Width-adjustable and recyclable wet joint protection cover plate

Abstract

The utility model discloses a width-adjustable and recyclable wet joint protective cover plate which is characterized by comprising two main steel plates which are oppositely arranged up and down, two hollow beam plates are clamped between the two main steel plates, and the two hollow beam plates are spaced by a certain distance to form a wet joint. A plurality of parallel long-strip-shaped adjustable seams are formed in the surface of the main steel plate in the length direction, and the length direction of the adjustable seams is consistent with the width direction of the main steel plate. And the slidable fastening assembly is movably arranged in the adjustable seam and moves in the length direction of the adjustable seam, and the slidable fastening assembly is connected with the two main body steel plates. According to the wet joint protection cover plate, through the design of the adjustable joints and the sliding fastening assemblies, the width of the cover plate can be flexibly adjusted, the wet joint protection cover plate can meet the requirements of wet joints of different sizes, the application range is remarkably widened, and the use efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of wet joint protective covers. More specifically, this utility model relates to a wet joint protective cover that is adjustable in width and recyclable. Background Technology

[0002] Traditional protective covers present several technical problems in the construction of wet joints in bridge and building engineering. First, existing covers typically use a fixed width design, which cannot accommodate wet joints of varying sizes. When the joint width changes, the construction team must replace or customize the covers, leading to material waste and reduced construction efficiency. This limitation stems from the rigid design of the cover structure, lacking an adjustable mechanism. Second, traditional covers are mostly fixed by welding or one-time bolt connections, which are difficult to disassemble and prone to damage. Since wet joint construction is a temporary project, this irreversible connection method makes it difficult to reuse the covers. Furthermore, under vibration or load, ordinary bolt connections are prone to loosening, requiring frequent inspection and tightening, increasing maintenance costs.

[0003] To address these issues, the industry has attempted to adopt a split design or add adjustment holes, but these often face difficulties due to insufficient structural strength or inadequate adjustment precision. How to achieve adjustable width, reliable connection, and easy assembly / disassembly while ensuring load-bearing capacity has always been a challenging problem to be solved in wet joint protection technology. Utility Model Content

[0004] In the construction of wet joints in bridges or buildings, traditional protective covers are difficult to adapt to joints of different widths, and their single fixing method leads to cumbersome installation, poor versatility, and inability to be recycled, resulting in resource waste. In addition, existing covers lack adjustment functions, making it difficult to fit tightly to hollow beams and slabs, which can easily create safety hazards.

[0005] To address the above problems, this utility model provides an adjustable-width and recyclable wet joint protective cover. Two main steel plates are arranged opposite each other, and two hollow beam plates are sandwiched between the two main steel plates, with a certain distance between the two hollow beam plates to form a wet joint. Multiple parallel, elongated adjustable seams are arranged along the length direction of the main steel plates, and the length direction of the adjustable seams is consistent with the width direction of the main steel plates. Sliding fastening components are movably disposed in the adjustable seams, moving along the length direction of the adjustable seams, and the sliding fastening components are respectively connected to the two main steel plates.

[0006] The adjustable seam and sliding fastening components allow the cover plate width to be flexibly adjusted according to the actual size of the wet joint, significantly expanding its applicability. The clamping structure between the main steel plate and the hollow beam enhances overall stability, preventing cover plate displacement or detachment. The sliding fastening components simplify the installation process, facilitating quick disassembly and reuse, and reducing construction costs. The elongated adjustable seam provides multiple bolt fixing points, ensuring a tight fit between the cover plate and the beam, improving safety and durability.

[0007] Preferably, the lower main steel plate of this utility model is divided into two pieces, and the two pieces are separated by a certain distance. They are vertically connected with bolts and the upper main steel plate to form an L-shaped structure, which is used to hold the bottom of the hollow beam plate.

[0008] The L-shaped structure, through the vertical connection of a split lower steel plate and bolts, forms a stable bottom support, effectively preventing displacement or subsidence of the hollow beam slab. The segmented design facilitates adaptation to differences in beam slab dimensions while reducing material usage. The mechanical properties of the L-shaped structure are superior to those of a flat cover plate, distributing load pressure and reducing the risk of localized deformation. Installation only requires adjusting the bolt positions to complete the fixation, significantly improving construction efficiency.

[0009] Preferably, the sliding fastening assembly of this utility model includes bolts, washers, and nuts. The bolts are inserted into the adjustable slots, with at least two bolts in each row of adjustable slots. A washer is installed at the bottom of each bolt. After the bolt is inserted into the main steel plate, another washer is installed, and a nut is screwed in above the washer. The nut remains in a loose state during adjustment.

[0010] Sliding bolts can move freely within adjustable joints, allowing for stepless adjustment to accommodate different joint widths. A double-washer design enhances contact surface friction, preventing bolt slippage. The nut's relaxed state facilitates quick position adjustments during construction, while tightening creates a secure connection. Multiple bolts distribute stress, preventing localized stress concentration and extending the cover plate's lifespan.

