Glass curtain wall mounting bolt

Abstract

The utility model belongs to the technical field of bolts, and discloses a glass curtain wall mounting bolt which comprises a bolt rod, the bolt rod is cylindrical and is provided with a first end and a second end in the length direction of the bolt rod, the outer surface of the bolt rod is provided with threads, the threads extend to the position close to the first end from the second end, and the first end and the second end of the bolt rod are connected. A smooth section is arranged at the position, close to the first end, of the second end, and the length of the smooth section is 15%-20% of the total length of the second end. According to the glass curtain wall mounting bolt, due to the chamfer design of the joint of the bolt head and the bolt rod, the arrangement of the limiting table and the chamfer design of the limiting table, stress is effectively dispersed, the stress concentration phenomenon is avoided, the stability and reliability of the overall structure of the bolt are enhanced, the mechanical property of the bolt is improved, and the service life of the bolt is prolonged. The installation position of the glass curtain wall can be accurately controlled, the sealing performance of the curtain wall is guaranteed, the energy-saving effect and the appearance quality of a building are improved, and the problems of water leakage, air leakage and the like caused by installation position deviation are solved.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, specifically a glass curtain wall mounting bolt. Background Technology

[0002] In today's construction industry, glass curtain walls are widely used in various high-rise and large commercial buildings due to their unique aesthetic effects, excellent lighting performance, and superior thermal insulation properties, becoming an important element of modern architectural design. However, the safety and stability of glass curtain walls largely depend on the performance of the mounting bolts, a key connecting component. With the accelerated pace of urbanization, building heights are constantly breaking records, and building structures are becoming increasingly complex and diverse. This makes the working conditions faced by glass curtain walls increasingly harsh, raising the requirements for mounting bolts to unprecedented levels. From the perspective of existing technology, traditional glass curtain wall mounting bolts have a series of significant problems. In terms of material selection, a large number of traditional mounting bolts use ordinary carbon steel as raw material. The tensile strength of this material is relatively limited, usually failing to reach 800MPa. The high strength standards mentioned above, in practical applications, especially in high-rise and super high-rise buildings, require glass curtain walls to withstand enormous wind loads, their own weight, and strong impacts from extreme conditions such as earthquakes. Ordinary carbon steel mounting bolts often fall short under these high-intensity external forces, easily exhibiting tensile deformation or even breakage, thus posing a serious threat to the overall safety of the glass curtain wall. In terms of structural design, the connection between the head and rod of traditional mounting bolts is relatively simple, lacking effective stress dispersion design. This leads to significant stress concentration when the bolts are under load, easily causing cracks at the connection points, thereby affecting the bolt's service life and reliability. Furthermore, the limiting structure of traditional bolts... The structural design is not precise and stable enough. During long-term use, it may shift due to factors such as vibration and temperature changes, causing deviations in the installation position of the glass curtain wall. This affects the sealing performance and overall aesthetics of the curtain wall. From the perspective of installation convenience, the thread design and end shape of traditional bolts do not fully consider the actual operational needs of the construction site. For example, in narrow installation spaces, the installation of traditional bolts often requires a lot of time and manpower. Moreover, due to the lack of an effective guiding structure at the end, it is easy for them to deviate when screwed into the bolt hole, which not only increases the installation difficulty but may also damage the bolt hole, reducing installation efficiency and quality. In addition, in terms of durability, the surface protection measures of traditional mounting bolts are relatively rudimentary. Generally, only simple galvanizing is used. This protective layer is easily corroded by rainwater, ultraviolet rays, and atmospheric pollutants when exposed to harsh outdoor environments for a long time, leading to rust and corrosion of the bolts, gradually reducing their mechanical properties, shortening their service life, and increasing building maintenance costs and safety risks. Utility Model Content

[0003] The purpose of this utility model is to provide a glass curtain wall mounting bolt to solve the problems of insufficient strength, ease of installation and durability mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a glass curtain wall mounting bolt, comprising: a bolt rod, the bolt rod being cylindrical and having a first end and a second end along the length direction of the bolt rod, the outer surface of the bolt rod being provided with threads, the threads extending from the second end to a position near the first end, and the second end having a smooth section near the first end, the length of the smooth section being 15%-20% of the total length of the second end;

[0005] A bolt head is provided at the first end of the bolt shank. The bolt head is disc-shaped, and the connection between the bolt head and the first end is chamfered. The diameter of the bolt head is 1.5-2.5 times the diameter of the bolt shank. The outer surface of the bolt head is provided with anti-slip texture.

