal fixed cylinder is fixed inside the steel bar cage at the opposite side of the take-up and pay-off table, and the other end of the internal fixed cylinder is connected with the internal fixed cylinder through an end plate with a screw hole, which is connected through an end screw; lift steel strand wires off the ground completely to make the steel strand wires dish rotate on the tube-shape gyro wheel along with the unwrapping wire process through the tube-shape gyro wheel, prevent to appear knoing, winding problem at the unwrapping wire in-process, can effectively promote production efficiency, the cost is reduced and safe risk.
Description
Technical Field
The utility model relates to a prestressed concrete post-tensioning method construction equipment field especially relates to an auxiliary device that is used for the rigid stranded conductor of prefabricated T roof beam prestressing force to wear to restraint.
Background
At present, highway construction is carried out on a large scale in China, a prefabricated T beam is a key upper structure in a simply-supported and then-continuous structural bridge of the highway, and strand penetration of steel strands is a first process in prestress tensioning construction of the T beam. At present, manual strand pulling is generally adopted, and the method is that after the concrete of the main body structure of the T beam is molded by casting, the strand pulling work of the prestressed steel strand is manually completed in a corrugated pipe which is pre-embedded in the T beam for many times. When the method is adopted to thread the T-beam steel strand, the following problems exist: on the one hand, the steel strand pulling operation platform needs more section steel and manpower, the 30-meter T beam needs at least 6 persons, 1.5 prefabricated T beams are pulled in a pulling mode at most every day, the labor intensity of manual pulling is high, a large amount of labor force is needed, meanwhile, the pulling construction period is long, the efficiency is low, and the next procedure is often influenced due to the fact that the progress cannot be followed up. And certain potential safety hazards exist in the construction on the operation platform, and the installation is difficult.
In order to solve the problem that manual strand threading efficiency is low and a large amount of manpower is needed, a strand threading machine, also called a prestressed steel strand threading machine, a steel strand shuttle machine, a steel strand reeving machine, a steel strand pipe threading machine and the like is on the market at present, and the machine is driven mechanically, rollers clamp steel strands for conveying, can advance, retreat, can convey continuously and can convey the steel strands inching, the speed of conveying the steel strands can be regulated in a stepless manner, the operation is convenient, the performance is reliable, the efficiency is obvious, and the labor intensity is greatly reduced.
However, in the use process of the strand pulling machine, due to the fact that the blanking length of the prestressed steel strands is long, and the prestressed pipeline has certain degree of wave-shaped bending, in the construction process of the prestressed T-beam, the steel strands are easy to wind, so that the steel strands do not correspond to anchor plate holes, stress difference exists among the steel strands, friction resistance between the steel strands and anchor openings of the anchor plates is increased, prestress loss is increased, and the service life of a prefabricated part structure is influenced; in addition, because the existing steel strand paying-off is usually to place the steel strand coil on the ground for paying-off, the problem of winding and knotting easily occurs in the paying-off process, so that the net length of the steel strand changes, the stress of each steel strand in the tensioned steel strand bundle is different, and the actual elongation measurement result can exceed the allowable deviation condition.
SUMMERY OF THE UTILITY MODEL
The technical problem that this application actually will solve is: the existing steel strand pulling machine is easy to wind and knot in the paying-off process, so that the structure of a prefabricated part is changed, and the service life of the prefabricated part is influenced.
In order to solve the technical problem, the utility model provides an auxiliary device for the pre-stressed steel strand of a prefabricated T-shaped beam, which comprises a support steel reinforcement cage and a jacking assembly; the upper part of the support steel reinforcement cage is opened, a horizontally arranged circular truncated cone-shaped wire winding and unwinding table with the top end facing outwards is fixed on the outer side of one end face of the steel reinforcement cage, and the top end and the bottom end of the wire winding and unwinding table are both in an opened state; the steel bar cage is characterized by further comprising a cylindrical roller with the central axis collinear with that of the take-up and pay-off table, wherein the cylindrical roller comprises an external roller and an internal fixed cylinder, the external roller is slidably sleeved on the internal fixed cylinder through bearings at the head end and the tail end, one end of the internal fixed cylinder is fixed inside the steel bar cage at the opposite side of the take-up and pay-off table, and the other end of the internal fixed cylinder is connected with the internal fixed cylinder through an end plate with a screw hole, which is connected through an; the jacking assembly comprises a supporting plate arranged below the support steel reinforcement cage and small hydraulic rods arranged at four corners of the lower surface of the supporting plate.
Particularly, the outer walls of the front end and the rear end of the external roller are provided with limiting bulges which are uniformly distributed along the circumferential direction, and the outer ends of the limiting bulges on the external roller are also provided with hanging rings.
Particularly, the outer diameter of the external roller is the same as the inner diameter of the steel strand coil, the head end and the tail end of the external roller are connected with vertically arranged bearings through support rods arranged inside the roller body, and the inner diameter of each bearing is the same as the outer diameter of the internal roller.
