A zero-weld steel structure pipeline top pressure fixing device

Abstract

The utility model discloses a kind of zero-welded steel structure pipeline top pressure fixing devices, belong to building construction technical field.The device is composed of U-shaped groove, factory prewelding fixed nut and unilateral top pressure bolt:U-shaped groove is sat on steel beam surface, fixed nut is fully welded in groove side web outer surface to form thread seat;Fixed bolt penetrates nut and top pressure steel beam, realize pipeline free welding, free opening fast locking.Reversely loosening can integrally disassemble, reuse.U-shaped groove can be formed by cold bending with on-site scrap plate, adapt DN20-DN200 pipeline;Double nut is tight and prevents loosening, rubber pad can be added to reduce vibration and noise.No dynamic fire, no dust throughout, do not destroy steel beam fireproof coating, low cost, bare-handed operation, suitable for school, hospital, commercial and other steel structure surface external hanging cable, rainwater pipe and other light pipeline fast installation and high-frequency maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, specifically relating to a zero-welding steel structure pipe top pressure fixing device, used for the rapid installation and disassembly of externally mounted conduits, cables or small pipes on the surface of steel structures. Background Technology

[0002] Traditional methods for fixing pipes on steel structures often use welded brackets or clamps with through bolts, which have the following drawbacks: 1. On-site hot work and welding require approval. Heat input can damage the fireproof coating of the steel beam and the metallographic structure of the base material, easily inducing cracks. 2. Through bolts require drilling holes in the steel beam, which weakens the cross-sectional strength, and once the hole is drilled in the wrong position, it cannot be corrected. 3. Different pipe diameters require separate cutting and drilling, resulting in poor versatility and a large number of stock parts; 4. The demolition process requires cutting and grinding, which generates smoke, noise and waste, and does not meet the requirements of green construction.

[0003] In existing technologies, although there are ideas of using bolts for pressing, the nuts are usually brought to the site in loose parts. The U-shaped groove and the nut are not prefabricated to be connected. During installation, the nut is easy to rotate and difficult to position. In practice, spot welding is still required for positioning, and the problem of on-site hot work has not been truly eliminated.

[0004] Therefore, there is an urgent need for a top-pressure fixing device that allows for "factory pre-welded nuts, zero on-site hot work, no drilling required, quick disassembly by hand, and applicability to multiple pipe diameters" to achieve the goals of zero damage to the main steel structure, rapid installation, and reuse. Utility Model Content

[0005] This utility model aims to overcome the shortcomings of existing bolt-top-pressure solutions, such as the need for on-site spot welding for positioning, easy rotation of nuts, and cumbersome disassembly. It provides a top-pressure fixing device that features "factory pre-welded nuts, zero on-site hot work, easy disassembly and assembly by hand, applicability to multiple pipe diameters, and the ability to utilize on-site waste materials for immediate processing," thereby achieving the goals of zero damage to the main steel structure, rapid installation, reuse, and green construction.

[0006] To achieve the above objectives, this utility model is implemented as follows: A zero-welding steel structure pipe top-pressure fixing device, comprising: U-shaped grooves are used to sit on the surface of steel structures; A fixing nut is pre-welded to the outer surface of one side of the web of the U-shaped groove to form a non-rotatable threaded seat; The fixing bolt penetrates the fixing nut and presses against the surface of the steel structure, forming a unilateral pressing clamping force. The opening area of ​​the U-shaped groove forms a pipe accommodating space. The pipe is placed in the opening, and the fixing bolt end face is pressed against the steel structure by tightening the fixing nut, so that the pipe can be quickly fixed without welding or drilling. The entire pipe can be disassembled and reused by loosening the fixing nut in the opposite direction.

[0007] Furthermore, the U-shaped channel is cold-bent from construction waste steel plates, with a wall thickness of 2-6 mm, an opening of 50-200 mm, and a height of 40-100 mm, which can cover the entire series of pipelines from DN20 to DN200.

[0008] Furthermore, the bolts are M10-M20 fully threaded hexagonal bolts, with a length of 100-300 mm selectable; the top pressure end is a flat head or a hemispherical head and is heat-treated to ≥35 HRC to reduce local indentation.

[0009] Furthermore, a double-nut anti-loosening structure is adopted: the fixing nut adopts a double-nut tightening structure of "pre-positioning + final locking", which is resistant to vibration and loosening and does not require an additional locking washer.

