A single post wind resistant sign bracket and method of use

Abstract

The application provides a single-column shock-absorbing signboard support and a use method thereof, and belongs to the technical field of municipal engineering; the signboard support comprises a stand column, a base is arranged at the bottom end of the stand column, a signboard panel is arranged at the top end of the stand column, the stand column comprises a movable pipe and a fixed pipe arranged coaxially, the bottom end of the movable pipe is inserted into the inside of the top end of the fixed pipe in an axially rotatable manner, the movable pipe and the fixed pipe overlap in the axial direction and form a damping energy dissipation section; the damping energy dissipation section is provided with a friction damping piece, a pre-tightening adjusting mechanism and a shear pin; the friction damping piece is attached to the outer wall of the movable pipe; the pre-tightening adjusting mechanism is arranged on the fixed pipe, and the inner end of the pre-tightening adjusting mechanism abuts against the friction damping piece; and the shear pin is inserted into the damping energy dissipation section in a radial direction. The shear pin can meet the use requirements of the signboard support under normal working conditions and working conditions with excessive load, so that the signboard panel and the stand column can be effectively prevented from being damaged or overturned; and the pre-tightening adjusting mechanism can meet the requirements of dissipating earthquake and wind-induced energy under different working conditions.

Description

Technical Field

[0001] This invention belongs to the field of municipal engineering technology, and in particular relates to a single-column wind-resistant and shock-absorbing sign bracket and its usage method. Background Technology

[0002] Currently, most road traffic signs, municipal signs, and outdoor monitoring poles use a rigid, single-column structure for their supports. The column is typically a circular or polygonal steel pipe, directly and rigidly connected to a concrete foundation at the bottom, with the sign panel cantilevered at the top. Under strong winds and moderate to high-intensity earthquakes, the connection between the support and the concrete foundation experiences significant concentrated stress, making it prone to weld tearing, column buckling, and even complete collapse, threatening road safety. In strong winds, the sign panel bears a large wind load, easily leading to panel cracking or significant swaying of the support. At high wind frequencies, bolt loosening and weld fatigue can also occur, reducing safety. Existing technologies often address these issues by increasing the support cross-section and reinforcing the foundation, but this increases the cost of the support. Furthermore, if an earthquake or strong wind damages the support, it often requires complete replacement of the entire support and reconstruction of the foundation, resulting in long construction periods, significant traffic disruption, and high repair costs. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a single-column wind-resistant and shock-absorbing sign bracket and its usage method, which can effectively prevent damage or overturning of the sign panel and column during strong winds or earthquakes, thereby improving the safety of the sign bracket and facilitating maintenance and repair.

[0004] The technical solution adopted in this invention is: a single-column wind-resistant and shock-absorbing sign bracket, comprising a column, a foundation at the bottom of the column, and a sign panel at the top. The column includes a movable tube and a fixed tube arranged coaxially. The bottom end of the movable tube is axially rotatably inserted into the top end of the fixed tube. The movable tube and the fixed tube overlap axially to form a damping energy dissipation section. The damping energy dissipation section is provided with a friction damping element, a pre-tightening adjustment mechanism, and a shear pin. The friction damping element is wrapped and fitted to the outer wall of the movable tube. The pre-tightening adjustment mechanism is disposed on the fixed tube, and the inner end of the pre-tightening adjustment mechanism abuts against the friction damping element. The shear pin is radially inserted into the damping energy dissipation section.

[0005] Furthermore, the bottom end of the movable tube is provided with a bearing, and is connected to the fixed tube through the bearing.

[0006] Furthermore, the bearing is a thrust cylindrical roller bearing, the inner wall of the fixed tube is provided with a limiting boss, the limiting boss is provided with a limiting groove, and the bearing is embedded in the limiting groove.

[0007] Furthermore, the friction damping component is made of multilayer polymer composite material.

[0008] Furthermore, the pre-tightening adjustment structure includes a stop member, an elastic member, a guide member, and a locking member; the locking member is placed on the outside of the fixed tube, and the stop member and the elastic member are disposed on the inside of the fixed tube; one end of the guide member is threaded to the locking member, and the other end passes through the fixed tube and the elastic member in sequence, and is connected to the stop member.

[0009] Furthermore, the side of the abutment member facing the friction damping member is a curved surface, and the curvature of the curved surface is equal to the curvature of the outer surface of the friction damping member.