[0011] Preferably, the contact surface between the hollow beam plate and the main steel plate of this utility model is provided with an elastic buffer layer, the thickness of which is 5-10mm and the surface is provided with anti-slip texture.

[0012] The elastic buffer layer absorbs the impact energy between the beam and the cover plate, reducing metal wear and noise pollution. Anti-slip textures increase the coefficient of friction, preventing the cover plate from shifting under load. A thickness of 5-10mm balances buffering performance with structural compactness, avoiding excessive compression that could affect stability. This design is particularly suitable for high-frequency vibration environments, such as bridge construction scenarios.

[0013] Preferably, the gasket of this utility model is a serrated anti-loosening gasket, and its lower surface is provided with a serrated structure that engages with the adjustable seam edge of the main steel plate surface.

[0014] The serrated structure and adjustable seam edge interlock mechanically, completely preventing gasket slippage. Disassembly is simple: just rotate the nut in the opposite direction to separate the gasket without damaging the steel plate surface, facilitating reuse. This design eliminates the need for additional anti-loosening adhesive or tools, simplifying maintenance and making it particularly suitable for temporary projects requiring frequent disassembly and reassembly.

[0015] Preferably, the nut of this invention is a nylon self-locking nut, and a spring washer is added between the nut and the washer to form a triple anti-loosening structure.

[0016] The nylon self-locking nut generates radial pressure through an embedded nylon ring, achieving initial anti-loosening; the spring washer provides axial elastic support, compensating for preload loss caused by vibration; and the serrated washer acts as a third layer of protection. This triple-structure synergistic effect significantly improves vibration resistance, making it suitable for harsh environments such as heavy machinery or elevated bridges.

[0017] Preferably, the separation area of ​​the two main steel plates at the bottom of this utility model is provided with a foldable support net, which is composed of hinged metal rods and can be unfolded to form a temporary working platform.

[0018] The foldable support net can be stored under the cover plate when no platform is needed, saving space; when unfolded, it forms a stable plane through hinged links, providing a place for workers to stand or place tools. This highly integrated design requires no additional equipment, significantly reducing auxiliary work time, and is especially suitable for narrow or high-altitude work scenarios.

[0019] This utility model has at least the following beneficial effects: The beneficial effects of the wet joint protective cover of this utility model are mainly reflected in three aspects: First, through the design of adjustable seams and sliding fastening components, the width of the cover can be flexibly adjusted, which can adapt to the needs of wet joints of different sizes, significantly improving the scope of application and efficiency of use; Second, the L-shaped structure and split steel plate design enhance the overall stability and support capacity, effectively preventing the cover from shifting or falling off; Third, through innovative designs such as triple anti-loosening structure and elastic buffer layer, the reliability of the connection is ensured, noise and wear are reduced, and service life is extended.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the adjustable-width and recyclable wet joint protective cover plate of this utility model.

[0022] Figure 2 This is a cross-sectional view of the adjustable-width and recyclable wet joint protective cover plate of this utility model. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0025] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0026] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0027] like Figure 1-2 As shown, a preferred embodiment of this utility model provides an adjustable-width and recyclable wet joint protective cover. Two main steel plates 1 are arranged vertically opposite each other, and can be made of Q235B or Q345B steel with a thickness of 6-12mm. Multiple parallel, elongated adjustable slits 2 are formed along the length of the main steel plates 1. The width of each adjustable slit 2 is 10-15mm, and its length direction is consistent with the width direction of the main steel plates 1. The spacing of the adjustable slits 2 can be set to 200-300mm to facilitate bolt adjustment. Two hollow beam plates 3 are sandwiched between the two main steel plates 1. The hollow beam plates 3 can be precast concrete beams or steel beams, with a width of 300-600mm. The two beams are spaced 100-300mm apart to form a wet joint 5.

[0028] The sliding fastening assembly 4 can use M12 or M16 bolts, along with standard washers and nuts, to move along the adjustable seam. The bolts remain slack during adjustment, facilitating the adjustment of the cover plate width. The edges of the main steel plate can be fitted with flanges to enhance rigidity and prevent deformation.

[0029] This structure can adapt to wet joints of different widths, is easy to adjust, and the main steel plate can be reused, reducing material waste.

[0030] In another technical solution, the lower main steel plate is divided into two pieces, each 150-250mm wide, with a 50-150mm gap between them to accommodate different beam sizes. The lower and upper steel plates are vertically connected by bolts to form an L-shaped structure, which can be fixed with M10 or M12 bolts. Reinforcing ribs can be welded at the corners of the L-shaped structure to improve load-bearing capacity.

[0031] Rubber pads can be installed on the inner side of the lower steel plate to prevent scratching the bottom of the hollow beam slab. The vertical connection method of the L-shaped structure can effectively hold the hollow beam slab, preventing it from slipping or sinking and improving overall stability.

[0032] This design facilitates installation and disassembly while enhancing the support capacity of the cover plate, making it suitable for hollow beams of different sizes.

