Anchor penetrating device for prestressed beam anchor bar bundle of hollow floor
By designing a prestressed beam anchor bundle penetration device for hollow floor structures, the problem of inconvenience of anchor bundle travel in dense steel mesh is solved, and the smooth running and efficient installation of anchor cables are achieved, and the work efficiency and safety are improved.
Patent Information
- Application Number
- CN202422032126.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-21
AI Technical Summary
In hollow floor structures, when installing prestressed anchor bars, it is easy to conflict with or deviate from dense steel bars, resulting in inconvenience in pushing and unstable operation, which increases the labor intensity and safety hazards of workers.
A hollow floor prestressed beam anchor beam penetration device is designed, which includes a guide outer shell, an anti-slip sleeve and a buffer pad. Through the interface friction between the cone shape of the guide outer shell and the anti-slip sleeve, the anchor beam is achieved smoothly through the dense steel wire mesh.
The device effectively controls the shuttle state of the anchor cable in the prestressed beam slab, reduces the phenomenon of being blocked or deviated by steel bars, improves the beam penetration speed and work efficiency, reduces the labor intensity of workers, and reduces safety hazards.
Smart Images
Figure CN223034338U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, and more specifically, to an anchor bar bundle threading device for prestressed beams of a hollow floor slab. Background Art
[0002] The prestressed hollow floor slab technology is a highly efficient and high-performance building structure technology using prestressed reinforced concrete structures, which has remarkable advantages such as improving the crack resistance of the structure, reducing the self-weight of the structure, increasing the usable space, fast construction speed, and saving materials.
[0003] In the hollow floor slab structure, after the installation of the steel bars of the slab and beams is completed, the threading and installation of the prestressed anchor cables need to be carried out. The cross beams and longitudinal beams are dense and cross each other. When workers install the prestressed anchor bar bundles through the beams, they often use a hook at the end of a short steel bar or steel pipe for guiding. Every time they cross a group of beam intersections, they need to climb over to the intersection of the next group of beams for guiding again. Due to the relatively dense horizontal and vertical steel bars at the bottom of the slab, the steel bars at the bottom of the beams, and the beam stirrups, during the forward movement of the end of the anchor bar bundle, it will often conflict with these steel bars or deviate and expose to the outside of the beam structure, and the workers pushing the anchor bar bundle need to adjust it again.
[0004] The conflict with the steel bars causes the anchor bar bundle to be unable to be pushed, and the workers pushing it receive a reaction force, which feels extremely bad; while if it deviates and runs out of the beam, the workers need to pull back a part and push it again, which is very inconvenient to operate.
[0005] Therefore, it is necessary to provide an anchor bar bundle threading device for prestressed beams of a hollow floor slab to solve the inconvenience caused by the simple hook guiding method used by workers when installing the prestressed anchor bar bundles through the beams. Content of the Utility Model
[0006] In view of this, the utility model provides an anchor bar bundle threading device for prestressed beams of a hollow floor slab. This device can be directly installed at the front end of the anchor bar bundle. Workers only need to push the anchor bar bundle at the beam support. When the front end of the anchor bar bundle reaches the other end support of the beam, remove this device, repeat the previous action, and continue the threading and installation of the subsequent anchor bar bundles through the beams.
[0007] To achieve the above purpose, the utility model adopts the following technical solutions:
[0008] An anchor bar bundle threading device for prestressed beams of a hollow floor slab includes a guiding outer shell. The front end of the guiding outer shell is in the shape of a cone, and the rear end is in the shape of a cylinder. And the overall length of the guiding outer shell is greater than twice the distance between adjacent beam stirrups; a group of anti-slip rubber sleeves are fixed in the rear end port of the guiding outer shell by connecting hinge shafts, and the inner hole diameter of the anti-slip rubber sleeves is slightly larger than the diameter of the prestressed anchor bar bundle; a buffer pad is filled inside the cone at the front end of the guiding outer shell.
[0009] Preferably, the length ratio between the cone and the cylinder in the guiding outer casing is 0.8 to 1:1.5.
[0010] Preferably, the inner hole wall of the anti-slip rubber sleeve is threaded, and the inner hole wall forms interfacial friction with the external corrugations of the prestressed anchor tendon bundle.
[0011] Preferably, the anti-slip rubber sleeve is fixed to the rear end of the guiding outer casing by using a rivet as the connecting hinge shaft.
[0012] Preferably, the anti-slip rubber sleeve is made of a thick-walled corrugated pipe, and the inner hole diameter of the anti-slip rubber sleeve is 5 to 10 mm larger than the diameter of the prestressed anchor tendon bundle.
[0013] Preferably, the front side orifice of the anti-slip rubber sleeve is a flared opening.