[0010] Furthermore, the pre-tightening adjustment structure is uniformly arranged along the circumference of the fixed tube.

[0011] Furthermore, the damping energy dissipation section is also provided with a first limiting block, a second limiting block, and a third limiting block located at the same height. The first limiting block is symmetrically arranged on the outer wall of the movable tube along a first radial line, the second limiting block is symmetrically arranged on the inner wall of the fixed tube along a second radial line, and the third limiting block is symmetrically arranged on the inner wall of the fixed tube along a third radial line. The second limiting block and the third limiting block extend to both sides of the first limiting block.

[0012] Furthermore, the outer wall of the movable tube is provided with a protective cover, which is located above the damping energy dissipation section and extends radially to the outside of the fixed tube.

[0013] The method of using the single-column wind-resistant and shock-absorbing sign bracket as described above includes the following steps:

[0014] Carry out basic construction and install fixed pipes;

[0015] Install friction damping components at the bottom of the movable tube;

[0016] The movable tube and the friction damping element are inserted into the fixed tube;

[0017] Install shear pins;

[0018] Adjust the preload force of the preload adjustment mechanism;

[0019] Install the signage panel, and perform testing and inspection;

[0020] If the shear pin breaks, replace the shear pin.

[0021] The advantages and positive effects of this invention are:

[0022] (1) By setting shear pins, the movable tube and the fixed tube can form a rigid connection to meet the needs of the sign bracket under normal working conditions; it can also break under excessive load conditions, so that the friction damping component and the pre-tightening adjustment mechanism form sliding friction, dissipating earthquake and wind-induced energy, thereby effectively preventing the sign panel and column from being damaged or overturned, and ensuring the safety of the sign bracket under special working conditions.

[0023] (2) By setting a pre-tightening adjustment mechanism, the pre-tightening force applied by the pre-tightening adjustment mechanism to the friction damping component can be flexibly adjusted, thereby controlling the magnitude of the friction force and meeting the needs of dissipating seismic and wind-induced energy under different working conditions;

[0024] (3) When the shear pin breaks, it can be quickly repaired by simply replacing the shear pin. The overall cost is low, construction is fast, and it occupies little road space.

[0025] (4) By setting limit blocks, the rotation angle of the inner tube can be strictly controlled to avoid overturning and pipeline pulling caused by excessive rotation. While achieving energy dissipation and shock reduction, the safety of the sign bracket is further improved.

[0026] (5) The structure is simple and durable, and can be used in harsh outdoor conditions for a long time; it is easy to process and install, and has good durability and stability. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the damping energy dissipation section structure according to a specific embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the pre-tightening adjustment mechanism according to a specific embodiment of the present invention.

[0030] In the picture:

[0031] 1. Column; 11. Movable tube; 111. First limiting block; 12. Fixed tube; 121. Second limiting block; 122. Third limiting block; 133. Bearing; 13. Damping energy dissipation section; 2. Friction damping component; 3. Pre-tightening adjustment mechanism; 31. Support component; 32. Elastic component; 33. Guide component; 34. Locking component; 4. Shear pin; 5. Foundation; 6. Sign panel. Detailed Implementation

[0032] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0033] like Figure 1As shown in the figure, this embodiment of the invention proposes a single-column wind-resistant and shock-absorbing sign support, including a column 1, a foundation 5 at the bottom of the column 1, and a sign panel 6 at the top. The column 1 includes a movable tube 11 and a fixed tube 12 arranged coaxially. The bottom end of the movable tube 11 is axially rotatably inserted into the top end of the fixed tube 12. The movable tube 11 and the fixed tube 12 overlap axially to form a damping energy dissipation section 13. The damping energy dissipation section 13 is provided with a friction damping element 2, a pre-tightening adjustment mechanism 3, and a shear pin 4. The friction damping element 2 covers and fits against the outer wall of the movable tube 11. The pre-tightening adjustment mechanism 3 is disposed on the fixed tube 12, and the inner end of the pre-tightening adjustment mechanism 3 abuts against the friction damping element 2. The shear pin 4 is radially inserted into the damping energy dissipation section 13. By setting shear pin 4, a rigid connection can be formed between movable pipe 11 and fixed pipe 12, meeting the needs of the sign bracket under normal working conditions. It can also break under excessive load conditions, causing friction damping component 2 and pre-tightening adjustment mechanism 3 to form sliding friction, dissipating seismic and wind-induced energy, thereby effectively preventing damage or overturning of the sign panel and column 1, and ensuring the safety of the sign bracket under special working conditions. By setting pre-tightening adjustment mechanism 3, the pre-tightening force applied by pre-tightening adjustment mechanism 3 to friction damping component 2 can be flexibly adjusted to control the magnitude of friction force and meet the needs of dissipating seismic and wind-induced energy under different working conditions. When shear pin 4 breaks, it can be quickly repaired by simply replacing shear pin 4, with low overall cost, fast construction, and minimal road occupation.