[0010] Furthermore, high-precision pre-welding is adopted in the factory: the fillet weld between the nut and the U-shaped channel web is fully welded, with a weld height of ≥0.7 times the nut thickness. Welding is completed only in the factory or prefabrication site, and the on-site installation and disassembly process involves zero open flame and zero smoke.

[0011] Preferred vibration damping and noise reduction structure: A 2-4 mm elastic rubber pad can be added to the inside of the U-shaped groove opening to isolate pipe vibration, protect the anti-corrosion layer, and reduce rain impact noise.

[0012] This invention allows for single-handed operation: the contact area between the bolt's pressing end and the steel structure is ≥50 mm. 2 With a design tightening torque of ≤40 N·m, it can provide a lateral load of 1.0 kN, and workers can complete the installation or disassembly with a single wrench.

[0013] Compared with existing technologies, the zero-welding steel structure pipe top-pressure fixing device shown in this utility model has the following advantages and features: 1. Zero welding, zero openings, no damage to the fireproof coating and base material of the steel beam, meeting the requirements of green construction; 2. Factory pre-welded nuts, no need for on-site rotation or tack welding, installation time ≤ 1 min / point, disassembly time ≤ 30s / point; 3. The same U-shaped channel frame can cover pipes from DN20 to DN200, reducing inventory specifications by more than 80%; 4. Double nuts + elastic washers provide vibration resistance, noise reduction, and prevent loosening. Maintenance only requires loosening the bolts, with no cutting or grinding required and zero waste. 5. The entire process utilizes on-site scrap steel plates and standard bolts, resulting in extremely low material costs. Furthermore, the materials can be recycled more than 50 times, making them significantly more economical and environmentally friendly than traditional welded supports. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device.

[0015] Figure 2 This is a schematic diagram of the device in use. Detailed Implementation

[0016] The preferred embodiment of this utility model will be described in detail below with reference to the figures, taking a renovation project of an external rainwater pipe on a steel structure roof as an example. The roof is a hot-rolled H-beam (H300×200×8×12), requiring the installation of DN100 PVC rainwater pipes on both lower flanges, with a total length of approximately 120 m. The design lateral load is 1.0 kN / m, welding is prohibited, and installation must be completed quickly during holidays, allowing for repeated disassembly and maintenance later. The described embodiments are only used to help those skilled in the art reproduce this utility model and are not intended to limit its scope of protection.

[0017] I. Prefabrication of components and selection of materials, such as Figure 1 ; U-shaped groove 4 Material: On-site scrap Q235B steel plate, 4 mm thick, cold-bent; Dimensions: Opening width 120 mm (fits DN100 pipe outer diameter 114 mm), height 60 mm, length 150 mm; Processing: The two side webs are punched and blanked in one go, with a bottom arc radius of 55 mm, ensuring that the contact angle with the outer wall of the pipe is ≥60°.

[0018] Fixing nuts 2 and 3 Specifications: M16 hexagonal nut, performance grade 8; Prefabricated welding: CO2 gas shielded welding is used, the fillet weld is fully welded, the weld leg height is 7 mm (≥0.7×nut thickness), the welding is completed only in the factory, and there is no open flame on site.

[0019] Fixing bolt 1 Specifications: M16×150 mm fully threaded hex bolt, performance grade 8.8; Top pressure end: hemispherical head (SR10 mm), surface high frequency quenching hardness 35-40 HRC, to reduce local depressions under top pressure; Thread: Full-length thread rolling ensures locking at any position.

[0020] Optional shock-absorbing pads Material: EPDM rubber, thickness 3 mm, inner radius 55 mm, length 150 mm; Function: Isolates PVC pipes from steel channels, reduces rainwater impact noise, and protects the outer wall of the pipe.

[0021] II. On-site installation process, such as Figure 2 ; Step 1: Base cleaning Use a wire brush to remove loose rust and oil stains from the lower flange surface of the H-beam, ensuring a flatness of ≤1 mm / 100 mm and that the top pressure surface is properly fitted.

[0022] Step 2 Pre-install U-shaped groove 4 Place the U-shaped channel 4 on the lower flange and adjust its lateral position so that the pipe runs in line with the roof slope and the bottom of the channel is in close contact with the lower surface of the flange.

[0023] Step 3: Insert the pipe Place the DN100 PVC rainwater pipe into the U-shaped groove 4. If using a shock-absorbing pad, first place the EPDM strip and then place the pipe to ensure that the pipe fits snugly against the arc of the bottom of the groove.

