Freely telescopic device for compensating temperature stress of stainless steel roof

Abstract

The invention relates to the technical field of stainless steel roofs, in particular to a freely telescopic device for compensating temperature stress of a stainless steel roof.The freely telescopic device comprises a metal profile base and a metal sliding piece, the metal sliding piece is in embedded sliding connection with the metal profile base, a through long groove is formed in the metal profile base, and the metal sliding piece can freely slide along the through long groove; the insulation pad is arranged below the metal profile base and used for isolating direct contact between the metal profile base and the roof structure; the elastic positioning block is used for limiting the sliding range of the metal sliding sheet on the metal profile base; a fixing structure connected with a stainless steel roof panel is arranged at the top of the metal slip sheet; the key technical bottlenecks of the ultra-long stainless steel metal roof in the aspects of temperature deformation, connection reliability and durability are systematically overcome through sliding stress release, mechanical looseness prevention and insulation corrosion prevention, and the ultra-long stainless steel metal roof has outstanding practicability, safety and long-term effectiveness.

Description

A freely expandable device for compensating for temperature stress in stainless steel roofs Technical Field

[0001] This invention relates to the field of stainless steel roofing technology, and in particular to a freely expandable device for compensating for temperature stress in stainless steel roofs. Background Technology

[0002] Stainless steel roofing systems are widely used in modern large-scale public buildings due to their excellent corrosion resistance, durability, and aesthetics. With the continuous increase in building span and roof length, the use of extra-long stainless steel roof panels is becoming increasingly common. These roofing systems typically employ continuous welding processes to achieve overall waterproofing and structural stability, representing an important technical field in building structure and construction technology.

[0003] However, extra-long stainless steel roof panels experience significant thermal expansion and contraction under temperature changes. In environments with large temperature differences, this results in cumulative longitudinal expansion and contraction. In traditional fixed support structures, there is a lack of effective expansion and contraction compensation mechanisms between the roof panel and the support. Long-term repeated friction leads to wear at the interlocking joints of the panel ribs and damage to the coating, thereby affecting the overall waterproofing and wind uplift resistance of the roof system and even causing structural safety hazards. Furthermore, in coastal or high-humidity environments, stainless steel is prone to electrochemical corrosion when in direct contact with other metal materials (such as carbon steel supports), further weakening the durability of the roof system. While current common support structures can meet the requirements of roofs of general length, they still fall short in terms of temperature stress release, friction control, corrosion resistance, and insulation for extra-long roofs.

[0004] Based on this, a freely expandable device for compensating for temperature stress on stainless steel roofs is proposed. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a freely expandable device for compensating for temperature stress in stainless steel roofs.

[0006] The technical solution for achieving the objective of this invention is: a freely expandable device for compensating for temperature stress on stainless steel roofs, comprising a metal profile base, and further comprising:

[0007] A metal slider is slidably connected to the metal profile base. The metal profile base has a continuous groove, and the metal slider can slide freely along the continuous groove.

[0008] An insulating pad is disposed below the metal profile base to prevent direct contact between the metal profile base and the roof structure.

[0009] An elastic positioning block is used to limit the sliding range of the metal slider on the metal profile base;

[0010] The top of the metal slide is provided with a fixing structure for connecting to the stainless steel roof panel.

[0011] Preferably, the upper surface of the metal profile base is fixedly connected with multiple fixing hoops, and the inner walls of the multiple fixing hoops are all fixedly connected with ratchet rings.

[0012] Preferably, both the insulating base and the metal profile base are provided with multiple bolts, the top of each of the multiple bolts is provided with a groove, and the inner wall of each of the multiple grooves is slidably provided with a rib.

[0013] Preferably, the inner walls of the multiple sliding grooves are provided with multiple limiting grooves, and the inner walls of the multiple limiting grooves are respectively adapted to slide and connect with the surface of the prism rod.

[0014] Preferably, a spring is fixedly connected to the bottom end of the rib, and the bottom end of the spring is fixedly connected to the inner bottom wall of the slide groove, and the spring is disposed inside the slide groove.

[0015] Preferably, a drive head is fixedly connected to the top of the rib, and an annular groove is formed on the surface of the drive head. A pawl is rotatably provided on the inner wall of the annular groove, and the pawl engages with a ratchet ring.

[0016] Preferably, a coil spring shaft is fixedly installed on the inner wall of the annular groove, and the pawl is fixedly installed on the surface of the coil spring shaft.