[0034] When the wind load or vibration load is small, the movable pipe 11 is fixed inside the fixed pipe 12 by the shear pin 4, which can meet the needs of normal operation. When the wind load or vibration load is large, the shear pin 4 breaks, the movable pipe 11 rotates axially, and drives the friction damping component 2 to rotate. The friction damping component 2 and the pre-tightening adjustment mechanism 3 are in frictional cooperation, which can dissipate the energy of earthquake and wind, and prevent the sign panel and column 1 from being damaged or overturned, thus meeting the needs of extreme operation. By setting the pre-tightening adjustment mechanism 3, the pressure applied by the pre-tightening adjustment mechanism 3 to the friction damping component 2 can be flexibly adjusted as needed.

[0035] In this embodiment, the above-mentioned single-column wind-resistant and shock-absorbing sign bracket can be a road traffic sign, a municipal sign, or an outdoor monitoring pole, etc. The column 1 is a circular steel pipe, the foundation 5 can be a concrete foundation 5, and the bottom of the column 1 is rigidly connected to the foundation 5; the top of the column 1 can be connected to the sign panel 6 through a flange or a clamp.

[0036] like Figure 2As shown, the cross-sections of the fixed tube 12 and the movable tube 11 are both circular, and the diameter of the movable tube 11 is smaller than the diameter of the fixed tube 12. The bottom end of the movable tube 11 is inserted into the top end of the fixed tube 12. The fixed tube 12 and the movable tube 11 are provided with corresponding locking holes in the damping energy dissipation section 13. Preferably, the fixed tube 12 is provided with at least two symmetrical locking holes, and the movable tube 11 is also provided with at least two symmetrical locking holes. By rotating the fixed tube 12 and the movable tube 11, the locking holes of the two can be connected. The shear pin 4 can pass through the locking hole from one end of the fixed tube 12, through the movable tube 11, and out from the other end of the fixed tube 12, thereby locking the relative position of the fixed tube 12 and the movable tube 11.

[0037] When the sign panel 6 is subjected to horizontal wind loads or vibration loads, a rotational torque is generated, which causes the movable tube 11 to rotate as well, creating a shear force at the contact point between the shear pin 4 and the movable tube 11. The shear pin 4 has a designed fracture threshold. When the shear force on the shear pin 4 is within this designed fracture threshold range, the shear pin 4 can fix the movable tube 11 and prevent it from rotating, thus meeting the usage requirements of the sign bracket under normal conditions. When the wind load or vibration load on the sign panel 6 is large, and the shear force on the shear pin 4 exceeds its designed fracture threshold range, the shear pin 4 will break.

[0038] Understandably, after the shear pin 4 breaks, under the action of wind load or vibration load, the sign panel 6 drives the movable tube 11 to rotate axially. During the rotation, friction is formed between the friction damping component 2 and the pre-tightening adjustment structure, thereby dissipating earthquake and wind-induced energy through friction.

[0039] After the sign panel 6 is rotated, its windward surface becomes smaller, thus reducing the wind load it receives. This significantly reduces the bending moment and shear force at the connection between the column 1 and the foundation 5, effectively preventing weld tearing, column 1 buckling, and overall overturning, thereby improving the safety of the column 1. At the same time, it also effectively prevents the sign panel 6 from cracking, the bracket from swaying significantly, bolts from loosening, and weld fatigue, further enhancing the safety and service life of the sign bracket.

