A lightweight self-tensioning composite bracing structure

Abstract

The utility model discloses a light self-tensioning combined support structure, including the horizontal setting keel, the support bar with outer thread and two draw bars, one end of support bar is hinged with the middle part of keel, makes it can rotate in vertical plane and can rotate around self axis, and the threaded cooperation installation of adjusting nut is equipped on the support bar, and the sliding fit sleeve of mobile sleeve is equipped on the one side of support bar and is located adjusting nut and deviates from the one side of keel, and mobile sleeve is fixedly connected with adjusting nut, one end of draw bar is hinged with the position of the end of keel, and the other end is hinged with mobile sleeve, when support bar rotates around self axis, can drive mobile sleeve to move along the axis direction of support bar through adjusting nut. The utility model has enlarged the keel span range, has reduced the frame body consumption greatly, has increased the construction passage width, is convenient for the follow -up procedure intercalation, single person can carry operation, and fastly completes tensioning and release, satisfies the high turnover and green construction requirement.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a lightweight self-tensioning combined support structure. Background Technology

[0002] Prefabricated floor slabs generally offer advantages such as requiring no formwork or minimal supports. However, the current spacing of temporary support poles is typically 0.9 m or 1.2 m (with a few at 1.5 m). To achieve formwork-free and minimal support, the spacing of the support poles needs to be increased (≥1.5 m), leading to excessive deflection and stress of the bottom joists. Simply increasing the joist cross-section can increase the span, but the weight may increase to 20 kg / pole, making manual handling difficult and incompatible with existing top supports and accessories, thus failing to achieve the goal of "lightweight, large span, and high turnover." A tensioned beam structure with external joists can effectively reduce the bending moment and deflection of the joists, but traditional tensioned beams are only used for permanent roofs, requiring large jacks and reaction frames, making coordination with temporary support scaffolding difficult. Currently, there are no lightweight self-tensioning temporary supports suitable for floor slab construction with spans of around 2 m. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: a lightweight self-tensioning combined support structure, which solves the problem that the prior art lacks a lightweight temporary support structure suitable for the construction of large-span floor slabs.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A lightweight self-tensioning combined support structure includes a horizontally arranged keel, a threaded strut, and two tie rods. One end of the strut is hinged to the middle of the keel, allowing it to rotate in a vertical plane and around its own axis. An adjusting nut is threaded onto the strut, and a movable sleeve is slidably fitted onto the strut on the side of the strut opposite to the adjusting nut. The movable sleeve is fixedly connected to the adjusting nut. One end of the tie rod is hinged to the keel near its end, and the other end is hinged to the movable sleeve. When the strut rotates around its own axis, the movable sleeve can be moved along the axis of the strut via the adjusting nut.

[0005] As an optimization, the keel is a rectangular tube structure with multiple web holes spaced apart along its length on its vertical sidewall. The struts and tie rods are respectively hinged to the keel by pins inserted into the web holes.

[0006] As an optimization, the end of the support rod near the keel is coaxially and rotatably inserted into a hinged sleeve. A limiting ring is provided around the end of the support rod near this point. The hinged sleeve includes a sleeve body with an open lower end and a closed upper end. An annular boss that mates with the limiting ring is provided on the inner wall of the opening. When the end of the support rod is inserted into the sleeve body, the annular boss engages with the limiting ring to prevent the support rod from detaching from the hinged sleeve. An end plate is vertically provided on the upper surface of the sleeve body. The end plate is parallel to the side wall of the keel and has a connecting hole that aligns with the web hole on the keel. A pin is inserted into the connecting hole and the web hole to achieve the hinge connection between the support rod and the keel.

[0007] As an optimization, a stiffening lug is provided on the side of the end plate away from the keel. The stiffening lug is perpendicular to and fixedly connected to the upper end face of the end plate and the sleeve body, respectively.

[0008] As an optimization, the movable sleeve is provided with connecting lugs on opposite sides, and connecting holes are provided on the connecting lugs. The two pull rods are respectively hinged to the connecting lugs on both sides through pins passing through the connecting holes.

[0009] As an optimization, one end of the pull rod is provided with a single ear plate and the other end is provided with a double ear plate, and a connecting hole is provided on both the single ear plate and the double ear plate. The pull rod is hinged to the keel through a pin passing through the connecting hole on the single ear plate, and is hinged to the connecting ear plate through a pin passing through the connecting hole on the double ear plate.

[0010] As an optimization, a nut is provided at the other end of the support rod.

[0011] Compared with the prior art, this application has the following advantages: 1. The entire tensioning and releasing process does not require a jack; it can be completed with just an ordinary electric wrench, which is readily available on construction sites.

[0012] 2. The quick-install anti-loss pin (such as a pull-out steel ball pin) connects to the ear plate locking position. When installing, it locks with a simple insertion, and when removing, it detaches with a simple pull. There is no need to hold small parts at high altitudes, improving speed and safety.