[0017] Preferably, the pawl always tends to engage with the ratchet ring under the action of the coil spring shaft, achieving one-way self-locking, and the anti-loosening mechanism automatically locks when the bolt is subjected to vibration or reverse force to prevent loosening.

[0018] The significant advantages of this invention compared to existing technologies are:

[0019] Firstly, this invention utilizes a unique design with an embedded sliding connection between metal sliding plates and a metal profile base, providing a linear and free expansion and contraction path for extra-long stainless steel roof panels. This smoothly and with low friction compensates for the significant thermal expansion and contraction caused by temperature differences, fundamentally avoiding the repeated friction and wear of the rib locks at traditional fixed supports. This not only protects the integrity of the roof panel coating and maintains its long-term waterproof performance but also eliminates structural safety hazards caused by accumulated temperature stress, greatly extending the overall service life and reliability of the roofing system.

[0020] Secondly, this invention achieves one-way self-locking after the bolts are tightened, forming a mechanical safety barrier. Under repeated vibration, impact, or stress, this structure effectively prevents the bolts from loosening and ensures the long-term stability of the connections between the metal sliding plate and the roof panel, as well as the various components of the support itself. This feature greatly improves the reliability and safety of the roof system, especially in typhoon-prone areas or vibration environments, reducing maintenance requirements.

[0021] Thirdly, by setting an insulating pad under the metal profile base, the present invention effectively isolates the direct contact between the stainless steel roof panel support and the lower carbon steel support structure, fundamentally preventing electrochemical corrosion that is prone to occur in harsh environments such as coastal areas and high humidity, and protecting the structural strength; the insulating pad reduces the heat conduction path formed by the metal support, which helps to improve the thermal insulation performance of the building envelope and enhance the building's energy efficiency. Attached Figure Description

[0022] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 is a schematic diagram of the main view structure provided by the present invention;

[0024] Figure 2 is a schematic diagram of the three-dimensional cross-sectional structure provided by the present invention;

[0025] Figure 3 is a schematic diagram of the cross-sectional structure of the combined support provided by the present invention;

[0026] Figure 4 is a schematic diagram of the metal profile base structure provided by the present invention;

[0027] Figure 5 is a schematic diagram of the anti-loosening fixing structure provided by the present invention;

[0028] Figure 6 is a schematic diagram of the anti-loosening and fixing explosion structure provided by the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Metal profile base; 2. Metal slider; 3. Insulating pad; 4. Elastic positioning block; 5. Bolt; 6. Continuous groove; 7. Fixing hoop; 8. Ratchet ring; 9. Drive head; 10. Slide groove; 11. Spring; 12. Rib; 13. Limiting groove; 14. Annular groove; 15. Coil spring shaft; 16. Pawl. Detailed Implementation

[0031] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] This invention provides an improved, freely expandable device for compensating for temperature stress in stainless steel roofs. The technical solution of this invention is as follows:

[0033] As shown in Figures 1-6, a freely expandable device for compensating for temperature stress on stainless steel roofs includes a metal profile base 1, serving as the load-bearing and guiding foundation for the entire device. Its main body has one or multiple parallel, continuous grooves 6, preferably with a "T" or "dovetail" shaped cross-section, to embed and constrain metal sliding pieces 2, preventing them from vertically dislodging. The lower part of the base is designed with mounting holes for connection to the lower structure, and also includes:

[0034] The metal slider 2 serves as a sliding component directly fixed to the roof panel. Its lower part is equipped with a slider that matches the continuous groove 6, allowing it to slide freely and linearly within the groove. The top is equipped with a fixing structure, such as pre-drilled bolt holes or an integrally formed clamp interface. The metal slider 2 is embedded in and slidably connected to the metal profile base 1, which has a continuous groove 6 along which the metal slider 2 can slide freely.

[0035] Insulating pad 3 is placed between the metal profile base 1 and the roof purlins or supporting structure. Its main functions are threefold: electrical insulation to prevent electrochemical corrosion between different metals; thermal insulation to block cold bridges; and stress distribution and fine-tuning. The insulating pad 3 is positioned below the metal profile base 1 to isolate the metal profile base 1 from direct contact with the roof structure.