[0006] A limiting platform is fixedly installed on the smooth section of the bolt rod. The limiting platform is disc-shaped, and the connection between the limiting platform and the first end is chamfered. The outer surface of the limiting platform is provided with an anti-corrosion coating.

[0007] Preferably, the second end of the bolt rod is provided with a tapered guide portion, the tapered guide portion having a taper of 30-45 degrees.

[0008] By adopting the above technical solution, the tapered guide can play a good guiding role during the bolt installation process, making it easy for the bolt to be inserted into the installation hole, reducing scratches and damage to the hole wall, and improving installation efficiency. Especially when installing glass curtain wall mounting bolts in batches, it can effectively save time and labor costs. Furthermore, the appropriate taper range ensures the stability and reliability of its guiding function, taking into account both the convenience of processing technology and the requirements of structural strength.

[0009] Preferably, the anti-slip texture is a cross-shaped mesh pattern with a texture depth of 0.3-0.5mm.

[0010] By adopting the above technical solution, the cross-shaped anti-slip texture can significantly increase the friction between the bolt head and the installation tool, effectively preventing slippage when tightening or loosening the bolt, ensuring the accuracy and safety of the operation. The texture depth provides sufficient anti-slip effect without causing stress concentration or excessive processing difficulty due to excessive texture depth, thus ensuring the overall strength and service life of the bolt head.

[0011] Preferably, the anti-corrosion coating on the surface of the limiting platform is a fluorocarbon coating with a thickness of 20-30 μm.

[0012] Using the above technical solution, the fluorocarbon coating has excellent weather resistance, corrosion resistance and chemical stability, which can effectively resist various corrosive factors in the environment where the glass curtain wall is located, such as rainwater, ultraviolet rays and atmospheric pollutants, prevent the limit platform from rusting and corroding, thereby ensuring the overall structural integrity and stability of the bolts and extending their service life. The coating thickness ensures the anti-corrosion effect while avoiding increased costs or quality problems such as coating peeling due to excessive coating thickness.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the glass curtain wall mounting bolts:

[0014] 1. The chamfer design at the connection between the bolt head and the bolt shank, as well as the setting and chamfer design of the limiting platform, effectively disperse stress, avoid stress concentration, and enhance the stability and reliability of the overall bolt structure. This not only helps to improve the mechanical properties of the bolt, but also precisely controls the installation position of the glass curtain wall, ensures the sealing performance of the curtain wall, improves the energy-saving effect and appearance quality of the building, and prevents problems such as water leakage and air leakage caused by installation position deviation.

[0015] 2. The high-strength alloy steel used in the bolt rods can withstand the forces on the glass curtain wall under various complex working conditions, such as strong wind loads on high-rise buildings, seismic forces, and the weight of the curtain wall itself. This greatly reduces the risk of bolt tensile deformation and breakage, ensuring the stable installation and long-term safe use of the glass curtain wall, and reducing safety hazards such as loosening and falling off of curtain wall panels due to bolt failure.

[0016] 3. The tapered guide at the second end of the bolt rod makes it easier to align the bolt with the bolt hole and screw it in smoothly, especially in narrow installation spaces. This greatly reduces installation difficulty and time, improves construction efficiency, and reduces the possibility of damage to the bolt hole due to improper installation. This ensures installation quality and reduces labor costs and construction cycle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0018] Figure 2 This is a front view structural diagram of the overall blank state of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall front view of the present utility model.