[0013] 3. The keel and self-tensioning unit are designed separately. The keel can be used alone for small spans, or tensioning units can be added to extend the applicable span to more than 2 m. One set of components has multiple uses, simplifying inventory management.

[0014] 4. The tensioning adopts the "reverse loosening adjustment nut" self-unloading method, which does not require special unloading tools, avoids impact rebound, and protects the keel and template surface.

[0015] 5. Allows for asymmetrical installation of tie rods on both sides and approximate positioning of the struts, eliminating the need for precise alignment on site. This accommodates manufacturing deviations and construction errors in the keel hole positions, further shortening the installation time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the symmetrical installation structure of this utility model; Figure 3 This is a schematic diagram of the asymmetrical installation structure of this utility model; Figure 4 This is a schematic diagram of the assembly structure of the hinged sleeve and the support rod in this utility model; Figure 5 This is a schematic diagram of the hinged sleeve in this utility model; In the diagram, 1 is the keel, 2 is the strut, 3 is the tie rod, 4 is the adjusting nut, 5 is the nut, 6 is the web hole, 7 is the moving sleeve, 8 is the hinge sleeve, 9 is the end plate, 10 is the stiffening ear plate, 11 is the connecting ear plate, 12 is the single ear plate, 13 is the double ear plate, 14 is the limiting ring, and 15 is the annular boss. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] Example: See Figures 1-5 A lightweight self-tensioning combined support structure includes a horizontally arranged keel 1, a threaded strut 2, and two tie rods 3. The keel 1 is a rectangular tube structure with multiple web holes 6 spaced along its length on its vertical sidewall. The strut 2 has a portion (lower part) of threaded rods and a portion of plain (round) rods. In order to reduce weight, hollow tubular components are used in this embodiment. The tie rods 3 are plain (round) rods made of high-strength round steel pipes.

[0019] One end of the support rod 2 is hinged to the middle of the keel 1, allowing it to rotate in a vertical plane and around its own axis. An adjusting nut 4 is threaded onto the support rod 2, and a movable sleeve 7 is slidably fitted onto the support rod 2 on the side of the adjusting nut 4 away from the keel 1. The movable sleeve 7 is fixedly connected to the adjusting nut 4. Specifically, the upper end of the support rod 2, near the keel 1, is coaxially and rotatably inserted into a hinged sleeve 8. A limiting ring 14 is provided around the upper end of the support rod 2. The hinged sleeve 8 includes a sleeve body, and the lower end of the sleeve body... The sleeve has an opening, closed at the top, and an annular boss 15 on the inner wall of the opening that mates with the limiting ring 14. When the upper end of the support rod 2 is inserted into the sleeve body, the annular boss 15 engages with the limiting ring 14 to prevent the support rod 2 from disengaging from the hinged sleeve 8. An end plate 9 is vertically provided on the upper end face of the sleeve body. The end plate 9 is parallel to the side wall of the keel 1 and has a connecting hole that aligns with the web hole 6 on the keel 1. A stiffening lug 10 is provided on the side of the end plate 9 away from the keel 1. The stiffening lug 10 is perpendicular to and fixedly connected to the end plate 9 and the upper end face of the sleeve body to enhance its strength. The pin is inserted into the connecting hole and the web hole 6 to achieve the hinge connection between the support rod 2 and the keel 1, allowing the support rod 2 to rotate in the vertical plane and around its own axis. For ease of operation, a nut 5 is provided at the other end of the support rod 2 for easy rotation with an electric wrench.

[0020] One end of the pull rod 3 is hinged to the keel 1 near its end, and the other end is hinged to the movable sleeve 7. Specifically, the movable sleeve 7 has connecting ear plates 11 on opposite sides, and connecting holes are provided on the connecting ear plates 11. The two pull rods 3 are respectively hinged to the connecting ear plates 11 on both sides through pins passing through the connecting holes. One end of the pull rod 3 has a single ear plate 12, and the other end has a double ear plate 13. The double ear plate 13 consists of two parallel ear plates with a gap between them. During installation, the connecting ear plate of the movable sleeve 7 is inserted into the gap between the two ear plates. Connecting holes are provided on both the single ear plate 12 and the double ear plate 13. The pull rod 3 is hinged to the keel 1 through the pin passing through the connecting hole in the single ear plate 12, and hinged to the connecting ear plate 11 through the pin passing through the connecting hole in the double ear plate 13.

[0021] The pins used in all the above-mentioned connection parts are quick-release anti-loss pins, such as pull-out steel ball pins, which have their own elastic buckles to prevent falling from heights. They lock when inserted and can be removed by pulling. They are existing standard parts, and their specific structure and usage will not be described in detail.

[0022] The principle of this utility model is as follows: ① The pin passes through the connecting hole and the web hole in sequence to connect the various components and form a tensioned beam mechanical model; ② The rotating nut drives the strut to rotate → the adjusting nut drives the moving sleeve to move down → the tie rod is tensioned → the strut is compressed → the keel obtains a reverse arching force; ③ The nut is rotated in the opposite direction → the adjusting nut moves up → the system is unloaded → the entire structure can be disassembled by pulling out the pin.