[0024] Step 4: Single-sided top pressure locking ① Insert the fixing bolt 1 into the pre-welded nut and manually screw it in until the hemispherical head contacts the surface of the steel beam; ② Continue to tighten the fixing nut 3 with a ratchet wrench (torque 30-35 N·m). At this time, the hemispherical head presses down on the steel beam, the opening of the U-shaped groove 4 slightly contracts, and the pipe is naturally compressed. ③ Screw the fixing nut 2 in the opposite direction and tighten it to complete the double nut anti-loosening procedure. Single-point installation time ≤ 1 min.

[0025] Step 5 Spacing Settings Repeat steps 2-4 at a 1.5 m spacing as designed, without welding or openings throughout. The rainwater pipe is straight overall, and the measured lateral load is 1.2 kN, which is 1.0 kN higher than the design value.

[0026] III. Disassembly and Maintenance When pipes need to be replaced: 1. Loosen the fixing nut by unscrewing it in the opposite direction; 2. Use a wrench to rotate the fixing nut counterclockwise about 3 to 4 turns, and the hemispherical head will automatically detach from the steel beam; 3. Remove the U-shaped channel 4 and the pipe as a whole; the PVC pipe was uncut and undamaged. 4. Check the pressure point on the top of the hemispherical head. Only a shallow indentation of ≤0.1 mm should remain on the surface of the steel beam. The anti-corrosion coating should be free of cracks. Apply epoxy zinc-rich coating to repair the damage.

[0027] Single-point disassembly time ≤ 30 s, and the frame and bolts can be directly transferred to the next service cycle after cleaning.

[0028] This embodiment has been verified in environments where high-frequency maintenance of buildings is required and open flames are prohibited. It can be used equally for lightweight pipelines such as cables, rainwater pipes, and compressed air pipes on the surface of steel structures in commercial complexes, hospitals, and subway entrances. It is particularly suitable for green building scenarios that require repeated disassembly and assembly, zero open flame, and zero damage.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A zero-welding steel structure pipe top-pressure fixing device, characterized in that: include: U-shaped groove (4) is used to sit on the surface of the steel structure; Fixing nuts (2, 3) are pre-welded to the outer surface of the web plate on one side of the U-shaped groove (4) to form a non-rotatable threaded seat; The fixing bolt (1) penetrates the fixing nut (2, 3) and presses against the surface of the steel structure to form a unilateral pressing clamping force; The opening area of ​​the U-shaped groove (4) forms a pipe accommodating space. The pipe is placed in the opening, and the end face of the fixing bolt (1) is pressed against the steel structure by tightening the fixing nut (3), so that the pipe can be quickly fixed without welding or drilling. The fixing nut (3) can be loosened in the opposite direction to disassemble the whole and reuse it.

2. The zero-welding steel structure pipe top-pressure fixing device according to claim 1, characterized in that: The U-shaped channel (4) is formed by cold bending of scrap steel plate at the construction site. The wall thickness is 2-6 mm, the opening width is 50-200 mm, and the height is 40-100 mm. It can cover the outer diameter range of DN20-DN200 pipes.

3. The zero-welding steel structure pipeline top-pressure fixing device according to claim 1 or 2, characterized in that: The fixing bolt (1) is an M10-M20 fully threaded hexagonal bolt with a length of 100-300 mm. The top pressing end is a flat head or a hemispherical head. The contact surface is heat-treated to a hardness of ≥35 HRC to reduce top pressing deformation.

4. The zero-welding steel structure pipeline top-pressure fixing device according to claim 1, characterized in that: The fixing nuts (2, 3) adopt a double nut tightening structure, wherein the fixing nut (2) is used for pre-positioning and the fixing nut (3) is used for final tightening to prevent vibration from loosening.

5. The zero-welding steel structure pipeline top-pressure fixing device according to claim 1 or 4, characterized in that: The fixing nuts (2, 3) and the web of the U-shaped groove (4) are connected by full fillet welds. The welding is completed only in the factory or prefabrication site, and there is no hot work during the on-site installation and disassembly process.

6. The apparatus according to claim 1, characterized in that: An elastic rubber pad with a thickness of 2-4 mm is added to the inner side of the opening end of the U-shaped groove (4) for shock absorption, noise reduction and protection of the pipeline anti-corrosion layer.

7. The zero-welding steel structure pipeline top-pressure fixing device according to claim 1, characterized in that: The contact area between the top pressing end of the fixing bolt (1) and the steel structure is ≥50 mm. 2 The tightening torque is ≤40 N·m, which meets the 1.0 kN lateral bearing capacity requirement and can be completed with one hand.

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