CN204266572U - Scaffold wall connecting piece - Google Patents

Abstract

The utility model relates to a scaffold connecting wall piece. The utility model includes an L-shaped fixing plate, a metal pipe, a threaded screw rod, a PVC sleeve, two lock nuts and two square gaskets; the PVC sleeve is sleeved on the threaded screw rod and the square gasket There are through holes, and two square gaskets are respectively pierced on both ends of the threaded screw through the through holes; the longitudinal plate of the L-shaped fixing plate is drilled, and the L-shaped fixing plate is fixed on the threaded screw through the holes. One end is located outside the square washer, the transverse plate of the L-shaped fixing plate is fixedly connected with one end of the metal pipe; two lock nuts are respectively used to fix the square washer and the L-shaped fixing plate at both ends of the threaded screw rod On the threaded screw, the utility model has the following advantages: 1) simple structure, convenient disassembly and assembly; 2) good safety performance, guaranteed quality; 3) can be used repeatedly; 4) reduce the workload and work of wall repair difficulty.

Description

Scaffolding wall parts

technical field

The utility model relates to a scaffold connecting wall piece.

Background technique

Traditional scaffolding wall parts include pre-embedded steel pipe method, post-anchoring method, pre-embedded iron plate method and pre-embedded steel bar method, but actual analysis shows that the disadvantages of these commonly used scaffolding wall parts outweigh the advantages, such as pre-embedded steel pipe method, Not only is it costly, it is troublesome to dismantle, and there is a serious hidden danger of water seepage when the hole is blocked, but also gas cutting is often used during demolition, which is not conducive to fire protection; High, low turnover utilization rate, and has the disadvantages of safety and quality hidden dangers. Therefore, with the continuous innovation of building technology and the vigorous promotion of green construction, it is necessary to develop a tool-type wall connecting piece that is not only convenient to install and disassemble, safe, and guaranteed in quality, but also can be used repeatedly.

Contents of the invention

The purpose of the utility model is to provide a tool-type scaffolding wall part which is convenient for disassembly and assembly, safe and guaranteed in quality, and can be used repeatedly.

The purpose of this utility model is achieved through the following technical solutions: a scaffold wall piece, characterized in that it includes an L-shaped fixing plate, a metal pipe, a threaded screw, a PVC sleeve, two lock nuts and two square pads piece;

The PVC sleeve is sleeved on the threaded screw rod, and a through hole is opened on the square gasket, and two square gaskets are respectively pierced through the through holes at both ends of the threaded screw rod; the longitudinal plate of the L-shaped fixing plate is provided with There is a drilling hole, and the L-shaped fixing plate is fixed on one end of the threaded screw rod through the drilling hole and is located outside the square gasket. The transverse plate of the L-shaped fixing plate is fixedly connected with one end of the metal pipe; two lock nuts are respectively It is used to fix the square gaskets and L-shaped fixing plates at both ends of the threaded screw on the threaded screw.

Compared with the prior art, the utility model has the following advantages: 1) the utility model is simple in structure and convenient to disassemble; 2) the utility model has good safety performance and guaranteed quality; 3) the utility model can be used repeatedly , which embodies the advantages of environmental protection and energy saving; 4) The utility model has strong adaptability to the erection of scaffolding on the outer wall of different types of reinforced concrete buildings, and the wall connecting system can be easily and flexibly arranged according to different types of building structures. Minimize the impact of the layout of the wall-connecting parts on the engineering construction, and also reduce the workload and difficulty of wall repair; 5) The utility model can be recycled and used repeatedly after removal, without generating waste, and the wall-connecting parts It is easy to disassemble after use, and the impact of the wall parts on the wall structure is greatly reduced. The occupied area is only the area of the gasket, that is, 100×100mm ² , which is very small and has little impact on the subsequent decoration construction.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a schematic diagram of the use state of an embodiment of the utility model.

Fig. 3 is a schematic diagram of force calculation of an embodiment of the utility model.

Fig. 4 is a schematic diagram of force calculation results of an embodiment of the present invention.

Fig. 5 is a structural schematic diagram of an embodiment of the utility model used in conjunction with scaffolding.

Description of labels: 1 metal pipe, 2 L-shaped fixed plate, 3 threaded screw rod, 4 square gasket, 5 PVC casing, 6 inner main rod, 7 outer main rod, 8 throwing brace, 9 fastener, 10 reinforced concrete plate to be constructed , 11 cast-in-place concrete blocks, 12 lock nuts.

