Power tower anchor bolt installation limiting protection support

Abstract

This utility model discloses a limiting and protective bracket for anchor bolt installation on power transmission towers, belonging to the field of power transmission tower construction technology. Addressing the problems of traditional anchor bolt installation, such as a single support structure, inconvenient height adjustment, and insufficient clamping force, this bracket achieves multi-dimensional limiting and enhanced dynamic stability through a modular structural design. Its core components include a base, an adjustable height support frame, and a U-shaped clamp assembly. The base and support frame form a triangular support system, enhancing anti-overturning capability. The adjustable support frame achieves ±500mm height adjustment via threaded engagement, adapting to different anchor bolt installation requirements. It is suitable for complex terrain, strong wind areas, and high-altitude environments, solving the problem of anchor bolt displacement caused by the impact of concrete pouring, ensuring the stability of the tower structure, improving construction efficiency by over 40%, and reducing overall costs by 25%.

Description

Technical Field

[0001] This utility model relates to the field of power transmission tower construction technology, specifically to a limit protection bracket for power transmission tower anchor bolt installation. Background Technology

[0002] As a core facility of power transmission systems, the accuracy of anchor bolt installation in power transmission towers directly affects the stability and safety of the tower structure. Traditional anchor bolt installation often suffers from positioning deviations due to a single support structure, inconvenient height adjustment, or insufficient clamping force. This is especially problematic in complex terrain or harsh construction environments, where the impact and buoyancy of concrete pouring can easily cause anchor bolt displacement or tilting, thus affecting the overall load-bearing performance of the tower. While some existing anchor bolt reinforcement devices employ U-shaped clamps or threaded adjustment structures, they generally suffer from insufficient lateral support, limited adjustment range, or poor installation adaptability. For example, some devices clamp anchor bolts only in a single direction, failing to accommodate the needs of multiple anchor bolts distributed across different planes; some support structures lack dynamic adjustment capabilities, making it difficult to cope with dynamic load changes during construction. Furthermore, traditional devices often require replacing the entire support assembly when installing anchor bolts at different heights, leading to low construction efficiency and increased costs. Therefore, there is an urgent need for an anchor bolt installation protection device that combines height adjustability, multi-directional clamping capability, and dynamic stability to improve the construction quality and safety of power transmission towers. Summary of the Invention

[0003] The purpose of this utility model is to provide a limit protection bracket for the installation of anchor bolts on power transmission towers.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a power tower anchor bolt installation limit protection bracket, comprising a base, an adjustable height support frame at the upper end of the base, a U-shaped clamp at the upper end of the adjustable height support frame, a knob at the end face of the U-shaped clamp, a vertical long screw at the upper end of the U-shaped clamp, a U-shaped clamp at the upper end of the vertical long screw, and a knob at the end face of the U-shaped clamp.

[0005] In a further preferred embodiment, the adjustable height support frame is threadedly engaged with a vertical long screw through a threaded hole at its center. Rotating the adjustable height support frame drives it to move up and down along the axial direction of the vertical long screw, thereby providing auxiliary support and positioning for anchor bolts at different height positions. After adjustment, its position is fixed by a locking mechanism.

[0006] More preferably, the opening directions of both the U-shaped clamp one and the U-shaped clamp two are adjustable, so that they can clamp the same anchor bolt from different or the same direction as needed, or clamp multiple anchor bolts in different planes respectively, thereby ensuring the relative positional accuracy and perpendicularity between all clamped anchor bolts.

[0007] In a further preferred embodiment, the base and the adjustable height support frame together form a stable triangular support system. The base is responsible for bearing the vertical pressure from the ground and providing overall stability, while the adjustable height support frame provides lateral support points for the anchor bolts through its U-shaped bracket structure, jointly resisting the impact force and buoyancy generated by the flow of concrete during the pouring process.

[0008] More preferably, the ends of the first and second knobs are configured to make close contact with the surface of the anchor bolt. When tightened, their ends generate a clamping force on the surface of the anchor bolt. This clamping force works together with the U-shaped inner walls of the first and second U-shaped clamps to form a three-point clamping effect, effectively limiting the displacement of the anchor bolt in any direction in the horizontal plane.

[0009] In a further preferred embodiment, the vertical long screw serves as the core load-bearing and adjustment component of the entire support. Its upper and lower ends are detachably connected to the first U-shaped clamp and the second U-shaped clamp, respectively. This connection method facilitates the rapid assembly or disassembly of the entire support according to the height range of the anchor bolt group on site, improving the adaptability and portability of the tool.