[0040] After the shear pin 4 breaks, it can be restored simply by replacing the shear pin 4 and relocking the fixed pipe 12 and the movable pipe 11. Compared with the existing technology, which requires replacing the entire column 1 and re-pouring the foundation 5 after an earthquake or strong wind causes damage to the column 1, resulting in a long construction period, significant traffic disruption, and high repair costs, this embodiment has low repair costs, fast construction, and does not require long-term occupation of road space, thus better meeting the needs of batch operation and maintenance and post-disaster emergency repair of sign brackets.

[0041] The pre-tightening adjustment mechanism 3 is installed on the outer tube and has an inner end located inside the outer tube and an outer end located outside the outer tube. Its inner end abuts against the friction damping component 2, thereby applying a pre-tightening force to the friction damping component 2. Under different pre-tightening forces, the magnitude of the friction force formed between the friction damping component 2 and the pre-tightening adjustment mechanism 3 when rotating is also different. Therefore, the pre-tightening force applied by the pre-tightening adjustment mechanism 3 can be adjusted according to the seismic fortification intensity and wind load level of the location of the sign support, thereby accurately setting the friction damping force.

[0042] Furthermore, in this embodiment, a bearing 133 is provided at the bottom end of the movable tube 11, and it is connected to the fixed tube 12 through the bearing 133. By setting the bearing 133, the frictional resistance between the movable tube 11 and the fixed tube 12 can be reduced, ensuring that the movable tube 11 can smoothly rotate axially after the shear pin 4 breaks; at the same time, by setting the bearing 133, the movable tube 11 can be fixed at a set height position, and the upper load of the movable tube 11 and the sign panel 6 can be transferred to the fixed tube 12, thereby improving the stability of the overall structure.

[0043] In one specific embodiment, the upper loads of the movable tube 11 and the nameplate panel 6 are relatively large. The bearing 133 is a thrust cylindrical roller bearing. The inner wall of the fixed tube 12 is provided with a limiting boss, and the limiting boss is provided with a limiting groove. The bearing 133 is embedded in the limiting groove. By setting the limiting groove, a foundation 5 is provided for the installation of the bearing 133. At the same time, the bearing 133 can transfer the upper load to the limiting boss, and then to the fixed tube 12.

[0044] In some other embodiments of this application, other bearing structures in the prior art may also be used, and no limitation is made here.

[0045] The limiting boss is an annular structure protruding from the inner wall of the fixed tube 12, and the limiting groove is an annular groove formed on the top surface of the limiting boss. The thrust cylindrical roller bearing includes a shaft ring, a seat ring, and cylindrical rollers and a cage sandwiched between the shaft ring and the seat ring. The seat ring is fixed at the bottom of the limiting groove, and the bottom end of the movable tube 11 presses against the shaft ring. Preferably, the limiting groove extends to the outer side of the bottom end of the movable tube 11, and there is a small gap between the side wall of the limiting groove and the outer wall of the bottom end of the movable tube 11, thereby limiting the movable tube 11 and ensuring that the movable tube 11 can rotate stably and avoid deviation.

[0046] Furthermore, in the embodiments of this application, the friction damping component 2 is made of multilayer polymer composite material, preferably fiber reinforced plastic (FRP), including a resin matrix and a reinforcement, wherein the resin matrix provides toughness and formability, and the reinforcement mainly bears the pressure load. The resulting friction damping component 2 has good toughness, high strength, high modulus and lightweight properties, and can be tightly adhered to the outer wall of the inner tube to form friction resistance with the pre-tightening adjustment mechanism 3.

[0047] Furthermore, in the embodiments of this application, such as Figure 3 As shown, the pre-tightening adjustment structure includes a stop member 31, an elastic member 32, a guide member 33, and a locking member 34. The locking member 34 is located on the outside of the fixed tube 12, while the stop member 31 and the elastic member 32 are located on the inside of the fixed tube 12. One end of the guide member 33 is threaded to the locking member 34, and the other end passes through the fixed tube 12 and the elastic member 32 in sequence, and is connected to the stop member 31. By turning the locking member 34, the length of the guide member 33 located on the inside of the outer tube can be adjusted, and the stop member 31 can be moved, thereby controlling the stop member 31 to apply a stable pre-tightening force to the friction damping member 2. By setting the elastic member 32, the elastic member 32 abuts against the inner wall of the outer tube and the stop member 31, which can provide flexible buffering and avoid local stress concentration caused by machining tolerances, assembly gaps, or instantaneous wind load impacts, so that the axial rotation of the movable tube 11 is smooth and not easy to jam, thereby ensuring the long-term consistent wind resistance and shock absorption performance of the sign bracket.