Detailed ways

Below in conjunction with description accompanying drawing and embodiment the utility model content is described in detail:

As shown in Figure 1: a scaffolding wall piece, which includes an L-shaped fixing plate 2, a metal pipe 1, a threaded screw 3, a PVC casing 5, two lock nuts 12 and two square gaskets 4;

The PVC casing 5 is sleeved on the threaded screw rod 3, and a through hole is provided on the square gasket 4, and two square gaskets 4 are respectively set on the two ends of the threaded screw rod 3 through the through holes; the L-shaped fixing plate 2 is provided with a drill hole on the longitudinal plate, and the L-shaped fixed plate 2 is fixed on one end of the threaded screw rod 3 through the drill hole and is located outside the square gasket 4. The transverse plate of the L-shaped fixed plate 2 and the metal pipe 1 One end is fixedly connected; two locking nuts 12 are respectively used to fix the square gasket 4 and the L-shaped fixing plate 2 at both ends of the threaded screw 3 on the threaded screw 3 .

The L-shaped fixing plate 2 is an equilateral angle steel.

The PVC casing 5 is used as a reserved hole. When the scaffolding wall is installed, the PVC casing 5 is pre-embedded in the wall or the reinforced concrete slab, and then the threaded wire 3 is passed through the PVC casing 5.

The utility model is used in conjunction with the fastener 9, and the fastener 9 is used to connect the wall part with the inner and outer main rods of the scaffold to form a rigid wall part for the horizontal connection between the scaffold and the reinforced concrete wall (beam, column, etc.) of the building. system.

Example 1

1) Threaded screw 1: choose Q235 steel material, diameter 20mm, length 50cm, the threaded screw 1 adopts trapezoidal thread, the threaded screw 1 can reduce the degree of wear, and can be recycled at the same time, the economic cost is low.

2) Square gasket: the size is 100mm×100mm, the thickness is 8mm, there is a round hole in the center, the hole diameter is 22mm, which can increase the compression area and reduce the damage of the wall.

3) Lock nut 12: it is used together with threaded screw anchors and is respectively placed on the inner and outer walls to reinforce the threaded screw.

4) Connecting wall rods: The connecting wall rods are composed of L-shaped fixed plates (2), that is, equilateral angle steel and metal pipe 1. Make sure that the equilateral angle steel used is Q 235 steel, the type of equilateral angle steel is L63×63×5, the thickness of the plate is not less than 5mm, the diameter of the drilling hole is d=22mm, and the welding seam of the metal pipe 1 and the steel plate of the equilateral angle steel should be full. The thickness of the weld seam is not less than 3.5 mm, which can meet the pullout resistance requirement of a single fastener 9 . The steel pipe adopts 48.3×3.6, and the standard length is 1.5m. In order to take into account the small horizontal bar, its quality conforms to the provisions of GB/T700 "Carbon Structural Steel", and the quality of equilateral angle steel conforms to the provisions of GB/T9787-1988. 5PVC casing: used for reserved holes, sawdust, and filled PVC pipes.

In the production process of the utility model, each part is manufactured according to the design size. Taking the standard connecting wall rod of this system as an example, the wind load is transmitted to the connecting wall part by the fastener 9 through the inner and outer vertical rods, and the fastener is assumed 9 have reached the design value of its anti-sliding load, that is, 8kN, and the eccentric bending moment formed by the load transferred to the connecting wall rod is 0.44kN m; Form the rigidity of the connection node between the wall rod and the reliable component of the building, and conservatively consider the joint 9 of the fastener as the hinge point. The schematic diagram of its force calculation is shown in Figure 3. The mechanical method can be used to solve the load of each node (see Figure 4).

As shown in Figure 4, the Φ16mm threaded screw is subjected to the tensile (compressive) shear action with an axial force of 16k N and a shear force of 0.636kN, which obviously meets the load-bearing capacity requirements; The maximum value occurs in the b~c section, which is 16kN, and is subjected to the action of the maximum bending moment value of 0.17kN m, which is a compression bending member; the B node is the welding node between the equilateral angle steel and the metal pipe, and the pressure on the weld is 16kN, the bending moment received is 0.00465kN·m.