[0010] More preferably, the inner surfaces of the U-shaped clamp one and the U-shaped clamp two are provided with a structure to increase friction. This structure can increase the static friction of the contact surface when clamping the anchor bolt, preventing the anchor bolt from rotating or sliding when subjected to external force, thereby more reliably maintaining the preset angle and position of the anchor bolt during the pouring process.

[0011] This utility model provides a limiting and protective bracket for the installation of anchor bolts on power transmission towers, which has the following beneficial effects: (1) The bracket adopts an adjustable height support frame and a threaded fit design with a vertical long screw. By rotating and adjusting the position of the support frame, it can quickly adapt to the installation requirements of anchor bolts of different heights. At the same time, the self-locking characteristic of the thread ensures the stability of the position after adjustment. As the core load-bearing component, the vertical long screw has a detachable connection between its upper and lower ends and the U-shaped clamp. This facilitates quick assembly and, through the clamping force of knobs one and two, forms a three-point clamping effect with the inner wall of the U-shaped clamp, effectively limiting the horizontal displacement of the anchor bolt.

[0012] (2) The opening directions of U-shaped clamps one and two can be flexibly adjusted to support multi-directional clamping of a single anchor bolt or synchronous fixing of multiple anchor bolts in different planes, thus adapting to complex anchor bolt group layouts. The inner friction-enhancing structure further improves the clamping force, preventing the anchor bolt from rotating or sliding due to external forces during the pouring process, and ensuring the preset angle and verticality.

[0013] (3) The triangular support system formed by the base and the adjustable support frame disperses the vertical pressure of the ground through the base, and with the lateral support points of the adjustable support frame, it effectively resists the impact and buoyancy of concrete pouring and reduces the risk of anchor bolt displacement. The coordinated clamping design of the knob end and the U-shaped clamp, combined with the friction structure, forms a multi-limiting mechanism, which significantly enhances the device's resistance to deformation under dynamic loads.

[0014] (4) The detachable connection between the vertical long screw and the U-shaped clamp simplifies the tool assembly and disassembly process, adapting to different construction scenarios; the overall lightweight design ensures portability, while adjustable parameters cover a wide range of heights and clamping ranges, reducing on-site configuration requirements and improving construction efficiency. In summary, this support system, through its modular structure, dynamic adjustment capability, and multi-dimensional limiting design, solves the problems of low positioning accuracy, insufficient support stability, and poor adaptability in traditional anchor bolt installation, providing an efficient and reliable anchor bolt fixing solution for power transmission tower construction. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the structure of this utility model; Figure 3 This is a schematic diagram of the right side of the structure of this utility model. Detailed Implementation

[0017] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] How to use: I. Preparations before installation 1. Basic inspection: Confirm the flatness of the ground in the installation area, remove debris and loose soil, and ensure that the base 1 is placed stably.

[0020] Tools required: Equip with measuring tools such as torque wrenches, levels, and total stations, as well as auxiliary parts such as nuts and washers that match the anchor bolt specifications.

[0021] II. Bracket Assembly 1. Connecting the base 1 to the adjustable height support frame 2: Insert the bottom of the adjustable height support frame 2 into the preset slot at the top of the base 1 and fix it with bolts to ensure that the support frame 2 is perpendicular to the plane of the base 1.

[0022] Installation of vertical long screw 5: Screw the vertical long screw 5 into the threaded hole at the top of the adjustable height support frame 2, adjust the screw 5 to the initial position, and leave a margin for the installation height of the anchor bolt.

[0023] Assembly of U-shaped clamp 3 and U-shaped clamp 6: Fix U-shaped clamp 3 to the top of the vertical long screw 5 by threaded connection, and fix U-shaped clamp 6 to the bottom of the adjustable height support frame 2 by threaded connection, ensuring that the axes of the two clamps coincide.

[0024] III. Height Adjustment and Positioning 1. Adjust the adjustable height support frame 2: Rotate the adjustable height support frame 2 to raise and lower it along the vertical long screw 5 axis, and fix the required installation height of the anchor bolt through the thread self-locking function.

[0025] Horizontal calibration: Use a level to check the levelness of the base 1 and the adjustable support frame 2. If necessary, make fine adjustments by adjusting the bottom bolts of the base 1 to ensure that the verticality error of the overall support is ≤1°.

[0026] IV. Anchor Bolt Clamping Operation 1. Adjustment of the opening direction of the U-shaped clamp: According to the distribution plane of the anchor bolts, rotate the opening direction of U-shaped clamp 3 and U-shaped clamp 6 to adapt to the spatial layout of single or multiple anchor bolts.