[0048] The aforementioned pre-tightening adjustment structure is evenly arranged along the circumference of the fixed tube 12, and the number is preferably not less than three; the aforementioned elastic element 32 is preferably a disc spring, which occupies little space and is easy to assemble, and the guide element 33 and the locking element 34 can control the axial compression stroke of the disc spring, which can ensure that the pre-tightening adjustment structure has the same clamping load, and that the abutment element 31 is located at the same relative position on the outer tube, providing the same pre-tightening force to the friction damping element 2.

[0049] Furthermore, in the above embodiment, the side of the abutment 31 facing the friction damper 2 is curved, and the curvature of the curved surface is equal to the curvature of the outer surface of the friction damper 2. This setting can increase the contact area between the abutment 31 and the friction damper 2, ensuring that the friction damper generates uniform and reliable energy-consuming friction force, and preventing the abutment 31 from scraping or jamming the friction damper 2.

[0050] Preferably, multiple abutment members 31 are adjacent to each other, so that multiple curved surfaces can be enclosed to form a complete cylindrical curved surface structure, which can fully cover the outer periphery of the friction damping member 2, realize uniform circumferential pressure, ensure stable friction energy dissipation, and help improve the stability of wind resistance and shock absorption performance.

[0051] Furthermore, in this embodiment, the damping energy dissipation section 13 further includes a first limiting block 111, a second limiting block 121, and a third limiting block 122 located at the same height. The first limiting block 111 is symmetrically arranged on the outer wall of the movable tube 11 along a first radial line, the second limiting block 121 is symmetrically arranged on the inner wall of the fixed tube 12 along a second radial line, and the third limiting block 122 is symmetrically arranged on the inner wall of the fixed tube 12 along a third radial line. The second limiting block 121 and the third limiting block 122 extend to both sides of the first limiting block, respectively. Preferably, with the shear pin 4 locked, the first limiting block 111 is equidistant from the second limiting block 121 and the third limiting block 122. After the shear pin 4 breaks, depending on the direction of the wind load or vibration load, the inner tube drives the first limiting block 111 to rotate closer to the second limiting block 121 or the third limiting block 122 until the first limiting block 111 abuts against the second limiting block 121 or the third limiting block 122. By setting the first limiting block 111 in a limiting engagement with the second limiting block 121 and the third limiting block 122, the rotation angle of the inner tube can be strictly controlled, avoiding overturning and pipeline pulling caused by excessive rotation. This achieves energy dissipation and vibration reduction while further improving the safety of the sign holder.

[0052] In one specific embodiment, the smaller radial angle between the second and third radial lines is 15° to 20°, and the maximum rotatable angle of the inner tube is 30° to 40°.

[0053] In the above embodiments, the bearing, shear pin 4, friction resistance component, and limiting block are arranged at different heights of the damping energy dissipation section 13 from bottom to top to avoid mutual obstruction; the shear pin 4 is arranged at a lower position to facilitate replacement by maintenance personnel. In some other embodiments of this application, the bearing, shear pin 4, friction resistance component, and limiting block can be arranged at different heights of the damping energy dissipation section 13, and there is no limitation here.

[0054] Furthermore, in this embodiment, the outer wall of the movable tube 11 is provided with a protective cover, which extends radially and seals the gap between the outer tube and the inner tube. The protective cover can protect the damping energy dissipation section 13, isolate it from outdoor sand and rain erosion, and ensure the durability of the friction damping component 2 and the towel adjustment mechanism.

[0055] Specifically, the protective cover can be a flat plate structure or a cover structure with a lower edge. It can contact the top of the fixed tube 12 or be spaced apart from the top of the fixed tube 12, as long as it does not affect the rotation of the movable tube 11. No restrictions are imposed here.

[0056] Furthermore, this application embodiment also proposes a method for using the above-mentioned single-column wind-resistant and shock-absorbing sign bracket, including the following steps:

[0057] S1. Carry out foundation 5 construction and install fixed pipe 12;

[0058] In this embodiment, when pouring the concrete foundation 5, a matching flange is pre-embedded in the foundation 5; after the foundation 5 is completed, the bottom of the fixing pipe 12 is connected to the pre-embedded flange with rigid bolts to ensure that the fixing pipe 12 is vertical, stable and without displacement or shaking.