1) For the metal pipe of the wall member:

λ＝1000×1.5/15.8＝95, Φ＝0.626,

For wall member metal pipe and equilateral angle steel weld joints:

$\mathrm{<span\; class="notranslate">\; \&sigma;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; m</span>}}{\mathrm{<span\; class="notranslate">\; W</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 16000</span>}}{\mathrm{<span\; class="notranslate">\; 330</span>}}<span\; class="notranslate">\; +</span>\frac{\mathrm{<span\; class="notranslate">\; 0.00465</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; 10</span>}}^{\mathrm{<span\; class="notranslate">\; 6</span>}}}{\mathrm{<span\; class="notranslate">\; 3980</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 50</span>}\mathrm{<span\; class="notranslate">\; N</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; mm</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; <</span>\mathrm{<span\; class="notranslate">\; 160</span>}\mathrm{<span\; class="notranslate">\; N</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; mm</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; .</span>$

The above calculations show that the combined tool type wall connecting system has good bearing performance.

2) Axial force on the wall parts:

The calculation value of the axial force of the connecting wall is calculated according to the formula: Nl＝Nlw+No

Where: Nlw——the design value of the axial force of the connecting wall part (kN) generated by the wind load, which shall be calculated according to the following formula:

Nlw＝1.4×wk×Aw

wk——wind load standard value, wk＝0.351kN/m2;

Aw——the windward area outside the scaffolding within the coverage area of each wall piece, Aw=3.0×4.5=13.5m2;

No——the axial force (kN) generated by the out-of-plane deformation of the scaffold constrained by the wall; No=5.00

After calculation, Nlw=6.63kN, and the calculated value of the axial force of the wall part Nl=11.63kN<16KN, so it can meet the bearing capacity requirements.

3) Safety check of connecting wall members:

When Φ48×3.6 steel pipes are used, two right-angle fasteners 9 are used to lock the two vertical poles inside and outside the scaffold for the connecting wall rods.

According to the strength requirements of the connecting wall members, the design value of axial force Nf1＝0.85AC[f]

According to the stability requirements of the connecting wall member, the design value of the axial force Nf2=0.85ФA[f]

Among them Ф - the stability coefficient of the vertical rod under axial compression, from the slenderness ratio: λ = L/i = 30/1.59 = 85, look up the table, the stability coefficient Φ = 0.95; the net cross-sectional area AC = 5.06cm2, the gross Cross-sectional area A = 26.10cm2, [f] = 205N/mm.

It is calculated that Nf1=88.17KN>N1, the design of the wall parts meets the strength design requirements,

It is calculated that Nf2=432KN>N1, the design of the wall parts meets the stability design requirements,

That is to say, when the connecting wall rod adopts Φ48×3.6 steel pipe, its stability and bearing capacity are sufficient.

4) Check the safety of the fastener 9:

The wall-connecting parts use 2 fasteners to lock the two vertical poles inside and outside the scaffold, and the distance between the wall-connecting parts and the main node should not be greater than 300mm. If it is greater than this value, the inclined rods can be added for support. Check it from the "Scaffold Specifications" , the bearing capacity of each fastener 9 is 8kN, then the bearing capacity of the fastener 9 is: 2×8=16kN>N1=11.63kN, the fastener 9 is safe.

5) Safety checking calculation of equilateral angle steel

The hole diameter of the hot-rolled equilateral angle steel 63×63×5 is d=22mm,

Effective tensile section: (63－22)×5＝205mm2

The design value of the tensile strength of the equilateral angle steel is: 205×205=42.03kN>N1=11.63kN, which meets the safety requirements.

6) Weld safety check calculation

The equilateral angle steel and the steel pipe adopt lap joint welding method, use E43 type electrode, manual arc welding hf=5mm, and the allowable tensile, shear and compressive strength [ftw] of the electrode is known to be 160Mpa. Tensile force N1 = 11.63kN. ftw＝N1/(0.7×hf×ΣLw)＝11.63×103/(0.7×5×63×2)＝26.37Mpa＜[ftw]＝160Mpa

Implementation effect: Through the above calculations, the structural system of the wall parts meets the safety requirements of the scaffolding on the exterior wall of the building, with clear force and reliable performance. Because the utility model has good load-bearing performance through bearing capacity calculation and axial force calculation in the manufacturing process.

Installation of the utility model:

1. If the exterior wall of the building is a reinforced concrete structure, when the reinforced concrete exterior wall (beams, columns, etc.) Sleeve, after the concrete reaches a certain strength, pass the threaded screw rod of the wall part through the PVC sleeve, and the inner side protrudes from the shear wall for no less than 10cm, and then fix it tightly with square gaskets and lock nuts, and the outer metal The pipe is tightly attached to the outer wall of the concrete shear wall, and the threaded screw rod and the equilateral angle steel of the connecting wall piece are fixed tightly with lock nuts, and the connecting wall piece is connected with the inner main rod 6 and the outer main rod 7 of the scaffold with fasteners 9 , to form a rigid wall-connecting system for the horizontal connection between scaffolding and reinforced concrete walls (beams, columns, etc.) of buildings.