[0014] Preferably, the buffer pad is a soft wood block or a rubber pad.
[0015] Preferably, the buffer pad is adhesively fixed inside the cone at the front end of the guiding outer casing by glue.
[0016] Preferably, the outer wall of the guiding outer casing is painted with fluorescent paint.
[0017] Preferably, a return traction ring is connected to the outside of the front side tip of the guiding outer casing.
[0018] During use, pass the device of the present utility model through the beam stirrups, place the tip in the direction of the advancement of the anchor tendon bundle near the prestressed beam support at one end. When the worker passes the prestressed anchor tendon bundle through the side beam steel mesh, the operator slightly lifts the rear end of the device, and passes the front end of the anchor tendon bundle through the anti-slip rubber sleeve of the device, and then places it on the beam bottom steel bars.
[0019] Command the worker who pushes the prestressed anchor tendon bundle to push the anchor forward, apply force evenly, and try to maintain a uniform advancement speed. The anchor tendon bundle passes through one by one under the guidance of the device and quickly reaches the other end support of the beam.
[0020] When the device is about to reach the opposite support of the beam, slow down the speed of pushing the anchor tendon bundle. When it reaches about 50 cm inside the side beam, remove the device from the end of the anchor tendon bundle, and then align the end of the anchor tendon bundle with the side beam steel mesh hole and pass through the side beam of the support.
[0021] The front end of the device of the present utility model is conical, and a certain distance can be maintained from the beam and slab steel bars during forward movement. When passing through the dense steel mesh, it can smoothly avoid the beam bottom steel bars and beam stirrups, and there will be no phenomenon of being directly blocked and hindering the passage.
[0022] Compared with the prior art, a hollow floor prestressed beam anchor tendon bundle threading device of the present utility model is installed at the front end of the anchor tendon bundle, which can effectively control the threading state of the anchor cable in the prestressed beam slab, and rarely appears the phenomenon of being blocked by steel bars or running off track and running out of the beam; during the process of the anchor cable passing through the beam, there is no need to arrange personnel to track and correct in the middle, reducing the safety hazards brought by workers climbing over the beam steel cage.
[0023] This device has a fast passing speed in the middle of the prestressed beam steel cage, which is more than 5 times faster than the conventional method of using an iron hook by personnel to correct the threading, greatly improving the work efficiency while reducing the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.
[0025] Figure 1 It is a longitudinal sectional view of a hollow floor prestressed beam anchor tendon bundle threading device of the present utility model.
[0026] Figure 2 For Figure 1 It is an A-A cross-sectional view of a hollow floor prestressed beam anchor tendon bundle threading device in
[0027] Figure 3 It is an installation schematic diagram of a hollow floor prestressed beam anchor tendon bundle threading device of the present utility model.
[0028] Figure 4 It is a threading diagram of the device of the present utility model in the prestressed beam steel mesh.
[0029] Figure 5 It is a structural schematic diagram of installing a return traction ring in an embodiment of the device of the present utility model.
[0030] In the figure: 1 - guiding outer shell, 2 - anti-slip rubber sleeve, 3 - connecting hinge shaft, 4 - buffer pad, 5 - prestressed anchor tendon bundle, 6 - bell mouth, 7 - return traction ring, 8 - beam stirrup, 9 - beam bottom steel bar. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0031] The following will describe in detail the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.
[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
[0034] Embodiment:
[0035] As Figure 1 , Figure 2 shown, the present utility model provides an anchor bar bundle threading device for prestressed beams of a hollow floor slab, belonging to the field of construction of prestressed beam and slab structures of hollow floor slabs in public buildings. Specifically, it includes a guiding outer shell 1. The front end of the guiding outer shell 1 is in a conical shape, and the rear end is in a cylindrical shape. Moreover, the overall length of the guiding outer shell 1 is greater than twice the distance between adjacent beam stirrups. A set of anti-slip rubber sleeves 2 are fixed in the rear end port of the guiding outer shell 1 by a connecting hinge shaft 3, and the inner hole diameter of the anti-slip rubber sleeve 2 is slightly larger than the diameter of the prestressed anchor bar bundle 5. A buffer pad 4 is filled inside the cone at the front end of the guiding outer shell 1.
[0036] During installation, the worker holds the device and passes it through the stirrups of the prestressed beam at the starting end of the anchor bar bundle, paying attention that the pointed end faces the advancing direction. Then, hold the guiding outer shell 1 and pass the front end of the prestressed anchor bar bundle 5 through the anti-slip rubber sleeve 2 and top it against the buffer pad 4 to complete the installation. As Figure 3 shown.