[0033] In another technical solution, the sliding fastening assembly 4 includes a bolt 4-1, a washer 4-2, and a nut 4-3. The bolt can be a high-strength bolt of grade 8.8 or 10.9. The washer can be a serrated anti-loosening washer with a serration spacing of 1-2mm, which engages with the edge of the adjustable slot to prevent slippage. The nut can be a nylon self-locking nut, and a spring washer is added between the nut and the washer to form a triple anti-loosening structure.

[0034] At least two bolts are installed in each row of adjustable joints, spaced 300-500mm apart, to ensure even stress distribution. The bolts are kept loose during the adjustment phase to facilitate position adjustment, and are finally tightened to form a stable connection.

[0035] This fastening method effectively prevents bolts from loosening, improves the stability of the cover plate in a vibration environment, and facilitates repeated disassembly and assembly.

[0036] In another technical solution, a 5-10mm thick rubber or polyurethane elastic buffer layer can be set on the contact surface between the hollow beam slab and the main steel plate. The surface of the buffer layer can be processed with anti-slip texture, with a texture depth of 1-3mm, to improve the coefficient of friction.

[0037] A foldable support mesh can be installed in the separation area between the two main steel plates below. The support mesh is composed of hinged 304 stainless steel rods with a diameter of 8-12mm. When unfolded, it can form a temporary working platform with a width of 400-600mm. The support mesh can be folded and stored when not in use without affecting the normal function of the cover plate.

[0038] This design reduces noise and wear from metal contact while providing a temporary work platform to improve ease of construction.

[0039] In another technical solution, the gasket can be made of 65Mn spring steel or stainless steel, with a thickness of 2-4mm. The lower surface is machined with a serrated structure, with a serration angle of 45-60 degrees and a tooth height of 0.5-1mm, forming a mechanical engagement with the edge of the adjustable slot. The inner diameter of the gasket is clearance-fitted with the bolt shank, with a tolerance controlled within 0.1-0.3mm.

[0040] During installation, press the serrated side down against the steel plate surface, using bolt preload to embed the serrations into the micro-surface layer of the steel plate. For disassembly, simply rotate the nut in the reverse direction to separate the plate without damaging the steel substrate. Molybdenum disulfide lubricant can be used to reduce thread friction.

[0041] This structure effectively prevents the gasket from slipping due to vibration, while maintaining detachability and facilitating the reuse of the cover plate.

[0042] In another technical solution, the nylon self-locking nut can be made of NYLON66 material, with a nylon ring thickness of 1.5-2mm and an interference fit of 0.2-0.4mm. The spring washer is made of 70# carbon steel, with a free height of 6-8mm, and maintains an elastic stroke of 3-4mm after compression. When combined with the serrated washer, it forms a triple anti-loosening mechanism of axial elastic pressure, radial nylon resistance, and mechanical engagement.

[0043] During installation, assemble in the following order: gasket - steel plate - gasket - spring washer - nut. The initial preload torque should be controlled between 45-60 N·m. In vibration testing, the system did not exhibit any loosening within the 5-200 Hz frequency range.

[0044] This design is particularly suitable for scenarios with continuous vibration, such as bridges, and its anti-loosening effect is significantly better than that of traditional single-nut structures.

[0045] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An adjustable width and recyclable wet-seam cover, characterized by, include: Two main steel plates are arranged opposite each other, and two hollow beam plates are sandwiched between the two main steel plates. The two hollow beam plates are separated by a certain distance to form a wet joint. Multiple parallel long strip adjustable seams are arranged on the surface of the main steel plates along the length direction. The length direction of the adjustable seams is consistent with the width direction of the main steel plates. A sliding fastening assembly is movably disposed in the adjustable joint and moves along the length of the adjustable joint, and the sliding fastening assembly is respectively connected to two main steel plates.

2. The adjustable width and recyclable wet-seam protected cover sheet of claim 1, wherein, The sliding fastening assembly includes bolts, washers, and nuts. The bolts are inserted into the adjustable slots, with at least two bolts in each row of adjustable slots. A washer is installed at the bottom of each bolt. After the bolt is inserted into the main steel plate, another washer is installed, and a nut is screwed in above the washer.

3. The adjustable width and recyclable wet-seam protected cover sheet of claim 2, wherein, The lower main steel plate is divided into two pieces, which are separated by a certain distance. They are vertically connected with bolts and the upper main steel plate to form an L-shaped structure, which is used to hold the bottom of the hollow beam plate.

4. The adjustable width and recyclable wet-seam protected cover sheet of claim 1, wherein, An elastic buffer layer is provided on the contact surface between the hollow beam slab and the main steel plate. The thickness of the elastic buffer layer is 5-10mm, and the surface is provided with anti-slip texture.

5. The adjustable width and recyclable wet-seam protected cover sheet of claim 2, wherein, The gasket is a serrated anti-loosening gasket, and its lower surface is provided with a serrated structure that engages with the adjustable seam edge of the main steel plate surface.

6. The adjustable width and recyclable wet-seam protected cover sheet of claim 2, wherein, The nut is a nylon self-locking nut, and a spring washer is added between the nut and the washer to form a triple anti-loosening structure.

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