A rotatable cantilever frame steel pipe positioning and fixing device

Abstract

The utility model belongs to the technical field of construction engineering, and specifically relates to a rotatable cantilever frame steel pipe positioning and fixing device. The positioning and fixing device comprises: an L-shaped steel plate, wherein the long plate of the L-shaped steel plate is arranged horizontally, and the short plate of the L-shaped steel plate is arranged vertically downward; the long plate is provided with a hook downward at the end away from the short plate, and a bolt hole is opened on the short plate, and a locking nut is welded on the outer side of the bolt hole; a short steel bar, wherein the short steel bar is arranged vertically, and the lower end thereof is welded and fixed to the upper surface of the long plate; a tightening screw, wherein the tightening screw is screwed into and passed through the bolt hole of the short plate through the locking nut, and a gasket is welded on the front end surface of the tightening screw. The positioning and fixing device is quick and easy to install and disassemble, and does not cause any damage to the I-beam, and has stable force. At the same time, it can be reused, saves materials, meets the requirements of green construction, and can be produced in a standardized and tooled manner, has stable quality, wide applicability, saves labor, and improves work efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of building engineering, and in particular relates to a rotatable cantilever frame steel pipe positioning and fixing device. Background Art

[0002] In the process of high-rise construction, it is inevitable to use a cantilever external frame protection system. In order to ensure that the steel pipe uprights are firmly fixed and accurately positioned, short steel bars of level 25 are usually welded on the cantilever I-beams on the construction site as positioning steel pipes. The height of the positioning bar is controlled at 150mm and is 100mm away from the end of the I-beam. Two positioning bars are required for each I-beam, and the two positioning bars are 800mm apart.

[0003] The existing technology not only wastes a large amount of steel bars, but also involves welding hot work, which is very dangerous. At the same time, since the quality is greatly affected by the workers' technical level, the welding quality of short steel bar heads welded on site is uneven and the steel bars cannot be adjusted after welding, which has poor flexibility. Later, when the main structure construction is completed and the external frame is dismantled, the short steel bar heads welded on the I-beams must be cut off during the turnover process, resulting in quality defects of the I-beams and waste of steel bar materials. In addition, using the existing process, welding is generally started after the I-beams are brought into the site, which also affects the progress of on-site construction. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a rotatable cantilever frame steel pipe positioning and fixing device, which is quick and easy to install and disassemble, does not cause any damage to the I-beam, has stable force, can be reused, saves materials, meets the requirements of green construction, and the positioning and fixing device can be standardized and tooled, has stable quality, wide applicability, saves labor, and improves work efficiency.

[0005] Specifically, the utility model provides the following technical solutions:

[0006] A rotatable cantilever frame steel pipe positioning and fixing device, comprising:

[0007] An L-shaped steel plate, wherein the long plate of the L-shaped steel plate is arranged horizontally, and the short plate of the L-shaped steel plate is arranged vertically downward; the long plate is provided with a hook downward at one end away from the short plate, and the short plate is provided with a bolt hole, and a locking nut is welded on the outer side of the bolt hole;

[0008] Short steel bars, which are arranged vertically and have their lower ends welded and fixed to the upper surface of the long plate;

[0009] A tightening screw is screwed into and passed through the bolt hole of the short plate through the locking nut, and a gasket is welded on the front end surface of the tightening screw.

[0010] The cantilever I-beam is an important load-bearing structural member in the cantilever external frame, and any modification (such as drilling and welding) will affect its structural strength. Traditional processes cannot avoid the need to weld or even drill holes on the I-beam to firmly fix the positioning ribs, causing irreversible damage to the I-beam. The rotatable cantilever frame steel pipe positioning device provided by the present invention does not require any modification to the I-beam. The positioning and fixing device is firmly fixed on the I-beam through the extrusion force of the tightening screw and the I-beam. Because the positioning steel bar (i.e., short steel bar) is welded together with the L-shaped steel plate, the positioning steel bar is fixed on the I-beam. The fixing frame clamping device adopts a quick-install and quick-disassemble connection design of the tightening screw. At the same time, in order to increase the force-bearing area with the I-beam, a gasket is welded at the end of the screw. Such a design not only avoids the loss of the tightening screw but also increases the stability of the fixing frame clamping device.

[0011] Preferably, the angle of the back hook relative to the long board is 45 degrees. Compared with other degrees, the angle of 45 degrees can have better stability and anti-slip effect, and also save more materials.