[0020] In the diagram: 1. Bolt rod; 101. First end; 102. Second end; 103. Thread; 104. Smooth section; 105. Conical guide; 2. Bolt head; 201. Anti-slip texture; 3. Limiting platform. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-3 This utility model provides a technical solution: a glass curtain wall mounting bolt.

[0023] Example 1:

[0024] Material preparation: Select high-strength alloy steel bars with a tensile strength of 1250MPa. The diameter of the bars should be 2mm larger than the finished diameter of bolt rod 1 to allow for machining allowance.

[0025] Cold heading: The bar is placed into the cold heading machine mold. The pressure of the cold heading machine is set to 800kN, so that one end of the bar is upset to form a bolt head 2. The diameter of the bolt head 2 is twice the diameter of the bolt rod 1, and the chamfer at the connection is 45 degrees. At the same time, a limiting platform 3 is upset at the other end of the bar. The dimensions of the limiting platform 3 meet the design requirements, and the chamfer at the connection between it and the first end 101 is 30 degrees.

[0026] Turning: A tapered guide 105 with a taper of 35 degrees is machined at the second end 102 of the bolt rod 1, and then a thread 103 is machined. The thread 103 extends from the second end 102 to a position close to the first end 101. The length of the smooth section 104 at the second end 102 close to the first end 101 is 18% of the total length of the second end 102. During the turning process, the pitch of the thread 103 is ensured to be 1.5 mm and the thread angle is 60 degrees, which meets the standard requirements.

[0027] Surface treatment: Cross-shaped anti-slip texture 201 is machined on the outer surface of the bolt head 2 with a texture depth of 0.4mm. The bolt is then subjected to surface strengthening treatment by shot peening. After that, a fluorocarbon coating is sprayed on the outer surface of the limiting platform 3 as an anti-corrosion coating with a coating thickness of 25μm to ensure that the coating is uniform, dense, and free from defects such as missed coating or bubbles.

[0028] test:

[0029] Visual inspection: The anti-slip texture 201 of the bolt head 2 is clear and complete, without burrs or defects; the anti-corrosion coating of the limiting platform 3 is uniform and consistent in color, without flow marks, bubbles or missed coating.

[0030] Dimensional measurement: Using calipers and micrometers, the diameter of bolt rod 1 is 10mm with a tolerance of ±0.05mm and the length is 50mm with a tolerance of ±0.5mm. The diameter of bolt head 2 is 20mm with a tolerance of ±0.2mm. The diameter of limit platform 3 is 15mm with a tolerance of ±0.15mm and the thickness is 3mm with a tolerance of ±0.1mm. All of these are within the tolerance range required by the design.

[0031] Mechanical property testing: A universal testing machine was used for sampling and testing. Five samples were selected. The average tensile strength of the bolts was 1280 MPa, the yield strength was 1050 MPa, the elongation was 12%, and the impact toughness was 85 J / cm², which meets the performance requirements of high-strength alloy steel.

[0032] After passing inspection, the products enter the packaging and warehousing stage. The packaging uses rust-proof paper to wrap the products, and 10 bolts are put into a plastic box. The plastic boxes are then put into cardboard boxes and stored in a dry and ventilated environment. The warehouse temperature is controlled at 20℃-25℃ and the humidity is controlled at 40%-60%.

[0033] Example 2:

[0034] Material preparation: Select high-strength alloy steel bars with a tensile strength of 1300MPa. The diameter of the bars is 2.5mm larger than the finished diameter of bolt rod 1 as a machining allowance.

[0035] Cold heading: The bar is placed into the cold heading machine mold. The pressure of the cold heading machine is set to 900kN, so that one end of the bar is upset to form a bolt head 2. The diameter of the bolt head 2 is 2.2 times the diameter of the bolt rod 1. The chamfer at the connection is 50 degrees. At the same time, a limiting platform 3 is upset at the other end of the bar. The chamfer at the connection between the limiting platform 3 and the first end 101 is 35 degrees. The dimensions meet the design specifications.