[0027] Initial anchor bolt fixing: Insert the anchor bolts into the U-shaped grooves of U-shaped clamp 3 and U-shaped clamp 6 in sequence, and apply axial pressure by knob 4 and knob 7 to restrict the horizontal displacement of the anchor bolts by using the three-point clamping effect.

[0028] Enhanced clamping force: Tighten knob 4 and knob 7 to the preset torque value to ensure that the clamping surface is in close contact with the anchor bolt surface, increasing the friction coefficient to over 0.75 and preventing the anchor bolt from rotating or slipping during the pouring process.

[0029] V. Dynamic Stability Guarantee 1. Triangular support system activated: The base 1 and the adjustable height support frame 2 form a triangular force-bearing structure. The base 1 distributes the ground load, and the adjustable support frame 2 provides lateral support to resist the impact of concrete pouring.

[0030] Locking mechanism operation: After completing the height and angle adjustment, activate the locking bolts of the adjustable support frame 2 to eliminate thread clearance and ensure long-term stability of the adjustment position.

[0031] VI. Post-installation inspection and acceptance 1. Verticality retest: Use a total station to check the overall verticality of the anchor bolt assembly. The deviation should be ≤0.5mm.

[0032] Clamping force verification: The pull-out force of the anchor bolts is checked by random sampling using a tensile testing machine. The bearing capacity of a single anchor bolt must be ≥ 1.2 times the design value.

[0033] Friction performance test: Apply a lateral load to the surface of the anchor bolt and measure the displacement to ensure it does not exceed 0.1 mm.

[0034] VII. Construction Precautions 1. Environmental adaptability: In strong wind or high humidity environments, a counterweight block needs to be added to the base to improve the anti-tipping ability.

[0035] Regular maintenance: Check the thread wear of knob 1 (4) and knob 2 (7) every quarter, as well as the integrity of the friction coating of U-clamp 1 (3) and U-clamp 2 (6), and repair or replace them if necessary.

[0036] VIII. Handling of Special Working Conditions 1. Installation of irregular anchor bolt groups: For asymmetrically distributed anchor bolt groups, the clamping angles of U-clamp 3 and U-clamp 6 can be adjusted independently to form multi-point constraints.

[0037] Quick assembly and disassembly requirements: With the detachable design of the vertical long screw 5, a single screw can be replaced within 5 minutes, adapting to multiple project turnovers.

[0038] Example 1: Simultaneous Installation of Multiple Anchor Bolts in Complex Terrain In the construction of power transmission tower foundations in mountainous areas, the four anchor bolts at the tower base are arranged in a rectangular pattern with a 0.5-meter height difference from the ground. During installation, the support base is placed at the lowest point on the ground, and the vertical long screw is extended vertically to the highest anchor bolt position by adjusting the adjustable height support frame. The opening direction of U-shaped clamp one is adjusted to be consistent with the direction of the ground height difference, and its rotatable characteristic is used to clamp the diagonal anchor bolts. U-shaped clamp two clamps the other diagonal anchor bolt by rotating in the opposite direction. Knob one and knob two are tightened simultaneously, and the three-point clamping effect makes the four anchor bolts form a spatially stable structure. During construction, the lateral impact force generated by concrete pouring is decomposed by the triangular support system, and the box-shaped structure of the base evenly transmits the stress to the ground. Field tests show that the maximum offset of the anchor bolt group is controlled within 0.3mm, which is 80% more efficient than the traditional single-sided clamping method. Example 2: Wind-resistant reinforcement construction of iron towers in strong wind areas For typhoon-prone coastal areas, this support system is used to reinforce existing anchor bolts on steel towers. A vertical long screw and U-shaped clamp are pre-assembled as a detachable module. The adjustable height support frame allows clamp two to reach 300mm from the top of the anchor bolt. Knob two features an involute spline end face design, generating radial expansion force on the hexagonal head of the anchor bolt when tightened. Combined with the tungsten carbide-coated friction surface on the inner wall of the U-shaped clamp, this increases the pull-out resistance of a single anchor bolt to 18kN. The support system as a whole uses a base counterweight to increase its anti-overturning capacity. Under continuous 10-level winds, the anchor bolt displacement, monitored by a laser displacement sensor, did not exceed 0.15mm. After construction, the support system can be quickly disassembled and transferred to adjacent tower locations, allowing for the reinforcement of 5 towers per day. Example 3: Anchor Bolt Anti-Settlement Installation in High-Altitude Permafrost Regions When constructing in permafrost areas at an altitude of 4500 meters, this support system employs a special friction structure to cope with freeze-thaw cycles. The inner surface of the U-shaped clamp is laser-clad with a 200μm thick tungsten carbide coating, maintaining a stable friction coefficient of 0.82 at the contact surface with the anchor bolts. During installation, after adjusting the adjustable height support frame to the designed height, knobs one and two are alternately tightened to create a progressive clamping force. The foundation displacement caused by the expansion of the permafrost layer is absorbed by the triangular support system. The epoxy resin counterweights inside the base expand and contract with temperature changes, preventing stress concentration caused by rigid connections. After a 72-hour low-temperature cycling test (-40℃ to +20℃), the anchor bolt verticality deviation remained less than 0.2mm, meeting the requirements of DL / T 646-2018 standard. Example 4: Rapid assembly and disassembly of cross-river iron towers In the construction of tower foundations spanning rivers, the modular nature of the support system enables rapid deployment. Vertical long bolts are pre-assembled into 3-meter standard segments, connected by flanges to form a total length of 9 meters. The base utilizes a lightweight aluminum alloy frame, reducing weight by 60% compared to traditional steel bases. During construction, after positioning with a total station, a single person can complete the positioning and anchor bolt clamping of four sets of supports within 15 minutes. After concrete pouring, rotating knobs one and two in opposite directions releases pressure, achieving a 95% separation and recovery rate of the vertical long bolts from the U-shaped clamps. This solution reduces the anchor bolt installation time for a single tower to one-third of traditional methods and lowers the transport vehicle load requirement from 10 tons to 4 tons.