[0059] S2. Install the friction damping component 2 at the bottom end of the movable tube 11;

[0060] The friction damping component 2 is an annular friction damping plate made of resin-based polymer composite material, which is fitted into the outer wall of the movable tube 11 to ensure that the friction damping component 2 fits tightly without gaps.

[0061] S3. Insert the movable tube 11 and the friction damping component 2 into the fixed tube 12;

[0062] Ensure that the bottom end of the movable tube 11 is inserted into the limiting groove, and that the movable tube 11 and the fixed tube 12 are coaxially arranged.

[0063] S4. Install shear pin 4;

[0064] Adjust the relative positions of the movable tube 11 and the fixed tube 12 to make the locking hole pass through. Then, pass the shear pin 4 through the locking hole. Both ends of the pin are threaded with butterfly clips and are fixed to the fixed tube 12 by the butterfly clips to ensure that the movable tube 11 has no corners or shaking.

[0065] S5. Adjust the preload force of the preload adjustment mechanism 3;

[0066] The pre-tightening adjustment mechanism 3 is pre-installed on the fixed pipe 12. By tightening the locking member 34, the abutment member 31 can press against the friction damping member 2. The pre-tightening force of the pre-tightening adjustment mechanism 3 can be adjusted according to the seismic fortification intensity and wind load level of the location to ensure that the pre-tightening force of all pre-tightening adjustment mechanisms 3 is consistent. In this embodiment, the pre-tightening force can be controlled by measuring the length of the exposed end of the guide member 33.

[0067] S6. Install sign panel 6 and perform debugging and inspection;

[0068] The sign panel 6 is fixed to the top of the movable pipe 11 by flanges or clamps to ensure that the sign is installed flat and without eccentric load.

[0069] Adjust the verticality of the overall sign bracket, check the locking status of the shear pin 4, the fit of the friction damping plate and the position of the limit block. After confirming that there is no looseness or deviation, weld the protective cover on the outer wall of the movable pipe 11 above the energy dissipation section of the damping zone to complete the installation of the entire sign bracket.

[0070] S7. After shear pin 4 breaks, replace shear pin 4.

[0071] Under normal conditions of light wind and minor earthquakes, the shear pin 4 remains intact, and the movable tube 11 and fixed tube 12 form a rigid whole. The sign bracket does not rotate or sway, and the sign remains clearly visible, meeting daily usage needs. When strong winds or moderate to high-intensity earthquakes occur, and the wind load or seismic load exceeds the design fracture threshold of the shear pin 4, the shear pin 4 breaks instantly. The rigid constraint of the movable tube 11 and fixed tube 12 is released, and the movable tube 11 rotates axially within the fixed tube 12. During the rotation, the annular friction damping plate and the pre-tightening adjustment mechanism 3 generate sliding friction, continuously dissipating earthquake and wind-induced energy. Therefore, it can effectively reduce the bending moment transmitted to the connection between the column 1 and the foundation 5. The inner tube is limited after rotating to the point where the first limit block 111 abuts against the second limit block 121 or the first limit block 111 abuts against the third limit block 122, preventing excessive torsional overturning and achieving safe energy dissipation and vibration reduction.

[0072] After an earthquake or strong wind, simply remove the broken shear pin 4 fragments, readjust the movable tube 11 and fixed tube 12 to their initial coaxial positions, align the locking holes, and replace with a new shear pin 4. This will lock the movable tube 11 and fixed tube 12 again, restoring the rigidity of the sign bracket and quickly completing the repair, thus restoring the sign bracket to its normal function.

[0073] The advantages and positive effects of this invention are:

[0074] (1) By setting shear pins, the movable tube and the fixed tube can form a rigid connection to meet the needs of the sign bracket under normal working conditions; it can also break under excessive load conditions, so that the friction damping component and the pre-tightening adjustment mechanism form sliding friction, dissipating earthquake and wind-induced energy, thereby effectively preventing the sign panel and column from being damaged or overturned, and ensuring the safety of the sign bracket under special working conditions.