[0036] Turning: A tapered guide 105 with a taper of 40 degrees is machined at the second end 102 of the bolt rod 1. Then, a thread 103 is machined. The thread 103 extends from the second end 102 to a position close to the first end 101. The length of the smooth section 104 at the second end 102 close to the first end 101 is 16% of the total length of the second end 102. During turning, ensure that the pitch of the thread 103 is 1.75 mm and the thread angle is 60 degrees, which meets the standard requirements.

[0037] Surface treatment: Cross-shaped anti-slip texture 201 is machined on the outer surface of the bolt head 2 with a texture depth of 0.45mm. The bolt is then subjected to surface strengthening treatment by shot peening. After that, a fluorocarbon coating is sprayed on the outer surface of the limiting platform 3 as an anti-corrosion coating with a coating thickness of 28μm to ensure that the coating is uniform and free from omissions, bubbles, etc.

[0038] test:

[0039] Visual inspection: The anti-slip texture 201 of the bolt head 2 is clear and neat, without any breakage or deformation; the anti-corrosion coating of the limit platform 3 is smooth and flat, without any particulate impurities or peeling.

[0040] Dimensional Measurement: After precise measurement, the diameter of bolt rod 1 is 12mm with a tolerance of ±0.06mm, the length is 60mm with a tolerance of ±0.6mm, the diameter of bolt head 2 is 26.4mm with a tolerance of ±0.25mm, the diameter of limit platform 3 is 18mm with a tolerance of ±0.2mm, and the thickness is 4mm with a tolerance of ±0.12mm. All dimensions meet the design tolerance requirements.

[0041] Mechanical performance testing: Eight bolts were randomly selected for mechanical performance testing. The average tensile strength was 1320 MPa, the yield strength was 1100 MPa, the elongation was 13%, and the impact toughness was 80 J / cm². All mechanical performance indicators were good and met the performance standards of high-strength alloy steel.

[0042] Qualified bolts are packaged and stored. The packaging method involves first sealing them in vapor phase rust-preventive bags, with eight bolts per bag. These bags are then placed in wooden crates lined with moisture-proof paper. The warehouse maintains a constant temperature and humidity: temperature between 18℃ and 22℃, and humidity between 35% and 50%. For defective bolts, an "X" is marked on the head with red paint, and they are placed separately in the defective products area. The reasons for non-conformity are recorded in detail, such as dimensional deviations, appearance defects, or substandard mechanical properties. Corresponding corrective measures are taken for different reasons, such as adjusting processing parameters, replacing molds, or strengthening raw material inspection.

[0043] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and do not limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. A glass curtain wall mounting bolt, characterized by, The utility model relates to a bolt rod (1) is cylindrical, and has first end (101) and second end (102) along bolt rod (1) length direction, the outer surface of bolt rod (1) is equipped with thread (103), thread (103) extends from second end (102) to near first end (101) position, and second end (102) near first end (101) is equipped with smooth section (104), the length of smooth section (104) is 15%-20% of second end (102) total length; Bolt head (2) is arranged at first end (101) of bolt rod (1), bolt head (2) is discoid, and the junction of bolt head (2) and first end (101) is chamfered design, and the diameter of bolt head (2) is 1.5-2.5 times of bolt rod (1) diameter, the outer surface of bolt head (2) is equipped with antiskid line (201); Limiting table (3) is fixedly arranged on smooth section (104) of bolt rod (1), limiting table (3) is discoid, and the junction of limiting table (3) and first end (101) is chamfered design, the outer surface of limiting table (3) is equipped with anticorrosive coating. Second end (102) of bolt rod (1) is equipped with conical guide portion (105), the taper of conical guide portion (105) is 30-45 degrees.

2. The glass curtain wall mounting bolt according to claim 1, characterized in that: Antiskid line (201) is cross netted line, and the depth of line is 0.3-0.5mm.

3. The glass curtain wall mounting bolt according to claim 1, characterized in that: The anticorrosive coating of the surface of limiting table (3) is fluorocarbon coating, and the thickness of anticorrosive coating is 20-30mu m.

4. The glass curtain wall mounting bolt according to claim 1, characterized in that: ​

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