[0036] The elastic positioning block 4 is installed at both ends of the elongated groove 6 or in a pre-set slot. Its function is not rigid limiting, but to provide buffering and resettable limiting. When the metal slider 2 slides to the end of its stroke due to temperature changes, the elastic positioning block 4 absorbs the impact through its own deformation, and causes the slider to rebound when the temperature changes in the opposite direction, avoiding noise or damage from hard collisions, and preventing the slider from accidentally slipping off in extreme cases. The elastic positioning block 4 is used to limit the sliding range of the metal slider 2 on the metal profile base 1.

[0037] The top of the metal slide 2 is provided with a fixing structure for connecting to the stainless steel roof panel.

[0038] As shown in Figures 4 and 5, multiple fixing hoops 7 are fixedly connected to the upper surface of the metal profile base 1, and ratchet rings 8 are fixedly connected to the inner walls of the multiple fixing hoops 7.

[0039] Both the insulating base and the metal profile base 1 are provided with multiple bolts 5, and each of the multiple bolts 5 has a groove 10 at its top. Each of the multiple grooves 10 has a slidable rib 12 on its inner wall.

[0040] Multiple sliding grooves 10 have multiple limiting grooves 13 on their inner walls, and the inner walls of the multiple limiting grooves 13 are respectively adapted to slide and connect with the surface of the prism rod 12.

[0041] A spring 11 is fixedly connected to the bottom end of the rib 12. It is made of high-quality spring steel to provide stable and long-lasting axial elastic force. The bottom end of the spring 11 is fixedly connected to the inner bottom wall of the slide groove 10. The spring 11 is set inside the slide groove 10.

[0042] As shown in Figures 5 and 6, a drive head 9 is fixedly connected to the top of the rib 12. An annular groove 14 is formed on the surface of the drive head 9. A pawl 16 is rotatably provided on the inner wall of the annular groove 14. The pawl 16 meshes with the ratchet ring 8.

[0043] A coil spring shaft 15 is fixedly installed on the inner wall of the annular groove 14, and a small torsion spring 11 provides rotational torque for the pawl 16. It is necessary to ensure that the torque decay is small after long-term use. The pawl 16 is fixedly installed on the surface of the coil spring shaft 15.

[0044] The pawl 16, under the action of the coil spring shaft 15, always tends to engage with the ratchet ring 8, achieving one-way self-locking. The anti-loosening mechanism automatically locks when the bolt 5 is subjected to vibration or reverse force to prevent loosening.

[0045] The specific working method is as follows: First, according to the architectural design requirements, determine the installation position of the support on the roof purlins or supporting structure. Lay the insulating pad 3 in the predetermined position, and then place the metal profile base 1 on the insulating pad 3. Initially fix the metal profile base 1 with conventional fasteners. The insulating pad 3 can effectively isolate the metal profile base 1 from direct contact with the steel structure below, prevent electrochemical corrosion, and reduce thermal bridging effects.

[0046] The metal slider 2 is inserted into the elongated groove 6 of the metal profile base 1 from its end or side. The elastic positioning block 4 is installed at the end of the elongated groove 6 or in the pre-set slot to limit the maximum stroke of the metal slider 2 along the groove under the action of temperature difference and prevent it from slipping out;

[0047] Align the ribs of the stainless steel roof panel with the fixing structure at the top of the metal sliding plate 2. Secure the roof panel to the metal sliding plate 2 by tightening the fastening bolts 5 on the fixing clamp 7, thus completing the connection between the roof panel and the sliding support;

[0048] When it is necessary to tighten bolt 5, use a tool to rotate the drive head 9. The drive head 9 drives the fixed rib 12 to rotate. Since the rib 12 slides with the limiting groove 13 in the slide groove 10 at the top of bolt 5 through its prismatic surface, the torque is transmitted to the bolt 5 shank, causing it to be screwed into the threaded hole, thus achieving initial mechanical locking.

[0049] During the tightening process, the pawl 16 on the drive head 9, under the elastic force of the coil spring shaft 15, always maintains an outward opening, attempting to engage with the ratchet ring 8 on the inner wall of the fixing clamp 7. When the tightening action stops, the pawl 16 automatically falls into the tooth groove of the ratchet ring 8 under the force of the spring 11, achieving engagement. At this time, due to the unidirectional transmission characteristic of the ratchet and pawl 16, the drive head 9 cannot rotate in the opposite direction, forming a mechanical anti-loosening safety.

[0050] When the roof system is subjected to wind loads, vibrations, or repeated stresses due to temperature changes, the conventional bolt 5 connection is prone to loosening. In this device, any reverse torque that attempts to loosen the bolt 5 will immediately cause the pawl 16 to engage more firmly with the ratchet ring 8, thereby effectively preventing the bolt 5 from rotating and ensuring the long-term reliability of the connection.