Particularly, the openings of the end faces of the upper end and the lower end of the take-up and pay-off table are internally provided with anti-abrasion bushings.
The utility model has the advantages that: the device has simple structure and simple and quick manufacturing process, and the raw materials are common materials of construction sites; simultaneously lift off steel strand wires from ground completely through the tube-shape gyro wheel to make the steel strand wires dish rotate on the tube-shape gyro wheel along with the unwrapping wire process through the tube-shape gyro wheel, prevent to appear knoing, winding problem at the unwrapping wire in-process, can effectively promote production efficiency, the cost is reduced and safe risk.
Drawings
Fig. 1 is a schematic view of the cross-sectional structure of the device of the present invention.
Fig. 2 is a schematic structural view of the barrel roller.
Wherein, the support steel reinforcement cage-1; a take-up table-2; a cylindrical roller-3; an outer drum-31; an internal fixed cylinder-32; a bearing-33; an end plate-34; -35 of a strut; a pallet-4; a small hydraulic ram-41; a limiting bulge-5; a lifting ring-6.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
An auxiliary device for pre-fabricated T-beam prestressed steel strand penetration comprises a support steel reinforcement cage 1 and a jacking assembly; the upper part of the support steel reinforcement cage 1 is opened, a horizontally arranged circular truncated cone-shaped wire take-up platform 2 with the top end facing outwards is fixed on the outer side of one end face of the support steel reinforcement cage 1, and the top end and the bottom end of the wire take-up platform 2 are both in an open state; the wire take-up platform is characterized by further comprising a cylindrical roller 3 with the central axis collinear with that of the wire take-up platform 2, wherein the cylindrical roller 3 comprises an external roller 31 and an internal fixed cylinder 32, the external roller 31 is slidably sleeved on the internal fixed cylinder 32 through bearings 33 at the head end and the tail end, one end of the internal fixed cylinder 32 is fixed inside a support reinforcement cage 1 at the opposite side of the wire take-up platform 2, and the other end of the internal fixed cylinder 32 is connected with the internal fixed cylinder 32 through an end plate 34 with a screw hole, which is connected through an end screw; the jacking assembly comprises a supporting plate 4 arranged below the support steel reinforcement cage 1 and small hydraulic rods 41 arranged at four corners of the lower surface of the supporting plate 4.
As a preferred embodiment, the outer diameter of the outer roller 31 is the same as the inner diameter of the steel strand coil, the head end and the tail end of the outer roller 31 are connected with a vertically arranged bearing 33 through a strut 35 arranged inside the barrel body, and the inner diameter of the bearing 33 is the same as the outer diameter of the inner fixed barrel 32; the steel strand coil can just be sleeved into the outer roller 31 and can be rotatably fixed on the inner fixed cylinder 32 through bearings 33 at the head end and the tail end of the outer roller 31.
As a preferred embodiment, the outer walls of the front and rear ends of the external drum 31 are provided with limit protrusions 5 uniformly distributed along the circumferential direction, and the outer ends of the limit protrusions 5 on the external drum 31 are further provided with hanging rings 6; play the effect that prevents outside cylinder 31 slippage through spacing arch 5, play through rings 6 and embolia behind the steel strand wires drum hoist to the inside effect of support steel reinforcement cage 1 at initial stage.
As a preferred embodiment, the anti-abrasion bushings are arranged in the end face openings at the upper end and the lower end of the take-up and pay-off table 2, so that the quality problem of a prefabricated part caused by the friction damage of the steel strand and the end face of the take-up table 2 due to the fluctuation on the vertical height in the process of paying off and threading is prevented.
The utility model discloses the theory of operation of device does: local materials are used in a construction site, welding and assembling are carried out, attention is paid to the fact that the bottom of the take-up platform 2 is fixed at the grid formed by the cross rods and the vertical rods of the support reinforcement cage 1 in the welding process, and the bottom end opening of the take-up platform 2 is opposite to the cylindrical roller 3. Then, the wire coil of the steel strand is sleeved into the external roller 31 and placed between the limiting bulges 5 to prevent the wire coil from sliding off. Hang the outside cylinder 31 that has the steel strand wires drum horizontally through rings 6 and hoisting accessory on the outside cylinder 31, hoist to the inside solid fixed cylinder 32 in the support steel reinforcement cage 1 with the height after the upper portion opening through support steel reinforcement cage 1 again with the bearing of connecting through branch 35 on the outside cylinder 31 aim at inside solid fixed cylinder 32 after inserting, then connect end plate 34 through the terminal end screw rod of inside solid fixed cylinder 32, play the effect of fixed outside cylinder 31 through end plate 34, prevent outside cylinder 31 slippage from inside solid fixed cylinder 32 in unwrapping wire and the process of restrainting of wearing. Because the wire coil size of the steel strand is larger, the steel strand is coiled from the wire coil in the sequence from outside to inside and from inside to outside in the paying-off and threading process, so that the height change of the steel strand on the horizontal height in the paying-off process is larger, the steel strand is threaded through the bottom end of the circular truncated cone-shaped wire take-up table 2 and is transmitted out from the top end, and the wire take-up table 2 plays a role in stabilizing the height change in the paying-off process. Meanwhile, the steel strand inevitably rubs with the outer wall of the take-up table 2 in the process, so that the quality of the prefabricated part is affected in order to prevent the abrasion of the steel strand, and anti-abrasion bushings are particularly arranged in end face openings at the upper end and the lower end of the take-up table 2.