[0012] Preferably, the lower end of the short steel bar is welded and fixed to the middle of the upper surface of the long plate.

[0013] Preferably, the bolt hole is opened in the middle of the short plate.

[0014] Preferably, a locking nut is installed on the tightening screw.

[0015] Preferably, the tightening screw is made of steel, and the gasket is made of iron sheet.

[0016] Preferably, the thickness of the gasket is 3 to 5 mm.

[0017] Preferably, the size of the gasket is 3cm*3cm.

[0018] The beneficial effects of the utility model are at least:

[0019] 1) The utility model provides a revolving cantilever frame steel pipe positioning and fixing device, which has been installed after field tests. For I-beams of different specifications and sizes from 16# to 20#, the device can be firmly installed and has a wide range of applications;

[0020] 2) The utility model provides a recyclable cantilever frame steel pipe positioning and fixing device, which can be standardized and tooled, has a small size, light weight, low production cost and can be recyclable;

[0021] 3) The utility model provides a revolving cantilever frame steel pipe positioning and fixing device, which is easy and quick to install and disassemble, thereby improving construction efficiency;

[0022] 4) The utility model provides a rotatable cantilever frame steel pipe positioning and fixing device, which can accurately position and firmly fix the cantilever external frame steel pipe, thereby avoiding the damage to the I-beam caused by directly welding steel bars on the I-beam in the traditional way. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model provides a structural schematic diagram of a rotatable cantilever frame steel pipe positioning and fixing device.

[0024] Figure 1 Among them, 1. Short steel bars; 2. L-shaped steel plates; 3. Jacking screws; 4. Washers; 5. Locking nuts; 6. Locking nuts; 7. Cantilevered external frame I-beams. DETAILED DESCRIPTION

[0025] Whether the cantilever external frame steel pipe positioning device is firmly and accurately fixed is directly related to the safety and reliability of the cantilever external frame. The utility model provides a cantilever frame steel pipe positioning and fixing device with high installation efficiency, small size, light weight, wide applicability, simple construction operation, turnover, and no influence on the overall stress of the structure. The fixing device is welded and formed by all-steel components as a whole, with high quality standards, simple operation, convenient and quick installation, and a stable and reliable fixing method. At the same time, the position of the fixing device can be flexibly adjusted according to the actual situation on site to adapt to the horizontal spacing of the vertical poles. It can be mass-produced and the construction process is standardized. It solves the drawbacks of steel bar waste and damage to I-beams caused by traditional welding of short steel bars. It can also be used in I-beams of different specifications and models, reducing the cost of use and having strong adaptability.

[0026] The fixing and positioning device of the utility model adopts steel plates and steel bolts, which are ideal elastic-plastic materials, as main force-bearing components, and the materials are easy to obtain, and the force requirements can be met as fixed cantilever external frame steel pipes.

[0027] The utility model is a revolvable cantilever external frame steel pipe positioning and fixing device, which is easy to process, simple in structure and convenient to use. It is composed of an L-shaped steel plate and a matching screw rod. When using the device, the screw rod is first adjusted to a proper position, and then the end of the L-shaped steel plate with a hook is hooked on one side of the upper flange plate of the I-beam, and the other end is simultaneously inserted downward into the other side of the upper flange plate of the I-beam. The long plate bottom surface of the L-shaped steel plate is in close contact with the top surface of the I-beam, and then the screw rod is rotated to tighten the screw rod on the I-beam, and the fixing plate and the I-beam are firmly fixed by friction.

[0028] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the embodiment of the utility model is described clearly and completely below. The following embodiments are used to illustrate the utility model, but are not used to limit the scope of the utility model. If no specific technology or conditions are specified in the embodiment, the technology or conditions described in the literature in the field or the product manual shall be followed.