[0075] (2) By setting a pre-tightening adjustment mechanism, the pre-tightening force applied by the pre-tightening adjustment mechanism to the friction damping component can be flexibly adjusted, thereby controlling the magnitude of the friction force and meeting the needs of dissipating seismic and wind-induced energy under different working conditions;

[0076] (3) When the shear pin breaks, it can be quickly repaired by simply replacing the shear pin. The overall cost is low, construction is fast, and it occupies little road space.

[0077] (4) By setting limit blocks, the rotation angle of the inner tube can be strictly controlled to avoid overturning and pipeline pulling caused by excessive rotation. While achieving energy dissipation and shock reduction, the safety of the sign bracket is further improved.

[0078] (5) The structure is simple and durable, and can be used in harsh outdoor conditions for a long time; it is easy to process and install, and has good durability and stability.

[0079] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A single-column wind-resistant and shock-absorbing sign bracket, comprising a column, wherein the column has a foundation at its bottom end and a sign panel at its top end, characterized in that: The column includes a movable tube and a fixed tube arranged coaxially. The bottom end of the movable tube is axially rotatable and inserted into the top end of the fixed tube. The movable tube and the fixed tube overlap axially to form a damping energy dissipation section. The damping energy dissipation section is provided with a friction damping element, a pre-tightening adjustment mechanism, and a shear pin. The friction damping element is wrapped and fitted to the outer wall of the movable tube. The pre-tightening adjustment mechanism is disposed in the fixed tube, and the inner end of the pre-tightening adjustment mechanism abuts against the friction damping element. The shear pin is radially inserted into the damping energy dissipation section.

2. The single-column wind-resistant and shock-absorbing sign bracket according to claim 1, characterized in that: The bottom end of the movable tube is provided with a bearing, and is connected to the fixed tube through the bearing.

3. The single-column wind-resistant and shock-absorbing sign bracket according to claim 2, characterized in that: The bearing is a thrust cylindrical roller bearing. The inner wall of the fixed tube is provided with a limiting boss, and the limiting boss is provided with a limiting groove. The bearing is embedded in the limiting groove.

4. The single-column wind-resistant and shock-absorbing sign bracket according to claim 1, characterized in that: The friction damping component is made of multilayer polymer composite material.

5. The single-column wind-resistant and shock-absorbing sign bracket according to any one of claims 1-4, characterized in that: The pre-tightening adjustment structure includes a stop member, an elastic member, a guide member, and a locking member; the locking member is located on the outside of the fixed tube, and the stop member and the elastic member are located on the inside of the fixed tube; one end of the guide member is threaded to the locking member, and the other end passes through the fixed tube and the elastic member in sequence, and is connected to the stop member.

6. The single-column wind-resistant and shock-absorbing sign bracket according to claim 5, characterized in that: The side of the abutment member facing the friction damper member is a curved surface, and the curvature of the curved surface is equal to the curvature of the outer surface of the friction damper member.

7. The single-column wind-resistant and shock-absorbing sign bracket according to claim 1 or 6, characterized in that: The pre-tightening adjustment structure is evenly arranged along the circumference of the fixed tube.

8. The single-column wind-resistant and shock-absorbing sign bracket according to claim 1, characterized in that: The damping energy dissipation section is further provided with a first limiting block, a second limiting block, and a third limiting block located at the same height. The first limiting block is symmetrically arranged on the outer wall of the movable tube along a first radial line, the second limiting block is symmetrically arranged on the inner wall of the fixed tube along a second radial line, and the third limiting block is symmetrically arranged on the inner wall of the fixed tube along a third radial line. The second limiting block and the third limiting block extend to both sides of the first limiting block.

9. The single-column wind-resistant and shock-absorbing sign bracket according to claim 1, characterized in that: The outer wall of the movable tube is provided with a protective cover, which is located above the damping energy dissipation section and extends radially to the outside of the fixed tube.

10. The method of using the single-column wind-resistant and shock-absorbing sign bracket as described in any one of claims 1-9, characterized in that, Includes the following steps: Carry out basic construction and install fixed pipes; Install friction damping components at the bottom of the movable tube; The movable tube and the friction damping element are inserted into the fixed tube; Install shear pins; Adjust the preload force of the preload adjustment mechanism; Install the signage panel, and perform testing and inspection; If the shear pin breaks, replace the shear pin.

Images