Because the height of the corrugated pipe needing to be threaded in the prefabricated T-shaped beam generally floats between 1.2 m-1.5 m, and in order to prevent the steel strand from changing too much in vertical height, a small hydraulic rod 41 is arranged at the bottom of the steel reinforcement cage 1 through the supporting plate 4, the height of the support steel reinforcement cage 1 can be adjusted through the small hydraulic rod 41, so that the central axes of the cylindrical roller 3 and the take-up table 2 can be just opposite to the corrugated pipe to be threaded, and the problem of the threading quality of the prestressed steel strand caused by too large height fluctuation is prevented.
The utility model discloses the device lifts steel strand wires through the tube-shape gyro wheel simultaneously and leaves ground completely to make the steel strand wires dish rotate along with the unwrapping wire process on the tube-shape gyro wheel through the tube-shape gyro wheel, prevent to appear knoing, winding problem at the unwrapping wire in-process, can effectively promote production efficiency, the cost is reduced and safe risk.
The utility model discloses "connect", "fixed" that appear in the description can be fixed connection, machine-shaping, welding, also can mechanical connection, and particular case understands that the aforesaid belongs to the utility model provides a concrete meaning.
In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., are used, and their designated orientations or positional relationships are only for convenience of description and simplicity of description, but do not indicate or imply that the designated device or element must have a particular orientation, and therefore should not be construed as limiting the present invention.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. An auxiliary device for pre-stressed steel strand penetration of a prefabricated T-shaped beam is characterized by comprising a support steel reinforcement cage (1) and a jacking assembly; the upper part of the support steel reinforcement cage (1) is opened, a horizontally arranged circular truncated cone-shaped wire take-up platform (2) with the top end facing outwards is fixed on the outer side of one end face of the support steel reinforcement cage (1), and the top end and the bottom end of the wire take-up platform (2) are both in an open state; the wire take-up device is characterized by further comprising a cylindrical roller (3) with the central axis collinear with that of the wire take-up platform (2), wherein the cylindrical roller (3) comprises an external roller (31) and an internal fixed cylinder (32), the external roller (31) is slidably sleeved on the internal fixed cylinder (32) through bearings (33) at the head end and the tail end, one end of the internal fixed cylinder (32) is fixed inside a support steel reinforcement cage (1) at the opposite side of the wire take-up platform (2), and the other end of the internal fixed cylinder (32) is connected with an end plate (34) with a screw hole, which is connected with an end screw rod; the jacking assembly comprises a supporting plate (4) arranged below the support steel reinforcement cage (1) and small hydraulic rods (41) arranged at four corners of the lower surface of the supporting plate (4).
2. The auxiliary device for pre-stressed steel strand pulling of the prefabricated T-shaped beam as claimed in claim 1, wherein the outer diameter of the outer roller (31) is the same as the inner diameter of the steel strand coil, the head and the tail of the outer roller (31) are connected with vertically arranged bearings (33) through supporting rods (35) arranged inside the barrel body, and the inner diameter of each bearing (33) is the same as the outer diameter of the inner fixed barrel (32).
3. The auxiliary device for pre-stressed steel strand pulling of the prefabricated T-beam as claimed in claim 1, wherein the outer walls of the front and rear ends of the external roller (31) are provided with limiting protrusions (5) uniformly distributed along the circumferential direction, and the outer ends of the limiting protrusions (5) on the external roller (31) are further provided with hanging rings.
4. The auxiliary device for pre-stressed steel strand pulling of the prefabricated T-beam as claimed in claim 1, wherein the openings of the end surfaces of the upper and lower ends of the take-up table (2) are provided with anti-abrasion bushings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021883690.7U CN213740603U (en) | 2020-09-02 | 2020-09-02 | Auxiliary device for pre-stressed steel strand penetration of prefabricated T-shaped beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021883690.7U CN213740603U (en) | 2020-09-02 | 2020-09-02 | Auxiliary device for pre-stressed steel strand penetration of prefabricated T-shaped beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213740603U true CN213740603U (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021883690.7U Active CN213740603U (en) | 2020-09-02 | 2020-09-02 | Auxiliary device for pre-stressed steel strand penetration of prefabricated T-shaped beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213740603U (en) |
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2020
- 2020-09-02 CN CN202021883690.7U patent/CN213740603U/en active Active
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