[0029] Example 1

[0030] Example 1 provides a rotatable cantilever steel pipe positioning and fixing device, which can be seen in Figure 1 ,include:

[0031] An L-shaped steel plate 2, wherein the long plate of the L-shaped steel plate 2 is arranged horizontally, and the short plate of the L-shaped steel plate 2 is arranged vertically downward; the long plate is provided with a hook downward at one end away from the short plate, and the angle of the hook relative to the long plate is 45 degrees, and a bolt hole with a diameter of 16 mm is opened in the middle of the short plate, and a locking nut 6 with a specification of 14 is welded on the outer side of the bolt hole;

[0032] A short steel bar 1, wherein the short steel bar 1 is vertically arranged, and the lower end thereof is welded and fixed to the middle of the upper surface of the long plate, and the height of the weld is not less than the plate thickness;

[0033] The steel clamping screw 3 is screwed into and passed through the bolt hole of the short plate through the locking nut 6. A locking nut 5 is installed on the clamping screw 3. A gasket 4 with a thickness of 3 mm is welded on the front end face of the clamping screw 3. The processing cross-sectional size of the gasket 4 is 3 cm*3 cm.

[0034] The L-shaped steel plate of this embodiment is processed from a 4mm thick steel plate. The steel plate is first processed into a semi-finished rectangular steel plate with a width of 5cm and a length of 19cm. The steel plate is then subjected to secondary processing using a hydraulic device to ensure that the length of the back-hook processing is 2cm, the length of the long plate in contact with the top surface of the I-beam is 11cm, and the length of the short plate bent 90° horizontally is 6cm. After the L-shaped steel plate is processed, a hole is drilled in the horizontal center of the short plate of the L-shaped steel plate, and a locking nut is welded on the outside. Then, a gasket is welded after the tightening screw passes through the locking nut. This gasket can both increase the stability of the fixing clamp support frame and the I-beam and prevent the tightening screw from being lost during use. Finally, a 10cm short steel bar with a diameter of 25 is welded in the center of the long plate of the L-shaped steel plate, and the height of the weld is not less than the thickness of the steel plate.

[0035] Before installation, screw the top screw to the appropriate position through the locking nut in advance so that the cantilever frame steel pipe positioning fixture can be inserted into the I-beam. Two positioning fixtures are set for each I-beam. During installation, the long plate of the L-shaped steel plate is placed flat on the plane of the I-beam, and then the locking nut is rotated to gradually screw the top screw through the locking nut, and the gasket on the front end of the top screw is tightly pressed against the web of the I-beam. The extrusion force generated by the gasket and the web of the I-beam makes the positioning fixture firmly fixed on the I-beam. Only one screwdriver is needed during the entire construction and installation process, which is quick to install and easy to adjust, avoiding the disadvantages of traditional construction positions that cannot be adjusted and damage to the I-beam.

[0036] After the installation is completed, if the position is improper, the position of the positioning and fixing device on the I-beam can be adjusted by adjusting the tightness of the nut. The utility model has the advantages of simple processing, simple structure and convenient use of the rotatable cantilever frame steel pipe positioning and fixing device.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A rotatable cantilever steel pipe positioning and fixing device, characterized in that: include: An L-shaped steel plate, wherein the long plate of the L-shaped steel plate is arranged horizontally, and the short plate of the L-shaped steel plate is arranged vertically downward; the long plate is provided with a hook downward at one end away from the short plate, and the short plate is provided with a bolt hole, and a locking nut is welded on the outer side of the bolt hole; Short steel bars, which are arranged vertically and have their lower ends welded and fixed to the upper surface of the long plate; A tightening screw is screwed into and passed through the bolt hole of the short plate through the locking nut, and a gasket is welded on the front end surface of the tightening screw.

2. The rotatable cantilever steel pipe positioning and fixing device according to claim 1 is characterized in that: The angle of the back hook relative to the long board is 45 degrees.

3. The rotatable cantilever steel pipe positioning and fixing device according to claim 1 or 2, characterized in that: The lower end of the short steel bar is welded and fixed to the middle part of the upper surface of the long plate.

4. The rotatable cantilever steel pipe positioning and fixing device according to claim 1 or 2, characterized in that: The bolt hole is opened in the middle of the short plate.

5. The rotatable cantilever steel pipe positioning and fixing device according to claim 1 or 2, characterized in that: A locking nut is installed on the tightening screw.

6. The rotatable cantilever steel pipe positioning and fixing device according to claim 1 or 2, characterized in that: The material of the tightening screw is steel, and the material of the gasket is iron sheet.

7. The rotatable cantilever steel pipe positioning and fixing device according to claim 1 or 2, characterized in that: The thickness of the gasket is 3-5 mm.

8. The rotatable cantilever steel pipe positioning and fixing device according to claim 1 or 2, characterized in that: The size of the gasket is 3cm*3cm.

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