[0023] During implementation: ① Support and leveling: Erect support scaffolding and adjust the uniform top support elevation; ② Place the keel: Place both ends of the keel on the top support; ③ Hang the tensioning unit: Align the web plate holes with the connection holes, insert the anti-loss pin, and complete the three hinges of the strut and the two tie rods. At this time, the adjusting nut is in a zero-relaxation state; ④ Tighten with an electric wrench: Stop when the keel arches by 2~3 mm or the torque reaches the set value (Note: the anti-arch amount is only for reference and is not necessary); ⑤ Pouring and curing: After the floor slab concrete reaches the demolding strength, loosen the adjusting nut in the reverse direction, and the system will automatically unload; ⑥ Overall dismantling: Pull out the anti-loss pin, remove the tensioning unit and keel, and move to the next span. The entire process is without welding and without small loose parts.

[0024] The lightweight self-tensioning composite support component for keels provided in this solution, in conjunction with existing top supports, allows keels to cover spans of over 2m without increasing the cross-section. It can be transported and installed by a single person, and connects to pre-drilled holes in the keel web with pins for rapid tensioning and release. It can also actively apply reverse arching force to reduce keel bending moment and deflection. The channel width is ≥1.5m, facilitating subsequent processes. All nodes use anti-loss quick-release pins, and the external unit is a single, integral component, reducing the number of component types and minimizing the risk of loss. Asymmetrical arrangement of the tie rods on both sides is permitted (specific allowable deviations need to be given after calculation and analysis based on the actual support unit parameters, provided that the keel stress and deflection within the same span still meet the requirements). Effective tensioning can be achieved without strict centering of the struts, significantly improving on-site installation tolerance and efficiency.

[0025] In summary, this utility model develops a lightweight self-tensioning combined support component that increases the common span of the keel from 1.2m to over 2.0m without increasing the keel's self-weight. Combined with a reduced-support system, it significantly reduces the amount of scaffolding required, increases the width of construction access channels, and facilitates subsequent construction processes. It also provides a lightweight self-tensioning unit for external keel mounting, which can be handled and operated by a single person, allowing for rapid tensioning and release. This achieves a rapid installation and dismantling process with "zero welding and zero large oil pumps," meeting the requirements of high turnover and green construction.

[0026] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A lightweight self-tensioning composite support structure, characterized in that: The device includes a horizontally arranged keel, a threaded support rod, and two tie rods. One end of the support rod is hinged to the middle of the keel, allowing it to rotate in a vertical plane and around its own axis. An adjusting nut is threaded onto the support rod, and a movable sleeve is slidably fitted onto the support rod on the side of the support rod opposite to the keel, with the movable sleeve fixedly connected to the adjusting nut. One end of the tie rod is hinged to the keel near its end, and the other end is hinged to the movable sleeve. When the support rod rotates around its own axis, the movable sleeve can be moved along the axis of the support rod via the adjusting nut.

2. The lightweight self-tensioning composite support structure according to claim 1, characterized in that, The keel is a rectangular tube structure with multiple web holes spaced at intervals along its length on its vertical sidewall. The struts and tie rods are respectively hinged to the keel by pins inserted into the web holes.

3. The lightweight self-tensioning composite support structure according to claim 2, characterized in that, The support rod is coaxially and rotatably inserted into a hinged sleeve at one end near the keel. A limiting ring is provided around the support rod near this end. The hinged sleeve includes a sleeve body with an open lower end and a closed upper end. An annular boss that mates with the limiting ring is provided on the inner wall of the opening. When the end of the support rod is inserted into the sleeve body, the annular boss engages with the limiting ring to prevent the support rod from detaching from the hinged sleeve. An end plate is vertically provided on the upper surface of the sleeve body. The end plate is parallel to the keel sidewall and has a connecting hole that aligns with the web hole on the keel. A pin is inserted into the connecting hole and the web hole to achieve the hinge connection between the support rod and the keel.

4. The lightweight self-tensioning composite support structure according to claim 3, characterized in that, A stiffening lug is provided on the side of the end plate away from the keel. The stiffening lug is perpendicular to and fixedly connected to the upper end face of the end plate and the sleeve body, respectively.

5. A lightweight self-tensioning composite support structure according to claim 1, characterized in that, The movable sleeve is provided with connecting lugs on opposite sides, and connecting holes are provided on the connecting lugs. The two pull rods are respectively hinged to the connecting lugs on both sides through pins passing through the connecting holes.

6. A lightweight self-tensioning composite support structure according to claim 5, characterized in that, One end of the pull rod is provided with a single ear plate, and the other end is provided with a double ear plate. A connecting hole is provided on both the single ear plate and the double ear plate. The pull rod is hinged to the keel through a pin passing through the connecting hole on the single ear plate, and is hinged to the connecting ear plate through a pin passing through the connecting hole on the double ear plate.

7. A lightweight self-tensioning composite support structure according to claim 1, characterized in that, The other end of the support rod is provided with a nut.

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