[0037] During operation, while the worker opens the coiled prestressed anchor tendon bundle 5, he pushes the anchor tendon bundle under the command of the shift leader. The anchor tendon bundle slides forward rapidly against the guiding outer shell 1 of the device and quickly reaches near the opposite beam support. The worker at the opposite beam support shouts to stop the pushing at a position suitable for the device from the beam end, generally about 50 cm. Then, he holds the guiding outer shell 1 and disengages the anchor tendon bundle from the anti-slip rubber sleeve 2. Next, he aligns the front end of the anchor tendon bundle with the steel bar mesh holes at the beam end, passes the anchor tendon bundle through the support beam, and adjusts the exposed length within the deviation range to complete the work of passing a single cable through the beam. Subsequently, the device is taken out from the gap between the stirrups of the prestressed beam and passed to the starting position of the next anchor tendon bundle, and the above actions are repeated to complete the work of passing other anchor tendon bundles through the anchor.
[0038] Further preferably, the length ratio between the cone and the cylinder in the guiding outer shell 1 is 0.8 - 1:1.5. At the same time, since the overall length of the guiding outer shell 1 is greater than twice the distance between adjacent beam stirrups, the device of the present utility model can be automatically corrected during forward movement and will not run out of the beam through the stirrups on the side of the beam.
[0039] In the device of the present utility model, the inner hole diameter of the anti-slip rubber sleeve 2 is slightly larger than the diameter of the prestressed anchor tendon bundle 5. At the same time, the inner hole wall of the anti-slip rubber sleeve 2 is threaded, and the inner hole wall forms interfacial friction with the external corrugations of the prestressed anchor tendon bundle 5. In this way, even if the pusher accidentally exerts too much force and forms forward inertia, the guiding outer shell 1 on the anchor tendon bundle will not fall off.
[0040] Further preferably, the anti-slip rubber sleeve 2 uses a rivet (generally a large flat head rivet) as the connecting hinge shaft 3 and is fixed to the rear end of the guiding outer shell 1.
[0041] Since the anti-slip rubber sleeve 2 needs to be adjusted according to the external dimensions of the prestressed anchor tendon bundle 5, using a rivet as the connecting hinge shaft can facilitate the worker to install, remove and replace the anti-slip rubber sleeve 2 smoothly.
[0042] Further preferably, the anti-slip rubber sleeve 2 is made of a thick-walled corrugated pipe. The inner hole diameter of the anti-slip rubber sleeve 2 is 5 - 10 mm larger than the diameter of the prestressed anchor tendon bundle 5. For example, in a specific embodiment, if the diameter of the prestressed anchor tendon bundle 5 is 24 mm, a thick-walled corrugated pipe with an inner diameter of 30 mm can be selected to make the anti-slip rubber sleeve 2.
[0043] Further preferably, the front side orifice of the anti-slip rubber sleeve 2 is a flared opening 6 for convenient insertion. Specifically, at the front side orifice of the anti-slip rubber sleeve 2, a hot melt tool is used to expand the port into a flared opening 6 to facilitate the anchor tendon bundle to pass through the anti-slip rubber sleeve 2 and enter the guiding outer shell 1.
[0044] The buffer pad 4 is a soft wood block or a rubber pad, and the soft wood block or the rubber pad is generally fixedly adhered to the inside of the cone at the front end of the guiding outer shell 1 by glue. The buffer pad 4 is used to reduce the impact between the front end of the prestressed tendon bundle and the guiding outer shell 1 and protect the end of the steel strand.
[0045] Further preferably, a fluorescent paint is applied to the outer wall of the guiding outer shell 1, so that workers can still visually observe the position and speed of the steel strand pushing at a distance at night or in a dim environment. The manual pushing of the tendon bundle installation belongs to pure physical labor. It is more convenient to carry out night construction in hot summer to avoid the heat, making the advantages of the device of the present utility model more significant.
[0046] Further preferably, as Figure 5 shown, a return traction ring 7 (generally a small iron ring) is connected to the outside of the front tip of the guiding outer shell 1. When installing the device of the present utility model at the starting end of the tendon bundle threading through the anchor, a thin string (fishing line) can be first tied to the return traction ring 7 and removed when the device reaches the opposite beam support, and then turned around. The worker at the starting end can pull the device back to the starting end by pulling the thin string.
[0047] The specific manufacturing method of the device of the present utility model is as follows:
[0048] The guiding outer shell 1 in the device is made of a steel pipe with a diameter of 80 mm and a wall thickness of 3 mm, and the length is about 350 mm. The front end of the steel pipe is longitudinally and cross-cut by 150 mm, and an isosceles triangle is cut from the root of the opening to the top. The four triangular pieces are respectively closed inward and welded into a conical shape. Then, some glue is applied to the inner side about 5 cm from the top of the cone, and the soft wood block or the rubber pad is adhered to it as a buffer rubber pad to protect the front end of the tendon bundle and at the same time reduce the inertial impact brought when pushing the tendon bundle; then the anti-slip rubber sleeve 2 made of thick-wall corrugated pipe is fixed to the guiding outer shell 1 by using large flat head rivets.