[0039] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The detailed description of known functions and components is omitted in the specific implementation of this disclosure. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A limit protection bracket for anchor bolt installation on power transmission towers, including a base (1), characterized in that: The upper end of the base (1) is provided with an adjustable height support frame (2), the upper end of the adjustable height support frame (2) is provided with a U-shaped clamp (3), the end face of the U-shaped clamp (3) is provided with a knob (4), the upper end of the U-shaped clamp (3) is provided with a vertical long screw (5), the upper end of the vertical long screw (5) is provided with a U-shaped clamp (6), the end face of the U-shaped clamp (6) is provided with a knob (7).

2. The power tower anchor bolt installation limiting and protective bracket according to claim 1, characterized in that: The adjustable height support frame (2) is threadedly engaged with the vertical long screw (5) through the threaded hole set in its center. Rotating the adjustable height support frame (2) can drive it to move up and down along the axis of the vertical long screw (5), thereby providing auxiliary support and positioning for anchor bolts at different height positions. After adjustment, its position is fixed by the locking mechanism.

3. The power tower anchor bolt installation limiting and protective bracket according to claim 1, characterized in that: The opening directions of both the U-shaped clamp one (3) and the U-shaped clamp two (6) are adjustable, so that they can clamp the same anchor bolt from different or the same direction as needed, or clamp multiple anchor bolts in different planes respectively, thereby ensuring the relative position accuracy and perpendicularity between all clamped anchor bolts.

4. The power tower anchor bolt installation limiting and protective bracket according to claim 1, characterized in that: The base (1) and the adjustable height support frame (2) together form a stable triangular support system. The base (1) is responsible for bearing the vertical pressure from the ground and providing overall stability, while the adjustable height support frame (2) provides lateral support points for the anchor bolts through its U-shaped bracket structure, together resisting the impact force and buoyancy generated by the flow of concrete during the pouring process.

5. The power tower anchor bolt installation limit protection bracket according to claim 1, characterized in that: The ends of the knobs 1 (4) and 2 (7) are designed to be in close contact with the surface of the anchor bolt. When tightened, the ends generate a clamping force on the surface of the anchor bolt. This clamping force works together with the U-shaped inner wall of the U-shaped clamp 1 (3) and U-shaped clamp 2 (6) to form a three-point clamping effect, which effectively restricts the displacement of the anchor bolt in any direction in the horizontal plane.

6. The power tower anchor bolt installation limiting and protective bracket according to claim 1, characterized in that: The vertical long screw (5) serves as the core load-bearing and adjustment component of the entire support. Its upper and lower ends are detachably connected to the U-shaped clamp one (3) and the U-shaped clamp two (6) respectively. This connection method facilitates the rapid assembly or disassembly of the entire support according to the height range of the anchor bolt group on site, improving the adaptability and portability of the tool.

7. The power tower anchor bolt installation limit protection bracket according to claim 1, characterized in that: The inner surfaces of the U-shaped clamp one (3) and the U-shaped clamp two (6) are provided with a structure to increase friction. This structure can increase the static friction of the contact surface when clamping the anchor bolt, and prevent the anchor bolt from rotating or sliding when subjected to external force, so as to more reliably maintain the preset angle and position of the anchor bolt during the pouring process.

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