2. If the exterior wall of the building is a masonry structure, when there is no reinforced concrete structural column or ring beam (as shown in Figure 2) in the installation part of the connecting wall, the cast-in-place with a length and width of ≥200mm should be installed in the wall. Concrete block 11, pre-embed a PVC casing with a diameter of Ф25 in the cast-in-place concrete block 11, and then set a threaded screw rod through the wall. A PVC casing with a diameter of Ф25 is pre-buried in the ring beam, and then a threaded screw rod is installed through the wall. After the above-mentioned concrete reaches a certain strength, the threaded screw rod through the wall is connected with the angle steel end of the wall fitting with a threaded screw rod, and a fastener 9 is used. The wall connecting parts are connected with 6 inner main rods and 7 outer main rods of the scaffold to form a rigid wall connecting part system for the horizontal connection between the scaffold and the building wall.

3. During the construction of the reinforced concrete slab structure on the building floor, a PVC casing with a diameter of Ф25 is pre-buried in the cast-in-situ concrete slab, and then the threaded screw rod is installed. After the above-mentioned concrete reaches a certain strength, the threaded screw rod and the The angle steel ends of the wall parts are connected by threaded screw rods, and the wall parts are connected with the inner main rod 6 and the outer main rod 7 of the scaffold by fasteners 9 to form a rigid wall part system for the horizontal connection between the scaffold and the structural plate of the building.

4. When initially erecting scaffolding, such as initially erecting scaffolding on cantilevered supports, or when the building has a high floor height and a large span, or for the superhigh section of the uppermost floor after the overall lifting of the scaffolding, the horizontal rigid connection The wall system cannot be arranged. At this time, when the reinforced concrete slab structure is being constructed on the building floor, a PVC casing with a diameter of Ф25 is embedded in the reinforced concrete slab 10 to be constructed, and then a threaded screw rod is installed through the plate. After the strength is achieved, connect the threaded screw rod through the plate and the angle steel end of the wall fitting with a lock nut, and connect the wall fitting with the inner main rod 6 and the outer main rod 7 of the scaffold obliquely by using a steel pipe and a fastener 9 to form a scaffold and The rigid throwing brace 8 system or the oblique rigid wall connecting system of the building structural plate is shown in Fig. The principle of replacement after addition is transformed into a rigid wall connection system that is horizontally connected to the exterior wall structure of the building.

The removal of the utility model:

During the removal of the fastener 9-type steel pipe exterior scaffolding after the exterior wall decoration is completed, the applicant also attaches great importance to the removal of the wall parts. The wall parts are removed layer by layer and synchronously with the scaffolding. It is strictly forbidden to remove the entire layer of the wall parts first. Then remove the scaffolding, according to regulations, when the scaffolding is dismantled in sections, the removal height difference shall not be greater than 2 steps.

1) When the scaffolding wall system is removed, first remove the fastener 9 connected to the pole;

2) Remove the lock nuts, gaskets, threaded screws, and connecting wall rods on the equilateral angle steel anchor plate;

3) Clean up, maintain and store centrally after the connecting wall rods, fasteners 9 and threaded screw rods are removed for next use.

4) After the connecting wall system is removed, the PVC sleeve is chiseled off, and the wall is repaired and leveled with cement mortar.

Implementation effect: The combined tool-type scaffolding wall system can be recycled and used repeatedly after dismantling, without generating waste. The wall parts are easy to disassemble after use, and the impact of the wall parts on the wall structure is greatly reduced. The occupied area is only the area of the gasket, that is, 100×100mm ² , which is very small and has little impact on subsequent decoration construction.

Claims (1)

1. a scaffold wall connecting piece, is characterized in that: it comprises L shape fixed head (2), metal tube (1), threaded screw rod (3), PVC sleeve pipe (5), two locking nuts (12) and two pieces of square washers (4);

Described PVC sleeve pipe (5) is sheathed on threaded screw rod (3), and (4) offer through hole to square washer, and two pieces of square washers (4) are arranged in the two ends of threaded screw rod (3) respectively by through hole; Longitudinal plate of L shape fixed head (2) offers boring, L shape fixed head (2) is fixed on an end of threaded screw rod (3) by boring and is positioned at square washer (4) outside, and the transverse plate of described L shape fixed head (2) and one end of metal tube (1) are fixedly connected; Two locking nuts (12) are respectively used to the square washer (4) at threaded screw rod (3) two ends and L shape fixed head (2) to be fixed on threaded screw rod (3).