[0049] The usage method of the present utility model is as follows:
[0050] When in use, as Figure 4 shown, the device of the present utility model is passed through the beam stirrup 8, and the tip is placed near the prestressed beam support at one end in the advancing direction of the tendon bundle. When the worker passes the prestressed tendon bundle 5 through the side beam reinforcement mesh, the operator slightly lifts the rear end of the device, and passes the front end of the prestressed tendon bundle 5 through the anti-slip rubber sleeve 2 of the device, and then places it on the mesh of the beam bottom reinforcement 9.
[0051] Command the worker who pushes the prestressed tendon bundle 5 to push the tendon forward, apply force evenly, and try to keep a uniform speed. The tendon bundle passes through one by one under the guidance of the device and quickly reaches the support at the other end of the beam. Figure 4 The direction indicated by the arrow in
[0052] When the device is about to reach the opposite support of the beam, slow down the speed of pushing the prestressed tendon bundle. When it reaches about 50 cm inside the side beam, remove the device from the end of the tendon bundle, then align the end of the tendon bundle with the mesh holes of the side beam steel bars and pass through the side support beam.
[0053] After the prestressed tendon bundle 5 passes through the opposite support of the beam, turn the device to the starting point and start the work of threading the next tendon bundle through the beam.
[0054] The front end of the device of the present utility model is conical. During forward movement, it can maintain a certain distance from the steel bars of the beam slab and can smoothly avoid the bottom steel bars 9 and stirrups 8 of the beam when passing through the dense steel bar mesh, without directly jamming and causing obstacles to the passage.
[0055] During actual operation, the devices of the present utility model required for a single prestressed beam can also be manufactured according to a unified specification, pushed one by one from the starting end to the opposite beam support, then collected centrally and transferred together to the starting point of the second beam. The single weight of the device of the present utility model is about 1.0 Kg, generally 6 in number, with a total weight of 6.0 Kg, which can reduce the number of personnel transfers.
[0056] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and reference can be made to the description in the method part for related parts.
[0057] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A hollow floor prestressed beam anchor tendon threading device, characterized in that: It includes a guide outer shell, the front end of which is in a cone shape, the rear end of which is in a cylindrical shape, and the overall length of the guide outer shell is greater than twice the spacing between two adjacent beam stirrups; a group of anti-slip rubber sleeves are fixed in the rear end port of the guide outer shell by a connecting hinge shaft, and the inner hole diameter of the anti-slip rubber sleeves is slightly larger than the diameter of the prestressed anchor bar bundle; the interior of the cone at the front end of the guide outer shell is filled with a buffer pad.
2. The anchoring device for prestressed beams of hollow floor slabs according to claim 1, characterized in that: The length ratio between the cone and the cylinder in the guide outer shell is 0.8 to 1:1.
5.
3. The anchoring device for anchoring tendons of prestressed beams of hollow floor slabs according to claim 1, characterized in that: The inner hole wall of the anti-slip rubber sleeve is threaded, and the inner hole wall forms interface friction with the outer corrugation of the prestressed anchor bar bundle.
4. The anchoring device for anchoring tendons of prestressed beams of hollow floor slabs according to claim 3 is characterized in that: The anti-slip rubber sleeve is fixed to the rear end of the guide outer shell body by using rivets as the connecting hinge shaft.
5. The anchoring device for anchoring tendons of prestressed beams of hollow floor slabs according to claim 3, characterized in that: The anti-skid rubber sleeve is made of a thick-walled corrugated pipe, and the inner hole diameter of the anti-skid rubber sleeve is 5 to 10 mm larger than the diameter of the prestressed anchor bar bundle.
6. The anchoring device for anchoring tendons of prestressed beams of hollow floor slabs according to claim 3, characterized in that: The front side opening of the anti-slip rubber sleeve is a bell mouth.
7. The anchoring device for anchoring tendons of prestressed beams of hollow floor slabs according to claim 1, characterized in that: The buffer pad is a cork block or a rubber pad.
8. The anchoring device for prestressed beams of hollow floor slabs according to claim 1 or 7, characterized in that: The buffer pad is glued to the inside of the cone at the front end of the guide outer shell.
9. The anchoring device for prestressed beams of hollow floor slabs according to claim 1, characterized in that: The outer wall of the guide outer shell is painted with fluorescent paint.
10. The anchoring device for anchoring tendons of prestressed beams of hollow floor slabs according to claim 1, characterized in that: The front tip of the guide outer shell is externally connected with a return traction ring.