[0051] When disassembly or adjustment is required, the operator presses the drive head 9 axially. The drive head 9 drives the rib 12 to compress the spring 11, causing the pawl 16 to disengage from the ratchet ring 8. While maintaining the pressed position, the operator can use a tool to rotate the drive head 9 in the opposite direction to loosen the bolt 5 connection.

[0052] When the ambient temperature rises, the stainless steel roof panel expands longitudinally, causing the metal sliding piece 2 fixed to it to slide outward within the continuous groove 6 of the metal profile base 1. When the ambient temperature drops, the roof panel contracts, and the metal sliding piece 2 slides inward. This sliding process is smooth and has low friction, thereby releasing the huge internal stress generated by temperature changes in the roof panel and avoiding frictional damage at the rib lock joints and potential safety hazards to the overall structure.

[0053] Throughout the entire process, the insulating pad 3 continuously provides insulation and corrosion protection; the elastic positioning block 4 ensures controllable sliding range; and the anti-loosening fixing structure guarantees the tightness of all critical connection points under long-term vibration and alternating loads. The entire device works in synergy to achieve effective and reliable compensation for temperature stress on ultra-long stainless steel roofs, significantly improving the waterproof durability, wind uplift resistance, and overall safety of the roofing system.

[0054] The technical means disclosed in this invention are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this invention are common knowledge to those skilled in the art.

Claims

1. A freely expandable device for compensating for temperature stress on stainless steel roofs, comprising a metal profile base (1), characterized in that, Also includes: Metal slider (2), the metal slider (2) is embedded in the metal profile base (1) and is slidably connected. The metal profile base (1) is provided with a through groove (6) and the metal slider (2) can slide freely along the through groove (6); insulating pad (3), the insulating pad (3) is provided below the metal profile base (1) and is used to isolate the direct contact between the metal profile base (1) and the roof structure; elastic positioning block (4), the elastic positioning block (4) is used to limit the sliding range of the metal slider (2) on the metal profile base (1); the top of the metal slider (2) is provided with a fixing structure for connecting with the stainless steel roof panel.

2. The freely expandable device for compensating for temperature stress in stainless steel roofs according to claim 1, characterized in that: The upper surface of the metal profile base (1) is fixedly connected with multiple fixing hoops (7), and the inner walls of the multiple fixing hoops (7) are all fixedly connected with ratchet rings (8).

3. The freely expandable device for compensating for temperature stress in stainless steel roofs according to claim 2, characterized in that: Multiple bolts (5) are provided on both the insulating base and the metal profile base (1). Each of the multiple bolts (5) has a groove (10) at its top end, and a rib (12) is slidably provided on the inner wall of each of the multiple grooves (10).

4. The freely expandable device for compensating for temperature stress in stainless steel roofs according to claim 3, characterized in that: The inner walls of the multiple sliding grooves (10) are provided with multiple limiting grooves (13), and the inner walls of the multiple limiting grooves (13) are respectively adapted to slide and connect with the surface of the prism rod (12).

5. The freely expandable device for compensating for temperature stress in stainless steel roofs according to claim 4, characterized in that: A spring (11) is fixedly connected to the bottom end of the prism (12). The bottom end of the spring (11) is fixedly connected to the inner bottom wall of the slide groove (10). The spring (11) is located inside the slide groove (10).

6. The freely expandable device for compensating for temperature stress in stainless steel roofs according to claim 5, characterized in that: The top end of the rib (12) is fixedly connected to a drive head (9), and the surface of the drive head (9) is provided with an annular groove (14). The inner wall of the annular groove (14) is rotatably provided with a pawl (16), and the pawl (16) meshes with the ratchet ring (8).

7. A freely expandable device for compensating for temperature stress in stainless steel roofs according to claim 6, characterized in that: The inner wall of the annular groove (14) is fixedly installed with a coil spring shaft (15), and the pawl (16) is fixedly installed on the surface of the coil spring shaft (15).

8. The freely expandable device for compensating for temperature stress in stainless steel roofs according to claim 7, characterized in that: The pawl (16) always tends to engage with the ratchet ring (8) under the action of the coil spring shaft (15), realizing one-way self-locking. The anti-loosening mechanism automatically locks when the bolt (5) is subjected to vibration or reverse force to prevent loosening.

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